| 软土e-p曲线确定的简化方法及在非线性沉降计算中的应用 |
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| 引用本文： | 彭长学,杨光华.软土e-p曲线确定的简化方法及在非线性沉降计算中的应用[J].岩土力学,2008,29(6):1706-1710. |
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| 作者姓名： | 彭长学 杨光华 |
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| 作者单位： | 1. 华南理工大学,建筑设计研究院,广州,510641
2. 广东省水利水电科学研究院,广州,510610 |
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| 摘 要： | 首先假设软土的压缩曲线符合双曲线方程,并通过某工程一系列的数据进行验证,验证结果表明双曲线假定比较符合软土压缩曲线;由于双曲线方程参数相对较少,数据拟合确定比较简单易行,可对实际工程软土地基沉降进行简化计算并能满足工程的精度要求;同时还针对目前地质报告一般不提供详细的孔隙比-压缩应力(简称e-p)试验数据的情况,对e-p双曲线方程提出了一个只采用初始孔隙比e0、压缩模量Es来确定其参数的简化方法.在此基础上,基于e-p曲线确定邓肯-张模型的切线模量臣,采用分层总和法应用于软土地基的非线性沉降计算.对计算结果与实测数据进行比较分析表明,所提出的方法是切实可行的.
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| 关 键 词： | e-p曲线 软土地基 非线性 沉降计算 软土地基 双曲线 简化方法 非线性 沉降计算 应用 foundation settlement nonlinear analyzing application soft soil curve 分析表 实测数据 分层总和法 切线模量 模型 邓肯 压缩模量 |
| 收稿时间： | 2006-12-05 |
A simplified method for determining e-p curve of soft soil and its application to analyzing nonlinear settlement of foundation |
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| PENG Chang-xue,YANG Guang-hua.A simplified method for determining e-p curve of soft soil and its application to analyzing nonlinear settlement of foundation[J].Rock and Soil Mechanics,2008,29(6):1706-1710. |
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| Authors: | PENG Chang-xue YANG Guang-hua |
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| Institution: | 1. Archiecture Design and Research Institute, South China University of Technology, Guangzhou 510641, China; 2. Guangdong Research Institute of Water Resources and Hydropower, Guangzhou 510610, China |
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| Abstract: | Firstly, an assumption that the compressibility curve of soft soil fits in with the hyperbolic equation is adopted; and it is validated by a series of data in a certain project. Since there are only a few parameters of hyperbolic equation,it is simple and feasible to use data fitting.Thus a simplified calculation can be introduced to the practical calculation of soft soil foundation and meets the accuracy requirement of a project.And then under the circumstance of not having adequate e-p experimental data in a geological report, a simplified approach is put forward to determine parameters of e-p hyperbolic equation with initial void ratio e0 and compressive modulus Es. Finally, based on the above-mentioned method of e-p curve, we acquire tangential modulus(Et) of Duncan-Chang model and with the Layer-wise Summation method(LST) apply it to the nonlinear settlement calculation of soft soil foundation. By comparing the tested settlements with the calculated ones, it is shown that the simplified method is capable and practicable. |
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| Keywords: | e-p curve soft soil foundation nonlinearity settlement calculation |
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