四川省青川县东河口滑坡岩石的抗剪断性质试验
|
摘要
东河口滑坡是5·12汶川大地震触发的典型的高速远程滑坡,致使780余人遇难。该滑坡体主要由震旦系灰岩和寒武系炭质板岩、千枚岩构成。震后在对该滑坡进行详细野外调研的基础上,采集了具有代表性的岩块作为试验样品,利用60t液压式万能材料试验机对该滑坡岩石的抗剪断性质进行了一系列试验。试验结果表明,水对该滑坡岩体的力学性质有重要的影响,干燥状态与饱水状态下岩石的抗剪断强度有很大的差异,岩石中存在的结构面也是影响岩石力学性质的主要因素之一,是岩质边坡稳定性的一个主要控制条件。
Donghekou landslide,a typical landslide located in Qingchuan County triggered by the 2008 Wenchuan earthquake,with high speed and long run-out,caused more than 780 deaths. This landslide is mainly composed of Sinian limestone and Cambrian carbon slate and phyllite. After the earthquake,we investigated this landslide and collected representative rock samples. By using the 60t Hydraulic Universal Testing Machine,a series of tests had been carried out to study the mechanical properties of rocks from Donghekou landslide and significant conclusions were obtained. It's indicated by the test results that water is an important factor for the mechanical properties of rocks,and the shear strength is quite different when in the dried status than in saturated status. Moreover,the structural surface is also critical,which can be a controlling condition for rock landslide stability.
Donghekou landslide,a typical landslide located in Qingchuan County triggered by the 2008 Wenchuan earthquake,with high speed and long run-out,caused more than 780 deaths. This landslide is mainly composed of Sinian limestone and Cambrian carbon slate and phyllite. After the earthquake,we investigated this landslide and collected representative rock samples. By using the 60t Hydraulic Universal Testing Machine,a series of tests had been carried out to study the mechanical properties of rocks from Donghekou landslide and significant conclusions were obtained. It's indicated by the test results that water is an important factor for the mechanical properties of rocks,and the shear strength is quite different when in the dried status than in saturated status. Moreover,the structural surface is also critical,which can be a controlling condition for rock landslide stability.
引文
[1]Hudson J A,Harrison J.Engineering rock mechanics:an introduction to the principles[M].Oxford:Elsevier Science Ltd.,1997.
[2]程谦恭,胡厚田,胡广韬,等.高速岩质滑坡临床弹冲与峰残强降复合启程加速动力学机制[J].岩石力学与工程学报,2000,19(2):173-176.
[3]林鹏,王仁坤,黄凯珠.含裂纹缺陷脆性岩石的峰值强度模型[J].清华大学学报(自然科学版),2006,46(9):1514-15l7.
[4]尤明庆,苏承东,缑勇.大理岩孔道试样的强度及变形特性的试验研究[J].岩石力学与工程学报,2007,26(12):2420-2429.
[5]徐斌,孔宪京,邹德高,等.饱和砂砾料液化后应力与变形特性试验研究[J].岩土工程学报,2007,29(1):103-106.
[6]刘晓丽,王思敬,王恩志,等.单轴压缩岩石中缺陷的演化规律及岩石强度[J].岩石力学与工程学报,2008,27(6):1195-1201.
[7]黄润秋,黄达.卸荷条件下花岗岩力学特性试验研究[J].岩石力学与工程学报,2008,27(11):2205-2213.
[8]于德海,彭建兵.三轴压缩下水影响绿泥石片岩力学性质试验研究[J].岩石力学与工程学报,2009,28(1):205-211.
[2]程谦恭,胡厚田,胡广韬,等.高速岩质滑坡临床弹冲与峰残强降复合启程加速动力学机制[J].岩石力学与工程学报,2000,19(2):173-176.
[3]林鹏,王仁坤,黄凯珠.含裂纹缺陷脆性岩石的峰值强度模型[J].清华大学学报(自然科学版),2006,46(9):1514-15l7.
[4]尤明庆,苏承东,缑勇.大理岩孔道试样的强度及变形特性的试验研究[J].岩石力学与工程学报,2007,26(12):2420-2429.
[5]徐斌,孔宪京,邹德高,等.饱和砂砾料液化后应力与变形特性试验研究[J].岩土工程学报,2007,29(1):103-106.
[6]刘晓丽,王思敬,王恩志,等.单轴压缩岩石中缺陷的演化规律及岩石强度[J].岩石力学与工程学报,2008,27(6):1195-1201.
[7]黄润秋,黄达.卸荷条件下花岗岩力学特性试验研究[J].岩石力学与工程学报,2008,27(11):2205-2213.
[8]于德海,彭建兵.三轴压缩下水影响绿泥石片岩力学性质试验研究[J].岩石力学与工程学报,2009,28(1):205-211.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心