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Preparation and tensioning method of composite rib material

A composite reinforcement and tensioning technology, applied in sheet pile wall, construction, infrastructure engineering and other directions, can solve the problem of difficult basalt fiber reinforcement, and achieve the effects of good corrosion resistance, convenient processing and light weight

Inactive Publication Date: 2021-01-05
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a preparation and tensioning method of composite reinforcement to solve the problem that basalt fiber reinforcement is difficult to directly use existing metal bolt tensioning equipment for tensioning and reliable anchoring

Method used

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  • Preparation and tensioning method of composite rib material
  • Preparation and tensioning method of composite rib material
  • Preparation and tensioning method of composite rib material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for preparing composite reinforcement, comprising basalt fiber reinforcement 1 and steel sleeves 3 arranged at both ends of the basalt fiber reinforcement 1, the steel sleeve 3 adopts 45 # Seamless steel pipe preparation, the inner diameter of the steel sleeve 3 is 13mm, the outer diameter is 15mm, the inner diameter of the steel sleeve 3 is equal to the outer diameter of the basalt fiber reinforcement 1, the specific preparation method of the composite reinforcement and the use of the composite reinforcement The specific method of stretching is: laser cutting the steel sleeve 3 in half along the axis into a two-petal steel sleeve 12, a three-petal steel sleeve 13, and a four-petal steel sleeve 14, and the width of the cutting seam is different. Less than 0.2mm, the steel casing 3 after cutting is relying on the impact force of high-speed sprayed steel grit to form a uniformly distributed rough surface on the inner and outer surfaces to increase friction, and us...

Embodiment 2

[0029] The untreated basalt fiber reinforcement 1 with a diameter of 13 mm was compared with the composite reinforcement of the two-lobed steel casing 12 with a longitudinal slit width of 1 mm prepared in Example 1 with the same diameter through tension experiments, wherein the untreated The basalt fiber reinforcement 1 directly stretches, and when the stress reaches 301MPa, the basalt fiber reinforcement 1 at 5 places of the anchor clip is cut; when the composite reinforcement of the two-lobed steel sleeve 12 prepared in the present invention is carried out in the tension test , when the stress reached 797MPa, it was broken from the middle of the composite reinforcement, which shows that the protection of the two-petal steel pipe sleeve 12 can effectively prevent the basalt fiber reinforcement 1 at the anchor clip 5 from being sheared during the tensioning process.

Embodiment 3

[0031] The anchor clips 5 were respectively installed on the middle part and the end of the two-petal steel casing 12 of the composite reinforcement prepared in Example 2. After the tension experiment was compared, when the stress reached 642 MPa, the anchor clip was installed at the end. The two-petal steel casing 12 of sheet 5 is degummed and slipped, but the two-petal steel casing 12 with anchor clip 5 installed in the middle does not appear to be degummed and slipped.

[0032] Implementation column 4

[0033] Respectively will adopt the model as 20 # Seamless steel pipe and embodiment 1 adopt model is 45 # The two-petal steel casing 12 with a longitudinal slit width of 1mm prepared from seamless steel pipes was compared with the tension test of the composite reinforcement prepared by the method in Example 1 through the anchor tension equipment. When the stress reached 602 MPa, due to 20 # The hardness of the steel casing is too low, and the steel casing and the basalt fi...

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Abstract

The invention provides a preparation method of a composite rib material. The composite rib material comprises a basalt fiber rib and steel sleeves arranged at the two ends of the basalt fiber rib. Thepreparation method comprises the specific steps that the steel sleeves are cut in a half-and-half mode along the axis, sand blasting treatment is conducted, then epoxy resin is poured to bond the steel sleeves and the basalt fiber rib, a plurality of hose clamps are arranged on the peripheries of the steel sleeves at equal intervals after pouring, screws are screwed down to conduct pressure maintenance on the hose clamps, and the hose clamps are detached after maintenance. A tensioning method of the composite rib material comprises the steps that after the prepared composite rib material stretches into a center hole jack of tensioning anchoring equipment, a steel base plate and an anchorage device are installed on the two sides of the center hole jack, an oil pump is started after anchorage device clamping pieces are installed in the middles of the steel sleeves at the two ends of the composite rib material, oil pressure is transmitted to the center hole jack through a jack oil inletand outlet pipe via a jack oil inlet and outlet port, and a small amount of oil needs to be loaded step by step during tensioning so that the situation that the composite rib material is suddenly damaged due to too fast loading can be prevented. The composite rib material is simple in structure, convenient to machine and construct and capable of being used for engineering such as dangerous rock mass supporting and bridge structures.

Description

technical field [0001] The invention relates to the field of non-metal bolt support, in particular to a preparation method of a composite reinforcement and a tensioning method thereof. Background technique [0002] Anchor is the most basic part of reservoir bank slope support engineering. At present, metal anchors are widely used in the support engineering of the bank slope of the reservoir. The rainfall and the rise and fall of the water level in the reservoir area cause the metal anchors to corrode, resulting in the prestressed metal anchors acting on the rock and soil of the bank slope. The loss of prestress even causes the fracture of the metal anchor rod, which seriously threatens the stability of the rock and soil mass of the reservoir bank slope and the safety of life and property of the people in the reservoir area. [0003] Basalt fiber reinforcement is a new type of fiber material, which belongs to inorganic non-metallic materials. It is made by drawing wire in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/74E02D5/76
CPCE02D5/74E02D5/76E02D2250/0046E02D2300/0017E02D2300/0029E02D2300/0051E02D2600/30
Inventor 杜志刚代贞伟郭进军王朝秦游鹏司马莉孔庆丹
Owner LUOYANG INST OF SCI & TECH
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