山区高速公路深路堑滑坡处治方案探讨

Discussion on Treatment Scheme of Deep Road Cut Landslides of Mountainous Expressways

摘要:

以云南某山区高速公路服务区B匝道“BK0+779.295”～“BK1+019.928”段右侧深路堑为例，根据路基滑坡变形破坏特征，综合考虑安全、经济、用地等因素，对滑坡处提出2种边坡设计方案，分别为“十字锚+后缘抗滑桩+坡脚抗滑桩”和“十字锚+后缘抗滑桩+坡脚抗滑挡墙”；将2种方案进行比选，提出以“十字锚+后缘抗滑桩+前缘抗滑桩”为主的深路堑防护整治方案，并对施工后的情况进行变形监测。结果显示：以“十字锚+后缘抗滑桩+前缘抗滑桩”为主的深路堑防护整治方案，可有效解决边坡滑坡变形问题，为类似的深路堑边坡失稳处置提供一定参考。

Abstract:

Taking the deep road cut on the right side of the BK0+779.295 ~ BK1+019.928 section of the Ramp B in a mountainous expressway of Yunnan Province as an example, based on the deformation and damage characteristics of roadbed landslides, and considering factors such as safety, economy and land use, two slope design schemes are proposed for the landslide site, which are "cross anchor + rear edge anti-slide pile + slope foot anti-slide pile" and "cross anchor + rear edge anti-slide pile + slope foot anti-slide retaining wall". After the two schemes are compared, it is proposed that the "cross anchor + rear edge anti-slide pile + slope foot anti-slide pile" is the main scheme for the protection and improvement of deep road cuts, and the deformation after construction is monitored. The results show that the "cross anchor + rear edge anti-slide pile + slope foot anti-slide pile" as the main scheme for the protection and improvement of deep road cuts can effectively solve the problems of slope landslide and deformation, providing a certain reference for the treatment of similar deep road cut slope instability.