Shield machine starting device with adjustable seal

Abstract

The invention discloses a shield machine starting device with an adjustable seal. The shield machine starting device comprises a tube body arranged on a bottom frame, wherein a starting well embedded steel plate connecting plate is arranged on the bottom frame, the front end of the tube body is provided with a hole door connecting flange, a shield machine support device is arranged on the inner surface of the tube body, a negative ring pipe sheet is in lap joint at the tail part of the tube body, and the lap joint part of the tube body and the negative ring pipe sheet is provided with a rubber sealing device. The shield machine starting device has the advantages that the tube body and the negative ring pipe sheet can form a sealed cavity with a hole door and a shield body, when a hole door seal is damaged, the outward leakage of the digging surface pressure can be effectively prevented, and the occurrence of slurry leakage, spraying and collapse can be prevented. Meanwhile, when much water overflows from the digging surface or the pressure is too high, the sealing capability of the rubber seal can also be enhanced through tightly screwing a sealing compression screw bolt, the collapse caused when the shield machine runs into a reinforcing region can be avoided, and the construction risk and the construction cost are greatly reduced.

Description

technical field [0001] The invention relates to a shield construction equipment, in particular to a shield machine starting device equipped with an adjustable seal. Background technique [0002] At present, shield method construction has been very common in China. The most difficult stage to control in the construction of the shield method is the launch and reception. The traditional starting process is to first reinforce the end of the portal, install the portal seal at the portal, then chisel the portal, the shield machine enters the reinforcement area, and block the shield through the contact of the portal seal with the shield body and segments. The soil pressure on the excavation surface of the mechanism controls the settlement of the ground surface. However, in actual application, when the shield machine enters the portal, the seal of the portal is often damaged, resulting in slurry leakage. If it is in the formation with high water pressure or quicksand formation, t...

AI Technical Summary

Problems solved by technology

However, in practical applications, when the shield machine enters the portal, it often breaks the seal of the portal, resulting in slurry leakage

If it is in the formation with high water pressure or quicksand formation, the fixing effect of the end reinforcement on the soil is not ideal. When the shield machine enters the reinforcement area, a large amount of water gushing and gushing are likely to occur, resulting in collapse.

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