某架空输电线路一塔基处古滑坡判识研究

Study on the Detection of Ancient Landslides at Transmission Tower's Foundation

随着特高压架空输电线路发展迅速,线路通道的选择和杆塔塔基的稳定性是整个工程的重点。选择地质条件良好地段作为线路通道,可较大程度降低崩塌、滑坡、泥石流等地质灾害对线路安全的影响。但随工程建设深入,电网密集化程度增加,所遇地质灾害问题也复杂多变。其中一种具有极强隐蔽性、不为人所容易识别、受扰动敏感的地质灾害—古滑坡,由于其发生年代久远,地貌地形上已不具备现代滑坡所特有的一些特征,其不易为人识别的特点,使得在建设选址初期对该种问题关注不足。此外,古滑坡受扰动敏感这一特点,使其极易发生失稳滑动,在影响工程建设进展的同时造成巨大经济损失甚至人员伤亡。因此,如何对古滑坡进行判识,并作出相应避让措施,是目前工程建设过程中所需研究的一个重点。

The construction of ultra-high voltage overhead transmission lines has progressed quickly in recent years,and the project's main focuses are the choice of line channels and the stability of tower foundations.The influence of geological disasters like collapses,landslides,and mudslides on the safety of the route can be significantly reduced by selecting a stretch with favorable geological conditions as the route passage.However,as engineering development advances,power grid density rises and the issues associated with geological disasters become more complicated and unpredictable.Ancient landslides are one of the geological risks that are well concealed,hard to spot,and vulnerable to perturbations.Due to their lengthy history and lack of distinctive topographic characteristics,current landslides are difficult for humans to identify,which has resulted in a lack of awareness of this problem during the first phases of choosing a construction site.Additionally,because to their susceptibility to perturbations,ancient landslides are particularly vulnerable to unstable sliding,which not only hinders technical building but also results in significant financial losses and even fatalities.Therefore,a crucial study area in the present engineering building process is how to recognize historical landslides and adopt appropriate avoidance measures.