CN107366544A - A kind of piston type particle damping energy dissipation vibration damping subway segment - Google Patents

Abstract

The invention discloses a piston-type particle damping, energy-dissipating and vibration-damping subway segment. The piston-type particle-damping, energy-dissipating and vibration-damping subway segment includes a segment body and a piston-type particle damping element buried inside the segment body. . The advantage of the present invention is that the piston-type particle damping element can efficiently absorb vibration energy of various frequencies; the piston-type particle damping element is buried inside the main body of the segment, which can effectively dissipate the piston-type particle damping energy consumption and vibration reduction subway The vibration energy of the segments during the working process is equivalent to increasing the damping of the subway tunnel wall structure, which can effectively prevent the vibration and noise in the subway tunnel from spreading to the outside of the subway tunnel.

Description

A piston-type particle damping energy-dissipating vibration-absorbing subway segment

technical field

The invention belongs to the technical field of rail transit, and in particular relates to a piston type particle damping energy consumption and vibration reduction subway segment.

Background technique

In recent years, the urban rail transit system has developed rapidly due to its large capacity and environmental protection advantages, but it has harmful effects such as noise and environmental vibration. With the continuous improvement of people's requirements for quality of life, residents along the subway line are dissatisfied with the noise of rail transit, which makes the noise and environmental vibration caused by rail transit gradually transform from technical problems to livelihood issues, which has attracted much attention from the society. Therefore, the vibration reduction of rail transit is carried out The processing of noise reduction is crucial.

Traditional subway tunnel segments play the role of supporting the surrounding rock and isolating it from the external environment of the surrounding rock, but do not play the role of vibration reduction. The subway tunnel segment is the only way for the rail vibration to transmit to the surrounding soil and buildings. The subway vibration damping equipment in the prior art includes floating plates, vibration damping fasteners, etc., which are expensive and complicated to maintain and repair. It will bring negative effects such as corrugation, so the research on subway segments that can play a role in vibration reduction is full of prospects and worth exploring.

Contents of the invention

The object of the present invention is to provide a piston-type particle damping, energy-dissipating and vibration-damping subway segment according to the shortcomings of the above-mentioned prior art. The piston-type particle damping element is buried inside the main body of the segment, so as to achieve the purpose of dissipating the vibration energy of the tunnel wall.

The object of the present invention is realized by the following technical solutions:

A piston-type particle damping, energy-dissipating and vibration-damping subway segment, the piston-type particle-damping, energy-dissipating and vibration-damping subway segment comprising a segment body and a piston-type particle damping element embedded in the segment body.

The piston-type particle damping element includes a casing, and damping particles and metal balls are arranged inside the casing; the metal ball is connected and fixed to the segment main body through a wire.

The two sides of the metal ball are respectively fixedly connected with one of the metal wires, and the two metal wires pass through the two opposite side walls of the shell respectively, and extend into the main body of the segment to be connected with the concrete solid. knot, the part where the metal wire is consolidated with the concrete is in a helical shape.

The shell is a hexahedron with a side length between 1.3 and 1.5 cm.

The material of the damping particles is any one or more combinations of tungsten powder, lead powder, copper powder and iron powder; the particle diameter of the damping particles is 0.001~0.5mm; the damping particles inside the housing The filling rate of the particles is between 50 and 90%.

The particle diameter of the damping particles, the filling rate of the damping particles and the material density of the damping particles are all proportional to the vibration amplitude of the piston-type particle damping energy dissipation vibration damping subway segment during work.

The diameter of the metal ball is between 4.5mm and 5.5mm.

The main body of the segment is arched, and several bolt connection grooves are provided on the edge of the main body of the segment; sealing tenons or sealing grooves are arranged on the splicing end faces of the main body of the segment; With rubber seal.

The main body of the segment is composed of concrete and at least two layers of steel mesh, the steel mesh is bound with several steel wires, and the shell is bonded to the steel wires by metal glue.

The advantage of the present invention is that the piston-type particle damping element can efficiently absorb vibration energy of various frequencies; the piston-type particle damping element is buried inside the main body of the segment, which can effectively dissipate the piston-type particle damping energy consumption and vibration reduction subway The vibration energy of the segment during the working process is equivalent to increasing the damping of the subway tunnel wall structure, which can effectively prevent the vibration and noise in the subway tunnel from spreading to the outside of the subway tunnel; in addition, the piston type particle damping element is embedded in the main body of the segment The inside can also reduce other vibration damping devices in the subway tunnel, increasing the available space in the subway tunnel; compared with other vibration reduction measures, the piston type particle damping element buried in the main body of the segment has a simple structure and good durability. It can effectively reduce the workload of maintenance and repair.

Description of drawings

Fig. 1 is the three-dimensional view of the piston-type particle damping energy dissipation vibration damping subway segment among the present invention;

Fig. 2 is a schematic diagram of the arrangement of the piston type particle damping element in the segment main body in the present invention;

Fig. 3 is a partial enlarged view of the junction of adjacent segment main bodies in the present invention;

Fig. 4 is the schematic structural view of the piston type particle damping element in the present invention;

Fig. 5 is the reinforcing bar diagram of the cross section of the segment main body in the present invention;

Fig. 6 is the reinforced figure of the longitudinal section of the segment main body in the present invention;

Fig. 7 is a schematic diagram of the piston type particle damping element bonded to the steel wire in the present invention;

Fig. 8 is a schematic diagram of a cross-section of a tunnel installed with piston-type particle damping, energy-dissipating and vibration-absorbing subway segments.

detailed description

The features of the present invention and other relevant features are described in further detail below in conjunction with the accompanying drawings through the embodiments, so as to facilitate the understanding of those skilled in the art:

As shown in Figure 1-8, the marks 1-18 in the figure are respectively: piston type particle damping energy consumption vibration reduction subway segment 1, segment body 2, piston type particle damping element 3, bolt connection groove 4, bolt hole 5, straight Rod stud bolt 6, nut 7, sealing tenon 8, sealing groove 9, rubber sealing strip 10, shell 11, damping particles 12, metal ball 13, metal wire 14, steel mesh 15, erecting rib 16, Stirrup 17, steel wire 18.

Embodiment: As shown in Figures 1 and 2, this embodiment specifically relates to a piston-type particle damping, energy-dissipating and vibration-reducing subway segment. Piston-type particle damping element 3 inside the segment body 2 .

As shown in Figures 1 and 2, the segment body 2 is an arched member made of reinforced concrete. The segment body 2 has an inner diameter of 5000mm to 5500mm, an axial length of 1000mm to 1500mm, and a thickness of 350mm to 400mm; A plurality of bolt connection grooves 4 are arranged on the edge of the segment main body 2 ; bolt holes 5 are opened between the side walls of the bolt connection grooves 4 and the end surface of the segment main body 2 .

As shown in Figures 1 to 3, in the tunnel wall structure, the bolt connection grooves 4 of adjacent segment main bodies 2 are adapted to each other; connection; the two ends of the straight stud bolts 6 respectively pass through the bolt holes 5 on the end faces of the two segment main bodies 2, and extend to the inside of the two bolt connection grooves 4; the two ends of the straight stud bolts 6 are respectively installed with A nut 7, the nut 7 leans against the inner surface of the bolt connection groove 4; the straight stud bolt 6 cooperates with the nut 7 to connect the adjacent segment main bodies together.

As shown in Figures 1 to 3, a sealing tenon 8 or a sealing groove 9 is provided on the left and right sides of the segment main body 2; in this embodiment, a sealing tenon 8 is provided on the left end surface of the segment main body 2, The right side end face is provided with a sealing groove 9; the sealing tenon 8 and the sealing groove 9 of the adjacent segment main body 2 are compatible with each other; a rubber sealing strip 10 is arranged in the sealing groove 9; the rubber sealing strip 10 can not only It can play a waterproof role and can also play a buffering role; through the buffering of the rubber sealing strip 10, it can avoid the stress on the end surface of the segment main body 2 when the adjacent segment main body 2 is connected with the straight rod stud bolt 6 Concentrate and crush the concrete at the end face of segment body 2.

As shown in Figures 2 and 4, the piston-type particle damping element 3 embedded in the segment main body 2 is mainly used to absorb the vibration energy of the piston-type particle damping energy consumption and damping subway segment 1 in the working process; the piston-type particle damping The element 3 includes a housing 11, and the housing 11 is provided with damping particles 12 and metal balls 13; the metal ball 13 and the segment main body 2 are connected and fixed by a metal wire 14; in this embodiment, both sides of the metal ball 13 One metal wire 14 is fixedly connected respectively, and the two metal wires 14 pass through two opposite side walls of the casing 11 respectively, and extend to the concrete interior of the segment main body 2 for consolidation. A through hole through which the wire 14 passes.

As shown in Figures 2 and 4, the piston-type particle damping element 3 is a passive vibration control technology; The vibration of sheet 1 is transmitted to the piston type particle damping element 3 through the segment body 2, so that the damping particles 12 in the piston type particle damping element 3 vibrate; at the same time, the segment body 2 pulls the piston type particle damping element 3 through the wire 14 The metal ball 13 in the metal ball 13 makes the metal ball 13 vibrate; during the vibration process of the metal ball 13 and the damping particle 12, the damping particle 12 will collide and rub with the metal ball 13, and collision and friction will also occur between the damping particles; Collision and friction will consume vibration energy, and convert vibration energy into heat, thereby achieving the effect of dissipating vibration energy; embedding the piston-type particle damping element 3 inside the segment main body 2 can effectively strengthen the piston-type particle damping element of this embodiment. Damping Energy Dissipation The ability of vibration damping subway segment 1 to dissipate vibration energy.

As shown in Figures 2 and 4, in this embodiment, the housing 11 of the piston type particle damping element 3 is a regular hexahedron made of Q195 thin steel plate with a thickness of 2 mm, and its side length is between 1.3 and 1.5 cm; The joints of the thin steel plates of the body 11 are bonded by metal glue with ethyl cyanoacrylate as the main raw material.

As shown in Figures 2 and 4, in this embodiment, the material of the damping particles 12 is any one or more combinations of tungsten powder, lead powder, copper powder, and iron powder. By adjusting the damping particles 12 of various materials The overall density of the damping particles 12 can be adjusted; the particle diameter of the damping particles 12 is 0.001mm to 0.5mm; the filling rate of the damping particles 12 inside the shell 11 is between 50% and 90%; in order to achieve better damping vibration effect, the particle size of the damping particles 12, the filling rate of the damping particles 12 in the housing 11, and the material density of the damping particles 12 are all proportional to the vibration amplitude of the piston type particle damping energy consumption and vibration reduction subway segment 1 in the working process .

As shown in Figures 2 and 4, in the present embodiment, the diameter of the through hole for the metal wire 14 to pass on the side wall of the housing 11 is 1mm; the metal wire 14 is a thin iron wire with a diameter of 0.3mm, and the metal wire 14 passes through The mode of welding is connected with the metal ball 13; the metal ball 13 is a small iron ball with a diameter between 4.5mm and 5.5mm, the larger the diameter of the metal ball 13, the better the vibration damping effect; in order to facilitate production, each metal ball 13 Small iron balls with the same diameter can be used; the end of the metal wire 14 extends through the casing 11 to the concrete interior of the segment main body 2, and is consolidated with the concrete; in this embodiment, the part where the metal wire 14 is consolidated with the concrete The helical shape makes the connection between the metal wire 14 and the segment main body 2 more stable, so that the metal wire 14 will not be separated from the concrete of the segment main body 2 during the vibration process.

As shown in Figures 5 and 6, in this embodiment, the segment main body 2 is provided with double-layer reinforcement mesh 15; each layer of reinforcement mesh 15 includes longitudinal reinforcement and transverse reinforcement; The distance between adjacent steel bars is 150mm to 200mm; the distance between two steel meshes 15 is 200 to 250mm; erecting bars 16 and stirrups 17 are arranged between the two layers of steel mesh 15 for connection.

As shown in Figures 1 to 8, in the process of producing the piston type particle damping energy consumption and vibration reduction subway segment 1 of this embodiment, the dynamic load caused by the line conditions, train speed and piston type particle damping energy consumption can be reduced. The vibration amplitude of the vibrating iron segment 1 in the working process selects parameters such as the filling rate of the damping particles 12, the density of the damping particles 12, and the arrangement density of the piston-type particle damping elements 3; the piston-type particle damping energy consumption of the present embodiment is reduced The method for producing and using the vibrating iron segment 1 includes the following steps:

1) Place the formwork designed in advance according to the geometric dimensions, and carry out reinforcement according to the reinforcement diagram; the distribution of reinforcement is shown in Figure 5 and Figure 6.

2) According to the structure shown in Figure 4, the piston type particle damping element 3 is produced. In the production process, the Q195 thin steel plate with a thickness of 2 mm is first used to make the shell 11; the joints of the thin steel plates use ethyl cyanoacrylate as the main raw material. Adhesive bonding; after the shell 11 is manufactured, damping particles 12 are filled inside it, and metal balls 13 and metal wires 14 are installed.

3) As shown in Figures 5 and 7, after the production of the piston-type particle damping element 3 is completed, the shell 11 of the piston-type particle damping element 3 is bonded to the steel wire 18 through metal glue according to the designed number and density, and Steel wires 18 are bound to the reinforcement mesh 15 of the segment body 2 .

4) Inject concrete with a strength of C30 to C50 into the formwork, vibrate and then carry out curing. After 28 days, the mold is demoulded, and the piston-type particle damping, energy-dissipating and vibration-reducing subway segment 1 is completed.

5) As shown in Figure 8, during the tunnel construction process, the piston-type particle damping energy-dissipating vibration-reducing subway segment 1 of this embodiment is installed at the bottom of the tunnel; the segment at the top of the tunnel adopts the conventional segment in the prior art .

The beneficial technical effects of this embodiment are: the piston-type particle damping element can efficiently absorb vibration energy of various frequencies; the piston-type particle damping element is buried inside the main body of the segment, which can effectively dissipate the piston-type particle damping energy consumption The vibration energy of the damping subway segment in the working process is equivalent to increasing the damping of the subway tunnel wall structure, which can effectively prevent the vibration and noise in the subway tunnel from spreading to the outside of the subway tunnel; in addition, the piston type particle damping element is buried in the The interior of the segment body can also reduce other vibration damping devices in the subway tunnel, increasing the available space in the subway tunnel; compared with other vibration reduction measures, the piston type particle damping element embedded in the segment body is simple in structure and durable Good performance, can effectively reduce the workload of maintenance and repair.

Claims (9)

1. A kind of 1. piston type particle damping energy dissipation vibration damping subway segment, it is characterised in that：The piston type particle damping energy dissipation subtracts The subway segment that shakes includes section of jurisdiction main body and is embedded in the piston type particle damping element of the section of jurisdiction body interior.
2. A kind of 2. piston type particle damping energy dissipation vibration damping subway segment according to claim 1, it is characterised in that：The work Plug particle damping element includes housing, and the enclosure interior is provided with damping particles and metal ball；The metal ball with it is described It is connected between the main body of section of jurisdiction through wire.
3. A kind of 3. piston type particle damping energy dissipation vibration damping subway segment according to claim 2, it is characterised in that：The gold The both sides of category ball have been respectively fixedly connected with a wire, and two wires are each passed through two phases of the housing To side wall, and extend in the section of jurisdiction main body and consolidated with concrete, the wire and the part of concrete consolidation In the shape of a spiral.
4. A kind of 4. piston type particle damping energy dissipation vibration damping subway segment according to claim 2, it is characterised in that：The shell Body is hexahedron, and its length of side is between 1.3 ~ 1.5cm.
5. A kind of 5. piston type particle damping energy dissipation vibration damping subway segment according to claim 2, it is characterised in that：The resistance The material of Buddhist nun's particle is the combination of any one or more in tungsten powder, lead powder, copper powder and iron powder；The grain of the damping particles Footpath is 0.001 ~ 0.5mm；The filling rate of damping particles is between 50 ~ 90% described in the enclosure interior.
6. A kind of 6. piston type particle damping energy dissipation vibration damping subway segment according to claim 5, it is characterised in that：The resistance The material density of the particle diameter of Buddhist nun's particle, the filling rate of the damping particles and the damping particles with the piston type particle The Oscillation Amplitude of damping energy dissipation vibration damping subway segment in the course of the work is directly proportional.
7. A kind of 7. piston type particle damping energy dissipation vibration damping subway segment according to claim 2, it is characterised in that：The gold Belong to the diameter of ball between 4.5 ~ 5.5mm.
8. A kind of 8. piston type particle damping energy dissipation vibration damping subway segment according to claim 1, it is characterised in that：The pipe Piece main body is domed, and the edge of the section of jurisdiction main body is provided with some clamping slots；In the splicing end face of the section of jurisdiction main body On be provided with sealing protruding tenon or sealed groove；Rubber weather strip is provided with the sealed groove.
9. A kind of 9. piston type particle damping energy dissipation vibration damping subway segment according to claim 2, it is characterised in that：The pipe By concrete and at least, two layers of bar-mat reinforcement is formed piece main body, and some steel wires, the housing warp are banded with the bar-mat reinforcement Metal-to-metal adhesive is bonded on the steel wire.