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软基桥头跳车是目前公路建设中常见的通病之一。通过对实际工程中水泥粉喷桩联合土工格栅处理的桥头软基进行监测与分析认为:填土过程中的应力分配是一个逐渐调整的过程,粉喷桩承受了大部分的上覆荷载,桩土在整个受荷过程中是相互协调共同发挥作用,并能有效减少加固区沉降量与桥台连接处的差异沉降;土工格栅在整个施工过程中,通过调整荷载分配,提高地基的承载力和整体稳定性,从而减少路基沉降;粉喷桩联合土工格栅处理桥头软基的方法对减少侧向位移也是有良好效果的。因此,粉喷桩联合土工格栅是一种良好的软基处理方法,对桥头软基处理,消除桥头跳车病害具有重要指导意义。
Soft-base bridgehead jumping is one of common common faults in highway construction. Through the monitoring and analysis of the bridgehead soft foundation treated by cement powder injection pile and geogrid in the actual project, the stress distribution in the process of filling is a gradual adjustment process, and the DJM pile suffers the most overburden, Pile-soil plays a role in coordinating with each other during the whole process of loading, and can effectively reduce the differential settlement between the settlement of abutment and the abutment in the abutment. Geogrid can increase the bearing capacity of the foundation by adjusting load distribution throughout the construction process Force and overall stability, thereby reducing roadbed settlement; DJM combined with geogrid method of bridgehead soft foundation to reduce the lateral displacement is also a good effect. Therefore, DJM combined with geogrid is a good soft foundation treatment method, which has important guiding significance for bridgehead soft foundation treatment and elimination of bridgehead jumping disease.