DB11 489-2016 建筑基坑支护技术规程.pdf

1、 ICS 备案号 ： 北 京 市 地 方 标 准 DB 编 号：DB11/489 2016 备案号：J13247 2016 建筑基坑支护技术规程 Technical specification for retaining and protecting of building foundation excavation 2016-08-10 发布 2016-12-01 实施 3.1.9 6.3.6 7.3.20 8.1.2 8.2.5 2014 2014 36 DB11/489-2007 A B C A C 3.1.2 3.1.4 3.1.5 1 2 3.1.6 3.1.7 3.7.3 3.7.

2、4 3.7.5 3.7.6 3.7.8 3.7.13 6.3.6 6.4.2 3 5 3.7 8 9 B C B C 1 A 910 100055 1 . 1 2 . 2 2.1 . 2 2.2 3 3 . 5 3.1 . 5 3.2 . 7 3.3 . 8 3.4 . 9 3.5 . 14 4 . 15 4.1 . 15 4.2 . 15 4.3 . 15 5 . 17 5.1 17 5.2 17 5.3 . 18 5.4 . 21 5.5 . 23 5.6 . 24 5.7 . 26 5.8 . 29 5.9 . 31 6 . 33 6.1 . 33 6.2 . 33 6.3 38 6.4

3、 . 41 7 . 42 7.1 42 7.2 . 43 7.3 . 43 7.4 . 50 7.5 . 50 8 . 51 8.1 . 51 8.2 . 51 8.3 . 51 8.4 . 52 9 . 53 9.1 . 53 9.2 . 53 9.3 . 54 9.4 . 55 9.5 . 56 9.6 . 57 9.7 . 58 A . 60 B . 63 C . 64 . 66 . 67 . 68 Contents 1 General Provisions 2 Terms and Symbols . 2 2.1 Terms 2 2.2 Symbols 3 Basic Requierme

4、nts . 5 3.1 Principles of Design . 5 3.2 Investigation of Excavated . 7 3.3 Choice of Structural Types . 8 3.4 Horizontal Load . 9 3.5 Testing of Quality . 14 4 Sloping 15 4.1 Design of Sloping . 15 4.2 Construction of Sloping 15 4.3 Testing of Quality . 15 5 Retaining Structures 17 5.1 General Requ

5、ierments 5.2 Structural Analysis . 17 5.3 Excavations Stabilitys Analysis . 18 5.4 Design of Double-Row-Piles Wall . 21 5.5 Bearing Capacity Calculation of Sectional 23 5.6 Anchor Calculation 24 5.7 Structural Detail . 26 5.8 Consturction . 5.9 Testing of Quality . 31 6 Soil Nailing Wall . 6.1 Gener

6、al Requierments 33 6.2 Design 33 6.3 Consturction . 38 6.4 Testing of Quality . 41 7 Groundwater Control 42 7.1 General Requierments 42 7.2 Cut-Off Drains . 43 7.3 Dewatering . 43 7.4 Drainage Galleries 50 7.5 Rechaerge . 50 8 Excavation51 8.1 General Requierments 51 8.2 Excavate . 51 8.3 Groundwate

7、r Control . 51 8.4 Seal off and Backfill . 52 9 Monitoring 53 9.1 General Requierments 53 9.2 Monitoring Items 53 9.3 Inspectin and Examination . 54 9.4 Arrangement of Monitoring Point 55 9.5 Frequency of Monitoring . 56 9.6 Alarming on Monitoring 57 9.7 Result of Monitoring 58 Appendix A Contents o

8、f Design Documents on Foundation Excavations . 60 Appendix B Reference Form for Pattern Selection on Anchored Bar Steel Waist Rail Considered with Simple Structure Beam . 63 Appendix C Calculation on Seepage Stability 64 Explanation of Wording in This Specification 66 List of Quoted Standards . 67 A

9、ddition Explanation of Provisions . 68 1 1 总则 1.0.1 1.0.2 1.0.3 1.0.4 2 2 术语和符号 2.1 2.1.1 building foundation pit 2.1.2 side of foundation pit 2.1.3 surroundings around foundation pit 2.1.4 retaining and protecting for foundation excavation 2.1.5 soldier piles 2.1.6 diaphragm wall 2.1.7 soil nailing

10、 wall 2.1.8 soil anchor 2.1.9 capping beam 2.1.10 waling 2.1.11 fulcrum 2.1.12 embedded depth 2.1.13 groundwater controlling 2.1.14 curtain for cutting off water 3 2.2 2.2.1 c f y f py f yk k K ai K pi i q R k q sk R w 2.2.2 p ak p pk u q 0 p 0 S M M k N N k V V k Q 2.2.3 A b d h H l l d l f s x 4 R

11、 2.2.4 a o t K K e K s Kse1 K se2 j 5 3 基本规定 3.1 3.1.1 3.1.2 3.1.3 1 2 3 4 3.1.4 3.1.5 h 3.1.5 3.1.5 1 h 2 a x a h 3.1.5 3 4 a a h x a 6 5 6 3.1.5 3.1.6 o o 1.1 o 1.0 o 0.9 3.1.7 1 2 3 4 0.002h 0.004h 0.006h 3.1.8 3.1.9 基坑工程设计应包 括下列内容： 1 支护结构体系的方案 和 技术经济比较； 2 基坑支护体系的稳定 性 验算； 3 支护结构的强度、稳 定 和变形计算； 4 地下水控制设计； 5 对周边环境影响的控 制 设计； 6 基坑土方开挖方案； 7 基坑工程的监测要求 。 3.1.10 1 a h x a 7 2 3 4 5 6 3.1.11 1 c cu cu c cq cq c 2 c cu cu c cq cq c uu uu 3 c c cu cu c cq cq 4 3.1.12 3.1.13 3.1.14