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Energy dissipation pile for subway structure

A technology of subway structure and pile body, which is applied in basic structure engineering, sheet pile wall, protection device, etc., can solve the problems of limited vibration reduction effect, difficult isolation, increase construction cost and construction difficulty, etc., and achieve vibration reduction and energy consumption. Effects that boost effects, suppress spread, and reduce the effects of whiplash effects

Active Publication Date: 2021-06-11
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a whiplash effect at the end of the traditional equal-section pile, and the length of the pile body has to be increased to reduce the impact of vibration amplification at the pile end. This treatment method will increase the construction cost and difficulty of construction; in addition, the existing pile The body structure is difficult to isolate the propagation of surface Rayleigh waves, and the vibration reduction effect is very limited

Method used

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  • Energy dissipation pile for subway structure
  • Energy dissipation pile for subway structure
  • Energy dissipation pile for subway structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The metro structure of the subway structure of the present embodiment includes a top end 1, a pile body 2, and a bottom end 3, and the pile body 2 is a columnar shape, and the top is fixed to the bottom of the top end 1, and the bottom of the pile body is fixed. Connect to the top of the bottom terminal 3; the maximum cross-sectional area of ​​the top end 1 and the bottom end 3 is larger than the cross-sectional area of ​​the pile body 2.

[0048] Such as figure 1 As shown, the energy consumption pile of the present embodiment is larger than the cross-sectional dimension of the pile body 2, which exhibits two ends to enlarged shape, and can weake the whipping effect to the bottom of the pile body to a certain extent. Adverse effects, further, in the present embodiment, there is a relationship between the maximum cross-sectional area of ​​the top end 1 and the bottom end 3 and the cross-sectional area of ​​the pile body 2:

[0049] S 1 = αs 2 ;

[0050] S 3 = βS 2 ;

[0051]...

Embodiment 2

[0068] In this embodiment, the top end 1, the cross section of the pile 2 and the bottom end 3, wherein the cross section is 250 mm × 250 mm, the cross section is 0.0625m. 2 The extension coefficient α = 400% of the top end 1, the bottom end 3 is expanded coefficient β = 196%, the top end 1 maximum cross section size is 500 mm × 500 mm, the bottom end 3 maximum cross-section size is 350 mm × 350 mm.

[0069] In this embodiment, the pile body 2 is a C25 concrete, the rubber particles are added to 2%, the damping ratio is 0.06; the top end 1 and the bottom end 3 are used to add 3% rubber particles, the damping ratio is 0.09, The damping ratio of the top end 1 and the bottom end 3 material is 1.5 times the damping ratio of the pile body 2 material.

[0070] In the present embodiment, the subway tunnel 4 buried 7M, the outer diameter of the tunnel 4, the pile pile of the pile pile is 16.5m, and the single row is arranged on the subway tunnel 4 side, such as Figure 4 Indicated.

[0071...

Embodiment 3

[0073] In this embodiment, the top end 1, the cross section of the pile 2 and the bottom end 3, wherein the cross section is 250 mm × 250 mm, the cross section is 0.0625m. 2 The extension coefficient α = 400% of the top end 1, the bottom end 3 is expanded coefficient β = 196%, the top end 1 maximum cross section size is 500 mm × 500 mm, the bottom end 3 maximum cross-section size is 350 mm × 350 mm.

[0074] In this embodiment, the pile body 2 is a C25 concrete, the rubber particles are added to 2%, the damping ratio is 0.06; the top end 1 and the bottom end 3 are used to add 3% rubber particles, the damping ratio is 0.09, The damping ratio of the top end 1 and the bottom end 3 material is 1.5 times the damping ratio of the pile body 2 material.

[0075] In the present embodiment, the subway station 5 buried 9m, the station layer is 7m, the pile pile length is 20m, and the single row is arranged on the side of the subway station, such as Figure 5 Indicated.

[0076] The structure ...

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Abstract

The invention discloses an energy dissipation pile for a subway structure, and belongs to the field of subway equipment. The energy dissipation pile comprises a top end, a pile body and a bottom end, wherein the pile body is columnar, the top of the pile body is fixedly connected to the bottom of the top end, and the bottom of the pile body is fixedly connected to the top of the bottom end; both the maximum cross sectional area of the top end and the maximum cross sectional area of the bottom end are larger than the cross sectional area of the pile body; both the top end and the bottom end are made of concrete to which a high-damping-ratio elastic material is added, and the adding amount is 3% to 10%; and the pile body is made of concrete to which a high-damping-ratio elastic material is added, and the adding amount is 2% to 5%. According to the energy dissipation pile, the high-damping-ratio elastic material is added to the energy dissipation pile, so that the vibration reduction and energy dissipation effects of the energy dissipation pile are greatly increased; and the appropriate material damping ratios of the ends and the pile body are matched, and the end expansion type pile structure is combined, so that the influence of a whipping effect can be effectively reduced, and the vibration amplification phenomenon of the pile bottom can be inhibited within the short design length.

Description

Technical field [0001] The present invention belongs to the field of subway equipment, and more specifically, the energy consumption pile for a subway structure. Background technique [0002] With a large number of constructions of the subway, more and more subway lines are adjacent or even needed to vibrate control, and the industry mainly vibrate the vibration and vibration vibration vibration and vibration vibration isolation in the vibration vibration. Vibration control, where the vibration propagation pathway is mainly used to block or change the propagation of the vibration wave to the protected area, thereby reducing the ground, structure vibration of the protected area. [0003] At present, many scholars have studied that row pose vibration damages are better vibration isolation. However, there is a whipping effect in the end of the traditional section of the cross-sectional pile, which has to increase the length of the pile body, reducing the impact of the pile end vibra...

Claims

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Application Information

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IPC IPC(8): E02D5/30E02D31/08
CPCE02D5/30E02D31/08
Inventor 金浩
Owner SOUTHEAST UNIV
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