180-m large-span steel pipe arch pouring method

Abstract

The invention discloses a 180-m large-span steel pipe arch pouring method. The method includes the following steps of sprinkling arrangement, steel pipe arch observation, pump pipe connection, inspection conducted before pouring, cement grout conveyance and washing. The method has the beneficial effects that the problems that the pumping distance is long and the pumping height is large can be solved through a designed large-power pump machine; special slow setting cement grout is adopted so that the effects of pipe lubrication resistance reduction and concrete moisture dissipation speed reduction can be achieved; water heads are arranged at the top of an arch, automatic sprinkling devices are arranged every two meters, the temperature of steel pipes is effectively reduced, and it is guaranteed that the concrete setting speed is reduced; and in the process, multiple tank trucks are adopted for continuously pumping concrete, and it is guaranteed that the concrete is supplied continuouslyand ceaselessly.

Description

technical field [0001] The invention belongs to the technical field of steel pipe arch pouring, and in particular relates to a 180m long-span steel pipe arch pouring method. Background technique [0002] The concrete-filled steel tube arch bridge is a kind of steel-concrete composite structure. Concrete-filled steel tube arch bridges are filled with concrete in the steel tubes, and the expansion of the compressed concrete is limited due to the radial constraints of the steel tubes, so that the concrete is in a three-dimensional compression state, thereby significantly improving the compressive strength of the concrete. [0003] However, the previous long-span steel pipe arch pouring has the following deficiencies: [0004] 1. In the past pouring process, it was often due to insufficient power for pumping concrete or the use of hydraulic pipes and unreasonable concrete configuration; [0005] 2. Improper cooling measures during the pouring process; [0006] 3. The disconti...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for pouring a 180m long-span steel pipe arch, so as to solve the problems in the past large-span steel pipe arch pouring proposed in the above-mentioned background technology because of insufficient power for pumping concrete or the use of hydraulic pipes in the past pouring process. And the concrete configuration is unreasonable; the cooling measures are improper during the pouring process; the concrete discontinuity during the pouring process causes the steel pipe concrete to be not dense or there is an interruption void on the site, which affects the safety of the structure

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