ICS 01.040.93 CCS P30/39 32 江 苏 省 地 方 标 准 DB32/T 4285 -2022 代替 DGJ32/TJ223—2017 预应力混凝土空心方桩基础技术规程 Technical specification for prestressed concrete spun square pile foundation 2022-06-13 发布 2022-12-01 实施 江苏省市场监督管理局 江苏省住房和城乡建设厅 发布 DB32/T 4285-2022 目 次 前 言 .............................................................................. III 1 范围 ................................................................................ 1 2 规范性引用文件 ...................................................................... 1 3 术语和定义 .......................................................................... 2 3.1 术语 .......................................................................... 2 3.2 定义 .......................................................................... 4 4 空心方桩的分类 ...................................................................... 6 5 空心方桩基础设计 .................................................................... 7 5.1 5.2 5.3 5.4 5.5 一般规定 ...................................................................... 7 空心方桩的适用范围、选用与布置 ................................................ 8 空心方桩基础构造 ............................................................. 10 承压空心方桩基础设计 ......................................................... 13 抗拔空心方桩基础设计 ......................................................... 17 6 空心方桩的制作、构造和质量要求 .................................................... 20 6.1 原材料 ....................................................................... 20 6.2 构造和质量要求 ............................................................... 23 7 空心方桩基础施工 ................................................................... 26 7.1 一般规定 ...................................................................... 7.2 装卸和堆放 ................................................................... 7.3 接桩与截桩 ................................................................... 7.4 锤击法沉桩施工 ............................................................... 7.5 静压法沉桩施工 ............................................................... 7.6 送桩 ......................................................................... 7.7 基坑开挖与回填 ............................................................... 26 28 29 30 32 34 34 8 检验和验收 ......................................................................... 35 8.1 8.2 8.3 8.4 一般规定 ..................................................................... 施工前检验 ................................................................... 施工过程检验 ................................................................. 施工后检验 ................................................................... 35 37 37 38 附 录 A .............................................................................. 41 预应力混凝土空心方桩配筋及力学性能参考表 ............................................. 41 附 录 B .............................................................................. 44 I DB32/T 4285-2022 C80 预应力混凝土抗拔空心方桩配筋及力学性能参考表 ...................................... 44 附 录 C .............................................................................. 45 预应力混凝土空心方桩的力学性能计算 ................................................... 45 附 录 D .............................................................................. 49 锤击沉桩选择参考表 ................................................................... 49 附 录 E .............................................................................. 50 静压沉桩选择参考表 ................................................................... 50 附 录 F .............................................................................. 51 锤击沉桩施工记录表 ................................................................... 51 附 录 G .............................................................................. 52 静压沉桩施工记录表 ................................................................... 52 附 录 H .............................................................................. 53 空心方桩构造示意 ..................................................................... 53 附 录 J .............................................................................. 54 抗拔空心方桩机械接头抗弯性能试验方法 ................................................. 54 附 录 K .............................................................................. 56 抗拔空心方桩机械接头抗剪性能试验方法 ................................................. 56 附 录 L .............................................................................. 58 抗拔空心方桩机械接头抗拉性能试验方法 ................................................. 58 II DB32/T 4285-2022 前 言 本规程按照 GB/T 1.1—2020《标准