新近填土架空输电线塔长期沉降预测分析  

LONG-TERM SETTLEMENT PREDICTION ANALYSIS OF OVERHEAD TRANSMISSION TOWER ON RECENT FILL

作　　者：苏晓学 曹宇清 温燕萍 安向勇 张立伟 朱丙龙 姚仰平[3] 艾力夏提·吐尔迪 SU Xiaoxue;CAO Yuqing;WEN Yanping;AN Xiangyong;ZHANG Liwei;ZHU Binglong;YAO Yangping;AILIXIATI Tuerdi(Economic and Technological Research Institute of State Grid Shanxi Electric Power Company,Taiyuan 030002,China;State Grid Electric Power Company,Taiyuan 030021,China;School of Transportation Science and Engineering,Beihang University,Beijing 100083,China)

机构地区：[1]国网山西省电力公司经济技术研究院,太原030002 [2]国网山西省电力公司,太原030021 [3]北京航空航天大学交通科学与工程学院,北京100083

出　　处：《工业建筑》2020年第4期54-59,18,共7页Industrial Construction

基　　金：国家自然科学基金项目(51979001);国网山西省电力公司科技项目(SGSXJY00PSJS1800005)。

摘　　要：输电线塔混凝土基础的沉降计算是输电线路设计的重要依据,混凝土基础的沉降监测是发现输电线塔倾斜的常用手段。分层总和法是工程中常用的地基沉降计算方法,根据已有监测沉降预测未来沉降的曲线拟合算式较多,蠕变沉降实用算法是其中参数较少、物理意义较为明确的一种。分别采用分层总和法、蠕变沉降实用算法、三点法和双曲线法对山西省阳泉市铝土矿回填场地架空输电线塔基础的沉降进行计算和长期预测,结果表明蠕变沉降实用算法具有较好的适用性。为了解决曲线拟合式的可信预测区间问题,蠕变沉降实用算法给出了有效预测区间原理,预测了混凝土基础在给定误差限时的有效预测时间。Prediction about settlement of concrete foundation for transmission line tower is an important basis for designing transmission line.Settlement monitoring of foundation is a common method to detect the inclination of transmission tower.The calculation method of foundation settlement commonly used in engineering is layer-wise summation method,and there are many curve fitting formulas for predicting future settlement based on the existing monitoring settlement.The practical creep settlement algorithm is one with few parameters and clear physical significance.In the paper,the layer-wise summation method,creep settlement practical algorithm,the three-point method and hyperbolic method were used to calculate and predicte the foundation settlement of the overhead transmission tower on the bauxite backfill site in Yangquan,Shanxi.The results showed that the practical creep settlement algorithm had good applicability.In order to solve the problem of credible prediction interval of curve fitting formula,the effective prediction interval principle was given by the practical creep settlement algorithm.At last,the effective prediction time of concrete foundation with given error limit was predicted.

关 键 词：填土 长期沉降 蠕变沉降实用算法 有效预测区间 

分 类 号：TM75[电气工程—电力系统及自动化]