A construction method of rectangular steel lining for water conservancy and hydropower engineering dams

Abstract

The invention discloses a construction technique of hydraulic and water-power engineering. A construction method of a rectangular steel lining comprises the following steps that tabular component units are fabricated; a steel lining bottom plate is installed, and the bottom concrete is poured; steel lining side plates on the first layer are installed; the concrete of the steel lining side plates of the first layer is poured; steel lining side plates of the second layer are installed; the concrete of the steel lining side plates of the second layer is poured; the aforesaid steps are repeated till steel lining side plate installation of the highest layer and corresponding concrete pouring are completed; and a steel lining top plate is installed. According to the construction method of the rectangular steel lining, the rectangular steel lining and the concrete of the inner wall of a flowing water channel are constructed synchronously in a layered mode, the situation that pipe sections of the rectangular steel lining can be installed and fixed only after the concrete layer of the operating surface, for installing the rectangular steel lining, of the inner wall of the flowing water channel is completely poured, formed and cured is avoided, the manufacturing and installation technique of the rectangular steel lining is optimized, and the construction period is shortened; and all the faces composing the rectangular steel lining are manufactured into the standard tabular components, so that the construction technique is suitable for standard operation and industry production, and the construction efficiency is improved easily.

Description

technical field [0001] The invention relates to a water conservancy and hydropower project construction technology, in particular to a construction method of a rectangular steel lining. Background technique [0002] In dams or similar buildings of water conservancy and hydropower projects, it is often necessary to use steel linings to protect or reinforce the flow channel to avoid adverse effects of high-pressure water on the dam wall. This type of protection or reinforcement is usually in the flow channel The two side walls of the dam are reinforced by concrete pouring first, and then the steel plate lining is pasted on the concrete wall. However, because the size of the flow channel of the dam is usually very large, as long as 40-50m and 10-12m high, it is necessary to The size of poured concrete and laminated steel plate is larger. [0003] Usually, the size of a single steel plate is: 6-15m in length and 2-3m in width, and the steel plates need to be spliced ​​to meet t...

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Problems solved by technology

[0003] Usually, the size of a single steel plate is: 6-15m in length and 2-3m in width, and the steel plates need to be spliced ​​to meet the use requirements. After all the concrete layers on the surface are poured and formed, the rectangular pipe joints are hoisted in sections and then welded and reinforced. The construction period of the control includes the overall installation of the steel lining, welding, and external concrete pouring, among which only the normal external concrete layer The operation cycle needs 45~60 days, of which the control period is about 30 days, which makes the construction period of the steel lining part longer

Since most of the dam construction is the control point of the project, the traditional steel lining construction method will inevitably cause the construction period of this part of the dam to lag behind other dam sections, which will adversely affect the overall progress and management of the project

[0004] With the development of technology, further improvements have been made to the construction technology of the gate slot related to the steel lining, such as the Chinese patent: a construction method and device for the gate slot (application number: 2013100186843), the installation of the gate slot and the simultaneous rise of the concrete Construction, the second-phase installation of the door slot is converted to the first-phase concrete simultaneous construction and installation, which simplifies common complex construction methods and speeds up the overall construction progress of the project. The speed of the dam becomes the key factor to shorten the construction period of the dam

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