基于差异沉降控制的地基基础优化设计方法  

Optimized Design Method of Foundation Based on Differential Settlement

作　　者：周峰[1,2] 刘松玉[1] 刘壮志[2] 

机构地区：[1]东南大学交通学院,江苏南京210096 [2]南京工业大学土木工程学院,江苏南京210009

出　　处：《沈阳建筑大学学报（自然科学版）》2009年第6期1077-1083,共7页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(50678083);江苏省高校自然科学基础研究项目(08KJB560002);江苏省博士后科研基金项目(0802011B)

摘　　要：目的为减小建筑物基础的差异沉降，针对天然地基、复合地基以及复合桩基，提出基于差异沉降控制的地基基础优化设计方法．方法通过优化天然地基、复合地基以及复合桩基在桩基平面内的支承刚度，建立地基基础支承体刚度人为优化的数值计算模型，分析了上述方法控制差异沉降的效果．结果通过人为优化支承刚度分布的方法，天然地基、复合地基以及复合桩基上基础的弯矩平均减少80％，不均匀沉降平均减少75％-90％，近似达到零差异沉降的目标．结论笔者方法可显著地减少基础的弯矩和差异沉降，对工程设计具有一定的借鉴作用．In order to reduce differential settlement of foundation, the paper aims at proposing optimum design methods of subgrade and foundation based on differential settlement control for subgrade, composite foundation and composite pile foundation. Bearing rigidity of subgrade, composite foundation and composite pile foundation should be optimized in plane of pile foundation, and numerical calculation model of bearing rigidity optimized by authors were built up. Consequently, result of these methods to control differential settlement can be analyzed. Bending moment of foundation on subgrade, composite foundation and composite pile foundation reduced 80% averagely, and differential settlement reduced 75% -90% averagely through optimum design methods. The goal of zero differential settlement was reached approximately. Result of numerical computation shows that the methods above could reduce internal force of foundation and differential settlement significantly, and could be used for reference by engineering project.

关 键 词：差异沉降 优化设计 天然地基 复合地基 复合桩基 

分 类 号：TU470[建筑科学—结构工程]