斜柱斜面输电铁塔基础的计算要点及施工技术

近年来,在西北750 kV超高压输电线路工程的开挖回填类基础中,在终端塔、转角塔基础中广泛应用了塔脚板垂直方向的斜柱斜面基础.此种基础立柱顶面与斜立柱棱线垂直,不再呈水平面.直地脚螺栓与立柱坡度一致,倾斜锚固于立柱钢筋混凝土中.介绍了此类新型铁塔基础的特点,并详述其异形立柱模板、不等长柱主筋、找正测量等计算要点及基础施工技术控制难点,可为广大技术人员提供参考方案.

Calculation Key Points and Construction Technology of Inclined Column and Oblique Top Surface Tower Foundation

In recent years, in the excavation of backfill foundation in northwest 750 kV UHV power transmission project, the inclined column and oblique top surface of foundation in vertical direction of the tower plate has been gradually widely used in the foundations of terminal tower and corner tower, whose column top surface is vertical to the inclined column ridge, and no longer a horizontal plane. The straight anchor bolt has the same slope with column, and the inclined anchor is fixed on reinforced concrete column. This paper introduces the characteristics of this new type of tower foundation, and describes the calculation points and control difficulty of the column template with irregular shape, the unequal-length column＇ s main reinforcement and the measurement positioning of foundation construction technology, which could provide references for technical workers.