王日升1,2, 赵明阶1.多相土石复合介质推剪破坏响应特征试验研究[J].水电能源科学,2018,36(9):130-133
多相土石复合介质推剪破坏响应特征试验研究
Study on Test of Shearing Response about Multiphase Soil and Rock Composite Mediums
  
DOI:
中文关键词:  土石复合介质  剪切力  位移  抗剪强度  响应特征
英文关键词:soil and rock composite mediums  shear force  displacement  shear strength  response characteristics
基金项目:国家自然科学基金项目(51279219)
作者单位
王日升1,2, 赵明阶1 1.重庆交通大学 河海学院 重庆 400074 2.山东交通学院 交通土建工程学院 山东 济南 250023 
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中文摘要:
      为研究多相土石复合介质推剪破坏响应特征,分别建立土石比为4∶6、5∶5、7∶3的模型,并将模型在不同含水条件下进行推剪试验,得出不同模型在不同条件下抗剪强度指标变化规律及推剪过程中力与位移的响应特征。结果表明,浸水条件下各模型抗剪强度指标均较正常条件时有所降低,粘聚力降幅随土石含量的增大而增大,而内摩擦角约降低10%;浸水条件下各模型剪切破坏力均较正常条件下低,且模型的土石比越大,破坏时所需的剪切力越小,水平位移也越小,但破坏过程中力与位移稳定阶段响应特征更加显著。研究成果可为土石坝在特定土石配比材料下的渗漏破坏检测提供依据,还可为高速公路土石路基填料在相同压实度、不同水环境条件下的设计施工提供参考。
英文摘要:
      In order to study the shearing response of multiphase soil and rock composite mediums, this paper established three kinds of model, whose ratio of soil to rock was 4:6, 5:5, 7:3. The shearing models' experiments were carried out under different water environment. Different models' change laws of shear strength and response characteristics of force displacement under different conditions were obtained. The results indicate that compared with the normal condition, the index of shear strength decreased under immersion condition, and the reduction range of cohesion increased with the increase of soil rock content, the angle of internal friction reduced about 10%. Moreover, the damage shear force of each model in immersion condition was lower than that in normal condition, and the higher the soil to rock ratio is, the lower the shear force of destruction is needed, and the smaller the horizontal displacement is, but the force displacement of stable stage becomes significantly. The results of the study can provide the checking basis of seepage failure detection of earth rock dam in particular ratio of soil to rock, and can also provide reference for the design and construction of expressway subgrade's filler under the same compaction degree and different water environment conditions.
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