| 平面应变条件下水泥土强度特性试验研究 |
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| 引用本文： | 宋新江,徐海波.平面应变条件下水泥土强度特性试验研究[J].岩土力学,2011,32(8):2325-2330. |
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| 作者姓名： | 宋新江 徐海波 |
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| 作者单位： | 安徽省水利部淮河水利委员会水利科学研究院,安徽蚌埠,233000 |
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| 基金项目： | 水利部公益性行业科研专项(No.201101012) |
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| 摘 要： | 通过水泥土平面应变试验和三轴压缩固结排水试验(CD试验),对水泥土力学特性进行研究,讨论两种试验条件下水泥土的应力-应变曲线变化特点和强度特性。试验结果表明,水泥土的应力-应变曲线为软化型,软化程度与围压有关,平面应变条件下水泥土软化明显;CD试验和平面应变试验的强度破坏线均为直线,可用摩尔-库仑强度准则来描述;两种试验条件下的残余强度均随围压的增加呈线性增大,其中平面应变试验残余强度高于CD试验,残余强度与峰值强度的比值随围压的增大而增大,增大速率减小;平面应变条件下,水泥土的破坏强度约为三轴CD试验的1.4～1.6倍。从微观结构和能量守恒原理解释了CD试验和平面应变试验水泥土软化成因,认为水泥水化物等凝胶材料是水泥土软化的主要因素,且中主应力的存在使水泥土软化更加明显。
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| 关 键 词： | 水泥土 平面应变试验 三轴固结排水试验 强度 |
| 收稿时间： | 2011-02-14 |
Experimental study of strength characteristics of cement-soil under plane strain condition |
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| SONG Xin-jiang,XU Hai-bo.Experimental study of strength characteristics of cement-soil under plane strain condition[J].Rock and Soil Mechanics,2011,32(8):2325-2330. |
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| Authors: | SONG Xin-jiang XU Hai-bo |
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| Institution: | Anhui and Huaihe River Water Resources Research Institute, Bengbu, Anhui 233000, China |
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| Abstract: | In order to study the mechanical property of cement-soil,the plane strain tests and consolidated drained triaxial(CD) tests are carried out.Characteristics and strength properties of stress-strain curve of cement-soil are discussed.The results show that the stress-strain curve has softening behavior;the softening degree is related to confining pressure and it is obvious under the condition of plane strain state;the strength failure envelopes of both CD test and plane strain test are linear and the Mohr-Coul... |
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| Keywords: | cement-soil plane strain test consolidated drained triaxial(CD) test strength |
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