Construction method for keeping anchor rod in center of drill hole

Abstract

The invention particularly relates to a construction method for keeping an anchor rod in the center of a drill hole. The problems that in an existing method for positioning an anchor rod through a ship-shaped steel bar, the ship-shaped steel bar is prone to rotating, deforming and being dislocated in the application process are solved. The construction method for keeping the anchor rod in the center of the drill hole comprises the steps that S1, a plurality of vertical rib column grooves are formed in a surrounding rock wall in the vertical direction; S2, a plurality of anchor rod holes are drilled in the bottom wall of each vertical rib column groove; S3, a plurality of anti-pulling resistance blocks and a plurality of ship-shaped supports are installed on the anchoring section of each thread steel bar anchor rod; S4, the thread steel bar anchor rods are placed in the anchor rod holes, and cement mortar is poured into the anchor rod holes; S5, steel bars of vertical rib columns and panels are bound, formwork erecting is conducted, and the vertical rib columns and the panels are constructed through cast-in-place concrete; and S6, the ends of the thread steel bar anchor rods are subjected to anchor sealing on the outer sides of the panels. According to the construction method, the ship-shaped supports are effectively prevented from rotating and moving, the anti-pulling performance of the thread steel bar anchor rods is improved, the anchoring length can be shortened, and therefore the construction cost is reduced, and the construction progress is accelerated.

Description

technical field [0001] The invention relates to a construction method for stonework excavation of a high slope stability protection project, in particular to a construction method for keeping an anchor rod at the center of a borehole. Background technique [0002] With the expansion of construction scale and the advancement of civil engineering technology, foundation pits continue to deepen and steep slopes continue to increase. In recent years, new support structures that use anchor rods (or anchor cables) to provide balance force have been widely used, such as anchor retaining structures. Walls are one of them. At present, in anchor retaining wall projects, hot-rolled threaded steel bars are generally used directly as the material of the anchor, and boat-shaped steel bars are tied on the anchor bars to support the anchor to a certain extent, and the anchor is fixed on the drill. The purpose of the center of the hole. [0003] However, practice has shown that the existing...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a construction method for keeping the anchor at the center of the borehole in order to solve the problems that the existing ship-shaped steel bar positioning anchor rod is prone to rotation, deformation and dislocation in application.

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