上海软土地区多层建筑物长期沉降特性

›› 2006, Vol. 27 ›› Issue (6): 991-994.

上海软土地区多层建筑物长期沉降特性

马桂华¹，陈锦剑¹，王建华¹，周红波²

1. 上海交通大学土木工程系，上海 200030；2. 上海市建筑科学研究院，上海 200030

收稿日期:2004-09-10 出版日期:2006-06-10 发布日期:2013-11-14
通讯作者: 王建华，教授，博士生导师，E-mail: wjh417@sjtu.edu.cn
作者简介:马桂华，男，1979年生，硕士研究生，研究方向为软土地区建筑物长期沉降特性。

Long-term settlement of multi-story buildings on soft clay foundation in Shanghai

MA Gui-hua¹, CHEN Jin-jian¹, WANG Jian-hua¹, ZHOU Hong-bo²

1. Department of Civil Engineering, Shanghai Jiaotong University, Shanghai 200030, China; 2. Shanghai Research Institute of Building Sciences, Shanghai 200030, China

Received:2004-09-10 Online:2006-06-10 Published:2013-11-14

摘要/Abstract

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。

关键词: 长期沉降, 多层建筑, 软土, 指数模型

Abstract: 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 rheology. 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.

Key words: long-term settlement, multi-story building, soft clay, exponential mode

中图分类号:

TU 471

马桂华，陈锦剑，王建华，周红波 . 上海软土地区多层建筑物长期沉降特性[J]. , 2006, 27(6): 991-994.

MA Gui-hua , CHEN Jin-jian , WANG Jian-hua , ZHOU Hong-bo . Long-term settlement of multi-story buildings on soft clay foundation in Shanghai[J]. , 2006, 27(6): 991-994.

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