公路危岩边坡稳定性数值模拟分析及治理方法研究
发布时间：2018-11-09 14:36
【摘要】：本文以三湾公路边坡危岩为典型代表进行分析,采用现场调查、数值模拟方法、刚体极限平衡分析法、运动学等研究手段,对危岩失稳崩塌的危岩体特点、失稳模式、危岩稳定性、崩塌落石运动路径等问题进行深入研究,得以下结论：1、重庆地区地质岩性组合以软硬岩互层为主要特征,在长期风化营力和重力作用下,容易发生差异风化,产生拉裂变形,形成危岩体。2、通过对落石路径的验算与模拟,得出了落石过程的运动路径、最大落石距离、碰撞动能、弹跳高度等,但是,模拟过程计算量明显减小,省时省力,而计算需要过程验算与判断,费时费力；另外,路径模拟还可以方便的进行拦挡设置,进行落石路径模拟,可以方便的看出防治措施的效果,并为危岩防治提供依据。Rocfall软件可以较好较快地为危岩防治提供依据,适时,可以运用计算方式进行辅助验算,以提高其准确性。3、在理论分析计算基础上,结合危岩特点,提出了危岩治理措施,包括采用锚固、清除、支撑、封闭岩腔等综合治理方法,对危岩顶部的裂隙进行封闭处理,并在卸荷带以外修截排水沟,坡脚修筑拦石网或拦石墙等。
[Abstract]:This paper takes the dangerous rock of Sanwan highway slope as a typical representative to analyze the characteristics of dangerous rock mass and the instability mode of unstable rock collapse by means of field investigation, numerical simulation, rigid body limit equilibrium analysis, kinematics, etc. The stability of dangerous rock and the path of collapse and falling stone movement are studied in depth. The conclusions are as follows: 1. The geological and lithologic assemblages in Chongqing area are characterized by interbedded soft and hard rocks. Under the action of long-term weathering force and gravity, differential weathering is easy to occur. By checking and simulating the rock falling path, the movement path, the maximum stone falling distance, the collision kinetic energy, the spring height and so on are obtained. However, the calculation amount of the simulation process is obviously reduced. Time and labor saving, and calculation needs process checking and judgment, time-consuming and laborious; In addition, the path simulation can also be convenient for blocking setting and rock falling path simulation, which can easily see the effect of prevention and control measures, and provide the basis for the prevention and control of dangerous rock. Rocfall software can provide the basis for the prevention and control of dangerous rock better and faster. On the basis of theoretical analysis and calculation, combined with the characteristics of dangerous rock, the measures for controlling dangerous rock are put forward, including anchoring, clearing and supporting. This paper deals with the cracks at the top of dangerous rock by comprehensive treatment methods such as sealing rock cavities and repairing drainage ditches outside the unloading zone and the stone-blocking net or wall at the foot of the slope and so on.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U418.55
本文编号：2320700
[Abstract]:This paper takes the dangerous rock of Sanwan highway slope as a typical representative to analyze the characteristics of dangerous rock mass and the instability mode of unstable rock collapse by means of field investigation, numerical simulation, rigid body limit equilibrium analysis, kinematics, etc. The stability of dangerous rock and the path of collapse and falling stone movement are studied in depth. The conclusions are as follows: 1. The geological and lithologic assemblages in Chongqing area are characterized by interbedded soft and hard rocks. Under the action of long-term weathering force and gravity, differential weathering is easy to occur. By checking and simulating the rock falling path, the movement path, the maximum stone falling distance, the collision kinetic energy, the spring height and so on are obtained. However, the calculation amount of the simulation process is obviously reduced. Time and labor saving, and calculation needs process checking and judgment, time-consuming and laborious; In addition, the path simulation can also be convenient for blocking setting and rock falling path simulation, which can easily see the effect of prevention and control measures, and provide the basis for the prevention and control of dangerous rock. Rocfall software can provide the basis for the prevention and control of dangerous rock better and faster. On the basis of theoretical analysis and calculation, combined with the characteristics of dangerous rock, the measures for controlling dangerous rock are put forward, including anchoring, clearing and supporting. This paper deals with the cracks at the top of dangerous rock by comprehensive treatment methods such as sealing rock cavities and repairing drainage ditches outside the unloading zone and the stone-blocking net or wall at the foot of the slope and so on.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U418.55
【参考文献】
相关硕士学位论文 前1条
1 姜永玲;重庆某高速铁路沿线危岩体发育特征及防治措施研究[D];成都理工大学;2011年
，本文编号：2320700
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