云南大关县塘房村高边坡稳定性评价

发布时间：2018-05-23 10:32

本文选题：高边坡 + 崩塌　；参考：《中国地质大学(北京)》2015年硕士论文

【摘要】：随着西部大开发战略实施,越来越多的公路铁路在西部山区开工修建。由于西部地区山高坡陡的地形特点,越来越多的工程问题有待解决。本文以重庆到昆明公路修建中塘房村高边坡为例,对其破坏机制和稳定性进行了系统的评价,力图给出有价值的数据供相关工程和研究作为参考。本文首先通过对勘查资料的整理和现场勘查对塘房村高边坡及周围的地形地貌、水文气象、地层岩性、地质构造及区域地质稳定性进行了研究,根据其结构特征判断其可能的破坏模式为滑移式破坏。对危岩体区域分别采用定性分析法中的极射赤平投影图解法和定量分析法中的SARMA法和数值模拟法进行稳定性分析。通过赤平投影图解分析该处边坡在2组节理面和岩层层面的作用下被切割成一定大小倾向临空方向的楔形体。这种楔形体不利于稳定,在暴雨和地震条件下很可能发生失稳破坏。通过定量分析法中的SARMA法和数值模拟软件UDEC的计算,得出在天然工况下,边坡发生整体失稳的可能性不大。在暴雨工况下,由于边坡受雨水的浸泡和冲刷,岩块和结构面的强度都有所下降,整体稳定性处于临界滑动状态,可能发生变形破坏。在地震工况下,本文采用底部输入正弦波,在周期震动的作用下边坡处于失稳状态。最后,本文在可能发生崩塌落块的位置选用rocfall软件对岩石崩落的轨迹给予预测。以图表形式给出落石的落距、速度、能量、弹跳高度的概率分布,建议采取柔性网防护并结合监测预警装置进行治理。
[Abstract]:With the implementation of the western development strategy, more and more roads and railways are being built in the western mountainous areas. More and more engineering problems need to be solved due to the topographic characteristics of high mountain and steep slope in the western region. Taking the construction of Zhongtang Fangcun High Slope of Chongqing to Kunming Highway as an example, this paper systematically evaluates its failure mechanism and stability, and tries to provide valuable data for reference of relevant engineering and research. In this paper, the topographic, geomorphology, hydrometeorology, stratigraphic lithology, geological structure and regional geological stability of Tangfang village high slope are studied through the collation of exploration data and field survey. According to its structural characteristics, the possible failure mode is sliding failure. The stability analysis of dangerous rock mass region is carried out by using the method of polar projection diagram in qualitative analysis method and the SARMA method and numerical simulation method in quantitative analysis method. The slope is cut into wedges with a certain size in the direction of the face of the air under the action of two groups of joint planes and strata by using the projection diagram of the plane. This kind of wedge is not good for stability, and it is likely to be unstable under heavy rain and earthquake. Through the calculation of the SARMA method and the numerical simulation software UDEC in the quantitative analysis method, it is concluded that the slope instability is not likely to occur under natural conditions. Under the heavy rain condition, the strength of the rock block and the structural plane are decreased because the slope is soaked and washed by Rain Water, and the whole stability is in the critical sliding state, which may result in deformation and failure. In this paper, the sinusoidal wave is input from the bottom of the slope under the earthquake condition, and the slope is in the state of instability under the action of periodic vibration. Finally, rocfall software is used to predict the trajectory of rock caving. The probability distribution of falling distance, velocity, energy and jumping height of falling stone is given in the form of chart. It is suggested that flexible net protection should be adopted in combination with monitoring and warning device.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.14;P642.2

【参考文献】