Rigid Frame Envelope Structure and Construction Method of Portal Pile Row for Highway Tunnel in Shallow Buried Mountainous Area

Abstract

The invention discloses a gate-type row pile rigid frame enclosure structure for a shallow buried mountain highway tunnel and a construction method thereof, relates to the field of shallow buried mountain highway tunnel cover and cut construction and provides a through-type cover and cut construction method for completing shallow buried mountain highway tunnel main body construction through the gate-type row pile rigid frame enclosure structure. The gate-type row pile rigid frame enclosure structure is mainly composed of two rows of drilling piles which are parallel to each other and arranged on the two sides of a highway tunnel main body correspondingly, top beams located at the tops of the two rows of drilling piles correspondingly and integrally connected with the two rows of drilling piles in a poured mode, a plurality of transverse supports connected between the top beams of the tops of the two rows in a poured mode and the like. The construction structure has the advantages of being simple in construction, safe and reliable, low in cost, excellent in construction condition, capable of achieving the low-carbon effect, environmentally friendly and the like and is beneficial to reducing the engineering quantity of excavated shallow buried mountain highway tunnel side slopes by combining the corresponding construction method, a spoil ground is saved, energy conservation and emission reduction effects are achieved, construction is environmentally friendly, and economic benefits and social benefits are remarkable.

Description

technical field [0001] The invention relates to the field of cover-excavation construction of highway tunnels in shallow buried mountainous areas, in particular to a transparent cover-excavation construction method for the rigid structure enclosure of portal-type pile arrangement for shallow-buried mountainous highway tunnels. Background technique [0002] The cover-excavation construction of highway tunnels in shallow buried mountainous areas is to excavate the ground down to a certain depth, then close the top, and the rest of the lower part of the construction is carried out under the closed top cover. Due to the excavation of tunnel earthwork under closed conditions, safeguard measures such as ventilation and smoke exhaust, lighting, and drainage of seepage water in the tunnel need to be taken during the construction period, which is costly and has potential safety hazards; and the published Chinese patent number is 201420739014.0 "Mountain Tunnel "Comprehensive support ...

AI Technical Summary

Problems solved by technology

Due to the excavation of tunnel earthwork under closed conditions, safeguard measures such as ventilation and smoke exhaust, lighting, and drainage of seepage water in the tunnel need to be taken during the construction period, which is costly and has potential safety hazards; and the published Chinese patent number is 201420739014.0 "Mountain Tunnel "Comprehensive support structure with pile arch cover excavation method", although two rows of parallel bored pile enclosure structures are used, but the combination of arch protection and bored piles into a comprehensive support structure still needs to be carried out under a closed roof. construction, so there are still defects in closed construction

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