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 o

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

Examples

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Comparison scheme
Effect test

Example Embodiment

[0040]Embodiment 1. A construction device for a high-pressure jet expansion head anchor rod, combined with Figure 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 front end of the high-pressure pipe 2 is communicated with the high-pressure pump 4 connected to the back end of the high-pressure pipe 2 through the hollow passage of the high-pressure pipe. The back end of the high-pressure pipe 2 and the high-pressure pump 4 are connected through a hose 4a; the drilling rig 3 is supported and passed through the power head 3a Control the high-pressure pipe 2 to operate.

[0041] The nozzle can be a hollow column, cone or hemisphere, one end has a joint that is compatible with and communicated with the high-pressure pipe, generally speaking, it can be connected by a thread. There are 1 or 2 nozzles on the nozzle, and the nozzles are preferably arranged in a n...

Example Embodiment

[0044] The second embodiment is a construction method of a high-pressure jet expansion head anchor rod. The basic process steps are:

[0045] Drilling: Use a drill to drill to the designed depth to form anchor holes. In this step, a drill rod with a drill bit can be used for drilling, or a casing with a casing drill bit can be used for drilling. After the anchor hole is formed, the casing is withdrawn an appropriate distance to leave a position for the enlarged head. The casing bit can be a ring bit with the same diameter as the casing, or it can be formed by welding a number of alloy blades on the periphery of the front end of the casing. The drilling rig for controlling casing drilling can be an ordinary drilling rig or a dual-power head drilling rig.

[0046] Reaming: Use a drill to control the high-pressure pipe to place 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 nozzle is connected to the hig...

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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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