CN108708228A - The automatic compensation steel sleeper of symmetrical inclined block self locking formula sedimentation - Google Patents

Abstract

A kind of automatic compensation steel sleeper of symmetrical inclined block self locking formula sedimentation, its main feature is that rail is connect by fastener with lifter plate, lifter plate bottom is bonded at the top of symmetrical bearing skewback respectively, lifter plate, bearing skewback are installed in steel sleeper inner cavity, it is connected to pre-compressed spring between symmetrical bearing skewback, the bottom for supporting skewback is contacted with steel sleeper inner bottom surface；The two sides of bearing skewback are provided with limit sawtooth, and the limit sawtooth supported on skewback is intermeshed with the sawtooth resetted on Saw blade, is resetted Saw blade and is consolidated with bolt one end is resetted, and is resetted Saw blade and is connected by resetting spring with steel sleeper inner wall.There is the automatic compensation steel sleeper of symmetrical inclined block self locking formula sedimentation of the present invention simple in structure, at low cost, performance to stablize, the features such as can automatically adjusting, it is supported using lifter plate contact with supporting between skewback, pass through the trigger action for limiting sawtooth with resetting sawtooth intermeshing effect and steel rail spring restoring force on Saw blade, automatically adjust rail height, compensated foundation sedimentation.

Description

Symmetrical inclined block self-locking settlement automatic compensation steel sleeper

technical field

The invention relates to railway traffic equipment, in particular to a symmetrical oblique block self-locking type subsidence automatic compensation steel sleeper.

Background technique

At present, the development of my country's railways must be based on the premise of high stability, high comfort, and high safety. Therefore, the high stability of the foundation under the rails must be guaranteed. The settlement of the under-rail foundation has a significant impact on the stability of the under-rail foundation. Problems such as local subsidence and uneven settlement during the operation of the line will seriously affect the driving safety and passenger comfort. When the train passes by at high speed, the vehicle-track interaction force is intensified, resulting in unevenness of the line, accelerating the deterioration of the track line condition, shortening the maintenance cycle of the track line, increasing the maintenance and repair cost of the track line, and seriously threatening the traffic. Safety.

The formation of foundation settlement under the railway track is often produced by multiple parts and the result of the joint action of various factors. The parts where the settlement occurs are mainly located in the subgrade bed, foundation and ballast bed, and the main influencing factors are as follows: ①Settlement caused by structural factors; ②Settlement caused by external natural factors; ③Settlement caused by human activities; ④Regional settlement caused by groundwater level; ⑤Inhomogeneous settlement caused by differences in transitional sections. Among the five factors that cause railway line settlement, the three most prominent are the settlement caused by structural factors, the settlement caused by external natural factors, and the uneven settlement caused by differences in transition sections. The location where the settlement disease occurs is mainly the foundation and the bottom of the foundation bed. The treatment methods for deep subsidence of foundation and subgrade bed mainly include local replacement and filling reinforcement method, compaction pile reinforcement method, geosynthetic material reinforcement method and grouting reinforcement method, etc.

In order to reduce the sudden change in line stiffness between different line structures, it is necessary to set transition sections at the junctions between ballastless track and ballasted track, subgrade and bridge culvert, subgrade and tunnel, and embankment and cutting, so as to realize the change of line stiffness within the transition section. Gradient transition. The commonly used treatment methods for the transition section are: 1. On the soft side of the transition section, increase the stiffness of the subgrade to reduce the settlement of the embankment. The specific treatment methods are as follows: ① gravel high-quality material filling method; ② reinforced soil method; ③ use light materials with good mechanical properties, such as: EPS, artificial air bubble concrete, etc.; ④ transition plate method; ⑤ For the transitional section located in the soft soil area, it may also be considered to be filled with lightweight materials, such as fly ash and other fillers. 2. On the softer side of the transition section, increase the vertical stiffness of the track. The specific treatment methods are as follows: ①enhance the vertical stiffness of the track by adjusting the length of the sleepers and the distance between the ties; ②improve the stiffness of the track by increasing the stiffness of the rail row; ③improve the stiffness of the track by thickening the thickness of the ballast bed. 3. On the harder side of the transition section, reduce the vertical stiffness of the track. The specific treatment methods are as follows: ① put a soft rubber pad under the rail of the track line; ② pad a high elastic rubber pad under the sleeper; ③ increase the thickness of the ballast on the bridge and in the tunnel; Adjust the vertical stiffness of the track.

The above measures have a good effect on reducing the settlement of the line and the stiffness change rate between different line structures, but they cannot solve the unevenness of the rail surface on both sides caused by the uneven settlement of the subgrade and the unevenness of the rail surface caused by the difference in stiffness between different structures. Bending problem, lack of automation and real-time performance, cumbersome rectification technology and cost a lot of financial and manpower for maintenance and repair, so it has certain limitations.

Contents of the invention

The object of the present invention is to provide a symmetrical oblique block self-locking settlement automatic compensating steel sleeper with simple structure, low cost, stable performance and automatic adjustment.

The symmetrical inclined block self-locking settlement automatic compensation steel sleeper of the present invention includes a steel sleeper, a lifting plate, and a supporting inclined block. It is characterized in that the rail is connected to the lifting plate through fasteners, and the bottom of the lifting plate is the same as the two structures and symmetrical. The top of the distributed supporting inclined blocks is attached, the lifting plate and the supporting inclined blocks are installed in the inner cavity of the steel pillow, and the pre-compressed spring is connected between the two symmetrical supporting inclined blocks. The pre-compressed spring is provided with sufficient pre-compression before work. The bottom of the supporting inclined block is in contact with the inner bottom surface of the steel pillow, and the contact surface is smooth; both sides of the supporting inclined block are provided with limiting sawtooth, and the limiting sawtooth on the supporting inclined block and the sawtooth on the reset sawtooth bar mesh with each other , the reset sawtooth bar is consolidated with one end of the reset bolt, the other end of the reset bolt passes through the inner wall of the steel sleeper on the outside of the steel sleeper, and the reset sawtooth bar is connected with the inner wall of the steel sleeper through a reset spring.

The symmetrical oblique block self-locking subsidence automatic compensating steel sleeper of the present invention has the following working principle. When the train wheel passes by, the force generated by the wheel on the rail is transmitted to the ballast bed through the lifting plate, the supporting oblique block and the bottom of the steel sleeper. At this time The lifting plate is closely attached to the supporting inclined block, the limit sawtooth and the sawtooth on the reset sawtooth bar are meshed with each other, and the steel sleeper and the rail move together; if the ballast bed settles, the steel rail will produce elastic bending deformation downward, when the train wheel leaves When the elastic deformation of the rail recovers, a large upward elastic force is generated, that is, the rail drives the lifting plate to move upward together. At this time, the lifting plate and the supporting inclined block are out of contact, and the supporting inclined block loses its force on the contact slope. , the force is unbalanced, and then the symmetrical supporting inclined blocks move towards the direction of the lifting plate under the action of the pre-compression force of the pre-compressed spring. The sawtooth presses and resets the sawtooth on the sawtooth bar so that the return spring is compressed, and the supporting inclined block moves toward the lifting plate until it fits closely with the inclined surface of the lifting plate, forming a new mechanical balance system, that is, the supporting inclined block is stationary, and the lifting The upward displacement of the plate just compensates the settlement of the ballast bed. When the train wheel passes by again, the limit sawtooth and the sawtooth on the reset sawtooth bar mesh with each other, resulting in an interlocking effect, and the force transmitted downward will not change the relative position between the lifting plate and the supporting inclined block, and the wheel will produce a force on the rail. The active force is still transmitted to the ballast bed through the lifting plate, the supporting inclined block and the bottom of the rail. If the ballast bed does not settle, the overall height of the device remains unchanged; if the ballast bed settles at this time, repeat the above adjustment process again. When it is found that the lifting plate is higher than the initial position by a certain amount, the reset bolt can be manually turned to make the reset sawtooth bar move towards the inner wall of the steel pillow under the action of the return spring, and then the sawtooth of the reset sawtooth is out of contact with the limit sawtooth, and the two A symmetrically distributed supporting inclined block will move inward under the action of the lifting plate's own weight, that is, the pre-compression spring is compressed. When the compression reaches the initial pre-compression, tighten the reset bolt to restore it to the original position. At this point, the reset operation Finish.

The symmetrical inclined block self-locking subsidence automatic compensating steel sleeper of the present invention has the characteristics of simple structure, low cost, stable performance, and automatic adjustment. The intermeshing action of the teeth on the sawtooth bar and the triggering action of the elastic recovery force of the rail automatically adjust the height of the rail and compensate for the settlement of the foundation.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Figure 2 is a schematic diagram of the top view of Figure 1;

1. Steel rail, 2. Steel sleeper, 3. Lifting plate, 4. Supporting inclined block, 5. Preload spring, 6. Limit sawtooth, 7. Reset bolt, 8. Return spring, 9. Reset sawtooth bar.

Detailed ways

A symmetrical inclined block self-locking settlement automatic compensation steel sleeper, comprising a steel sleeper 2, a lifting plate 3, and a supporting inclined block 4. The tops of two supporting inclined blocks 4 with the same structure and symmetrically distributed are attached together, and the lifting plate 3 and the supporting inclined blocks 4 are installed in the inner cavity of the steel sleeper 2. The preload spring 5 is connected between the two symmetrical supporting inclined blocks 4, and the supporting The bottom of the inclined block 4 is in contact with the inner bottom surface of the steel pillow 2, and the contact surface is smooth; both sides of the supporting inclined block 4 are provided with limiting sawtooth 6, and the limiting sawtooth 6 on the supporting inclined block 4 is connected to the reset sawtooth bar 9. The sawtooth meshes with each other, reset sawtooth bar 9 is consolidated with reset bolt 7 one end, and the other end of reset bolt 7 passes through steel sleeper 2 inner wall on the steel sleeper outside, reset sawtooth bar 9 links to each other with steel sleeper 2 inner wall by return spring 8.

Claims (2)

1. A symmetrical inclined block self-locking settlement automatic compensation steel sleeper, including a steel sleeper (2), a lifting plate (3), and a supporting inclined block (4), characterized in that: the rail (1) passes through the fastener and the lifting plate (3) Connection, the bottom of the lifting plate (3) is respectively attached to the top of two supporting inclined blocks (4) with the same structure and symmetrically distributed, and the lifting plate (3) and supporting inclined blocks (4) are installed on the steel sleeper (2) ) in the inner cavity, a preloaded spring (5) is connected between two symmetrical supporting inclined blocks (4), and the bottom of the supporting inclined block (4) is in contact with the inner bottom surface of the steel sleeper (2), and the contact surface is smooth; Limiting sawtooths (6) are provided on both sides of the supporting inclined block (4), and the limiting sawtooth (6) on the supporting inclined block (4) meshes with the sawtooth on the reset sawtooth bar (9), and the reset sawtooth bar (9) ) and one end of the reset bolt (7), the other end of the reset bolt (7) passes through the inner wall of the steel sleeper (2) outside the steel sleeper, and the reset sawtooth bar (9) and the inner wall of the steel sleeper (2) pass through the return spring (8 ) connected. 2. The symmetrical inclined block self-locking settlement automatic compensating steel sleeper according to claim 1, characterized in that: the bottom of the supporting inclined block (4) is in smooth contact with the inner bottom surface of the steel sleeper (2).