岩溶塌陷精细化探查与治理关键技术
Study on the Deformation Control of Deep Excavation Adjacent to Elevated Bridge Pile Foundation
刘动 1昝子卉 2杨贝贝 1黄文彬1
作者信息
- 1. 深圳市岩土综合勘察设计有限公司 深圳 518172;深圳市地质局 深圳 518023
- 2. 广州地铁设计研究院股份有限公司 广州 510010
- 折叠
摘要
深圳的岩溶发育区主要分布于龙岗、坪山、坪地和葵涌4个岩溶盆地地貌单元,在这些区域进行工程建设,由于地质构造复杂、地下水动态变化、施工扰动等因素,常会出现岩溶塌陷.针对深圳龙岗区地铁建设导致的某中学内发生的岩溶塌陷,通过对既有建筑物基础进行精细化探查,提出了经济、合理的岩溶塌陷治理措施,取得了较好的治理效果.精细化探查在该岩溶塌陷区推测出37处岩溶发育区和130处软弱土区域,探查到软弱土深度主要位于基岩面附近.在现有建筑物存在裂缝,未拆除的情况下,提出了扩展旧基础并且进行旋喷桩地基处理的加固方案,经实施后有效防止了岩溶塌陷的继续发生,为类似岩溶塌陷的防治提供了有益借鉴.
Abstract
The karst development area in Shenzhen is mainly distributed in four karst basin geomorphic units,Longgang,Pingshan,Ping-di and Keichong.Due to complex geological structure,dynamic change of groundwater and construction disturbance,karst collapse often oc-curs during engineering construction in these areas.In view of the karst collapse in a middle school caused by the subway construction in Longgang District,Shenzhen City,through the delicate exploration of the existing building foundation,economic and reasonable measures for karst collapse control have been put forward,and good results have been achieved.In this karst subsidence area,37 karst development areas and 130 weak soil areas are inferred by delicate exploration,and the depth of weak soil is mainly located near the bedrock.In the case that the existing building has cracks and has not been demolished,the reinforcement program of expanding the old foundation and treat-ing the foundation with rotary jet pile is put forward,which effectively prevents the continuation of karst collapse after implementation,and provides a useful reference for the prevention and control of similar karst collapse.
关键词
岩溶塌陷/精细化探查/塌陷治理/地基加固Key words
karst collapse/delicate exploration/collapse treatment/foundation improvement引用本文复制引用
基金项目
广东省深圳市地质局地质工程院士工作站专项经费资助项目(2013B090400025)
出版年
2024
NETL
NSTL
万方数据