Fully autonomous maintenance equipment for tunnel concrete lining and its application method

Abstract

Fully autonomous maintenance equipment for tunnel concrete lining, including maintenance bench, controller, water spray device and distribution box. , Two rows of parallel arc-shaped water spray pipes are installed on the upper part of the maintenance platform. The invention is easy to operate, realizes the automation of maintenance, can automatically walk and spray, effectively reduces the cracks on the lining concrete surface, and can also automatically control the walking speed through the remote control , to ensure the strength and durability of the concrete lining, and produce indirect economic benefits; it is suitable for the maintenance construction of various types of tunnel lining concrete; the invention improves the construction efficiency, reduces the cost of the maintenance process, improves the appearance quality of the concrete, and purifies the air in the tunnel. The ventilation time is reduced, creating obvious economic benefits for construction. The invention also has the advantages of simple and compact structure, low manufacturing cost and easy use.

Description

technical field [0001] The invention belongs to the field of tunnel maintenance equipment, in particular to fully autonomous maintenance equipment for tunnel concrete lining and its application method. Background technique [0002] With the rapid development of road construction in my country, the proportion of plateau and mountain tunnel projects has gradually increased, and at the same time, higher requirements have been put forward for the strength, impermeability and durability of tunnel lining concrete. The main support forms of the tunnel are primary support and secondary lining support. Shotcrete must be used in the primary support, and the secondary lining support is mainly poured concrete. [0003] As the humidity of the concrete changes, its volume also expands or contracts linearly. For newly poured concrete, the volume deformation caused by humidity changes is plastic shrinkage; for hardened concrete, the volume deformation caused by humidity changes is drying s...

AI Technical Summary

Problems solved by technology

Since shrinkage is not uniform within the concrete block, this difference in volume change can create tensile stresses that promote cracks in the concrete block, thereby destroying the integrity of the surface layer and reducing its durability

[0004] In the construction of tunnel engineering, because the temperature in the tunnel is relatively constant and the air in the tunnel has a certain humidity, in the control of the concrete curing process, there is generally a phenomenon that insufficient attention is paid and the control is not strict, resulting in the maintenance of the primary support concrete and the second lining concrete. Not in place, strength and durability suffer

Moreover, due to the large cross-section and long distance of the long tunnel, artificial watering maintenance cannot ensure uniform watering, and the problem of concrete maintenance has become a common problem in tunnel construction.

[0005] At present, although there is water spraying maintenance equipment, it also requires workers to operate on site, and the level of automation is low

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