DB/T29-251-2018：城市轨道交通冻结法设计施工技术规程

DBT29-251-2018······1

目次······7

1 总则······13

2 术语······14

3 基础资料······18

4 联络通道地层冻结设计······20

4.1 一般规定······20

4.2 冻结壁设计······22

4.3 制冷系统设计······27

5 联络通道冻结孔与冻结器······32

5.1 冻结孔······32

5.2 冻结管······34

5.3 供液管······35

5.4 质量验收······36

6 联络通道冷冻站······37

6.1 冷冻站位置······37

6.2 冷冻站安装······37

6.3 冷冻站运转······39

6.4 停冻······40

7 联络通道冻结壁检测与判断······41

7.1 测温孔布置······41

7.2 测温孔检测······41

7.3 泄压孔及其它检测工作······42

7.4 质量验收······43

8 联络通道冻结工程收尾工作······45

8.1 冷冻站拆除······45

8.2 冻结管充填······45

8.3 技术档案······46

9 联络通道开挖与构筑······48

9.1 隧道支撑和防护门······48

9.2 开挖准备及试挖······49

9.3 正式开挖······51

9.4 质量控制与验收······52

9.5 结构施工······53

9.6 衬砌后充填注浆和地层融沉注浆······53

10 盾构始发与接收加固······55

10.1 加固冻结设计······55

10.2 冻结加固体的枪测与判断······59

10.3 施工······60

10.4 融沉注浆······62

10.5 技术档案······63

11 周边环境监控量测······64

11.1 基本要求······64

11.2 监测项目及要求······64

12 应急管理······66

附录A 盾构始发接收地层加固冻结加固体温度场解析解及厚度和平均温度测算方法······68

附录B 市区及滨海新区土层热物理特性指标和人工冻土物理力学特性指标表······79

本规程用词说明······86

引用标准名录······87

条文说明······88

目次······89

1 总则······91

3 基础资料······92

4 联络通道地层冻结设计······93

4.1 一般规定······93

4.2 冻结壁设计······93

4.3 制冷系统设计······96

5 联络通道冻结孔与冻结器······97

5.1 冻结孔······97

5.2 冻结管······98

5.3 供液管······98

5.4 质量验收······99

7 联络通道冻结壁检测与判断······100

7.1 测温孔布置······100

7.2 测温孔检测······100

7.3 泄压孔及其它检测工作······101

7.4 质量验收······101

9 联络通道开挖与构筑······102

9.1 隧道支撑和防护门······102

9.2 开挖准备及试挖······103

9.3 正式开挖······103

9.4 质量控制和验收······104

9.6 衬砌后充填注浆和地层融沉注浆······104

10 盾构始发与接收加固······105

10.1 加固冻结设计······105

10.3 施工······105