CN2178281Y

CN2178281Y - Inverted wedge fixing type minor diameter anchoring bolt

Info

Publication number: CN2178281Y
Application number: CN 93236878
Authority: CN
Inventors: 孙智; 陈庆敏; 张晓光
Original assignee: China University of Mining and Technology CUMT
Current assignee: China University of Mining and Technology CUMT
Priority date: 1993-05-13
Filing date: 1993-05-13
Publication date: 1994-09-28
Anticipated expiration: 2003-05-13

Abstract

The utility model relates to an inverted wedge fixing type minor diameter anchoring bolt, composed of a wedge block, a gasket and a rod body, wherein, the rod body is arranged in the anchor eye, the gasket is sheathed on the revealable end of the rod body, to make the revealable end close to the rock hole end surface; the wedge block is inverted from the rod end along the axial grooves, to press the end into an expansion inverted wedge head; the gasket is clamped to force the anchoring bolt to get stress entirely, so the rock can be anchored. Due to the fact that the anchor head has no need of threads, the stress concentration in the bottom of thread can be eliminated, thereby, enhances the integral tensile strength of the anchoring bolt, and can give the reins of strength and plasticity potential to the anchoring bolt body. The utility model has the advantages of simple and reasonable structure, easy manufacture, convenient operation, and low cost.

Description

Inverted wedge fixing type minor diameter anchoring bolt

The utility model relates to a kind of suspension device of underground passage engineering, especially a kind of minor diameter anchor pole that is applied to bolt-spary supports.

The minor diameter anchor pole is the important component part of the bolt-spary supports of underground construction extensive use, annual China needs bolt-spary supports with regard to more than 1,000 kilometer underground construction is arranged, required anchor pole reaches more than 2,000 ten thousand, and the performance quality of minor diameter anchor pole directly affects the quality of bolt-spary supports engineering, a large amount of work has been carried out in the research of anchor pole both at home and abroad, successively developed the anchor pole of multiple structure.The pattern of minor diameter anchor pole has many types, is fixed in the structure of part in the rock mass but the difference of every kind of anchor pole only is the anchor pole afterbody, and the anchor pole fastening part of part all adopts and is threaded outside rock mass.As everyone knows, after a smooth body of rod is processed into screw thread, the diameter of thread root reduces 15% than smooth shaft body diameter, and thread root very easily causes stress to concentrate, when just having caused the minor diameter anchor pole stressed, this at first ruptures at screw portion, the minor diameter anchor pole can not be stretched, and the intensity potentiality of material can not finely be brought into play.

The purpose of this utility model is to design a kind of fixed pattern minor diameter anchor pole that is fixed to for the shortcoming that overcomes above-mentioned prior art, and it is simple in structure, without helicitic texture, intensity height, can give full play to the potential ability of material.

Task of the present utility model realizes that as follows it is made up of voussoir, packing ring and the body of rod, and the body of rod is that afterbody is the elongate rod of fried dough twist type, and its head has one section groove along axis, and packing ring is the circular ring type packing ring; Pack into the body of rod in the anchor hole of rock mass and after the slip casting, at its body of rod head suit upper gasket that exposes, fall wedge with voussoir along the axis groove of body of rod head again, body of rod head is squeezed expand into the termination of falling the wedge-type, make packing ring be close to the anchor hole outer face around, it can make anchor pole after fixing when rock mass moves like this, be subjected to the constraint of packing ring, the masterpiece that produces on the packing ring is used on the anchor pole termination of falling the wedge-type, when rock mass the power on the packing ring of acting on increases, packing ring and anchor pole wedge head jam-packed force anchor pole integral body stressed, with the crag anchoring.Packing ring can also be made the circular ring type packing ring, has two conical bores on it at least; The body of rod also can also be made the monolithic head of falling the wedge, need not use voussoir, and be used with the packing ring that conical bore is arranged.

The utility model has the following advantages compared with the prior art, and its diameter that exposes fixed end can when packing ring intensity is enough, can guarantee the whole stressed and distortion of anchor pole greater than the body of rod; Rock bolt head does not need machining screw, has avoided the stress of thread root to concentrate, and has strengthened the tensile strength of anchor pole, can give full play to the intensity and the plasticity potentiality of anchor bar body, and it is simple and reasonable, processing method is simple, easy to operate, cost of production is low, has stronger practicality.

Description of drawings:

Fig. 1 is an I type structure chart of the present utility model.

Fig. 2 is that the A of structure chart of the present utility model is to view.

Fig. 3 is an II type structure chart of the present utility model.

Fig. 4 is that the B of structure chart of the present utility model is to view.

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail, as shown in Figures 1 and 2, it is made up of voussoir 1, packing ring 2 and the body of rod 3, voussoir 1 is flat voussoir, the body of rod 3 is the elongate rod that afterbody is the fried dough twist type, head has one section groove along axis, in the anchor hole of rock mass that the body of rod 3 is packed into, after the slip casting, at its exposed junction suit packing ring 2, again with voussoir 1 vertically groove wedge the body of rod 3 heads, body of rod head be squeezed and expand into the head of falling the wedge, packing ring is expanded and be closely attached on around the anchor hole outer face, force anchor bar body integral body stressed.

As shown in Figures 3 and 4, it is monolithic wedge head that the body of rod 3 can also be made for head, and its afterbody still is the elongate rod of fried dough twist type, and packing ring can also be made for the circular ring type packing ring, has two conical bores on it at least; Packing ring is inserted in after the body of rod earlier, again the body of rod 3 is packed in the anchor hole, packing ring 2 is adjacent to around the petrosal foramen outer face, slip casting from the conical bore of packing ring again makes in the packing ring jam-packed body of rod anchor hole, and packing ring 3 is adjacent to around the petrosal foramen, slip casting from the conical bore of packing ring again, make the wedge head of the packing ring jam-packed body of rod 3, force anchor bar body integral body stressed, the crag anchoring.

Claims

1, a kind of fixed pattern minor diameter anchor pole that is fixed to is characterized in that it comprises voussoir (1), packing ring (2), the body of rod (3), and the body of rod (3) is that afterbody is the elongate rod of fried dough twist type, and its head has the groove that one section groove is installed voussoir along axis.Packing ring (2) is the circular ring type packing ring.

2, the fixed pattern minor diameter anchor pole that is fixed to according to claim 1, the head that it is characterized in that the described body of rod (3) can be made monolithic and fall wedge type.

3, the fixed pattern minor diameter anchor pole that is fixed to according to claim 1 is characterized in that the Passscheiben (2) of the described integral body body of rod of falling the wedge type (3) is the circular ring type packing ring, has two conical bores on it at least.