西安北站密集群桩后压浆技术综述

On the High Density Piles Post Grouting Technique in Xi'an North Station

西安北站车站2800余棵桩基全部采用桩基后压浆形式。后压浆钻孔桩是桩基工程中新技术,钻孔桩后压浆可以有效地提高桩基承载力,减少基础沉降量,西安北站主站房工程中广泛使用了该施工工艺。简要地介绍了钻孔桩后压浆理论,并结合工程实例论述了西安地区钻孔桩桩端后压浆施工工艺。

Over 2,800 pile foundations in Xi＇an North Station are in the form of pile foundation post grouting.Post grouting bored pile is a new technique in pile foundation engineering,which can effectively increase the bearing capacity of the pile foundation,decrease the ground subsidence,and is widely used in the main house of Xi＇an North Station.In this paper,the theory of bored pile post grouting and its construction techniques in Xi＇an area in the light of real engineering practice are introduced.