CJJT74-2020······1

1 總則······11

2 術語和符號······12

2.1 術語······12

2.2 符號······13

3 基本規定······16

4 頂進施工方法······17

4.1 一般規定······17

4.2 一次頂進法······17

4.3 中繼間法······18

4.4 頂拉法和半頂拉法······18

4.5 機械切削式頂進法······19

5 頂進工藝設計······20

5.1 現場調查······20

5.2 排水與降水······20

5.3 工作坑······21

5.4 滑板······21

5.5 潤滑隔離層······22

5.6 頂力計算······23

5.7 后背······25

5.8 鋼刃腳及中平臺······26

5.9 頂進設備······27

5.10 機械切削式頂進法工藝設計······29

6 頂進施工······32

6.1 施工測量······32

6.2 施工排水與降水······32

6.3 工作坑開挖與支護······33

6.4 滑板施工······33

6.5 潤滑隔離層施工······34

6.6 后背施工······34

6.7 橋體預制······35

6.8 頂進設備安裝······37

6.9 頂進作業······37

6.10 防水······42

7 既有線路加固······43

7.1 鐵路線路加固······43

7.2 土體加固······45

8 監測······47

9 工程質量檢驗與驗收······49

9.1 一般規定······49

9.2 工作坑······50

9.3 滑板······51

9.4 箱形節段預制模板······52

9.5 節段預制混凝土······53

9.6 箱涵頂進······54

9.7 箱形節段頂進······55

9.8 防水······55

附錄A 板樁墻后背墻計算及穩定性驗算······58

附錄B 頂進施工記錄表······60

本標準用詞說明······62

引用標準名錄······63

附：條文說明······64

1 總則······68

2 術語和符號······69

2.1 術語······69

3 基本規定······70

4 頂進施工方法······72

4.1 一般規定······72

4.2 一次頂進法······72

4.3 中繼間法······72

4.4 頂拉法和半頂拉法······73

4.5 機械切削式頂進法······73

5 頂進工藝設計······74

5.1 現場調查······74

5.2 排水與降水······74

5.3 工作坑······75

5.4 滑板······75

5.5 潤滑隔離層······76

5.6 頂力計算······76

5.7 后背······77

5.8 鋼刃腳及中平臺······78

5.9 頂進設備······79

6 頂進施工······80

6.1 施工測量······80

6.2 施工排水與降水······80

6.3 工作坑開挖與支護······80

6.4 滑板施工······80

6.5 潤滑隔離層施工······81

6.6 后背施工······81

6.7 橋體預制······81

6.8 頂進設備安裝······82

6.9 頂進作業······82

6.10 防水······85

7 既有線路加固······86

7.1 鐵路線路加固······86

7.2 土體加固······87

8 監測······91

9 工程質量檢查與驗收······92

9.1 一般規定······92