Large-scale wading ring-shaped rigid foundation and construction method thereof

Abstract

The invention relates to a large-scale wading ring-shaped rigid foundation and a construction method thereof. An inner well wall is arranged in the position, 20-25 m away from an outer well wall, of the interior of the outer well wall. A sealed ring-shaped body is formed by placing a ring-shaped cover plate on the upper portion of the inner well wall and the upper portion of the outer well wall and pouring ring-shaped bottoming concrete to the lower portion of the inner well wall and the lower portion of the outer well wall. Partition walls are arranged between the inner well wall and the outer well wall. The construction method comprises the steps that 1, after being manufactured in the land or a dock, foundation base section steel shells of steel shell concrete enter the water and are floatingly transported to a scene to be positioned precisely, watering and sinking are conducted, and after a bed is stable, the steel shell concrete is poured; 2, the well walls and the partition walls are heightened through reinforced concrete and sunken through soil sampling, when soil is sunken to a design elevation, bottom clearing is conducted, and the bottoming concrete is poured; and 3, top cover plate concrete is poured, and an overall ring-shaped forced structure is formed. According to the large-scale wading ring-shaped rigid foundation and the construction method thereof, the foundation is designed to be a ring-shaped deeply-buried-type rigid foundation in accordance with a high-rise structure with the characteristics of being large in electric tower foundation horizontal force, bending moment and foundation top surface construction size, and a part with the small stress in the middle is hollowed out skillfully; compared with an ordinary sunk well foundation, a large number of materials are saved, and the integrity, the loaded property and the economy are good.

Description

technical field [0001] The invention relates to a large-scale wading ring-shaped rigid foundation and a construction method thereof. Background technique [0002] When the power grid crosses large rivers or bays, it is difficult to span across the water due to the wide water surface, so electric towers need to be installed in the water. Especially in the lower reaches of the Yangtze River or in the sea area, the shipping is busy and the waterway level is high, so the span of the tower must be increased. At present, the span of the proposed tower reaches 2.6km, the height of the main tower reaches 465m, and the bottom size of the tower reaches 85×85m. Due to the deep water depth and the local erosion of the foundation, the free length of the foundation is about 45m; however, the waters are of high navigability level, and the ship collision force reaches 12,900 tons; the tower height is 465m, the horizontal force caused by the wind is 9,200 tons, and the bending moment at the...

AI Technical Summary

Problems solved by technology

If the pile group foundation is adopted, since the free length of the pile foundation is up to 45m, the foundation’s ability to resist horizontal loads is poor, the foundation scale is large, and the economy is poor

The foundation of the caisson is a rigid foundation with strong resistance to horizontal loads, but the size of the bottom of the tower is 85×85m, so the size of the foundation of the caisson is controlled by the structure, not by force, and the engineering volume is large and the economy is not good

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