花岗岩地区桩基承载力不足原因分析

Causation Analysis of Pile Foundation Bearing Capacity Deficient

以江西省安远县花岗岩分布区某大型公建项目桩基试桩工程为例,通过采用标准贯入试验、单桥及双桥静力触探等勘察手段,查明了场地花岗岩各风化层的力学性质。在此分析的基础上,采用桩基承载力计算公式,重新估算桩基承载力,并与实际试桩结果进行对比,找出了本项目桩基承载力不足的原因,提出了花岗岩地区勘察应重视原位测试手段的应用。

Taking a granite region pile foundation testing engineering of a large public construction project in the Anyuan County,Jiangxi Province as an example,through exploration means of standard penetration test,single and double bridge static sounding etc have identified mechanic properties of site granite weathering zones.On this basis,using pile foundation bearing capacity computational formula has re-estimated pile foundation bearing capacity.After comparison with actual pile tested results has found the causation of pile foundation bearing capacity deficient of the project.Thus,the application of in situ exploration means in granite region should be paid attention to.