DB62/T25-3118-2016：湿陷性黄土场地挤密地基技术规程

DB62T25-3118-2016······1

1 总则······8

2 术语和符号······9

2.1 术语······9

2.2 符号······10

3 基本规定······12

4 设计······13

4.1 处理范围与要求······13

4.2 有关设计参数······13

4.3 孔填料选择······16

4.4 垫层设置······16

4.5 挤密地基的效果评价······17

4.6 多桩型复合地基······17

4.7 地基土增湿······17

5 施工······19

5.1 施工准备······19

5.2 填料······21

5.3 沉管挤密与柱锤冲扩挤密施工······21

5.4 预钻孔夯扩挤密施工······23

5.5 垫层施工······25

5.6 冬、雨期施工······25

6 检验与验收······27

6.1 质量检验······27

6.2 工程验收······29

附录A 沉管（或预钻孔夯扩）挤密成孔施工记录······31

附录B 沉管挤密夯填施工记录······32

附录C 预钻孔夯扩挤密夯填施工记录······33

附录D 孔内小环刀取样器简图······34

本规程用词说明······35

引用标准名录······36

附：条文说明······37

1 总则······39

2 术语和符号······41

3 基本规定······43

4 设计······45

4.1 处理范围与要求······45

4.2 有关设计参数······45

4.3 孔填料选择······49

4.4 垫层设置······50

4.5 挤密地基的效果评价······50

4.7 地基土增湿······50

5 施工······52

5.1 施工准备······52

5.2 填料······52

5.3 沉管挤密与柱锤冲扩挤密施工······52

5.4 预钻孔夯扩挤密施工······53

6 检验与验收······54

6.1 质量检验······54