郭红东,白 杨,畅才源.湿陷性黄土边坡预应力锚索耐久性与改善措施研究[J].甘肃地质,2021,(2):59-65
湿陷性黄土边坡预应力锚索耐久性与改善措施研究
Durability and Improvement Measures of Prestressed Anchor Cable for Collapsible Loess Slope
  
DOI:
中文关键词:  黄土边坡  预应力锚索  耐久性研究  改善措施
英文关键词:loess slope  prestressed anchor cable  durability research  improvement measure
基金项目:甘肃省地矿局科研基金资助(201502)
作者单位
郭红东 1. 甘肃省地矿局第二地勘院甘肃 兰州 7300202. 甘肃水文地质工程地质勘察院甘肃 兰州 730020 
白 杨 3. 甘肃第七建设集团股份有限公司甘肃 兰州 730030 
畅才源 1. 甘肃省地矿局第二地勘院甘肃 兰州 7300202. 甘肃水文地质工程地质勘察院甘肃 兰州 730020 
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中文摘要:
      随着预应力锚索在湿陷性黄土边坡加固工程中的广泛应用,其耐久性问题就变得日益突出,湿陷性黄土边坡预应力锚索出现了较多因预应力损失而引起的失效事故。基于湿陷性黄土边坡预应力锚索运行现状进行研究,研究表明:黄土腐蚀性对边坡预应力锚索耐久性影响微弱,黄土湿陷性和地质条件变化对边坡预应力锚索耐久性影响显著;通过采用加强排水措施、提升浅部注浆工艺和注重运行维护等措施可以改善湿陷性黄土边坡预应力锚索耐久性;改善后的预应力锚索在监测期内处于平稳波动的服役状态,运行效果良好。本研究以期为湿陷性黄土边坡预应力锚索的设计、施工和运行维护等提供借鉴。
英文摘要:
      With the extensive application of prestressed anchor cable in the treatment of collapsible loess slope, the durability problem of prestressed anchor cable has become increasingly prominent. Based on the qualitative research on the operation status of prestressed anchor cable for collapsible loess slope, the influence factors of the durability of prestressed anchor cable for collapsible loess slope are investigated. The improvement measures that enhance the durability of prestressed anchor cable of collapsible loess slope are proposed preliminarily. The effect of improvement measures is examined by monitoring test. The results show that there are many failure accidents of prestressed anchor cable for collapsible loess slope due to the lack of durability. The influence of loess corrosivity on the durability of prestressed anchor cable is weak, and the influence of loess collapsibility and geological conditions on the durability of prestressed anchor cable is significant. The improvement measures that strengthen drainage measures, improve shallow grouting technology, and pay attention to operation and maintenance to improve the durability of prestressed anchor cable for collapsible loess slope are recommended. The improved prestressed anchor cable is in stable fluctuating service state during the monitoring period, and the improvement effect is good. The purpose of this paper is to provide reference for the design, construction, operation maintenance of prestressed anchor cable for collapsible loess slope.
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