| 太湖软土地基沉降特性分析 |
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| 引用本文： | 张 涛,刘松玉,蔡国军.太湖软土地基沉降特性分析[J].岩土力学,2015,36(Z1):253-259. |
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| 作者姓名： | 张 涛 刘松玉 蔡国军 |
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| 作者单位： | 1. 东南大学 岩土工程研究所，江苏 南京 210096； 2. 东南大学 江苏省城市地下工程与环境安全重点实验室，江苏 南京 210096 |
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| 基金项目： | 国家自然科学基金（No.41330641，No.41202203）；江苏省杰出青年基金（No.BK20140027）；全国优秀博士学位论文作者专项资金（No.201353）；教育部新世纪优秀人才支持计划（No.NCET-13-0118）；中央高校基本科研业务费（No.2242013R30014）；江苏省交通科学研究计划项目（No.2013Y04）。 |
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| 摘 要： | 根据太湖地区某高速公路路基沉降实测资料，通过现场原位取样结合室内试验，分析了太湖冲湖积相软土的压缩特性，总结出软土路基的沉降变化规律，研究了工程地质条件和填土高度对路基沉降的影响，并采用归一化指标得到不同地基处理方式下的沉降估算公式，同时对两种常用全过程路基沉降预测方法进行了比较。结果表明，太湖冲湖积相软土具有较强的结构性；相似地质条件下的路基沉降差异较大，土体结构性是影响路基沉降的重要因素之一；归一化指标分析可得到不同路基处理方式下的简单沉降估算式；常用的全过程沉降量预测方法对于最终沉降量的预测均存在一定的偏差，可综合分析预测结果得到较为准确的预测值。
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| 关 键 词： | 高速公路 超载预压 结构性土 沉降 湖积软土 |
| 收稿时间： | 2015-03-06 |
Research on settlement of soft soil ground in Taihu |
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| ZHANG Tao,LIU Song-yu,CAI Guo-jun.Research on settlement of soft soil ground in Taihu[J].Rock and Soil Mechanics,2015,36(Z1):253-259. |
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| Authors: | ZHANG Tao LIU Song-yu CAI Guo-jun |
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| Institution: | 1. Institute of Geotechnical Engineering, Southeast University, Nanjing, Jiangsu 210096, China;
2. Jiangsu Key Laboratory of Urban Underground Engineering and Environmental Safety, Southeast University, Nanjing, Jiangsu 210096, China |
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| Abstract: | According to the time-settlement data of an expressway in Taihu Lake region and the laboratory test results, the compression characteristic of alluvial lacustrine soft soil and the variation of settlement for subgrade are analyzed. The effect of engineering geological conditions and depth of fill on settlement of subgrade are investigated. The normalized index is used to estimate the settlement of subgrade. Meanwhile, two kinds of commonly used whole process subgrade settlement prediction methods are compared. The results show that the alluvial lacustrine soft soil in Taihu Lake region is a strong structured soil. The settlement of subgrade at similar geological conditions is quite different and soil structure is one of the important factors affecting the settlement of subgrade. A simple formula for estimating settlement is obtained with the analysis of normalized index. The whole process settlement prediction methods commonly used for the final settlement prediction have certain deviation; a more accurate estimated value of settlement can be got by comprehensive analysis. |
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| Keywords: | expressway surcharge preloading structured soils settlement lacustrine soft soil |
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