Rapid assembly type tension-compression composite anchor rod and construction method thereof

Abstract

The invention discloses a rapid assembly type tension-compression composite anchor rod and a construction method thereof. The rapid assembly type tension-compression composite anchor rod comprises a finish rolling deformed steel bar, a first barrel type pressure bearing plate, friction increasing plates, a grease strip, an anti-corrosion sleeve, a water swelling rubber pipe, a water stop pipe anda guide cap. When the system is used, the first barrel type pressure bearing plate, the friction increasing plates and the guide cap are sequentially arranged on a tension anchoring section of the finish rolling deformed steel bar in a sleeving mode, the grease strip and the anti-corrosion sleeve are arranged on a pressure bearing anchoring section in a sleeving mode, the water swelling rubber pipe and the water stop pipe are arranged outside the anti-corrosion sleeve at the junction with a structural layer in a sleeving mode, the bottom of a bent steel bar of the structure layer is sleeved with a spiral steel bar, the top of the bent steel bar of the structure layer is sleeved with a bearing plate and a second barrel type pressure bearing plate, all the components are constructed in an assembled mode, no welding component exists, all the components can be produced in a standardized and batched mode, and the quality of all the components of the system can be effectively guaranteed. Construction is more convenient, the construction period can be greatly shortened, and the corrosion resistance of the finish rolling deformed steel bar can be remarkably improved.

Description

technical field [0001] The invention relates to a fast-assembled tension-compression composite anchor rod and a construction method thereof, belonging to the technical field of building construction. Background technique [0002] Theoretical research and engineering application of an authorized tension-compression composite anchor (patent number: ZL201420450678.5) shows that under the same anchorage length, the bearing capacity of the tension-compression composite bolt is significantly improved. Since a large number of permanent anti-floating anchors are used in underground engineering, the application of tension-compression composite anchors as permanent anchoring structures in permanent engineering will generate huge economic and social benefits. [0003] Since most of the anti-floating anchors are constructed underwater and are permanent projects, reliable construction techniques are required to ensure the quality of the anchors, including reliable bearing capacity and go...

AI Technical Summary

Problems solved by technology

[0004] In addition, in the construction process of the existing anchor rods, the centering and guiding construction of the anchor rods (such as steel bars) is extremely important. In order to guide the anchor rods, guide caps will be provided at the ends of the anchor rods. The existing guide caps Most of the outer diameter is a fixed size. During the bolt drilling process, the diameter of the bolt hole is affected by the vibration of the drill pipe, the local collapse of the hole wall, the deviation of the borehole from the axial direction, and the small diameter of the local borehole, etc. The diameter is not equal, and the phenomenon of local reaming or cable hole and inclined hole is common.

Therefore, the following engineering accidents are prone to occur during the drilling process of the anchor rod body with a fixed diameter guide cap: (1) the anchor rod body deviates from the axis, causing the axis of the steel bar to deviate from the axis of the anchor rod drilling, seriously affecting the anchor rod The force of the steel bar brings great safety hazards to the project; (2) at the shrinkage hole, the diameter of the guide cap is larger than the diameter of the drill hole, and the anchor rod body cannot pass through the shrinkage hole section, resulting in the anchor rod body being unable to be put into the drill hole within, seriously affecting the construction period

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