首页|A Method for Determining Yield Stress of Unsaturated Soils from Lateral Pressure

A Method for Determining Yield Stress of Unsaturated Soils from Lateral Pressure

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  • NETL
  • NSTL
  • Amer Soc Testing Materials
Predicting the stress–strain behavior of unsaturated soils is essential for determining yieldstress. This paper explores a new method for determining the yield stress of unsaturated soilsfrom the lateral pressure curve. A series of earth pressure at rest (K_0) ondometer tests wereconducted on unsaturated Yangqin silt clay. Lateral stress was obtained under different saturationsand compactness. The relationship curves between lateral and vertical net stress weredrawn for each condition. An obvious turning point was observed in the curve, which can beused to determine the yield stress. The oedometer tests were conducted, and the Casagrandeand the bilogarithmic methods were used for comparison purposes. The difference betweenthe proposed and traditional methods was less than 17 %. The initial saturation and compactnessinfluence on the yield stress was discussed. The yield stress increased with the decrease insaturation and increases in compactness, which is consistent with that of the classic method.The test results and comparison prove the rationality of the proposed method. No coordinatetransformation is required in the proposed method, which is more convenient for data processing.It can be used to determine the yield stress of unsaturated soils from another perspective.

yield stressK_0 oedometer testlateral pressureunsaturated soil

Yan Liu、Xiang Wang、Yuxin Zhao、Lihong Chen、Xu Li

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Key Laboratory of UrbanUnderground Engineering ofMinistry of Education, BeijingJiaotong University,3 Shangyuanchun St., HaidianDistrict, Beijing 100044, China

Key Laboratory of UrbanUnderground Engineering ofMinistry of Education, BeijingJiaotong University,3 Shangyuanchun St., HaidianDistrict, Beijing 100044, China||China Academy of Safety Scienceand Technology, SecurityBuilding, Building A 1, 32 BeiyuanSt., Chaoyang District, Beijing100012, China

Key Laboratory of UrbanUnderground Engineering ofMinistry of Education,Beijing Jiaotong University,3 Shangyuanchun St., HaidianDistrict, Beijing 100044, China

2024

10.1520/GTJ20240001

Geotechnical testing journal

Geotechnical testing journal

SCI
ISSN：0149-6115
年,卷(期)：2024.47(6)
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