Method for constructing tunnel by utilizing shield empty-pushing crossing mine method

Abstract

The invention discloses a method for constructing a tunnel by utilizing a shield empty-pushing crossing mine method. Gravels are paved in advance on an empty-pushing section, thereby being short in construction period; the gravels are stacked and filled in front of a cutter, a counter force is provided when the shield is in a tunneling process, and duct pieces are not fixed by structural steel; most clearances between the duct pieces and rock are filled with the gravels, thereby reducing work load and promoting tunneling efficiency; enough counter force is supplied by a jack for splicing the duct pieces, a water-stopping bar is excellently pasted and a waterproof effect is excellent; the duct pieces can be filled and compacted in time, the duct pieces after being spliced cannot float upward, and damaged and over-loaded staggered slabs do not exist; the grout amount on the back of the duct pieces is reduced and the construction cost is saved; and the tunneling efficiency is greatly promoted, the production value within a unit time is high and the economic benefit is excellent.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a tunnel construction method of shield tunneling through a mine method. Background technique [0002] In order to ensure the smooth advancement of the shield tunnel, the mining method is used to excavate the extremely hard rock tunnel first, and then the shield tunnel pushes the assembled segments through, commonly known as the shield tunnel push. : After the first ring is advanced, stop the excavation and weld in front of the cutter head to provide support for the reaction force. After the segment is assembled, pass the front of the cutter head to the pea gravel behind the segment, and at the same time inject grout into the back of the segment through the lifting hole of the segment , before the next ring advances, the segments are connected by multiple steel sections to ensure that the segment water-stop strips are closely attached. The characteristics of this cons...

AI Technical Summary

Problems solved by technology

The characteristics of this construction method, in terms of construction progress: due to the large workload of spraying pea gravel in front of the cutter head and pulling the segment in the hole, it requires more manpower, the construction cycle is long, and the construction progress is slow; in terms of construction quality Aspects: Since there is no object providing counterforce in front of the cutter head during the propulsion process of the shield, the segments are easy to loosen, causing the segments to be easily misplaced and damaged, and the waterproof effect is not good; in terms of benefits: the construction is slow, and the manpower invested There are also many, the amount of synchronous grouting is large, and the construction cost is high

At present, the network of subways is accelerating, the buried depth of tunnels will also continue to increase, and the length of empty-pushed tunnels will also continue to increase. The construction period is relatively tight. Traditional construction methods can no longer meet the construction of long-distance empty-pushed tunnels in mine sections of subway shields in my country. need