MINISTRY OF EDUCATION AND TRAINING
UNIVERSITY OF TRANSPORT AND COMMUNICATIONS

BUI XUAN CUONG

RESEARCH ON REASONABLE ASSESSMENT OF
SOLUTION FOR INTERCHANGE CONSTRUCTION
IN HO CHI MINH CITY

Specialization: Special Construction Engineering
Code:
958.02.06

SUMMARY OF ENGINEERING DOCTORATE
THESIS

Hanoi - 2019


The thesis was completed at:
University of Transport and Communications

Academic supervisors:

1. Prof.Dr. Nguyen Viet Trung
2. Assoc Prof.Dr. Nguyen Ngoc Long

Reviewer 1: …………………………………………….
Reviewer 2: …………………………………………….
Reviewer 3: …………………………………………….

The dissertation will be presented at the university-level dissertation
assesment council at the University of Transport and
Communications
Time ……… hour, day …… month ……. year………..…

The dissertation can be found at:
- National Library
- University of Transport and Communications Library


INTRODUCTION

1. Rationale of the Research
Ho Chi Minh City has more than 300 years of establishment
(development and is the leading center of economy, trade, science)
technology and education of the whole country. Currently, with the densely
population of more than 10 million people, traffic system is often congested
and unable to meet the development needs. There are many problems of
planning, construction investment, and traffic functions in general and
especially at important interchanges in the city. Therefore, the demand for
investment in construction of interchanges not only is high but also must
meet the requirements of fast construction time, less obstructing traffic,
ensuring economic - technical requirements, aesthetic as well as
convenience during exploitation, maintenance and reparation. However, the
analysis and evaluation of construction investment options are still
qualitative and subjective, not applying advanced methods in evaluation, so
many investment decisions are not really reasonable and effective. results in
construction investment in Vietnam in general and in Ho Chi Minh City in
particular.
One of the current trends in the world is the study of applying Analytic

Hierarchy Process method (AHP) combining with Analytic Network
Process method (ANP) and other methods to develop evaluation procedures
with criteria system quantified by specialized software. Therefore, this trend
is a topical issue of scientists in the world and in Vietnam. That is the
reason why PhD student choose this topic to research.
Name of the PhD thesis: “Research on reasonable assessment of solution
for construction of different levels interchanges in Ho Chi Minh City”.
2. Objective of the Research
Research and development of a system of criteria and a model for
evaluating alternative interchange solutions suitable to the planning;
Investment period and specific conditions of Ho Chi Minh city.
3. Significance of the Research
- Subject of the research : Criteria for evaluation and selection of
construction investment plans.

1


- Scope of the research: The system of criteria, models, and procedures
for evaluating span structure solutions for building interchanges at level 3
(Evaluating and choosing alternative interchange construction solutions) in
Ho Chi Minh City.
4. Research Methodology
Theoretical research methods such as: analysis and synthesis theory;
diagram method and mathematical statistical method;
Practical research methods: Using a combination of survey methods,
expert methods, analytical methods and summarizing experience.
5. Scientific, practical signifcance and contribution of the thesis
- Scientific significance of the thesis: The thesis has good scientific
significance in assessing the rationality of technological solutions, has built

and proposed evaluation models of other interchange construction solutions.
levels in Ho Chi Minh City according to the set of quantified indicators,
from which it is possible to make selection decisions based on the above
criteria and evaluation models.
- Practical significance of the thesis: The evaluation model according to
the set of indicators quantified in the thesis has high practical significance
because it can be used immediately and promptly to evaluate a number of
new projects to build interchanges. different levels in Ho Chi Minh City as
well as specific projects have been developed to consider their validity.
- New contribution of the thesis:
+ The thesis has applied the advanced theory of Analytic Hierarchy
Process method (AHP) combined with Analytic Network Process method
(ANP) to research and develop quantified indicators in comprehensive
assessment and technological structure solutions and organization of
construction of interchanges at different levels in specific conditions in Ho
Chi Minh City.
+ The thesis has built an evaluation model and selected the application
of open software Super Decisions to evaluate interchange projects at
different levels in Ho Chi Minh City according to three levels: 1) Evaluation
of planning, selection of investment projects list; 2) Assess and select the
list of key projects by phase; 3) Detailed assessment of solutions and
technologies of design alternatives for construction of interchanges at
different levels.

2


+ The thesis has applied the evaluation model according to the set of
criteria set and the open software Super Decisions to evaluate some
interchange projects that have been implemented in Ho Chi Minh City. Ho

Chi Minh. Initial evaluation results show the effectiveness of the proposed
toolkit.
+ Some research results of the thesis can be used as references in the
evaluation of alternative interchange construction options in Ho Chi Minh
City. Ho Chi Minh and in other urban areas have similar conditions.
6. Contents of the thesis
The thesis includes: Introduction, 4 chapters, Conclusion and
recommendation as follow:
Chapter 1: Overview.
Chapter 2: Researching the theoretical basis to evaluate and select
reasonably for different interchange construction solutions
Chapter 3: Develop a system of criteria and a model to evaluate and
select appropriately the solution of constructing interchanges at different
levels in Ho Chi Minh City.
Chapter 4: Apply reasonable selection of solutions to build different
interchanges for some projects invested in Ho Chi Minh City.
Conclusion and Recommendation.

3


CHAPTER 1. OVERVIEW
1.1. Overview of specific conditions, current status and planning of
interchanges at different levels in Ho Chi Minh City
Ho Chi Minh City has the coordinates 10 ° 10 '- 10 ° 38' North and 106 °
22 '- 106 ° 54' East, the North borders Binh Duong Province, the Northwest
borders Tay Ninh Province, the East and Northeast borders the Province
Dong Nai and Southeast borders Ba Ria - Vung Tau province, West and
Southwest borders Long An and Tien Giang provinces.
Located in the transition zone between the Southeast and Southwest, Ho

Chi Minh City today consists of 19 districts and 5 districts, total area of
2,095.06 km². The official population (on April 1, 2009) was 7,162,864
people (accounting for 8.34% of Vietnam's population), an average density
of 3,419 people / km²; By 2019, the city population will reach 8,993,082
people, if unregistered residents are counted, the actual population in 2018
of this city will be nearly 14 million. Playing an important role in Vietnam's
economy, Ho Chi Minh City accounts for 21.3% of total product (GDP) and
29.38% of the country's total budget revenue. Thanks to favorable natural
conditions, Ho Chi Minh City has become an important transport hub of
Vietnam and Southeast Asia, including roads, railways, waterways and
airways [1] and [2].
However, Ho Chi Minh City is facing the problems of a large city whose
population is growing too fast. In the inner city, roads become overloaded,
often congested. Public transport system inefficient. The city environment is
also being polluted by transportation, construction sites and manufacturing
industries [1].
1.2. Overview of the research to select different interchange
construction solutions
The philosophy of design - construction and research and development
direction of this technology is to make ready-made bridge components of
slender, light, durable size ... easy to transport and quickly assemble at the
site; or completely built span structure at a place other than the construction
site, then transport the whole span by self-propelled modular transporter
(SPMTs) and then install it into the span where the abutment has been
constructed [5], [6] , [7].
Construction technology using components and assembled structures has

4



become popular in the US and Europe for more than 20 years. In recent
years, many countries are studying and considering the application of
construction technology to solve bridge construction problems in urban
areas.
In Vietnam, for the past 15 years, along with the development of science
and technology and the need to build bridges for socio-economic
development, there are also a number of sample design and design
documents, construction drawing for construction project according to
Standard 22 TCN 272-05; a number of master's theses, doctoral theses,
scientific research projects at all levels and articles have initially applied
research, improvement, evaluation and selection of reasonable solutions and
technologies for works. road bridges in general and bridges and overpasses
in urban areas in particular.
According to the data of the interchange projects that are different from
the ones already built in Ho Chi Minh City, stored at the Construction
Management Department of the Department of Transportation and
Communications of Ho Chi Minh City [41]; in general, the main structure
of the interchange is summarized in the thesis.
Table 1.1. Statistics of main structural types have been applied to the
interchanges at levels in HCMC
TT Interchange

Span
structure

Substructure
Abutment

Pier


Foundation

1

Cong HoaHoang Hoa
Tham

Steel box
girder

Reinforced
concrete

Steel

Pipe
pile500

2

Cay Go

Steel box
girder

Reinforced
concrete E

Steel


Bored pile
1200

3

Hoang Văn
Thu Truong Son
– Cong Hoa

Steel beam I

Reinforced
concrete

Steel

Pipe
pile500

4

Hang Xanh

Steel beam I

Reinforced
concrete

Steel


Pipe
pile500

5

Structure to keep the
bridge
SGT and
Foundation
TC

Load
reduction
floor “ U’
and
retaining
wall “ L”
Reinforced
concrete
Load
reduction
floor “ U’
and
retaining
wall “ L”

Pipe pile500

Pipe pile300



TT Interchange

Span
structure

5

Nguyen Tri
Phuong – Ba
Thang Hai –
Ly Thai To

Steel box
girder

Reinforced
concrete

Steel

Pipe
pile500

6

Thu Duc
carrefour

Steel box

girder

Reinforced
concrete

Reinforced
concrete

Pipe
pile500

7

Truong Son
- Tan Son
Nhat – Bình
Loi – Outer
belt

Steel box
girder

Reinforced
concrete

Steel

Pipe
pile500


8

Nguyen Thai
Son –
Nguyen
Kiem

Steel box
girder

Reinforced
concrete

Steel

Bored pile
1200

Concrete
box girder

Reinforced
concrete

Reinforced
concrete

Bored pile
1500


9

My Thuy –
Bridge
section
My Thuy –
Bridge
section

10

Monument

Substructure

Structure to keep the
bridge
Reinforced
concrete
Load
reduction
floor “ U’
and
Pipe pile300
retaining
wall “ L”
Reinforced
concrete
Sàn giảm
tải dạng

hộp
Móng nông
Reinforced
concrete
Load
reduction
floor “ U’
and
Pipe pile300
retaining
wall “ L”
Reinforced
concrete
Load
reduction
floor “ U’
Bored pile
and
1200 và
retaining
móng nông
wall “ L”
Reinforced
concrete

Main closed tunnel and leading tunnel “U” by Reinforced concrete , tunnels are set on
pile foundation Reinforced concrete 40x40cm.
Main closed tunnel and leading tunnel “U” by Reinforced concrete, tunnels are set on
pile foundation bored pile 1200


1.3. Overview of evaluation methods for choosing construction solutions
in the world
In fact, many individual or institutional decisions are made on multiple
grounds. Therefore, a Multi-attribute utility theory (MAUT) was created to
assist decision makers in decision making. MAUT has two types of
problems: the issue of discrete replacement criteria and the problem of
6


optimal criteria (multiple criteria discrete alternative problems and multiple
criteria optimization problems).
Analysis and evaluation of relevant scientific works in Vietnam:
Subject: "Research and assess multi-criteria solutions for designing and
constructing concrete bridges to meet the requirements of sustainable
development" by Assoc. Prof. Dr. Bui Trong Cau gave the implementation
method and sequence. implementing the application of AHP (Analytic
Hierachy Process) in the multi-criteria evaluation of design solutions of Lai
Xuan bridge project [43].
Project “Application of GIS and AHP to locate BRT bus stops: Vo Van
Kiet - Mai Chi Tho route,Ho Chi Minh City ”, the topic focuses on
identifying the optimal locations for establishing bus stops for BRT.
The scientific article “Application of GIS and Analytic Hierachy Process
(AHP) to create landslide risk map of Xin Man district, Ha Giang province,
Vietnam [45].
1.4. Issues thesis can be inherited and needs to be addressed
In order to study and apply fast construction structure and technology to
Ho Chi Minh City area, the thesis can inherit the achievements of previous
studies in the world and Vietnam: in many ways, the previous research has
gained significant results on structural solutions and fast construction
technology that can be applied to the construction of interchanges at

different levels in Ho Chi Minh City that the thesis can inherit. However, in
order to apply this technology to the characteristics of Ho Chi Minh City, it
is necessary to research, adjust, supplement and evaluate the options
accordingly, helping investors and appraisers have the evaluation tool. in
order to select a reasonable plan to invest in building interchanges of
different levels in Ho Chi Minh City.
1.5. Objective of the thesis
Studying and developing a system of criteria to evaluate and select
rationally the solutions for building interchanges at different levels in the
city. Ho Chi Minh is suitable with the planning, investment period and
characteristics of the city with high traffic density, narrow construction
ground, weak ground; meet the requirements of fast, safe, beautiful
construction, reduce traffic congestion, reduce environmental pollution,
have financial plans and reasonable prices, convenient maintenance. From
that, propose an evaluation model with a quantified criteria system to

7


evaluate the reasonable choice of solution for constructing interchanges at
different levels in Ho Chi Minh City and in other urban areas which have
the same situation.
1.6. Research Methodology
Using theoretical research methods such as: analysis and synthesis
theory; diagrammatic methods to conduct an overview study and a
theoretical basis for the construction of a system of criteria and a structure
model of the evaluation process, and a reasonable selection of construction
solutions;
Using a combination of survey methods, expert methods, analytical
methods and summarizing experience to conduct practical research on the

model of rational selection and evaluation of alternative interchange
construction solutions in Ho Chi Minh City.

8


CHAPTER 2. RESEARCHING THE THEORETICAL BASIS TO
EVALUATE AND SELECT REASONABLY FOR DIFFERENT
INTERCHANGE CONSTRUCTION SOLUTIONS
2.1. Mathematical model of evaluating construction solutions [42]
The evaluation of design solutions to select the best design solution for
construction works is described accurately and briefly using mathematical
models.
Các giải pháp thiết kế
{A1=(Q1,C1), A2= (Q2,C2),,An=(Qn,Cn)}

Các mô hình hay phơng pháp toán học
lợng hoá hỗ trợ việc đánh giá

-

Nhóm chuyên gia
phân tích, Những
ngời ra quyết
định, Công chúng.

Đánh giá

+
Thiết kế lại


Lựa chọn đợc giải pháp tốt nhất
và điều chỉnh để làm tốt hơn giải pháp đã chọn

Figure 2.1 Assessment model of construction solutions [44]
One of the most prominent and most widely used methods in the world
is the hierarchical analysis method -Analytic Hierarchy Process (AHP).
The steps for implementing AHP include 6 main steps:
Step 1: Establish a decision picture
Step 2: Calculate the weights for the criteria
Step 3: Calculate specific priority index for each plan
Step 4: Calculate the general priority index.
Step 5: Perform sensitivity analysis.
Step 6: Make the final decision.
9


Figure 2 2. AHP hierarchy
AHP method still has weaknesses, namely that each plan depends on the
criteria and indicators affecting the common goal, and the indicators must
be independent of each other. Assuming that the criteria depend on the
alternatives, the indicators affect the other indicators, and how the plans
depend on the other alternatives, how do we handle them? For example, in
the evaluation criteria system proposed by the research team, the criteria
"Ensuring the smoothness of traffic along the route" and "In accordance
with the development orientation of city traffic" affect and depend on each
other. In addition, in many practical cases, complex decisions require
feedback from the parties. In such cases, the AHP method cannot be
handled. Therefore, we need to use the ANP method. The ANP method is
an improved form of the AHP method. So it has the strengths of AHP and

overcomes the weaknesses of AHP. Using ANP, we can model a multicriteria decision in which small decisions are dependent and responsive.
From there, we can calculate the weights of specific and general targets and
priority indicators more accurately.
2.2. Proposing models and selecting analytical and evaluation software
Currently, there are many softwares to support the evaluation and
decision making of the appropriate options and solutions under the AHP /
ANP method such as Expert choice software (1980, USA) to help

10


organizations around the world. make better decisions, faster and more
transparent [46]; software KlMSG (Business Performance Management
Singapore, 2013) by Klaus [47], ..... However, these software are only based
on hierarchical analysis method (AHP) and have not combined ANP
method yet.
The open software SuperDecisions supports the evaluation and decision
making of the solutions based on both hierarchical analysis methods (AHP)
and the advanced network analysis (ANP) method of Thomas L. Saaty
(1926–2017). This software was funded by the Creative Decisions
Foundation (1996, USA) of the Thomas L. Saaty family [48].
Therefore, the thesis proposes to use the open software SuperDecisions
to support the evaluation and make a decision to select reasonable
interchange construction solutions.
2.3. Research outcome of the Chapter
The method of constructing a set of weights for the set of criteria for
evaluating interchange construction solutions other than the application of
the AHP algorithm is an effective tool for calculating the multi-criteria
weighting set, by dealing with a series of pair comparisons, which help to
bring together both subjective and objective aspects of an assessment. In

addition, AHP incorporating ANP is a useful technique to test the suitability
of expert reviews, thereby reducing bias in decision making.
Building a set of weights for multi-criteria evaluation and evaluation of
interchange construction solutions using AHP algorithm and ANP method
also allows the synthesis of many experts' evaluation on the priority order of
common criteria. through the real value of the set of weighted criteria for
quick construction evaluation.
The thesis proposes to choose to use the open software SuperDecisions
to support the evaluation and make a reasonable decision to select
interchange building solutions based on hierarchical analysis method (AHP)
combined with analytical method. Advanced Network (ANP) by Thomas L.
Saaty (1926–2017).

11


CHAPTER 3. DEVELOP A SYSTEM OF CRITERIA AND A MODEL
TO EVALUATE AND SELECT APPROPRIATELY THE SOLUTION
OF CONSTRUCTING INTERCHANGES AT DIFFERENT LEVELS
IN HO CHI MINH CITY
3.1. Assessment model of rational selection of solutions to build
interchanges at different levels
Evaluation level 1: Planning and selecting investment lists
At this level, interchanges across the city will be assessed as a whole to
be consistent with the city's planning, guidelines and investment decisions
of the Government; From that, the list of interchanges will be determined at
the next level.
Evaluation level 2: Select the list of key projects in different stages
At this level, the interchanges approved from level 1 will be assessed on
the level 2 criteria system in order to select the investment order of the

interchanges. See which interchanges will be in the short, medium, and
long-term portfolio. From there, interchanges will be classified.
Evaluation level 3: Detailed evaluation, rational selection of
construction solutions
From interchanges that have been assessed at the second level, each
interchange will be assessed in detail for the construction solution. As a
result, we can know which option is the most optimal for that interchange.
Evaluation level 4: Adjustment when incurred (extension of the
model)
- Adjust the construction progress closely to the plan: when the
construction progress is delayed due to some objective factors such as
natural disasters, construction errors with designs or some unforeseen
causes, measures must be taken promptly to the planned schedule.
- Technical adjustment: When the construction deviates from the design,
due to natural disasters, traffic collisions, ... damaging the building or when
the actual construction has different elements compared to the first survey,
the design is wrong. It is necessary to make timely and appropriate
adjustments to suit the conditions of Ho Chi Minh City, while ensuring
project progress.
- Costs incurred: adjustment of expenses incurred due to the volume
incurred and the price slippage of materials.

12


3.2. Evaluation criteria system

Figure 3.1. The system of criteria to evaluate and select appropriately
the solutions to build interchanges at different levels in Ho Chi Minh
City

Table 3.1. Statistics of sensory evaluation for the target system for
investment options at Hang Xanh interchange
C3
C3.1
C3.1.1
C3.1.1.1
C3.1.1.2
C3.1.1.3
C3.1.1.4
C3.1.1.5

Detailed evaluation, rational selection of
construction solutions
Technical Design
Structural Solution
Compliance with standards and technical
regulations in the design
Rationality of span structure solution
Rationality of substructure solution
Rationality of superstructure solution
Rationality of design solution with

13

Expert in managing
construction
investment projects
Technical Design
expert



C3

C3.1.1.6
C3.1.2
C3.1.2.1
C3.1.2.2
C3.1.2.3
C3.1.2.4
C3.1.2.5
C3.1.2.6
C3.1.2.7
C3.1.3
C3.1.3.1
C3.1.3.2
C3.1.4
C3.1.4.1
C3.1.4.2
C3.1.4.3
C3.2
C3.2.1
C3.2.2
C3.2.3
C3.2.3.1
C3.2.3.2
C3.3
C3.3.1
C3.3.2

Detailed evaluation, rational selection of

construction solutions

Expert in managing
construction
investment projects

investment policy
Sub structures, drain, cable system
Technical solution
Advanced technology
In accordance with construction technology
solutions and investment guidelines
Compliance with construction technology
standards and regulations
Compliance with structural solution
Technology readiness
In accordance with the actual construction
conditions in Ho Chi Minh City
Construction progress
Design solutions ensure construction safety
Labor protection equipment
Safety when using machines, materials and
chemicals
Design solutions to ensure environmental
sanitation
Dust
Noise
Waste disposal
Experts in economic
finance, accounting,

cost estimation

Financial Plan
Total investment
Operation and exploitation cost
Feasibility evaluation of the project
NPV
IRR
Traffic impact during construction phase
Affect surrounding people
Support capacity of regulatory options

14

Planning expert,
executive
management of urban
transport


C3

Detailed evaluation, rational selection of
construction solutions

C3.3.3

The degree of occupancy of the road surface

C3.4

C3.4.1
C3.4.1.1
C3.4.1.2
C3.4.1.3
C3.4.1.4
C3.4.1.5
C3.4.1.6
C3.4.1.7
C3.4.2
C3.4.4
C4

Expert in managing
construction
investment projects
Expert in urban
architecture planning

Ensure urban landscape
Harmony of the construction
Colour
Structure
Architecture design
Construction quality
Lighting system
Construction material
Support equipment
Make use of spaces to plan trees
Highlights of urban landspace
Decision making in case of adjustment


C4.1

The progress is close to the plan

C4.2

Technical adjustment

C4.3

Impact on traffic

C4.4

Costs incurred

Expert in managing
construction
investment projects
Expert in construction
management, traffic
management
Technical Design
expert
Planning Expert ,
executive management
of urban transport
Experts in economic
finance, accounting,

cost estimates

3.3. Data processing on the software platform Super Decisions
The thesis proposes the evaluation model "Rating model". In
essence, the "Rating model" is based on AHP algorithms but is modified
to assist assessors in assessing targets in large numbers. The decision
maker only needs to select the proposed sentimental assessments (Scale)
by graduate students and experts. After that, the remaining data

15


processing will be processed by the supporting software. The evaluation
through the rating model is done as follows:
- Preparation phase:
- Evaluation phase:
Đánh giá tiêu chí
Đánh giá tiêu chí
CHUYÊN GIA

qua mẫu phiếu có

Kết quả đánh g iá

Lượng hóa đánh giá

Kết quả

Trọng số tổng quát cho từng phương án


sẵn

Kết quả: Phương án tốt nhất đẻ thực hiện
Xử lý số liệu
Các đánh giá đã
được số hóa

Xử lý tầm quan trọng

Xử lý sự phụ thuộc, ảnh

bằng AHP

hưởng bằng ANP

Tầm quan
trọng giữ a
các tiêu chí
với nhau
IC < 0.1

Tầm quan
trọng giữa
các tiê u chí
với nhau
IC < 0.1

Tầm quan trọng của
mỗi phương án với
các tiêu chí phụ


No
No

Yes

Rating model

Các c huyên g ia đề
xuất Cate gory,
Mức độ và Than g
điểm cho mức độ

Yes
Xử lý
nhiễu

Xử lý
nhiễu
Dữ liệu đầu
vào

Dữ liệu đầu
vào

Nhập số liệu vào phần mền
Super Decisions

Figure 3.2. Evaluation block diagram of a reasonable selection of
construction solutions using SuperDecisions software

3.4. Results obtained from the model
After performing the evaluation process and applying the data
processing model combining AHP and ANP to evaluate the construction of
interchanges in Ho Chi Minh City, the thesis obtained an overall weight for
each method. project, from which to compare and draw the best plan, most
suitable for each specific interchange.
3.5. Research outcome of the Chapter
Previously, the criteria for technical design evaluation in the project
selection evaluation measures must be independent and not closely linked to
each other. However, the reality shows that the evaluation of independent
indicators is difficult compared to when there is interaction with each other.
Therefore, in this model, the criteria allow interaction and correlation with
each other to create unity in the structure.
The evaluation of construction design solutions is also a fuzzy multiattribute decision-making problem, so the methodology of evaluating

16


construction design solutions that are presented can be completely applied
to evaluate the design solutions. Construction plan to choose the best
solution. Because the evaluation of construction design solutions has a
number of specific characteristics, the application of the evaluation method
also has its own characteristics of evaluating construction design solutions
and criteria for selecting good solutions. most, typical evaluation criteria
and the methodology to apply the method for evaluation.

17


CHAPTER 4. APPLY REASONABLE SELECTION OF SOLUTIONS

TO BUILD DIFFERENT INTERCHANGES FOR SOME PROJECTS
INVESTED IN HO CHI MINH CITY
The thesis has conducted a pilot evaluation of construction solutions in
Hang Xanh, Truong Son and Hoang Hoa Tham interchange projects in Ho
Chi Minh City. Evaluation results were collected during the meeting on
March 31, 2018 at the Department of Transport of Ho Chi Minh City. The
expert's evaluation is evaluated through available forms, the evaluation is
conducted in level 3: Detailed evaluation, reasonable selection of
construction solutions. The selected plan is based on the criteria that have
been evaluated and evaluated by experts.
4.1. Introducing the construction solutions of the thesis
Solution 1: Normal I beam
Solution 2: SCP beam (Steel-Confined Pre-Stressed Beam)
Solution 3: Composite Steel beam
Solution 4: I beam with low height
Solution 5: beam
4.2. Applying models and software to evaluate and select appropriately
the solution of constructing interchanges at different levels in Ho Chi
Minh city.
In order to have a proper assessment of different interchange
construction solutions in Ho Chi Minh City, each solution needs to be fully
evaluated with the most necessary economic-technical criteria as possible.
The thesis proposes a table of criteria to evaluate and select reasonably the
construction solutions of interchanges at different levels in Ho Chi Minh
City.
Table 4.1: Scale table comparing priorities
Scale table comparing priorities
Evaluation
Extremely less important
Much more less important

Much less important
18

Score
1/9
1/8
1/7
1/6
1/5


Less important
Equally important
More important
Much more important
Very much more important
Extremely more important

¼
1/3
½
1
2
3
4
5
6
7
8
9


The assumption to build the AHP model is that the criteria must be
independent of each other. Therefore, to solve this problem, we will apply
ANP model. Building ANP model in Super Decisions v2.8 is very easy and
intuitive.
Due to the large number of Solutions, as well as the secondary criteria
for evaluating the Solutions, it makes the evaluation process must be
repetitive, boring and time-consuming, so the dissertation proposed a
strike model. "Rating model" price to handle targets. From the evaluation
sheets of experts and decision makers, summarize the results, then input
them into the Super Decisions software.
4.3. Application of evaluation model on Hang Xanh interchange

Figure 4.1. Hang Xanh
overpass viewed from above

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Figure 4.2.Location of Hang
Xanh overpass on the map


The aggregate results obtained after evaluating the rational choice of
construction solutions according to the model and software:
Table 4.2. Statistical evaluation table for sensory system for target
solutions for investment solutions at Hang Xanh interchange

Superdecision software automatically calculates weights when inputting
data:


Figure 4.3. General results for 5 solutions designed at
Green Delivery interchange
When assessing construction measures at Hang Xanh interchange - Ho
Chi Minh City. Technical criteria are considered more important,
accounting for more than half of the weight compared to the average
weighted average. The beauty criteria also account for a large proportion in
the evaluation results. The criteria for economy, and traffic impact make up
a negligible part of the weighted average. From the evaluation results,

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Combined Solution A3- Steel is considered to be the most optimal Solution
and there is a difference from the Solution applied in addition to the fact
that using regular I beam.
4.4. Application of evaluation model on Cong Hoa - Hoang Hoa Tham
interchange

Figure 4.4. Cong Hoa – Hoang
Hoa Tham overpass

Figure 4.5. Location of the overpass
on the map

Figure 4.6. Sensitivity analysis for Hoang Hoa Tham interchange
When evaluating construction methods at Hoang Hoa Tham interchange
- Ho Chi Minh City. Technical criteria are considered more important,
accounting for more than half of the weight compared to the average
weighted average. The criteria of aesthetics and traffic impact also
constitute a large weight in the evaluation results. Economic criteria


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constitute a negligible part of the total weighted average. From the
evaluation results, Solution A1- SCP beam is considered to be the most
optimal Solution and there is a difference from the Solution applied in
addition to the fact that using the combined Steel box girder beam.
4.5. Application of evaluation model on Trường Sơn interchange
When evaluating the construction methods at Truong Son interchange Ho Chi Minh City, the technical criteria are still high in weight, but at this
interchange, the aesthetic and impact on traffic during the construction
process. be considered highly valued. Then consider the economic criteria.
From the results of the evaluation, Solution A3 - Combined Steel is
considered to be the most optimal Solution and has a homogeneity
compared to the Solution that is applied in addition to the fact that using
combined Steel box girder beams.

Figure 4.7 Results obtained

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CONCLUSION AND RECOMMENDATION
With the objective of studying and building a system of criteria and a
model for evaluating different intersection construction solutions at a level
suitable to the planning; investment period and specific conditions of the
HCM city, the thesis has used the theoretical research method combined
with practical research methods to analyze and find out outstanding
problems. Specifically, the thesis has studied the application of hierarchical
analysis methods (called AHP-Analytic Hierarchy Process) combining

advanced network analysis methods (referred to as ANP-Analytic Network
Process) and methods. Other in the field of construction investment to
propose an evaluation model with a system of quantified criteria to evaluate
and select the option of constructing intersections at different levels in the
HCM city according to three levels: 1) Assessing the planning, selecting the
list of investment projects; 2) Assess and select the list of key projects by
phase; 3) Detailed assessment of solutions and technologies of design
alternatives for construction of intersections at different levels.
From the research results, some general conclusions in the thesis can be
drawn as follows:
The thesis has systematized theories related to the research scope of the
topic. The system of theoretical studies has been combined with the
practical knowledge foundation to successfully build a new model that
allows a comprehensive assessment of technology structural solutions and
construction organization. intersection level in specific conditions in the
HCM city.
Application of the model proposed by the thesis in evaluating a number
of typical projects in HCM city shows very noticeable points, namely:
- When evaluating construction methods at Hang Xanh intersection,
technical criteria are considered most important, accounting for more than
half of the weight compared to the average weighted average. The beauty
criteria also account for a large proportion in the evaluation results. The
economic, and transport impact criteria account for a negligible part of the
total weighted average. From the evaluation results, Option A3- Combined
steel is considered to be the most optimal plan and there is a difference from
the plan that is applied outside the reality is to use regular I beam.

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