CN206538637U - A kind of track strengthening device for existing railway - Google Patents

Abstract

The utility model discloses a line reinforcement device for existing railways, which belongs to the technical field of traffic facility construction. The device includes D24 construction convenience beams, support piles and buckle rail beams. Among them, the D24 construction convenience beam includes longitudinal beams, improved beams, corbels and connecting plates, and the fastening rail beams include rail beams, steel buckle plates and U-shaped bolts. Longitudinal beams and improved beams are connected through corbels and connecting plates. Longitudinal beams are located on support piles arranged on both sides of the line. Improved beams are installed under the running rails at equal intervals and vertical to the existing line. The top surface of the improved beams and the The existing concrete sleeper is of equal height, on which is laid buckle rail beam, the buckle rail beam is composed of 5 steel rails, and the buckle rail beam and the improved beam below are connected together with steel buckle plate and U-shaped bolts. The reinforcement device for existing railway lines of the utility model has strong bearing capacity, simple operation, safety and stability, can adapt to complex environments, ensures the smoothness requirements of existing railway lines, and has good reinforcement effect.

Description

A Line Strengthening Device for Existing Railways

technical field

The utility model relates to a line reinforcing device for existing railways, which belongs to the technical field of traffic facility construction.

Background technique

With the continuous development of my country's economic construction, the construction of railways and urban subways continues to increase, and tunnels or shields pass through existing railway lines, and existing bridges and culverts are jacked up from time to time. In order to achieve the construction purpose and ensure the existing In order for the railway to be transported safely and smoothly, a reliable reinforcement method for the existing railway lines is a problem that must be faced.

At present, the reinforcement methods of existing railways in operation mainly include buckling rail beam method, vertical lifting and horizontal lifting method, D-shaped concrete beam reinforcement method, continuous construction concrete beam method and other methods. The buckle rail beam method is simple and easy to operate, but the reinforcement effect is poor; the vertical lifting and horizontal lifting reinforcement method uses support piles to support the I-beam or rail beam longitudinal beam, and then the longitudinal beam and the lower I-beam horizontal beam are lifted by U-shaped bolts. The connection is fixed to form a horizontal lifting and vertical lifting reinforcement line. The structure is complex and unstable, and the safety risk is relatively high. It is not recommended to use it; the D-shaped beam reinforcement method is to support the longitudinal beam components of the steel beam on the support pile or pier The line reinforcement method in which the upper and cross beam members lift the track horizontally, and the vertical and horizontal beams are assembled and connected to form an overall overhead line. It cannot be used when the radius is small; the continuous construction convenient beam method uses the method of equal-strength connection of large-scale I-beams with fixed modulus to form a long-span continuous beam, and sets one or more fulcrums in the middle to form a statically indeterminate structure. The large I-beams used in the method have insufficient lateral rigidity and poor stability, which is unfavorable to driving safety.

Utility model content

The technical problem to be solved by the utility model is to provide a line reinforcement device with simple operation, safety and stability, strong bearing capacity, and adapting to the small line spacing and large span of the double-line railway section, so as to solve the problem of shield tunneling under the existing railway. , Bridge and culvert jacking and other technical issues affecting the line.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a line reinforcement device for existing railways, the key technology of which is: it includes D-shaped construction beams, which are arranged on both sides of the existing railway lines Support piles and buckle rail beams;

The D-shaped construction beam includes a longitudinal beam arranged on the support pile and an improved crossbeam perpendicular to the longitudinal beam, and the longitudinal beam and the improved crossbeam are connected by a corbel and a connecting plate;

The fastening rail beam includes a rail beam arranged on the improved beam, and the rail beam is connected with the improved beam by means of a steel buckle plate and U-shaped bolts.

Preferably, the D-shaped construction girder is a D24-type construction girder.

The existing railway line includes concrete sleepers and running rails.

Preferably, the longitudinal beam and the improved cross beam are connected by bolts through corbels and connecting plates.

Preferably, the improved beam is 2.96m long, which is 1m shorter than the beam of the original D24 type construction beam, and the other dimensions and structures remain unchanged.

Preferably, the improved crossbeams are installed under the running rail at equal intervals, and are arranged perpendicular to the existing railway line, and insulating rubber pads and backing plates are added at the junction with the running rail.

Preferably, the top surface of the improved beam is at the same height as the concrete sleeper.

Preferably, the rail beam is composed of five 60kg/m steel rails.

Preferably, the U-shaped bolts are made of Φ22 round steel, with M22 threads at both ends.

The beneficial effects produced by adopting the above-mentioned technical scheme are:

The utility model is developed based on the advantages and disadvantages of various lines such as the buckle rail beam method, the vertical and horizontal lifting method, the D-shaped convenient beam reinforcement method, and the continuous construction convenient beam method, which can meet the high requirements of the railway for smoothness of the line. It has the advantages of relatively simple structure, safety and stability, better reinforcement effect, and adapts to the smaller line spacing and larger span of double-track railway sections. It provides a line reinforcement device for existing railways that does not affect the construction below the line. .

1) The device uses buckle rail beams and D-shaped beams at the same time, and adds buckle rail beams to the high-stability D-type beam structure to make the long-range overhead lines more stable and ensure the smoothness of the railway lines It can ensure the reinforcement effect of the line and the safety of driving.

2) The improved crossbeam shortens the length of the original D24 type beam, which can adapt to the situation where the line spacing of the double-track railway section is small.

3) The longitudinal beam of the device can meet the underpass construction with a span of no more than 24 meters.

4) After reinforcement, the construction under the line can be carried out without affecting the driving safety and without interrupting the driving, such as shield tunneling, bridge and culvert jacking, etc., saving the construction period.

Description of drawings

Fig. 1 is the schematic diagram of the utility model;

Fig. 2 is a schematic side view of the utility model;

Fig. 3 is the schematic diagram of corbel;

Fig. 4 is a schematic side view of Fig. 3;

Fig. 5 is the schematic diagram of U-bolt;

Figure 6 is a schematic top view of Figure 5;

Fig. 7 is the schematic diagram of connecting plate;

Figure 8 is a schematic top view of Figure 7;

Among them, 1-1 is the longitudinal beam, 1-2 is the improved beam, 1-3 is the corbel, 1-4 is the connecting plate; 2 is the supporting pile; 3 is the fastening rail beam, 3-1 is the rail beam, 3 -2 is the steel gusset, 3-3 is the U-shaped bolt; 4-1 is the existing concrete sleeper, and 4-2 is the driving rail.

detailed description

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail:

Referring to accompanying drawing 1-accompanying drawing 8, present embodiment comprises D24 type construction convenient beam, support pile 2 and fastening rail beam 3 on the basis of existing railway line. Among them, the D24 construction convenience beam includes longitudinal beam 1-1, improved beam 1-2, corbel 1-3 and connecting plate 1-4, buckle rail beam 3 includes rail beam 3-1, steel buckle plate 3-2 and U-shaped bolts 3-3, the existing railway line includes existing concrete sleepers 4-1 and driving rails 4-2. The longitudinal beam 1-1 and the improved beam 1-2 are connected by bolts through the corbel 1-3 and the connecting plate 1-4, the longitudinal beam 1-1 is located on the supporting piles 2 arranged on both sides of the line, the improved beam 1-2, etc. The spacing is set under the driving rail 4-2, and it is set perpendicular to the existing line. The top surface of the improved beam 1-2 is equal to the existing concrete sleeper 4-1, and the buckle rail beam 3 is laid on it, and the buckle rail beam 3 adopts The rail bundle beam 3-1 that 5 60kg/m steel rails forms, buckle rail beam and the improved beam 1-2 below it are connected together with steel buckle plate 3-2 and Φ22U type bolt 3-3.

The improved crossbeam 1-2 is 2.96m long, which is 1m shorter than the crossbeam of the original D24 type construction beam, and the other dimensions and structures remain unchanged.

Insulating rubber pads and backing plates are added at the junction of the improved beam 1-2 and the driving rail 4-2 to strengthen the rail surface and reduce interference to electrical signals.

The support piles 2 not only meet the bearing requirements of the beam, but also can play the role of reinforcing the railway subgrade.

Each corbel connecting the longitudinal beam and the improved beam 1-2 is composed of two left and right corbels. The U-shaped bolts are made of Φ22 round steel, with M22 threads at both ends. The gap between the buckle rail beam and the U-bolt joint is filled with sawdust filler blocks to ensure that the buckle rail beams do not shift each other.

The installation process of this reinforcing device for existing railway lines will be described below through specific examples.

The foundation bed should be tamped before installation to ensure the stability of the ballast bed, and the stress relief and welding of the seamless line should be carried out, and the change of rail temperature should be monitored.

(1) Set support pile 2

Set support piles 2 on both sides of the existing line by using the train blockage time, and construct in strict accordance with the design size and requirements, and put it into use after reaching the strength. These supporting piles 2 should not only meet the load-bearing requirements of the beams, but also play a role in reinforcing the railway embankment.

(2) The improved crossbeam 1-2 is worn under

Penetrate the improved beam 1-2 without disturbing the concrete sleeper 4-1 as far as possible, and vibrate the ballast under the beam in advance, and add insulating pads and pads at the junction of the improved beam 1-2 and the driving rail 4-2 plate to strengthen the rail surface and reduce interference to electrical signals.

(3) Lay buckle rail beam 3

Lay the buckle rail beam 3 on the improved beam. The buckle rail beam 3 adopts the rail beam 3-1 of five 60kg/m rails, the joints are staggered by more than 2m, and the improved crossbeam 1-2 below it is connected together with a steel buckle plate 3-2 and a Φ22 U-shaped bolt 3-3.

(4) laying stringer 1-1

Place the longitudinal beam 1-1 of the D24 type construction convenience beam 1 on the prepared support pile 2, and at the same time, pass the longitudinal beam 1-1 and the improved beam 1-2 through the corbel 1-3 and the connecting plate 1-4 Use bolts.

Claims (9)

1. A line reinforcement device for existing railways, characterized in that: it comprises D-shaped construction beams (1), support piles (2) and rail buckle beams (3) that are arranged on both sides of existing railway lines ; The D-shaped construction beam includes a longitudinal beam (1-1) arranged on the support pile (2) and an improved crossbeam (1-2) vertically arranged to the longitudinal beam (1-1), and the longitudinal beam (1-1) is connected with the improved beam (1-2) through a corbel (1-3) and a connecting plate (1-4); The buckle rail beam (3) includes a rail beam (3-1) arranged on the improved beam (1-2), and the rail beam (3-1) is supported by a steel buckle plate (3-2) and a U Type bolt (3-3) is connected with improved beam (1-2). 2. The line reinforcement device for existing railways according to claim 1, characterized in that: the D-shaped construction girder (1) is a D24-type construction girder. 3. The line reinforcement device for existing railways according to claim 1, characterized in that: said existing railway lines include concrete sleepers (4-1) and driving rails (4-2). 4. The line reinforcement device for existing railways according to claim 1, characterized in that: the longitudinal beam (1-1) and the improved beam (1-2) are connected by a corbel (1-3) and The plates (1-4) are connected using bolts. 5. The line reinforcement device for existing railways according to claim 2, characterized in that: the improved beam (1-2) is 2.96m long, which is 1m shorter than the beam of the original D24 construction beam. 6. A line reinforcement device for existing railways according to claim 3, characterized in that: the improved beams (1-2) are equidistantly installed under the running rails (4-2), and are connected to the existing railways There are railway lines arranged vertically, and insulating rubber pads and backing plates are additionally provided at the junction with the driving rail (4-2). 7. The line reinforcement device for existing railways according to claim 3, characterized in that: the top surface of the improved beam (1-2) is at the same height as the concrete sleeper (4-1). 8. The line reinforcement device for existing railways according to claim 1, characterized in that: said rail beam (3-1) is composed of five 60kg/m steel rails. 9. The line reinforcement device for existing railways according to claim 1, characterized in that: the U-shaped bolts (3-3) are made of Φ22 round steel, with M22 threads at both ends.