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中国西北地区分布大面积的黄土,黄土滑坡是黄土地区工程建设最大的威胁。在吕梁新建铁路过程中,出现多处诱发因素类似的黄土-泥岩接触面滑坡,常规的极限平衡方法或有限元法在计算该类不同介质接触型边坡问题时很难准确的评价边坡稳定性,因而提出借助于模糊数学综合评判的方法。建立适合吕梁地区黄土-泥岩接触面滑坡评价的数学模型,综合各种影响因素,根据各因素的权重进行计算评价。通过实际铁路建设中开挖路堑导致工程滑坡的实例,综合各种影响因素较准确的评价了该边坡的稳定性,与工程实际相符,证明本模型在该地区具有简单可行,客观实际的优点,具有一定的实用性。
Large area of loess and loess landslide distributed in Northwest China is the biggest threat to the engineering construction in loess area. During the construction of Luliang railway, there are many loess-mudstone contact landslides with similar inducing factors. The conventional limit equilibrium method or finite element method is very difficult to evaluate slope stability accurately when calculating the contact slope of different kinds of medium Therefore, a method based on the fuzzy mathematics comprehensive evaluation is put forward. A mathematic model suitable for landslide evaluation of loess-mudstone contact surface in Luliang area is established. Based on the various influencing factors, the landslide is calculated and evaluated according to the weight of each factor. Through the example of engineering landslide caused by the excavation of road cutting in actual railway construction, the stability of the slope is evaluated with various factors in a more accurate way, which is consistent with the engineering practice. It is proved that the model has the advantages of simple and feasible, objective and practical in this area , Has a certain practicality.