Suspension tunnel pavement self-balancing supporting device of two-stage vibration reduction structure

Abstract

The invention relates to the technical field of suspension tunnel engineering, in particular to a suspension tunnel pavement self-balancing supporting device of a two-stage vibration reduction structure. Comprising a sidewalk slab, a first-stage weight box, second-stage weight boxes, vibration reduction units, moving pair units and a fixed base, the first-stage weight box is located at the top of the fixed base, the second-stage weight boxes are located at the top of the fixed base and located at the two ends of the first-stage weight box, and the moving pair units are installed between the second-stage weight boxes and the fixed base. According to the suspension tunnel pavement self-balancing supporting device of the two-stage vibration reduction structure, a foundation structure different from an existing sidewalk slab support is adopted, and through cooperation of the first-stage weight box, the second-stage weight box, the vibration reduction unit, the moving pair unit and the fixed base, the suspension tunnel pavement self-balancing supporting device of the two-stage vibration reduction structure can be supported on the premise of providing rigid support; and damping of the sidewalk slab in all directions is provided, and the stability and safety of the sidewalk slab in the suspension tunnel are improved.

Description

Technical Field

[0001] The invention relates to the technical field of suspended tunnel engineering, and in particular to a suspended tunnel pavement self-balancing support device with a double-stage vibration reduction structure. Background Art

[0002] As a new type of cross-water transportation structure, the suspended tunnel has received extensive attention in recent years. It is self-balanced in the underwater environment through the closed tube supported by buoyancy and the tensioned anchor cables. It has the advantages of large span and small construction impact. It is a new type of transportation structure with development potential. However, in the complex and changeable marine environment, the suspended tunnel is often impacted by water flow loads in all directions, which leads to the inevitable vibration of the suspended tunnel, which not only affects the normal driving of personnel and vehicles inside, but also may cause structural damage and sealing damage.

[0003] At present, the vibration reduction measures of suspended tunnels are mainly divided into two categories: active vibration reduction and passive vibration reduction. Active vibration reduction technology mainly starts from suppressing the vibration source and carries out relevant structural design; while passive vibration reduction uses energy-absorbing materials to isolate the vibration reduction target from the vibration source. It has the characteristics of wide application range and low cost, which is more in line with the self-balancing vibration reduction requirements of suspended tunnel sidewalk slabs.

[0004] In existing research, self-balancing vibration reduction devices often adopt a single-stage vibration reduction system layout, and their vibration reduction relies only on the dampers arranged in them, and their vibration reduction effect and efficiency are not ideal. Therefore, it is urgent to develop a self-balancing vibration reduction device that can cope with the impact of water flow loads in different directions to ensure the stability and safety of suspended tunnel operation and provide strong technical support for the practical application of suspended tunnels. Summary of the invention

[0005] Based on this, it is necessary to provide a self-balancing support device for a suspended tunnel pavement with a double-stage vibration reduction structure to solve the technical problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A self-balancing supporting device for a suspended tunnel pavement with a double-stage vibration reduction structure comprises a sidewalk slab, a primary counterweight box, a secondary counterweight box, a vibration reduction unit, a mobile sub-unit and a fixed base, wherein the primary counterweight box is located on the top of the fixed base, the secondary counterweight box is located on the top of the fixed base, and the secondary counterweight box is located at both ends of the primary counterweight box, a mobile sub-unit is installed between the secondary counterweight box and the fixed base, a sidewalk slab is arranged on the top of the primary counterweight box and the secondary counterweight box, and vibration reduction units are installed between the secondary counterweight box and the sidewalk slab, between the sidewalk slab and the fixed base, and between the fixed base and the secondary counterweight box.

[0008] As a preferred embodiment of the self-balancing support device for a suspended tunnel pavement with a double-stage vibration reduction structure provided by the present invention, the vibration reduction unit is divided into a lateral vibration reduction unit and a vertical vibration reduction unit.

[0009] As a preferred embodiment of the self-balancing support device for a suspended tunnel pavement with a double-stage vibration reduction structure provided by the present invention, the sidewalk slab, the primary counterweight box, the secondary counterweight box, the vibration reduction unit, the mobile sub-unit and the fixed base are all installed at the inner bottom end of the suspended tunnel.

[0010] As a preferred embodiment of the self-balancing supporting device for a suspended tunnel pavement with a double-stage vibration reduction structure provided by the present invention, the sidewalk slab includes a rubber floor, a sidewalk slab steel frame and a first adjustable mass block, the first-level counterweight box is arranged inside the bottom end of the sidewalk slab steel frame, the first adjustable mass block is placed inside the bottom end of the sidewalk slab steel frame and on the top of the first-level counterweight box, and the rubber floor is fixed on the top of the sidewalk slab.

[0011] As a preferred embodiment of the self-balancing support device for a suspended tunnel pavement with a double-stage vibration reduction structure provided by the present invention, vibration reducer mounting holes are provided on the top and sides of the sidewalk slab steel frame.

[0012] As a preferred embodiment of the self-balancing support device for a suspended tunnel pavement with a double-stage vibration reduction structure provided by the present invention, the vibration reduction unit includes a rubber vibration reduction unit and a spring vibration reduction unit. The rubber vibration reduction unit is located at the bottom of the sidewalk slab, and the rubber vibration reduction unit is connected to a counterweight box or a fixed base. The spring vibration reduction unit consists of mounting seats on both sides, a spring and a middle hydraulic damper, and the spring vibration reduction unit is installed between the counterweight box and the fixed base.

[0013] As a preferred implementation of the self-balancing support device for a suspended tunnel pavement with a double-stage vibration reduction structure provided by the present invention, the bottom end of the fixed base is connected to the tunnel body through a tunnel fixing bolt.

[0014] As a preferred embodiment of the self-balancing supporting device for a suspended tunnel pavement with a double-stage vibration reduction structure provided by the present invention, shock absorber mounting holes are evenly distributed inside the fixed base and on the top of the sliding groove.

[0015] As a preferred embodiment of the self-balancing support device for a suspended tunnel pavement with a double-stage vibration reduction structure provided by the present invention, sliding grooves are evenly provided at both ends of the top of the fixed base, and the interior of the sliding grooves is slidably connected to the moving sub-unit.

[0016] As a preferred embodiment of the self-balancing support device for a suspended tunnel pavement with a double-stage vibration reduction structure provided by the present invention, the moving sub-unit is composed of a spring support and a needle roller row, and both ends of the needle roller row are connected to spring supports.

[0017] It can be seen without a doubt that the above-mentioned technical solution of the present application can definitely solve the technical problem to be solved by the present application.

[0018] At the same time, through the above technical solutions, the present invention has at least the following beneficial effects:

[0019] The present invention provides a self-balancing support device for a suspended tunnel pavement with a double-stage vibration reduction structure. By adopting a basic structure different from that of the existing sidewalk slab support and through the cooperation of a primary counterweight box, a secondary counterweight box, a vibration reduction unit, a mobile sub-unit and a fixed base, it can provide damping of the sidewalk slab in all directions while providing rigidity support, thereby improving the stability and safety of the sidewalk slab in the suspended tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the principle of the double-stage vibration reduction structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the double-stage vibration reduction structure of the present invention;

[0023] Figure 3 It is a diagram showing the composition of the sidewalk slab of the present invention;

[0024] Figure 4 It is a diagram of the vibration reduction system of the present invention;

[0025] Figure 5 It is a diagram of the fixed base structure of the present invention;

[0026] Figure 6 It is a schematic diagram of the installation of the double-stage vibration reduction structure of the present invention;

[0027] Figure 7 It is a schematic diagram of the operation of the double-stage vibration reduction structure of the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] Embodiment 1

[0033] Reference Figure 1-Figure 5 and Figure 7 A self-balancing support device for a suspended tunnel pavement with a double-stage vibration reduction structure. Since the sidewalk slabs in a suspended tunnel are mainly subjected to impacts in the lateral and overturning directions (clockwise and counterclockwise) along the circular cross-section of the tunnel, the self-balancing vibration reduction device is mainly designed around these two loads.

[0034] The invention comprises a sidewalk slab, a primary counterweight box, a secondary counterweight box, a vibration reduction unit, a mobile subunit and a fixed base. The primary counterweight box is located on the top of the fixed base, the secondary counterweight box is located on the top of the fixed base, and the secondary counterweight box is located at both ends of the primary counterweight box, so that the multi-stage mass distribution of the first adjustable mass block / the second adjustable mass block can reduce the direct impact of the external environment on the sidewalk slab while reducing the overall impact response by utilizing inertia. A mobile subunit is installed between the secondary counterweight box and the fixed base. Sidewalk slabs are arranged on the top of the primary counterweight box and the secondary counterweight box. There is a mobile subunit between the secondary counterweight box and the sidewalk slab. Vibration reduction units are installed between the sidewalk slabs and the fixed base, and between the fixed base and the secondary counterweight box. The vibration reduction units are divided into lateral vibration reduction units and vertical vibration reduction units. The lateral impact energy that has entered the system is quickly dissipated by the lateral vibration reduction units and the dynamic sub-units under the secondary counterweight box. In the self-balancing vibration reduction of impact in the overturning direction, on the one hand, the center of gravity height of the entire suspended tunnel is reduced by the primary counterweight box, thereby improving the overall self-balancing ability of the tunnel; on the other hand, the vertically distributed vibration reduction units on both sides are used to quickly dissipate the impact energy in the overturning direction that has entered the system.

[0035] refer to Figure 2The sidewalk slab, primary counterweight box, secondary counterweight box, vibration reduction unit, mobile subunit and fixed base are all installed at the bottom of the suspended tunnel, so that 500mm can be used as an installation unit, which can be infinitely extended along the tunnel direction and can pass through Figure 2 The illustration provides accurate guidance for subsequent manufacturing, installation and performance testing.

[0036] The sidewalk slab includes a rubber floor, a sidewalk slab steel frame and a first adjustable mass block, so that the sidewalk slab can directly carry the pedestrian part. The sidewalk slab steel frame adopts a steel structure as the main body to withstand the expected maximum load. The top and side of the sidewalk slab steel frame are provided with shock absorber mounting holes for cooperating with the shock absorbing unit. The first-level counterweight box is arranged inside the bottom end of the sidewalk slab steel frame. The first adjustable mass block is placed inside the bottom end of the sidewalk slab steel frame and on the top of the first-level counterweight box, so that the center of gravity and mass adjustment can be achieved by the first adjustable mass block or concrete pouring. The top of the sidewalk slab is fixed with a rubber floor, so that the rubber floor can be laid on the top surface of the sidewalk slab to carry out the rubber floor.

[0037] The vibration reduction unit, the second adjustable mass block and the mobile sub-unit constitute the vibration reduction system. The vibration reduction unit includes a rubber vibration reduction unit and a spring vibration reduction unit. The rubber vibration reduction unit is located at the bottom of the sidewalk slab and is connected to the counterweight box or the fixed base, so that it can have stiffness and damping properties in multiple directions. It is mainly used to absorb impact forces in the vertical and horizontal directions and provide a certain lateral support capacity. Among them, since the vertical displacement of the two sides of the sidewalk slab is larger when it overturns, a rectangular rubber unit with relatively high stiffness is used; in order to ensure the flexibility of the secondary counterweight box, a circular rubber vibration reduction unit with relatively low stiffness is used in the connection of the secondary vibration reduction box. The spring vibration reduction unit consists of mounting seats on both sides, springs and a middle hydraulic damper. The spring vibration reduction unit is installed between the counterweight box and the fixed base, and can have vertical stiffness and damping, and transmit the impact from the fixed base to the secondary counterweight box, providing the necessary horizontal stability and restoring force for the entire system. Through the combined use of these two different types of vibration reduction elements, effective suppression of vibrations of various frequencies is achieved.

[0038] A second adjustable mass block is provided in the vibration reduction system. The second adjustable mass block is used as an adjustable counterweight unit. The mass distribution and center of gravity position of the system are adjusted by changing the amount of internal filling material, thereby optimizing the overall dynamic response performance.

[0039] refer to Figure 5The bottom end of the fixed base is connected to the tunnel body through the tunnel fixing bolts, so as to support the entire vibration reduction structure and make the steel structure of the fixed base have sufficient rigidity and stability to ensure the safe and reliable operation of all the components above. Sliding grooves are evenly arranged at both ends of the top of the fixed base. The inside of the sliding groove is slidably connected with the mobile sub-unit, so that the mobile sub-unit can be installed inside the sliding groove;

[0040] The mobile subunit is composed of a spring support and a needle roller row, with spring supports connected to both ends of the needle roller row, so that the secondary counterweight box and the fixed base connected by the mobile subunit can move and adjust with each other, and can convert sliding friction into rolling friction, thereby improving the response speed and durability of the system. Shock absorber mounting holes are evenly distributed inside the fixed base and at the top of the sliding groove, which are used to fix the shock absorber unit with bolts through the shock absorber mounting holes.

[0041] Self-balancing vibration reduction device operating principle:

[0042] The self-balancing vibration reduction device mainly suppresses the impact in the lateral and overturning directions through multi-level mass distribution and efficient energy dissipation mechanism. Its operation mode is as follows Figure 7 As shown. Specifically, in the face of lateral impact, the device uses a multi-level mass distribution strategy of the first / secondary counterweight box to reduce the overall impact response through inertia, thereby indirectly protecting the sidewalk slab from direct impact. At the same time, the vibration reduction units distributed on both sides work together with the sliding sub-units under the secondary counterweight box to absorb and dissipate the lateral impact energy entering the system more quickly, further ensuring the stability of the sidewalk slab. When dealing with impacts in the overturning direction, the first-level counterweight box plays a key role in lowering the height of the center of gravity of the suspended tunnel and enhancing the self-balancing ability of the entire structure. In addition, the vertically arranged vibration reduction units further dissipate the impact energy in the overturning direction quickly, ensuring the overall stability of the tunnel.

[0043] Embodiment 2:

[0044] refer to Figure 6 , based on the above embodiment 1, the installation method is disclosed, and the steps are as follows:

[0045] 1. Place the fixed base in the tunnel and install it by using bolts and threaded holes in the tunnel. Place spring supports at both ends of the rectangular groove of the fixed base, and place the needle roller row in the middle, making sure that the needle roller row is located in the center of the groove.

[0046] 2. The two ends of the counterweight box are matched with the spring damping unit through bolts-nuts / threaded holes. Before matching, the spring compression of the spring damping unit needs to be adjusted to ensure that the stiffness and damping of each spring damping unit are consistent. The round rubber damping unit and the fixed base / counterweight box are matched through bolts-threaded holes.

[0047] 3. Place the components completed in step 2 into the fixed base, and then use the bolts-threaded holes to complete the coordination between the spring damping unit and the fixed base. Place the sidewalk slab on the top, pay attention to the coordination between the spring damping units on both sides and the bottom groove of the sidewalk slab, and then complete the connection with bolts. The installation positions of the three parts are as follows: Figure 6 shown.

[0048] Disassembly of the self-balancing vibration damping device: When disassembling, proceed in the opposite direction of installation.

[0049] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A self-balancing support device for a suspended tunnel pavement with a double-stage vibration reduction structure, characterized in that: It includes a sidewalk slab, a primary counterweight box, a secondary counterweight box, a vibration reduction unit, a mobile sub-unit and a fixed base, wherein the primary counterweight box is located at the top of the fixed base, the secondary counterweight box is located at the top of the fixed base, and the secondary counterweight box is located at both ends of the primary counterweight box, a mobile sub-unit is installed between the secondary counterweight box and the fixed base, a sidewalk slab is arranged on the top of the primary counterweight box and the secondary counterweight box, and vibration reduction units are installed between the secondary counterweight box and the sidewalk slab, between the sidewalk slab and the fixed base, and between the fixed base and the secondary counterweight box.

2. The self-balancing support device for a suspended tunnel pavement with a double-stage vibration reduction structure according to claim 1 is characterized in that: The vibration damping unit is divided into a lateral vibration damping unit and a vertical vibration damping unit.

3. The self-balancing support device for a suspended tunnel pavement with a double-stage vibration reduction structure according to claim 1 is characterized in that: The sidewalk slab, the primary counterweight box, the secondary counterweight box, the vibration reduction unit, the mobile subunit and the fixed base are all installed at the inner bottom end of the suspension tunnel.

4. The self-balancing support device for a suspended tunnel pavement with a double-stage vibration reduction structure according to claim 1 is characterized in that: The sidewalk slab includes a rubber floor, a sidewalk slab steel frame and a first adjustable mass block. The first-level counterweight box is arranged inside the bottom end of the sidewalk slab steel frame. The first adjustable mass block is placed inside the bottom end of the sidewalk slab steel frame and on the top of the first-level counterweight box. The rubber floor is fixed on the top of the sidewalk slab.

5. The self-balancing support device for a suspended tunnel pavement with a double-stage vibration reduction structure according to claim 4 is characterized in that: The top and sides of the sidewalk slab steel frame are provided with shock absorber mounting holes.

6. The self-balancing support device for a suspended tunnel pavement with a double-stage vibration reduction structure according to claim 1 is characterized in that: The vibration damping unit includes a rubber vibration damper and a spring vibration damping unit. The rubber vibration damper is located at the bottom of the sidewalk slab and is connected to a counterweight box or a fixed base. The spring vibration damping unit consists of mounting seats on both sides, a spring and a middle hydraulic damper. The spring vibration damping unit is installed between the counterweight box and the fixed base.

7. The self-balancing support device for a suspended tunnel pavement with a double-stage vibration reduction structure according to claim 1 is characterized in that: The bottom end of the fixed base is connected to the tunnel body through tunnel fixing bolts.

8. The self-balancing support device for a suspended tunnel pavement with a double-stage vibration reduction structure according to claim 1 is characterized in that: Shock absorber mounting holes are evenly distributed inside the fixed base and on the top of the sliding groove.

9. The self-balancing support device for a suspended tunnel pavement with a double-stage vibration reduction structure according to claim 1 is characterized in that: Sliding grooves are evenly arranged at both ends of the top of the fixed base, and the interior of the sliding grooves is slidably connected with the moving sub-unit.

10. The self-balancing support device for a suspended tunnel pavement with a double-stage vibration reduction structure according to claim 9, characterized in that: The movable sub-unit is composed of a spring support and a needle roller row, and both ends of the needle roller row are connected to the spring support.

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