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Pressure type damping and energy dissipation pre-stressed anchor bolt structure and construction method

A prestressed and pressure-type technology, which is applied in the installation of bolts, foundation structure engineering, earthwork drilling and mining, etc., can solve the problems of easy damage in reinforcement projects and high investment in excavation and slope reinforcement projects, and achieves good results and bolts The effect of simple structure and convenient use

Pending Publication Date: 2020-03-06
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] A large number of high-intensity earthquake areas are distributed in my country, and the investment in excavation and slope reinforcement projects in high-intensity earthquake areas is high, and the reinforcement projects are prone to damage under the action of earthquakes

Method used

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  • Pressure type damping and energy dissipation pre-stressed anchor bolt structure and construction method
  • Pressure type damping and energy dissipation pre-stressed anchor bolt structure and construction method
  • Pressure type damping and energy dissipation pre-stressed anchor bolt structure and construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] like Figure 1-3 As shown, a pressure-type shock-absorbing and energy-dissipating prestressed anchor structure according to the present invention includes an anchor body 1 , and the anchor body 1 includes an anchoring section 11 and a free section 12 .

[0046] The anchoring section 11 is used to be connected to the grouting body 3 of the anchor hole A, the free section 12 has a space around it, and the free section 12 is sleeved in the closed sleeve 2 to form the space, and the closed The sleeve 2 is arranged in the anchor hole A; specifically, the anchor hole A is a drill hole, and the closed sleeve 2 is a steel sleeve or a plastic sleeve.

[0047] The free section 12 is stretched and connected to the energy dissipation device 4, the energy dissipation device 4 can drive the free section 12 to reciprocate along the length direction of the free section 12, and the energy dissipation device 4 is arranged in the excavation hole B Among them, the excavation hole B is exc...

Embodiment 2

[0052] A pressure-type shock-absorbing and energy-dissipating prestressed bolt structure according to the present invention differs from Embodiment 1 in that in this embodiment, the inner baffle 42 and the outer baffle 43 are respectively connected to The two ends of the stretching direction of the elastic member 41, the inner baffle 42 is located on the side of the anchor hole A, the outer baffle 43 is located on the side of the structure to be reinforced, and the outer baffle 43 passes through The connecting part 44 is anchored on the structure to be reinforced, the inner baffle 42 is slidably arranged in the protective sleeve 45, the free section 12 is connected to the inner baffle 42, and the protective sleeve The length of 45 satisfies the maximum elastic elongation of the elastic member 41 .

Embodiment 3

[0054] like Figure 1-3 As shown, the construction method of a pressure-type shock-absorbing and energy-dissipating prestressed anchor rod structure described in the present invention uses a pressure-type shock-absorbing and energy-dissipating prestressed anchor rod structure as described in Embodiment 1, and the method includes the following step:

[0055] A. Forming the anchor hole A on the structure to be reinforced;

[0056] B. Set the closed sleeve 2 outside the free section 12, and set the anchor body 1 and the closed sleeve 2 in the anchor hole A;

[0057] C. Perform high-pressure grouting to the anchor hole A, form the grouting body 3 in the anchor section 11, and anchor the anchor hole A;

[0058] D. Based on the anchor hole A, forming an excavation hole B on the structure to be reinforced;

[0059] E. The end of the free section 12 passes through the inner baffle 42 and the outer baffle 43, tensions the anchor body 1, applies prestress to the free section 12, and ...

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Abstract

The invention discloses a pressure type damping and energy dissipation pre-stressed anchor bolt structure and a construction method. The anchor bolt structure comprises an anchor bolt body comprisingan anchoring section and a free section, the anchoring section is used for being connected into a grouting body of an anchor bolt hole, gaps exist around the free section, the free section is tensioned and connected with an energy dissipation device, and the energy dissipation device can drive the free section to reciprocate in the length direction of the free section and is used for being anchored onto a to-be-reinforced structural body. The anchor bolt structure has the characteristics of being simple to operate, capable of avoiding effects of anchor bolt structure pre-stress and a support component on construction, economical, environmentally friendly, convenient to promote and the like.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to a pressure-type shock-absorbing and energy-dissipating prestressed bolt structure and a construction method. Background technique [0002] A large number of high-intensity earthquake areas are distributed in my country, and the investment in excavation and slope reinforcement projects in high-intensity earthquake areas is high, and the reinforcement projects are prone to damage under the action of earthquakes. Anchor bolts are widely used in slope reinforcement engineering, and the force mechanism of prestressed anchor bolts is more suitable for engineering slope reinforcement. How to realize the shock-absorbing and energy-dissipating effect of prestressed anchors in high-intensity earthquake areas, so as to avoid the problem of excessive force and instability of anchors when earthquakes occur, and can withstand repeated earthquakes, and has good economy. [0003] Therefo...

Claims

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Application Information

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IPC IPC(8): E02D5/76E02D31/08E21D21/00
CPCE02D5/76E02D31/08E21D21/00E21D21/0093E21D21/0033E02D2300/0029E02D2250/0046E02D2600/30E02D2200/146
Inventor 姚裕春叶世斌袁碧玉刘洋
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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