Construction method of expanded-head prestressed concrete anchor rod

A bolt construction and prestressing technology, which is applied in the direction of foundation structure engineering, sheet pile walls, protective devices, etc., can solve problems that do not involve construction methods, etc.

Inactive Publication Date: 2020-08-25
JIANGSU GREEN RIVER ENVIRONMENTAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it does not involve the construction method of enlarged

Method used

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  • Construction method of expanded-head prestressed concrete anchor rod
  • Construction method of expanded-head prestressed concrete anchor rod
  • Construction method of expanded-head prestressed concrete anchor rod

Examples

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Embodiment Construction

[0062] Such as Figure 2-3 Shown: steel bar clamp (the simplest way is composed of fixed nut 8, force clamp 9, inner penetrating oil cylinder 6 and fixed nut 8), steel bar (main bar) 1, expanding head 2, bracket plate 3, lock nut 4. Anchor rod casting body 5, inner penetrating oil cylinder 6, bracket 7, fixing nut 8, force clamp 9, force applying machine 10. The support plate 3 is placed on the reinforced soil. The pipe sleeve 14 can be an outer coat of an unbonded steel bar oiled layer, a mesh steel bar 15 . Pile end prestressed anchor plate (anchor bracket backing plate) 3. Apply prestressed pile end elevation 21. Free (ordinary) section bore hole diameter 16, pouring port 17, connection point 18 of mesh reinforcement 15 and pile end prestressed anchor plate (support backing plate) 3. Stress Gauge11. The bracket plate 3 is placed on the reinforced soil body 12, and the surfaces of various locking brackets 3-1 are provided with steel bar perforations.

[0063] Figure 2...

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Abstract

The invention discloses a construction method of an expanded-head prestressed concrete anchor rod. The anchor rod is formed by pouring and solidifying an anchor rod framework system and prestressed concrete. The construction method comprises the specific construction implementation steps of conducting drilling and positioning; drilling a hole to a designed depth, carrying out jet grouting or mechanical reaming construction to form a hole, and lowering a pull rod, namely a main rib, of the anchor rod and an expanded head framework or a fixed-diameter anchor head framework; after the pull rod, namely the main rib, of the anchor rod, an expanded head and the expanded head framework are in place, expanding the expanded head to the designed size through an expansion mechanism, and then formingthe pouring concrete on the expanded head, namely an expansion body section and a non-expansion body section until the rated strength required by design and specifications are reached; enabling the pull rod, namely the main rib, in the anchor rod to use a device and method capable of applying prestress to apply prestress to the main rib; applying the prestress required by the design and specifications, conducting locking after operation is completed, and then removing the to-be-removed equipment device for applying the prestress; and enabling a whole part of the anchor rod to be composed of the poured concrete and an anchor rod framework body.

Description

technical field [0001] The invention relates to a fixed diameter or enlarged head prestressed concrete anchor and its construction method. It is an anchor rod application device for overcoming the elastic deformation of the free section of the anti-floating fixed diameter or enlarged head anchor rod body. Stressed concrete anchor pile and construction method (post-tensioning method). Background technique [0002] The applicant's CN2020103929335 is a post-tensioning prestressing device for anchor rods, which includes a force applying machine 10, a bracket or / and a bracket plate, a steel bar holder, a bracket or a bracket plate in the center of which the upper end steel bar of the anchor rod ( The hole through which the main reinforcement) passes; the lower end of the anchor rod reinforcement is fixed in the borehole of the anchor rod stratum or rock formation, and the upper end reinforcement is clamped by the reinforcement holder after the hole passed through, and is applied ...

Claims

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Application Information

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IPC IPC(8): E02D5/74E02D31/12
CPCE02D5/74E02D31/12
Inventor 王林陶刚王军刘松梅
Owner JIANGSU GREEN RIVER ENVIRONMENTAL TECH CO LTD
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