Asymmetric excavation construction organization method for super-large-section double-multi-arch tunnel

Abstract

The invention discloses an asymmetric excavation construction organization method for a super-large-section double-multi-arch tunnel. The asymmetric excavation construction organization method comprises the following sixteen steps that hole entering and exiting of the double-multi-arch tunnel is conducted through transverse and longitudinal channels, and the cooperative construction of the transverse channel and the hole entering of the tunnel is maintained; a first hole is maintained to be excavated in advance to serve as a geological pilot hole and a main transportation channel; and the multi-point synchronous construction is realized by excavating the pilot hole in advance, additionally opening the transverse channel and simultaneously working at a plurality of working surfaces. According to the construction progress of a second transverse channel, hole entering of the double-multi-arch tunnel can be conducted synchronously; a horizontal transportation channel is provided by maintaining advanced excavation of the first hole; by additionally arranging a 3-1 transverse channel, a 3-2 transverse channel and a fourth transverse channel, multi-point synchronous construction is achieved, the construction period is shortened, and the construction flexibility is improved; a third hole and a fourth hole are synchronously excavated on the premise of keeping a certain step pitch, so that the structural stability is ensured; and the fourth hole in a left-line tunnel is maintained to be excavated in advance, and the influence of blasting excavation of the left-line tunnel on a constructed lining structure of a right-line tunnel is reduced.

Description

Technical field [0001] The present invention relates to the field of tunnel engineering, and more particularly to a supermapped dual-arched tunnel asymmetric excavation construction tissue method. Background technique [0002] With the booming of my country's transportation, the scale of road tunnels is continuously expanded. The geological or terrain conditions facing the tunnel construction, and the construction environment is increasingly complex, and is limited by the line connection, the overall route, engineering cost, etc. Traditional separation tunnels often cannot meet construction requirements. The inner arch tunnel is a new type of large span tunnel structure with the rapid development of the highway tunnel. Its linear natural and smooth, high space utilization, small area, while reducing the number of projects, adaptation line conditions, and environmental protection It has the advantages of alternative, and has been widely used in many trunk road tunnels in recent ye...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an asymmetrical excavation construction organization method for a super-large cross-section double-arch tunnel, which solves how to expand the entrance and exit holes of the double-arch tunnel under the condition that the tunnel cannot be entered from the front; How to expand multiple working faces to achieve multi-point simultaneous construction; how to ensure smooth transportation of materials and muck under the condition of simultaneous construction of multiple working faces

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