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UDC
中华人民共和国行业标准
TB1002520XX
PJ12720XX
铁路路基支挡结构设计规范
Codefordesignofretainingstructure
ofrailwaysubgrade
（征求意见稿）
20XX-00-00发布20XX-00-00实施
国家铁路局发布
目录
1总则······························································································1
2术语和符号·····················································································2
2.1术语2
2.2符号8
3基本规定·······················································································11
3.1一般规定11
3.2极限状态设计规定13
3.3支挡结构选择19
4作用及作用组合·············································································21
4.1一般规定21
4.2永久作用22
4.3可变作用25
4.4偶然作用28
5材料及性能····················································································29
5.1一般规定29
5.2混凝土31
5.3钢材32
5.4土工合成材料34
5.5填料和岩土参数35
6重力式挡土墙················································································36
6.1一般规定36
6.2设计与计算38
6.3构造要求45
7悬臂式和扶壁式挡土墙····································································48
7.1一般规定48
7.2设计与计算50
7.3构造要求56
8槽型挡土墙····················································································59
8.1一般规定59
8.2设计与计算61
8.3构造要求68
9加筋土挡土墙················································································69
9.1一般规定69
9.2设计与计算70
9.3构造要求76
10土钉墙························································································77
10.1一般规定77
10.2设计与计算79
10.3构造要求83
11锚杆挡土墙························
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