花岗岩孤石的成因、判别及对桩基施工的影响与利用

Brief Talk on the Cause of Formation,Discrimination of Granite Boulder and its Influence and Utilization on Pile Foundation Construction

归纳在岩土工程勘察及不同桩基施工工艺中常用的花岗岩孤石判别方法,探讨利用花岗岩孤石作为桩端持力层的可行性。经验算并结合工程实例分析,结果表明,利用花岗岩孤石作为桩端持力层既满足承载力要求,又缩短工期,更节省投资,是花岗岩孤石发育地区的一种卓有成效的桩基施工方法。

This paper summarizes the commonly used discrimination methods of granite boulder in geotechnical engineering investigation and pile foundation construction,and discusses the feasibility of using granite boulder as pile end bearing stratum.The results show that using granite boulder as pile end bearing layer not only meets the requirements of bearing capacity,but also shortens the construction period and saves investment.It is an effective pile foundation construction method in granite boulder distribution area.