Locating beam frame of pre-buried curtain grouting pipe in underground diaphragm wall

Abstract

The invention relates to the technical field of water conservancy and hydropower construction engineering, and discloses a positioning beam frame for curtain grouting pipes in an underground anti-seepage wall, including positioning columns pre-buried around the opening end face of the anti-seepage wall, and positioning columns located on both sides of the opening end of the anti-seepage wall. The hoop beam and the lock plate, the surrounding positioning columns are symmetrical to the axis center of the anti-seepage wall, the hoop beam is provided with a positioning hole matching the positioning column, and the positioning hole is aligned with the positioning column on the side of the hoop beam. Correspondingly; the two opposite side walls of the hoop beam are slidingly provided with holding blocks; one end of the holding block is provided with an arc-shaped notch, and the other end is rotated with a bolt rod, and the bolt rod is threaded with the hoop beam connection; the bottom surface of the lock plate is in contact with the hoop beam, and its side is snapped into the corresponding positioning columns located at both ends of the hoop beam, which solves the difficulty and high efficiency of the existing curtain grouting pipe positioning, locking, and disassembly construction. Low and unstable verticality adjustment for curtain grout pipes.

Description

technical field [0001] The invention relates to the technical field of water conservancy and hydropower engineering, in particular to a positioning beam frame for a curtain grouting pipe in an underground anti-seepage wall. Background technique [0002] Curtain grouting is the construction of anti-seepage curtain by grouting in the rock or gravel foundation of the gate dam. The top of the curtain is connected with the concrete gate floor or the dam body, and the bottom is penetrated to a certain depth in the relatively impermeable rock layer to prevent or reduce the penetration of groundwater in the foundation. ; Working together with the drainage system located downstream, it can also reduce the uplift pressure of seepage water flow on the gate dam. Curtain grouting has always been the main means of anti-seepage treatment for foundations of hydraulic structures, and plays an important role in ensuring the safe operation of hydraulic structures. [0003] In order to obtain ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention provides a positioning beam frame for curtain grouting pipes in an underground cut-off wall to achieve the purpose of fast positioning and locking of the curtain grouting pipes and flexible fine-tuning of the verticality of the curtain grouting pipes. It solves the problems that the existing curtain grouting pipe is difficult to locate, lock and disassemble, the efficiency is low, and the verticality adjustment of the curtain grouting pipe is unstable.

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