模型固废三轴固结不排水剪试验及孔压分析

发布时间：2018-05-28 21:54

本文选题：模型固废 + 三轴试验　；参考：《地下空间与工程学报》2016年06期

【摘要】：采用草炭、石英砂、高岭土按质量比0.5∶1∶1及1∶1∶1人工配制模型固废。通过应力路径三轴仪,对模型固废开展了固结不排水三轴剪切试验研究,获得其强度特性及孔压变化特性。通过两种不同草炭含量模型固废试验结果对比表明,高草炭含量模型固废在相同应变条件下的剪应力比低草炭含量的大,说明草炭含量增加将使得固废内部颗粒相互作用增强,更有利于其强度发挥。根据不排水剪切过程中孔压的变化特性,获得了草炭含量对孔隙水压力系数的影响规律,得出了固废达到破坏条件时该系数的范围,并与以往真实固废的试验结果进行了对比。
[Abstract]:The waste of peat, quartz sand and kaolin was fixed by artificial model of 0.5: 1: 1 and 1:1:1 by mass ratio. By means of the stress path triaxial apparatus, the undrained triaxial shear tests were carried out on the model solid waste, and the strength and pore pressure characteristics were obtained. The results of two different peat content models showed that the shear stress of high peat content model was higher than that of low peat content under the same strain condition, which indicated that the increase of peat content would enhance the particle interaction in solid waste. More conducive to its strength play. According to the variation of pore pressure in undrained shear process, the influence of peat content on pore water pressure coefficient is obtained, and the range of pore water pressure coefficient when solid waste reaches failure condition is obtained, and compared with the experimental results of real solid waste.
【作者单位】：同济大学岩土及地下工程教育部重点实验室;同济大学地下建筑与工程系;上海岩土工程勘察设计研究院有限公司;
【基金】：国家重点基础研究发展计划(973计划)(2012CB719803) 上海市自然科学基金面上项目(13ZR1443800) 中央高校基本科研业务费学科交叉类(面上)项目
【分类号】：TU41

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