抗滑短桩支护土坡的试验研究  

Experimental Study on Soil Slope Supported by Short Anti-sliding Piles

作　　者：曾红艳 刘伟[1,2] 周成 韩利彪[1,2] 谭昌明 ZENG Hongyan;LIU Wei;ZHOU Cheng;HAN Libiao;TAN Changming(State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University,Chengdu 610065,Sichuan,China;College of Water Resource&Hydropower,Sichuan University,Chengdu 610065,Sichuan,China;Sichuan Provincial Highway Planning,Survey,Design and Research Institute,Co.,Ltd.,Chengdu 610041,Sichuan,China)

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065 [2]四川大学水利水电学院,四川成都610065 [3]四川省公路规划勘察设计研究院有限公司,四川成都610041

出　　处：《重庆交通大学学报（自然科学版）》2020年第9期119-126,共8页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：国家自然科学基金项目(51579167);四川省重点研发项目(2020YFS0295)。

摘　　要：为探究不同长度的抗滑短桩对坡土的支护效果,采用单排抗滑短桩加固无黏性土边坡,抗滑短桩桩长L=0(无抗滑短桩)、18、28、43 cm,开展了天然工况下牵引式滑坡模型试验;分析了模型侧壁观测土条和坡土内小块体的位移变化特征与坡土滑移面的分布规律,研究了不同长度的抗滑短桩对土坡的支护作用机理。结果表明:抗滑短桩能有效加固深层土体;随着抗滑短桩长度的增加,加固的土体范围逐渐增加,滑移面向上抬升;当抗滑短桩长度达到一定值后,滑移面的上移速率开始降低。建议:在实际工程中,应联合使用抗滑短桩与坡脚挡墙以同时加固深层土体及浅层坡土,确保整个边坡达到稳定安全状态。In order to explore the supporting effect of short anti-sliding piles with different lengths on slope soil,the model test of tractive landslide under natural condition was carried out.The non-cohesive soil slope was reinforced by single row anti-sliding short piles.The length of short anti-sliding piles L equals 0(no short anti-sliding piles),18,28 and 43 cm respectively.Based on the analysis of the displacement characteristics of the model sidewall observation soil strips and small blocks in the slope soil and the distribution law of the slope soil slip surface,the support mechanism of the short anti-sliding piles with different pile length on the soil slope was studied.The results show that the short anti-sliding piles can effectively reinforce deep soil.With the increase of the length of short anti-sliding piles,the thickness of the reinforced soil gradually increases,and the slip surface gradually rises.When the length of the short anti-sliding pile reaches a certain value,the rising rate of the slip surface begins to decrease.In practical engineering,it is suggested that anti-sliding short piles and toe retaining wall should be used together to reinforce deep soil and shallow slope soil,so as to ensure the stability and safety of the whole slope.

关 键 词：水利工程 公路工程 滑坡 浅层破坏 牵引式破坏 模型试验 抗滑短桩 

分 类 号：TU473[建筑科学—结构工程] U417.1[建筑科学—土工工程]