摘要
【目的】位于中国山西的禹门口隧道在建设过程中发现隧道口上方的陡崖存在较多岩石崩塌掉落现象,严重威胁浩吉铁路的正常运行。为保护工程区域,需进行岩崩灾害综合分析。【方法】利用RocPro3D理论及方法结合现场调查,运用无人机高精度航拍影像数据,对发现的64个危岩体失稳问题进行数值模拟研究,分析危岩体的三维运动路径、速度、弹跳高度、频率和停驻点等参数。构建了上述4个参数作为评价因子的崩塌危险性评价模型。【结果】研究区域的桥梁锚锭和桥隧工程区的危险性都处于中等及以上水平,而龙虎公路受影响段的危险性则在低至高之间。【结论】模拟结果与实际调查相结合,可为选择崩塌落石防治措施提供合理依据。
[Purposes]During the construction process of the Yumenkou Tunnel located in Shanxi,China,it was discovered that there were many rock collapses and falls on the steep cliffs above the tunnel en-trance,seriously threatening the normal operation of the Haoji Railway.In order to protect the engineer-ing area,a comprehensive analysis of rock collapse disasters was conducted.[Methods]Combing with on-site investigations and high-precision aerial imaging data from drones,this study utilized RocPro3D theory and methods to conduct numerical simulation studies on 64 unstable rock masses discovered.The three-dimensional motion path,velocity,bounce height,frequency,and stopping point parameters of the hazardous rock masses were analyzed.A collapse risk assessment model was constructed using the above four parameters as evaluation factors.[Findings]The danger level of bridge anchors and bridge tunnel engineering areas in the study area is at a moderate or above level,while the danger level of the affected section of the Longhu Highway is between low and high.[Conclusions]The combination of simulation re-sults and actual investigation provides a reasonable basis for selecting prevention and control measures for collapse and rockfall.
作者
张振江
周峰明
罗干
ZHANG Zhenjiang;ZHOU Fengming;LUO Gan(Inner Mongolia Hohhot Pumped Storage Power Generation Co.,Ltd,Hohhot 010000,China;Nanyang Yuzi Investment Development Co.,Ltd,Nanyang 473000,China;North China University of Water Resources and Electric Power,Zhengzhou 450045,China)
出处
《河南科技》
2024年第17期101-105,共5页
Henan Science and Technology
基金
水能资源利用关键技术湖南省重点实验室开放研究基金资助项目(PKLHD202203)。
