联合支护技术在深大基坑中的应用研究  

Research on the Application of Combined Support Technology in Deep Foundation Pit

作　　者：张金 钟杏林 肖皓平 邱盛贵 Zhang Jin;Zhong Xinglin;Xiao Haoping;Qiu Shenggui(Zhonggan Nuclear Ecological Environment Group(Jiangxi)Co.,Ltd.,Nanchang,China)

机构地区：[1]中赣核生态环境集团(江西)有限公司,江西南昌

出　　处：《科学技术创新》2025年第10期163-166,共4页Scientific and Technological Innovation

摘　　要：为研究联合支护技术在深大基坑中的应用,本文以实际工程为例,结合基坑平面形状、开挖深度、周围环境条件及工程水文地质条件等因素,分析设计控制关键点,确定了悬臂桩支护+放坡+单排高压旋喷桩与双排灌注桩+放坡+双排高压旋喷桩的联合支护方式。利用有限元进行数值计算,结果表明两个开挖深度剖面的支护结构最大水平位移为17.60 mm,地表最大竖向位移为11.70 mm,管线最大水平位移为2 mm,管线最大竖向位移为3.5 mm,均在规范允许范围内。To study the application of combined support technology in deep and large foundation pit,this paper takes the actual project as an example,combining the plane shape of foundation pit,the excavation depth,the surrounding environmental conditions and engineering hydrogeological conditions,and analyzes the key points of design control.Finally,it proposes the combined support mode including the cantilever pile support and slop with single-row high-pressure jet grouting pile,and the double-row cast-in-place pile and slop with double-row high-pressure jet grouting pile.The finite element method is used for numerical calculation.The results show that during the two different excavation depth sections the maximum horizontal displacement of the supporting structure is 17.60 mm,and the maximum vertical displacement of the surrounding surface is 11.70 mm.While the maximum horizontal displacement of the pipeline is 2 mm,and the maximum vertical displacement of the pipeline is 3.5 mm.All deformations are within the allowable range of the specification.

关 键 词：深大基坑 联合支护 数值模拟 位移 

分 类 号：TU431[建筑科学—岩土工程]