Two-purpose boring bar and hole-protecting casing soil anchor bolt boring technology

A drilling rod and hole forming technology, which is used in the installation of bolts, earthwork drilling, infrastructure engineering, etc., can solve the problems of increasing construction cost and project cost, low efficiency, complicated procedures, etc., and achieves fast hole drilling speed. , the effect of reducing costs and improving bearing capacity

Inactive Publication Date: 2007-01-03
中冶沈勘工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increased construction cost and engineering cost; Another method is to drill with the pipe protection hole, this method has complicated procedures and low efficiency

Method used

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  • Two-purpose boring bar and hole-protecting casing soil anchor bolt boring technology
  • Two-purpose boring bar and hole-protecting casing soil anchor bolt boring technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The soil anchor hole forming process in which the drill pipe doubles as the hole protection casing includes the following steps:

[0020] 1. To drill a hole, use a drilling tool with an auger bit (such as figure 1 As shown), the drilling tool with auger bit is composed of auger bit 1, female easy-reverse handle (or female plug-in handle) 2, male easy-reverse handle (or male plug-in handle) 3, drill pipe 4, drill pipe handle 5 and auger Drill bit 1 inner hole fixes locking sleeve 6 to form. The female easy-reverse handle 2 is fixedly connected to the rear end of the auger bit 1, and the male easy-reverse handle 3 is fixedly connected to the front end of the drill pipe; the male and female easy-reverse handles are screwed together, and the drill pipe 4 is composed of multiple inner flat drill pipes 4. A drill pipe receiver is connected in 5 phases.

[0021] 2. When the drilling tool with the auger bit is drilled to the set position, the anchor rod (cable) with the docki...

Embodiment 2

[0024] The process steps adopted in embodiment two are basically the same as in embodiment one, except that the anchor rod (cable) 12 is a steel rod or steel strand, and a grouting pipe 13 is installed in the inner hole of the anchor rod (cable) 12 .

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PUM

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Abstract

The present invention relates to an earth anchor rod hole-forming process whose drill pipe can be used as hole-protecting sleeve. Said hole-forming process includes hole-forming drilling process step, it utilizes the drilling tool with auger-drill head, and adopts wet drilling method or dry drilling method to make drilling operation. Said drilling tool with auger-drill head is composed of auger-drill head, tool joint box and pin, drill pipe and drill pipe joint. Said invention also provides the concrete steps of said hole-forming process and its operation method.

Description

(1) Technical field [0001] The invention belongs to the field of geotechnical engineering, and in particular relates to a hole-forming process of anchor rods (cables) in foundation pit support engineering. (2) Background technology [0002] In geotechnical engineering, the anchoring technology has been widely used, especially in the foundation pit slope protection project, the soil anchor (cable) technology occupies an important position. Effective means of lateral displacement. But for a long time, due to the complexity of the soil layers, most of the strata are easy to collapse and difficult to form holes, which brings great difficulties to the construction of anchor rods (cables). At present, there are two methods for anchor rod (cable) construction in collapsed hole strata: a kind of is a tubular anchor rod, and the drill rod doubles as an anchor rod to stay in the hole. Improve construction cost and project cost; Another kind of method is to drill with pipe protection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/74E21D20/00
Inventor 张成金王家伟王鸿祥陈日宏王笑二王建明
Owner 中冶沈勘工程技术有限公司
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