Steel tube arched concrete dam and construction method

Abstract

The invention discloses a steel tube arched concrete dam which is characterized in that a plurality of arched steel tubes are overlapped into an arched dam; ventilation holes are reserved in the middle of arched steel tubes; concrete is filled in the arched steel tubes; arched leg bottom steel plates are welded at two ends of the arched steel tubes and are arched with rock; and concrete protective layers are cast around the steel tubes. The construction method comprises the following steps of: prefabricating the steel tubes by a factory in section and reserving the ventilation holes in the middle of the steel tubes; forming an integral arch by welding on the construction filed and then hoisting the integral arch to a plane at the dam bottom to form a first path of steel tube arch; filling concrete at one side of the steel tube arch and finishing the filling until the concrete is poured out from the other side to form steel tube concrete; welding the steel tubes and the arched leg bottom steel tubes arched on the rock; overlapping the steel tubes layer by layer by using the same construction method to the design elevation of a top surface of a dam body; and casting concrete protective layers at two sides of the steel tubes. The invention bears a main load by using the arched steel tube concrete overlapped to the design elevation from the dam bottom as an arch body according to the forced characteristics of the steel tube concrete, thereby greatly reducing the dam top section, further saving the material consumption, reducing the hydration heat, and being convenient to construct.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a steel pipe concrete arch dam and a construction method. Background technique [0002] An arch dam is a kind of dam built in a canyon, made into a horizontal arch, with the convex side facing upstream, and the two ends clinging to the canyon wall. It refers to a water-retaining building that bends upstream on the plane, is curved, and can transmit part of the horizontal load to both sides of the bank. It is a space shell structure. [0003] An arch dam is an arched water-retaining structure that is convex to the upstream on the plane, and all or part of the water pressure is transmitted to the bedrock on both sides of the valley by the action of the arch. Compared with the gravity dam, under the action of water pressure, the stability of the dam body does not need to rely on its own weight to maintain, but is mainly supported by the reaction of the bedrock...

AI Technical Summary

Problems solved by technology

[0004] However, most of the current arch dams are reinforced concrete structures, which mainly have the following problems: due to the huge volume of the arch dam, the consumption of materials (such as concrete and steel bars) is also large; a large amount of heat of hydration will be generated during construction, causing temperature crack

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