DB62/T3242-2023：地螺丝微型钢管桩技术标准

DB62/T3242-2023······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 一般规定······16

3.2 基本资料······18

3.3 桩的布置······20

3.4 特殊条件下的桩基······21

3.5 耐久性规定······24

4 桩基构造······26

4.1 基桩构造······26

4.2 承台构造······28

5 桩基计算······29

5.1 桩顶作用效应计算······29

5.2 桩基竖向承载力计算······30

5.3 单桩竖向极限承载力计算······31

5.4 特殊条件下桩基竖向承载力计算······35

5.5 桩基竖向抗拔承载力计算······39

5.6 桩基抗震计算······41

5.7 桩基沉降计算······43

5.8 桩基水平承载力计算······44

5.9 桩身承载力计算······47

5.10 承台计算······48

6 桩基施工······49

6.1 一般规定······49

6.2 桩基施工······50

6.3 安全施工······54

6.4 环境保护······55

7 桩基工程质量检验和验收······57

7.1 一般规定······57

7.2 施工前检验······57

7.3 施工检验······58

7.4 施工后检验······58

7.5 验收资料······59

附录A 地螺丝微型钢管桩类型和适用岩土条件······61

附录B 地螺丝微型钢管桩桩身构造图······62

附录C 桩顶部常用连接方式图······63

附录D 地螺丝微型钢管桩尺寸规格表······64

附录E 桩的极限侧阻力和端阻力标准值······66

附录F 地螺丝微型钢管桩产品检验记录表······69

附录G 地螺丝微型钢管桩施工记录表······70

本标准用词说明······71

引用标准名录······72

附：条文说明······74

1 总则······78

2 术语和符号······80

3 基本规定······81

3.1 一般规定······81

3.2 基本资料······84

3.3 桩的布置······84

3.4 特殊条件下的桩基······84

3.5 耐久性规定······87

4 桩基构造······89

4.1 基桩构造······89

5 桩基计算······91

5.1 桩顶作用效应计算······91

5.2 桩基竖向承载力计算······91

5.3 单桩竖向极限承载力计算······91

5.4 特殊条件下桩基竖向承载力计算······94

5.5 桩基竖向抗拔承载力计算······96

5.6 桩基抗震计算······97

5.7 桩基沉降计算······97

5.8 桩基水平承载力计算······98

5.9 桩身承载力计算······98

5.10 承台计算······99

6 桩基施工······100

6.1 一般规定······100

6.2 桩基施工······102

6.3 安全施工······104

6.4 环境保护······104

7 桩基工程质量检验和验收······105

7.1 一般规定······105

7.2 施工前检验······105

7.3 施工检验······105

7.4 施工后检验······106

7.5 验收资料······106