Airbag grout-block valve pipe assembly for conveniently perforating and slip casting construction

Abstract

The invention discloses an airbag grout-block valve pipe assembly for conveniently perforating and slip casting construction. The airbag grout-block valve pipe assembly includes a slip casting drill pipe, a rod body grout-block valve, a rod body grout-out hole, a slip casting valve pipe body, a grout-block airbag, a slip casting pipe, an inflating pipe and a slip casting gun; the slip casting drill pipe is provided with the rod body grout-out hole which is provided with the rod body grout-block valve, the slip casting drill pipe is provided with the slip casting pipe body which is provided with the grout-block airbag, and the grout-block airbag forms an integral whole on the slip casting valve pipe body; and the front portion of the slip casting valve pipe body is connecting with the slipcasting gun, the tail portion of the slip casting valve pipe body is connected with the slip casting pipe, and the grout-block airbag is connected with the inflating pipe. According to the airbag grout-block valve pipe assembly for the conveniently perforating and slip casting construction, the slip casting efficiency is greatly improved, compared with existing slip casting valve pipe products, the airbag grout-block valve pipe assembly has the advantages of higher grout-out speed and grout-out pressure, wider slip casting semi-diameter, denser grout liquid filling effect and better grout liquid non-return performance under the same slip casting pressure, and the phenomenon of pipe plugging due to use of the grout liquid with quick set and early strength can be effectively prevented.

Description

technical field [0001] The invention relates to the field of engineering grouting for tunnels and underground engineering, slope protection and treatment, foundation reinforcement, etc., and specifically relates to an air bag grouting stop valve pipe assembly that is convenient for drilling and grouting construction. Background technique [0002] Since the Soletancle-3 grouting method was invented in the 1950s, it has been widely used due to its advantages of controllable layered grouting and better control of grouting pressure and grouting range. Research and transformation have formed the current sleeve valve pipe grouting method. [0003] After years of engineering practice and demonstration, it is found that the sleeve valve pipe grouting method has the following problems: (1) During the grouting process, with the increase of the grout pressure at the front of the sleeve valve pipe, the PVC grout with low bending stiffness The bowl is easily bent in reverse, and grout l...

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Problems solved by technology

[0003] After years of engineering practice and demonstration, it is found that the sleeve valve pipe grouting method has the following problems: (1) During the grouting process, with the increase of the grout pressure at the front of the sleeve valve pipe, the PVC grout with low bending stiffness The bowl is easily bent in reverse, causing grout leakage, resulting in a decrease in the grouting pressure at the front of the sleeve valve pipe, incomplete grouting, and even scrapping of the grouting pipe; Sleeve valve pipe construction method must control the grouting pressure, the grouting pressure is small and the speed is slow, the grouting radius is reduced and the time is long, the fluidity of the grout is reduced or even solidified, and finally the pipe is blocked, which seriously reduces the construction efficiency; (3) Drilling The rod opening does not have a non-return function. After the grouting construction is completed, the grout will flow back, and the grouting effect will be greatly reduced.

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