Method of Backfilling Reservoir Diversion Tunnel to Reconstruct Flood Tunnel
A technology of diversion tunnel and flood discharge tunnel, which is applied in construction, water conservancy engineering, marine engineering and other directions, can solve the problems of large investment impact, long construction period and high construction technical requirements, achieve economical and easy construction period, reduce construction difficulty and cost, The effect of shortening the construction period
Active Publication Date: 2016-03-16
YELLOW RIVER ENG CONSULTING
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Problems solved by technology
At present, in the reconstruction, the first tunnel of the diversion tunnel (commonly known as "dragon head") is usually excavated and the entrance is rearranged, so there is a certain degree of construction difficulty, especially for small and medium-sized reservoirs. The elevation difference at the entrance of the flow tunnel is small, and the traditional excavation method has a long construction period, a large investment impact and high construction technology requirements
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[0008] refer to figure 1 As shown, the method for backfilling and rebuilding the diversion tunnel of the reservoir according to the present invention, during the construction period of the reservoir, the diversion tunnel and the inlet tower 1 of the flood discharge tunnel are combined and arranged in place for diversion during the construction period of the reservoir Channel; the first tunnel section 2 of the diversion tunnel is excavated once to meet the hole height of the flood discharge tunnel after reconstruction; after the construction of the reservoir is completed, put it into the maintenance door slot 3 of the inlet tower 1 Blocking the gate 4, the top elevation of the blocking gate 4 is equal to the elevation of the inlet floor of the spillway tunnel, and then backfilling concrete in the area between the blocking gate 4 and the tunnel section 2 at the head of the diversion tunnel, the diversion tunnel The function of flood discharge can be played by rebuilding it into ...
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The invention discloses a method for rebuilding a diversion tunnel of a reservoir to form a flood discharging tunnel in a backfilling mode. The method comprises the steps that when the diversion tunnel is built, an entrance tower and a diversion tunnel head portion tunnel section are respectively built in place according to the design requirements, and serve as diversion channels in the reservoir construction period; after reservoir construction is accomplished, a blocking gate is placed into an access door groove of the entrance tower, wherein the crest elevation of the blocking gate is equal to the floor elevation of an entrance of the flood discharging tunnel; concrete backfilling is carried out on the area between the blocking gate and the diversion tunnel head portion tunnel section according to the designed flood discharging tunnel requirements, and the diversion tunnel is rebuilt to form the flood discharging tunnel. The method for rebuilding the diversion tunnel of the reservoir to form the flood discharging tunnel in the backfilling mode has the advantages that compared with a traditional mode for rebuilding a diversion tunnel to form a flood discharging tunnel, secondary excavation of the flood discharging tunnel is avoided, construction difficulty and the construction cost are reduced, the method is economical and easy to implement, the construction period is shortened, and the method is particularly suitable for the situation that the difference between the elevation of entrances of flood discharging tunnels of small and medium-sized reservoir and the elevation of entrances of diversion tunnels is small.
Description
technical field [0001] The invention relates to a method for constructing a flood discharge tunnel of a small and medium-sized reservoir, in particular to a method for backfilling and reconstructing a flood discharge tunnel in a reservoir diversion tunnel. Background technique [0002] In the process of reservoir construction, diversion tunnels of temporary buildings during the construction period are often converted into permanent flood tunnels to achieve the purpose of reducing investment. At present, in the reconstruction, the first tunnel of the diversion tunnel (commonly known as "dragon head") is usually excavated and the entrance is rearranged, so there is a certain degree of construction difficulty, especially for small and medium-sized reservoirs. The elevation difference at the entrance of the flow tunnel is small, and the traditional excavation method has a long construction period, a great investment impact and high construction technology requirements. Content...
Claims
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IPC IPC(8): E02B8/06
Inventor 韩秋茸曹国利李鑫刘佳郑宇邢建营
Owner YELLOW RIVER ENG CONSULTING