Shaft bottom water collecting and draining system for long and large inclined shaft of railway tunnel

Abstract

The invention discloses a shaft bottom water collecting and draining system for a long and large inclined shaft of a railway tunnel. Various trenches used for collecting and draining water are formedin the shaft bottom of the long and large inclined shaft so as to achieve centralized pumping and draining of the underground water to guarantee safety of work area construction of the long and largeinclined shaft of the tunnel. The shaft bottom water collecting and draining system comprises a water collecting trench and a water draining trench which are formed in the shaft bottom of the inclinedshaft, and a pump room for centralized mounting of pumping and draining equipment is arranged in the water draining trench; the water collecting trench is composed of a water collecting bin and a water collecting shaft, the water collecting bin is formed between the tunnel and the inclined shaft, the top elevation of a pit of the water collecting bin is lower than the bottom elevation of a pit ofthe pump room, the underground water in the low-end tunnel is pumped and drained into the water collecting bin, the underground water in the high-end tunnel is intercepted at the intersection of thewater collecting bin and the tunnel and then collected into the water collecting bin, and the water storage capacity of the water collecting bin is larger than the maximum water inflow of the tunnel;and the water collecting shaft is formed in the bottom of the side, close to the pump room, of the water collecting bin and connected with the pump room and the water collecting bin, the water level in the water collecting shaft is consistent with that in the water collecting bin, and centralized pumping and draining of the underground water in the water collecting bin by the pumping and drainingequipment in the pump room are guaranteed.

Description

technical field [0001] The invention relates to a railway tunnel, in particular to a collection and drainage system at the bottom of a long inclined shaft of a railway tunnel. Background technique [0002] In recent years, my country's railway tunnel engineering has developed rapidly, and a large number of extra-long railway tunnels have been built in the western region. In order to realize "long tunnels and short tunnels" and take into account the problems of tunnel ventilation and drainage, long inclined shafts are often installed in the middle of the tunnel body. The tectonic movement in the western mountainous area is strong, the rock mass fragmentation is serious, the water storage bedrock fissures in the tunnel area are developed and irregular, and the depth of the bottom of the long inclined shaft is relatively large, resulting in a large amount of water, high water pressure, and unstable groundwater in the shaft work area of ​​the railway tunnel. regular features. ...

AI Technical Summary

Problems solved by technology

Due to the large amount of groundwater gushing out of deep tunnels, especially for water inrush, graded pumping and drainage will expose the problems of insufficient water in the distributed water storage and difficulties in implementing emergency pumping and drainage, resulting in a greater risk of water inrush and flooding of wells. In addition, graded pumping For pumping and drainage, a large number of pumping and drainage equipment will be installed in the water tanks at all levels, and the daily equipment maintenance workload is also relatively large

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