喷锚支护结构在膨胀土地区基坑支护中的应用 .pdfVIP

学兔兔 第26卷1期 中 国 煤 炭 地 质 V01．26 No．01 2014年1月 C0AL GE0L0GY 0F CHINA Jan． 2014 doi：10．3969~．issn．1674—1803．2014．01．09 文章编号：1674—1803(2014)01—0048—03 喷锚支护结构在膨胀土地区基坑支护中的应用 千利军 (中国煤炭地质总局华盛水文地质勘察工程公司，河北邯郸 056004) 摘 要：膨胀土地区的基坑支护一般采用土钉墙型式，但出现了较多的垮塌事故。详细介绍了邯郸市某小区综合楼 的膨胀土基坑喷锚支护工程的设计与施工方法。考虑膨胀土吸水膨胀失水收缩对边坡稳定性的影响，针对基坑支 护结构验算的相关参数，依据膨胀土地区情况给予了相应的调整。基坑分层开挖进行喷锚支护后整体稳定性较 好，达到了预期目的。本实例旨在为膨胀土地区基坑支护设计与施工提供一个借鉴和参考。 关键词：喷锚支护；膨胀土地区；基坑边坡支护 中图分类号：TU443 文献标识码：A Application of Combined Bolting and Shotcrete Structure in Swelling Soil Area Foundation Pit Support Wang Lijun (Huasheng Hydrogeological Exploration Engineering Company，CNACG，Handan，Hebei 056004) Abstract：The foundation pit support in swelling soil generally uses soil nailing typed support，but a lot of collapse accidents happened． The paper introduced design and construction method of a building complex swelling soil foundation pit combined bolting and shoterete engineering in a Handan housing estate in detail．Considering the impacts from swelling soil water absorption swelling and dehydration shrinking on slope stability，in allusion to related parameters in foundation suppofl structure checking computations，according to swell— ing soil area practical situation have made corresponding adjustments．Excavation in layers，the stability of foundation pit is rather good after combined bolting and shotcrete thus achieved the anticipated results．The case study is aimed at providing a reference for founda—