内容简介
DB13 (J) /T 8369-2020备案号∶ J15355-2020
城市轨道交通基坑内支撑支护技术标准
Technical standard for supporting in foundation pit of urban rail transit
2020-11-01 实施
2020-08-28 发布
目次
1 总则······································································ 1
2 术语和符号····························································· 2
2.1 术语································································· 2
2.2 符号································································· 4
3 基本规定································································ 7
3.1 设计原则····························································7
3.2 作用······························································· 12
3.3
内支撑支护结构形式············································· 13
3.4 勘察、设计和施工················································14
4 勘察·····································································16
4.1 一般规定·························································· 16
4.2 周边环境调查····················································· 16
4.3 岩土工程勘察····················································· 18
4.4 地下水勘察························································20
4.5 成果······························································· 23
5 设计·····································································25
5.1 一般规定·························································· 25
5.2 土压力和水压力计算············································· 26
5.3 材料选用及基本构造要求········································ 33
5.4 挡土结构设计····················································· 36
5.5 内支撑体系结构设计············································· 45
5.6 地下水控制设计·················································· 57
6 施工·····································································65
6.1 一般规定·························································· 65
6.2 材料进场验收····················································· 65
6.3 钢筋混凝土结构构件施工········································ 66
6.4 基坑开挖·························································· 67
6.5 内支撑体系施工和拆除···········································67
7 监测·····································································75
7.1 一般规定·························································· 75
7.2 监测项目·························································· 76
7.3 监测点布置和监测精度···········································80
7.4 监测频率和报警·················································· 87
8 检验和验收····························································95
8.1 一般规定·························································· 95
8.2 检验······························································· 95
8.3 验收······························································· 99
9 风险控制····························································· 101
9.1 一般规定·························································101
9.2 风险分级·························································101
9.3 风险控制和处理措施············································102
附录A 基坑工程周边环境调查···································· 105
附录B 极限平衡法····················································114
附录C 圆形截面混凝土支护桩的承载力计算·················· 119
附录D 钢管支撑常用规格技术参数表··························· 123
附录E 支撑结构常用节点做法参考图··························· 124
本标准用词说明·························································131
引用标准名录····························································132
附：条文说明····························································133
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