Prestress full-length anchoring mortar anchor rod for underground cave depot and rapid anchoring tensioning method

Abstract

The invention discloses a prestress full-length anchoring mortar anchor rod for an underground cave depot. The anchor rod is characterized in that resin cartridges are located at the bottom of a drillhole and used for anchoring the end of a full-length anchor rod body to serve as an anchoring section after being smashed, the tail end of the full-length anchor rod body is arranged at an opening ofthe drill hole through an anchor backing plate and used for prestress tensioning, a grouting pipe and an exhaust pipe are inserted into the anchor backing plate, the grouting pipe is used for grouting and anchoring of a free section, the exhaust pipe is used for grouting and exhausting of the free section, and the exhaust pipe is placed along the full-length anchor rod body and extends to the junction of the anchoring section and the free section. Meanwhile, the invention further provides a rapid anchoring method of the prestress full-length anchoring mortar anchor rod for the underground cave depot. According to the anchor rod and the method, the characteristics that an end anchoring anchor rod exerts prestress to actively reinforce surrounding rock and is large in stress diffusion rangeare achieved, the advantages that a full-length anchoring anchor rod is high in supporting rigidity and sensitive to surrounding rock deformation and bed separation are achieved, and the roadway surrounding rock deformation can be prevented in time; and the installation process is simple, the consumed time is short, and a guarantee is provided for rapid tunneling of a cavern or a roadway.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and in particular relates to a prestressed full-length anchoring mortar bolt for underground caverns and a rapid anchoring tensioning method. Background technique [0002] According to different anchoring methods, anchors can be divided into end anchors, extended anchors and full-length anchors. In order to improve the rigidity of the support system, prestressing is applied to most end anchorage bolts and extended anchorage bolts, while full-length anchorage bolts are difficult to apply prestress due to the complex construction process, and generally no prestressing is applied. However, in some underground projects where the surrounding rock is loose, weak and broken, the joints are densely developed, and the self-stabilizing force is poor, it is difficult for the traditional full-length anchored mortar bolt to meet the support requirements: First, this type of bolt does not appl...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of poor anchoring effect, complicated installation process and long time-consuming of existing full-length anchor bolts, a prestressed full-length anchor mortar anchor rod for underground caverns is proposed, which can realize full-length anchorage of prestressed anchor bolts quickly Install in place to improve the effect of bolt support, simplify the installation steps of prestressed full-length anchor bolts, and provide guarantee for the rapid excavation of caverns or roadways

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