摘要
通过对50幢多层建筑沉降观测资料的分析,研究了上海软土地区多层建筑的长期沉降。对竣工以后的观测数据采用指数模型进行回归分析,可以反映软黏土的流变特性,较好地模拟建筑物后期的沉降发展过程,从而预测得到最终沉降量和沉降稳定时间。根据指数模型的分析结果,并引入地基压缩层内的软黏土厚度所占比例的概念,研究了多层建筑长期沉降与地基土层特性的关系。结果表明,最终沉降和沉降持续时间随着软黏土厚度比例的增加而增大,竣工时沉降占总沉降的比例随着软黏土厚度比例的增大而下降,并且具有线性关系。
The long-term settlement behavior of multi-story buildings on soft clay foundation in Shanghai is analyzed based on the long-term observed data of 50 multi-story buildings. Exponential model can reflect creep deformation of soft clay, which has obvious physical meaning of theology. The long-term settlement of building is simulated well by analyzing the observed settlements after construction with the exponential model; and the final settlement and settlement duration are predicted. Considering the variation of thickness ratio （Ks） of very soft clay layers in the four types of subsoil, relationship between Ks and long-term settlement of building is obtained from analysis of all records. With the increase of Ks, the final settlement and settlement duration increase, while the ratio of settlement finished during construction is decreasing.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2006年第6期991-994,共4页
Rock and Soil Mechanics
关键词
长期沉降
多层建筑
软土
指数模型
long-term settlement
multi-story building
soft clay
exponential mode
