±500kV直流线路工程多冰区与结构工程量关系研究

Research on the Relationship Between Structural Engineering Quantitie and Multi Ice Area of ± 500kV DC Tansmission Line Engineering

[目的]塔重和基础混凝土量是线路工程中重要的工程量指标。文章通过对比云贵互联通道工程新设计10 mm、15 mm、20 mm、30 mm、40 mm冰区典型杆塔的塔重及基础混凝土量,探究冰区对塔重和基础混凝土量的影响。[方法]文章进行了杆塔部件分析,全面认识了各部件与杆塔总重量的关系;通过不同冰区塔重和基础混凝土量的比对分析,研究了不同冰区与塔重和基础混凝土量的关系。[结果]分析表明:耐张塔变坡以下塔身占总塔重的比例最大;直线塔横担、变坡以上塔身、变坡以下塔身均在总塔重中占有较大份额;覆冰对直线塔重量的影响大于耐张塔,30mm冰区塔重增速最大;覆冰对耐张塔基础混凝土量的影响大于直线塔,30 mm冰区杆塔基础混凝土量增速最大。[结论]不同冰区杆塔的工程量存在一定的比例关系,可为以后的直流线路工程量的估算提供参考。

[Introduction] Tower weight and foundation concrete quantity are important indexes in transmission line engineering. By comparing the tower weight and foundation concrete quantity of 10 mm, 15 mm, 20 mm, 30 mm and 40 mm ice area typical towers used in YunGui interconnection channel project, this paper explores the influence of ice area on tower weight and foundation concrete quantity. [Method] The components of the tower were analyzed and the relationship between each component and the total weight of the tower was fully understood;Through the comparison and analysis of tower weight and foundation concrete quantity in different ice areas, the relationship between different ice areas and tower weight and foundation concrete quantity was studied. [Result] The analysis shows that for the tension tower, the proportion of the tower body below the variable slope to the total tower weight is the largest;for the tangent tower, the cross arm, the tower body above the variable slope and the tower body below the variable slope all account for a large proportion of the total tower weight;the influence of ice area on the weight of tangent tower is greater than that of tension tower, and the increase of tower weight in 30 mm ice area is the largest;the influence of ice area on the concrete content of tension tower foundation is greater than that of tangent tower, and the increase of concrete content of tower foundation in 30 mm ice area is the largest. [Conclusion] There is a certain proportional relationship between the structural quantities and different ice areas,which can provide a reference for the estimation of the quantities of DC transmission lines in the future.