Construction method for improving pulling resistance of twisted steel anchor rod

A technology of threaded steel bars and construction methods, applied in excavation, infrastructure engineering, sheet pile walls, etc., can solve problems such as labor, time, waste of resources, etc., and achieve the effects of preventing displacement, speeding up construction progress, and reducing construction costs.

Active Publication Date: 2021-03-02
中铁十七局集团第五工程有限公司
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The present invention provides a construction method for improving the pull-out performance of threaded steel anchors in order to solve the problem that the length of the anchorage section exceeds the actual requirement when the existing construction method of threaded steel anchors is used, resulting in waste of resources, labor and time.

Method used

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  • Construction method for improving pulling resistance of twisted steel anchor rod
  • Construction method for improving pulling resistance of twisted steel anchor rod

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Embodiment Construction

[0024] A construction method for improving the pullout performance of a threaded steel bar anchor, said method comprising the following steps:

[0025] S1: Open several vertical rib column grooves vertically on the surrounding rock wall, and remove the rock mass in each vertical rib column groove;

[0026] S2: Drill several anchor holes on the bottom wall of each vertical rib column groove, and clean each anchor hole;

[0027] S3: Install several pullout resistance blocks on the anchoring section of each threaded steel bar anchor; the installation process is realized by the following steps: a. screw the sleeve on the anchoring section of the threaded steel bar anchor; The barrel includes a straight barrel at the head and a tapered barrel connected end to end with the straight barrel, and the diameter of the head end of the tapered barrel is smaller than the diameter of the tail end; b. The opening on the sleeve is installed downwards and the opening end has an outer Threaded ...

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Abstract

The invention particularly relates to a construction method for improving the anti-pulling performance of a twisted steel anchor rod. The problems that when an existing construction method of the twisted steel anchor rod is applied, the length of an anchoring section exceeds the actual requirement by a large amount, resources are wasted, and labor and time are wasted are solved. The construction method for improving the anti-pulling performance of the twisted steel anchor rod comprises the following steps that S1, a plurality of vertical rib column grooves are vertically formed in the wall ofsurrounding rock; S2, a plurality of anchor rod holes are drilled in the bottom wall of each vertical rib column groove; S3, a plurality of anti-pulling resistance blocks are installed on the anchoring section of each twisted steel anchor rod; S4, the twisted steel anchor rods are placed into the anchor rod holes, and cement mortar is poured into the anchor rod holes; S5, steel bars of vertical rib columns and panels are bound, formwork erecting is conducted, and concrete is poured; and S6, the ends of the twisted steel anchor rods are sealed and anchored on the outer sides of the panels. Theconstruction cost is reduced, the construction progress is accelerated, and the method can be suitable for stone excavation high slope stability protection engineering and can be applied and popularized in similar engineering.

Description

technical field [0001] The invention relates to a construction method for stonework excavation of a high slope stability protection project, in particular to a construction method for improving the pull-out performance of threaded steel bar anchor rods. Background technique [0002] With the expansion of construction scale and the advancement of civil engineering technology, foundation pits continue to deepen and steep slopes continue to increase. In recent years, new support structures that use anchor rods (or anchor cables) to provide balance force have been widely used, such as anchor retaining structures. Walls are one of them. At present, because the anchoring pullout resistance of threaded steel bars is significantly higher than that of ordinary round steel bars, and the deformation of threaded steel bars is smaller than that of steel wire ropes, and it is more economical, so in anchor retaining wall projects, hot-rolled threaded steel bars are generally used directly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/74E02D17/20
CPCE02D5/74E02D17/20
Inventor 杨思琪孙义佳邹华徐彦军董琪
Owner 中铁十七局集团第五工程有限公司
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