某二级高边坡健康监测试验研究与分析

近年来,随着中国建设事业规模的增大,多级高边坡工程安全问题日益突出,对边坡工程进行监测预警尤为必要。依托舟曲灾后重建项目某二级高边坡项目,建立了一套综合立体的自动化监测系统。通过对边坡内力、位移的监测与分析,发现了边坡在施工和运营阶段的一些变化特征和规律:边坡支护初期,应力、位移变化的幅度较大;随着支护结构与边坡内部岩体的相互调整,二者变化趋于平稳。该边坡运营阶段的最大位移变化速度为0.25mm/d0.5mm/d,监测点最大位移累积变化量小于10 mm;格构梁的内力与变形也均处于弹性范围之内。综合各项监测结果可以得出,支护结构对该边坡起到有效的加固效果,该边坡在运营阶段处于稳定状态。该试验对今后同类边坡的加固设计与监测分析具有一定的参考价值。

Health monitoring tests on a secondary high slope

In recent years, with the increasing scale of construction in China, the safety issues of multistage high slope have become increasingly prominent, and it is necessary to monitor and warn the slope work. A comprehensive three-dimensional automatic slope monitoring system based on a high slope reinforcement work instance of Zhouqu reconstruction project after disaster is established. Through monitoring and analysis of the slope of stress and displacement, it is found that the changes of the slope in the characteristics and laws during the construction and operational phases are: as follows during the initial phrase of slope support, the stress and displacement amplitude is greater. With the mutual adjustment of internal support structure and rock slope, both changes are stable. The maximum displacement speed of this slope is 0.25 mm/d﹤0.5 mm/d, accumulated variation of the maximum displacement is less than 10 mm. The force and deformation lattice beams are also in the elastic range. Based on the monitoring results, it can be drawn that the anchor lattice beam can play an effective reinforcement effect, and during the operational phase this slope is in a stable state. The test has certain reference value for the reinforcement design and monitoring analysis of similar slopes in the future.