Hundred-bead supporting plate device for preventing shield tunneling machine from head falling and construction method thereof

Abstract

The invention relates to the technical field of underground tunnel excavation construction, in particular to a hundred-bead supporting plate device for preventing a shield tunneling machine from headfalling and a construction method thereof. The device comprises hundred-bead supporting plate units, a jack, a base and a steel sleeve; the bottom of the steel sleeve is provided with a hole opening used for being penetrated by the jack; the output end of the jack is fixedly connected with the bottoms of the hundred-bead supporting plate units; the outer wall of the jack is welded to the hole opening; the bottom of the jack is connected with the top of the base located on the ground of a receiving well; each hundred-bead supporting plate unit comprises an arc-shaped supporting plate, balls, alimiting strip and an arc-shaped cover plate; each arc-shaped supporting plate is a steel plate of an arc-shaped structure; the curvature of each arc-shaped supporting plate is the same as the curvature of the outer surface of the shield tunneling machine; and semispherical grooves used for containing the balls are evenly distributed in the upper surface of each arc-shaped supporting plate. According to the hundred-bead supporting plate device for preventing the shield tunneling machine from head falling and the construction method thereof, the construction risk is greatly reduced, the grouting construction requirement in the steel sleeve is greatly reduced, environmental protection is achieved, the construction difficulty is reduced, the construction cost is saved, and the construction progress is accelerated.

Description

technical field [0001] The invention relates to the technical field of underground tunnel excavation construction, in particular to a 100-bead support plate device and a construction method for preventing a shield machine from burrowing. Background technique [0002] Because the subway shield construction is carried out section by section, after the completion of the section tunnel construction, the shield machine needs to pass through the shaft wall of the receiving well, and then exit the well to the ground, resulting in a shield machine receiving problem. When the current steel sleeve receives the shield machine, it is necessary to inject double-slurry mud or dense sand with a certain strength and stable quality into the steel sleeve, so as to play a certain supporting role for the shield machine and prevent the shield machine due to the gravity of the shield machine. The unbalanced effect will lead to difficulties in receiving and construction, or even failure of receivi...

AI Technical Summary

Problems solved by technology

When the front steel sleeve receives the shield machine, it is necessary to inject a certain strength into the steel sleeve with stable and uniform quality double slurry mud or dense sand to play a certain supporting role for the shield machine and prevent the Due to unbalanced action, it will lead to difficulties in receiving construction, or even failure in receiving construction, causing engineering accidents

However, due to the grouting or sandy soil inside the steel sleeve, it is difficult to control the construction quality only by experience, and it is easy to have insufficient strength, unevenness, poor reinforcement or non-compactness, etc., and it is difficult to avoid the occurrence of head falling

In addition, if the mud strength is too high, the shield excavation will generate a relatively large torque, which will be transmitted to the steel sleeve, and finally the ground outside the steel sleeve will be balanced by the supporting reaction force, which will increase the difficulty and cost of construction

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