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Anchor rod structure and construction method thereof

A construction method and bolt technology, which is applied in the direction of foundation structure engineering, excavation, sheet pile walls, etc., can solve the problems that the preset anchor cable position deviates from the design position, is prone to settlement, affects the support effect, etc., and achieves support Good effect, increased rigidity and anti-deformation ability, accurate positioning effect

Active Publication Date: 2019-11-05
北京中润宝成工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The above-mentioned existing technical solutions have the following defects: after the high-pressure rotary spraying cement slurry is completed, the surrounding soil becomes weaker due to the cutting of the surrounding soil by the rotary spraying, and the anchor cable is in a weak state before the initial setting of the cement slurry. In the soil, the end of the anchor cable with the anchor plate is prone to settlement, causing the preset anchor cable position to deviate from the design position, affecting the support effect

Method used

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  • Anchor rod structure and construction method thereof
  • Anchor rod structure and construction method thereof

Examples

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Effect test

Embodiment 1

[0046] refer to figure 1 , is a kind of anchor rod structure disclosed in the present invention, comprises anchor cable 1, and anchor cable 1 is made of steel strand, is provided with anchor plate 2 at the end of anchor cable 1 inserted in the anchor hole, and anchor plate 2 is made of steel In order to increase the anchoring capacity with the slope, at least three anchor cables 1 are pierced on one anchor disk 2. In this embodiment, three anchor cables 1 are selected, and the anchor cables 1 pass through the anchor disk 2 and are fixed by extrusion anchors. On anchor plate 2. An anti-sinking part 3 for preventing the anchor cable 1 from sinking is arranged on the side of the anchor plate 2 away from the anchor cable 1 . One end of the anti-sinking component 3 is connected to the anchor plate 2 , and the other end is provided with a pointed cone portion 31 . By setting the anti-sinking part 3 at the front end of the anchor cable 1, setting an ultra-deep section for placing t...

Embodiment 2

[0052] refer to figure 2 , the difference from Embodiment 1 is that the anti-sinking part 3 includes a cylinder 33 with the same diameter as the anchor plate 2 and a tapered portion 31 fixed at one end of the cylinder 33, and the cylinder 33 is far away from the tapered portion 31. One end is welded on the anchor plate 2 after the anchor cable 1 and the anchor plate 2 are fixed, and the tapered portion 31 is conical and fixed on the cylinder 33 by welding. A slurry outlet 331 is opened on the side wall of the cylinder 33 . By arranging the cylinder 33 and the conical pointed cone portion 31, the rigidity and deformation resistance of the anti-sinking part 3 are increased to prevent the anti-sinking part 3 from being damaged due to the deep anchor hole when the anchor cable 1 is pushed into the anchor hole. The resistance is large, and the problem of deformation occurs. At the same time, through the grout hole 331, the rotary sprayed cement slurry can completely fill the ult...

Embodiment 3

[0054] A kind of bolt structure construction method, comprises the following steps:

[0055] S1. Anchor hole positioning: After excavation, the wall of the foundation pit has been corrected and sprayed with anchors. According to the elevation and horizontal spacing required by the design, use the total station to set out the position of the anchor hole on the wall of the foundation pit, and mark the anchor hole .

[0056] S2. Drilling: Use a special anchor drill to align the placed holes, adjust the angle according to the designed angle of the anchor hole, select a hard alloy high-pressure rotary drill bit, and set multiple nozzles on the side of the drill bit for high-pressure rotary rotary drilling process , start drilling, and the depth of the hole is drilled until it is 30-100 cm deeper than the design hole depth. In the present embodiment, the ultra-deep section is selected as 50 cm, and the ultra-deep section of the anchor hole is used to place the anti-sinking part 3. ...

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Abstract

The invention relates to an anchor rod structure, and relates to the technical field of anchor rod construction. The anchor rod structure comprises an anchor cable and an anchor plate arranged at oneend of the anchor cable inserted into an anchor hole, an anti-sinking part used for preventing the anchor cable from sinking is arranged on one side, far away from the anchor cable, of the anchor plate, one end of the anti-sinking part is connected with the anchor plate, and the other end of the anti-sinking part is provided with a pointed cone part. Due to the fact that the anti-sinking part is arranged on the anchor plate, and the anchor plate is temporarily fixed through the anti-sinking part, the problem that the anchor plate is prone to sink before the rotary spraying grouting slurry is initially set is solved. The anchor rod structure has the advantages that the arrangement position of the anchor cable is guaranteed, and the supporting effect is good.

Description

technical field [0001] The invention relates to the technical field of bolt construction, in particular to a bolt structure and a construction method thereof. Background technique [0002] Bolt support refers to a reinforcement and support method used in surface engineering such as slopes and deep foundation pits, as well as underground chambers such as tunnels and stopes. [0003] At present, the casing follow-up method is generally used for anchor bolt construction. The construction process is: construction preparation, earthwork excavation, measurement and positioning, casing follow-up drilling, anchor cable production, anchor cable jacking installation, grouting and Subsequent tensioning. In weak geological places, such as silt formations, the phenomenon of hole collapse often occurs during drilling, and the selection of casing to follow up the construction process can effectively prevent the hole from collapsing. However, under the same anchoring force requirements, t...

Claims

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Application Information

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IPC IPC(8): E02D5/74E02D17/20E02D15/04
CPCE02D5/74E02D15/04E02D17/20
Inventor 陈世成陈子丰徐畅
Owner 北京中润宝成工程技术有限公司
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