Pre-tensioned and post-anchored prestressed anti-floating anchor rod construction method

Abstract

The invention relates to the technical field of prestressed anti-floating anchor rod construction, and discloses a pre-tensioned and post-anchored prestressed anti-floating anchor rod construction method. The pre-tensioned and post-anchored prestressed anti-floating anchor rod construction method comprises the following steps: 1) performing prestressed anchor rod construction; and forming a drilling hole in a soil body by construction, lowering a prestressed anchor rod to drill a hole, and pouring mud in the drilled hole after the prestressed anchor rod is lowered, wherein the prestressed anchor rod comprises an anchor head and a rod body; 2) enabling the anchor head to be positioned out of the drilled hole, and enabling the rod body to be located in the drilled hole; excavating along theperiphery of the anchor head to form a construction groove, and performing reinforced concrete construction in the construction groove to form an anchor pier; 3) tensioning and locking the prestressedanchor rod; and 4) constructing an underground structure above the soil body, and anchoring the anchor head into the underground structure. Therefore, prestressed anchor rod construction, anchor pierconstruction and underground structure construction are not interfered with one other, and construction management is facilitated; tensioning and locking are facilitated, and construction steps are simplified; and moreover, restraining force is generated on the underground structure to prevent the underground structure from floating upwards, and the underground structure is prevented from floating upwards and deforming, so that an anti-floating effect is enhanced.

Description

technical field [0001] The patent of the present invention relates to the technical field of prestressed anti-floating anchor rod construction, in particular, it relates to a prestressed anti-floating anchor rod construction method which is pre-tensioned and then anchored. Background technique [0002] Anti-floating anchor is an anti-floating technology used by underground structures to resist water buoyancy. It is widely used at home and abroad, especially in China in recent years. The buried depth of hydraulic construction and other underground projects is getting deeper and deeper, and anti-floating anchors are increasingly playing an irreplaceable important role. [0003] Anti-floating anchors are generally permanent structures, which are divided into two categories: prestressed anchors and fully bonded anchors (non-prestressed anchors). [0004] Full-bonded anchor rods are used: bare anchor bars are used for the anchor bar, and cement slurry is poured into the borehole...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a construction method for prestressed anti-floating anchor bolts that are pre-tensioned and then anchored, aiming to solve the problems of poor anti-floating effects and complicated construction in the construction of geotechnical anchoring projects in the prior art

Images