多种支护形式在深厚砂层场地深大基坑支护中的应用研究
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摘要
深厚砂层条件下深大基坑支护结构的选型是保证基坑支护结构安全、可行的基础。以佛山南海区某深大基坑工程为依据,研究多种支护形式在深厚砂层场地深大基坑支护中的应用。该基坑支护工程主要采用地下连续墙结合排桩的双排支护形式,旋挖桩结合可回收扩大头锚索的桩锚支护形式。工程实践表明:方案切实可行,多种支护形式应用于深大基坑支护中具有一定技术可行性,可供类似工程借鉴。
The deep sand layer under the condition of deep foundation pit supporting structure selection is to assure the safety of foundation pit supporting structure and feasible basis. In this paper,based on a deep foundation pit project,located in Nanhai district,Foshan,a variety of support forms in deep sand field application of deep foundation pit is studied. The foundation pit supporting project mainly uses the underground continuous wall in combination with the double row pile supporting form,rotary digging pile combined with recycled expanding head of anchor pile anchor support form. Engineering practice shows that the scheme is feasible. A variety of supporting form used in deep foundation pit has certain technical feasibility.
The deep sand layer under the condition of deep foundation pit supporting structure selection is to assure the safety of foundation pit supporting structure and feasible basis. In this paper,based on a deep foundation pit project,located in Nanhai district,Foshan,a variety of support forms in deep sand field application of deep foundation pit is studied. The foundation pit supporting project mainly uses the underground continuous wall in combination with the double row pile supporting form,rotary digging pile combined with recycled expanding head of anchor pile anchor support form. Engineering practice shows that the scheme is feasible. A variety of supporting form used in deep foundation pit has certain technical feasibility.
引文
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[12]李俊,杨光华,陈富强.佛山新城CBD项目基坑桩锚支护监测分析[J].广东水利水电,2016(9):16-24.
[2]谢琳.复杂条件下的深基坑支护设计选型研究及实例分析[J].广东土木与建筑,2018(1):1-3.
[3]丁勇春,李光辉,程泽坤,等.地下连续墙成槽施工槽壁稳定机制分析[J].岩石力学与工程学报,2013(S1):2 704-2 709.
[4]金炯球.桩加锚撑混合支护结构在软土地区深基坑中的应用[J].广东土木与建筑,2017(03):34-36.
[5]中国土木工程学会.建筑基坑支护技术规程[M].北京:中国建筑工业出版社,2012.
[6]姜燕,杨光华,乔有梁,等.不对称支护结构下深基坑的简化计算方法及应用[J].广东水利水电,2017(6):33-38.
[7]彭建忠,张正乾,刘少跃.预应力可回收锚索在超大基坑工程中的应用[J].广东水利水电,2015(2):52-55.
[8]刘波,张功,杨伟红,等.扩大头锚索在饱和粉细砂层中的受力特性[J].地下空间与工程学报,2016(2):412-419.
[9]余东华,梁建赞,钟楠.高压摆喷桩围井试验在汕头南岗水闸基坑的应用[J].广东水利水电,2015(6):53-57.
[10]聂耳清.软土深基坑中双排桩临时支护与永久结构结合的应用与探讨[J].广东水利水电,2016(6):18-21.
[11]黄俊光,罗永健.建筑基坑工程监测问题的探讨[J].广东水利水电,2016(6):25-27.
[12]李俊,杨光华,陈富强.佛山新城CBD项目基坑桩锚支护监测分析[J].广东水利水电,2016(9):16-24.