Fully-recycled body expanding anchor rod and construction method for anchoring ground using same

A technology of body expansion and anchor rods, which is applied in excavation, foundation structure engineering, sheet pile walls, etc., can solve the problems of unfavorable saving of steel, cement, energy saving and emission reduction, increase of underground obstacles and construction costs, waste of anchor reinforcement materials, etc. Achieve the effects of energy saving, emission reduction, underground pollution reduction, and improvement of anchorage strength

Active Publication Date: 2012-10-17
CHINA JINGYE ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. In strata with complex engineering geological conditions, such as anchor rods (cables) installed in soft and loose strata, due to factors such as low friction in the anchorage section, the unit anchorage bearing capacity is low and the deformation is large. In the traditional anchoring process, the length of the unit anchor (cable) is usually increased or the pipe is drilled to solve such problems, resulting in a sharp increase in the cost of hole formation and a waste of anchor reinforcement materials, which is not conducive to saving steel, cement and Energy conservation
[0004] 2. The anchor rods in the temporary support system have no effect after the service period. As a temporary support structure, the pile-anchor system is widely used in urban construction and municipal foundation pit engineering. These are used for support After the end of the service period, the anchor bolts will be left underground in the future construction site and cannot be recycled, causing serious underground pollutio

Method used

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  • Fully-recycled body expanding anchor rod and construction method for anchoring ground using same
  • Fully-recycled body expanding anchor rod and construction method for anchoring ground using same
  • Fully-recycled body expanding anchor rod and construction method for anchoring ground using same

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Example Embodiment

[0039] like figure 1 As shown, the fully recyclable expansion anchor of the present invention includes a main frame 1, a sealed covering bag 2, an unbonded steel strand 3, and a guide cover 4, such as Figure 4 As shown, the main frame 1 includes a grouting core pipe 11, an upper assembly 12 arranged on the upper part of the grouting core pipe 11, a lower assembly 13 arranged on the lower part of the grouting core pipe 11, wound on the grouting core pipe 11 and upper, The lower two ends are respectively fixed on the spiral stirrups 14 on the upper and lower assemblies 12, 13, such as Figure 5 , 6 As shown, the upper assembly 12 includes an integrally formed upper cover plate 121 and an upper sleeve 122, the upper sleeve 122 is arranged below the upper cover plate 121, the bottom surface of the upper cover plate 121 is provided with a central hole 120, and the central hole is provided with threads. Two fixed jaws 123 are respectively provided on both sides of the outer wall ...

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Abstract

The invention provides a fully-recycled body expanding anchor rod and a construction method for anchoring ground using the same. The fully-recycled body expanding anchor rod comprises a main machine rack, a sealed cladding bag and a non-adhesive steel strand, wherein the main machine rack comprises a grouting core pipe, an upper assembly, a lower assembly and a spiral stirrup; the top of the grouting core pipe is connected with a grouting recycled pipe, and the bottom of the grouting core pipe is provided with a one-way valve; the sealed cladding bag is sleeved outside the grouting core pipe and the spiral stirrup of the main machine rack; the both ends of the sealed cladding bag are respectively fixed on the upper assembly and the lower assembly; the non-adhesive steel strand is wounded outside the sealed cladding bag; the both ends of the non-adhesive steel strand extend outside the grouting core pipe; the middle part of the non-adhesive steel strand is adhered to the bottom of the lower assembly; and the positions of the non-adhesive steel strand, which are close to the upper assembly, are slidably connected with the both sides of the outer wall of the upper assembly. With the adoption of the fully-recycled body expanding anchor rod and the construction method thereof, the grouting recycled pipe and steel wires in the non-adhesive steel strand of an anchor beam body can be entirely recycled and reused, so that the construction cost is reduced, and the pollution of the underground soil can be reduced. Thus, the fully-recycled body expanding anchor rod and the construction method are beneficial to energy conversation and emission reduction.

Description

technical field [0001] The invention relates to an anchor rod used in a rock and soil temporary anchoring project in the field of civil engineering and a construction method thereof. Background technique [0002] In the field of geotechnical engineering, in the temporary anchoring projects for excavation and support of various temporary slopes and deep foundation pits, it is necessary to use prestressed anchorage technology to keep the side walls of slopes and foundation pits stable. At present, a large number of traditional full-length and equal-diameter anchoring techniques are used to construct foundation pit support projects. This type of traditional anchoring method has the following two problems: [0003] 1. In strata with complex engineering geological conditions, such as anchor rods (cables) installed in soft and loose strata, due to factors such as low friction in the anchorage section, the unit anchorage bearing capacity is low and the deformation is large. In the...

Claims

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Application Information

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Owner CHINA JINGYE ENG
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