A device and method for sealing and consolidating grouting orifice pipes in soft water-rich surrounding rock

Abstract

The invention relates to a device and a method for closing and consolidating grouting orifice pipes in loose and soft water-rich surrounding rock. The device mainly comprises an outer orifice pipe. The inside of the front end of the outer orifice pipe is connected with the outside of a blocking disc in a threaded manner, and the inside of the blocking disc is closely connected with an inner grouting pipe in a threaded manner; the outer side of the blocking disc is fixedly connected with a lower grout stopping plate, and the lower grout stopping plate is connected with an upper grout stopping plate in an insertion manner; the upper grout stopping plate is further fixedly connected with one end of a stay, and the other end of the stay is positioned on the other side of the blocking disc; the rear end of the outer orifice pipe is fastened with the inner grouting pipe by a locking mechanism. The device and the method have the advantages that brand-new structures are designed, accordingly, grout can be quickly diffused under low grouting pressures by the aid of synergistic effects of the inner grouting pipe and the outer orifice pipe, effects of closing and consolidating the orifice pipe and the inner walls of drilled holes can be improved, and the grouting construction safety can be guaranteed; the difficult problem of hole sweeping re-drilling due to existing processes for grouting, closing and consolidating orifice pipes in full-filling modes can be solved, and grout wastage can be prevented.

Description

technical field [0001] The invention relates to the technical field of water disaster prevention and control for underground projects such as tunnels, subways, mines, water conservancy and hydropower, etc., and specifically relates to a device and method for closing and consolidating grouting orifice pipes in soft water-rich surrounding rocks. Background technique [0002] In recent years, my country's investment in infrastructure construction has continued to increase, and the construction scale and difficulty of underground projects such as traffic tunnels, urban subways, and diversion tunnels have increased. Underground engineering construction often encounters soft water-rich surrounding rocks with well-developed water-conducting structures, which can easily induce major geological disasters such as water and mud inrush during construction, posing a great threat to engineering safety. [0003] Grouting method is one of the most effective means to control water and mud in...

AI Technical Summary

Problems solved by technology

[0007] This conventional process has extremely high requirements on the control of grouting pressure. When the pressure of grouting into the orifice pipe is low, the diffusion range of the grout in the loose and broken surrounding rock is small, and it is difficult to fully seal the gap between the outside of the orifice pipe and the surrounding rock. , leading to poor sealing and consolidation quality of the orifice pipe; when the grouting pressure is high, the grout will migrate in the shallow stratum, resulting in serious deformation of the shallow surrounding rock and the construction platform, threatening construction safety

[0008] At the same time, this conventional process needs to fill the entire space in the orifice pipe with grouting. When the drilling is extended, the grout stone body in the pipe needs to be swept first, which increases the workload of re-drilling and reduces the construction efficiency.

[0009] In addition, the sealing and consolidation process of the orifice tube with full filling in the tube will also cause a certain degree of slurry waste

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