透水混凝土导渗-锚固护坡性能试验与分析研究

Analysis and Performance Test of Drainage-anchorage Slope Protection Structure with Pervious Concrete

为预防降雨引起的滑坡,研究具有导渗、锚固功能的护坡结构。采用多孔透水混凝土作为锚固胶结材料,试验测试导渗-锚固的渗透系数、握裹力、土层接触面的黏抗剪切强度等参数,数值分析该护坡结构作用边坡的渗流场、局部土体抗剪强度与边坡稳定性。研究表明,该结构可以有效发挥导渗、锚固的作用,孔隙率18%时,综合效果较好。在降雨时,浸润线的上升与岩土劣化均较为缓慢,有利于边坡稳定;降水中止后,又能快速恢复原态。因此,该导渗锚固护坡结构具有优良的防灾性能。

In order to prevent the landslide caused by rainfall,this paper studies the slope protection structure with drainage and anchoring function,tests the permeability coefficient,holding force and shear strength of soil interface of drainage and anchorage structure by using porous pervious concrete as anchoring and cementing material,and analyzes numerically the seepage field,shear strength of local soil and slope stability with the slope protection structure.The results show that:the structure can effectively play the role of drainage and anchorage,and the comprehensive effect is better when the porosity is 18%.During rainfall,the rise of phreatic line and the deterioration of rock and soil are relatively slow,which is conducive to the slope stability.After the rainfall stops,the slope can quickly restore to original state.Therefore,the drainage-anchorage slope protection structure has excellent disaster prevention performance.