CN205077336U - A embedded track structure for in tunnel - Google Patents

Abstract

The utility model discloses an embedded track structure used in a tunnel, which comprises a prefabricated integral ballastless track slab, the two sides of the top of the prefabricated integral ballastless track slab are longitudinally provided with rail bearing grooves, and the rest of the upper surface is Plane, the rail is embedded in the rail groove, and a number of noise reduction blocks are arranged on both sides, and a horizontal adjustment wedge block is set between the noise reduction block and the side wall of the rail groove. The rest of the space in the rail groove Filled with polymer castables, the bottom of the prefabricated integral ballastless track slab is provided with a cavity and installed on the convex block at the top of the convex foundation, and the self-compacting concrete is poured from the grouting hole of the prefabricated integral ballastless track slab The gap between the two is injected to fix the two. The beneficial effect of the utility model is that the rails are embedded as a whole, and traditional fasteners are no longer used, which reduces the overall height of the rail system and facilitates the entry of fire-fighting and rescue vehicles.

Description

An embedded track structure used in tunnels

technical field

The utility model relates to an embedded track structure used in a tunnel, which belongs to the technical field of rail transportation.

Background technique

In the traditional tunnel track system, whether it is a ballasted track system or a ballastless track system, the steel rails are higher than the lower sleepers or prefabricated integral ballastless track slabs. The disadvantage of this structure is that it is very inconvenient for wheeled vehicles to drive in the tunnel, especially when an accident occurs in the tunnel, it will seriously affect ordinary fire fighting and rescue vehicles entering the tunnel to implement fire rescue.

In the currently disclosed embedded track, the lateral adjustment of the rail is to push the lateral movement of the cage and the rail by adjusting the relative sliding of the wedge block on the cage. However, adjusting the wedge block vertically may cause the vertical position of the rail to move, which affects the elevation of the rail. Therefore, this embedded track is not convenient for construction.

Utility model content

The purpose of the invention of this utility model is to provide an embedded track structure used in tunnels to overcome the uneven surface of the traditional track structure which affects the passage of fire-fighting and rescue vehicles. In addition, the utility model also solves the problem that the horizontal adjustment wedge block in the current embedded track will affect the elevation of the rail by providing the noise reduction block and the lateral adjustment wedge block.

The technical scheme that the utility model adopts is such:

An embedded track structure used in tunnels, comprising a prefabricated integral ballastless track slab, the two sides of the top of the prefabricated integral ballastless track slab are longitudinally provided with rail grooves, the rest of the upper surface is flat, and the bearing In the rail groove, from bottom to top, there are under-rail elastic pads, under-rail height-adjusting pads, and rails. Several noise-reducing blocks are arranged on both sides of the rails. One side of each noise-reducing block is in contact with the surface of the rail waist. Fitting, a horizontal adjustment wedge block is set between the other side and the side wall of the rail bearing groove, and the remaining space in the rail bearing groove is filled with polymer castables. The bottom of the prefabricated integral ballastless track plate is provided with a cavity and installed on the The horizontal and vertical limit is realized on the convex block at the top of the convex foundation, the depth of the cavity is smaller than the height of the convex block, the length and width of the cavity are respectively greater than the length and width of the convex block, and the convex block at the top of the convex foundation is embedded After the cavity at the bottom of the prefabricated integral ballastless track slab is prefabricated, self-compacting concrete is injected into the gap between the two from the grouting holes on the prefabricated integral ballastless track slab. Self-compacting concrete connects the convex foundation and the prefabricated monolithic ballastless track slab into one.

Preferably, the cross-section of the rail-supporting groove is U-shaped, and the bottom surface of the rail-supporting groove is inclined downward toward the transverse middle part of the prefabricated integrated ballastless track slab. The inclination of the bottom of the rail bearing groove is equivalent to the effect of the rail bottom slope. The rail bottom slope can improve the contact relationship between the rail and the wheel set of the vehicle, and reduce the abnormal wear of the rail

Preferably, the grouting hole is small at the top and large at the bottom to facilitate the flow of self-compacting concrete.

Preferably, several noise reduction blocks are arranged at equal intervals along the longitudinal direction of the rail. For further optimization, the noise reduction block is divided into a noise reduction block with a slope and a noise reduction block without a slope. The noise reduction block without a slope is in contact with the lateral adjustment wedge block. The side contacting with the lateral adjustment wedge block is divided into three sections, the two ends are planes with slopes, and the middle part is a vertical plane. Several noise reduction blocks without slopes are evenly arranged between the two noise reduction blocks with slopes. The prefabricated noise reduction block can effectively reduce the workload of pouring polymer castables on site, and can achieve the purpose of adjusting the lateral stiffness of the rail. The elastic modulus of the cast-in-place polymer material and the prefabricated noise reduction block are different, one is softer and the other is harder. The purpose of adjusting the stiffness of the track system can be achieved through the combination of soft and hard materials. The cooperation of the noise reduction block with the slope and the lateral adjustment wedge block also has the effect of adjusting the lateral position of the rail.

As a preference, the polymer castable in the rail bearing groove has different heights on both sides of the rail, the inner side of the rail is shorter and the outer side of the rail is higher. The polymer castable is designed with a low inner side and a high outer side, which can meet the normal passage of the wheel set and rim of the train.

In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

Embed the rail as a whole into the track slab, no longer use traditional fasteners, and effectively reduce the overall height of the track system;

It is very suitable for ordinary firefighting and rescue vehicles to drive and enter, and overcomes the shortcomings of the commonly used track structure at present.

The noise reduction block that moves longitudinally along the track to adjust the horizontal position of the rail overcomes the influence on the elevation of the rail when the current embedded track system adjusts the horizontal position of the rail.

Description of drawings

Figure 1 is a schematic cross-sectional view of the present invention.

Fig. 2 is an enlarged schematic view of the rail bearing groove in the present invention.

Fig. 3 is a top view of the prefabricated integrated ballastless track slab in the present invention.

Figure 4 is a cross-sectional view of the middle part of the prefabricated integral ballastless track slab of Figure 4 .

Marks in the figure: 1 is the prefabricated integral ballastless track slab, 2 is the polymer castable, 3 is the steel rail, 4 is the noise reduction block, 5 is the horizontal adjustment wedge block, 6 is the under-rail height adjustment plate, and 7 is under the rail Elastic pad, 8 is self-compacting concrete, 9 is a convex foundation, 1-1 is a rail bearing groove, and 1-2 is a cavity.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in detail.

Best practice:

As shown in Figures 1, 2, and 3, an embedded track structure used in tunnels includes a prefabricated integral ballastless track slab 1, and support rails are longitudinally provided on both sides of the top of the prefabricated integral ballastless track slab 1. Groove 1-1, the remaining parts of the upper surface are flat, and the rail bearing groove 1-1 is provided with an under-rail elastic backing plate 7, an under-rail height-adjusting backing plate 6, and a rail 3 from bottom to top, and the two sides of the rail 3 A number of noise reduction blocks 4 are respectively arranged, and one side of each noise reduction block 4 is attached to the surface of the rail waist of the rail 3, and a horizontal adjustment wedge block 5 is arranged between the other side and the side wall of the bearing groove 1-1, and the bearing The rest of the space in the track groove 1-1 is filled with polymer castables 2, and the prefabricated integral ballastless track slab 1 is provided with a cavity 1-2 at the bottom and installed on the convex block at the top of the convex foundation 9 to realize horizontal and vertical control. The depth of the cavity 1-2 is less than the height of the convex block, the length and width of the cavity 1-2 are respectively greater than the length and width of the convex block, and the convex block on the top of the convex foundation 9 is embedded in the prefabricated integral ballastless After the cavity 1-2 at the bottom of the track slab 1, self-compacting concrete 8 is injected into the gap between the two from the grouting hole on the prefabricated integral ballastless track slab 1 .

The cross-section of the rail-supporting groove 1-1 is U-shaped, and the bottom surface of the rail-supporting groove 1-1 is inclined downward toward the lateral middle part of the prefabricated integral ballastless track slab 1 .

The grouting hole is small at the top and large at the bottom.

A plurality of noise reduction blocks 4 are arranged at equal intervals along the longitudinal direction of the steel rail 3 . For further optimization, the noise reduction block 4 is divided into a noise reduction block with a slope and a noise reduction block without a slope. The side of the noise reduction block without a slope that contacts the lateral adjustment wedge block 5 is a plane. The side of the noise block 4 in contact with the lateral adjustment wedge block 5 is divided into three sections, the two ends are planes with a slope, and the middle part is a vertical plane. Several noise reduction blocks without slopes are evenly arranged between the two noise reduction blocks with slopes.

The polymer castable 2 in the rail bearing groove 1-1 has different heights on both sides of the rail 3, the inner side of the rail 3 is shorter, and the outer side of the rail 2 is higher.

Claims (7)

1. An embedded track structure used in a tunnel, including a prefabricated integral ballastless track slab (1), characterized in that: the two sides of the top of the prefabricated integral ballastless track slab (1) are longitudinally provided with supporting rails Groove (1-1), the remaining part of the upper surface is flat, and the rail bearing groove (1-1) is provided with an elastic backing plate (7) under the rail, an under-rail height-adjusting backing plate (6), and rails from bottom to top. (3), a number of noise reduction blocks (4) are arranged on both sides of the rail (3), and one side of each noise reduction block (4) is attached to the rail waist surface of the rail (3), and the other side is attached to the rail waist surface of the rail (3). Horizontal adjustment wedges (5) are arranged between the side walls of the rail support groove (1-1), and the remaining space in the rail support groove (1-1) is filled with polymer castables (2). The prefabricated integral ballastless track A cavity (1-2) is set at the bottom of the plate (1) and installed on the convex block at the top of the convex foundation (9) to realize lateral and longitudinal limitation. The depth of the cavity (1-2) is smaller than the height of the convex block , the length and width of the cavity (1-2) are respectively greater than the length and width of the convex block, and the convex block on the top of the convex foundation (9) is embedded in the prefabricated integral ballastless track slab (1) bottom cavity (1-2) Finally, self-compacting concrete (8) is injected into the gap between the two from the grouting hole on the prefabricated integral ballastless track slab (1). 2. An embedded track structure used in tunnels according to claim 1, characterized in that: the cross-section of the rail support groove (1-1) is U-shaped, and the rail support groove (1-1) The bottom surface of the prefabricated integral ballastless track slab (1) slopes downward towards the transverse middle part. 3 . The embedded track structure used in tunnels according to claim 1 , wherein the grouting holes are small at the top and large at the bottom. 4. An embedded track structure for use in tunnels according to claim 1, characterized in that a number of noise reduction blocks (4) are arranged at equal intervals along the longitudinal direction of the rail (3). 5. An embedded track structure used in tunnels according to claim 1 or 4, characterized in that: the noise reduction block (4) is divided into a noise reduction block with a slope and a noise reduction block without a slope Block, the side of the noise reduction block without a slope in contact with the horizontal adjustment wedge (5) is a plane, the side of the noise reduction block with a slope (4) in contact with the horizontal adjustment wedge (5) is divided into three sections, and the two ends It is a plane with a slope, and the middle part is a vertical plane. 6 . The embedded track structure used in tunnels according to claim 5 , wherein a number of noise reduction blocks without slopes are evenly arranged between every two noise reduction blocks with slopes. 7 . 7. The embedded track structure used in the tunnel according to claim 1, characterized in that: the polymer castable (2) in the rail support groove (1-1) is placed on both sides of the rail (3) The side heights are different, the inner side of the steel rail (3) is shorter, and the outer side of the steel rail (3) is higher.