Shrink sleeve damping device, rockfall vibration damping shed tunnel and design method thereof

A technology of vibration-damping devices and design methods, which can be applied to protective equipment, buildings, etc., and can solve problems such as complex maintenance of arc-shaped vibration-damping roofs

Active Publication Date: 2018-05-15
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Falling rocks cannot stay on the top of this type of product, so in the design of the entire shed tunnel protection system, it is necessary to reserve a space for accumulation of falling rocks, and the falling rocks will continue to roll down with the arc surface of the vibration damping shed, which will not achieve the goal of avoiding rockfall hazards as much as possible
At the same time, after the arc-shaped shock-absorbing roof is damaged, the repair of some parts is relatively complicated

Method used

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  • Shrink sleeve damping device, rockfall vibration damping shed tunnel and design method thereof
  • Shrink sleeve damping device, rockfall vibration damping shed tunnel and design method thereof
  • Shrink sleeve damping device, rockfall vibration damping shed tunnel and design method thereof

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Experimental program
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Effect test

Embodiment 1

[0073] like Figure 1 ~ Figure 2 As shown, design and process a telescopic sleeve damping device of the present invention.

[0074] According to design requirements, the telescopic sleeve vibration damping device in this embodiment is used for rockfall impact vibration damping in mountainous areas. The impact of the telescopic sleeve vibration damping device mainly comes from the impact of falling rocks, and the general impact energy E 40 , higher impact energy E 80 , the maximum impact energy E max They are all determined according to the method of on-site investigation and investigation of rockfall disasters and survey statistics. The result is E 40 =1000kJ, higher impact energy E 80 =2200kJ, maximum impact energy E max = 4000kJ. Carbon steel is selected as the telescoping sleeve material, and the yield platform stress of the material is determined to be σ=210Mpa by uniaxial compression test. According to the on-site investigation, it is determined that the diameter ...

Embodiment 2

[0081] like image 3 shown. On the basis of Embodiment 1, the arc length l of each layer of the telescopic sleeve vibration damping device is completed 1 , l 2 , l 3 the design of.

[0082] image 3 is a schematic diagram of the vertical section structure of the damping bushing 2 (indicating the arc length l i ). Will D 01 =300mm, D 1 =317mm,t 1 =17mm,D 02 =317mm, D 2 = 360mm, t 2 = 43mm, D 03 =360mm, D 3 = 468 mm, t 3 =108mm are respectively substituted into formula 13 (s takes the value of 0.6, 0.5, 0.4 in turn), and there are each layer of telescopic tubes and the arc length radius R of each segment of telescopic structure 1 =52mm, R 2 =73mm, R 3 = 102mm. Substituting further into Equation 12 there is l 1 =41mm, l 2 =57mm, l 3 =80mm.

[0083] then R 1 =52mm, l 1= 41mm, R 2 =73mm, l 2 =57mm,R 3 =102mm, l 3 =80mm are respectively substituted into formula 14, and the height h of each arc length of each layer of telescopic tube after optimization d...

Embodiment 3

[0085] like Figure 4 , Figure 5 Shown, design and process a rockfall damping shed of the present invention on the basis of Embodiment 1, and its similarity with Embodiment 1 will not be repeated.

[0086] Figure 4 It is a schematic diagram of the side structure of the rockfall damping shed. The rockfall damping shed cave includes a telescopic sleeve vibration damping device; the telescopic sleeve vibration damping device is arranged on the top of the shed cave, the lower bearing plate 3 is connected to the energy dissipator 4, and the lower part of the energy dissipator 4 is connected to the shed cave pillar.

[0087] In this embodiment, the rockfall damping shed is a flat-topped shed.

[0088] Figure 5 It is a schematic diagram of the arrangement structure of the vibration-damping sleeves 2 on the top of the tunnel. The upper force bearing plate 1 and the lower force bearing plate 3 are rectangular, perpendicular to the axis of the shed hole (y coordinate direction) ...

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Abstract

The invention discloses a shrink sleeve damping device aiming at solving the problems in the prior art that direction protection of the top of a rockfall protection shed tunnel is limited, or maintenance thereof is complex. The provided shrink sleeve damping device is characterized in that the shrink sleeve damping device comprises an upper bearing plate, a vibration damping sleeve and a lower bearing plate; the lower bottom surface of the upper bearing plate is in static connection with the top of the vibration damping sleeve; the bottom of the vibration damping sleeve is in static connectionwith the upper top face of the lower bearing plate; the vibration damping sleeve is composed of metal shrink tubes of multiple layers in inner and outer coaxial socket; the inner-layer metal shrink tubes are higher than the outer-layer metal shrink tubes; the metal shrink tubes at adjacent layers are closely connected. A rockfall vibration damping shed tunnel, and design methods of the shrink sleeve damping device and the rockfall vibration damping shed tunnel are also provided. The shrink sleeve damping device, rockfall vibration damping shed tunnel and design methods thereof have the advantages that the shrink damping device has an ingenious design, realizes classification of energy consumption and repeated multiple energy dissipation and vibration reduction functions and improves damping efficiency of the device; the rockfall vibration damping shed tunnel can solve the problem that traditional shed tunnel protection systems are not easy to repair and maintain; design methods are simple and practical.

Description

technical field [0001] The invention relates to a vibration damping device and a design method thereof, in particular to a telescopic sleeve vibration damping device and a design method thereof, and belongs to the fields of disaster prevention and control engineering in mountainous areas and road and bridge engineering. Background technique [0002] Building shed tunnels is a disaster prevention and control project built in the half-cut section of road traffic in mountainous areas to prevent landslides from destroying the road surface, prevent landslides and rockfalls, and minimize the hazards of landslides and rockfalls. The construction of traffic routes needs to go through mountainous areas. Road construction in these areas involves a lot of slope excavation and support problems, and the problems of dangerous rock collapse and falling rocks on the slope are prominent. Especially in accident-prone areas, a large number of falling rocks and falling rocks often damage the ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01F7/04
CPCE01F7/045
Inventor 吴永武旺明王斌何思明李新坡王东坡
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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