A kind of tunnel bonding steel reinforcement method

Abstract

The invention relates to a method for reinforcing and reinforcing tunnel bonded steel, which comprises the following steps: circumferentially opening a circumferential groove along a vertical section of a lining surface; The first bolt hole; the fixed base is bonded in the anchoring groove, the center of the fixed base is provided with a second bolt hole, and the exhaust hose is provided at the bottom of the annular groove; the second bolt hole is provided on the strip-shaped steel plate, and the A grouting hole is set on the steel strip, and the length, width and thickness of the strip steel plate are equal to, less than and less than the length, width and depth of the annular groove; the strip steel plate is bonded in the annular groove, and the strip steel plate is Weld on both sides of the contact surface of the fixed base, implant anchor bolts from the third bolt hole on the strip steel plate, inject latex cement into the annular groove through the grouting hole, and exhaust through the exhaust hose to complete the tunnel lining reinforcement. Compared with the prior art, the present invention has the advantages of space saving, stable structure and the like.

Description

technical field [0001] The invention relates to a tunnel-bonded steel technology, in particular to a tunnel-bonded steel reinforcement and reinforcement method. Background technique [0002] With the development of transportation construction, the scale of tunnels in operation period continues to increase. With the continuous increase of tunnel operation years, due to improper construction or other reasons, the back of the secondary lining is vacated, and the terrain conditions, overloaded vehicle operation and other unfavorable conditions are affected. As a result, the secondary lining often suffers from cracking, spalling, block drop and other diseases. When these diseases are serious, they will threaten the driving safety of the tunnel and the durability of the supporting structure. [0003] The existing tunnel lining reinforcement methods mainly include the following: the steel plate reinforcement method, in which the adhesive is applied to the inner lining surface of th...

AI Technical Summary

Problems solved by technology

[0003] The existing tunnel lining reinforcement methods mainly include the following types: paste steel plate reinforcement method, apply adhesive to the inner lining surface of the tunnel and paste the steel plate, and then fix the steel plate surface with backing plate and expansion bolts to form a tunnel that is basically the same as the inner contour of the tunnel. The steel strip is finally poured with waterproof glue from both sides of the steel plate. The external steel strip is flexible reinforcement, but the bonding effect of the post-grouting after closing the gap between the steel plate and the lining is poor, and the steel structure is exposed to long-term corrosion. The durability is poor and the anchoring requirements are high. At the same time, the overall component is higher than the lining surface after reinforcement, and the lining surface is uneven and poor in aesthetics, which affects the driving line of sight; the section steel connection is reinforced, and the I-beam component is fixed on the inner surface of the tunnel by using connecting bolts and fixed anchor bolts to form combined rigidity structure to resist structural deformation, fast construction and high reinforcement strength, but the section steel invades the tunnel with large clearance, many welds, large fluctuations in welding quality, and unsafe open flames. At the same time, it is difficult to fill the contact surface between the section steel and the lining densely, and it corrodes quickly under the action of water seepage Aging will affect the bearing capacity of section steel; paste carbon, aramid fiber cloth reinforcement method, use fiber cloth to reinforce concrete, convenient transportation, fast construction, but only suitable for minor diseases such as extension cracks on the surface of the secondary lining of tunnels, fiber cloth method repair The bearing capacity of the structure is weak, and the disease is prone to continue to develop when the disease is serious

All of the above methods are limited by one or more conditions in encroachment headroom, weak corrosion resistance, poor durability and deformation constraint control

[0004] The existing technology also gives some solutions. The Chinese patent CN201810101584.X proposes a method for reinforcing reinforced concrete floors with profiled steel plates. The moment of inertia is relatively large, increasing the cross-sectional height of the reinforced concrete floor, improving the bearing capacity and seismic performance of the reinforced concrete floor, but if this patent is applied to tunnel lining reinforcement, it will still occupy the clearance, and the surface area of ​​the profiled steel plate is large. , poor corrosion resistance, and multiple anchor bolts are set at the trough, which requires a large amount of consumables, high cost and poor corrosion resistance

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