摘要
为了在引黄济宁工程古近系红层区建立典型斜坡深层变形破坏模式并用于寻找和识别深层破坏型斜坡变形体,依据工程供水区斜坡变形破坏现象调查分析成果,逐个分析古近系红层区发现的深层破坏红层滑坡体的形成机制,并反向分析红层滑坡体形成前天然斜坡地质力学特征,对古近系红层区天然斜坡深层变形破坏产生的关键因素进行数值模拟分析,分别建立古近系红层区典型斜坡深层变形破坏模式,并在古近系红层区寻找符合典型斜坡深层变形破坏模式对应地质结构模式的斜坡变形体并建立三维数值模拟模型,分析古近系红层区变形体斜坡天然、地震与降雨等条件下的变形稳定特征,识别出深层破坏型变形体。结果表明:古近系红层区斜坡深层变形破坏模式与地层岩段有关,根据典型斜坡深层变形破坏模式识别出古近系红层区供水工程24号支线沿线有一个可能发生深层变形破坏的变形体,暴雨条件下该变形体斜坡稳定性较差。
In order to establish typical deep deformation and failure modes for slopes in the Paleogene red-bed area of the Yellow River to Xining Diversion Project,and to identify deep failure-type slope deformation masses,based on investigation and analysis results of slope deformation and failure phenomena in the water supply area,the formation mechanism of each discovered deep-failure red-bed landslide mass was analyzed,and a reverse analysis was conducted to determine the geomechanical characteristics of natural slopes before the formation of red-bed landslides.Numerical simulations were performed to analyze the key factors causing deep deformation failure of natural slopes in the Paleogene red-bed area,and typical deep deformation and failure modes for slopes in the Paleogene red-bed area were established.Slope deformation masses with the geological structural characteristics of typical deep deformation and failure modes were identified in the Paleogene red-bed area,and a three-dimensional numerical simulation model was established to analyze the deformation and stability characteristics of these deforming slope under natural,seismic,and rainfall conditions,and identify deep failure-type slope deformation masses.The results show that the deep deformation and failure mode for slopes in the Paleogene red-bed area is related to the stratum rock segments.According to the established typical deep deformation and failure mode for slopes,a potential deformation mass is identified along the No.24 branch line of the water supply project in the Paleogene red-bed area,showing poor stability under rainstorm conditions.
作者
袁宝远
李孟德
YUAN Baoyuan;LI Mengde(School of Earth Sciences and Engineering,Hohai University,Nanjing 211100,China)
出处
《水利水电科技进展》
北大核心
2025年第6期91-97,共7页
Advances in Science and Technology of Water Resources
基金
国家自然科学基金项目(41977253)。
关键词
引水工程
古近系红层
斜坡
深层变形破坏模式
引黄济宁工程
diversion project
Paleogene red bed
slope
deep deformation and failure modes
the Yellow River to Xining Diversion Project
