浆囊袋注浆锚杆在超大面积软土基坑支护中的应用  

Application of slurry bursa bag grouting bolt in retaining and protecting for foundation excavation for super large foundation pit in soft soil area

作　　者：孔剑华[1] 

机构地区：[1]杭州市勘测设计研究院,杭州310012

出　　处：《工程勘察》2013年第1期28-31,共4页Geotechnical Investigation & Surveying

摘　　要：在城市地下空间大规模开发过程中,大型软土基坑支护问题成为一个难点,该类型基坑具有超大面积及距离用地红线较近的特点。传统支护手段费用高、施工工艺复杂,推广发展新型支护工艺成为必然。浆囊袋注浆锚杆新技术具有工艺简单、抗拔力高等特点,适合应用于大型软土基坑支护。本文结合某工程实例,对基坑监测数据进行了分析,总结了浆囊袋注浆锚杆新技术在超大面积软土基坑支护中的应用经验,对类似工程有一定的借鉴意义。In the process of large-scale development of urban underground space,the bracing of large soft soil foundation pit has been a difficulty.The foundation pits of that type have the characteristics of large area and closer from redlining.The traditional bracing structure is expensive and simple,therefore,popularization of the new support technology is a necessity.The new technique of slurry bursa bag grouting bolt has the advantages of simple process,high pull-out resistance;it is suitable for the bracing of large soft soil foundation pit.The application of slurry bursa bag grouting bolt in the bracing of foundation pit of large area soft soil is introduced in this paper in combination with a certain instance,and it could be a reference for similar engineering projects.

关 键 词：浆囊袋注浆锚杆 基坑支护 软土基坑 

分 类 号：TU447[建筑科学—岩土工程]