深厚软土基坑斜抛撑与SMW工法组合施工安全应用  

Safety Application of Combined Construction of Inclined Shoring and SMW Method in Deep Soft Soil Foundation Pit

作　　者：刘道路 LIU Dao-lu(Shanghai Municipal Engineering Design and Research Institute Group Co.,Ltd.,Shanghai 200082,China)

机构地区：[1]上海市政工程设计研究总院集团有限公司,上海200082

出　　处：《价值工程》2023年第30期98-102,共5页Value Engineering

摘　　要：河湖相沉积及冲海相沉积深厚软土层强度低、承载力小,加之基坑工程施工周期短、工期要求严格,为了能够快速、安全地完成深厚软土基坑支护施工,基于目前基坑支护方案优选,提出斜抛撑与SMW工法组合支护方法,以工程实例为背景,采用理正开展斜抛撑与SMW工法在深厚软土受力变形分析,得到该支护方法最大受力点及变形特性;结合工程施工环境,优化斜抛撑与SMW工法组合施工工艺;通过对现场基坑检测数据实时分析,探究深厚软土土方开挖卸载及周边荷载作用下斜抛撑与SMW工法基坑变形特点,结合理论分析验证了该组合支护方法在深厚软土地层基坑支护的可行性。The deep soft soil layer of fluviolacustrine and alluvial marine deposits has low strength and bearing capacity.In addition,the construction period of foundation pit works is short and the construction period is strict.In order to complete the deep soft soil foundation pit support construction quickly and safely,based on the current foundation pit support scheme optimization,a combined support method of inclined throwing support and SMW construction method is proposed.Taking the engineering example as the background,the maximum stress point and deformation characteristics of the support method are obtained by analyzing the stress and deformation of the inclined bracing and SMW construction method in deep soft soil.Combined with the project construction environment,optimize the combined construction technology of inclined bracing and SMW construction method.Based on the real-time analysis of the on-site foundation pit detection data,the deformation characteristics of the foundation pit of inclined bracing and SMW construction method under the action of deep soft soil excavation unloading and surrounding load are explored,and the feasibility of the combined support method in deep soft soil foundation pit support is verified by theoretical analysis.

关 键 词：SMW工法 斜抛撑 深厚软土 基坑支护 施工工艺 

分 类 号：TU753[建筑科学—建筑技术科学]