印度重载铁路路基设计标准研究  

Study on Indian Design Code for Heavy Haul Railway Subgrade

作　　者：贺钢[1] 蒋楚生[1] 刘孟适 曾惜 易旭鹏 HE Gang;JIANG Chusheng;LIU Mengshi;ZENG Xi;YI Xupeng(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《路基工程》2022年第3期6-9,共4页Subgrade Engineering

基　　金：中铁二院工程集团有限责任公司科技研发项目(KYY201811018-20)。

摘　　要：介绍印度规范路基填料分类,结合中国标准进行对比。研究表明:印度规范根据粒径<0.075 mm细粒含量划分的SQ1、SQ2、SQ3填料,相应的力学性质不断提高;列车动荷载显著区域按单、双层结构两种型式设计,单层结构仅设置覆盖层,双层结构由覆盖层和准备层组成;覆盖层的压实度MDD不得小于100%、二次变形模量E_(v2)最小值为100 MPa,准备层MDD最小值为98%,25.0 t轴重下的E_(v2)最低为45 MPa,30.0 t和32.5 t轴重下E_(v2)最低为60 MPa;基床厚度和压实标准均低于中国规范要求。The Indian code for the classification of subgrade filler was introduced,and comparative analysis was made with the Chinese code.The study shows that,in the Indian code,SQ1,SQ2 and SQ3 fillers,which are classified according to the content of fine particle with the diameter<0.075 mm,have the improved mechanical properties;in the area of significant train dynamic load,the type of subgrade bed may be designed to single-layer or double-layer structure,in which the single-layer structure sets blanket layer only and the double-layer structure is composed of a blanket layer and a reserve layer.The compactness MDD of the blanket layer shall not be less than 100%,and the minimum value of secondary deformation modulus E_(v2) is 100 MPa;the minimum value of MDD of the reserve layer is 98%,and the minimum E_(v2) at 25.0 t axle load is 45 MPa,the minimum E_(v2) at 30.0 t and 32.5 t axle load is 60 MPa.Both the thickness of subgrade bed and the compactness criteria fall short of the Chinese code.

关 键 词：重载铁路 印度规范 路基填料 基床结构 压实标准 

分 类 号：U213.1[交通运输工程—道路与铁道工程]