斜坡膨胀土路堑病害形成原因及整治案例分析  

Analysis of the causes of disease formation of expansive soil cutting slope and case analysis of remediation

作　　者：王开云[1] Wang Kaiyun(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China)

机构地区：[1]中铁二院工程集团有限责任公司,四川成都610031

出　　处：《山西建筑》2023年第6期143-146,共4页Shanxi Architecture

摘　　要：膨胀土遇水膨胀、失水收缩、开裂的特征,易使膨胀土边坡产生工程滑坡等病害。膨胀土路堑边坡在区域持续强降雨、施工开挖形成山体临空面、挡墙个别泄水孔排水不畅等因素的共同作用下,引起坡脚挡土墙移位变形、沿沉降缝推移产生错台,形成圈椅状地貌形态的开裂变形体,基岩面上膨胀土受水浸泡成软塑状土层,形成工程滑坡病害。根据滑坡计算分析结果,采用设置抗滑桩、膨胀土挡墙、截水沟、支撑渗沟等措施进行综合整治加固。通过洛湛铁路D3K55+985~D3K56+155段病害整治分析实例,给出了一些有价值的建议。The characteristics of expansive soil swelling,water loss shrinkage and cracking when exposed to water are easy to cause engineering landslides and other diseases on the slope of expansive soil.Under the combined action of factors such as continuous heavy rainfall in the region,construction excavation forming the empty surface of the mountain,and poor drainage of individual drainage holes of the retaining wall,the expansive soil graben slope caused the displacement and deformation of the retaining wall at the foot of the slope,and the displacement and deformation along the settlement joint,forming a cracked deformation of the circle chair-like geomorphological form,and the expansive soil on the bedrock face was soaked into a soft plastic soil layer by water,forming engineering landslide diseases.According to the calculation and analysis results of landslide,comprehensive rectification and reinforcement were carried out by setting up anti-slip piles,expansive soil retaining walls,water interception ditches,and supporting seepage ditches.Through the disease remediatio n analysis examples of section D3K55+985~D3K56+155 of Luoyang-Zhanjiang railway.Some valuable advice is given.

关 键 词：膨胀土 铁路 路堑边坡 病害 整治措施 

分 类 号：TU413.62[建筑科学—岩土工程]