1 General Provisions 2 Terms and Symbols 2.1 Terms 2.2 Symbols 3 General Substructure 3.1 General requirements 3.2 Roadbed 3.3 Fill embankment 3.4 Cutting substructure 3.5 Boundary region treatment between the excavation and fill substructure 3.6 High embankment and steep slope embankment 3.7 High slope in cutting 3.8 Rock embankment 3.9 Light weight material embankment 3.10 Embankment with industrial waste material 3.11 Borrow pits and spoil sites substructure 4 Substructure Drainage 4.1 General requirements 4.2 Surface drainage 4.3 Underground drainage 5 Substructure Protection and Retaining Structures 5.1 General requirements 5.2 Slope protection 5.3 Substructure protection along riverside 5.4 Retaining wall 5.5 Slope anchorage 5.6 Soil nailing 5.7 Slide resistance pile 6 Substructure Widening and Reconstruction 6.1 General requirements 6.2 Investigation and evaluation of the existing substructure 6.3 Substructure widening and reconstruction of Class-2 and lower-class highways 6.4 Widening and reconstruction of existing substructure for motorways or Class-1 highways 7 Special Substructure 7.1 General requirements 7.2 Substructure in landslide areas 7.3 Substructure in rockfall and talus sections 7.4 Substructure in the section backfilled with rocks 7.5 Substructure m the section of debris flow 7.6 Substructure in karst area 7.7 Substructure in the area of soft soil 7.8 Substructure in red clay and high liquid limit soil area 7.9 Substructure in expansive soil area 7.10 Substructure in loess region 7.11 Substructure in saline soil area 7.12 Substructure in perennially frozen area 7.13 Substructure In wind drift sand area 7.14 Substructure in snow disaster area 7.15 Substructure in ice drift section 7.16 Substructure in mined-out area
7.17 Substructure in coastal area 7.18 Substructure in reservoir area 7.19 Substructure in seasonally frozen soil area Appendix A Standard Test Method of Dynamic Resilient Modulus of Substructure Soil Appendix B Dynamic Resilient Modulus of Substructure Soil Appendix C Method for Estimating the Equilibrium Moisture of Substructure Appendix D Range of Humidity Adjustment Coefficient of Substructure Resilient Modulus Appendix E Rock Classification for Rock Side Slope Appendix F Monitoring Content and Items of Substructure Appendix G Material Strength Requirements of Roadbed Drainage Protection and Retaining Structures Appendix H Design and Calculation of Retaining Wall Appendix J Classification of Permafrost according to Highway Engineering Wording Explanation for the Specifications Background to Provisions 1 General Provisions 3 General Substructure 4 Substructure Drainage 5 Substructure Protection and Retaining Structures 6 Substructure Widening and Reconstruction 7 Special Substructure Additional References for English Version Technical Terms in Chinese and English
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