基于精细地形模型的边坡三维块体稳定性分析
发布时间：2019-03-18 19:02
【摘要】：结构面是岩质边坡稳定性的控制性因素,其可在坡体中组合形成潜在失稳块体,基于块体理论和运动学分析可搜索确定块体边界,但块体边界的正确性及岩块稳定性计算结果的准确性取决于地形的精确性。本文以实际工程边坡为例,基于等高线数据,采用Siemens Unigrphics NX10.0软件参数化方法建立了精细地形模型,进一步运用Auto CAD搜索了潜在失稳块体,并计算了块体稳定性系数。结果表明:岩层产状(3)、(4)可能在局部区域形成了独立块体,若组合同倾向陡倾结构面,则形成独立块体的可能性大增;若产状(3)倾角增大,则形成块体的可能性降低。各种块体的稳定性均满足设计要求,仅在施工扰动结构面粘聚力完全丧失的条件下,局部块体的安全系数略低于设计值。因此,建议在施工中保护好结构面粘聚力。
[Abstract]:Structural plane is the controlling factor of rock slope stability, and it can form potential unstable block in slope body. Based on block theory and kinematic analysis, block boundary can be determined by searching. However, the correctness of the block boundary and the accuracy of the stability of the rock block depend on the accuracy of the terrain. Taking the actual slope as an example, based on contour data, a fine terrain model is established by using Siemens Unigrphics NX10.0 software parameterization method, and the potential unstable block is further searched by Auto CAD, and the block stability coefficient is calculated. The results show that the occurrence of rock formation (3), (4) may form independent block in the local area, and the possibility of forming independent block is greatly increased if the formation contract tends to steep inclined structural plane. If the dip angle of occurrence (3) increases, the possibility of forming block decreases. The stability of all kinds of blocks satisfies the design requirements, and the safety factor of local blocks is slightly lower than the design value only when the cohesive force of the construction disturbed structural surface is completely lost. Therefore, it is suggested to protect the cohesive force of structural surface in construction.
【作者单位】： 四川电力设计咨询有限责任公司;西南交通大学土木工程学院;
【基金】：国家自然科学基金(51178402) 国家重点研发计划重点专项(2016YFC0802200)
【分类号】：TU457
[Abstract]:Structural plane is the controlling factor of rock slope stability, and it can form potential unstable block in slope body. Based on block theory and kinematic analysis, block boundary can be determined by searching. However, the correctness of the block boundary and the accuracy of the stability of the rock block depend on the accuracy of the terrain. Taking the actual slope as an example, based on contour data, a fine terrain model is established by using Siemens Unigrphics NX10.0 software parameterization method, and the potential unstable block is further searched by Auto CAD, and the block stability coefficient is calculated. The results show that the occurrence of rock formation (3), (4) may form independent block in the local area, and the possibility of forming independent block is greatly increased if the formation contract tends to steep inclined structural plane. If the dip angle of occurrence (3) increases, the possibility of forming block decreases. The stability of all kinds of blocks satisfies the design requirements, and the safety factor of local blocks is slightly lower than the design value only when the cohesive force of the construction disturbed structural surface is completely lost. Therefore, it is suggested to protect the cohesive force of structural surface in construction.
【作者单位】： 四川电力设计咨询有限责任公司;西南交通大学土木工程学院;
【基金】：国家自然科学基金(51178402) 国家重点研发计划重点专项(2016YFC0802200)
【分类号】：TU457
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