Composite grouting stop mechanism and shield tunnel boring machine with same

Abstract

The invention provides a composite type stopper mechanism, including a composite stopper, the composite stopper includes an upper stopper and a lower stopper arranged parallel to each other, and the upper stopper and the bottom stopper A wear-resistant rubber layer is arranged between the pulp plates. The setting of the composite type stopper increases the wear resistance; when the upper stopper is worn, the wear-resistant rubber layer compensates the worn part of the upper stopper under the action of elasticity. The present invention also proposes a shield tunnel boring machine, comprising the composite slurry stop mechanism described in any one of claims 1-5. When the shield machine advances forward, the gap between the rock wall and the shield tail is synchronously grouted, and the composite grout-stop plate extends backward due to the force to form a closed space to enhance the airtightness of the grouting environment; prevent the grout from pouring back into the front of the shield Affect the construction, reduce the waste of grout, ensure the quality of segment installation, and improve work efficiency.

Description

technical field [0001] The invention relates to the technical field of shield machines, in particular to a composite slurry stop mechanism and a shield tunnel boring machine with the slurry stop mechanism. Background technique [0002] Shield tunnel boring machine, referred to as shield machine, is a special construction machine for tunnel boring. When the shield machine is working, under the action of the thrust of the propulsion cylinder, the grouting of one ring segment is completed at the same time, and then the excavation is stopped, and the segment assembly machine completes the assembly of the next ring segment. [0003] The post-grouting of the segment arm of the shield machine can be divided into synchronous grouting, secondary reinforcement grouting and water plugging grouting according to the time of advancing the shield and the purpose of grouting. [0004] When the synchronous grouting method is adopted, that is, the synchronous grouting is through the synchron...

AI Technical Summary

Problems solved by technology

However, after the shield machine excavates for a period of time during use, the slurry plate will be gradually damaged due to the friction between the shield body and the soil

As a result, the grout stop plate gradually loses its airtightness, and the grout will flow to the soil bin, making it difficult to build up the grouting pressure

Because the grouting pressure cannot be established at the top of the segment, it is difficult to fill the top of the segment with grout, and the grout will flow into the soil bin along the damaged grout stop plate, thereby affecting the filling of the grout. The increase in settlement is not conducive to the waterproofing of the tunnel lining, and the damage to the slurry plate will also reduce the supporting force behind the lining of the segment, causing displacement and deformation of the segment

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