Dynamic Stress Response Characteristics within Soil and Influence of pH under Cyclic Loading

TANG Lian-sheng; WU Yan-ping; ZHAO Zhan-lun; ZHAO Lu; CHEN Hao-kun

doi:10.11988/ckyyb.20180622

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Journal of Changjiang River Scientific Research Institute ›› 2019, Vol. 36 ›› Issue (12) : 78-82. DOI: 10.11988/ckyyb.20180622

ROCKSOIL ENGINEERING

Dynamic Stress Response Characteristics within Soil and Influence of pH under Cyclic Loading

TANG Lian-sheng^1,2, WU Yan-ping¹, ZHAO Zhan-lun¹, ZHAO Lu¹, CHEN Hao-kun¹

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Abstract

Indoor cyclic loading test was performed on residual soil of granite with varied pH value to obtain the dynamic stress response and the influence of pH value on it under cyclic loading. The dynamic stress response was measured by stress meters embedded in the specimens. Results illustrated that the dynamic stress response and cumulative deformation both increased with the proceeding of cyclic loading. The peak stress of dynamic stress response within acid or alkali treated specimens increased significantly during loading. After unloading, the residual stress of alkali treated samples also increased; with the increase of alkalinity, the increment of peak stress and residual stress augmented. The dynamic stress response and deformation response of alkaline samples were greater than those of acidic and non-treated samples. The additional stress within soil lagged behind strain, and the strain lagged behind the external load. The pH value had great influence on the dynamic stress response of granite residual soil, and therefore should be paid attention to in practical engineering.

Key words

granite residual soil / dynamic stress / cumulative deformation / cyclic loading / pH value

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TANG Lian-sheng, WU Yan-ping, ZHAO Zhan-lun, ZHAO Lu, CHEN Hao-kun. Dynamic Stress Response Characteristics within Soil and Influence of pH under Cyclic Loading[J]. Journal of Changjiang River Scientific Research Institute. 2019, 36(12): 78-82 https://doi.org/10.11988/ckyyb.20180622

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