Research On Deformation Prediction And Prevention Countermeasure Of Expansive Soil Landslide

Expansive soil has particular features,which are bad for the engineering project.It often leads to kinds of geologic hazard especially landslide.With the great development of freeway in our country,more and more freeways have to transit expansive soil zone,so expansive soil landslide is the main hazard in freeway construction in expansive soil zone.Engineering geologic condition is more complex in expansive soil landslide.Greater deformation of landslide and new landslide could be caused by unreasonable construction and unexpected nature factors during prevention,which may lead to more loss of engineering project. Therefore,it is very important to predict exactly the deformation of expansive soil landslide in time with surveillance data and it is the key point of reducing the loss of engineering project and ensuring the engineering quality.Taking shallow landslide of expansive soil in Xiang Jia po for example,main engineering features and formation influential factor of expansive soil landslide is researched. Based on the above,the reason why shallow landslide of expansive soil in Xiang Jia po reactive,is also researched in the three aspects of matter composition and soil mass texture, interaction of water and manual exaction.Deformation trend of shallow landslide of expansive soil in Xiang Jia po during prevention is synthesis predicted with the method of exponential smoothing and metabolism GM(1,1) models,and results of the two models is synthetically predicted with varied weighting method.The final synthesis treatment of shallow landslide of expansive soil in Xiang Jia po is proposed based on the analysis of prevention principle and countermeasures of expansive soil landslide.Three research findings are as below:1.The average relative errors of exponential smoothing and metabolism GM(1,1) models are respectively 9.21%and 9.24%.Both of the models can well follow and predict the deformation of expansive soil landslide during prevention.2.The varied weighting synthesis predicted model played advantage of the single predicted model.The average relative error and the minimum relative error of this model are respectively 6.12%and 0.21%(p=5).The deformation trend of expansive soil landslide during prevention can be predicted by the model which is more exactly than single predicted model and it provides credible warranties for landslide control.3.The deformation of shallow landslide of expansive soil in Xiang Jia po is well controlled by synthesis improvement countermeasure of drainage,support and biology(plant).