后压浆技术在深厚砂土地层中的应用研究

The application of post-grouting technology to deep sand soil

桩端后压浆技术是对传统桩基施工技术的一种工艺优化,具有较大的实用性和经济性,对弱胶结的砂土地层非常适用,结合巴基斯坦某大型工程,采用4组原位静载试验,定量评价深度砂土地层中桩端后压浆对基桩端阻力和侧阻力的改善效果.

The post-grouting technology is the technology optimization about traditional pile foundation construction,which has great practicability and economy and is effective to apply to weakly consolidated sand formation.The experiment in the large project in Pakistan,which adopted the four groups of in-situ static load test,had made the quantitative evaluation of the depth of the sand stratum of post-grouting on the improvement of the pile tip resistance and side resistance effect.