施工技术 2011年4月上 30 CONSTRUCTION TECHNOLOGY 第40卷第338期 复杂环境条件下深基坑综合支护技术的应用 朱永清 (山西四建集团有限公司，山西太大原030012) 【摘要]某深基坑工程周边环境复杂，基坑两侧距离城市道路主干线只有3m 放坡距离小；另外两侧埋有上下水管 道和热力管道，不能放坡.施工中按深度采取上下两种支护方法，上部土钉支护、下部采用，铺支护；同时充分利 用场地，在可以放坡的两边进行放坡，减少挖方量.采用深层搅拌桩止水椎幕，降水采用坑内管井密布降水井疏干 地层水的方式.工程实践表明，通过采取该综合支护技术，取得了较好的支护效果. [关键词]深基坑；土钉支护；桩铺支护；止水椎：降水并 [中图分类号]U753.3 [文献标识码]A [文章编号]1002-8498(2011)07-0030-04 Application of Comprehensive Bracing Technique Used in Deep Foundation in Complicated Environment Zhu Yongqing China Shanzi Sijian Group Co.Ltd.Taiyuan Shanxi 030012 China) Abstract:The surrounding environment of some deep foundation is plex.The distance between two sides of the foundation and urban road is just 3 meters while there are water pipe and thermal pipeline buried in the other sides.Comprehensive bracing technique as soil nail support used in upper part and pile anchor support used in lower part while putting slop in suitable place to reduce excavation quantity is adopted.Waterproof curtain of deep mixing pile and densely covered wells for precipitation are adopted. Engineering practice shows that good effect is obtained according to the prehensive bracing technique. Key words:deep foundation;soil nail support;pile anchor support;waterproof curtain precipitation well 1工程概况 8.26m(c=19.2kPa =21.5);③粉质黏土平均 某工程为一类人防工程，地下2层，剪力墙结厚度为10.39m(c=29.5kPa =18.6°)；④粉质黏 构，基坑开挖深度12.8~15.3m 南北长116m 东西土平均厚度为9.21m(c=31kPa =18.1°). 宽90m.基坑东、南侧距离道路红线均为3.0m;西 地下水类型为孔隙潜水，大体径流向为自东向 侧20m处有地下1层人防工程及地上2层建筑，基西，主要补给来源为侧向...
复杂环境条件下深基坑综合支护技术的应用.pdf
