镇江地区下蜀土抗剪强度水敏感性的试验研究
|
摘要
镇江地区的下蜀土边坡每年雨季都会发生不同程度的滑塌,然而针对下蜀土抗剪强度的水敏感性还未有系统研究。以镇江跑马山边坡中的下蜀土为试样,通过直接剪切试验研究了不同含水率下蜀土的抗剪强度特性。研究结果表明:随着含水率的增大,下蜀土的黏聚力近似呈直线型减小,而其内摩擦角则近似呈二次函数型减小。研究结果可为下蜀土边坡的稳定性分析奠定基础,具有实际工程意义。
The Xiashu soil slopes in Zhenjiang area collapse in different degrees every year during the rainy season. However,there is no systematic study on water sensitivity of the shear strength of Xiashu soil. The shear strength parameters under different water contents of Xiashu soil taken from Zhenjiang Paomashan slope are measured by direct shear test. The computing results indicate that the cohesion of Xiashu soil decreases linearly with the increase of water content. But the internal friction angle of Xiashu soil decreases approximately as a quadratic function. The research results provide theoretical reference for the stability analysis of Xiashu soil slopes.
The Xiashu soil slopes in Zhenjiang area collapse in different degrees every year during the rainy season. However,there is no systematic study on water sensitivity of the shear strength of Xiashu soil. The shear strength parameters under different water contents of Xiashu soil taken from Zhenjiang Paomashan slope are measured by direct shear test. The computing results indicate that the cohesion of Xiashu soil decreases linearly with the increase of water content. But the internal friction angle of Xiashu soil decreases approximately as a quadratic function. The research results provide theoretical reference for the stability analysis of Xiashu soil slopes.
引文
[1]郑乐平,胡雪峰,方小敏.长江中下游地区下蜀黄土成因研究的回顾[J].矿物岩石地球化学通报,2002,21(1):54-57.
[2]高国瑞,韩爱民.论中国区域性土的分布和岩土性质的形成[J].岩土工程学报,2005,27(5):511-515.
[3]韩爱民,李彤,章磊,等.南京下蜀土水敏感性特征的试验研究[J].南京工业大学学报(自然科学版),2015,37(6):81-86.
[4]施威,魏继红,宋京雷,等.含水率对下蜀土抗剪强度的影响[J].西华大学学报(自然科学报),2016,35(3):97-101.
[5] GB 50021—2009,岩土工程勘察规范[S].
[2]高国瑞,韩爱民.论中国区域性土的分布和岩土性质的形成[J].岩土工程学报,2005,27(5):511-515.
[3]韩爱民,李彤,章磊,等.南京下蜀土水敏感性特征的试验研究[J].南京工业大学学报(自然科学版),2015,37(6):81-86.
[4]施威,魏继红,宋京雷,等.含水率对下蜀土抗剪强度的影响[J].西华大学学报(自然科学报),2016,35(3):97-101.
[5] GB 50021—2009,岩土工程勘察规范[S].