A cable anchor and its construction method

Abstract

The invention discloses an anchor cable anchorage device and a construction method thereof. A rotary type or rotary percussive drill is adopted. The anchor cable anchorage device comprises a disposable anchorage device head, a jet flow cutting body and a drill pipe. The drill pipe is provided with a hollow channel used for introducing high pressure fluid for cutting. One end of the drill pipe is provided with outer threads, the drill pipe is connected with the jet flow cutting body through the outer threads, an anchorage device head fixing seat is arranged at the top end of the jet flow cutting body far away from the drill pipe, the disposable anchorage device head is installed on the anchorage device head fixing seat, and the disposable anchorage device head is connected with a steel strand. On the basis of the existing anchor cable construction method, the anchor cable construction speed is greatly improved, an anchor cable fixing plate and the steel strand are brought into a hole while drilling is achieved, hole expanding and grouting are conducted, the complex transition procedures are greatly simplified, the problem of low anchor cable construction speed caused by different soil layer conditions such as drift sand, water layers, sludge, mortar and the like is solved, and construction quality (especially pulling resistance ) is ensured.

Description

technical field [0001] The invention relates to the field of civil engineering construction, in particular to the technical field of anchor cable construction, and in particular to a disposable anchor tool for anchor cable construction and a construction method. The method uses a high-pressure cement slurry knife to cut soil. Background technique [0002] At present, when utilizing the anchor cable to carry out the drilling construction, it is generally to drill the hole first, install the anchor cable after the drilling, and grout after installing the anchor cable. These operations are completed step by step, so it is difficult to form holes when encountering complex formations (such as broken rock, silt, quicksand, etc.). The more advanced ones use the anchor cable disposable drill bit to complete the anchor cable construction at one time, but the installation of the anchor cable disposable drill bit is relatively troublesome. Some anchor cable disposable drill bits are l...

AI Technical Summary

Problems solved by technology

Some anchor cable disposable drill bits are large in size, and some anchor cable disposable drill bits have complex structures, and they cannot remove the hard objects that appear during the drilling process in time, and their working efficiency is not obvious; the most important thing is that no matter the volume Large or complex structures greatly increase the cost of construction materials and labor costs, and it is not easy to make on-site, so that the construction period cannot be reliably guaranteed

[0003] The existing patent documents that have been published, such as the patent with the notification number CN2652998Y, are bundled steel strand anchor rods with their own rotary spray drill bits. Due to the relative sliding between the steel strands and the drill bits, the front and back of the steel strands are out of sync. , the steel strand is easily wound on the drill pipe, and due to the existence of the annular limit steel plate, the drill pipe is abolished because it cannot be pulled out from the wound steel strand; secondly, its forward direction still depends on the drill tip Drilling, if a hard object is pushed against the drill bit, the drill bit will stop moving forward, and the on-site use and maintenance workload will be greatly increased; another example is the patent of CN2900755Y, which has a larger volume of disposable drill bit and higher production cost , due to the relative sliding between the steel strand and the drill bit also causes the front and back of the steel strand to be asynchronous, the steel strand is easy to wrap around the drill pipe, but the drill pipe is easier to pull out, and it has no reaming function, only is drilling

[0004] And as the announcement number is CN1776185A described "the high-pressure water-jet drill bit that can hydraulically switch punching and slotting", the first is that the action principles of different structures in the applied field are different, and the second is that its anchor rod and steel strand It cannot be fixed, and its structure is too complicated to make it difficult to realize; in use, on the one hand, because the drill core has no positioning in the circumferential direction, the flow channel cannot form a passage due to the deflection of the drill core during use; on the other hand, the pressure regulating valve The unobstructed lower vent hole will also make the flow channels unable to form the expected passages, fail to achieve the corresponding functions, and make maintenance difficult

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