Shear characteristics and mesoscopic damage mechanism of long time soaking red sandstone under loading and unloading conditions [PDF]
The bank slope rock mass below the flood control restricted water level (145 m) in the Three Gorges Reservoir area has experienced long-term immersion in the process of reservoir water lifting and lowering; the water level changes lead to the rock mass ...
Binghao ZHOU +4 more
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Shear strength and crushing characteristics of calcareous sand in South China Sea under the influence of three factors [PDF]
Calcareous sand, a type of marine soil found in the South China Sea, is characterized by its porous nature, irregular particle shape, and susceptibility to breakage. However, few studies have examined the mechanical properties of calcareous sand from the
Hao YANG +3 more
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A Study on Characterisitics and Engineering Technical Problems of Granite Residual Soil in Xiamen Area [PDF]
, 2011 花岗岩残积土在我国南方地区分布广泛，由于其特殊的成因和性质，在花岗岩残积土施工中常常出现一些工程事故，导致经济和财产损失。本文主要针对厦门地区的花岗岩残积土进行研究，论文主要的工作和取得的成果如下： 1）总结概述了厦门地区工程地质情况，分析和评述了岩土工程地质条件对工程建设的适宜性。 2）分析了厦门地区花岗岩残积土的成因；测定花岗岩残积土试样的粒度组成、颗粒级配和物理力学性质；总结厦门地区花岗岩残积土特征，分析了物理力学性质各个指标的相关性；并根据分析结果，对厦门地区花岗岩残积土进行重新分类。 3 ...
杨丽娟
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Shuitu Baochi Xuebao, 2021 为揭示冻融循环作用对棕壤抗剪强度的影响，采集沈阳地区5 cm和25 cm 2个深度原状棕壤（分别为H5和H25）为研究对象，通过室内冻融循环模拟和土壤直剪试验，研究冻融循环次数和土壤含水率对土壤抗剪强度的影响。结果表明：（1）土样含水率越高，初次冻融作用的破坏效果越强，1次冻融循环后，含水率为25%的H5和H25土样黏聚力分别下降50.00%和25.87%；含水率35%的H5和H25土样黏聚力分别下降75.61%和50.77%。15次冻融循环后，含水率10%的H5和H25土样黏聚力分别增加74.36 ...
朱龙祥 +5 more
doaj
Shuitu Baochi Xuebao, 2018 为研究不同根系布置方式（方形、梅花形、环形）对草本植物根—土复合体抗剪强度影响，引入面积置换率的概念，解决了相同含根量或相同根数时无法同时满足方形、梅花形和环形布置的难题。在此基础上选取中国过渡带北侧山地土壤与莎草科植物开展植物根—土复合体抗剪强度试验研究，分析了相同布置形式下含根量对根—土复合体抗剪强度的影响、根系布置方式（方形、梅花形、环形）对草本植物根—土复合体抗剪强度增强作用以及抗剪强度指标变化规律。结果表明：根—土复合体试样的抗剪强度和黏聚力随着含根量的增大而逐渐增加；根 ...
王保辉, 朱连奇
doaj
Numerical study on the mechanism of shear performance degradation of thawing glacial debris [PDF]
The sensitivity of the ice-water transition in glacial debris to temperature rise has become a significant concern. In recent years, there has been an increase in reports of ice avalanches caused by the thawing of glacial debris, which can be attributed ...
Da HUANG +4 more
core +1 more source
Shuitu Baochi Xuebao, 2016 通过野外调查与室内试验相结合的方法，对比分析不同土地利用方式土壤抗剪强度及其影响因子的关系，以期为研究区域不同土地利用方式水土流失评价提供一定科学依据。选取针阔混交林、灌木林、园地、坡耕地、荒地5种土地利用方式，观测土壤抗剪强度指标、容重、含水率、干密度、总孔隙度、土壤团聚体MWD值、粉/黏粒值，运用灰色关联法分析影响土壤抗剪强度的因素。结果表明：同一种土地利用方式土壤的黏聚力从坡上到坡下逐渐减小；不同土地利用方式土壤抗剪强度大小顺序为：坡耕地＞园地＞针阔混交林＞荒地＞灌木林 ...
李 想, 王 瑄, 盛世博, 陈志强
doaj
Experimental Study on Static and Dynamic Characteristics of Residual Soil and Improved Soil in One Site in Zhangzhou Developing Zone [PDF]
, 2012 论文以残积土及其改良土的静、动力特性试验研究为主题，选取漳州开发区某工地残积土为试样，利用无侧限压缩仪、静三轴仪和动三轴仪为主要试验设备，测试试样的静力特性和动力反应，从而研究含水率、水泥掺入量等因素对残积土及其改良土的静、动力特性的影响。主要研究内容如下： （1）制备不同含水率和不同水泥掺入量的土样，进行无侧限抗压强度试验，测定其应力—应变曲线，通过试验结果分析，研究试样极限抗压强度随含水率、水泥掺入量变化关系。 （2）进行静三轴固结不排水试验，测定不同含水率和不同水泥掺入量的土样的应力—应变曲线 ...
朱梦芸
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Modification method of borehole shear mechanical parameter characterization and its experimental study [PDF]
The borehole shear test is an important method to quickly measure the shear strength of rock in the field, but its application is limited due to its large measurement error.
Bingyuan CUI +8 more
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MECHANISM OF PROGRESSIVE FAILURE OF A KIND OF FAULTED ROCK SLOPE DUE TO SLIP-WEAKENING [PDF]
, 2004 含裂隙的岩土材料在剪切作用下,随着剪应变的增加,裂纹端部一定区域内的强度会表现出滑动弱化的现象.岩土材料这种性质的变化不同于粘性土结构性破坏,也不同于剪胀.在一定的载荷作用下,坡体内裂隙端部的滑动弱化使坡体内的应力重新分配,从而使得应力集中加剧,裂隙尖端进一步扩展,造成岩体结构性的破坏,乃至整个滑面的贯通直至发生滑坡.因此 ...
丁桦, 孟祥跃, 张均锋, 徐永君
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