基于灰色关联理论的钻孔灌注桩孔壁致塌因素分析

Analysis on collapse factors of hole wall of bored pile based on grey relational theory

我国东南沿海地区分布着大量的软土地基,承载能力低、变形大,往往不能满足上部建筑物的承载要求。钻孔灌注桩以其承载力高、施工噪音小等优点被广泛应用在东南沿海城市的现代化建设工程中。以东南沿海钻孔灌注桩工程实例为背景,确定了该地区灌注桩孔壁致塌影响因素,并运用灰色关联理论建立了钻孔灌注桩致塌因素定量评价模型,计算确定了各个致塌因素的关联度大小并排序,通过分析找出主要、次要致塌因素,为工程实践提供了参考依据。

There is a mass distribution of some soft soil foundation in the southeast coastal areas of China, it of- ten can not satisfy the bearing requirement of the upper part of the building because of its low bearing capacity and large deformation. The bored pile, with such advantages as high bearing capacity, small construction noise and etc. , was widely used in the modern construction of the southeast coastal cities in the process. Based on the example of the bored pile engineering in southeast coastal areas, the influence factors causing hole wall collapse of bored pile were determined, and the quantitative evaluation model of collapse factors was established based on grey relational theory. The correlation size of each collapse factor was calculated and then sorted in numerical order, the primary and second- ary collapse factors -were found out through analysis, which provides a reference for engineering practice.