DB33/T1012-2021：挤扩支盘混凝土灌注桩技术规程

DB33-T1012-2021······1

1 总则······9

2 术语和符号······10

2.1 术语······10

2.2 符号······10

3 勘察······14

4 设计······15

4.1 一般规定······15

4.2 支和盘布置······16

4.3 计算······17

4.4 构造······23

5 施工······25

5.1 一般规定······25

5.2 桩身成孔······25

5.3 支盘挤扩······27

5.4 成桩······29

6 验收······31

6.1 一般规定······31

6.2 主控项目······31

6.3 一般项目······32

附录A 单桩几何参数及桩身竖向抗压承载力······34

附录B 支盘桩竖向承载土层阻力特征值······35

附录C 支盘桩施工工艺流程······37

附录D 土层物理力学指标与挤扩首压参考值······38

附录E 支盘桩施工记录表······39

附录F 盘腔直径检测方法······40

附录G 支盘桩施工质量检验标准······42

附录H 支盘桩检验批质量验收记录······44

本规程用词说明······46

引用标准名录······47