多工况下人工黄土高边坡的稳定性分析与评价——以兰州市伏龙坪地区为例  

Stability analysis and evaluation of a high loess slope under different condi‐tions:A case study of Fulongping in Lanzhou City

作　　者：李冰川 王振华 杜灵 王陶然 王燕忠 LI Bingchuan;WANG Zhenhua;DU Ling;WANG Taoran;WANG Yanzhong(The Eight Geological Brigade of Hebei bureau of geology and mineral resources exploration,Qinhuangdao 066000,Hebei,China;Gansu Institute of Natural Resources Planning And Research,Lanzhou 730000,Gansu,China)

机构地区：[1]河北省地质矿产勘查开发局第八地质大队,河北秦皇岛066000 [2]甘肃省自然资源规划研究院,甘肃兰州730000

出　　处：《矿产勘查》2024年第10期1921-1928,共8页Mineral Exploration

基　　金：甘肃省省级财政专项(甘资财发[2020]16号);东华理工大学放射性地质与勘探技术国防重点学科实验室开放基金(2020RGET10)联合资助。

摘　　要：西北地区黄土成分和结构复杂,传统的极限平衡法和工程类比法在高边坡黄土稳定性评价中存在不足。本文以兰州市伏龙坪西侧人工黄土高边坡为研究对象,在野外调查和室内土工实验的基础上,建立了斜坡计算模型,确定了模型计算参数,利用Geostudio数值模拟软件,计算了天然、暴雨和地震工况下黄土高边坡的稳定性系数,并在此基础上评价了边坡的稳定性,确定了研究区斜坡失稳的空间特征。该研究采用数值模拟方法对兰州地区人工高边坡进行了定量计算和评价,对类似工程具有重要的参考意义。The loess composition and structure in the northwest region is complex,and traditional limit equilibrium method and engineering analogy method have limitations in the stability evaluation of high slopes in loess areas.This paper takes the artificial loess high slope on the west side of Fu Longping in Lanzhou as the research object,and establishes a slope calculation model based on field investigation and in-situ soil mechanics experiments.The calculation parameters of the model are determined,and the stability coefficient of the loess high slope under natural,rainstorm,and earthquake conditions is calculated using Geostudio numerical simulation software.On this basis,the stability of the slope is evaluated,and the spatial characteristics of slope failure in the study area are determined.This study uses numerical simulation methods to quantitatively calculate and evaluate similar engineering projects in Lanzhou,which has important reference significance.

关 键 词：马兰黄土 黄土高边坡 稳定性 GeoStudio 

分 类 号：P642.22[天文地球—工程地质学]