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Drill expanding aiguille of anchor shaft, anchor cable, stake and drill expanding technology

A reaming drill bit and civil engineering technology, applied in the direction of drill bit, earthwork drilling, drilling equipment, etc., can solve the problem of large differences in cement soil strength and consolidation age, unstable reaming diameter, and no expansion head bolt and other problems, to achieve the effect of easy maintenance, simple structure and strong structure

Inactive Publication Date: 2007-06-20
陆观宏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: for different formations, the diameter of the reaming hole is unstable, and it is not easy to grasp during construction; the expansion head system of cement soil formed by high-pressure rotary spraying, the strength and consolidation age of the cement soil vary greatly due to different soil layers. Big
The disadvantage of this method is; it is not suitable for formations above hard plastic or solid
The enlarged diameter is irregular and not easy to grasp
[0008] Therefore, at present, the expansion head bolts in our country have not been promoted. Except for the technical content of the expansion head bolts in some specifications, most of the specifications, manuals, and literature materials do not have the relevant content of the expansion head bolts.

Method used

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  • Drill expanding aiguille of anchor shaft, anchor cable, stake and drill expanding technology
  • Drill expanding aiguille of anchor shaft, anchor cable, stake and drill expanding technology
  • Drill expanding aiguille of anchor shaft, anchor cable, stake and drill expanding technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] As shown in Fig. 1 and Fig. 2, the reaming drill bit for civil engineering of the present invention comprises an end shaft sleeve 1, a front drill piece 2, a rear drill piece 3, a rear shaft sleeve 4, a steel casing 5, and an end shaft sleeve 1 is hinged with one end of three front drill pieces 2 which are evenly distributed; the other end of the front drill piece 2 is respectively hinged with one end of three rear drill pieces 3; the other end of the rear drill piece 3 is hinged with the rear bushing 4; The hinged front drill piece 2 and the rear drill piece 3 can expand outwards; the rear axle sleeve 4 is provided with three through holes 41, and the rear axle sleeve 4 is fixed on the steel casing 5. The drill pipe is connected to the steel casing 5 through a connecting cap.

Embodiment 2

[0036] As shown in Figures 3 and 4, the reaming drill bit for civil engineering of the present invention includes an end shaft sleeve 1, a front drill piece 2, a rear drill piece 3, a rear shaft sleeve 4, a steel casing 5, and a central shaft 6 , spring 7 and nut 8, the end bushing 1 is hinged with one end of three front drill pieces 2 in an evenly distributed state; the other end of the front drill piece 2 is hinged with one end of three rear drill pieces 3 respectively; the rear drill piece 3 The other end is hinged with the rear bushing 4; the hinged front drill piece 2 and the rear drill piece 3 can expand outward; the rear bushing 4 is provided with three through holes 41, and the rear bushing 4 is fixed on the steel casing 5 on. A square central shaft 6 is provided between the end shaft sleeve 1 and the rear shaft sleeve 4, and the middle part of the rear shaft sleeve 4 is provided with a square through hole 42 compatible with the central shaft 6; one end of the central ...

Embodiment 3

[0038] In this embodiment, the reaming technology of the present invention is applied to the expansion head anchor cable, and the aperture is enlarged from 150mm to 300mm, as shown in Figure 5 and Figure 10; the specific operation steps are:

[0039] (a) First assemble the reaming drill bit, place the assembled drill bit at the angle of the anchor cable according to the inclination angle of the anchor cable, and adjust the nut on the screw rod of the reaming drill bit to make the front and rear drill pieces naturally under the spring force Open, after opening, the angle between the front and rear drill pieces should be less than or equal to 90 degrees.

[0040] (b) Drill a hole first with a common drill bit, and after drilling to the position where the head needs to be enlarged, stop drilling and pull out the common drill bit.

[0041] (c) Replace the reaming drill, retract the front and rear drill pieces of the reaming drill back to their original positions (that is, the st...

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Abstract

The present invention discloses a reaming bit for anchor rod, anchor rope and pile in civil engineering and its reaming method. It is aimed at providing a reaming bit for anchor rod, anchor rope and pile in civil engineering which has firm structure, extensive application range and easy operation and maintenance. Said bit is characterized by that between end shaft sleeve and rear shaft sleeve of the bit the front and rear drill blades are uniformly distributed, hinge and arranged, and centrifugal force produced by rotating drilling rod and pressing force subjected by end shaft sleeve can make the bit which is rotated for drilling hole be outwards expanded so as to obtain the goal of reaming hole.

Description

technical field [0001] The present invention relates to a drill bit used in civil engineering and corresponding technology, more specifically, it relates to a reaming drill bit used in civil engineering. Background technique [0002] The existing drill bits include alloy core bits, three-lobe drill bits, diamond drill bits, roller cone bits, steel grain drill bits, etc. The common feature of these bits is that they can only drill straight holes of equal diameter, that is, the diameter of the final hole is less than or equal to that of the opening. diameter. In the straight hole drilling of equal diameter, these drill bits are technically mature and widely used, and are currently the main tools for drilling structures such as anchor rods, anchor cables and piles. However, during anchor cable construction, if the end or middle of the anchor body can be enlarged to form an enlarged head anchor or an enlarged diameter anchor, the force is similar to that of the expansion screw,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/32
Inventor 陆观宏
Owner 陆观宏
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