Embedding and fixing method for protective tubes of deep water slope basement under variable water levels

Abstract

The invention discloses an embedding and fixing method for protective tubes of a deep water slope basement under variable water levels. The embedding and fixing method comprises the following steps that the telescopic protective tubes are manufactured; pay-off is conducted, and the position of a bridge pier is located; a construction platform is manufactured on floating boats and is dragged to the position of the bridge pier and fixed; pay-off is conducted on the construction platform, and the pile positions are determined; the inner protective tubes are placed through a crane and fixed to the construction platform; pebbles are thrown on the periphery of the construction platform; red soil is added in the protective tubes; a mixture of big sand and the red soil is added within the range of the construction platform; sand gravel is thrown on the upper portion of the big sand layer within the range of the construction platform; and underground concrete is poured on the upper portion of the sand gravel, and the outer protective tubes are mounted. According to the embedding and fixing method, the pebbles, the big sand and the red soil are placed in a throwing and filling manner, then the underground concrete is poured, and installing and fixing of the bottoms of the protective tubes on the slope basement are achieved; the self-developed protective tubes capable of extending and contracting freely are adopted so that the protective tubes can ascend and descend in a stepless manner to adapt to the water level changes; the protective tubes capable of extending and contracting freely and the construction platform are connected through universal wheels, and it is guaranteed that the positions of the protective tubes are fixed; and operation is facilitated, and the effect is good.

Description

technical field [0001] The invention relates to the technical field of foundation casing embedding of water conservancy projects, in particular to a method for embedding and fixing a casing of a foundation casing on a slope with variable water level and deep water. Background technique [0002] In water conservancy projects, it is very difficult to bury the base casing of slopes with variable water level and deep water, and there are many technical problems. For example, in the construction of pile foundations for the small Three Gorges Bridge in the Danjiangkou Reservoir of the South-to-North Water Diversion Project, the pier No. 1 is located on the bottom of the slope reservoir, and the water depth is up to 25 meters and the water level fluctuates frequently. These unchangeable natural conditions have caused great difficulties to the construction of the pile foundation, especially in the early stage of burying and fixing the casing, there are many technical difficulties. ...

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Problems solved by technology

[0002] In water conservancy projects, it is very difficult to bury the base casing of slopes with variable water level and deep water, and there are many technical problems. For example, in the construction of pile foundations for the small Three Gorges Bridge in the Danjiangkou Reservoir of the South-to-North Water Diversion Project, the pier No. 1 is located on the bottom of the slope reservoir, and the water depth is up to 25 meters and the water level fluctuates frequently. These unchangeable natural conditions have caused great difficulties to the construction of the pile foundation, especially the burying and fixing of the casing in the early stage, there are many technical difficulties

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