从实例看花岗岩地基勘察的几个特点

以花岗岩类的硬质岩作为建筑物基础持力层,具有承载力高、稳定性好,抗震性强的特点,被许多重要建筑物所采用,尤其是沿海地区的高层建筑物。但往往此类基岩的层面不够“平整”,基岩层面的变化对基础的设计、施工,尤其是桩基础影响很大。本文通过对某高层建筑进行地基勘察的实例,总结了花岗岩地区风化岩层的几个特征及其在工程勘察中需注意的一些问题。

Some Characteristics of the Investigation for Granite Foundation from Engineering Examples

The hard rocks as granite are of the characteristics such as high bearing capacity,good stability and anti-earthquake which are used as the bearing stratum of building,but the surface of the kind of rocks are uneven.The change of bedrock surface greatly influences the design and construction of foundation,especially to the pile foundation.Through the investigation example for certain high-rising building foundation,some characteristics of weathered rock in granite area and the problems which should be attended in engineering investigation are summarized.