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Hydraulic anchor rod prestressed loss-stop device

A prestressed, hydraulic technology, applied in construction, sheet pile wall, foundation structure engineering, etc., to achieve the effect of convenient construction, simple structure and simple operation

Pending Publication Date: 2019-07-12
河北建科唐秦建筑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a hydraulic bolt prestress stop loss device, which is economical and practical, easy to operate, and can avoid prestress loss and multi-bundle damage after the bolt is stretched and locked. The problem of unbalanced force on the steel strand

Method used

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Embodiment Construction

[0018] Such as figure 1 , figure 2 , image 3 , Figure 4 As shown, the hydraulic bolt prestressed stop loss device of the present invention has a manual hydraulic pump (hand-operated hydraulic pump) 1, a cylinder (cylinder body) 2, a piston 3, a piston rod 3', a compression spring (for oil discharge) Back-moving spring) 4, positioning sleeve 5, several sleeve pipes 7 corresponding to steel strands for steel strands to pass through its center hole 6 one by one. The manual hydraulic pump 1 has an oil delivery pipe 101 , a pressure relief valve 102 , an oil inlet hole (oil injection hole) and an exhaust valve 103 . On the base 201 of the cylinder 2, on the piston 3 and on the piston rod 3', there are several piercing holes for installing the sleeves along the axial direction of the piston, and each of the sleeves 7 passes through the corresponding sleeves at the same time. Corresponding to the piercing holes on the base of the cylinder and the piercing holes on the piston a...

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PUM

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Abstract

The invention provides a hydraulic anchor rod prestressed loss-stop device. The hydraulic anchor rod prestressed loss-stop device comprises a manual hydraulic pump, a cylinder barrel, a piston, a piston rod, a compressed spring, a positioning sleeve and a plurality of casing pipes used for allowing steel strands to penetrate through center holes of the casing pipes. Each casing pipe simultaneouslypenetrates through a penetrating-in hole in a base of the cylinder barrel, a penetrating-in hole in the piston and a penetrating-in hole in the piston rod, each casing pipe is fixedly connected withthe base of the cylinder barrel, the piston and the piston rod are mounted on the multiple casing pipes in a sleeving mode and are in clearance fit with the casing pipes, the compressed spring is mounted on the outer circumferential face of the piston rod in a sleeving mode, one end of the compressed spring is limited by the piston, the other end of the compressed spring is limited by the positioning sleeve, the positioning sleeve is located between the inner wall of the cylinder barrel and the piston rod and fixed to the inner wall of the cylinder barrel, a shaft shoulder notch, namely, a variable section notch, for limiting an engineering anchorage device is formed in the outer side end of the cylinder barrel, and an oil delivery opening of an oil delivery pipe of the manual hydraulic pump is connected with an oil nozzle at the bottom end of the side face of the cylinder barrel. The hydraulic anchor rod prestressed loss-stop device is economic, practical and easy to operate, and theproblems of prestress loss after tensioning and locking of an anchor rod and unbalanced force-bearing of the multiple steel strands can be avoided.

Description

technical field [0001] The invention relates to a bolt prestressed stop loss device, in particular to a hydraulic anchor bolt prestress stop loss device, which is a prestressed bolt tension locking device used in the fields of foundation pit support and rock and soil slope reinforcement . Background technique [0002] At present, OVM series self-locking anchors are generally used in the support of foundation pits. Because of the tension locking process, the prestress of the anchor rods after tension locking is lost to varying degrees, and it is difficult to avoid. The locking force cannot reach the tension locking value required by the design, which brings serious safety hazards to the foundation pit. [0003] The tensioning and locking process of the anchor rod is: after the equipment and tools are installed, the jack applies pressure, the anchor rod moves outward (elastic deformation), and the engineering anchor clip will move outward with the anchor rod. The engineering...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/74
CPCE02D5/74E02D2250/0046
Inventor 王维玉窦炳康李仕良赵拓王利广曹海勃窦桂群刘兰豹刘丁裴颖颖
Owner 河北建科唐秦建筑科技有限公司
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