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Full-Text Articles in Geotechnical Engineering
Experimental Study On Shear Strength Of Unsaturated Soil Over A Wide Suction Range And Its Prediction, Geng Niu, Xiao-Feng Zhu, Jun-Xing Li, Meng-Yuan Lü, Li-Qi An, Zi-Han Chen
Experimental Study On Shear Strength Of Unsaturated Soil Over A Wide Suction Range And Its Prediction, Geng Niu, Xiao-Feng Zhu, Jun-Xing Li, Meng-Yuan Lü, Li-Qi An, Zi-Han Chen
Rock and Soil Mechanics
In this paper, the experimental studies on the water retention and strength properties of unsaturated weakly expansive soil in a wide suction range were carried out, and a strength model of unsaturated soil over a wide suction range was proposed. The results show that in the wide suction range, the stress‒strain curve increases with the increase of suction. The strain hardening occurs in the low suction range, while the strain softening appears in the high suction range. In the low suction range, the sample presents shear contraction, while in the high suction range, the sample begins to show a shear …
Shear Strength Characteristics Of Unsaturated Rubber Silt Mixtures, En-Quan Zhou, Yuan Yao, Lei Cui, Long Wang
Shear Strength Characteristics Of Unsaturated Rubber Silt Mixtures, En-Quan Zhou, Yuan Yao, Lei Cui, Long Wang
Rock and Soil Mechanics
To study the shear strength characteristics of unsaturated rubber silt mixtures, a series of direct shear tests was conducted on the rubber silt mixtures with different rubber particle contents and water contents. Based on the particle contact state theory, the meso contact mode of rubber silt mixtures was constructed, and the calculation method of rubber silt mixtures skeleton void ratio based on different rubber content was obtained. The test results show that the shear strength of rubber silt mixtures decreases with the increase of skeleton void ratio at a low water content, while the strength of rubber silt mixtures increases …
An Improved Shear Strength Model Of Unsaturated Soils Over A Wide Suction Range, Yu-Xin Zhao, Xu Li, Sen Lin, Xiao-Meng Wang
An Improved Shear Strength Model Of Unsaturated Soils Over A Wide Suction Range, Yu-Xin Zhao, Xu Li, Sen Lin, Xiao-Meng Wang
Rock and Soil Mechanics
Different types of unsaturated soils are widespread in nature. Due to the differences in grain size and mineral composition, the shear strength characteristics of the unsaturated soils are significantly different over a wide suction range. In order to establish a unified model for predicting the shear strength of different soil types over a wide suction range, a systematic investigation was carried out to examine the effect of soil type on the shear strength of unsaturated soils. An improved shear strength model is proposed based on the advantages of two traditional equations. The proposed model is verified by comparing the published …
Experimental Research On The Shear Characteristics Of The Composite Liner Consisting Of Wrinkled Geomembrane And Needle Punched Geosynthetic Clay Liner, Hai Lin, Yi-Fan Zeng, Chuang-Bing Zhou, Ping-Xiao Dong, Jian-Yong Shi
Experimental Research On The Shear Characteristics Of The Composite Liner Consisting Of Wrinkled Geomembrane And Needle Punched Geosynthetic Clay Liner, Hai Lin, Yi-Fan Zeng, Chuang-Bing Zhou, Ping-Xiao Dong, Jian-Yong Shi
Rock and Soil Mechanics
Wrinkles in geomembrane are common among anti-seepage engineering. However, the wrinkling effect has been neglected in most of the current studies on the interface shear properties of geomembrane. The composite liner consisting of a textured geomembrane (GM) and a needle punched geosynthetic clay liner (GCL) was taken as the research object, and the hydration deformation tests confirmed that the two-step hydration method was effective in accelerating the hydration of the wrinkled GM+GCL composite liner. The shear properties of the wrinkled GM+GCL composite liner was studied by a large-scale temperature-controlled submerged direct shear apparatus. The shear characteristic of the wrinkled GM+GCL …
Mechanical Properties Of Saline Soil Solidified With Lime, Fly Ash And Modified Polyvinyl Alcohol Under Freeze-Thaw Cycles, Min Li, He-Miao Yu, Hong-Pu Du, Bao-Yu Cao, Shou-Xi Chai
Mechanical Properties Of Saline Soil Solidified With Lime, Fly Ash And Modified Polyvinyl Alcohol Under Freeze-Thaw Cycles, Min Li, He-Miao Yu, Hong-Pu Du, Bao-Yu Cao, Shou-Xi Chai
Rock and Soil Mechanics
The repeated freeze-thaw cycles with seasonal alternations have an obvious effect on soil structure. To reduce the temperature sensitivity of saline soil and then use it in engineering, a combined treatment method is proposed, where lime, fly ash and modified polyvinyl alcohol (MPA) are used as solidified materials. Unconfined compressive strength (UCS) tests and microstructure characterization are firstly used to evaluate the solidified effect and obtain the parameters range of solidified materials. Then, the shear strength tests for determining cohesion and internal friction angle are conducted. Experiments are conducted by considering separate and combined treatments of materials mentioned above. The …
Improvement Of Slope Soil Consolidation Capacity Of Plant Root System Based On Regulation Of Root Architecture, Zhen-Yu Li, Miao Ouyang, Hong-Bin Xiao, Ju-Shan Wang, Tao Li, Si-Si Liu
Improvement Of Slope Soil Consolidation Capacity Of Plant Root System Based On Regulation Of Root Architecture, Zhen-Yu Li, Miao Ouyang, Hong-Bin Xiao, Ju-Shan Wang, Tao Li, Si-Si Liu
Rock and Soil Mechanics
The effect of plant slope protection is strongly associated with the root architecture in soil. In this paper, the water?fertilizer combination method was used to regulate the plant root configuration, and the influence of the regulated plant root architecture on the slope soil strength was studied. In terms of the practice of highway slope engineering, a field fill slope for test was made. Vetiver was selected as slope protection species, and 9 groups of water?fertilizer combinations were designed to regulate the root architecture of plant in slope soil. After 10-months growth, the roots of plants on the slope were counted …
Shear Strength Calculation Model Of Rock Joints Based On Three-Dimensional Morphology Of Joint Surface, Lei-Lei Jin, Yu-Feng Wei, Xin Huang, Jie Wei
Shear Strength Calculation Model Of Rock Joints Based On Three-Dimensional Morphology Of Joint Surface, Lei-Lei Jin, Yu-Feng Wei, Xin Huang, Jie Wei
Rock and Soil Mechanics
The JRC-JCS model, which is widely used in the field of geotechnical engineering, has the following defects: 1) the two-dimensional joint roughness coefficient (JRC) can’t comprehensively represent the anisotropy of joint surface morphology; 2) the joint compressive strength (JCS) of joint wall can’t entirely reflect the influence of material properties on joint shear mechanical behavior. In this paper, artificial joint samples with natural joint morphology were poured based on three-dimensional laser scanning and three-dimensional printing technology, and shear tests under constant normal stress were carried out. The shear strength model with three-dimensional morphology parameters and tensile strength parameters was established …