Pressurization type accelerated corrosion test device of tunnel lining structure, and pressurization control method

Abstract

The invention discloses a pressurization type accelerated corrosion test device of a tunnel lining structure. The device comprises a water storage tank arranged on the outer side of the tunnel liningstructure and used for accumulating corrosive liquid, a vertical pull rod, a cross beam, a piston, a sealing plate, an electric cylinder, a speed reducer, a motor, a pressure sensor and a controller,wherein the pressure sensor is installed on an inner bottom of the water storage tank, the pressure sensor and the motor are respectively connected with the controller, the motor drives the speed reducer, the electric cylinder, the piston and the sealing plate in sequence, and the sealing plate is placed at the top of an inner end of the water storage tank. The invention further discloses a pressurization control method adopted by the pressurization type accelerated corrosion test device of the tunnel lining structure. The operation of the motor is controlled by collecting the data of the pressure sensor so as to accurately control the pressure of the corrosive liquid in the water storage tank on the outer side of the tunnel lining structure. The pressurization type accelerated corrosion test device disclosed by the invention can accurately and truly simulate the actual service environment of the tunnel lining structure under the action of water pressure, and provides a more reliable test basis for the design and maintenance of the tunnel engineering.

Description

technical field [0001] The invention relates to a tunnel lining structure corrosion test device, in particular to a pressurized tunnel lining structure accelerated corrosion test device capable of simulating water pressure penetration and a pressurization control method. Background technique [0002] With the development of the national economy and the rapid advancement of urbanization in all countries in the world, large-scale shield tunnel projects such as long-term traffic tunnels and urban subway tunnels will continue to emerge. Due to its characteristics of huge one-time investment and difficult maintenance and reconstruction, higher requirements are put forward for the long-term safety and service performance of the shield tunnel segment lining structure. For the shield tunnel segment lining structure in service period, its occurrence environment is more complex: on the one hand, the specific Cl in the erosive environment - , Mg 2 + Such corrosive ions will slowly i...

AI Technical Summary

Problems solved by technology

[0006] Therefore, the current test method using non-pressure corrosion solution does not match the real environment of the tunnel lining, and cannot truly refle

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