Find the latest design codes for asphalt pavement and cement concrete pavement

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Standard number: JTG D50-2006

Standard name: Highway asphalt pavement design code.

Standard Status: Active.

Alternate case: JTJ 014-1997

Date of implementation: 2007-1-1

Promulgating Departments:Ministry of Communications of the People's Republic of China.

Brief introduction: This standard is applicable to the new and reconstructed design of asphalt pavement at all levels of highways, and special highways can be used as a reference.

Standard number: JTG D 40-2002

Standard Name: Highway Cement Concrete Pavement Design Code (with Clause Description) Standard Status: Current.

Alternate case: JTJ 012-1994

Date of implementation: June 1, 2003

Promulgating Departments:Ministry of Communications of the People's Republic of China.

Brief introduction: In order to meet the needs of transportation development and highway construction, improve the design quality and technical level of cement concrete pavement, and ensure the safety and reliability of the project, economic and reasonable, this specification is formulated.

This code applies to the design of cement concrete pavement for new and reconstructed highways.

The following are the design specifications for asphalt roads and cement concrete pavements:

Highway Asphalt Pavement Design Code is one of the series of books on the understanding and application of highway engineering standards and specifications, and the supporting book of "Highway Asphalt Pavement Design Code" is written by the author of the specification, which is divided into two articles. The first part introduces the background of the compilation of the specification and the interpretation of difficult provisions; The next part is a special research report on the specification for in-depth study by scientific research designers.

Legal analysis: In order to meet the needs of highway construction and development, make asphalt pavement meet the use requirements, ensure the quality of pavement, and improve the durability of the project, the design specifications for asphalt concrete pavement are formulated.

Legal basis: Road Traffic Safety Law of the People's Republic of China Article 29 The planning, design and construction of roads, parking lots and road supporting facilities shall comply with the requirements of road traffic safety and smoothness, and shall be adjusted in a timely manner according to traffic demand. The traffic management department of the public security organ finds that there are frequent traffic accidents on the road that has been put into use, or the parking lot and road supporting facilities are in the heart of the serious traffic safety hazard of Tsai Xiaoye, should be reported to the local people in a timely manner, and put forward suggestions to prevent traffic accidents and eliminate the hidden dangers of caution, and the local people should make a decision in a timely manner.

In order to meet the needs of highway construction and development, make asphalt pavement meet the use requirements, ensure pavement quality, improve engineering durability, and formulate asphalt concrete pavement design specifications.

Legal basis: Road Traffic Safety Law of the People's Republic of China Article 29 The planning, design and construction of roads, parking lots and road supporting facilities shall comply with the requirements of road traffic safety and smoothness, and shall be adjusted in a timely manner according to traffic demand. If the traffic management department of the public security organ finds that there are frequent traffic accidents on the road that has been put into use, or there are serious traffic safety hazards in parking lots and road supporting facilities, it shall report to the local people in a timely manner, and put forward suggestions to prevent traffic accidents and eliminate hidden dangers, and the local people shall make a decision in a timely manner.

Since the release and implementation of the design code for highway cement concrete pavement (JTG D40-2002), China's cement concrete pavement has made great development, accumulated rich experience, and achieved many research results, so that the technology of cement concrete pavement has been improved to a new level. To this end, it is necessary to revise the original specification to improve the technical level of cement concrete pavement

The use quality and design quality ensure that the project is safe, reliable, economical and reasonable, and meet the needs of China's transportation development and highway construction.

Want. According to the Ministry of Communications's "Notice on Issuing the 2007 Highway Engineering Revision Project Plan" (Jiao Lu Fa [2007] 378

No.) to revise this specification.

The revised specification is divided into 8 chapters and 5 appendices.

The main contents include the combination design and thickness design of cement concrete pavement structure.

Calculation, joint design, concrete surface layer reinforcement design and construction of the layer structure, etc. In this revision, the design standard for the ultimate fracture of concrete slab and the fatigue fracture design standard for lean concrete and RCC base are added, and the extremely heavy traffic load level is added to facilitate the consideration of special vehicles and special road structure design; Improved joint design and selection of caulking materials; The calculation formulas of crack spacing and crack width of continuous reinforcement were improved. The rating standards for the amount of misalignment and the load transfer capacity of the concrete slab have been improved; The material test method was improved, and the empirical reference values of material design parameters were supplemented.

In order to meet the needs of transportation development and highway construction, improve the technical level and use quality of cement concrete pavement.

Design quality, to ensure that the project is safe, reliable, economical and reasonable, this specification is formulated.

This code is applicable to the design of cement concrete pavement for new and reconstructed highways at all levels.

The selection of cement concrete pavement should be based on the use task, nature and requirements of the highway, combined with the climate, hydrology and hydrology of the dust-covered land

Geology, materials, construction technical conditions and engineering practical experience, as well as environmental protection requirements, etc., are determined through technical and economic analysis.

The design of cement concrete pavement includes structural combination design, structural layer thickness design, material design, and joint structure design.

Calculation, reinforcement configuration design and technical and economic demonstration of the design scheme.

The cement concrete pavement structure shall be undertaken within the design reference period according to the specified safety level and target reliability requirements.

Affected by the expected traffic load of the lifting bridge, and adapt to the natural environment in which it is located, to meet the predetermined performance requirements.

In addition to the design of cement concrete pavement should comply with this code, it should also comply with the provisions of the current national standards.

Highway Cement Concrete Pavement Design Code is a book published by the People's Communications Publishing House in 2011, and the author is CCCC Highway Planning and Design Institute. The following is a brief introduction to the "Highway Cement Concrete Pavement Design Code".

Introduction. Since the release and implementation of the Code for the Design of Highway Cement Concrete Pavement (JTGD40-2002) (hereinafter referred to as the original specification), it has played an important role in guiding the design of highway cement concrete pavement in China and ensuring the quality of the pavement. With the development of highway construction in China, highway engineering and technical personnel have accumulated rich experience in cement concrete pavement construction, and have achieved many research results, the technical level of cement concrete pavement has been greatly improved, and some technical indicators in the original specification have not met the needs.

According to the Ministry of Transport Wang Yu (formerly the Ministry of Communications) "Notice on Issuing the 2007 Highway Engineering Revision Project Plan" (Jiao Lu Fa [2007] No. 378) requirements, by the CCCC Highway Planning and Design Institute **** as the editor-in-chief, responsible for the revision of the original specification.

At present, the latest version of the "Highway Cement Concrete Pavement Design Code" is JTG D40-2011, which has been implemented since December 1, 2011, and the original "Highway Cement Concrete Pavement Design Code" JTG D40-2002 version is abolished at the same time.

List of works. 1 General.

2 Terms and Symbols.

Term. Symbol.

3 Design parameters.

4. Structural combination design.

General provisions. Roadbed. cushions.

Base and subbase.

surface layer. Shoulder.

Pavement drainage. 5 Seam design.

General provisions. The above is the introduction of the content introduction and the catalogue of works made by the construction network for the "Code for the Design of Highway Cement Concrete Pavement".

Legal analysis: stipulates: 1. Technical requirements for raw materials, mix ratio and auxiliary materials used in cement concrete pavement; 2. Technical requirements for pavement concrete mixing and transportation; 3. At present, the five construction methods (sliding form, track, rolling, three-roller shaft excavation, and small machine construction) used in the construction of cement concrete pavement in China are all technological links; 4. Construction methods and technologies of new cement concrete pavement structure forms (reinforced opening hall concrete, steel fiber reinforced concrete pavement and bridge deck, etc.); 5. Technical requirements for joint construction, anti-skid structure construction and construction under special climatic conditions; 6. Cement concrete pavement construction quality management, inspection and acceptance, and safe production.

Legal basis: Article 52 of the Construction Law of the People's Republic of China The quality of survey, design and construction of construction projects must meet the requirements of the relevant national safety standards for construction projects, and the specific management measures shall be stipulated by the People's Republic of China. When the national standards for the safety of construction projects cannot meet the requirements for ensuring construction safety, they shall be revised in a timely manner.

Legal analysis: stipulates: 1. Technical requirements for raw materials, mix ratio and auxiliary materials used in cement concrete pavement; 2. Technical requirements for pavement concrete mixing and transportation; 3. At present, the five construction methods (sliding form, track, rolling, three-roller shaft, and small machine construction) used in the construction of cement concrete pavement in China are all technological links; 4. Construction methods and technologies of newly buried cherry blossom-shaped cement stool concrete pavement structure form (reinforced concrete, steel fiber reinforced concrete pavement and bridge deck, etc.); 5. Technical requirements for joint construction, anti-skid structure construction, bending clusters and special climatic conditions; 6. Cement concrete pavement construction quality management, inspection and acceptance, and safe production.

Legal basis: Article 52 of the Construction Law of the People's Republic of China The quality of survey, design and construction of construction projects must meet the requirements of the relevant national safety standards for construction projects, and the specific management measures shall be stipulated by the People's Republic of China. When the national standards for the safety of construction projects cannot meet the requirements of ensuring construction safety, they shall be revised in a timely manner.