Variable-diameter ordinary pressure tool changing cutter and shield tunneling machine using the same

Abstract

The invention provides a variable-diameter ordinary pressure tool changing cutter and a shield tunneling machine using the same. the variable-diameter ordinary pressure tool changing cutter and the shield tunneling machine using the same can not only adapt to the complex geological conditions safely and reliably, but also the excavation diameter of the cutter can be adjusted according to the construction needs, and the use ratio of an opposite side hob is high. The variable-diameter ordinary pressure tool changing cutter comprises a cutter, primary beams, and secondary beams; the primary beamsand the secondary beams are arranged on the cutter in a alternate mode; the edges of the front faces of the secondary beams are provided with welding seats; the lower portions of the welding seats are provided with upper sealing seats; the lower portions of the upper sealing seats are internally provided with tool changing support barrels; the outer sides of the upper sealing seats are provided with gate oil cylinders; the gate oil cylinder is connected with gate plates; the tool changing support barrels are internally provided with tool barrels; the top portions of the inner walls of the tool barrels are provided with tool seats; and the tool seats are internally provided with side hobs. The variable diameter of the variable-diameter ordinary pressure tool changing cutter can be realized, and the diameter of the cutter head can be enlarged and reduced quickly, conveniently and safely.

Description

technical field [0001] The invention relates to the technical field of tunnel boring machines, in particular to a variable-diameter, normal-pressure tool-changing cutter head and a shield machine using the cutter head. Background technique [0002] At present, with the acceleration of the development of underground space, more and more tunnels are being built across rivers and seas. The formations traversed by such tunnels are characterized by high-pressure water, and some formations are more complex, such as the top is soft and the bottom is hard, and a section of soft A section of complex stratum such as hard and densely cemented pebble soil requires the shield machine cutter head to have high safety and adaptability at the same time. Some tunnels are curved, so the tunneling direction of the shield machine must be deflected with a small radius of curvature, which usually requires increasing the excavation diameter of the cutter head or making the cutter head swing. In so...

AI Technical Summary

Problems solved by technology

In soft rock formations, the overbreak of the cutter head will roughly increase the amount of grouting used to fill the gap between the segment and the rock and soil, and increase the construction cost. The construction party hopes that the overbreak of the shield cutter head can be adjusted; , after the side hob wears out, the excavation diameter of the cutter head decreases. If the new side hob is not replaced in time, it is easy to get stuck in the stratum where the surrounding rock converges. In the highly abrasive stratum, the shield tunneling needs to be replaced after a short distance new side hob

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