A rapid plugging air bag for underwater drilling and its plugging method

Abstract

The invention discloses an underwater drilling fast blockage air bag, comprising an air bag body made of rubber; a cylindrical bulge is arranged at the top of the air bag body; an air inlet / outlet is formed in the outer wall of the cylindrical bulge; the air inlet / outlet is communicated with the inner cavity of the air bag body by a channel arranged in the cylindrical bulge; an air guide pipe is arranged at the air inlet / outlet, and the other end of the air guide pipe is provided with a control valve; a connection ring is sleeved on the air bag body; the connection ring is positioned at the upper part of the air bag body; a plurality of connection ropes are uniformly distributed along the circumferential direction of the connection ring; a falling weight is arranged at the tail end of each connection rope. The underwater drilling fast blockage air bag is good in blockage effect, can block an underwater geological drilled hole with failure in very short time, and the implementation method is simple and feasible.

Description

technical field [0001] The invention relates to a plugging air bag, in particular to an underwater drilling rapid plugging air bag and a plugging method thereof. Background technique [0002] Drill and blast methods are generally used to construct tunnels in underwater rock formations. During blasting and excavation, even if it has been dealt with in the early stage, under the action of blasting vibration and high water pressure, the existing geological drilling position in the upper part is still a weak link. Once water gushing occurs, it will affect the safety of operators and equipment in the tunnel. At this time, it is necessary to quickly block the water gushing drilling site to ensure the safety of operators and equipment and to gain time for subsequent treatment measures. [0003] The shield tunneling method is commonly used to build tunnels in soft underwater strata. When the shield machine excavates in the middle of the river and the sea, due to the generally smal...

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Problems solved by technology

However, the above-mentioned grouting and concrete landfill plugging methods have the following disadvantages: 1. It is necessary to choose cofferdams or water drilling platforms for construction when the water surface is calm in dry seasons such as rivers (rivers), and the operation time is greatly limited and the cost is high; During underwater grouting, it is difficult to effectively control the diffusion range of the grout, and it is difficult to test the grouting effect; 2. Since the grouting grout will inevitably diffuse into the water, the alkaline grout will cause serious pollution to the water body; 3. Underwater drilling It is very difficult to seal the hole. Since there is no stable working platform on the water surface, the operation time is long and the working environment is demanding. Drilling down geological holes for plugging simply does not provide enough time to ensure the safety of personnel and equipment

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