DB/T29-229-2014：建筑基坑降水工程技术规程

本规程主要内容为总则、术语和符号、基本规定、降水工程勘察、降水工程设计、降水井施工、降水运行 、封井等8章和5个附录，并附条文说明。

DBT29-229-2014······1

1 总则······10

2 术语和符号······11

2.1 术语······11

2.2 符号······13

3 基本规定······16

3.1 基坑降水工程分级······16

3.2 基坑降水工程的主要内容······16

4 降水工程勘察······19

4.1 一般规定······19

4.2 勘察孔(井) 布置······20

4.3 抽水试验······22

4.4 水文地质参数······23

5 降水工程设计······27

5.1 一般规定······27

5.2 降水技术方法选择······28

5.3 降水井布置······29

5.4 单井结构设计······31

5.5 基坑抗突涌稳定性验算······33

5.6 降水出水量计算······35

5.7 降水水位计算及预测······38

5.8 降水工程的排水要求······40

6 降水井施工······41

6.1 一般规定······41

6.2 成孔施工······41

6.3 井管安装······42

6.4 滤料投放······43

6.5 围填止水(料)施工······44

6.6 洗井······44

6.7 试抽水······46

6.8 成井验收······46

7 降水运行······48

7.1 一般规定······48

7.2 集水明排······48

7.3 降水运行及维护······49

7.4 基坑降水工程施工观测······50

8 封井······52

8.1 一般规定······13

8.2 封井施工······52

附录A 基坑开放式降水涌水量计算······54

附录B 成井施工记录表······58

附录C 成井验收记录表······59

附录D 降水运行记录表······60

附录E 基坑降水观测日报表······61

本规程用词说明······63

引用标准名录······64

条文说明······65

1 总则······69

3 基本规定······70

4 降水工程勘察······73

4.1 一般规定······73

4.2 勘察孔(井)布置······74

4.3 抽水试验······75

4.4 水文地质参数······76

5 降水工程设计······78

5.1 一般规定······78

5.2 降水技术方法选择······78

5.3 降水井布置······79

5.4 单井结构设计······79

5.5 基坑抗突涌稳定性验算······79

5.6 降水出水量计算······80

5.7 降水水位计算及预测······81

6 降水成井施工······82

6.1 一般规定······82

6.2 成孔施工······82

6.3 井管安装······83

6.4 滤料投放······84

6.5 围填止水(料)施工······84

6.6 洗井······85

6.7 试抽水······86

7 降水运行······88

7.1 一般规定······88

7.2 集水明排······88

7.3 降水运行及维护······89

7.4 基坑降水工程施工观测······89

8 封井······90

8.2 封井施工······90