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Construction method of high pressure jet expansion head anchor rod and its device

A technology of high-pressure spraying and construction method, applied in the direction of infrastructure engineering, construction, sheet pile wall, etc., can solve the problems of complicated operation, increased construction equipment, difficult construction, etc., and achieve the effect of reducing cost and simplifying equipment

Inactive Publication Date: 2008-02-27
曾庆义
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual construction, it is found that due to the need to use an additional reaming device, the construction equipment increases, and the support and operation of the reaming device are more difficult. If it is designed and installed separately, it will increase the cost and make the Complicated operation
In addition, when the formation conditions are poor, such as soft soil, silt or sandy soil, or the formation changes greatly and the structure is unstable, it is easy to cause the collapse of the anchor hole during the process of high-pressure jet reaming, resulting in construction failure. difficulty

Method used

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  • Construction method of high pressure jet expansion head anchor rod and its device

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Embodiment 1

[0040]Embodiment 1. A construction device for a high-pressure injection expanding head bolt, in conjunction with FIG. 1 , includes a nozzle 1, a high-pressure pipe 2, a drilling rig 3 and a high-pressure pump 4. The nozzle 1 is provided with a radial nozzle 1a, and the nozzle is installed on the The front end of the high-pressure pipe 2 communicates with the high-pressure pump 4 connected to the rear end of the high-pressure pipe 2 through the hollow channel of the high-pressure pipe. Control the high pressure pipe 2 to operate.

[0041] The spray head can be a hollow columnar, conical or hemispherical object, and one end has a joint that is adapted and communicated with the high-pressure pipe, generally speaking, it can be threaded. There are one or two nozzles on the nozzle, and the nozzles are preferably arranged radially or radially symmetrically in a normal plane of the nozzle. The nozzle is a small hole distributed on the side wall of the nozzle, with a diameter of 0.5-...

Embodiment 2

[0044] Embodiment 2. A construction method of a high-pressure injection expanding head bolt. Its basic process steps are:

[0045] Drilling: Use a drilling rig to drill to the designed depth to form anchor holes. This step can be drilled with a drill pipe equipped with a drill bit, or a casing with a casing drill bit installed. After the anchor hole is formed, the casing is withdrawn by an appropriate distance to leave a place for setting the expansion head. The casing drill bit can be a circular drill bit with a diameter equivalent to the casing pipe, or it can be formed by welding several alloy blades on the periphery of the front end of the casing pipe. The drilling rig for controlling casing drilling can be either a common drilling rig or a dual power head drilling rig.

[0046] Reaming: Use a drilling rig to control the high-pressure pipe, put the nozzle installed at the front end of the high-pressure pipe into the anchor hole where the expansion head is to be set, the ...

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Abstract

The present invention relates to a construction method of anchor rod by using high-pressure to jet expanded head. It is characterized by that after the anchor rod is hole-formed, it utilizes drill machine to control and operate high-pressure pipe to jet and ream the expanded head position of anchor hole, then places anchor downward and injects the slurry.

Description

【Technical field】 [0001] The invention relates to a construction method of an enlarged head anchor rod, in particular to a method and a device for constructing an enlarged head anchor rod by using high-pressure liquid jet reaming. 【Background technique】 [0002] Anchor rods are widely used in foundation pit support, slope support, landslide control and building anti-floating engineering. Existing rock bolt construction technology generally is to form a hole with a drilling rig (comprising various special rock bolt machines) earlier, then the anchor rod body is put into the hole, then grouting in the hole, the anchor rod can bear the tensile force after the grout is solidified. Anchor holes drilled with a drilling rig are generally cylindrical, with a small diameter, a small pullout resistance of the anchor rod, and a large deformation. Expanding the head bolt is undoubtedly the best way to increase the pullout force and reduce the displacement. However, the realization of ...

Claims

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Application Information

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IPC IPC(8): E02D5/76E02D7/24
Inventor 曾庆义熊磊
Owner 曾庆义
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