岩质边坡锚杆受力计算模型分析
发布时间：2018-10-05 18:17
【摘要】：工程实践中需要面对的岩质边坡数量庞大，边坡一旦失稳，将引起严重后果。边坡规范提出的岩质边坡锚杆受力计算模型为均匀分布或者接近于均匀分布，，这与实际检测和模拟结果有很大的出入。有必要根据边坡和锚杆协调变形机理提出新的锚杆受力计算模型。 在岩质边坡岩体岩性相同，不存在外倾结构面时，将坡体看成各向同性弹性体，运用弹性力学，求解边坡在锚杆轴力、堆载和重力作用下位移解析解。在位移解析解的基础上，本文深入剖析边坡和锚杆变形协调机理，考虑边坡支挡的经济性，提出了新的岩质边坡锚杆轴力计算模型：锚杆的轴力和边坡的变形相关，呈现上大下小，沿着边坡高度接近二次曲线分布。并通过UDEC程序进行了数值模拟分析，验证了计算模型正确性。本文最后结合具体的工程实例，采用了规范方法和本文研究的岩质边坡锚杆轴力受力计算模型方法分别设计并进行对比，说明其异同。
[Abstract]:The large quantity of rock slope in engineering practice will cause serious consequences once the slope is unstable. The stress calculation model of rock slope bolt proposed by the slope code is uniform distribution or close to uniform distribution, which is very different from the actual test and simulation results. It is necessary to put forward a new stress calculation model based on the deformation mechanism of slope and bolt. When the rock mass lithology of rock slope is the same and there is no extroverted structural plane, the slope body is regarded as an isotropic elastic body, and the analytical solution of slope displacement under the action of anchor rod axial force, heaped load and gravity is solved by means of elastic mechanics. On the basis of the analytical solution of displacement, this paper deeply analyzes the coordination mechanism of deformation of slope and anchor rod, considering the economy of slope retaining, puts forward a new calculation model of axial force of anchor rod in rock slope: the axial force of anchor rod is related to the deformation of slope. The distribution is similar to the quadratic curve along the slope height. The correctness of the calculation model is verified by numerical simulation and analysis by UDEC program. In the end of this paper, combined with concrete engineering examples, the author designs and compares the calculation model of axial force of rock slope anchor with the method of code and the method of calculation of axial force of rock slope studied in this paper, and explains its similarities and differences.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU45
本文编号：2254386
[Abstract]:The large quantity of rock slope in engineering practice will cause serious consequences once the slope is unstable. The stress calculation model of rock slope bolt proposed by the slope code is uniform distribution or close to uniform distribution, which is very different from the actual test and simulation results. It is necessary to put forward a new stress calculation model based on the deformation mechanism of slope and bolt. When the rock mass lithology of rock slope is the same and there is no extroverted structural plane, the slope body is regarded as an isotropic elastic body, and the analytical solution of slope displacement under the action of anchor rod axial force, heaped load and gravity is solved by means of elastic mechanics. On the basis of the analytical solution of displacement, this paper deeply analyzes the coordination mechanism of deformation of slope and anchor rod, considering the economy of slope retaining, puts forward a new calculation model of axial force of anchor rod in rock slope: the axial force of anchor rod is related to the deformation of slope. The distribution is similar to the quadratic curve along the slope height. The correctness of the calculation model is verified by numerical simulation and analysis by UDEC program. In the end of this paper, combined with concrete engineering examples, the author designs and compares the calculation model of axial force of rock slope anchor with the method of code and the method of calculation of axial force of rock slope studied in this paper, and explains its similarities and differences.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU45
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