Shed-tunnel combined novel support structure and construction method

Abstract

The invention provides a shed-tunnel combined novel support structure and a construction method. The shed-tunnel combined novel support structure comprises a shed-tunnel support unit and a rockfall buffer unit; the shed-tunnel support unit comprises a plurality of supporting units and a shed-tunnel longitudinal beam, and each supporting unit comprises a vertical supporting column A, a vertical supporting column B and a horizontal beam; and the rockfall buffer unit comprises a shed-tunnel roof cover plate and a buffer backfill layer. By adopting the scheme, excavation is directly carried out onthe side face of a steep hillslope, the range of the width of a newly-built highway subgrade or the width of a widened highway section is greatly increased, and the adaptability is higher during construction at a steep slope bedrock highway section with high slope stability; and besides, environmental damage can be reduced, the construction cost can be reduced, the construction period can be shortened, and the construction difficulty is reduced.

Description

technical field [0001] The invention relates to the technical field of highway engineering, in particular to a novel supporting structure and construction method combining shed and tunnel. Background technique [0002] In highway engineering, some low-grade or other-level highways are built on steep hillsides due to the impact of terrain conditions and project investment, and the roadbed is narrow and the alignment is poor. It has the lowest traffic capacity, poor comfort and traffic capacity. With the development of economy and society, these poor roadbeds need to be widened and reconstructed, and the original roadbed needs to be excavated and widened to the inner side of the slope. In addition, due to the above reasons, when it is necessary to build a new roadbed on a steep hillside, it is also necessary to excavate to the inner side of the slope. However, since the terrain where the roadbed is located is steep or very steep, it is necessary to carry out a large number o...

AI Technical Summary

Problems solved by technology

However, since the terrain where the roadbed is located is steep or very steep, it is necessary to carry out a large number of developments on the slope to ensure that the slope has good stability, or that the slope will not pose a safety threat to vehicles and pedestrians in normal operation in the later period. Excavation or protection, especially at very steep slopes, the existing technology for excavation and protection in such steep slopes, the cost and construction difficulty are high, and its technical and economical efficiency is relatively poor

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