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《建筑地基基础设计规范》(GB 50007—2011)中规定采用分层总和法来计算天然地基的沉降,计算过程比较复杂。为了快速地估算地基沉降数值,以方形基础、单一土层天然地基为背景分析了地基沉降数值随基础尺寸、土层压缩模量的变化规律。根据计算结果拟合出了地基沉降的快速估算经验公式,同时给出了地基压缩层深度的快速估算公式。采用本文给出的公式,可以快速地估算出方形筏基沉降和压缩层深度的大致数值,给结构工程师提供便利。
The “Code for Design of Foundations of Building Foundation” (GB 50007-2011) stipulates the method of stratified summation to calculate the settlement of natural foundation. The calculation process is complicated. In order to quickly estimate the settlement of foundation, the changing regularity of foundation settlement and compressive modulus of soil is analyzed on the basis of square foundation and single foundation natural foundation. According to the calculation results, the empirical formula of rapid settlement of foundation settlement is fitted out, and a fast estimation formula for the depth of compression layer is given. Using the formulas given in this paper, we can quickly estimate the approximate values of the settlement and compression depth of the square raft to provide structural engineers with convenience.