Nghiên cứu một số tiêu chí kỹ thuật đối với tuyến đường bộ đang khai thác khi đề xuất thực hiện bảo trì theo hình thức hợp tác công tư PPP ở việt nam tt tiếng anh

MINISTRY OF EDUCATION AND TRAINING UNIVERSITY OF TRANSPORT AND COMMUNICATIONS PHAM VAN TOAN RESEARCH SOME TECHNICAL CRITERIA FOR THE ROUTINE ROAD IS EXPLOSION WHEN PROPOSING THE MAINTENANCE PERFORMANCE UNDER THE FORM PPP IN VIETNAM Industry: Traffic construction engineering Code: 9580205 SUMMARY OF THE THESIS AND TECHNICAL COMMENT Ha Noi - 2019 Project is completed at: University of transport and communications Instructor : Prof Dr Pham Huy Khang Prof Dr Nguyen Xuan Dao Reviewer 1: Reviewer 2: Reviewer 3: The dissertation is protected before the grassroots thesis review council meets at the University of Transport and Communications at on , 2019 Can find project at: INTRODUCE Reason to choose the topic Road traffic is an important driving force that promotes the socioeconomic development of the country Therefore, in any country, road traffic is always given priority for development and long-term development orientation Vietnam is at an early stage of industrialization and modernization In this period, the demand for investment in construction and maintenance of road traffic infrastructure system is an urgent issue In order to minimize the burden of the state budget, finding a project investment model to maintain the existing road routes in accordance with the conditions of Vietnam is a necessary, highly practical In order to study the appropriate investment model, the evaluation of technical indicators for the currently exploited road when moving to a new investment model is an essential job which not only has economic significance but also brings proper investment efficiency and bring deep scientific, practical and social significance Therefore, the topic "Researching some technical criteria for the road being exploited when proposing maintenance in the form of PPP public partnership in Vietnam" is necessary, with scientific significance and practicality in the field of research in our country today Research purposes - Research on PPP public investment investment form when maintaining for existing roads, the ability to apply in Vietnam conditions - Proposing a number of technical criteria to assess the roads being exploited as a basis for implementing PPP investment plans - Solutions for economic and financial analysis and socio-economic analysis when implementing maintenance of roads in the form of PPP Subjects and scope of research Research subjects: Three basic technical criteria for assessing the route being exploited when proposing to switch to the form of investment in maintaining PPP public relations as follows: 1) Traffic indicators of actual vehicles being exploited by the route 2) Condition of ground and pavement condition of the road being exploited; 3) Traffic safety indicator of the road being exploited Scope of research: on the national highway system being exploited Research Methodology The dissertation uses theoretical research methods, proposed analytical and assessment methods Scientific and practical significance of the thesis Scientific significance: The research results of the thesis are the contents included in the assessment of the quality of exploitation of the current roads, thereby proposing technical criteria for the roads being exploited for implementation PPP maintenance investment model on the basis of quantifying investment value and exploitation efficiency Practical significance: Maintenance investment in the form of PPP for operating roads brings great economic efficiency in the situation of investment budget capital for implementation of maintenance projects remains difficult Structure of the thesis In addition to the introduction and conclusion, the list of references, the content of the thesis structure consists of chapters: Chapter 1: Overview of road transport and maintenance works under PPP Chapter 2: The study proposes the technical criteria of the road being exploited when performing maintenance in the form of PPP Chapter 3: Economic - financial analysis and socio-economic analysis of road maintenance projects invested in the form of PPP Chapter 4: Applying the proposed technical criteria in the thesis when performing maintenance of a proposed route in the form of PPP New contributions of the thesis Currently, in the standards, design and exploitation of the road in use, there is a lack of specific instructions on the capacity of traveling, the service level and the criteria of ground and road structure for the roads being declared waterfall; Therefore, PhD students use in specific conditions of each road section to study the actual effects of geometric elements of the road such as lane width, road width and traffic factors such as ratio of occupied trucks, buses in the vehicle line, intersection factors, traffic density etc Based on the study of the above issues in depth, detailed in chapter of the thesis The PhD student proposes three technical criteria for assessing the routes in operation when proposing maintenance in the form of PPP in a scientific, specific and meaningful manner in the analysis of Economics - Finance and Socio-Economic analysis for each road section when performing maintenance in the form of PPP In addition, in parallel with the determination of technical criteria to serve as a basis for the screening of proposed routes to implement maintenance in the form of PPP, the Fellows also study and propose the contribution ratio Investor's capital and the ratio of State capital contribution (repayment of capital to investors from annual road maintenance fund) in investment in maintenance of currently exploited CHAPTER OVERVIEW OF INVESTMENT OF TRAFFIC WORKS UNDER PPP AND MAINTENANCE PPP ROADING EXPLOSION Research on investment in maintenance of roads under exploitation in the form of PPP partnership is considered an effective solution to improve capital from the Maintenance Fund and limit and optimize investment efficiency; At the same time, providing high quality public services to benefit the state and the people 1.1 Basic concepts and characteristics of PPP investment forms 1.1.1 Basics of public-private partnerships The term "public-private partnership" describes a range of possible relationships between public institutions and private organizations related to infrastructure as well as sectors other services The advantage of PPP investment is the allocation of risks to partners who are able to solve that risk in the best way and thus minimize costs and improve operational efficiency 1.1.2 Types of PPP models in practice PPP models allocate responsibilities and risks between public and private partners in different ways depending on the nature of the project, the agreement contract structure is used for projects such as: Build- andTransfer (BT): Build-Lease-and-Transfer (BLT); Build-Operate-andTransfer (BOT); Build-Own-Operate-and-Transfer (BOOT); Build-Ownand-Operate (BOO); Build-Operate-Share-Transfer (BOST); Build-OwnOperate-Share-Transfer (BOOST) is a contract signed between a state agency and an investor 1.2 The situation of PPP investment in the transport industry in the world Learn PPP investment model in the transport sector in general and PPP investment in specific road maintenance projects in the world through general surveys in some countries such as the United Kingdom and Australia, Japan ; Results achieved in some countries above 1.3 Invest PPP in transport in Vietnam 1.3.1 PPP model applied in Vietnam PPP investment model started to be applied in Vietnam from 1994 to present, mainly implemented in the form of BOT, BT and BOO investment in infrastructure, transportation, electricity and telecommunications Especially in the transport sector in the past time, PPP model has been implementing a number of investment projects on construction of road traffic infrastructure; 1.3.2 Current situation of capital sources and investment needs in the transport sector Summarize the current situation of investment capital for the transport sector in the structure of investment capital sources of the state budget as well as the support and loan capital sources from abroad On the basis of capital sources and industry development orientation in the period of 2016-2020 and looking forward to 2030 to meet the country's economic development conditions, the transportation and construction investment needs are very big; Some specific objectives include: By 2020, there are over 2,000km of expressways; completed over 600km of Ho Chi Minh road; The average speed of North-South trains is 80-90km / h for passenger trains and 50-60km / h for cargo ships; bringing the total capacity of airports to about 100 million passengers / year; The total capacity of seaports reaches about 800 million tons / year by 2020; Investment capital of the Transportation sector is about VND 1,015 billion (about USD 48 billion) of which more than VND 300,000 billion (USD 14 billion) will be mobilized from non-budget sources 1.3.3 PPP investment in traffic and some achievements Some of the achievements from attracting PPP investment in the transport sector in recent years have brought about development in the transport sector in particular, creating conditions for the socio-economic development in difficult conditions state budget Statistics of some real projects have been implemented in the past time 1.4 PPP investment in road maintenance in Vietnam 1.4.1 Current situation of network, capital and road maintenance needs - Current situation of road network in our country in terms of: + Length and scale of the route: + Status of road surface: + About geographic and regional distribution: The road network is distributed reasonably, the average density is 0.85 km / km2 and 3.21 km / 1,000 people For the national highway system alone, the density reaches 0.051 km / km2, in which the Red River Delta region has the highest density of 0.099 km / km2, the Central region is 0.068 km / km2; The Central Highlands is the region with the lowest density of 0.0374 km / km2 + Some results and comparison of some technical indicators compared with other countries in the world: About length and road density Road network structure About capacity of road exploitation Regarding the structure of maintenance capital and construction investment Some indicators of traffic safety 12 CHAPTER STUDY OF TECHNICAL RECOMMENDATIONS OF THE ROAD IS EXPLOSION WHEN IMPLEMENTING MAINTENANCE UNDER THE PPP FORM 2.1 The technical criteria of the road being exploited in general and when implementing the road maintenance project in the form of PPP The technical criteria for assessing the quality of the road being exploited are the following evaluation criteria: - Criteria for evaluation of road surfaces; - Criteria for evaluating roadbeds; - Criteria for evaluating works on the route; - Criteria for operation and exploitation; - Criteria for driving conditions and traffic safety; Therefore, the evaluation of technical indicators for a line in operation to prepare for maintenance in the form of PPP is a necessary job which is not only economically meaningful but also effective in working proper maintenance; At the same time, bring deep social meaning Through practical issues mentioned above, the determination of technical criteria to evaluate and propose investment in the form of PPP is a core issue so the thesis proposed 03 technical criteria version to evaluate the currently operating route when proposing maintenance under PPP public-private partnership as follows: 1) Criteria for capacity to travel and service level in service 2) Criteria for quality of ground, road surface are being exploited 3) Traffic safety criteria are being exploited 2.2 Criteria for capacity to travel and service level of the service in operation 2.2.1 Definition of travel capacity and service level of the road being exploited - Highway Capacity: Fellows conduct research on the concept of traveling capacity according to the current regulations in Vietnam (According to TCVN 4054: 2005; according to QCVN-4: 2016 / BXD and according to TCXDVN 104: 2007) and refer to the definition of "Highway 13 Capacity Manual" - Level of service (Level of serice - LOS): according to regulations and documents in Vietnam, the concept of service level of the road is not mentioned yet so the PhD student studies the concept of "level of service case "according to 1994 AASHTO, AASHTO 2012 and HCM A good level of service is called a factor using a capacity to travel: a measure of the operating quality of a traffic flow, which a driver and passenger are aware of * Service level is divided into different levels, denoted by A, B, C, D, E, F At level A - the best service quality and the F level - the poorest service quality 2.2.2 The need to assess the capacity of travel and service level when proposing road maintenance in the form of PPP - Roads are being exploited, depending on the function of the route, the type of road, the design criteria, the service level regulations are A, B, C, D, E or F Over time due to storage the number of vehicles increased, thus, the criteria for traveling capacity and the level of service change; therefore, it is necessary to identify these indicators as a basis for proper maintenance plans - Currently, in the standards, design and exploitation of the road in use, there is a lack of specific instructions on the capacity of service and the level of service for the routes being used in the specific conditions of each section The research path has a practical effect on the geometric elements of the road such as lane width, road width and traffic factors such as the proportion of trucks occupied, buses in the vehicle line, the elements of buttons traffic, traffic density etc In the dissertation, the PhD student has studied in depth the above issues 2.2.3 How to determine the capacity for travel Research and calculate the capacity of traveling on 03 aspects: 1) Maximum travel capacity: introduction and guidance for calculation according to the formulas of the former Soviet Union, the US, France and according to Vietnamese regulations 14 2) Computing capacity: introduce formula of calculation, interpretation and application in Vietnam conditions with reference to the conditions of service of the route 3) Actual travel capacity takes into account the specific conditions of geometric factors, vehicle flow factors, truck components and buses, which account for a proportion of traffic Determination analysis The necessity to determine actual travel capacity in road maintenance projects through which the calculation of Highway Capacity Manual (HCM) is conducted - Passage capacity and service level of branch roads and branch lines - Determine for two-lane car routes - Travel capacity and service level at traffic lights with signal lights 2.3 Criteria for quality of ground and road surfaces are being exploited for road maintenance 2.3.1 Quality of exploitation of the ground and the road surface The current quality of the route depends on the quality of the road surface and the road base from the viewpoint of the pavement structure as a general structure, not only the surface and foundation but also the ground and the road surface Therefore, in the process of exploiting the pavement structure, the load capacity will gradually decrease under the effect of vehicle load and natural factors, then including the pavement structure will be reduced in intensity and level service leads to failure Therefore, it is necessary to develop methods to assess the intensity of the ground, road surface, and the remaining life of the structure for maintenance work The content of this chapter focuses on analyzing methods of analyzing and assessing the situation of ground surface exploitation in the world and in Vietnam to propose the most appropriate method suitable to the conditions of Vietnam 2.3.2 Definition of the life of soft pavement structure An overview of road life, traditionally, is defined based solely on the structural status and functional condition of the road surface During that period of time the structural and functional status of the pavement is believed to be able to be maintained within the specified limits corresponding to 15 specific field conditions and assuming regular maintenance and preventive maintenance Properly done There are many definitions of longevity and life span of soft pavement structures The definitions of the life expectancy and life expectancy of the soft road structure are as follows: - Life span of pavement structure According to the transport terminology of the 2009 AASHTO (The 2009 AASHTO Transportation Glossary) there are definitions of life span and service life of the pavement structure analyzed in detail in the thesis The remaining life of the pavement structure The remaining life of Remaining service life (RSL) is the remaining time that a new pavement structure is constructed or maintained for the first time before it can reach the end service capacity Its the same, or reaches the status of need to perform major maintenance Figure 2.8 and Figure 2.9 describe the definition of the remaining life of the road surface according to IRI and PCI criteria 2.3.3 Assessing the condition of road surface for maintenance work In the routine maintenance technical standards for road TCCS 07-2013, it is recommended to use the PCI road surface indicator and evaluate the road surface condition according to ASTM: D6433-07 by gradual deduction However, the PCI index only assesses the condition of the road surface but has not considered the remaining intensity of the structure, this issue needs additional research of the thesis Figure 2.19 is a diagram to assess the condition of the road surface from the type of failure, the extent and the amount of damage 16 - Using the results of the FWD test assesses the remaining life of the soft pavement structure - Determine the elastic modulus of the roadbed - Evaluate the condition of pavement structure - Determination of CF conditions - Determine the remaining life of the road surface - Proposing methods of using structural status index (SCI) to determine the remaining life, selecting soft road maintenance measures 2.4 Evaluate conditions that affect driving safety In order to assess the conditions affecting the safety of the Fellows, research on the following aspects: - Overview - Flow factor and vehicle components - The number of lanes and the separation of cars in opposite directions in each direction - The width of the vehicle component - Vision distance factor - Vertical slope factor - Curvature radius on the map Conclusion chapter To make a plan to invest in maintenance projects on the road being exploited in the form of PPP public partnership, the thesis proposes to implement: a Determining the traveling capacity and service level of the currently exploited route: - For the roads being exploited to ensure the criteria: A-level free flow, very high speed, the coefficient of using Z