陕南地区深基坑支护综合应用技术

Comprehensive Application Technology of Deep Foundation Excavation Support in Southern Shaanxi Region

针对陕南地区砂层埋藏浅、分布厚、摩擦角小易垮塌、锚杆成孔困难、基坑支护技术约束大等问题进行研究讨论,并通过工程实地运用进行经验总结,对于砂土层深基坑支护采取排桩、锚杆、钢花管3种支护并用的联合支护形式,可有效解决砂土层中锚杆无法成孔等难题,同时降低工程成本,保证基坑安全稳定。

According to the features of sand layer in Southern Shaanxi Region,it is shallow burial depth,thick distribution,little frictional angle easy to break down,difficult to form pore and the anchor technology of supporting excavation is constrained,authors study the technology of supporting excavation and using in project. The combined supporting technology with exhaust piles,anchor and steel pipe by hole is used to deep foundation excavation of sand layer,the difficulties of forming pore in the sand layer are solved,and the project cost is lower,the safe and stable of foundationexcavation is ensured.