蒋明杰, 朱俊高, 梅国雄. 粗粒土静止侧压力系数影响因素试验研究[J]. 工程力学, 2020, 37(3): 142-148. DOI: 10.6052/j.issn.1000-4750.2019.04.0199
引用本文: 蒋明杰, 朱俊高, 梅国雄. 粗粒土静止侧压力系数影响因素试验研究[J]. 工程力学, 2020, 37(3): 142-148. DOI: 10.6052/j.issn.1000-4750.2019.04.0199
JIANG Ming-jie, ZHU Jun-gao, MEI Guo-xiong. EXPERIMENTAL STUDY ON INFLUENCE FACTORS OF LATERAL PRESSURE COEFFICIENT AT REST FOR COARSE GRAINED SOIL[J]. Engineering Mechanics, 2020, 37(3): 142-148. DOI: 10.6052/j.issn.1000-4750.2019.04.0199
Citation: JIANG Ming-jie, ZHU Jun-gao, MEI Guo-xiong. EXPERIMENTAL STUDY ON INFLUENCE FACTORS OF LATERAL PRESSURE COEFFICIENT AT REST FOR COARSE GRAINED SOIL[J]. Engineering Mechanics, 2020, 37(3): 142-148. DOI: 10.6052/j.issn.1000-4750.2019.04.0199

粗粒土静止侧压力系数影响因素试验研究

EXPERIMENTAL STUDY ON INFLUENCE FACTORS OF LATERAL PRESSURE COEFFICIENT AT REST FOR COARSE GRAINED SOIL

  • 摘要: 目前,适用于测试粗粒土K0值的试验仪器及方法较少,关于粗粒土K0影响因素的研究几乎空白。为研究分析粗粒土K0影响因素,利用新近研制的大型K0测试仪对某砂卵砾石料进行了大量K0试验。通过改变试样的相对密实度Dr0与颗粒最大粒径dM等初始条件,研究了粗粒土在不同试验条件下K0的变化规律。试验结果表明:粗粒土的Dr0K0存在线性负相关关系;颗粒最大粒径dMK0呈负相关关系,可近似用幂函数表示;K0随着竖向应力σ'v的增加呈减小趋势,而且较低竖向应力下这种趋势显著。

     

    Abstract: At present, there are few apparatuses and methods applicable for measuring K0 of coarse-grained soil, and the relevant research about the effect factors of K0 for coarse-grained soil is almost blank. To investigate the effect factors of K0 for coarse-grained soil, several K0 tests for a sandy gravel were performed by using a newly-developed large-size K0 apparatus. By changing the initial conditions such as initial relative density Dr0 and maximum grain size dM, the K0 behavior of coarse-grained soil under different experimental conditions is investigated. The test data show that:a linear negative correlation exists between K0 and Dr0 for coarse-grained soil; a negative correlation exists between K0 and dM for coarse-grained soil, and the correlation can be expressed by a power function; K0 trends to decrease with the increase of effective vertical stress σ'v, and the effect of σ'v on K0 is more pronounced under low σ'v.

     

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