Pressurized tunnel lining structure accelerated corrosion test device and pressurization control method

Abstract

The invention discloses a pressurized tunnel lining structure accelerated corrosion test device, which comprises a water storage tank arranged outside the tunnel lining structure and used for accumulating corrosive liquid, a vertical pull rod, a beam, a piston, a sealing plate, an electric cylinder, and a speed reducer , motor, pressure sensor and controller, the pressure sensor is installed at the bottom of the water storage tank, the pressure sensor and the motor are respectively connected to the controller, the motor drives the reducer, electric cylinder, piston and sealing plate in turn, and the sealing plate is placed in the water storage tank Inner top. The invention also discloses a pressurization control method adopted by a pressurized tunnel lining structure accelerated corrosion test device. The operation of the motor is controlled by collecting the data of the pressure sensor, thereby accurately controlling the pressure of the corrosive liquid in the water storage tank on the outside of the tunnel lining structure . The invention can accurately and truly simulate the actual service environment of the tunnel lining structure under the action of water pressure, and provide more reliable test basis for the design and maintenance of 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...

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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 reflect the corrosion environment of the tunnel lining. The reliability of the test results as the basis for tunnel design and maintenance tests needs to be improved.

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