CJJ/T74-2020：城镇地道桥顶进施工及验收标准

CJJT74-2020······1

1 总则······11

2 术语和符号······12

2.1 术语······12

2.2 符号······13

3 基本规定······16

4 顶进施工方法······17

4.1 一般规定······17

4.2 一次顶进法······17

4.3 中继间法······18

4.4 顶拉法和半顶拉法······18

4.5 机械切削式顶进法······19

5 顶进工艺设计······20

5.1 现场调查······20

5.2 排水与降水······20

5.3 工作坑······21

5.4 滑板······21

5.5 润滑隔离层······22

5.6 顶力计算······23

5.7 后背······25

5.8 钢刃脚及中平台······26

5.9 顶进设备······27

5.10 机械切削式顶进法工艺设计······29

6 顶进施工······32

6.1 施工测量······32

6.2 施工排水与降水······32

6.3 工作坑开挖与支护······33

6.4 滑板施工······33

6.5 润滑隔离层施工······34

6.6 后背施工······34

6.7 桥体预制······35

6.8 顶进设备安装······37

6.9 顶进作业······37

6.10 防水······42

7 既有线路加固······43

7.1 铁路线路加固······43

7.2 土体加固······45

8 监测······47

9 工程质量检验与验收······49

9.1 一般规定······49

9.2 工作坑······50

9.3 滑板······51

9.4 箱形节段预制模板······52

9.5 节段预制混凝土······53

9.6 箱涵顶进······54

9.7 箱形节段顶进······55

9.8 防水······55

附录A 板桩墙后背墙计算及稳定性验算······58

附录B 顶进施工记录表······60

本标准用词说明······62

引用标准名录······63

附：条文说明······64

1 总则······68

2 术语和符号······69

2.1 术语······69

3 基本规定······70

4 顶进施工方法······72

4.1 一般规定······72

4.2 一次顶进法······72

4.3 中继间法······72

4.4 顶拉法和半顶拉法······73

4.5 机械切削式顶进法······73

5 顶进工艺设计······74

5.1 现场调查······74

5.2 排水与降水······74

5.3 工作坑······75

5.4 滑板······75

5.5 润滑隔离层······76

5.6 顶力计算······76

5.7 后背······77

5.8 钢刃脚及中平台······78

5.9 顶进设备······79

6 顶进施工······80

6.1 施工测量······80

6.2 施工排水与降水······80

6.3 工作坑开挖与支护······80

6.4 滑板施工······80

6.5 润滑隔离层施工······81

6.6 后背施工······81

6.7 桥体预制······81

6.8 顶进设备安装······82

6.9 顶进作业······82

6.10 防水······85

7 既有线路加固······86

7.1 铁路线路加固······86

7.2 土体加固······87

8 监测······91

9 工程质量检查与验收······92

9.1 一般规定······92