路堤荷载下水泥砂浆桩复合地基承载特性分析

Analysis on Bearing Characteristic of Composite Foundation of Cement Mortar Pile under Load of Embankment

水泥砂浆桩是较为常用的复合地基处理形式,工程中常常通过桩径、桩间距、桩长、水泥掺入量等参数的设置,完成设计施工,基本满足工程需要。随着工程质量要求不断提高,深入分析桩的受力特点,研究桩土间力的分配规律,掌握水泥砂浆桩复合地基的承载特性,对于精细化的工程具有重要意义。对路堤作用下水泥砂浆桩的沉降、桩身轴力、桩土应力比、桩身应力等参数进行研究,通过对比现场试验和数值模拟结果,得出承载特性规律,对工程实践具有一定的借鉴意义。

The cement mortar pile is the common treatment form of composite foundation. The design construction is often finished by setting up parameters like pile diameter, pile space, pile length, mixing amount of cement and so on in the project, which can basically meet the engineering requirement. With the continuous improvement of the engineering quality requirement, the loading feature of the pile is analyzed deeply, the distribution rule of fore in soil between piles is studied, and the bearing characteristic of composite foundation of cement mortar pile is mastered, which has important significance for the refined engineering guidance. The research on parameters of cement mortar pile under the effect of embankment like settlement, axial force of pile shaft, pile - soil stress ratio, stress of pile shaft and so on is made. The rule of bearing characteristic is obtained through the comparison of site test and result of numerical simulation, so as to provide certain reference meaning for the engineering practice.