An assembled rail transit vibration isolation trench and a construction method thereof

Abstract

The present invention discloses an assembled rail transit vibration isolation trench and a construction method thereof. The vibration isolation trench comprises: a trench, a bottom plate arranged at the bottom of the trench, support members arranged at both sides of the trench, and a vibration isolation member arranged between the support members at both sides; the support member is assembled in multiples and laid along the trench wall of the trench to form a support wall, including support panels used in pairs at both sides, and a cross brace arranged between the support panels at both sides; the vibration isolation member comprises a vibration isolation shell arranged between the support members at both sides, a buffer layer arranged around the inside of the vibration isolation shell, and a vibration isolation layer arranged inside the vibration isolation shell. Both the support member and the vibration isolation member adopt a prefabricated assembled structure to solve the problems of large engineering quantity, large construction site occupation, high engineering investment, and high risk of traditional vibration isolation trenches, and prevent long-term vibration of rail transit from causing cracks or even collapse in its structure, thereby damaging the foundation of the nearby superstructure.

Description

Technical Field

[0001] The present invention belongs to the technical field of urban construction vibration isolation, and more specifically, relates to an assembled rail transit vibration isolation trench and a construction method thereof. Background Art

[0002] With the increase of operating mileage and the accumulation of operating experience, the environmental vibration problem caused by rail transit has become increasingly prominent. The interaction between vehicles and tracks during high-speed operation generates vibrations, which are transmitted to the surrounding strata through the structure and spread to the surrounding areas through the strata, or directly transmitted to the connected structure, exciting nearby underground structures or ground buildings to generate vibrations, thereby affecting the structural safety of the buildings and the work and life of the residents in the buildings. Due to the severity of the impact of vibration problems, vibration and air pollution have been listed as seven major environmental hazards internationally. At present, the main vibration reduction and isolation technology for urban rail transit in my country is track vibration reduction, which includes fastener vibration reduction, elastic sleepers, and steel spring floating plate ballast. However, track vibration reduction will cause track corrugation, spring bar breakage, wheel wear and other diseases, which will increase vibration noise instead of reducing it.

[0003] A more effective approach on the market is to reduce vibration on the propagation path. The Chinese patent with publication number CN111379281A discloses a cylindrical unit-type vibration isolation trench and its construction method, which includes an outer reinforced concrete cylinder, an inner reinforced concrete cylinder, a bottom plate, a foam concrete block, and a cover plate. The inner reinforced concrete cylinder is arranged inside the outer reinforced concrete cylinder. The outer reinforced concrete cylinder and the inner reinforced concrete cylinder are provided with a circular cover plate on the top and a circular bottom plate on the bottom. The outer reinforced concrete cylinder and the inner reinforced concrete cylinder are filled with foam concrete blocks. It has the effect of reducing the vibration of the building structure caused by construction or road construction, traffic vibration, etc.

[0004] However, the Chinese patent with publication number CN111379281A has no supporting structure at both ends of the vibration isolation trench. During long-term vibration, the cast-in-place structures or sand and gravel on both sides of the vibration isolation trench are easily loosened. When they are replaced, the structures on both sides will fall off, affecting the vibration isolation effect. Therefore, an assembled rail transit vibration isolation trench and its construction method are needed to ensure its vibration isolation effect during long-term service. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides an assembled rail transit vibration isolation trench and a construction method thereof. Support components are arranged on both sides of the trench, and both the support components and the vibration isolation components adopt prefabricated assembled structures to solve the problems of large engineering volume, large construction site occupation, high engineering investment and high risk of traditional vibration isolation trenches. At the same time, supporting components are used to reinforce the trench walls on both sides of the trench to prevent long-term vibration of rail transit from causing cracks or even collapse in its structure, causing damage to the foundation of the superstructure nearby and affecting the life safety of the people.

[0006] To achieve the above objectives, according to a first aspect of an embodiment of the present invention, there is provided an assembled rail transit vibration isolation trench, comprising:

[0007] A groove, a bottom plate arranged at the bottom of the groove, support members arranged at both sides of the groove, and a vibration isolation member arranged between the support members at both sides;

[0008] The supporting member is assembled in multiple pieces and laid along the groove wall to form a supporting wall, including supporting panels used in pairs on both sides and cross braces arranged between the supporting panels on both sides;

[0009] The vibration isolation component includes a vibration isolation shell arranged between the supporting components on both sides, a buffer layer arranged around the inside of the vibration isolation shell, and a vibration isolation layer arranged inside the vibration isolation shell, so as to prevent the long-term vibration of rail transit from causing cracks or even collapse in its structure and damaging the foundation of the superstructure nearby.

[0010] Further, the support panel is a square plate, the top of which is provided with a semicircular protrusion as a transverse tenon, and the bottom is provided with a semicircular groove as a transverse tenon groove, and the transverse tenon and the transverse tenon groove have the same size;

[0011] One side of the support panel is provided with a long protrusion along the side length as a vertical convex tenon, and one side is provided with a long groove along the side length as a vertical concave tenon groove, and the vertical convex tenon and the vertical concave tenon groove have the same shape and size.

[0012] Furthermore, two adjacent support panels arranged laterally are connected by the matching relationship between the vertical convex tenon and the vertical concave tenon groove;

[0013] The two vertically adjacent support panels are connected through the matching relationship between the transverse convex tenon and the transverse concave tenon groove.

[0014] Furthermore, the four corners of the support panel are provided with connection holes, one end of the connection hole is a countersunk hole, and the other end is set as a boss, and the top of the boss is also provided with a countersunk hole, and the countersunk holes at both ends are connected by a through hole.

[0015] Furthermore, the cross brace is a rigid support rod, the cross-sectional shape of which is the same as the countersunk hole shape at the top of the boss at one end of the connecting hole, and circular grooves are opened along the central axis at both ends, and a threaded sleeve is embedded in the circular groove, and the threaded sleeve is fixed in the circular groove of the cross brace by interference fit;

[0016] The connecting hole bosses on the supporting panels on both sides of the supporting member are arranged oppositely, and the two ends of the cross brace are respectively inserted into the boss countersunk holes of the supporting panels on both sides and connected by bolts, and the bolt head of the bolt falls into the countersunk hole at the other end of the connecting hole.

[0017] Furthermore, the vibration isolation shell is a square box body with an open end, and a fence is provided around the inside thereof to form a U-shaped cavity between the outer box body;

[0018] In the inner fence, two horizontal partitions are arranged in parallel along the same direction, dividing the inner space into three cavities, the middle cavity is used as a filled vibration isolation cavity, and the cavities on both sides are used as air vibration isolation cavities, and vertical strip protrusions are arranged on both sides of the filled vibration isolation cavity.

[0019] Furthermore, the top of the vibration isolation shell is provided with two parallel trapezoidal notches, and the corresponding positions of the bottom thereof are provided with two trapezoidal protrusions. When the vibration isolation components are connected, the trapezoidal protrusions at the bottom of the vibration isolation shell cooperate with the trapezoidal notches at the top of the other vibration isolation shell to connect the upper and lower adjacent vibration isolation components into one.

[0020] One side of the vibration isolation shell is also provided with a trapezoidal notch, and the corresponding position of the other side is provided with a trapezoidal protrusion. When the vibration isolation components are connected, the trapezoidal notch on one side of the vibration isolation shell is connected to the trapezoidal protrusion on the other side of the other vibration isolation shell as a whole.

[0021] Furthermore, the vibration isolation layer is arranged in a filled vibration isolation cavity of the vibration isolation shell, and comprises a vibration isolation box, a first vibration isolation filling, a second vibration isolation filling and a third vibration isolation filling arranged in the vibration isolation box.

[0022] Furthermore, the vibration isolation box is a box structure with one end open, and grooves are provided on both sides of the outer wall along the height direction. The first vibration isolation filling, the second vibration isolation filling and the third vibration isolation filling are three vibration isolation filling layers, which are placed tightly in the vibration isolation box. The second vibration isolation filling is natural rubber, and the first vibration isolation filling and the third vibration isolation filling are damping asphalt pads.

[0023] According to another aspect of an embodiment of the present invention, a construction method of an assembled rail transit vibration isolation trench is provided, comprising:

[0024] S100, determine basic requirements and constraints including vibration characteristics, protected objects and geological conditions;

[0025] S200, preliminarily setting the dimension position information of the vibration isolation trench including the overall length, depth, width, and the distance between the vibration source and the protected building, and determining the specific dimension information of each structure in the supporting member and the vibration isolation member according to the obtained preliminary dimension information;

[0026] S300, prefabricate the supporting components and the vibration isolation components in the factory according to the specific size information, and transport them to the site after prefabrication;

[0027] S400, according to the preliminary size information of the vibration isolation trench, dig a trench that meets the requirements, cast a base plate at the bottom of the trench, and after assembling the various parts of the supporting components, use a crane to transport them to both sides of the trench to assemble into supporting walls;

[0028] S500, after the parts of the vibration isolation component are assembled, they are transported to the base plate by a crane for assembly, and the uppermost vibration isolation component is covered with a vibration isolation shell cover, and backfilled with soil after the installation is completed.

[0029] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0030] 1. The present invention provides an assembled rail transit vibration isolation trench, which solves the problems of large engineering volume, large construction site occupation, high engineering investment and high risk of traditional vibration isolation trenches by arranging supporting components on both sides of the trench, and both the supporting components and the vibration isolation components adopt prefabricated assembled structures. At the same time, the supporting components are used to reinforce the trench walls on both sides of the trench to prevent long-term vibration of rail transit from causing cracks or even collapse in its structure, causing damage to the foundation of the superstructure nearby and affecting the life safety of the people.

[0031] 2. In an assembled rail transit vibration isolation groove of the present invention, the bolt heads used to connect the support panels on both sides fall into the countersunk holes at one end of the connecting holes, so that the surface of the support member remains flat, ensuring that it fits tightly with the vibration isolation member and the groove wall, thereby ensuring the stability of the vibration isolation groove.

[0032] 3. In an assembled rail transit vibration isolation trench of the present invention, the vibration isolation layer cooperates with the vertical strip protrusions on both sides of the filled vibration isolation cavity of the vibration isolation shell through the grooves on both sides of its vibration isolation box, so that it can be pulled out of the vibration isolation shell, so that its installation in the vibration isolation shell is detachable, which is convenient for replacing or upgrading the damaged vibration isolation material therein. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic structural diagram of an assembled rail transit vibration isolation trench according to an embodiment of the present invention;

[0034] Figure 2This is a schematic diagram of the assembly structure of a support component of an assembled rail transit vibration isolation trench according to an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of a supporting panel structure of an assembled rail transit vibration isolation trench according to an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the side structure of a supporting member of an assembled rail transit vibration isolation trench according to an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the connection between a support member and a cross brace of an assembled rail transit vibration isolation trench according to an embodiment of the present invention;

[0038] Figure 6 This is a schematic diagram of the assembly structure of a vibration isolation component of an assembled rail transit vibration isolation trench according to an embodiment of the present invention;

[0039] Figure 7 This is a schematic diagram of the internal structure of a vibration isolation component of an assembled rail transit vibration isolation trench according to an embodiment of the present invention;

[0040] Figure 8 This is a schematic diagram of a vibration isolation shell structure of an assembled rail transit vibration isolation trench according to an embodiment of the present invention;

[0041] Fig. 9 This is a schematic diagram of the vibration isolation layer structure of an assembled rail transit vibration isolation trench according to an embodiment of the present invention;

[0042] Fig.10 It is a schematic diagram of a construction method of an assembled rail transit vibration isolation trench according to an embodiment of the present invention.

[0043] In all the drawings, the same figure numbers represent the same technical features, specifically: 1-groove, 2-bottom plate, 3-support member, 31-support panel, 311-transverse tenon, 312-transverse tenon groove, 313-vertical tenon, 314-vertical tenon groove, 315-connecting hole, 316-lifting hole, 32-cross brace, 33-threaded sleeve, 4-vibration isolation member, 41-vibration isolation shell, 42-buffer layer, 43-vibration isolation layer, 431-vibration isolation box, 432-first vibration isolation filling, 433-second vibration isolation filling, 434-third vibration isolation filling, 44-vibration isolation shell cover, 45-sealing strip, 5-backfill soil. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions 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. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] Example 1

[0046] like Figure 1 As shown, an embodiment of the present invention provides an assembled rail transit vibration isolation trench, comprising a trench 1, a bottom plate 2 arranged at the bottom of the trench 1, support members 3 arranged at both sides of the trench 1, and a vibration isolation member 4 arranged between the support members 3 at both sides. By arranging the support members 3 at both sides of the trench 1, and both the support members 3 and the vibration isolation member 4 adopting prefabricated assembled structures, the problems of large engineering volume, large construction site occupation, high engineering investment, and high risk of traditional vibration isolation trenches are solved. At the same time, the support members 3 are used to reinforce the trench walls on both sides of the trench 1 to prevent long-term vibration of rail transit from causing cracks or even collapse in its structure, causing damage to the foundation of the superstructure nearby, and affecting the life safety of the people.

[0047] The groove 1 is arranged close to the vibration source, and its bottom is cast with rubber concrete to form a bottom plate 2, with groove walls on both sides, and the two sides of the groove wall are supported by the supporting member 3, providing a supporting surface at the bottom and both sides of the vibration isolation groove.

[0048] Preferably, the groove wall of the groove 1 is vertically arranged with respect to the bottom plate 2 , or is arranged at an angle with respect to the bottom plate 2 to form an inclined surface.

[0049] like Figure 2-5As shown, the supporting member 3 is used in multiple assemblies and laid along the groove wall of the groove 1 to form a supporting wall, including supporting panels 31 used in pairs on both sides and horizontal braces 32 arranged between the supporting panels 31 on both sides. The supporting panel 31 is a square plate, with a semicircular protrusion on the top as a transverse convex tenon 311, and a semicircular groove on the bottom as a transverse concave tenon groove 312. The transverse convex tenon 311 and the transverse concave tenon groove 312 have the same size, a long protrusion is vertically provided along the side length on one side as a vertical convex tenon 313, and a long groove is opened along the side length on one side as a vertical concave tenon groove 314. The vertical convex tenon 313 and the vertical concave tenon groove 314 have the same shape and size. When assembling, two adjacent supporting panels 31 arranged horizontally are connected by the matching relationship between the vertical convex tenon 313 and the vertical concave tenon groove 314, and two adjacent supporting panels 31 arranged vertically are connected by the matching relationship between the transverse convex tenon 311 and the transverse concave tenon groove 312. The four corners of the support panel 31 are provided with connection holes 315, one end of the connection hole 315 is a countersunk hole, and the other end is set as a boss, and the top of the boss is also provided with a countersunk hole, and the countersunk holes at both ends are connected by through holes. A hoisting hole 316 is also provided above one side of the support panel 31, which is used for easy lifting and installation during use. The cross brace 32 is a rigid support rod, and the cross-sectional shape is the same as the countersunk hole shape of the boss top at one end of the connection hole 315. Both ends are provided with circular grooves along the central axis, and the circular grooves are embedded with threaded sleeves 33, and the threaded sleeves 33 are fixed in the circular grooves of the cross brace 32 by interference fit. The connection holes 315 bosses on the support panels 31 on both sides of the support member 3 are arranged oppositely, and the two ends of the cross brace 32 are respectively inserted into the boss countersunk holes of the support panels 31 on both sides, and are connected by bolts, and the bolt heads of the bolts fall into the countersunk holes at the other end of the connection hole 315.

[0050] Preferably, the bolt head used to connect the two side support panels 31 falls into the countersunk hole at one end of the connecting hole 315, so that the surface of the supporting member 3 remains flat, ensuring that it fits tightly with the vibration isolation member 4 and the groove wall of the groove 1, thereby ensuring the stability of the vibration isolation groove.

[0051] Preferably, the single support member 3 is composed of the horizontal brace 32 connected to the support panels 31 on both sides, which increases the thickness of the support member 3, making the support member 3 more stable when supporting the groove walls on both sides of the groove 1, thereby enhancing the vibration isolation effect of the vibration isolation groove. A continuous air vibration isolation belt is formed on both sides of the vibration isolation groove, effectively blocking the propagation of vibration waves underground.

[0052] Preferably, the supporting wall laid on the trench walls on both sides of the trench 1 is formed by splicing a plurality of the supporting members 3. The components of the supporting members 3 are pre-processed in a factory and transported to the construction site for splicing. The supporting wall is modularized to achieve rapid construction, saving the construction time and construction cost of the vibration isolation trench.

[0053] like Figure 6-9 As shown, the vibration isolation member 4 is assembled and used by multiple parts, including a vibration isolation shell 41 arranged between the support members 3 on both sides, a buffer layer 42 arranged around the inside of the vibration isolation shell 41, and a vibration isolation layer 43 arranged inside the vibration isolation shell 41. The vibration isolation shell 41 is a square box body with one end open, and a fence is also arranged around the inside to form a U-shaped cavity between the outer box body. In the inner fence, two horizontal partitions are arranged in parallel along the same direction to divide the internal space into three cavities, the middle cavity is used as a filled vibration isolation cavity, and the cavities on both sides are used as air vibration isolation cavities, and vertical strip protrusions are arranged on both sides of the filled vibration isolation cavity. The top of the vibration isolation shell 41 is provided with two parallel trapezoidal notches, and the corresponding positions of the bottom are provided with two trapezoidal protrusions. When the vibration isolation members 4 are connected, the trapezoidal protrusions at the bottom of the vibration isolation shell 41 cooperate with the trapezoidal notches at the top of the other vibration isolation shell 41 to connect the upper and lower adjacent vibration isolation members 4 into one. One side of the vibration isolation shell 41 is also provided with a trapezoidal notch, and a trapezoidal protrusion is provided at a corresponding position on the other side thereof, and when the vibration isolation components 4 are connected, the trapezoidal notch on one side of the vibration isolation shell 41 is connected to the trapezoidal protrusion on the other side of the other vibration isolation shell 41 as a whole, thereby realizing the assembly of the vibration isolation components 4.

[0054] Preferably, during assembly, the air vibration isolation chamber inside the vibration isolation housing 41 is maintained in the same vertical plane to ensure its vibration isolation performance.

[0055] The vibration isolation layer 43 is arranged in the filled vibration isolation cavity of the vibration isolation shell 41, and includes a vibration isolation box 431, a first vibration isolation filler 432, a second vibration isolation filler 433 and a third vibration isolation filler 434 arranged in the vibration isolation box 431. The vibration isolation box 431 is a box structure with one end open, and grooves are arranged on both sides of the outer wall along the height direction. The first vibration isolation filler 432, the second vibration isolation filler 433 and the third vibration isolation filler 434 are three vibration isolation filler layers, which are tightly placed in the vibration isolation box 431. The second vibration isolation filler 433 is natural rubber, and the first vibration isolation filler 432 and the third vibration isolation filler 434 are damping asphalt pads. The second vibration isolation filler 433 is used as a vibration isolation pad, and the first vibration isolation filler 432 and the third vibration isolation filler 434 are used as damping pads. The design of two layers of damping pads clamping one layer of vibration isolation pad increases the vibration isolation performance of the vibration isolation layer 43 and absorbs most of the vibration waves generated by rail transit.

[0056] The air vibration isolation cavity of the vibration isolation shell 41 is not filled with any material, and absorbs a portion of the vibration waves reaching the vibration isolation layer 43, while secondary absorbing the vibration waves not absorbed by the vibration isolation layer 43, further enhancing the vibration isolation performance of the vibration isolation component 4, while reducing the damage to the vibration isolation material in the vibration isolation layer 43 and increasing its service life.

[0057] The buffer layer 42 is disposed in the U-shaped cavity of the vibration isolation shell 41 and is composed of buffer materials including polyurethane foam, cork pads, etc., so as to further attenuate high-frequency vibration waves and protect the vibration isolation materials.

[0058] After the vibration isolation shell 41 is assembled, a vibration isolation shell cover 44 is provided on the top of the uppermost layer to cover the components of the vibration isolation shell 41 and isolate it from the external environment to prevent adverse factors such as moisture in the external environment from damaging the internal materials and affecting its vibration isolation performance.

[0059] Preferably, the vibration isolation layer 43 cooperates with the vertical strip protrusions on both sides of the filled vibration isolation cavity of the vibration isolation shell 41 through the grooves on both sides of its vibration isolation box 431, so as to realize its pulling and pulling in the vibration isolation shell 41, so that its installation in the vibration isolation shell 41 is detachable, which is convenient for replacing or upgrading the damaged vibration isolation material therein.

[0060] A shallow groove is formed at the connection between the adjacent sides of the vibration isolation shell 41, and a sealing strip 45 is arranged in the shallow groove to prevent vibration waves from penetrating through the gap at the connection of the vibration isolation shell 41 in the vibration isolation groove to affect the vibration isolation effect.

[0061] Backfill soil 5 is also provided on both sides and the top of the vibration isolation trench. After the vibration isolation trench is set, the backfill soil 5 is used to backfill it to ensure the normal construction and use of the ground building.

[0062] Preferably, a plurality of sensors are provided on both sides of the vibration isolation member 4 for monitoring the intensity of the vibration wave before and after passing through the vibration isolation groove, so as to monitor its vibration isolation performance.

[0063] Example 2

[0064] like Fig.10 As shown, an embodiment of the present invention provides a construction method for an assembled rail transit vibration isolation trench, comprising the following steps:

[0065] S100, determine basic requirements and constraints including vibration characteristics, protected objects and geological conditions;

[0066] S200, preliminarily setting the dimension position information of the vibration isolation trench including the overall length, depth, width and the distance between the vibration source and the protected building, and determining the specific dimension information of each structure in the support member 3 and the vibration isolation member 4 according to the obtained preliminary dimension information;

[0067] S300, prefabricate the relevant parts of the support member 3 and the vibration isolation member 4 in the factory according to the specific size information, and transport them to the site after prefabrication;

[0068] S400, according to the preliminary size information of the vibration isolation trench, dig out a trench 1 that meets the requirements, and cast a base plate 2 at the bottom of the trench 1. After assembling the various parts of the supporting member 3, use a crane to transport them to both sides of the trench 1 and assemble them into supporting walls;

[0069] S500, after the parts of the vibration isolation component 4 are assembled, they are transported to the base plate 2 by using a crane for assembly, and the uppermost vibration isolation component 4 is covered with a vibration isolation shell cover 44, and backfilled with backfill soil 5 after the installation is completed.

[0070] In step S100, the vibration characteristics include the vibration frequency, amplitude and energy distribution generated during the operation of rail transit, which are obtained by professional organizations through on-site tests or historical data; the specific parameters of the protected object are its building type, structural strength, sensitivity and distance from the track; the geological conditions include the soil type, density and permeability of the construction area.

[0071] In step S200, the vibration wave may bypass the vibration isolation trench in the horizontal direction, making the vibration isolation trench ineffective. To prevent this from happening, the vibration isolation trench should be as close to the vibration source as possible. If the vibration isolation trench is far away from the vibration source and cannot be close to the vibration source, the length of the vibration isolation trench needs to be appropriately increased to ensure the vibration isolation effect. The length of the vibration isolation trench should be designed to be more than 1.2 times the length of the protected building. At this time, attention should also be paid to the positional relationship between the vibration isolation trench and the protected building. The optimal vibration reduction zone of the vibration isolation trench is located at a distance between 50 and 100 times the width of the vibration isolation trench. Therefore, in order to maximize the effect of the vibration isolation trench, the width of the vibration isolation trench should be changed so that the protected building is in the optimal vibration reduction zone, but the minimum width should not be less than 0.4m and should not be greater than 1m. Considering that the vibration wave may also bypass from the bottom of the vibration isolation trench, so that the vibration wave energy reflected by the vibration isolation trench is very small, the depth of the vibration isolation trench should not be less than 1 / 2 of the wavelength of the Rayleigh wave of the site, and the bottom of the vibration isolation trench should be more than 3m deeper than the underground vibration source, so as to effectively prevent the vibration wave from bypassing the vibration isolation trench.

[0072] In step S300, the size of the support member 3 takes into account the different depths of the vibration isolation trench and the different formation parameters of different projects. The size of a single piece of the vibration isolation trench support structure should be designed specifically for the specific project. If the size is too small, the complexity of the assembly construction will increase. If the size is too large, the support capacity of the vibration isolation trench support structure will be insufficient, the stability will decrease, and engineering accidents will be prone to occur. At the same time, considering the requirements of the prefabricated construction module, the length is determined to be 3-4.8m and the height is 1.5m-3m. When designing the thickness, it is taken into account that the shear resistance and bending resistance of the vibration isolation trench support structure are positively correlated with the thickness. At the same time, the factors of the hole length and the thickness of the steel bar protective layer must also be considered, so as to determine that the thickness of the vibration isolation trench support structure should be greater than 200mm.

[0073] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An assembled rail transit vibration isolation trench, characterized in that: include: A groove (1), a bottom plate (2) arranged at the bottom of the groove (1), support members (3) arranged at both sides of the groove (1), and a vibration isolation member (4) arranged between the support members (3) at both sides; The supporting member (3) is assembled in plurality and laid along the wall of the groove (1) to form a supporting wall, comprising supporting panels (31) used in pairs on both sides and a cross brace (32) arranged between the supporting panels (31) on both sides; The vibration isolation component (4) comprises a vibration isolation shell (41) arranged between the support components (3) on both sides, a buffer layer (42) arranged around the inside of the vibration isolation shell (41), and a vibration isolation layer (43) arranged inside the vibration isolation shell (41), so as to prevent long-term vibration of rail transit from causing cracks or even collapse in the structure, thereby damaging the foundation of the nearby superstructure; The four corners of the support panel (31) are each provided with a connection hole (315), one end of the connection hole (315) is a countersunk hole, and the other end is provided as a boss, and a countersunk hole is also provided on the top of the boss, and the countersunk holes at both ends are connected by a through hole; The cross brace (32) is a rigid support rod, the cross-sectional shape of which is the same as the countersunk hole shape at the top of the boss at one end of the connecting hole (315), and circular grooves are formed at both ends along the central axis, a threaded sleeve (33) is embedded in the circular groove, and the threaded sleeve (33) is fixed in the circular groove of the cross brace (32) by interference fit; The connecting holes (315) and bosses on the supporting panels (31) on both sides of the supporting member (3) are arranged opposite to each other, and the two ends of the cross brace (32) are respectively inserted into the boss countersunk holes of the supporting panels (31) on both sides and connected by bolts, and the bolt heads of the bolts fall into the countersunk holes at the other ends of the connecting holes (315).

2. The assembled rail transit vibration isolation trench according to claim 1, characterized in that: The support panel (31) is a square plate, with a semicircular protrusion on the top as a transverse tenon (311), and a semicircular groove on the bottom as a transverse tenon groove (312), and the transverse tenon (311) and the transverse tenon groove (312) have the same size; One side of the support panel (31) is provided with a long protrusion along the side length in the vertical direction as a vertical convex tenon (313), and one side is provided with a long groove along the side length as a vertical concave tenon groove (314), and the vertical convex tenon (313) and the vertical concave tenon groove (314) have the same shape and size.

3. The assembled rail transit vibration isolation trench according to claim 2, characterized in that: Two of the support panels (31) disposed adjacent to each other in the transverse direction are connected via the matching relationship between the vertical convex tenon (313) and the vertical concave tenon groove (314); Two adjacent support panels (31) arranged vertically are connected via the matching relationship between the transverse convex tenon (311) and the transverse concave tenon groove (312).

4. An assembled rail transit vibration isolation trench according to any one of claims 1 to 3, characterized in that: The vibration isolation shell (41) is a square box body with an open end, and a fence is arranged around the inside thereof to form a U-shaped cavity between the outer box body and the outer box body; In the inner fence, two horizontal partitions are arranged in parallel along the same direction, dividing the inner space into three cavities, the middle cavity is used as a filled vibration isolation cavity, and the cavities on both sides are used as air vibration isolation cavities, and vertical strip protrusions are arranged on both sides of the filled vibration isolation cavity.

5. The assembled rail transit vibration isolation trench according to claim 4, characterized in that: The top of the vibration isolation shell (41) is provided with two parallel trapezoidal notches, and the bottom thereof is provided with two trapezoidal protrusions at corresponding positions. When the vibration isolation components (4) are connected, the trapezoidal protrusions at the bottom of the vibration isolation shell (41) cooperate with the trapezoidal notches at the top of another vibration isolation shell (41), so that the upper and lower adjacent vibration isolation components (4) are connected as one body. One side of the vibration isolation shell (41) is also provided with a trapezoidal notch, and a corresponding position on the other side thereof is provided with a trapezoidal protrusion; when the vibration isolation components (4) are connected, the trapezoidal notch on one side of the vibration isolation shell (41) and the trapezoidal protrusion on the other side of the other vibration isolation shell (41) are connected as one body.

6. The assembled rail transit vibration isolation trench according to claim 5, characterized in that: The vibration isolation layer (43) is arranged in the filled vibration isolation cavity of the vibration isolation shell (41), and comprises a vibration isolation box (431), a first vibration isolation filling (432), a second vibration isolation filling (433), and a third vibration isolation filling (434) arranged in the vibration isolation box (431).

7. The assembled rail transit vibration isolation trench according to claim 6, characterized in that: The vibration isolation box (431) is a box structure with one end open, and grooves are provided on both sides of the outer wall along the height direction. The first vibration isolation filler (432), the second vibration isolation filler (433) and the third vibration isolation filler (434) are three vibration isolation filler layers, which are tightly placed in the vibration isolation box (431). The second vibration isolation filler (433) is natural rubber, and the first vibration isolation filler (432) and the third vibration isolation filler (434) are damping asphalt pads.

8. A construction method for an assembled rail transit vibration isolation trench as claimed in any one of claims 1 to 7, characterized in that: include: S100, determine basic requirements and constraints including vibration characteristics, protected objects and geological conditions; S200, preliminarily setting the dimension position information of the vibration isolation trench including the overall length, depth, width and the distance between the vibration source and the protected building, and determining the specific dimension information of each structure in the support member (3) and the vibration isolation member (4) based on the obtained preliminary dimension information; S300, prefabricate the supporting component (3) and the vibration isolation component (4) related parts in the factory according to the specific size information, and transport them to the site after prefabrication; S400, according to the preliminary size information of the vibration isolation trench, dig out a trench (1) that meets the requirements, and cast a base plate (2) at the bottom of the trench (1). After assembling the various parts of the supporting member (3), use a crane to transport them to both sides of the trench (1) and assemble them into supporting walls; S500, after the parts of the vibration isolation component (4) are assembled, they are transported to the base plate (2) by using a crane for assembly, and the uppermost vibration isolation component (4) is covered with a vibration isolation shell cover (44), and backfilled with soil (5) after the installation is completed.

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