| 滨海软基上膜袋围堰稳定性分析及沉降预测研究 |
| |
| 引用本文： | 高峰.滨海软基上膜袋围堰稳定性分析及沉降预测研究[J].岩土力学,2010,31(4):1233-1237. |
| |
| 作者姓名： | 高峰 |
| |
| 作者单位： | 1.武汉大学 水利水电学院，武汉 430072；2.广州市番禹区水务局，广州 511400 |
| |
| 摘 要： | 根据软土地基上膜袋围堰自身特性，考虑土工膜袋纵向抗拉强度的影响，建立了膜袋围堰整体稳定性分析模型，定量研究了土工织物膜袋抗拉力、袋内填充土体强度参数以及膜袋充填厚度对围堰整体安全系数的影响。对膜袋围堰场地进行了现场沉降观测，根据室内软土的固结试验和渗透性试验，结合观测数据对常值参数灰色模型预测方法进行修正，利用修正模型对围堰的长期沉降进行了预测。研究结果表明：围堰整体安全系数随着土工织物膜袋抗拉强度及袋内填充土体强度参数的增大显著增加；随着膜袋充填厚度增大，围堰整体安全系数先迅速降低，后趋于稳定。软土地基的固结特性与其长期沉降有紧密关系，实际预测时应根据不同软土的固结性质选取沉降预测模型，以提高预测精度。
|
| 关 键 词： | 滨海软基 膜袋围堰 稳定性 安全系数 沉降预测 |
| 收稿时间： | 2010-01-05 |
Analysis of stability and settlement prediction of cofferdam with geotextile bags on seaside soft foundation |
| |
| GAO Feng.Analysis of stability and settlement prediction of cofferdam with geotextile bags on seaside soft foundation[J].Rock and Soil Mechanics,2010,31(4):1233-1237. |
| |
| Authors: | GAO Feng |
| |
| Institution: | 1.School of Water Resources and Hydropower ,Wuhan University ,Wuhan 430072 ,China; 2. Water Affairs Bureau of Fanyu District, Guangzhou 511400, China |
| |
| Abstract: | The analysis model of integral stability of cofferdam with geotextile bags on seaside soft foundation is established based on the characteristics of the cofferdam. The effects of the tensile strength of geotextile bags, the cohesion force of filled sand-silt mixture and the depth of geotextile bag on the stability safety factor are investigated when the longitudinal tensile force of bags are taken into consideration. The field observation of long term settlement of the cofferdam is performed. According to the consolidation test and the permeability test of soft foundation, a new model of settlement prediction is proposed by modifying the classical Grey Model. It is found that the integral safety factor increases significantly with the increase of the tensile strength of geotextile bags and the cohesion force of filled sand-silt mixture, and decreases rapidly first and then tends to be stable with the increase of the filled soil depth. The consolidation characteristics of soft soil have influence on the long-term settlement of foundation. Therefore, a reasonable predictive model involving consolidation properties of different soft soils should be chosen to improve the predictive precision. |
| |
| Keywords: | seaside soft foundation cofferdam with geotextile bags stability safety factor settlement prediction |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
