利用土工格栅减小桥台桩土压力和桩体位移的研究

江苏省高速公路施工工艺普遍采用先进行桥台桩的施工,后进行桥台台背填土施工的工艺,造成部分桥台桩受到较大的土压力作用而发生较大的位移,给工程带来不良的后果.针对此现象采用在桥台桩后土体内铺设土工格栅的方法,以减小土体对桥台桩的土压力并减小桥台桩的位移.根据现场实测的结果,该施工工艺效果良好.

Decrease of earth pressure and displacement of abutment piles by buried geo-textile

The abutment pile technique combined with soil filling at the back of abutments was widely applied to expressway construction in Jiangsu Province.It caused large displacement of some abutment piles induced by large earth pressure and resulted in some bad consequences.In consideration of the fact mentioned above,the geo-textile was buried in soil at the back of the piles to decrease the earth pressure on abutment piles and their displacement.According to the measured data,satisfactory result was achieved.