山区输电塔边坡成灾模式及塔基失效类型  

Disaster Mode of Transmission Tower Slope in Mountainous Regions and Failure Type of Tower Foundation

作　　者：林文华 叶诚耿 王浩[2] LIN Wenhua;YE Chenggeng;WAN GHao(Fujian Xianyou Pumped Storage Power Co.,Ltd.,Putian,Fujian 351267,China;College of Environment and Resources,Fuzhou University,Fuzhou,Fujian 350116,China)

机构地区：[1]福建仙游抽水蓄能有限公司,福建莆田351267 [2]福州大学环境与资源学院,福建福州350116

出　　处：《水利与建筑工程学报》2019年第6期50-54,共5页Journal of Water Resources and Architectural Engineering

基　　金：国网新源公司科技项目(XY-2018F03-2-84);福建省自然科学基金项目(2018J01746)

摘　　要：基于山区输电塔边坡与铁塔的空间位置关系、边坡变形对铁塔的作用机制及典型失效案例的调查与分析,厘清输电塔位边坡的4种典型成灾模式,即:塔基上部边坡失稳,使铁塔因超覆荷载冲击产生倾覆;塔基跨越不稳定边坡,因边坡变形,使塔基因沉降差或倾斜量偏大导致铁塔倾斜;塔基下部边坡变形,削弱塔基侧向约束,诱发塔位边坡松动变形危及塔基安全;塔基位于边坡体内,因边坡变形破坏诱发塔基整体移位;在此基础上,总结提出3种塔基失效类型:斜坡变形引起塔基沉降;斜坡滑移诱发杆塔移位;斜坡失稳冲击杆塔倾覆。Based on the spatial location between tower foundations and slopes in the electric transmission line in mountainous regions as well as investigation and analysis of mechanism of effect of slope deformation on the tower and typical failure cases, the spatial model between tower foundation and slope is clarified as below: the impacts of the overloaded caused by the deformation or instability of the slope above the tower foundation result in the deformation and instability of tower foundation;the deformation and instability of the slope lead to the differential settlement or large lean degree, which cause the deformation and instability of tower foundation that across the unstable slope;the deformation or instability of the slope below tower foundation weaken the constraint of lateral deformation of the tower foundation, and the traction of the base slope of tower foundation caused by traction can jeopardize stability and safety of the tower foundation;the overall deformation and failure of landslide bring out displacement of the tower foundation that locate in the landslide body. Three typical failure modes of tower foundation are summarized based on the analysis of the model of transmission line slope on tower and the mechanism of deformation and failure: slope deformation cause settlement of tower foundation, slope slip lead to displacement of tower and slope instability overturn tower.

关 键 词：输电线 斜坡 杆塔 变形破坏 

分 类 号：P642.22[天文地球—工程地质学]