Road tunnel double-lane single-width main tunnel and single-lane rescue channel combined tunneling method

Abstract

The invention discloses a road tunnel double-lane single-width main tunnel and single-lane rescue channel combined tunneling method. A double-lane single-width main tunnel is constructed according to a three-step method; all vehicle passages and pedestrian passages are synchronously constructed, and when the pedestrian passages are constructed, the pedestrian passages are widened according to the cross section sizes of the vehicle passages to serve as vehicle transverse holes; dividing the single-lane rescue channel into section tunnels by taking a traffic channel and a traffic transverse hole as boundaries; synchronously excavating by taking the two ends of each tunnel section as tunnel faces; the two tunnel faces corresponding to the same driving channel and the driving transverse hole share the second lining trolley; loading slag by adopting a slag raking machine, and transporting the slag to the outside of the hole by matching with a small-sized agricultural dumper; the two tunnel faces corresponding to the same traffic channel or traffic transverse hole share the second lining trolley, the crawler loader and the small agricultural dump truck to work alternately between the two tunnel faces; the construction efficiency is improved, the construction cost is reduced, the construction period is shortened, and the construction safety is ensured.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a combined excavation method for a double-lane single-width positive hole and a single-lane rescue channel of a highway tunnel. Background technique [0002] At present, the domestic tunnel projects are mainly based on the four-lane double-hole separated type and the large-section integral type. Restricted by topographical conditions and planning layout, the tunnel cannot be a double-hole separated type or a large-section integral type. Only a two-lane single-width front tunnel can be used, and a small-section rescue channel is used as an auxiliary tunnel. The structural form of this two-lane single-width positive hole combined with a single-lane rescue channel has the main problems: the single-lane rescue channel is "small" and "long"; "small" is limited by the section size and cannot be used in construction. High-efficiency large-scale mechanical equipm...

AI Technical Summary

Problems solved by technology

The main problem of the structure of this two-lane single-width main tunnel combined with a single-lane rescue channel is that the single-lane rescue channel is "small" and "long"; "small" is limited by the size of the section and cannot be used in construction High-efficiency large-scale mechanical equipment has high investment costs and requires a long construction period and high construction costs; "long" is limited by distance, which brings a series of difficulties such as ventilation and slag discharge, which brings huge challenges to design and construction. challenge

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