吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (2): 446-451.doi: 10.13229/j.cnki.jdxbgxb201702014

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Effect of dehydration on shear strength properties of compacted clayey soil

LIU Han-bing1, ZHANG Hu-zhu1, 2, WANG Jing2   

  1. 1.College of Transportation, Jilin University, Changchun 130022, China;
    2.School of Traffic Science and Engineering, Jilin Jianzhu University, Changchun 130118, China
  • Received:2016-03-01 Online:2017-03-20 Published:2017-03-20

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Abstract: In order to access the performance of compacted soil of highway subgrade in arid and semiarid regions during the service period, the shear strength properties of engineering clayed soil at different dehydration levels were studied by triaxial compression test. The effect of the water loss rate on the shear strength parameters and on the shear strength was studied, and the effect mechanism was analyzed. Taking the water loss rate into consideration, the relationship equations of cohesion, internal friction angle and shear strength were established. Results show that the dehydration of the compacted clayed soil can remarkably improve its shear strength parameters and shear strength. The cohesion, internal friction angle and shear strength all increase with the water loss rate. The cohesion ad shear strength are exponential functions of the water loss rate, but the internal friction angle is a quadratic function of the water loss rate. Dehydration of compacted clayey soil can enhance the load bearing capacity and stability of highway subgrade. This study may provide theoretical and technical reference for the design and construction of clayey soil subgrade in arid and semiarid regions.

Key words: road engineering, shear strength, triaxial compression test, compacted clayey soil, water loss rate, cohesion, internal friction angle

CLC Number: 

  • U416
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