Buffer system for draining local burst gushing water of tunnel and control method

Abstract

The invention discloses a buffer system for draining local burst gushing water of a tunnel. Accumulated water in the tunnel is drained to the outside of the tunnel through a central ditch, a burst water gushing area on the outer side of the tunnel is provided with a water collecting tank, a buffer tank is arranged on the outer side of the water collecting tank, the water collecting tank is connected with the buffer tank through a drainage channel, the buffer tank is connected with the central ditch through a drainage pipe, a valve is mounted on the drainage pipe, a drainage pump is arranged in the buffer tank, and a water outlet of the drainage pump is connected with a water inlet of the drainage pipe. The invention further discloses a control method of the buffer system for draining local burst gushing water of the tunnel. The drainage pump and the valve on the drainage pipe are opened or closed according to the water height of a position, corresponding to the buffer tank, in the central ditch, so that water in the buffer tank is cleared as far as possible, and the quantity of water in the central ditch is kept in the maximum flow value of the central ditch. Local burst gushing water of the tunnel is timely collected and drained by the aid of the temporary water storage function of the buffer tank, pressure is safely relieved, and safety of the tunnel is facilitated.

Description

technical field [0001] The invention relates to an auxiliary drainage system in a tunnel, in particular to a buffer system and a control method for solving local sudden water gushing in a tunnel. Background technique [0002] Since the tunnel is built under the surface, the water gushing in the stratum karst erodes the tunnel all the time, causing water leakage in the tunnel. Leakage in the tunnel not only greatly reduces the service life and functions of various facilities in the tunnel, but also has a great impact on the operating environment for safe driving in the tunnel. In order to ensure the safety and normal operation of the tunnel, it is necessary to do a good job in waterproofing and drainage of the tunnel. In the area where the sudden torrential rain on the surface causes the local sudden water gushing of the tunnel, if the drainage capacity in the tunnel is insufficient, it will easily lead to water accumulation in the tunnel. In addition, if the local sudden wat...

AI Technical Summary

Problems solved by technology

[0004] Aiming at sudden local water gushing in the tunnel caused by sudden torrential rain on the surface, on the one hand, the water pressure outside the surrounding rock of the tunnel will cause a lot of pressure on the tunnel structure, which has not been considered in the existing tunnel design. On the other hand, due to In case of local sudden water gushing, the amount of water gushing collected by the circular drainage blind pipe will increase, and the amount of water gushing into the central ditch will increase, which will increase the drainage pressure of the central ditch to a certain extent, which will easily lead to insufficient drainage capacity of the central ditch. When the tunnel water overflows to the surface of the tunnel through the central ditch, it will bring certain safety hazards to the use of various facilities in the tunnel and driving safety. The existing tunnel design also fails to take this situation into consideration.

Images