考虑软土流变特性的沉降预测模型研究

›› 2006, Vol. 27 ›› Issue (9): 1567-1570.

考虑软土流变特性的沉降预测模型研究

王志亮¹，黄景忠²，杨夏红³

1.中国科学技术大学力学与机械工程系，合肥 230027；2.郑州大学环境与水利学院，郑州 450002； 3.安徽水安建设发展股份有限公司，合肥 230022

收稿日期:2004-02-03 出版日期:2006-09-11 发布日期:2013-11-28
作者简介:王志亮，男，1969年生，博士后，主要从事于岩土工程、爆破工程力学、计算力学等方面研究

Study on settlement prediction model considering rheological properties of soft soils

WANG Zhi-liang¹, HUANG Jing-zhong², YANG Xia-hong³

1. Department of Mechanics, University of Science and Technology of China, Hefei 23009, China; 2. College of Environmental and hydraulic Engineering, Zhengzhou University, Zhenzhou 450002, China; 3. Anhui Shui-an Construction & Development Share Co.Ltd, Hefei 230022, China

Received:2004-02-03 Online:2006-09-11 Published:2013-11-28

摘要/Abstract

摘要： 增长曲线模型自身的特点决定了其能很好地预测地基沉降的发展趋势。先将该模型推广到多级填土荷载下的路堤沉降预测中，接着基于绝对时间坐标系下的软土次压缩计算式，提出了带软土流变项的新型增长曲线模型，并采用数学中的最优化技术，结合前期沉降实测资料对模型中待定参数进行反演。实例计算表明：该模型对沉降预测精度高，能合理地反映出土颗粒骨架的蠕变过程，且能较准确地给出不同时刻的次压缩量，具有一定的工程参考价值。

关键词: 软土, 流变特性, 沉降预测, 增长曲线模型, 0.618法

Abstract: The logistic model can well predict the developing trend of foundation settlement with its own virtues. Firstly, it is extended to settlement predication of embankment subjected to multistage loadings due to filled soil, and then one new type logistic model coupled with rheological term of soft soil is put forward based on the secondary compression calculation formula under the absolute time coordinates. The relevant parameters are back-analyzed with the optimizing technology of mathematics according to filed measured settlements. It is seen that this new model has higher predicted accuracy and can reasonably reflect the creeping course of soft soil grain skeleton. Besides, the quantity of secondary compression at different times can also be accurately given. The results obtained in this paper may be useful in engineering.

Key words: soft soil, rheological property, settlement prediction, logistic model, 0.618 method

中图分类号:

TU 433

王志亮，黄景忠，杨夏红，. 考虑软土流变特性的沉降预测模型研究[J]. , 2006, 27(9): 1567-1570.

WANG Zhi-liang , HUANG Jing-zhong , YANG Xia-hong，. Study on settlement prediction model considering rheological properties of soft soils[J]. , 2006, 27(9): 1567-1570.

参考文献

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