Prefabricated lining for tunnel reinforcement and installation method thereof

Abstract

The invention relates to a prefabricated lining for tunnel reinforcement and an installation method thereof. The prefabricated lining is installed on the inner side of an original lining of a tunnel and comprises a left prefabricated lining body and a right prefabricated lining body, wherein the section of the left prefabricated lining body and the section of the right prefabricated lining body are both arc; the left prefabricated lining body and the right prefabricated lining body are symmetrical about the central axis of the tunnel and are in butt joint at the top of the tunnel; a grouting layer is arranged between the prefabricated lining and the original lining of the tunnel; the left prefabricated lining body and the right prefabricated lining body are each composed of a plurality ofsub-linings with the same width; the sub-linings are arranged in the extending direction of the tunnel and connected with one another; the butt joint position of the left prefabricated lining body andthe right prefabricated lining body is in tooth-shaped connector type butt joint; tooth-shaped connectors are each of a trapezoidal structure and positioned in the middles of the tops of the sub-linings; each tooth-shaped connector is axially provided with a bolt hole, and the tooth-shaped connectors are connected through bolts; and the thickness H of the prefabricated lining is delta Dmin-T. Inthe construction process, only corresponding lanes need to be closed, and normal passing of the other lanes is not affected. The installation process is rapid, easy and convenient, concrete pouring orspraying is not needed, grooving in an original structure is not needed, the difficulty of reinforcement construction can be greatly lowered, and the time of reinforcement construction can be greatlyshortened.

Description

technical field [0001] The invention relates to the field of tunnel reinforcement and repair construction, in particular to a prefabricated lining for tunnel reinforcement and an installation method thereof. Background technique [0002] In the field of tunnel reinforcement and repair construction, the existing tunnel reinforcement technology mainly uses ribbed steel bars, anchor rods, steel mesh, and shotcrete to form a "circular reinforcement structure" to reinforce the cracked lining. The basic steps are as follows: [0003] 1) Close the tunnel and clean up the decorative layer, oil stains and floating dust impurities on the lining surface; [0004] 2) Judgment of headroom: According to the measurement data and limit size of the headroom section, for the part with insufficient headroom, the lining shall be properly chiseled to ensure that the sprayed concrete does not invade the limit after covering; [0005] 3) Construction of bolts: according to the design spacing, set...

AI Technical Summary

Problems solved by technology

[0015] The main disadvantages of the above-mentioned construction methods are: during the construction process, the tunnel must be closed to block the passage of vehicles, the construction steps are cumbersome and the cycle is long, which seriously affects the normal operation of the tunnel

During the construction process, whether it is the process of slotting or the process of pouring and curing concrete, it takes a long time, resulting in a long construction period and long-term impact on traffic

After installing the steel arch, it is necessary to fill the grid formed by the arch with shotcrete, which further increases the difficulty and time of construction

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