新型H型钢前撑在复杂边界条件下深基坑的应用研究  

Application research of a new type of H-shaped steel front brace in a deep and large foundation pit under a complex boundary condition

作　　者：何林南 He Linnan(Shanghai Marine Geological Exploration and Design Co.,Ltd.,Shanghai 200129,China)

机构地区：[1]上海海洋地质勘察设计有限公司,上海200129

出　　处：《山西建筑》2024年第10期80-84,共5页Shanxi Architecture

摘　　要：前撑注浆钢管支护体系是近几年应用的一种新型基坑支护技术,已在长三角地区地下一层广泛应用与实践。与传统钢斜撑相比具有施工便捷、节省工期和对周边环境影响小等明显优势。以某杭州地区某复杂边界条件下深大基坑工程为例,从方案选型、施工技术要点、支护效果等方面对新型H型钢前撑体系进行了详细的分析和介绍,通过现场试验、数值模拟分析和现场监测等手段,进一步分析验证了H型钢前撑体系使用的可行性,为类似地质和边界条件下深大基坑工程设计提供参考。The steel pipe support system of front bracing grouting is a new type of foundation pit support technology applied in recent years,which has been widely used and practiced in the underground layer in the Yangtze River Delta area.Compared with the traditional steel inclined brace,it has obvious advantages such as convenient construction,saving time and less impact on the surrounding environment.Taking a deep and large foundation pit project in a complex boundary condition in Hangzhou area as an example,a detailed analysis and introduction of the new H-beam front bracing system is carried out from the aspects of scheme selection,key points of construction technology and supporting effect,etc..The feasibility of using the H-beam front bracing system is further analyzed and verified by means of field test,numerical simulation analysis and on-site monitoring.It provides reference and experience for deep and large foundation pit engineering design under similar geological and boundary conditions.

关 键 词：复杂边界条件 深大基坑工程 H型钢前撑 

分 类 号：TU473[建筑科学—结构工程]