路基边坡表面变形远程监测与稳定性评价方法研究

发布时间：2018-04-02 09:59

本文选题：激光测距　切入点：边坡变形监测　出处：《重庆交通大学》2014年硕士论文

【摘要】：随着我国道路交通建设的迅速发展，在公路新建过程中，出现大量的边坡工程。山区公路自然地质条件复杂，由于自然因素（主要是降雨）和人为活动（公路建设）的影响，破坏了原有边坡的平衡条件，，可能产生边坡失稳、滑坡等路域地质灾害，继而可能对公路的通行和过往车辆、人员的安全产生重大影响。因此对边坡工程进行实时监测，并根据监测数据分析边坡的稳定性和对边坡在未来的变形趋势进行预测，对潜在的地质灾害及时地预测预报，从而降低或避免边坡垮塌、滑坡带来工程经济损失和人员伤亡事故显得尤为重要。本文在现已成熟的边坡监测技术基础上研究了基于激光测距技术的远程边坡表面位移监测系统，主要做了以下几个方面的工作： ①通过对比激光测距监测技术与其他监测技术的优缺点，得到在边坡变形监测与灾害预警预报系统中激光测距监测技术更具有优势。 ②简要介绍了激光测距技术的工作原理，分析了激光测距仪测量误差的来源，并给出了对应的修正公式和方法。 ③对激光测距远程监测系统工程应用现场影响因素进行分析，主要分析了现场环境因素和主观人为因素，并根据分析结果提出相应的现场改进措施。 ④利用已有的监测数据和宏观的地质资料分析得到边坡岩土体的力学参数，结合PLAXIS的强度折减模块和塑性模块分析获得边坡安全系数与边坡表面位移值的对应关系，制定了边坡表面位移变形阶段预警值的定性和定量的判定法。并利用灰色—马尔科夫模型预测法建立模型对边坡变形情况进行稳定性评价和潜在的地质灾害的预警预报。 ⑤针对渝湘高速公路水（江）武（隆）段K1691+100~K1691+400右幅边坡实际情况建立了激光测距远程边坡监测系统，实现了全自动化监测，并将监测数据分析结果与边坡实际情况进行比较，证明了该远程监测系统的实用价值，并成功应用到了南岸区弹广路K10+490-K10+610段左侧路堤失稳灾害治理监测工程中。
[Abstract]:With the rapid development of road traffic construction in China, a large number of slope projects appear in the process of highway construction.Due to the influence of natural factors (mainly rainfall) and human activities (highway construction), the balance conditions of the original slope are destroyed, which may lead to slope instability, landslide and other road geological disasters.This may have a significant impact on road traffic, traffic and safety of personnel.Therefore, the slope engineering is monitored in real time, and the stability of the slope is analyzed according to the monitoring data and the deformation trend of the slope in the future is forecasted, and the potential geological hazard is forecasted in time so as to reduce or avoid the slope collapse.1. By comparing the advantages and disadvantages of laser ranging monitoring technology with other monitoring techniques, it is concluded that laser ranging monitoring technology has more advantages in slope deformation monitoring and disaster early warning and forecasting system.2 the working principle of laser ranging technology is introduced briefly, the source of measuring error of laser rangefinder is analyzed, and the corresponding correction formula and method are given.3. The factors affecting the application of laser ranging remote monitoring system are analyzed, the field environment factors and subjective human factors are mainly analyzed, and the corresponding improvement measures are put forward according to the analysis results.(4) the mechanical parameters of slope rock and soil are obtained by the analysis of existing monitoring data and macroscopic geological data, and the corresponding relationship between slope safety factor and slope surface displacement is obtained by combining the strength reduction module and plastic module of PLAXIS.The qualitative and quantitative determination method of early warning value of slope surface displacement and deformation stage is established.The grey Markov model prediction method is used to establish the model to evaluate the stability of slope deformation and to predict the potential geological hazards.5. According to the actual situation of the right slope of K1691 100~K1691 400 section of Yu-Xiang Expressway, a remote monitoring system of laser ranging is established, which realizes full automatic monitoring, and compares the results of monitoring data analysis with the actual situation of the slope.The practical value of the remote monitoring system has been proved, and it has been successfully applied to the monitoring project of the instability of the left embankment in K10 490-K10 610 section of Dangguang Road, Nanan District.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.14;U412.2

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