郑家湾滑坡体蠕变对上跨桥梁的影响分析

发布时间：2018-03-09 11:51

  本文选题：郑家湾滑坡　切入点：上跨桥梁　出处：《工程地质学报》2017年02期 　论文类型：期刊论文

【摘要】：当前滑坡蠕变对上跨桥梁影响研究甚少,实测数据更为匮乏。在对郑家湾滑坡体及上跨桥梁进行长期监测的基础上,根据深部位移监测数据推断出滑坡潜在滑面位置,分析了气象因素对滑坡及桥梁变形的影响,进而研究了滑坡蠕变与桥梁变形的相关性。研究表明:(1)郑家湾滑坡深约3~19m,月位移0.64~5.16mm,累积位移20~62mm,处于间歇性蠕滑状态。(2)降雨控制着郑家湾滑坡蠕变与桥梁变形,监测期间月最大降雨量390.2mm,此时滑坡与桥梁变形幅度最大,分别为2mm·月~(-1)和7mm·月~(-1)。(3)桥梁变形与滑坡蠕变具有同步性,两者月位移相差0.24~2.13mm,累积位移相差6.3mm。本文数据和结论对郑家湾滑坡治理及今后类似上跨桥梁滑坡的分析具有很好的借鉴意义。
[Abstract]:At present, there is little research on the influence of landslide creep on the upper span bridge, and the measured data are more scarce. Based on the long-term monitoring of the Zhengjiawan landslide and the upper span bridge, the location of the landslide potential slide surface is inferred from the monitoring data of the deep displacement. The influence of meteorological factors on landslide and bridge deformation is analyzed. Furthermore, the correlation between landslide creep and bridge deformation is studied. The results show that the depth of Zhengjiawan landslide is about 319m, the monthly displacement is 0.6455.16mm, and the cumulative displacement is 2062mm. The creep and bridge deformation of Zhengjiawan landslide are controlled by rainfall. During the monitoring period, the maximum monthly rainfall was 390.2mm, and the amplitude of landslide and bridge deformation was the largest, which were 2mm 路yue ~ (-1) and 7mm 路yue ~ (-1) and 7mm 路month ~ (-1) respectively) the deformation of bridge and the creep of landslide had synchronism. The difference between the monthly displacement and the cumulative displacement is 0.24 ~ 2.13 mm and 6.3 mm respectively. The data and conclusions in this paper can be used for reference for the treatment of Zhengjiawan landslide and the analysis of similar bridge landslide in the future.
【作者单位】： 长安大学公路学院;中国市政工程华北设计研究院;杨凌职业技术学院;长安大学地测学院;
【基金】：国家自然科学基金项目(41272285) 长安大学中央高校基本科研基金(2013G2211003,2014G2260009)资助
【分类号】：U442.2;P642.22
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本文编号：1588408