Tunnel Excavation Method Based on Silent Breaker

Abstract

The invention provides a tunnel cutting method based on a soundless cracking agent, which realizes zero vibration and zero noise during tunnel cutting. The tunnel cutting method is characterized in that the method comprises the following steps: step 1, cyclical footage is determined according to the section size of a tunnel, and a bull hole is drilled in a designed cutting place; step 2, a bottomenlarging drill is used for expanding excavation in the bull hole, so as to form a plurality of column cavities which are arrayed in the axial direction and arranged at intervals, and a sealer is usedfor sealing the mouth of the bull hole and leaving only a passage which allows a grouting pipe to come in and out; step 3, the soundless cracking agent is mixed with water, so as to make packing slurry; step 4, a grouting device is utilized for pouring the slurry into the column cavities and the bull hole in the sequence from hole bottom to hole mouth, and a rock is broken and extruded out of thepreset cutting part of the adjacent tunnel face due to the huge pressure caused by the expansion of the packing slurry; and step 5, a hand drill is utilized to drill a hole in the broken rock and a self-anchored rock bolt is inserted in the hole and pulled by utilizing a loader, so as to pull out the broken rock and form a groove-shaped hollow cavity, thereby finishing the cyclical footage cutting construction.

Description

technical field [0001] The invention belongs to the technical field of tunnel excavation construction methods, and in particular relates to a tunnel excavation method based on a soundless breaker. [0002] technical background [0003] With the development of society and economy, problems such as traffic congestion and shortage of urban construction land have become increasingly prominent. As an important means to solve traffic congestion and improve the utilization rate of land resources, underground space development has attracted more and more attention. At present, the most economical method in rock mass tunnel excavation is the blasting method. The blasting excavation of the tunnel section mainly includes the excavation of cut holes, caving holes and surrounding holes. Among them, in order to increase the free surface and improve the blasting effect, it is necessary to excavate the cut holes in advance when excavating the tunnel. , due to the small number of empty surfa...

AI Technical Summary

Problems solved by technology

This method aims to excavate tunnels by using static crushing method. Although the vibration and noise caused by blasting can be eliminated, compared with the blasting method, it is greatly affected by the nature of the rock, the construction period is longer, the cost is higher, and the construction is relatively difficult. complex

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