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Electromagnetic anchor pipe structure and magnetic convergence grouting construction process

An anchor pipe and electromagnetic technology, applied in infrastructure engineering, electromagnets, electromagnets without armatures, etc., can solve the problem that the slurry cannot be completely filled

Active Publication Date: 2021-09-10
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, provide an electromagnetic anchor pipe structure with simple structure and convenient operation and magnetic convergence grouting construction technology, to improve the existing problem of the density of the slurry at the anchor head, and The grout cannot be completely filled during grouting in the upside-down hole, and the grout and water are miscible during underwater grouting, so as to achieve the effect of increasing the density of the grout at the anchor head, anchoring performance, and enhancing the ultimate pullout resistance of the anchor bolt.

Method used

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  • Electromagnetic anchor pipe structure and magnetic convergence grouting construction process
  • Electromagnetic anchor pipe structure and magnetic convergence grouting construction process
  • Electromagnetic anchor pipe structure and magnetic convergence grouting construction process

Examples

Experimental program
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Effect test

Embodiment 1

[0074] see Figure 1-6 , an electromagnetic anchor pipe structure, which includes an anchor pipe 4, the interior of the anchor pipe 4 is provided with electromagnets 3 in a variety of different arrangements, and the electromagnet 3 cooperates with the magnetic mortar around the anchor pipe 4 , and adsorb it; the interior of the anchor pipe 4 is filled with cooling oil for cooling the electromagnet 3; when grouting, the top of the anchor pipe 4 is fixed with a high-tightness three-hole seal Plug 13, the three-hole sealing plug 13 is a trapezoidal structure, the lower end is provided with a threaded opening, and the lower end of the three-hole sealing plug is provided with a threaded plug body and a sealing ring extending downward and threaded with the upper end of the inner wall of the anchor pipe 4; The hole sealing plug 13 is provided with a cooling oil injection hole 13-1 for injecting cooling oil, a cooling oil injection hole 13-2 for leading out cooling oil, and a wire hol...

Embodiment 2

[0086] Using any one of the electromagnetic anchor pipe structures to carry out the magnetic convergence grouting construction process includes the following steps:

[0087] When the electromagnetic anchor pipe is used to increase the anchoring force of the anchor head, the construction steps are:

[0088] Step1.1: After the anchor hole is drilled, insert the electromagnetic anchor pipe into the hole;

[0089] Step1.2: Configure the cement-based magnetic convergence slurry, the water-cement ratio is 0.4-0.7, the amount of fly ash is 15%-40% of the mass of cement, and the amount of magnetic powder is 25%-55% of the mass of cement , the magnetic powder dispersant is 8%-15% of the magnetic powder, the flocculant is 4%-7% of the cement mass, the water reducing agent is 3%-6% of the cement mass, and the defoamer is 0.5g-2.0g per 500g slurry The proportion of adding, rust inhibitor 12%-20%, water-soluble silicone oil is 5%-10% of magnetic powder, stir evenly;

[0090] Step1.3: Inj...

Embodiment 3

[0092] In the environment of vertical hole grouting, the construction steps of using electromagnetic anchor pipe and cement-based magnetic convergence grout are as follows:

[0093] Step2.1: Measure the size of the wading anchor hole before the actual construction;

[0094] Step2.2; After the anchor hole is drilled, insert the anchor pipe 4;

[0095] Step2.3: Configure the cement-based magnetic convergence slurry, the water-cement ratio is 0.4-0.7, the amount of fly ash is 15%-40% of the mass of cement, and the amount of magnetic powder is 25%-55% of the mass of cement , the magnetic powder dispersant is 8%-15% of the magnetic powder, the flocculant is 4%-7% of the cement mass, the water reducing agent is 3%-6% of the cement mass, and the defoamer is 0.5g-2.0g per 500g slurry The proportion of adding, rust inhibitor 12%-20%, water-soluble silicone oil is 5%-10% of the magnetic powder.

[0096] Step2.4: Inject the configured cement-based magnetic convergence grout into the ho...

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Abstract

The invention provides an electromagnetic anchor pipe structure and a magnetic convergence grouting construction process. The electromagnetic anchor pipe structure comprises an anchor pipe, wherein electromagnets are arranged in the anchor pipe in various different arrangement modes, and the electromagnets are matched with magnetic mortar around the anchor pipe and adsorb the magnetic mortar; the anchor pipe is filled with cooling oil for cooling the electromagnets; during grouting, a three-hole sealing plug with high sealing performance is fixed at the top end of the anchor pipe in a matched mode; and during upward hole grouting, a two-hole sealing plug with high sealing performance is fixed at the top end of the anchor pipe in a matched mode. According to the electromagnetic anchor pipe structure and the magnetic convergence grouting construction process, the problems that the compactness of slurry at an existing anchor head is low, the slurry cannot be completely filled during upward hole grouting, and the slurry and water are mutually soluble during underwater grouting are solved, and the effects that the compactness of the slurry at the anchor head is increased, the anchoring performance is improved, and the ultimate pulling resistance of an anchor rod is enhanced are achieved.

Description

technical field [0001] The invention relates to an electromagnetic anchor pipe structure and a magnetic convergence grouting construction technology, and belongs to the technical field of bolt reinforcement in geotechnical engineering. Background technique [0002] In recent years, a lot of research has been done on the improvement of traditional anchor rods and anchor heads in the field of geotechnical engineering at home and abroad. With the rapid development of geotechnical engineering, anchoring technology has become an important branch. It is widely used in engineering fields such as slope protection, foundation pit, tunnel, dam body, wharf, subway, underground space engineering and tension foundation. [0003] At present, the widely used anchor rods are hollow steel pipes and reinforced mortar anchor rods, which are only bonded by cement mortar. This method can be widely used when there are few gaps in ordinary soil layers. There are pipe-seam anchors and self-rotati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/74E02D15/06H01F7/20H01F6/04
CPCE02D5/74E02D15/06H01F7/202H01F6/04E02D2600/30
Inventor 刘杰李洪亚朱晓涵李彦蓉陈姝婷冯博韬李运舟孙荣琪宋瑞
Owner CHINA THREE GORGES UNIV
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