大连沿海地区某基坑工程支护及阻水技术.pdf

2012年4月上 施工技术 第41卷第362期 CONSTRUCTION TECHNOLOGY 67 大连沿海地区某基坑工程支护及阻水技术 郑昌晶，于振辉，赵锡山，张恒 (河北省地矿局秦皇岛矿产水文工程地质大队，河北秦皇岛066000) [摘要]针对大连沿海地区回填地层极为复杂的工程地质条件及海水影响，通过工程实例，介绍了基坑支护、阻水 及开挖设计.经过方案比选，确定了搭接柱列式挡土墙和帷幕注浆的方案，并对其关键技术进行控制，保证了基坑 施工和周边建筑物的安全，降低了成本，缩短了工期.同时针对帷幕注浆及钻孔灌注桩施工过程中出现的问题，如 塌陷、径缩、漏浆、偏岩、溶洞等给出了防治措施. [关键词]基坑；沿海地区；支护；阻水；施工技术 [中图分类号]TU753.1 [文献标识码]A [文章编号]1002-8498(2012)07-0067-04 Supports and Water Resistivity Technology for Some Foundation Excavation in Coastal Area Dalian Zheng Changjing Yu Zhenhui Zhao Xishan Zhang Heng Mineral Resources Hydrogeology and Engineering Geology Team in Qinhuangdao of Hebei Bureau of Geology and Mineral Qinhuangdao Hebei 066000 China) Abstract:According to the extremely plex geological conditions and seawater impact of coastal backfill strata in Dalian through practice engineering the authors describe the design of foundation excavation supports water resistivity and digging.By parison and selection of schemes the technique of lapping column-style retaining wall and curtain grouting is applied which can save cost and reduce period.Meanwhile the key techniques are controlled to assure the safety of foundation excavation construction and around buildings.Furthermore according to the problems occurring in construction of curtain grouting and bored piles such as collapse reducing diameters mud leakage rock deviation and karst cave corresponding prevention measures are put forward. Key words:foundation excavation;coastal area;supports;water resistivi...