Construction method for controlling the breakage of segmental misalignment

Abstract

The invention relates to a construction method for controlling the staggered damage of segments, comprising the steps of: assembling segment segments in a tunnel formed by the shield tunneling machine during the construction and excavation process of the shield tunneling machine; When the No. 1 trolley needs to enter the assembled segment in the tunnel, lay a track on the corresponding segment, and extend the front end of the track to the shield tail of the shield machine, so as to use the laid track Transfer the load of the equipment bridge and the No. 1 trolley to the corresponding segment, so as to avoid the phenomenon that the segment is damaged due to misplacement. The construction method of the invention extends the track under the No. 1 trolley forward to the shield tail of the shield machine, disperses the pressure acting on the segment under the No. 1 trolley, and transfers the load of the No. 1 trolley and the equipment bridge. Apply force to all segments from the No. 1 trolley to the shield tail, and all segments in this area will be stressed together, so as to avoid the misplacement of segments and reduce the phenomenon of segment breakage.

Description

technical field [0001] The invention relates to the field of shield construction engineering, in particular to a construction method for controlling the damage of segmental misalignment. Background technique [0002] In the process of shield tunneling, there is a building gap between the excavation diameter of the cutter head and the outer diameter of the segment. This building gap needs to be filled with synchronous grouting slurry mortar in time to avoid ground subsidence. The synchronous grouting slurry is made of cement, bentonite, fly ash, medium sand and water according to a certain test mix ratio. The initial setting time of the slurry is generally controlled within 4 to 6 hours. Adding water and other reasons often causes the initial setting time of the mortar to be uncontrollable, and the non-solidified mortar floats under the action of the mortar buoyancy. [0003] like figure 1 As shown in the figure, a cross-sectional view of the existing shield machine during ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the prior art, provide a construction method for controlling segment misalignment and damage, and solve the problem of segment misalignment and damage in the prior art due to concentrated force, that is, eccentric pressure.

Images