CN116516729A - Buried road bed plate, road bed and construction method thereof - Google Patents

Abstract

The invention provides a buried road bed board, a road bed and a construction method thereof, wherein a board body is arranged on a substrate through a plurality of rubber springs due to the fact that the buried road bed board and the road bed are provided with a plurality of buried vibration isolators, rigid connection between a track structure and the substrate structure is separated in a point supporting mode, impact energy during running of a train is absorbed, and vibration reduction and noise reduction are achieved. The construction method combines the concept of the assembled building, can improve the construction precision and effect, the plate body adopts the precast slab, the mounting seat of the buried vibration isolator is pre-buried below the plate body, and when in construction, the construction of the buried road bed plate can be completed by sequentially placing the height adjusting gasket and the spring component comprising the rubber spring at the position of the vibration isolator set on the substrate and then placing the precast slab on the substrate, so that the upper end of the spring component is embedded into the corresponding mounting seat.

Description

Buried road bed plate, road bed and construction method thereof

Technical Field

The invention belongs to the technical field of vibration and noise reduction of tracks, and particularly relates to a buried track bed board, a track bed and a construction method thereof.

Background

Along with the development of economy and science, rail transit tends to be high-speed and stable, and mechanical equipment tends to be precise. In order to respond to the development demands of the industry and overcome the influence of vibration on the stability of the structure, the running safety of the vehicle and the precision of mechanical equipment, the technology and the product capable of effectively reducing vibration and noise are needed to improve the stability of the structure, ensure the running safety of a track line and ensure the higher precision of the mechanical equipment.

In the prior art, part of ballast beds adopt a form of matching a floating slab with a vibration reduction pad or matching a floating slab with a plurality of steel springs to achieve a certain vibration reduction effect, and a plurality of problems still exist: for the ballast bed adopting the vibration-damping pad, the vibration-damping pad is usually in a full-spread mode, so that the rigidity of the whole vibration-damping system is still larger, the system frequency is higher, the vibration-damping effect is limited, the full-spread vibration-damping pad also causes difficulties in water supply and drainage and the like, in addition, the vibration-damping pad is usually fixed on a precast slab in a secondary processing (such as rivet and paste) mode, and the working procedure is complex; for the ballast bed adopting the steel springs, the working procedure is complex, the labor intensity of construction workers is high, the rigidity of the steel springs is not easy to adjust, the steel springs and the assembly tools thereof are large in size, and the construction is difficult to carry out in space with limited sizes such as an overhead frame.

In addition, the construction period of the track on the overhead is usually required to be tight, but the vibration reduction track bed in the prior art has long construction period due to complex working procedures, the fact that the floating slab adopts on-site casting and needs to wait for concrete solidification maintenance and the like, and the construction period requirement of the vibration reduction track on the overhead is difficult to meet.

Disclosure of Invention

The invention is to solve the above problems, and aims to provide a buried road bed board, a track bed and a construction method thereof, which can realize vibration reduction and noise reduction effects, are easy to construct and have short construction period, and the invention adopts the following technical scheme:

the invention provides a buried road bed board, which is characterized by comprising: a plate body; and the plurality of buried vibration isolators are embedded in the plate body, the plurality of buried vibration isolators are arranged according to a preset arrangement rule, each buried vibration isolator is provided with an installation seat, a spring assembly, a height adjusting gasket and a limiting column, the installation seats are embedded below the plate body, the spring assembly comprises a spring support upper shell, a spring support lower shell and a rubber spring arranged inside a cladding structure formed by embedding the spring support upper shell and the spring support lower shell, a limiting column installation groove is formed in the bottom of the spring support lower shell, one end of each limiting column is embedded in the corresponding limiting column installation groove, and the other end of each limiting column is driven into a substrate.

The buried road bed board provided by the invention can also have the technical characteristics that the length of the board body is 3500mm, the board body is used for arranging 6 pairs of sleepers, steel rails are arranged on the sleepers, and the preset arrangement rules are as follows: 3 pairs of buried vibration isolators are arranged at equal intervals below the plate body, each pair of buried vibration isolators is arranged between two adjacent pairs of sleepers, and each buried vibration isolator is arranged right below the steel rail.

The buried track bed board provided by the invention can also have the technical characteristics that the length of the track board is 4700mm and is used for arranging 8 pairs of sleepers, the steel rails are arranged on the sleepers, and the preset arrangement rules are as follows: 4 pairs of buried vibration isolators are arranged at equal intervals below the plate body, each pair of buried vibration isolators is arranged between two adjacent pairs of sleepers, and each buried vibration isolator is arranged right below the steel rail.

The buried road bed board provided by the invention can also have the technical characteristics that the mounting seat is made of metal, and the top of the upper spring support shell is provided with a magnet piece which can be adsorbed with the metal and is used for enabling the upper spring support shell to be adsorbed and fixed in the mounting seat.

The invention provides a ballast bed, which is characterized by comprising the following components: a plurality of buried road bed boards are connected end to end; and a plurality of limit bosses for transversely limiting two adjacent buried track bed plates, wherein the buried track bed plates are the buried track bed plates.

The track bed provided by the invention can also have the technical characteristics that the limit boss is cylindrical or cuboid, two limit grooves are formed in two sides of the length direction of the plate body of the buried track bed plate, the shape of each limit groove is matched with that of each limit boss, and each limit boss is respectively clamped with the limit groove on the corresponding side of the two adjacent buried track bed plates.

The invention provides a construction method for track construction by adopting the buried track bed plate, which is characterized by comprising the following steps:

step S1, setting a plurality of mounting positions of buried vibration isolators on a substrate;

step S2, for each installation position, sequentially and overlapped placing a height adjusting gasket and a spring assembly at the installation position;

s3, placing a plate body which is poured in advance on the substrate through hoisting equipment, wherein a plurality of mounting seats of the buried vibration isolators are pre-buried below the plate body, and the upper ends of the spring assemblies are respectively embedded into the corresponding mounting seats;

step S4, adopting a stress detection tool to carry out stress detection on all the spring assemblies so as to judge whether loosening phenomenon exists or not;

and S5, when the step S4 is judged to be yes, lifting the plate body through the lifting equipment, replacing the corresponding height-adjusting gasket according to the stress detection result, and returning to the step S4.

The construction method provided by the invention can also have the technical characteristics that the step S1 comprises the following sub-steps:

step S1-1, measuring the substrate through a basic mark point on the substrate, and setting the installation position of the buried vibration isolator based on a measurement result;

s1-2, driving each limit column into the substrate according to the installation position,

in step S2, when the height-adjusting spacer and the spring assembly are placed on the substrate, the limit post passes through the abdication hole of the height-adjusting spacer, and one end of the limit post is embedded into the limit groove at the bottom of the spring support lower shell of the spring assembly.

The actions and effects of the invention

According to the buried track bed board, the track bed and the construction method thereof, as the buried track bed board is provided with the plurality of buried vibration isolators, the track board is arranged on the substrate through the rubber springs of the plurality of buried vibration isolators, namely, a point support mode is adopted to isolate the rigid connection between the track structure and the substrate structure, and the impact energy during the running of the train is absorbed through the plurality of rubber springs, so that the vibration and noise reduction effects of the track are realized. Furthermore, the construction method of the invention combines the concept of the assembled building, can work at multiple areas, stations and points simultaneously, thus improving the construction precision and effect, in particular, the track slab adopts the precast slab, the vibration isolator mounting groove is arranged below the track slab, the outer cover of the buried vibration isolator is embedded in the groove, when in construction, only the height-adjusting gasket and the spring support shell containing the rubber spring are sequentially arranged at the position of the vibration isolator set on the substrate, and then the precast track slab is arranged on the substrate, so that the spring support shell is embedded in the corresponding outer cover, and the construction of the buried road bed slab can be completed. In addition, the buried vibration isolator is arranged below the track slab, and no exposed structure exists above the track slab, so that the track slab and the track bed which are constructed have the advantage of attractive appearance.

Drawings

FIG. 1 is a schematic plan view of a ballast bed according to a first embodiment of the present invention;

FIG. 2 is a cross-sectional view of a ballast bed in an isolator position in accordance with a first embodiment of the present invention;

FIG. 3 is a schematic plan view of a buried track bed in accordance with an embodiment of the present invention;

figure 4 is an exploded view of a buried vibration isolator in accordance with a first embodiment of the present invention;

FIG. 5 is a perspective view of a mounting base according to a first embodiment of the present invention;

FIG. 6 is a perspective view of a mounting base at different angles according to a first embodiment of the present invention;

FIG. 7 is a cross-sectional view of a spring assembly according to a first embodiment of the present invention;

FIG. 8 is a perspective view of a height-adjusting gasket according to an embodiment of the present invention;

FIG. 9 is an orthographic view of a lift pad in accordance with an embodiment of the present invention;

FIG. 10 is a perspective view of a spacing post according to an embodiment of the present invention;

figure 11 is a cross-sectional view of a buried vibration isolator in accordance with a first embodiment of the present invention;

FIG. 12 is a cross-sectional view of a ballast bed in a limit boss position in accordance with a first embodiment of the present invention;

FIG. 13 is an enlarged view of the inner portion of circle B of FIG. 2;

FIG. 14 is a flow chart of track construction using buried track slabs in accordance with a first embodiment of the present invention;

FIG. 15 is a flowchart of step S1 in a first embodiment of the present invention;

FIG. 16 is a perspective view of a spring assembly according to a second embodiment of the present invention;

FIG. 17 is a perspective view of a spring assembly at different angles according to a second embodiment of the present invention;

FIG. 18 is an exploded view of a spring assembly according to a second embodiment of the present invention;

FIG. 19 is a perspective view of a spring-supported lower housing in accordance with a second embodiment of the present invention;

FIG. 20 is a perspective view of a connecting plate in a second embodiment of the present invention;

fig. 21 is a cross-sectional view of a spring assembly in accordance with a second embodiment of the present invention.

Reference numerals:

ballast bed 100; a buried road bed board 110; a plate body 111; sleeper 112; a limit groove 114; buried vibration isolator 140; a mounting seat 141; a flange 1411; a spring assembly 142; the spring supports an upper housing 1421; an embedded groove 14211; a magnet mounting groove 14212; a spring-supported lower housing 1422; rubber ring mounting groove 14221; limit post mounting slots 14222; a rubber spring 1423; limit rubber rings 1424; a magnet 1425; an anti-drop bracket 1426; a connection plate 14261; a fixing hole 14261a; limit bar hole 14261b; a bracket connector 14262; a bracket fixing member 14263; heightening the spacer 143; a relief hole 1431; a limit post 144; an upper cylindrical end 1441; a lower cylindrical end 1442; a substrate 200; a limit boss 400; an elastic pad 401.

Detailed Description

In order to make the technical means, creation characteristics, achievement purposes and effects of the invention easy to understand, the buried road bed board, the track bed and the construction method thereof are specifically described below with reference to the embodiments and the drawings.

Example 1

Fig. 1 is a schematic plan view of a ballast bed in this embodiment.

Fig. 2 is a cross-sectional view of the ballast bed in the position of the vibration isolator in this embodiment, with parts of the relatively slim structure omitted to illustrate the overall structural composition.

Fig. 3 is a schematic plan view of the track bed in this embodiment.

As shown in fig. 1 to 3, the ballast bed 100 of the present embodiment is provided on an overhead for mounting rails. The track bed 100 is comprised of a plurality of buried track bed boards 110 joined end to end.

The buried road bed board 110 is disposed on a base 200, the base 200 being made of concrete, and being cast on an overhead girder. The buried road bed board 110 includes a board body 111 and a plurality of buried vibration isolators 140, wherein the board body 111 is a prestressed reinforced concrete slab, is pre-cast and molded in a factory, and is laid on an overhead; the buried vibration isolators 140 are embedded in the plate body 111 in a group of two, and the two buried vibration isolators 140 of a group are respectively located at positions directly below the two rails.

In this embodiment, the overhead is a 30m beam, the plate 111 includes two types of P3500 type and P4700 type, and for the 30m beam, 7P 3500 type plate bodies and 1P 4700 type plate body are laid. Wherein, the dimensions of the P3500 type plate body are 3500mm x 2400mm x 260mm (length x width x thickness), 6 sleeper 112 are arranged on the plate body at equal intervals; the P4700-type plate body has dimensions of 4700mm×2400mm×260mm (length×width×thickness), and 8 pairs of sleepers 112 are provided at equal intervals thereon. The rail is mounted on the track bed 110 by tie 112 and clip fittings. In addition, the plate body 111 of the present embodiment forms a part of an overhead beam span plate, the plate ends of the plate body 111 located at the beam end positions are aligned with the beam ends, and the plate slits between the remaining plate bodies 111 are uniformly arranged, and the plate slits are 50mm to 150mm.

In addition, as shown in fig. 3, 4 groups of two hoisting bushings 115 are further disposed on both sides of the plate 111 in the width direction, for hoisting the plate 111 by the hoisting device.

As shown in fig. 1 and 3, a plurality of buried vibration isolators 140 are provided below the plate 111 to reduce vibration and noise of the track when the train is running. Wherein 3 pairs of buried vibration isolators 140 are arranged at equal intervals below the P3500-type plate body, each pair of buried vibration isolators 140 is arranged between two adjacent pairs of sleepers 112, and each buried vibration isolator 140 is arranged right below a steel rail; 4 pairs of buried vibration isolators 140 are arranged at equal intervals below the P4700-type plate body, and the concrete arrangement method is the same as that described above.

In addition, the planar positions of the respective buried vibration isolators 140 are indicated by dashed circles in fig. 1 and 3, and the structure of the buried vibration isolator 140 is not visible from above the buried road bed board 110 after the installation is completed.

Fig. 4 is a structural exploded view of the buried vibration isolator in this embodiment.

As shown in fig. 4, the buried vibration isolator 140 includes a mounting block 141, a spring assembly 142, a height adjustment washer 143, and a spacing post 144.

Fig. 5 is a perspective view of the mount in this embodiment.

Fig. 6 is a perspective view of the mounting base in this embodiment at different angles.

The mounting seat 141 is a steel embedded part, and is arranged at a corresponding position in the steel bar frame of the plate body 111 in advance when the plate body 111 of concrete is cast. As shown in fig. 5 to 6, the mounting seat 141 has a circular cover shape, and the thickness of the housing is 8mm to 12mm. The upper end of the mounting block 141 has a collar 1411 for increasing the adhesion and load bearing capacity of the mounting block 141.

The spring assembly 142 is generally cylindrical in overall shape and has a diameter less than the inner diameter of the mounting block 141.

Fig. 7 is a sectional view of the spring assembly in this embodiment.

The spring assembly 142 absorbs vibration energy transmitted from the plate 111 during operation of the train by utilizing its elastic deformation function, and plays a role in vibration reduction and noise reduction. As shown in fig. 4 and 7, the spring assembly 142 includes a spring support upper housing 1421, a spring support lower housing 1422, a rubber spring 1423, and a plurality of stopper rubber rings 1424.

The spring support upper housing 1421 is made of a metal material and has a circular cap shape, and has a circular insertion groove 14211 formed in the top inner surface thereof, and the insertion groove 14211 has a shape and size matching those of the upper end of the rubber spring 1423.

The spring support lower housing 1422 is also made of metal material and has a circular cap shape, and its diameter is smaller than that of the spring support upper housing 1421, so that the two housings can be embedded together, and the spring support upper housing 1421 is coated outside the spring support lower housing 1422 to form a coating structure. The inner diameter of the spring support lower housing 1422 matches the rubber spring 1423. In addition, the outer periphery of the spring support lower housing 1422 has two annular rubber ring mounting grooves 14221 for fitting and mounting a limit rubber ring 1424; the spring support lower housing 1422 has a circular limit post mounting groove 14222 in the middle of the bottom surface for mounting the limit post 144.

The rubber spring 1423 is made of rubber through vulcanization, and has an upper end and a lower end which are in a circular plate shape, and the upper end and the lower end of the rubber spring 1423 are both wrapped with a circular metal plate for enabling the force born by the two ends to be more uniformly transferred to the middle part. The middle portion of the rubber spring 1423 is formed between the upper and lower ends, and the middle portion thereof is contracted radially inward, and both sides of the rubber spring 1423 are formed in an inward curved shape as viewed from the side.

Rubber spring 1423 has a variety of stiffness specifications. During the production process, the stiffness of the rubber spring 1423 can be adjusted by adjusting the rubber composition and production parameters. In the present embodiment, the rubber springs 1423 provided in the middle of the plate body 111 have relatively lower rigidity, and the rubber springs 1423 provided on both sides in the longitudinal direction of the plate body 111 have relatively higher rigidity. Since relatively large vibrations are generated at both sides of the plate 111 due to the presence of the cross section, the vibration damping effect of the plate 111 as a whole can be more uniform by such arrangement.

The rubber spring 1423 is provided inside a cladding structure formed by the fitting of the spring support upper case 1421 and the spring support lower case 1422. The upper end of the rubber spring 1423 is fitted in the insertion groove 14211 and fixed by bonding; the lower end of the rubber spring 1423 is fitted in the spring-supported lower housing 1422 and is also fixed by bonding, thereby forming a vibration damping assembly having an elastic cushioning effect as a whole.

The two limiting rubber rings 1424 are respectively embedded in the two ring rubber ring mounting grooves 14221 of the spring support lower shell 1422, the limiting rubber rings 1424 protrude outwards from the rubber ring mounting grooves 14221, and the protruding parts of the limiting rubber rings 1424 are abutted against the inner surface of the spring support upper shell 1421, so that transverse limiting is formed on the upper shell and the lower shell.

Fig. 8 is a perspective view of the height-adjusting spacer according to the present embodiment.

Fig. 9 is an orthographic view of the height adjustment shim in this embodiment.

The height adjustment shims 143 are used to adjust the mounting height of the spring assemblies 142, and thus the height of the upper surface of the track bed 110, throughout. As shown in fig. 8-9, the lift pad 143 is a circular sheet metal piece having a diameter substantially corresponding to the diameter of the spring assembly 142. A circular relief hole 1431 is formed in the middle of the height-adjusting gasket 143 for the limiting post 144 to pass through during installation.

The height-adjusting spacers 143 have various rules, and have different thicknesses, respectively, of 2mm to 25mm. One or more height adjustment shims 143 may be provided for each isolator depending on the actual needs of the track.

Fig. 10 is a perspective view of the stopper post in the present embodiment.

The stop posts 144 serve to secure the spring assembly 142 to the base 200 and limit lateral displacement thereof. As shown in fig. 4 and 10, the stopper post 144 is a shaft pin-shaped metal part having an upper cylindrical end 1441 and a lower cylindrical end 1442. When in installation, the upper cylindrical end 1441 is embedded into the limit post mounting groove 14222 at the bottom of the spring support lower housing 1422, the lower cylindrical end 1442 is driven into the substrate 200 for fixing, and the length of the lower cylindrical end 1442 (i.e. the depth of the driven substrate) is 40 mm-60 mm. In addition, the upper cylindrical end 1441 has a larger diameter than the lower cylindrical end 1442, and thus a stepped structure is formed at an upper position in the middle of the stopper post 144 for limiting the driving depth of the stopper post 144 when driving the substrate 200.

Fig. 11 is a cross-sectional view of the buried vibration isolator in the present embodiment, and fig. 11 shows a structure in which the mounting of the buried vibration isolator is completed.

As shown in fig. 11, after the installation is completed, the installation seat 141 is embedded in the lower portion of the plate body 111 to form a circular installation groove opened downward, the upper end of the spring assembly 142 (i.e., the spring support upper housing 1421) is installed in the installation seat 141, the lower end (i.e., the spring support lower housing 1422) is placed on the base 200, and a limit structure is formed by the limit posts 144.

In addition, the overall height of the spring assembly 142 and the height-adjusting washer 143 is greater than the distance from the inner top surface of the mounting seat 141 to the base 200, so that the plate body 111 is not in direct contact with the base 200 after the mounting is completed, but is formed in the form of a floating plate, and is connected to the base 200 in a point contact manner by a plurality of spring assemblies 142.

Fig. 12 is a cross-sectional view of the ballast bed in this embodiment at the limit boss position.

As shown in fig. 1 and 12, the track bed 100 is formed by assembling a plurality of the track bed boards 110 end to end, and the interval between two adjacent track bed boards 110 is 70mm. The two sides of the plate 111 in the length direction are also provided with limit grooves 114 respectively, and the limit grooves 114 are in a cuboid shape with guide angles and are used for arranging limit bosses 400 during assembly. The limit boss 400 is a rectangular concrete stage with a guide angle, and its shape is matched with the limit groove 114. During assembly, the limiting bosses 400 are respectively clamped with the limiting grooves 114 on the corresponding sides of the two adjacent track bed plates 110, so that the track bed plates 110 are transversely limited.

Fig. 13 is an enlarged view of the inner portion of circle B in fig. 2.

As shown in fig. 13, a plurality of sealing strips 150 are further provided between both sides of the plate body 111 in the width direction and the base 200, and the sealing strips 150 are made of rubber for shielding the gap between the plate body 111 and the base 200 from both sides, thereby preventing dust, foreign matters, etc. from entering the gap from both sides to affect the vibration damping effect and the service life of the vibration isolator. Sealing strip 150 should meet sealing requirements and its fire rating should be rated class a (see "classification of combustion properties of building materials and articles" (GB 8624-2012)). One end of the sealing tape 150 in the width direction is adhered to the side of the plate body 111 by strong glue, and the other end is fixed to the base 200 by a rivet 151.

A construction method of performing track construction using the above-described buried road bed 100 will be described in detail. Before construction, the basic data is collected and basic mark points are distributed, which comprises the following steps:

and (3) carrying out civil engineering structure bottom plate and limit measurement, wherein the construction conditions of the prefabricated track plates 110 are attached, the laying of the track plates 110 is not affected, and meanwhile, the drainage sequential construction before and after the vibration reduction track is carried out in advance. And after the acceptance condition is reached, the base mark points are laid in time.

Then, construction is performed based on the adjusted design.

Fig. 14 is a flowchart of track construction using a buried track bed in this embodiment.

As shown in fig. 14, the track construction process using the above-mentioned buried road bed board 110 specifically includes the following steps:

in step S1, a plurality of mounting positions of the buried vibration isolators 140 are set on the base 200.

The base 200 is formed by pouring concrete, the base template is installed before the pouring of the concrete, accumulated water of the base is cleaned, and concrete construction can be performed after the accumulated water reaches the design requirement. The base 200 is made of C40 concrete, the construction error of the position foundation elevation of the preset vibration isolator on the base 200 is (+ 0, -5) mm, the thickness of the minimum protective layer of the reinforcing steel bars is controlled to be 35mm, meanwhile, the base 200 is pre-embedded with reinforcing steel bars of the limit boss 400 according to track bed blocks (namely the blocks of the track plate 110), and a rough surface is reserved at the position of the preset limit boss 400.

The strength test evaluation of self-compacting concrete was performed as specified in the concrete strength test evaluation criterion (GB/T50107). Quality inspection and acceptance are carried out according to the specification of quality acceptance Specification of concrete construction engineering (GB 50204).

After the concrete of the substrate is poured, the curing measures such as covering, water storage, film moisture preservation, spraying or brushing of curing agent and the like are adopted in time, and the curing time is not less than five days. After the pouring of the substrate is finished and the initial setting is carried out for 24 hours, the position of the vibration isolator can be set and secondary base mark test can be carried out.

Fig. 15 is a flowchart of setting the mounting position of the vibration isolator in the present embodiment.

As shown in fig. 15, the step S1 specifically includes the following sub-steps:

in step S1-1, the base 200 is measured by the base mark points on the base 200, and the mounting positions (three-way) of the respective buried vibration isolators 140 are laid out based on the measurement results and identified.

Wherein, based on the measured data, the parts of the substrate 200 which do not meet the design requirements are also treated, and the parts are subjected to re-polishing or grouting treatment, so that the surface elevation of the concrete substrate 200 below each vibration isolator is ensured to be within the required range of (+ 0, -5) mm within the range of 1m in diameter.

In step S1-2, a plurality of spacing posts 144 are respectively driven into the substrate 200 according to the plurality of mounting positions set in step S1-1.

Wherein the depth of penetration of the stopper posts 144 into the substrate 200 is 45mm.

Step S2, for each mounting position set in step S1, the height adjustment shims 143 and the spring assemblies 142 are placed in sequence and superimposed at the mounting position.

The thickness and number of the height-adjusting spacers 143 are calculated according to the elevation measured by the foundation, and the height-adjusting spacers 143 are selected correspondingly. And the spring assembly 142 and the elevation shim 143 are carried to a designated place in advance for assembly.

During assembly, the height-adjusting gasket 143 is placed on the base 200 at the mounting position, and the yielding hole 1432 in the middle of the height-adjusting gasket 143 passes through the limit post 144. The spring assembly 142 is stacked on the elevation adjustment spacer 143 with the upper ends of the stopper posts 144 embedded in the stopper post mounting grooves 14222 in the bottom surface of the spring support lower housing 1422.

In step S3, the pre-poured plate 111 is placed on the substrate 200 by a lifting device, wherein a plurality of mounting seats 141 of the buried vibration isolators 140 are pre-buried under the plate 111, and after the plate 111 is put down, the upper ends of the spring assemblies 142 are respectively embedded into the corresponding mounting seats 141.

In this embodiment, the hoisting device is a small rail or rail-less laying crane, and after hoisting the plate 111 by 4 sets of hoisting sleeves 115 on the side of the plate 111, the hoisting device walks to the laying position, and correspondingly places the center line, the end line and the side line of the plate 111 in place according to the measurement data. After the lifting device puts down the plate 111, the upper spring supporting shells 1421 are embedded in the corresponding outer covers 141, and the plate 111 enters a spring supporting state to form a floating plate.

In step S4, after the plate 111 is placed in place, a force detection tool is used to detect the force of all the spring assemblies 142, so as to determine whether there is a loosening phenomenon.

In step S4a, it is determined whether or not the spring assembly 142 is loose, and the process proceeds to step S5 when yes, and proceeds to step S6 when no.

Step S5, part of the spring assembly 142 is loosened and is not stressed, the plate body 111 is lifted up through the hoisting equipment, the height adjusting gaskets 143 at corresponding positions are replaced according to the stress detection result, and then the step S4 is returned.

If the loosening phenomenon of part of the spring assemblies 142 is found, the thickness and the number of the required height-adjusting gaskets 142 are recalculated according to the stress detection result, the lifting plate 111 is correspondingly replaced, the stress detection is carried out again in the step S4, and the process is repeated until all the spring assemblies 142 are stressed, so that the vibration reduction effect and the track safety are ensured.

In step S6, a plurality of sealing strips 150 are installed between both sides of the board body 111 in the width direction and the base 200, thereby forming the above-mentioned buried track bed board 110.

After the plurality of buried track slabs 100 are sequentially constructed in the above steps, a position for casting the limit boss 400 is formed between two adjacent buried track slabs 100. At this position, an elastic pad 401 is placed, and concrete casting is performed to form a limit boss 400, at which time a ballast bed for mounting a track is obtained. Then, the steel rail can be transported to a working surface, and is placed in a rail bearing groove of an iron backing plate of the buckle fitting in a mode of paving the small crane to be matched with manual work, and a gauge block, a connecting bolt and a spring strip are installed. The welding between the steel rails can make a corresponding welding plan according to the line construction condition, and a field welding mode can be adopted. After the installation, the geometry of the rail was checked and the geometry was set to meet the specifications in tables 1 and 2 below.

Table 1 curve allowable deviation table

Table 2 table of permissible deviations of track geometry

Sequence number	Inspection item	Deviation requirement
			1	Fastener spacing	±5mm
2	Gauge of track	+2, -1, rate of change of no more than 1%
			3	Horizontal level	2mm
4	Twisting	2mm
			5	Rail direction	The straight line is not more than 2mm/10m chord, and the curve is shown in a positive vector deviation table 2
6	Height and low	Rail surface is visually smooth, and maximum vector is no more than 2mm/10m chord
			7	Deviation of midline	2mm
8	Elevation	±5mm
			9	Rail bottom slope	1/35～1/45

If the geometric dimensions of the steel rail do not meet the specifications of the table 1 and the table 2, the steel rail can be adjusted by adjusting the gauge blocks and moving the iron pad, and the height of the steel rail can be adjusted by adding adjusting pads with different specifications in the buckle fittings.

And finally, checking and accepting the constructed road bed board and steel rails. The acceptance of the geometric dimensions of the track is carried out according to the acceptance Standard for construction quality of railway track engineering (TB 10413). The concrete quality acceptance is carried out according to the railway track engineering construction quality acceptance standard (TB 10413) and the railway concrete and masonry engineering construction quality acceptance standard (TB 10424).

In this embodiment, the portions not described in detail are known in the art.

< example two >

The first embodiment is different from the first embodiment in that, in the first embodiment, the spring assembly of the buried vibration isolator adopts a dual anti-drop structure of a magnetic attraction bracket.

Fig. 16 is a perspective view of the spring assembly in this embodiment.

Fig. 17 is a perspective view of the spring assembly of the present embodiment at different angles.

Fig. 18 is a structural exploded view of the spring assembly in the present embodiment.

As shown in fig. 16-18, the buried vibration isolator 140 of the present embodiment further includes a magnet assembly 1425 and an anti-slip bracket 1426 as spring assemblies 142.

The magnet 1425 is used to adsorb and fix the spring assembly 142 in the mounting seat 141, in this embodiment, the mounting seat 141 is made of steel, and the magnet 1425 is a strong magnet that can adsorb with the steel. The magnet 1425 is cylindrical, and has a through mounting hole in the middle.

The middle of the top surface of the spring support upper housing 1421 also has a circular magnet mounting slot 14212 shaped and sized to mate with the magnet 1425. The middle part of the bottom surface of the magnet mounting groove 14212 is also provided with a through mounting hole, so that the magnet 1425 can be embedded and mounted in the magnet mounting groove 14212 and fixed by a connecting piece.

The falling preventive support 1426 is used to prevent the spring assembly 142 from falling off during the transportation process, thereby damaging the rubber spring therein and affecting the construction efficiency. 15-16, the anti-drop bracket 1426 includes a pair of connection plates 14261, a pair of bracket connection members 14262, and a plurality of bracket fasteners 14263.

Fig. 19 is a perspective view of the connecting plate in the present embodiment.

As shown in fig. 19, the connecting plate 14261 is a metal member, is L-shaped, and has two sections perpendicular to each other, wherein one section is provided with two fixing holes 14261a, and the other section is provided with a limit bar hole 14261b, and the length direction of the limit bar hole 14261b is consistent with the extending direction of the section.

The bracket coupling 14262 is used to movably fix one end of the connection plate 14261 having the limit bar-shaped hole 14261b on the outer circumference of the spring support upper housing 1421. As shown in fig. 16, the periphery of the upper spring supporting housing 1421 is further provided with a pair of bracket connection holes, and the bracket connection member 14262 simultaneously passes through the limit bar hole 14261b and the bracket connection hole on the upper spring supporting housing 1421, so that one end of the connection plate 14261 is connected to the upper spring supporting housing 1421, and the end can move relative to the upper spring supporting housing 1421 in the vertical direction, and the movement range is the length range of the limit bar hole 14261 b.

The bracket fixing member 14263 serves to fix the other end of the connection plate 14261 to the bottom of the spring-supported lower housing 1422.

Fig. 20 is a perspective view of the spring-supported lower case in this embodiment.

As shown in fig. 20, the bottom of the spring support lower housing 1422 further has a pair of connection plate caulking grooves 14223, which are shaped in conformity with one end of the connection plate 1461 having the fixing hole 14261a, and the connection plate caulking grooves 14223 are penetrated outwardly. A pair of web slots 14223 are oppositely disposed. Two through connecting piece mounting holes are formed at one end of the connecting plate caulking groove 14223, and the positions of the two through connecting piece mounting holes correspond to the two fixing holes 14261a of the connecting piece 1461. Therefore, the end of the connecting plate 1461 can be engaged in the connecting plate caulking groove 14223 and fixed by the bracket fixing member 14263, so that the end of the connecting plate 1461 has the function of connecting and supporting the spring support lower housing 1422.

In addition, in the present embodiment, the bracket connecting member 14262 and the bracket fixing member 14263 are screws.

Fig. 21 is a sectional view of the spring assembly in the present embodiment, and fig. 21 shows a state in which the spring assembly 142 is mounted to be completed to form one body.

As shown in fig. 21, due to the corresponding mounting groove structure, the upper surface of the magnet member 1425 is flush with the upper surface of the upper housing 1421 of the spring support, and the lower surface of the L-shaped connecting plate 14261 is flush with the lower surface of the lower housing 1422 of the spring support, so that the shape of the upper end and the lower end of the spring assembly 142 is the same as those of the first embodiment, and other components of the vibration isolator do not need to be adjusted, so that the spring assembly 142 of the present embodiment can be mounted in the same manner as the first embodiment.

Because of the dual anti-drop structure, the spring assembly 142 of the buried vibration isolator 140 of the present embodiment will not be detached during the transportation process, and the spring assembly 142 can be sucked and fixed in the mounting seat 141 after the installation is completed.

In this embodiment, the other structure and operation principle are the same as those in the first embodiment, and the spring assembly 142 of this embodiment is also installed as a whole during the track construction, so that the construction method is the same as that in the first embodiment, and the description thereof will not be repeated.

Example operation and Effect

According to the buried road bed board 110, the track bed 100 and the construction method thereof provided in the embodiment, since the buried road bed board 110 is provided with the plurality of buried vibration isolators 140, the board body 111 is arranged on the base 200 through the rubber springs 144 of the plurality of buried vibration isolators 140, that is, a point supporting mode is adopted to isolate the rigid connection between the track structure and the base structure, and the impact energy during the running of the train is absorbed through the plurality of rubber springs 144, so that the vibration and noise reduction effects of the track are realized. Further, the construction method of the embodiment combines the concept of the fabricated building, and can work simultaneously in multiple areas, multiple stations and multiple points, so that the construction precision and efficiency can be improved, specifically, the plate body 111 adopts a prefabricated concrete slab, the lower part is provided with the vibration isolator mounting groove 112, the outer cover 141 of the buried vibration isolator 140 is embedded in the vibration isolator mounting groove 112, when in construction, only the height adjusting gasket 142 and the spring support housing 143 containing the rubber spring 144 need to be placed at the vibration isolator position set on the base 200 in sequence, and then the prefabricated plate body 111 is placed on the base 200, so that the spring support housing 143 is embedded in the corresponding outer cover 141, and the construction of the buried track bed plate 100 can be completed. In addition, since the buried vibration isolator 140 of the present invention is disposed under the plate body 111 without any exposed structure above the plate body 111, the buried road bed plate 110 constructed as such has an advantage of an attractive appearance.

Further, the rubber spring 1423 is embedded and bonded in a cladding space formed by the embedding of the upper spring support housing 1421 and the lower spring support housing 1422, so that an integral elastic vibration reduction structure is formed, the rubber spring 1423 is protected, the service life of the rubber spring 1423 is prolonged, the freedom degree of the rubber spring 1423 is reasonably restrained, and the safety and the stability of the integral structure are ensured. And in the construction process, the spring assembly 142 is only required to be installed as a whole, so that the construction is convenient and quick.

In the second embodiment, the lower casing 1422 is further supported by the anti-falling bracket 1426 to cover the springs, so that the upper casing and the lower casing cannot be separated in the carrying process, the rubber springs 1423 and construction workers in the lower casing can be protected, the spring assembly 142 can be carried more conveniently, and the construction efficiency is further improved. In addition, the anti-drop bracket 1426 also makes the spring support lower housing 1422 move in the vertical direction only within a certain range relative to the spring support upper housing 1421, but cannot move horizontally or rotate, so that the degree of freedom of the rubber spring 1423 is further constrained, and the safety and stability of the overall structure are ensured.

In addition, in the second embodiment, the top of the spring assembly 142 is further provided with a strong magnet, so that the spring assembly can be adsorbed and fixed in the corresponding mounting seat 141, thereby further enhancing the stability of the overall structure.

The above examples are only for illustrating the specific embodiments of the present invention, and the present invention is not limited to the description scope of the above examples.

In the above embodiment, taking a 30m beam as an example, 7P 3500-shaped plates and 1P 4700-shaped plate are provided, 3 pairs of buried dampers 140 are provided on the P3500-shaped plate at equal intervals, and 4 pairs of buried dampers 140 are provided on the P4700-shaped plate at equal intervals. In the alternative, according to the dimensions of the overhead girder, a different number of prefabricated plate bodies 111 of different sizes may be used, and according to the corresponding proportion, a plurality of pairs of buried vibration dampers 140 may be provided, and the corresponding technical effect may be achieved.

In the above embodiment, the limiting boss 400 is a cuboid concrete platform with a guide angle, and correspondingly, two sides of the plate 111 in the length direction are provided with square limiting grooves 114 with guide angles, which are matched with the square limiting grooves, and two limiting grooves 114 of two adjacent plate 111 in opposite directions are respectively engaged with one limiting boss 400, so that a transverse limiting effect is achieved. In the alternative, the limit boss 400 may be a concrete table with other shapes, for example, a cylinder shape, and accordingly, two sides of the plate body 111 in the length direction have a semi-cylindrical limit groove 114 matched with the two sides, so that corresponding technical effects can be achieved.

In the above embodiment, the buried track bed 110 and the track bed 100 are used in an overhead track, and in practical applications, the buried track bed 110 and the track bed 100 may be used in other tracks, such as a normal track or a tunnel track.

Claims (8)

1. A buried track bed board, comprising:

a plate body; and

a plurality of buried vibration isolators embedded in the plate body,

wherein a plurality of the buried vibration isolators are arranged according to a predetermined arrangement rule,

each buried vibration isolator is provided with a mounting seat, a spring assembly, a height-adjusting gasket and a limiting column,

the mounting seat is pre-buried below the plate body,

the spring component comprises a spring support upper shell, a spring support lower shell and a rubber spring arranged in a cladding structure formed by the embedding of the spring support upper shell and the spring support lower shell,

the bottom of the spring support lower shell is provided with a limit column mounting groove,

one end of the limiting column is embedded into the limiting column mounting groove, and the other end of the limiting column is driven into the substrate.

2. The buried track bed board according to claim 1, characterized in that:

wherein the length of the plate body is 3500mm, which is used for setting 6 pairs of sleepers,

the steel rail is arranged on the sleeper,

the predetermined arrangement rule is as follows:

3 pairs of buried vibration isolators are arranged at equal intervals below the plate body,

each pair of the buried vibration isolators is disposed between two adjacent pairs of the ties,

each of the buried vibration isolators is disposed directly below the rail.

3. The buried track bed board according to claim 1, characterized in that:

wherein the length of the track plate is 4700mm, which is used for arranging 8 pairs of sleepers,

the steel rail is arranged on the sleeper,

the predetermined arrangement rule is as follows:

4 pairs of buried vibration isolators are arranged at equal intervals below the plate body,

each pair of the buried vibration isolators is disposed between two adjacent pairs of the ties,

each of the buried vibration isolators is disposed directly below the rail.

4. The buried track bed board according to claim 1, characterized in that:

wherein, the mounting seat is made of metal material,

the top of the upper spring support shell is provided with a magnet piece which can be adsorbed with the metal material, and the magnet piece is used for enabling the upper spring support shell to be adsorbed and fixed in the mounting seat.

5. A ballast bed, comprising:

the plurality of buried track bed plates are connected end to end in sequence; and

a plurality of limit bosses for transversely limiting two adjacent buried track bed plates,

wherein the buried road bed board is the buried road bed board according to any one of claims 1 to 4.

6. The ballast bed according to claim 5, comprising:

wherein the limit boss is cylindrical or cuboid,

two limiting grooves are arranged on two sides of the length direction of the plate body of the buried road bed plate, the shape of each limiting groove is matched with that of each limiting boss,

the limiting bosses are respectively clamped with the limiting grooves on the corresponding sides of the two adjacent buried road bed boards.

7. A construction method for performing elevated track construction using the buried track bed according to any one of claims 1 to 4, comprising the steps of:

step S1, setting a plurality of mounting positions of buried vibration isolators on a substrate;

step S2, for each installation position, sequentially and overlapped placing a height adjusting gasket and a spring assembly at the installation position;

s3, placing a plate body which is poured in advance on the substrate through hoisting equipment, wherein a plurality of mounting seats of the buried vibration isolators are pre-buried below the plate body, and the upper ends of the spring assemblies are respectively embedded into the corresponding mounting seats;

step S4, adopting a stress detection tool to carry out stress detection on all the spring assemblies so as to judge whether loosening phenomenon exists or not;

and S5, when the step S4 is judged to be yes, lifting the plate body through the lifting equipment, replacing the corresponding height-adjusting gasket according to the stress detection result, and returning to the step S4.

8. The construction method according to claim 7, wherein:

wherein, step S1 comprises the following sub-steps:

step S1-1, measuring the substrate through a basic mark point on the substrate, and setting the installation position of the buried vibration isolator based on a measurement result;

s1-2, driving each limit column into the substrate according to the installation position,

in step S2, when the height-adjusting spacer and the spring assembly are placed on the substrate, the limit post passes through the abdication hole of the height-adjusting spacer, and one end of the limit post is embedded into the limit groove at the bottom of the spring support lower shell of the spring assembly.