A safe excavation and disaster early warning equipment and method for tunnels with high water head across the river

Abstract

The invention discloses a safety excavation and disaster early warning equipment and method for a high-water-head tunnel crossing the river. It comprises a base, a fixed plate is installed at one end of the base, the fixed plate is rotatably connected to an adjustment seat, the other end of the base is hinged to a hydraulic rod, and the hydraulic rod is hinged to an adjustment seat. , A protective mechanism is installed between the base and the adjusting seat, a drilling rig is installed on the top of one end of the adjusting seat, the drilling rig is connected to a drill pipe, and the other end of the drill pipe is connected to a drill bit or a plugging head through a coupling. The hydraulic rod stretches, drives the adjusting seat to rotate along the fixed plate, and changes the pitch angle of the adjusting seat, so that the drill pipe drives the drill bit to drill along a predetermined angle, and the protection mechanism protects against accidental power failure to avoid equipment damage and personnel injury , when water gushing occurs in the borehole during drilling, the drill pipe drives the drill bit out, replaces the plugging head, and quickly pressurizes the borehole through the plugging head to inject grout, so that the mud penetrates into the gap on the inner wall of the borehole, thereby strengthening the plugging. Prevent and eliminate flood disasters.

Description

technical field [0001] The invention relates to the technical field of tunnel excavation, in particular to a safe excavation and disaster early warning equipment and method for a high water head tunnel crossing a river. Background technique [0002] The tunnel excavation adopts the drilling and blasting method, and the construction is guided by the theory of the New Austrian Method. The smooth blasting is adopted, and the whole section is excavated at one time. Cooperate with crawler excavator for slag discharge, adopt TST geological prediction system and advanced horizontal geological drilling for geological prediction and water exploration, according to geological conditions, choose to use anchor, spray, net, I-beam or pipe shed, and drill holes to lead water in advance , advanced pre-grouting and other support or its composite support form, when drilling a tunnel, the drilling rig and other equipment often adjust the angle through electric or hydraulic ejector rods. If th...

AI Technical Summary

Problems solved by technology

[0002] The tunnel excavation adopts the drilling and blasting method, and the construction is guided by the theory of the New Austrian Method. The smooth blasting is adopted, and the whole section is excavated at one time. Cooperate with crawler excavator for slag discharge, adopt TST geological prediction system and advanced horizontal geological drilling for geological prediction and water exploration, according to geological conditions, choose to use anchor, spray, net, I-beam or pipe shed, and drill holes to lead water in advance , advanced pre-grouting and other support or its composite support form, when drilling a tunnel, the drilling rig and other equipment often adjust the angle through electric or hydraulic ejector rods. If the accidental power failure occurs, the drilling rig will fall and be damaged. Equipment and dangerous personnel are safe, and water gushing hazards often occur during drilling. If the construction continues without timely warning and protection, it will easily lead to a large amount of water gushing or even collapse in the tunnel. Disaster early warning equipment and methods are used to solve the above problems

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