Existing tunnel safety protection multifunctional rack for in-situ expansion tunnel construction

Abstract

The invention provides an existing tunnel safety protection multifunctional rack for in-situ expansion tunnel construction. The existing tunnel safety protection multifunctional rack comprises a firstbracket and a second bracket horizontally connected to one side of the upper end face of the first bracket; the first bracket comprises a plurality of first transverse rods and a plurality of vertical rods connected to the bottom faces of the ends of the first transverse rods; the second bracket comprises a plurality of second transverse rods for being connected with the first bracket, and a plurality of inclined rods connected to the middles of the second transverse rods and used for supporting a tunnel arch wall; and the ends, close to the tunnel arch wall, of the first transverse rods andthe second transverse rods are provided with telescopic rods. During tunnel construction, horizontal support can be provided, the stability of the rack is improved, deformation of surrounding rock canbe controlled, and the construction safety is guaranteed; and the top face of the rack is formed by steel plates which are laid, protective nets are arranged on the periphery of the rack, the top face of the rack is provided with a movable slag discharging opening, the flexibility of the movable slag discharging opening is fully utilized, thus the slag discharging efficiency is effectively improved, the construction efficiency is improved, the construction period is shortened, and economic benefits are obvious.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to an existing tunnel safety protection multi-function stand for in-situ expansion tunnel construction. Background technique [0002] At present, China has become the country with the largest number of tunnels, the most complicated situation and the fastest development in the world. In some densely populated large and medium-sized cities or on expressways with huge traffic volume, the transport capacity of tunnels has become a bottleneck restricting traffic. In the face of increasingly severe transportation problems, the reconstruction and expansion of existing tunnels to meet the needs of transportation has become an inevitable choice for infrastructure construction in some places. At present, there are few researches in the field of tunnel reconstruction and expansion at home and abroad, and the research on its auxiliary equipment is also relatively lacking. The plat...

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Problems solved by technology

The platform used in the current tunnel construction has a single function and low construction efficiency, and is not suitable for the expansion and excavation of in-situ tunnels, and the platform of the existing structure cannot protect the existing tunnel that has been excavated during the construction process. , the safety of the construction at the bottom of the platform cannot be guaranteed during the excavation process, and it is not suitable for long-term development and use

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