峰值强度与残余强度对边坡加固的影响研究

Influence of parameters of peak strength and residual strength on the reinforcement of slopes

现有的边坡加固方案中,基本上都是用岩土的峰值强度来确定边坡的临界滑面和锚固长度。实际上,边坡出现滑动后,滑面保持残余变形和抵抗外部载荷的能力出现了衰减,滑面上的强度只是残余强度,采用一种混合方法进行边坡加固,即用峰值强度来确定边坡的临界滑面,用残余强度来确定锚固长度。研究表明,采用混合方法对边坡进行加固可以提高边坡加固工程的安全性,具有较大的实际意义。

The parameters of peak strength are often used to determine the critical slip surface and the length of anchors in schemes of slopes’ reinforcement at present,in fact,the capability of resisting loads and deformation decreases in the slip surface after sliding,there are only residual strength existing. Therefore,a mixed method is proposed to reinforce slopes,that is,the critical slip surface is determined by the parameters of peak strength,while the length of anchors is determined by the parameters of residual strength. The research shows that the safety of the reinforced slopes could be improved by the mixed method.