基于基坑勘察成果的支护参数分析及设计研究  

Analysis and Design of Support Parameters Based on the Results of Foundation Pit Survey

作　　者：谭坦 王军 Tan Tan;Wang Jun(Guangxi Headquarters of China Construction Materials Industry Geological Exploration Center,Guilin,Guangxi 541000;Guangxi Zhuang Autonomous Region Geophysical Survey Institute,Liuzhou,Guangxi 545000)

机构地区：[1]中国建筑材料工业地质勘查中心广西总队,广西桂林541000 [2]广西壮族自治区地球物理勘察院,广西柳州545000

出　　处：《江西建材》2023年第9期177-178,184,共3页Jiangxi Building Materials

摘　　要：文中根据工程勘察成果,分析基坑设计岩土参数,确定基坑支护形式,并结合现场监测成果,评价了基坑支护效果。根据实例分析,某基坑所处地质条件较差,且邻近既有建(构)筑物,地质环境较为复杂,为确保施工安全,最终设计采用桩墙式基坑支护方案,即采用钢筋混凝土支护桩进行主体防治,中间采用素混凝土进行咬合搭接。基坑变形监测结果显示,水平位移变形范围为10.29~15.95 mm(均值为13.47 mm),沉降位移变形范围为10.50~16.27 mm(均值为13.74 mm),均在变形设计控制值范围内,故本支护设计方案满足设计要求,为现场安全施工提供了一定的理论依据。Based on the results of engineering survey,the geotechnical parameters of the foundation pit design were analyzed,and the form of foundation pit support was determined.Combined with the on-site monitoring results,the effectiveness of foundation pit support was evaluated.The example analysis shows that the geological conditions of the foundation pit are poor,and it is adjacent to existing buildings(structures).The geological environment is relatively complex.To ensure construction safety,the final design adopts a pile wall type foundation pit support scheme,which uses reinforced concrete support piles for main prevention and control,and plain concrete is used for interlocking and overlapping in the middle.The deformation monitoring results of the foundation pit show that the horizontal displacement deformation range is 10.29~15.95 mm(with an average of 13.47 mm),and the settlement displacement deformation range is 10.50~16.27 mm(with an average of 13.74 mm),both within the deformation design control value range.Therefore,this support design scheme meets the design requirements and provides a certain theoretical basis for on-site safe construction.

关 键 词：基坑 勘察成果 支护参数 变形监测 

分 类 号：U452[建筑科学—桥梁与隧道工程]