摘要
为了进一步提高在役公路边坡滑坡处治效果评价可靠性,为公路安全运营和后续处治决策提供保障,以云南省待补至功山高速公路一处边坡滑坡处治工程为研究对象,采用远程实时监测方法对边坡处治过程进行监控分析。该方法以传统裂缝监测为基础,在滑坡范围外和滑坡范围内重要部位安装表面倾斜变形监测装置,补捉了滑坡处治过程中滑坡地表倾斜变形特征。监测结果显示:该边坡2021年5月至8月下旬集中降雨期间存在向边坡右前侧小角度倾斜变形,但是总体变形较小,随着边坡防护措施施工完毕后,边坡内部应力调整逐渐结束,整体变形逐渐趋于收敛。研究结果表明:(1)滑坡不同区域表面倾斜变形特征可反映中小型滑坡发展的各个阶段,对指示滑坡变形演化具有重要意义;(2)倾角变化时间曲线和倾角变化矢量方位角可作为分析滑坡表面倾角变形的有效工具,通过倾角变化时间曲线可以分析监测点X/Y轴倾角随时间的变化趋势与速率;倾角变化矢量方位角通过将X/Y轴倾角进行融合计算,可得到监测点倾斜的方位角和历史变化过程,且能够直观分析倾角变化量的大小。(3)通过长期监测开展工程处治效果评价具有更高可靠性,可为针对性的整改措施提供技术支撑。
In order to further improve the reliability of the evaluation of the treatment effect of the slope landslide of the highway in service,and provide guarantee for the safe operation of the highway and the subsequent treatment decisions,This paper takes a slope landslide treatment project of the Daibu Gongshan Expressway in Yunnan Province as the research object,and adopts remote real-time monitoring method to monitor and analyze the slope treatment process.This method is based on traditional crack monitoring,and surface tilt deformation monitoring devices are installed at important parts outside and within the scope of the landslide to supplement the slope deformation characteristics of the landslide surface in the process of landslide treatment.The monitoring results show that the slope inclines slightly to the front right side of the slope during the concentrated rainfall period from May 2021 to late August 2021,but the overall deformation is small.With the completion of slope protection measures,the internal stress adjustment of the slope gradually ends,and the overall deformation gradually tends to converge.The results show that:①The surface inclination deformation characteristics in different regions of landslides can reflect the development stages of small and medium-sized landslides,which is of great significance to indicate the deformation evolution of landslides;②The dip change time curve and the dip change vector azimuth can be used as an effective tool to analyze the slope deformation of the landslide surface.Through the dip change time curve,the change trend and rate of the X/Y axis dip angle of the monitoring point with time can be analyzed;The azimuth angle of the tilt change vector can be obtained through the fusion calculation of the X/Y axis tilt angle,and the historical change process of the monitoring point tilt can be obtained,and the magnitude of the tilt change can be intuitively analyzed.③The evaluation of engineering treatment effect through long-term monitoring has higher reliability
作者
叶咸
高瑜
李果
赵鑫
YE Xian;GAO Yu;LI Guo;ZHAO Xin(Broadvision Engineering Consultants,Kunming,Yunnan 650041,China;Yunnan Key Laboratory of Digital Communications,Kunming,Yunnan 650000,China;Yunnan Geological Environment Monitoring Institute,Kunming,Yunnan 650216,China)
出处
《公路工程》
2023年第6期114-123,共10页
Highway Engineering
基金
云南省交通运输厅2019年科技创新管理咨询研究项目(2019301)
交通运输部2021年度交通运输行业重点科技项目清单项目(2021-MS4-105)
云南省数字交通重点实验室项目(202205AG070008)
云南省交通规划设计研究院有限公司科技项目(ZL-2021-03)
交通运输部在役干线公路基础设施与安全应急数字化试点项目(306)
云南省科学技术厅技术创新人才培养项目(202305AD160048)。
关键词
滑坡
处治效果
倾斜变形
自动化监测
矢量方位角
landslide
treatment effect
tilt deformation
automatic monitoring
vector azimuth
