Power transmission line tower foundation and construction method: Fid-Bau Portal

Power transmission line tower foundation and construction method

QIAN BO / LIN XIANGJUN / ZHANG JINLONG / YANG WENZHI / QIU YUNFENG / CUI QIANG / DING SHIJUN / QI HAO

The invention provides a power transmission line tower foundation and a construction method, and the construction method comprises the following steps: punching a plurality of anchor holes (4) in a rock layer according to design positions by utilizing a punching device, and respectively inserting and fixing a plurality of anchor bars (2) into the corresponding anchor holes (4); the set number of open caissons (3) penetrate through the anchor bars (2) through a pressurizing device and sink into the soft soil layer until reaching the set position, and an open caisson foundation is formed; and a bearing platform (1) is poured right above the open caisson foundation to form the power transmission line tower foundation. According to the construction method provided by the invention, the soil body does not need to be excavated in a large area in the construction process, the whole construction process is relatively environment-friendly, the anchor rod is used as a counter-force pile to carry out open caisson sinking operation, a balancing weight, additional construction of the counter-force pile or manual underground operation are not needed, the construction cost is effectively reduced, the foundation bearing capacity is improved, and potential safety hazards are reduced.

本发明提供一种输电线路杆塔基础及施工方法，包括：利用打孔装置在岩石层中按照设计位置打出多个锚孔(4)，将多个锚筋(2)分别插入并固定在对应的锚孔(4)中；利用加压装置使设定数量的沉井(3)贯穿所述多个锚筋(2)，并沉入软土层中直至设定位置，构成沉井基础；在所述沉井基础正上方浇筑承台(1)，构成输电线路杆塔基础。通过本发明提供的施工方法在施工过程中无需对土体进行大面积挖除，整体施工过程较为环保，且将锚杆作为反力桩进行沉井下沉操作，无需配重块、额外施工反力桩或人工地下作业，有效降低施工成本、提高基础承载力、减少安全隐患。

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