Pre-stressed anchor cable anchoring terminal device for deep large landslide super long anchoring

Abstract

The invention discloses a pre-stressed anchor cable anchoring terminal device for deep large landslide super long anchoring; the pre-stressed anchor cable anchoring terminal device comprises a structure body (1), embedded poles (2), a cylindrical rod body (3), and a limit ring (4); the structure body is used for connecting and assembling parts in the anchoring terminal; the cylindrical rod body is built in a hole (10) of the structure body; a steel cable (6) penetrates the cylindrical rod body and is fixedly connected with the end of the cylindrical rod body; parallel grooves (9) outside the cylindrical rod body are tightly engaged with sawteeth (8) on the top of the embedded poles; the cylindrical rod body moves downwards to drive the embedded pole to rotate and expand, so the embedded pole can be embedded into tunnel wall surrounding rocks so as to provide anchoring force; the limit ring can limit the maximum expanding level of the embedded pole, so all embedded poles can be expanded in synchronization; the pre-stressed anchor cable anchoring terminal device is clear in principle, simple and smart in structure, can carry out pre-stress tension after installation so as to provide instant anchoring force, so the pre-stress force can be evenly and synchronically taken by a plurality of anchoring terminal devices; the pre-stressed anchor cable anchoring terminal device can satisfy following anchor cable supplemental tension, and is suitable for deep large landslide instant or permanent stable support needing super long anchoring.

Description

technical field [0001] The invention relates to an anchor cable anchoring end device, which belongs to the field of geotechnical engineering prestressed anchor cable anchoring, in particular to a prestressed anchor cable anchoring end device for super-long anchoring of deep and large landslides, and is mainly suitable for instantaneous or permanent anchor support. Background technique [0002] In recent years, with the continuous development of the economy, the construction of some highways and other projects is gradually moving towards the remote mountainous areas in the west. Similar projects inevitably have to pass through large-scale landslides, and the subsequent support for the stability of deep and large landslides in mountainous areas Nursing has also gradually attracted people's attention. [0003] Prestressed anchor cables are widely used in the stability support of landslides because of their advantages such as large anchorage depth and ability to provide active ...

AI Technical Summary

Problems solved by technology

This kind of anchor cable only relies on the strength of the surrounding rock near the anchorage end of the hole top and cannot make full use of the strength of the surrounding rock on the side wall of the entire length of the hole, and most of them have the problem of insufficient anchoring force; Insufficient or the single anchor point between the anchor head and the surrounding rock is not firmly anchored, and the entire device will fail

[0007] There are few types of full-length multi-terminal anchor cables, and most of them rely on mechanically adding anchor cable anchor devices to achieve multi-terminal anchoring. The device assembly is often random; after the anchor device is installed, can it be fully embedded in the cave wall? Or it is difficult to ensure that the force of each anchoring end is synchronized and uniform; and the actual situation is often that after the installation of the device, only part of the anchoring end is embedded in the surrounding rock to provide anchoring force, while most of the anchoring ends are in a free state, resulting in material waste and anchoring efficiency. Reduced, and each anchoring end cannot be uniformly and synchronously stressed, which can easily cause individual anchoring end devices to be pulled down, resulting in a chain effect that gradually fails the anchor cable

[0008] In summary, the problems of "device rooting" and "supporting time" existing in the super-long anchorage of prestressed anchor cables in deep and large landslides need to be solved urgently

Images