内容简介
DB/T 29-270-2019 备案号∶ J15259-2020天津市预应力混凝土矩形支护桩技术规程
Technical specifications for prestressed concrete rectangular supporting pile in Tianjin
2020-09-01 实施
2020-06-28 发布
目次
1 总则 ................................................................................................. 1
2 术语和符号 ..................................................................................... 2
2.1 术语 .................................................................................... 2
2.2 符号 .................................................................................... 3
3 基本规定 ......................................................................................... 8
4 矩形支护桩的类型及参数............................................................ 10
4.1 桩型 .................................................................................. 10
4.2 材料 .................................................................................. 11
4.3 桩身构造要求 .................................................................. 13
4.4 质量要求 .......................................................................... 15
5 矩形支护桩基坑支护设计与施工 ................................................ 20
5.1 设计 .................................................................................. 20
5.2 构造 .................................................................................. 21
5.3 施工 .................................................................................. 22
5.4 堆放与运输 ...................................................................... 23
5.5 静压法沉桩 ...................................................................... 25
5.6 锤击法沉桩 ...................................................................... 27
5.7 植入法沉桩 ...................................................................... 29
5.8 施工监测 .......................................................................... 30
6 基坑矩形斜桩支护结构................................................................ 32
6.1 一般规定 .......................................................................... 32
6.2 土压力 .............................................................................. 34
6.3 结构计算 .......................................................................... 41
6.4 稳定性验算 ...................................................................... 47
6.5 构造要求 .......................................................................... 60
6.6 施工 .................................................................................. 65
7 矩形支护桩基坑支护的检测与验收 ............................................ 67
附录 A 矩形支护桩有效预压应力值计算方法 .............................. 69
附录 B 矩形支护桩配筋及力学性能 .............................................. 71
附录 C 矩形支护桩抗压试验方法 .................................................. 79
附录 D 矩形支护桩端板与钢筋锚固连接 ...................................... 80
附录 E 矩形支护桩端板详图 .......................................................... 82
附录 F 矩形支护桩接桩详图 .......................................................... 83
附录 G 抗弯试验方法 ...................................................................... 85
附录 H 抗剪试验方法 ...................................................................... 88
附录 J 矩形支护桩与冠梁连接详图 ............................................... 90
本规程用词说明 ................................................................................. 92
引用标准名录 ..................................................................................... 93
条文说明 ............................................................................................. 95