Concealed tunnel base plate water draining treatment method and structure thereof

Abstract

A concealed tunnel base plate water draining treatment method comprises the steps that a water collecting pit is formed in the lower portion of a preliminary supporting concrete layer of a tunnel, and seepage water at a preliminary supporting bottom is drained to the water collecting pit; a baffle located at the upper portion of the water collecting pit and provided with a through hole is laid on the surface of the preliminary supporting concrete layer; a steel pipe penetrating through the through hole is arranged, one end of the steel pipe extends into the water collecting pit, and the other end of the steel pipe is connected with a self-priming pump for water pumping; after concealed tunnel construction is completed, the self-priming pump is removed, the steel pipe is grouted to seal the hole of the steel pipe, the water collecting pit can collect seepage water and underground accumulated water at the preliminary supporting bottom, a negative pressure is produced at a steel pipe port extending into the water collecting pit through the self-priming pump, the seepage water and the underground accumulated water flows out of the water collecting pit through the steel pipe, and the problem that a water body in the water collecting pit can be led out under the gravitational effect and accordingly water accumulation is caused is solved.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a drainage treatment method for the bottom plate of a buried tunnel and its structure. Background technique [0002] A tunnel is a building built underground or underwater or in a mountain, laying a railway or building a road for the passage of motor vehicles. According to its location, it can be divided into three categories: mountain tunnels, underwater tunnels and urban tunnels: mountain tunnels that pass under mountains or hills to shorten distances and avoid large ramps; The ones that pass through the seabed are called underwater tunnels; the ones that pass underground in cities to meet the needs of railways passing through large cities are called urban tunnels. [0003] After the tunnel is excavated, in order to stabilize the surrounding rock and ensure safe operation, it is necessary to build a layer of support structure with sufficient strength according to a certain o...

AI Technical Summary

Problems solved by technology

The underground water is collected and drained through the drainage conduit. The underground water in the drainage conduit flows from a high place to a low place under the action of gravity. The drainage conduit is flat in an ideal state, but in actual construction due to the If there are many stones, some parts of the drainage conduit will be lifted up by the stones during the laying process, and the ideal level cannot be achieved, and the underground water in the drainage conduit will not be able to flow out of the drainage pipe under the action of gravity. cause groundwater accumulation

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