Highway subgrade design specifications

Author: Ministry of Transportation of the People's Republic of China
Publisher:
Publication Date: 2004-12-01
Features: The revision of the "Code for Highway Subgrade Design" was carried out in accordance with the spirit of the Ministry of Transportation's "Notice on Issuing the Work Plan for the Compilation and Revision of Highway Engineering Standard Norms and Quotas in 2000" (Jiaotong Highway Development [2000] No. 722) and the "Notice on Issuing the Highway Engineering Standard Norm System" (Jiaotong Highway Development [2002] No. 288). The newly revised "Code for Highway Subgrade Design" incorporates relevant content from the "Technical Specification for Design and Construction of Highway Fly Ash Embankments" (JTJ016-93), "Technical Specification for Design and Construction of Highway Soft Soil Subgrade Embankments" (JTJ017-96), "Code for Highway Drainage Design" (JTJ018-96), and "Technical Specification for the Application of Geosynthetics in Highway Engineering" (JTY019-98). Based on the original code, key revisions have been made to address prominent issues in current highway subgrade design, such as the boundaries and design principles for high-fill and deep-cut sections, slope protection, subgrade compaction standards, and the design of special subgrades. The revision emphasizes the systematic concept of highway subgrade design, as well as the design principles of soil and water conservation, environmental protection, and landscape coordination. It places importance on geological and hydrological condition surveys, and emphasizes comprehensive design in areas such as foundation treatment, fill material selection, subgrade strength and stability, slope protection, drainage systems, and construction techniques for critical sections. The revision highlights the systematic concept of highway subgrade design, as well as the design principles of soil and water conservation, environmental protection, and landscape coordination. It emphasizes geological and hydrological condition surveys, and focuses on comprehensive design in areas such as foundation treatment, fill material selection, subgrade strength and stability, slope protection, drainage systems, and construction techniques for critical sections.