水利水电科技进展2017，Vol.37Issue(2)：88-94,7.DOI:10.3880/j.issn.1006-7647.2017.02.016
格栅套筒加筋碎石桩复合地基沉降计算方法
Calculation method for settlement of composite foundation reinforced with geogrid-encased stone columns
摘要
Abstract
An analysis of the bearing and deformation mechanism of a composite foundation reinforced with geogrid-encased stone columns is presented in order to obtain its bearing characteristic and settlement calculation method. The composite foundation is divided into three parts:the reinforced section, the unreinforced section, and the underlying stratum. Based on the Hooke' s law of space problem and layer summation method, the settlement of the reinforced section is calculated with the layered iteration method in view of the relative slip displacement between the pile and soil of the reinforced section without a plastic zone. The compatibility of vertical and radial deformation of the unreinforced section is analyzed based on the pile-soil element model. The settlement of the underlying stratum is calculated by the layer summation method. Therefore, the calculation formula can be derived for a composite foundation reinforced with geogrid-encased stone columns. The results of engineering examples show that the settlement result obtained from this method is close to the measured one. Furthermore, the method is more feasible and can be applied in engineering practice, whereas the results calculated with other available methods are more dangerous.关键词
格栅套筒/加筋碎石桩/沉降计算/竖向变形/径向变形/桩土相对滑移Key words
geogrid-encase/reinforced stone column/settlement calculation/vertical deformation/radial deformation/relative slip between pile and soil分类
交通工程引用本文复制引用
贺成斌,赵明华,马缤辉,陈秋南,雷勇..格栅套筒加筋碎石桩复合地基沉降计算方法[J].水利水电科技进展,2017,37(2):88-94,7.基金项目
国家自然科学基金(51308208,41372303) （51308208,41372303）
