Water shield arrival receiving structure and receiving method

Abstract

The invention belongs to the field of shield tunnels, and discloses a water shield arrival receiving structure and a receiving method. The water shield arrival receiving structure comprises a shield starting well, a shield tunnel design use section, a shield tunnel temporary climbing section and a temporary operation platform. The receiving method comprises the following steps of (1) enabling a shield to start from the shield starting well; after the shield passes through the shield tunnel design use section, reaching the terminal of the shield tunnel design use section; (2) after the shield reaches the terminal of the shield tunnel design use section, enabling the shield to upwards tunnel along the shield tunnel temporary climbing section until to the temporary operation platform; (3) after the shield reaches the temporary operation platform, disassembling, transporting, and completing the shield receiving process; (4) arranging a transverse blocking wall at the shield tunnel design terminal, disassembling or backfilling the temporary operation platform and the tunnel temporary climbing section. The shield tunnel design use section and receiving method have the advantages that the temporary operation platform is filled and built at the water area in front of the terminal of the shield tunnel design use section, and the shield receiving process is completed on the temporary operation platform; the safety is realized in the water shield receiving process, and the efficiency is high.

Description

technical field [0001] The invention belongs to the field of shield tunnels, and more specifically relates to an underwater shield machine arrival receiving structure. Background technique [0002] With the development of thermal power plants and nuclear power plants, more and more water intake and drainage tunnels need to be built. Most of these water intake and drainage tunnels are located below the water surface at one end, connected to the water body through a vertical water intake or outfall, and the other end is located on the bank where water is used. [0003] refer to figure 1 , The construction of this kind of water intake and drainage tunnels starts from the working well on the bank slope and excavates into the water. After the shield machine reaches the design position, it generally adopts the scheme of dismantling in the cave or setting up a receiving working well in the water and lifting it out. The following problems exist when the water intake (drainage) shi...

AI Technical Summary

Problems solved by technology

[0004] 1) When adopting the scheme of dismantling the shield in the tunnel, the shield machine needs to be dismantled into parts and transported out of the tunnel, and the cutter head, front shield and shield shell remain permanently at the bottom of the water, the residual value of the shield machine is low, and the removal (row) Water tunnels are generally not very long, resulting in high equipment amortization costs for such tunnels;

[0005] 2) When the shield tunnel dismantling scheme is adopted, the work efficiency of the tunnel dismantling machine is low, the dismantling time is long, and the shield dismantling work cannot be carried out in parallel with other processes in the tunnel, resulting in a long total construction period;

[0006] 3), adopt the scheme of setting receiving work well in water (refer to figure 2 ), it is necessary to ensure that there is no water in the well. The construction of the receiving work well in water is difficult and the project cost is high;

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