DB62/T25-3099-2015：预应力混凝土管桩基础技术规程

DB62T25-3099-2015······1

1 总则······7

2 术语和符号······8

2.1 术语······8

2.2 符号······8

3 基本规定······11

4 岩土工程勘察······13

5 规格和质量······15

5.1 一般规定······15

5.2 原材料······15

5.3 构造······16

5.4 管桩产品质量要求······17

6 管桩基础设计······19

6.1 一般规定······19

6.2 桩顶作用效应计算······20

6.3 桩基承载力计算······21

6.4 桩身裂缝控制······32

6.5 管桩沉降计算······33

7 管桩基础施工······35

7.1 一般规定······35

7.2 管桩吊运和堆放······36

7.3 接桩······36

7.4 锤击法沉桩······37

7.5 静压法沉桩······39

8 管桩工程质量检验和验收······42

8.1 一般规定······42

8.2 施工前检验······42

8.3 施工检验······42

8.4 施工后检验······43

8.5 验收······44

附录A 管桩基本尺寸······45

附录B 管桩尺寸允许偏差······47

附录C 管桩外观质量要求······48

附录D 管桩抗裂弯矩、极限弯矩······49

附录E 管桩抗剪性能······51

附录F 管桩质量检验标准······53

附录G 管桩打桩设备的选用······55

附录H 单桩竖向静载荷试验要点······59

附录J 单桩水平载荷试验要点······62

本规程用词说明······66

引用标准名录······67

附:条文说明······68

1 总则······70

3 基本规定······72

4 岩土工程勘察······74

5 规格和质量······76

5.1 一般规定······76

6 管桩基础设计······77

6.1 一般规定······77

6.2 桩顶作用效应计算······77

6.3 桩基承载力计算······78

6.5 管桩沉降计算······79

7 管桩基础施工······80

7.1 一般规定······80

7.2 管桩吊运和堆放······81

7.3 接桩······81

7.4 锤击法沉桩······81

7.5 静压法沉桩······81

8 管桩工程质量检验和验收······83

8.1 一般规定······83

8.4 施工后检验······83