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Prestressed sleeve self-lock anchor rod

A technology of prestressed tie rod and self-locking head, applied in sheet pile wall, foundation structure repair, construction, etc., can solve problems such as cracks, fatigue damage, etc., and achieve the effects of simple construction equipment, improved strength, and good fatigue resistance.

Inactive Publication Date: 2014-09-17
JIANGSU JINHAI NEW ENERGY TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially for anchor rods subjected to fatigue dynamics such as fan foundations, the brittle bonding of materials may cause cracks to occur and expand, resulting in fatigue damage

Method used

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  • Prestressed sleeve self-lock anchor rod
  • Prestressed sleeve self-lock anchor rod
  • Prestressed sleeve self-lock anchor rod

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] A prestressed casing self-locking head anchor rod, including a prestressed pull rod 1, a tool-type steel casing 2, a conical extrusion head 3, a six-petal enlarged self-locking head 4, a thermoplastic sheath 5, an upper nut 6, Thick backing plate 7, rock foundation 8, bolt hole 9, steel concrete cap 10, support 11, grouting material 12, stirrup 13, sealing plate 14, grouting pipe 15, threaded connection ring 16, fixed steel casing 17 1. Hydraulic tensioner 18, characterized in that the fixed steel casing 17 and the six-lobe enlarged self-locking head 4 are welded; the threaded connection ring 16 is welded with the fixed steel casing 17; the tool type steel casing 2 and the threaded connection ring 16 is threaded and penetrated into the prestressed tie rod 1, the upper end is thickened with a backing plate 7 and then the upper nut 6 is screwed on, and the lower e...

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Abstract

A prestressed sleeve self-lock anchor rod is characterized in that a fixing steel sleeve and a six-petal expansion self-lock head are welded, a threaded connection ring and the fixing steel sleeve are welded, a tool steel sleeve and the threaded connection ring are connected by threads, a prestressed pull rod penetrates, a thick cushion plate is additionally arranged on the upper end, an upper nut is screwed, and a truncated frustum extrusion head is additionally arranged at the lower end, then the whole set of anchor is formed; a thermal plastic sleeve sleeves an anchor rod and is sheathed on the whole anchor rod; the thermal plastic sleeve protects the prestressed pull rod from being rusted, enables the anchor rod to slide in concrete and is stable in anti-pulling performance; the fatigue stress amplitude of the anchor rod under the fatigue vibration pull force is about one fourth of a common anchor rod and is good in anti-fatigue performance. Rock holes are fully grouted to ensure that rock at the self-lock head is pressed from three directions, the strength is improved, the seepage force of grout is enhanced and the grout is greatly saved by designing seal rings, the applicable range of the anchor rod is enlarged by arranging the tool steel sleeve, and the economy aim for anchoring a deeper rock stratum can also be achieved.

Description

technical field [0001] The invention belongs to the technical field of existing concrete foundation reinforcement, and relates to a prestressed anchor rod with a self-locking head used in foundation engineering, in particular to a prestressed sleeve self-locking head anchor rod. Background technique [0002] Bolting is an efficient method of foundation uplift resistance on rocky foundations. The anchor rod is inserted into the rock drill hole, and after the cement mortar is injected, it becomes hard, and the anchoring force is generated by the gripping force between the anchor rod and the cement mortar, and between the cement mortar and the rock. Due to the inhomogeneity of rock and the brittleness of rock and mortar, its shear capacity varies greatly. Especially for anchor rods subjected to fatigue dynamics such as wind turbine foundations, the brittle bonding of materials may cause cracks to occur and expand, resulting in fatigue damage. Therefore, this brittle anchoring...

Claims

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Application Information

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IPC IPC(8): E02D5/74E02D37/00
Inventor 马逸鹄杨州沈卫明施辉陈晓辉
Owner JIANGSU JINHAI NEW ENERGY TECH
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