Observation window device applied on shield machine

Abstract

The invention relates to an observation window device arranged on a tunnel boring machine (TBM). The outline of the observation window is a disc; the observation window successively comprises a glass cover, lenses, a blank cap and a safety plug from front to back, and the periphery thereof comprises a base board flange, a positioning flange, a supported flange, a sheath and a strengthening ring. The base board flange is a hollow flange ring and is in combined welding with a cabin door by using the cabin door as a base; the glass cover, lenses, the blank cap, the safety plug, the positioning flange and the supported flange are coaxially installed and fixed by screws; and all joints are sealed by rubber gaskets and the like. The device applied on a shield machine is special equipment established for observing the state of the structure of the soil body in a soil chamber before builders need to enter the soil chamber to manually remove barriers and replace tools, and judges whether opening the door and entering the chamber is safe or not according to the observed soil body in the soil chamber so as to prevent disasters for the operating personnel entering the chamber and the whole construction site caused by collapse, onrush water, onrush sand and the like of an excavation face. The device has simple structure and easy use.

Description

technical field [0001] The invention relates to an observation device on a tunnel boring machine, in particular to an observation device on a shield machine that adopts air pressure method during construction in a water-saturated soft stratum with a high underground water level. Background technique [0002] The shield machine, the full name of the shield tunneling machine, is a special construction machine for tunnel excavation and has a high degree of automation, saves manpower, fast construction speed and one-time hole formation, in tunnels with long holes and deep buried tunnels. Under certain circumstances, it is more economical and reasonable to use a shield machine for construction. When the shield machine is constructed in a water-saturated weak stratum with a high groundwater level, it is difficult to keep the excavation surface stable, which may cause serious subsidence of the ground surface and affect the safety of buildings on the ground, as well as when passing ...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, there are the following deficiencies in the shield excavation using the air pressure method: due to the complex underground soil layer during the excavation process of the shield tunnel, sometimes it will encounter ancient wood stumps, building concrete blocks, bridge building foundation steel bars, etc. buried in the ground, so that If the shield machine does not discharge soil smoothly and the cutter is damaged, construction personnel need to enter the soil cabin to manually remove obstacles and replace the cutter. Since there is a cutter head with an open slot between the soil cabin and the excavation surface, the excavation surface Collapse, water gushing, sand gushing, etc. will cause great danger to the operation in the cabin, and the soil cabin is sealed and isolated from the soil discharge equipment system, driving equipment device, and construction operation space at the rear of the shield machine. , so when it is unknown whether the excavation surface is collapsing, the hatch door is generally opened slowly and closed in time if gushing is found. This method is time-consuming, laborious and has low reliability. In the process of emergency shutdown, the gushing phenomenon will occur from time to time, which will endanger the safety of construction personnel and shield equipment.

The electronic device for monitoring the slag discharge status involved in this patent can only solve the problem of visual blind spots in the earth pressure sealed cabin, and is not enough to judge whether the construction personnel can safely enter the cabin and provide absolute safety guarantee.

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