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

Application of Support Forms in Deep Foundation Pit of Deep Sand Ground

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 toundation pit supporting structure selection is to assure the safety of foundation pit supporting structure and feasible basis. In this paper, based on a deep toundation 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 tile 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 torm used in deep toundation pit has certain technical feasibility.