舟曲江顶崖滑坡抗滑桩桩身响应监测分析

目前复杂地质条件滑坡抗滑桩工作状态下的受力变形研究仍不够充分。为了研究江顶崖堆积体滑坡抗滑桩的桩身响应，在抗滑桩内布置弦式钢筋应力计和埋入式应变计，对抗滑桩进行长期桩身应力-应变监测，基于监测数据建立计算模型计算抗滑桩全桩弯矩，用有限元软件PLAXIS 3D建立模型对抗滑桩进行研究。结果表明:监测到的单根钢筋最大应力为112.5 MPa，远小于设计值，弦式应变计最大应变为34 με；建立的单筋矩形截面受弯构件计算模型较为可靠，可用于类似工程中；有限元软件计算所得弯矩小于设计弯矩，两者变化趋势相同；抗滑桩目前处于安全状态，滑坡治理效果显著。

MONITORING ANALYSIS OF ANTI-SLIDE PILES FOR JIANGDINGYA LANDSLIDE IN ZHOUQU

At present, the research on the internal force and deformation of landslide anti-slide pile under complex geological condition is still insufficient. In order to study the response of the anti-slide pile for Jiangdingya talus landslide, string wire stress gauges and the embedded strain gauges were installed in the anti-slide piles to monitor the stress and strain. A new calculation model based on monitoring data and a FE model in PLAXIS 3 D were established for further study. The results show that the maximum stress of a single steel bar monitored is 112.5 MPa, which is much smaller than the design value, and the maximum stain is 34 με. The calculated model introduced in this paper is reliable and can be used on actual project. The bending moment calculated by the FE model is much smaller than the design value, but their change trends are consistent, which can prove that the monitored data are authentic and the FE model is reliable. The anti-slide piles are currently in a safe state and the treatment effect of Jiangdingya talus landslide is remarkable.