Construction method of pervious rib type arch beam tunnel

A technique for tunnel construction and transparent ribs, which is applied in the construction of transparent ribbed arch beam tunnels and the field of construction of transparent ribbed arch beam tunnels. To achieve the effect of convenient construction, improving strength and stability

Active Publication Date: 2008-12-17
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI +1
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AI Technical Summary

Problems solved by technology

Since the transparent ribbed arch-beam tunnel is mainly suitable for the mountainous area with a sloping surface, the covering layer is thin, the surrounding rock type is low, and the bias effect is obvious. Safety accidents such as roof fall and landslides are prone to occur during the excavation process.

Method used

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  • Construction method of pervious rib type arch beam tunnel

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Embodiment Construction

[0028] The present invention will be described in further detail below according to accompanying drawing:

[0029] according to figure 1 , the construction method and steps of the transparent ribbed arch beam tunnel are as follows:

[0030]A. Reinforcement of horizontal tube sheds on the vaulted hillside: Before excavation of the tunnel, 5 or 6 rows of horizontal tube sheds are arranged on the slope of the vaulted roof along the line, with a spacing of 2m×2m, arranged in a plum blossom shape, and each tube shed is Drill horizontally at an angle of 0° or 5° or 10° or 15° or 20° or 25°, the axis of the drilling hole is perpendicular to the direction of the line, and the pipe shed has an outer diameter of 108mm or 138mm and a wall thickness of 6mm or 8mm. Hot-rolled seamless steel pipe with a length of 15m or 18m or 20m. Two rows of grouting holes with a diameter of 20mm are drilled around the pipe wall. After the steel pipe is driven into the surrounding rock, a steel cage is i...

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Abstract

The invention discloses a through rib-typed arched girder tunnel construction method, comprising the steps as follows: before the excavation of the tunnel, the arch slope is reinforced by transverse pipe roof; the shaft excavation is carried out by a type of stepped excavation and reserving rock arch; after the wall rock deformation is basically stable, the internal side arch secondary lining, arch ground beam, the rock fall-proof retaining block, the rib-typed arched girder and the anti-collision wall are wholly constructed; the metering of each construction circulation excavation is 10-12m and the whole construction length is 6-8m. The invention is a set of whole construction method for the through rib-typed arched girder tunnel; the construction sequence and the supporting system are adaptable for the characteristics of the through rib-typed arched girder tunnel such as shallow burying, eccentric pressing and space forcing, effectively ensures the construction process safety and the stability of the tunnel structure, and provides a practically operatable construction technique for the generalization and application of the novel environmental-protective tunnel, namely, through rib-typed arched girder tunnel.

Description

technical field [0001] The invention relates to the field of tunnel engineering, and more specifically relates to a construction method for a transparent ribbed arch beam tunnel, which is suitable for the construction of a transparent ribbed arch beam tunnel. Background technique [0002] China is a mountainous area with a vast territory and complex topography. In the process of rapid advancement of traffic engineering construction in mountainous areas in China, mountain roads built along river valleys and valleys account for a considerable proportion. For road design schemes in mountainous areas, shallow-buried mountainside tunnels are often used instead of traditional deep-digging road cutting schemes to reduce damage to mountain vegetation and avoid safety hazards caused by high-cut slopes. As a typical unbiased tunnel, the shallow-buried tunnel near the mountain bears significant asymmetric loads. In design, tall retaining structures such as protective arches and retaini...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/045E02D17/20
CPCY02A10/23
Inventor 陈善雄陈修和余飞张胜王飞
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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