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Drilling rod belt-feeding type prestress anchor rod and use method thereof

A technology of prestressing and bolting, which is used in the installation of bolts, earth-moving drilling, sheet pile walls, etc. It can solve the problem that it cannot be used for the loose body of the rock crushing zone, the torque requirement of the drilling rig is large, and the steel strand is easy to twist, etc. problems, to achieve the effect of reducing torque requirements, accelerating construction speed, and improving shear resistance

Inactive Publication Date: 2013-09-04
沙正
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing grouting bolts generally have problems such as slow construction speed, large drilling rig torque requirements, small anchoring force per unit area, can not be used for loose rock mass fracture zone, and steel strands are easy to twist during screwing.

Method used

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  • Drilling rod belt-feeding type prestress anchor rod and use method thereof
  • Drilling rod belt-feeding type prestress anchor rod and use method thereof
  • Drilling rod belt-feeding type prestress anchor rod and use method thereof

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Embodiment Construction

[0036] Such as figure 1 Shown, a kind of drill rod brings in the type prestressed anchor rod, and it comprises drill point connecting pipe 2, the drill point 1 affixed to the end of described drill point connecting pipe 2, feather key sleeve 5 and anchor rod working piece support Cover 3; the support sleeve 3 of the anchor rod working part is fixedly socketed with the outer wall of the feather key sleeve 5; the drill point connecting pipe 2 is fixedly connected with the feather key sleeve 5.

[0037] see diagram 2-1 , Figure 2-2 and Figure 2-3 As shown, if the drill tip adopts a three-blade drill tip structure, the outer wall of the drill tip connecting pipe 2 in the present invention can be fixed with a spacer sleeve 4 .

[0038] see image 3 As shown, in order to facilitate the hanging of steel strands, the outer wall of the supporting sleeve 3 of the anchor rod working part of the present invention can be fixedly provided with steel strand hanging lugs 6 .

[0039] ...

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Abstract

The invention belongs to the field of building foundation ditch supporting systems, in particular relates to a drilling rod belt-feeding type prestress anchor rod and a use method thereof. The drilling rod belt-feeding type prestress anchor rod comprises a drilling tip connecting tube (2), a drilling tip (1), a sliding key sleeve (5) and an anchor rod working piece support sleeve (3), wherein the drilling tip (1) is fixedly connected with the end part of the drilling tip connecting tube (2), and the anchor rod working piece support sleeve (3) is fixedly sleeved on the outer wall of the sliding key sleeve (5) which is fixedly connected with the drilling tip connecting tube (2). The use method comprises the following steps of: (1) fixedly sleeving the anchor rod working piece on the anchor rod working piece support sleeve; (2) fixedly sleeving the anchor rod working piece support sleeve and the outer wall of the sliding key sleeve; (3) fixedly sleeving the drilling tip connecting tube on the inner wall of the sliding key sleeve; and (4) rotating the hollow drilling rod for drilling and grouting while driving the anchor rod working piece support sleeve into a soil body. The invention has the advantages of high construction speed, less torque requirement of a drilling machine and great anchorage force in a unit area and is suitable for breaking and loosening crushed zones of rock mass and smoothly screwing steel stranded wires in.

Description

technical field [0001] The invention belongs to the field of rock-soil anchorage systems, and in particular relates to a drill-pipe-introduced prestressed anchor and a method for using the same. Background technique [0002] With the rapid development of my country's economic construction, a large number of large and super high-rise buildings have emerged in various cities. So far, there have been dozens of super high-rise buildings with a height of more than 200 meters across the country. The foundation pit project presents the characteristics of compact site, short engineering distance, deeper and deeper foundation, and larger and larger scale and size. Deep foundation construction is an extremely important link in the construction of large and high-rise buildings, and the technology of deep foundation pit support structure is undoubtedly the key to ensure the smooth construction of deep foundations. [0003] The design and construction of foundation pit support should c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D21/00E21D20/00E02D5/74
Inventor 张丙吉杨子东孙平平沙正
Owner 沙正
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