摘要
山区输电杆塔多建于山坡上,具有勘察资料不全、无边坡支护措施等特点,塔基山坡稳定性已成为影响输电线路正常运行的重要因素。基于改进的属性识别模型,对塔基山坡稳定性进行评价分级。首先,对某区域内山坡的稳定性影响因素进行分析总结,选择山坡坡角、坡面形态、植被发育特征、岩土体特征、降雨入射角、风化作用以及人类活动程度7个因素作为塔基山坡的稳定性评价指标,采用综合赋权法确定各指标权重;然后在构建各评价指标的属性测度函数过程中,重新推导单指标等级划分中次高级别和最高级别的单指标属性测度函数,使其更加规范适用;最后采用灰色关联度对塔基山坡稳定性进行识别分级。该方法应用于广东省中山市输电杆塔塔基山坡稳定性评价分级中,评价结果与山坡的现场实际情况吻合较好,为输电杆塔塔基山坡的稳定性评价分级提出了一种有效途径。
The hillsides under the transmission towers have the characteristics including little investigation information and no supporting measures. Stability of the hillsides under transmission towers is one of the important factors for the normal operation of transmission lines. The stability evaluation of hillsides is realized based on an improved attribute recognition model. Firstly, according to influence factors of hillsides＇ instability in a certain area, hillside angle, landform, vegetation development characteristics, rock mass and soil characteristics, incident angle of rainfall, weathering and degree of human activity are selected as the stability evaluation indicators of hillsides. The comprehensive empowering method is used to determine the weight of the evaluation indicators. Then the single index attribute measurement functions of the highest level and second highest level in the grading criteria are analyzed and presented in detail to be more formal so that all attribute measurement functions are rigorously constructed to compute attribute measurement of single index. Finally, the stabilityidentification and classification of hillsides under the transmission towers are recognized by Grey Relational Analysis. This method is applied to the hillsides under the transmission towers in Zhongshan, and the assessment results do agree well with the results of the practical condition, so as to provide an effective method for the stability evaluation of hillside under the transmission tower.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2016年第A01期3138-3146,共9页
Chinese Journal of Rock Mechanics and Engineering
基金
中国南方电网有限责任公司科技项目(K-GD2013–0222)
湖北省自然科学基金重点项目(杰青类)(2014CFA026)
霍英东基金项目(131072)~~
关键词
边坡工程
输电杆塔
山坡
属性识别
灰色关联度
稳定性评价
slope engineering
transmission tower
hillside
attribute recognition
grey correlation degree
stabilityevaluation
