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送电线路经过河网、水田和一些地下水位较高的地区时,土方工程常用的施工方法是支设挡土板,但由于大量地下水和流砂的涌入,使得挖坑工作非常困难。送电线路通常在流砂和泥水坑地质条件下多采用重力式基础,在北方寒冷地区还要考虑冻胀对基础的影响,基础埋深一定要在冻层以下,这样就对采用简易沉井技术提出了要求。沉井技术在桥梁建筑上使用已较普遍,但送电线路杆塔基础因为埋深浅,大型沉井机械很难适应线路现场施工。为此,本文介绍一种适用于送电线路基础工程的沉井施工方法,它已在220kV凌曙送电线路中应用,取得了较好
When the power transmission lines pass through river networks, paddy fields, and some areas with high groundwater levels, commonly used construction methods in earthworks are support retaining plates. However, due to the influx of groundwater and quicksand, the digging work is very difficult. Transmission lines usually adopt gravity-type foundations in the geological conditions of quicksand and muddy water pits, and the impact of frost heaving on the foundation must also be considered in the northern cold regions. The foundation depth must be below the freezing layer, so that the use of simple open caisson technology is necessary. Asked for a request. The use of open caisson technology has become more common in bridge construction. However, due to the shallow depth of the transmission line pole tower foundation, large-scale caisson machinery is difficult to adapt to the site construction. For this reason, this article describes a caisson construction method that is suitable for the basic project of transmission lines. It has been applied in the 220kV transmission line and has achieved good results.