兰州新区黄土路堑高边坡勘察实录  

Investigation record of high loess slope in Lanzhou New Area

作　　者：唐俊[1] 王辉[1] TANG Jun;WANG Hui(Anhui transport consulting&Design institute Co.,Ltd.,Hefei,Anhui 230088)

机构地区：[1]安徽省交通规划设计研究总院股份有限公司,安徽合肥230088

出　　处：《黑龙江交通科技》2021年第1期16-18,共3页Communications Science and Technology Heilongjiang

摘　　要：项目位于兰州新区,场地黄土自重湿陷量大,边坡稳定性受雨水影响大。但场地为干旱区,降水稀少,气候干,很难形成连续降水且降雨量很小,且坡体周边排水条件好,边坡难以形成稳定的地下水位。所以在暴雨或连续降雨工况下,边坡的岩土参数不能整体统一进行强度折减,而是应根据坡体浸水深度,分段折减取值。坡体浸润饱和深度以及抗剪强度折减是边坡稳定性计算的关键。对挖方路堑的弃土进行路基填料试验评价,减少弃方量,减少对脆弱生态的破坏。The project is located in Lanzhou New Area In the survey area,the self weight collapsibility of the Loess are large,and the slope stability is greatly affected by rainwater.However,the site is in the arid area,with little rainfall and dry climate.It is difficult to form continuous precipitation and the amount of rainfall is little,and the drainage conditions around the slope are good,so the slope is difficult to form a stable groundwater level.Under the condition of rainstorm or continuous rainfall,the geotechnical parameters of the slope can not be unified for strength reduction as a whole,but should be taken according to the immersion depth of the slope.The saturation depth of the slope and shear strength reduction are the key factors for slope stability calculation.At the same time,the test and evaluation of subgrade filling are carried out for the waste soil of excavation cutting,so as to reduce the amount of waste soil and the damage to fragile ecology.

关 键 词：黄土 高边坡 稳定性 定量计算 边坡降雨浸润模型 地质勘察 路基填料 

分 类 号：U418.9[交通运输工程—道路与铁道工程]