宿迁某人防工程基坑支护设计实例
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（江苏省都市建筑设计研究院有限公司，宿迁 223800）[摘要] 宿迁市位于江苏省北部，市区主要为冲积平原地貌单元。该地下人防工程位于宿迁市区废黄河西侧约1公里处，此地段为宿迁市新区的商业中心。人防地下室与周边主楼均设置地下连通口相接，起到地下枢纽作用，极具商业价值。场地上部地层主要为黄河泛滥冲积而形成的第四纪新近沉积土。基坑开挖深度15.0m，周边环境较复杂，地下水丰富，土层较软，易坍塌。设计时充分利用场地条件，并考虑节约投资、缩短工期而采用多种支护体系相结合的基坑支护方案。最终对理论计算和实测结果进行对比，岩土参数取值和计算模型均与实际情况基本吻合。[关键词] 基坑; 内支撑; 土钉; 排桩中图分类号：TU46+3 文献标识码：A 文章编号：1002-848X(2013)S2-0612-04作者简介：庞贵春，工程师，注册岩土工程师，Email：panggc@126.com。A example of excavations design for a civil air defense engineering in Suqian cityPang Guichun(Jiangsu Province Dothing Architectural Design Research Institute Co., Ltd., Suqian 223800,China）Abstract: Suqian city, located in the north of Jiangsu province, is the alluvial plain geomorphic unit. The underground civil air defense engineering is located in Suqian city on the west side of the abandoned Yellow River about 1km, where is the commercial center of Suqian City New District. The civil air defense engineering and its surrounding buildings were arranged underground communication port, which played a pivotal role of underground hub and commercial value. The upper strata was mainly quaternary alluvial soil recently deposited which was formed by the Yellow River flood. The excavation, with the depth of 15.0 meters, had complex surrounding environment, richer groundwater and softer soil, which probably made the excavation easy to collapse. Considering the full use of site conditions, and to save investments, as well as shorten the construction period, a type of combined-supporting-system was adopted when designing. Ultimately, geotechnical parameters selection and calculation model were proved to be consistent with the actual situation by the comparison of the theoretical calculation and actual measurement results.Keywords: excavations; strut; soil nail; soldier pile wall
