Composite balancing earth-pressure shielding machine

Abstract

A composite earth pressure balance shield machine, comprising: a casing (1), a cutter head (2), a soil bin (3), a screw conveyor (4) and a propelling oil cylinder (6), characterized in that: the The cutter head is located at the front of the casing, and the cutter head is provided with a tearing knife (21) and a cutting knife (22) at the same time, and the blade of the cutting knife is slightly behind the tearing knife; the soil bin is located at the rear of the cutter head , and the back wall of the soil bin is provided with a grouting hole (32), an air pressure balance device (5) is installed at the rear of the soil bin, and an excavation port (31) is provided at the bottom of the soil bin; the lower entrance of the screw conveyor is connected to the soil bin. The excavation openings of the casings are connected; the propelling oil cylinders are evenly arranged along the inner wall of the casing. The shield machine can solve the normal excavation problem in the highly permeable gravel-sand soil layer or the egg (gravel) stone soil layer, or the normal excavation problem when it needs to pass through obstacles such as large stones over 30 cm.

Description

technical field [0001] The invention relates to a compound earth pressure balance shield machine, more specifically, a compound earth pressure balance shield machine suitable for high-permeability soil layers. Background technique [0002] For power plants built on riversides and seasides, circulating water intake is a very important project. In the past, open channels were basically used to extract water, but the construction is very difficult, especially for shallow water intake. Later, with the improvement of construction technology, construction techniques such as immersed pipe and pipe jacking were introduced, but there are still many disadvantages, especially the large-diameter water intake tunnel. [0003] With the introduction of the shield construction method, it has gradually replaced the previous construction technology. However, the geology of the circulating water intake tunnel of the Ninghai Power Plant Project is complex, with many soil layers and high water c...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a compound earth pressure balance shield machine to solve the problem of normal excavation in highly permeable gravel sand soil layer or egg (gravel) soil layer, or need to pass through more than 30 cm Normal excavation problems when there are obstacles such as large rocks

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