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目前,对输电线路工程造价水平的研究通常都是针对整个输电线路项目,而对占到总造价30%~50%的基础工程缺乏相关研究。本文选取西南地区输电线路设计中常见的五种地质情况(普通土、松砂石、泥水坑、坚土、岩石)和四种基础类型(板式基础、掏挖基础、人工挖孔桩基础和灌注桩基础)进行技术经济分析,根据典型技术指标进行基础造价计算,比较推荐每种地质条件下最经济的基础型式,结合工程实际,从安全、环保和经济三个方面对四类基础类型进行效益分析,针对各种影响因素和基础型式的各自特点,选择最优的基础型式。
At present, the research on the transmission line project cost level is usually aimed at the entire transmission line project, while the lack of relevant research on the basic project accounting for 30% ~ 50% of the total cost. In this paper, five kinds of common geological conditions (ordinary soil, loose sand, mud puddles, strong earth and rock) and four basic types (plate foundation, excavation foundation, artificial foundation and perfusion Pile foundation) for technical and economic analysis, according to the typical technical indicators of basic cost calculation, comparison and recommend the most economical basis for each type of geological conditions, combined with the actual project, from three aspects of safety, environmental protection and economic benefits of the four basic types Analysis, for a variety of factors and basic types of their own characteristics, choose the most basic type.