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高陡路堤的安全系数一般达不到路基设计规范的要求,在实际工程中常常采用土工格栅(室)加筋进行处治。由于常规计算方法(简化Bishop法、不平衡推力法等)的局限性,很难准确找出路堤潜在滑动面,据此拟定的处治方案往往针对性差。有限元分析方法通过对土基进行结构离散,根据不同材料的强度参数、本构条件及接触条件,能够直观地模拟路堤内的实际应力应变情况,准确找出路堤潜在滑动面,从而便利于设计人员根据滑动面位置、应变等值线分布情况拟定处治方案,通过必要的试算对处治方案进行完善调整后,能够使处治方案达到最优。
The safety factor of high-steep embankment generally can not meet the requirements of subgrade design specifications. In practical engineering, geogrids (room) stiffeners are often used for treatment. Due to the limitations of conventional calculation methods (simplified Bishop method, unbalanced thrust method, etc.), it is very difficult to find out the potential sliding surface of embankment accurately. Therefore, the proposed treatment plan is often poorly targeted. Finite element analysis method can effectively simulate the actual stress and strain in the embankment according to the strength parameters, constitutive conditions and contact conditions of different materials through the structural dispersion of the soil foundation, and find out the potential sliding surface of the embankment accurately to facilitate the design Based on the distribution of sliding surface position and strain contour, the staff formulates the treatment plan and makes necessary adjustments to the treatment plan to make the treatment plan reach the optimum.