Longitudinal connection base plate anchoring structure with bridge abutment and end spines combined

Abstract

The utility model discloses a bridge abutment and end thorn combined longitudinal connection base plate anchoring structure, which belongs to the field of rail transit bridge engineering, and comprises a bearing platform and a wall body arranged at the top of the bearing platform, on one hand, the wall body is in anchoring connection with the end part of a longitudinal connection base plate, and the bearing platform and the wall body can form an end thorn structure; the longitudinal force of the longitudinally connected base plate is transmitted to the roadbed; on the other hand, the bearing platform and the wall body can form a bridge abutment structure, and the side face, close to the bridge, of the bearing platform exceeds the side face, close to the bridge, of the wall body for supporting the bridge end. According to the longitudinal connection base plate anchoring structure with the bridge abutment and the end spines combined, the bridge abutment and the end spines are combined into a whole, one structure can support the bridge beam end and anchor the longitudinal connection base plate, the work amount of two structures is reduced to one structure, the work amount of rail transit bridge engineering is reduced, and manufacturing cost is saved.

Description

Technical Field

[0001] The utility model belongs to the field of rail transit bridge engineering, and particularly relates to a longitudinal connection base plate anchoring structure combining a bridge abutment and a terminal spike. Background Art

[0002] The CRTS II type slab ballastless track is a ballastless track structure form introduced, digested, absorbed and re-innovated in China's high-speed railways, and occupies an important proportion in the construction of ballastless tracks for high-speed railways in China.

[0003] The CRTS II type slab ballastless track system is provided with a longitudinal multi-layer continuous structure in the vertical direction, making its longitudinal force system relatively complex. The CRTS II type slab ballastless track system in the bridge section isolates the influence of the longitudinal displacement difference between the rail and the bridge through the longitudinal connection base plate. Therefore, strict anchoring must be carried out at both ends of the longitudinal connection base plate. Generally, a terminal spike structure is usually set behind the bridge abutment to anchor the end of the longitudinal connection base plate. As Figure 1 shown, the longitudinal force of the longitudinal connection base plate is transmitted to the subgrade to ensure that the longitudinal displacement of the longitudinal connection base plate under the action of temperature and load meets the stability requirements for the normal use of the track structure.

[0004] The bridge abutment is an important part of the bridge and is located at both ends of the bridge. In addition to supporting the bridge span structure, it also needs to retain the subgrade fill, resist the earth pressure of the embankment, ensure that the bridge abutment does not slip and overturn, and should make the connection between the bridge and the embankment smooth. Both the bridge abutment and the terminal spike are located at both ends of the bridge. When their positions are relatively close, the construction processes of the two structures will affect each other, and the engineering quantities for simultaneous construction or separate construction of the two structures are both large. Summary of the Utility Model

[0005] In view of one or more of the above defects or improvement requirements in the prior art, the utility model provides a longitudinal connection base plate anchoring structure combining a bridge abutment and a terminal spike, which realizes supporting the bridge beam end and anchoring the longitudinal connection base plate while reducing the engineering quantity of the rail transit bridge and saving the cost.

[0006] To achieve the above object, the utility model provides a longitudinal connection base plate anchoring structure combining a bridge abutment and a terminal spike, which is applicable to the CRTS II type slab ballastless track. It includes a bearing platform and a wall arranged on the top of the bearing platform. The top of the wall is fixedly connected to the end of the longitudinal connection base plate, and the side of the bearing platform close to the bridge extends beyond the side of the wall close to the bridge by a part for supporting the end of the bridge.

[0007] As a further improvement of the utility model, a certain distance is provided between the two side surfaces of the wall adjacent to the bridge located on the bearing platform for the expansion and contraction of the bridge end.

[0008] As a further improvement of the utility model, a friction plate is provided between the longitudinally connected base plate and the bridge located on the bearing platform.

[0009] As a further improvement of the utility model, a sliding layer is provided between the longitudinally connected base plate and the bridge located on the bearing platform, and the sliding layer is located on the side of the friction plate away from the bearing platform.

[0010] As a further improvement of the utility model, the top of the anchoring part at the end of the wall body and the longitudinally connected base plate is flush with the embankment.

[0011] As a further improvement of the utility model, the side of the bearing platform facing away from the bridge extends beyond the side of the wall body facing away from the bridge by a certain part.

[0012] As a further improvement of the utility model, a bridge bearing is provided on the top of the bearing platform on the side of the wall body close to the bridge, for supporting the end of the bridge.

[0013] As a further improvement of the utility model, the bridge bearing is connected to the bearing platform through a bearing padstone.

[0014] As a further improvement of the utility model, at least one pile is provided at the bottom of the bearing platform.

[0015] As a further improvement of the utility model, multiple piles are provided, and the piles are arranged in a rectangular array at the bottom of the bearing platform.

[0016] As long as the above-mentioned improved technical features do not conflict with each other, they can be combined with each other.

[0017] Generally speaking, compared with the prior art, the beneficial effects of the above technical solutions conceived by the utility model include:

[0018] (1) The longitudinally connected base plate anchoring structure combining the abutment and the end spike of the utility model, which includes a bearing platform and a wall body provided on the top of the bearing platform. On the one hand, the wall body is fixedly connected to the end of the longitudinally connected base plate, and the bearing platform and the wall body can form an end spike structure to transfer the longitudinal force of the longitudinally connected base plate to the subgrade, ensuring that the longitudinal displacement of the longitudinally connected base plate under the action of temperature and load meets the stability requirements for the normal use of the track structure; on the other hand, the bearing platform and the wall body can also form an abutment structure, and the side of the bearing platform close to the bridge extends beyond the side of the wall body close to the bridge by a certain part, for supporting the end of the bridge beam. By combining the abutment and the end spike into an integral whole, one structure can realize supporting the end of the bridge beam and anchoring the longitudinally connected base plate, reducing the engineering quantity of the rail transit bridge project and saving the cost.

[0019] (2) The longitudinal connection base plate anchoring structure combining the abutment and the end spike of the present utility model is provided with a friction plate between the longitudinal connection base plate and the bridge located on the bearing platform, so as to buffer the longitudinal force transmitted by the longitudinal connection base plate to the anchoring part between the longitudinal connection base plate and the wall, and avoid damage caused by excessive impact at the end.

[0020] (3) The longitudinal connection base plate anchoring structure combining the abutment and the end spike of the present utility model makes the top of the anchoring part between the wall and the end of the longitudinal connection base plate flush with the embankment, so as to ensure the smooth connection between the bridge and the embankment and keep the rail transit line smooth.

[0021] (4) The longitudinal connection base plate anchoring structure combining the abutment and the end spike of the present utility model is provided with a bridge bearing and a bearing pad stone on the top of the bearing platform on the side of the wall close to the bridge, which can reliably and smoothly transfer the concentrated stress and deformation at the end of the bridge to the bearing platform, and can also adjust the construction error or deviation between the bridge and the bearing platform.

[0022] (5) The longitudinal connection base plate anchoring structure combining the abutment and the end spike of the present utility model combines the abutment and the end spike into one by anchoring the wall and the longitudinal beam base plate and supporting the bridge with the bearing platform, realizing the support of the bridge beam end and the anchoring of the longitudinal connection base plate at the same time, reducing the engineering quantity of the two structures to one structure, reducing the engineering quantity of the rail transit bridge project and saving the cost. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic diagram of the overall structure of the end spike anchoring the longitudinal connection base plate in the prior art;

[0025] Figure 2 It is a schematic diagram of the structure of the longitudinal connection base plate anchoring structure combining the abutment and the end spike in some embodiments of the present utility model;

[0026] Figure 3 It is a schematic diagram of the structure of the longitudinal connection base plate anchoring structure combining the abutment and the end spike in other embodiments of the present utility model.

[0027] In all the drawings, the same reference numerals represent the same technical features, specifically: 1, bearing platform; 2, wall; 3, longitudinal connection base plate; 4, bridge; 5, friction plate; 6, sliding layer; 7, embankment; 8, bearing pad stone; 9, bridge bearing; 10, pile; 11, end spike; 12, abutment. Detailed Embodiments

[0028] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0030] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0031] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0033] Embodiment:

[0034] The longitudinally connected base plate anchoring structure combining the abutment and the end spike in the preferred embodiment of the present utility model is applicable to the CRTS II type slab ballastless track, and is particularly applicable to the CRTS II type slab ballastless track in the bridge section with mountain valley terrain.

[0035] Please refer to Figures 1 to 3 , the longitudinally connected base plate anchoring structure combining the abutment and the end spike in the preferred embodiment of the present utility model includes a bearing platform 1 and a wall body 2 arranged on the top of the bearing platform 1. Among them, the top of the wall body 2 is anchored and connected to the end of the longitudinally connected base plate 3, and the side of the bearing platform 1 close to the bridge 4 extends beyond the side of the wall body 2 close to the bridge 4 by a part, for supporting the end of the bridge 4. In the present utility model, the longitudinal direction refers to the direction along the axis of the bridge or the track, and the transverse direction refers to the direction perpendicular to the axis of the bridge or the track.

[0036] Specifically, on the one hand, the bearing platform 1 and the wall body 2 can form an end spike structure. The wall body 2 is anchored and connected to the end of the longitudinally connected base plate 3, and transmits the longitudinal force of the longitudinally connected base plate 3 to the bearing platform 1 and the subgrade. The bearing platform 1 further transmits the longitudinal force into the subgrade to ensure that the longitudinal displacement of the longitudinally connected base plate 3 under the action of temperature and load meets the stability requirements for the normal use of the track structure; on the other hand, the bearing platform 1 and the wall body 2 can also form an abutment structure, and the bearing platform 1 is used to support the beam end of the bridge 4. Thus, it can be seen that the combined structure of the bearing platform 1 and the wall body 2 in the present utility model can simultaneously realize supporting the beam end of the bridge and anchoring the longitudinally connected base plate, reduce the engineering quantity of the rail transit bridge project, and save the cost.

[0037] Preferably, the side of the bearing platform 1 facing away from the bridge 4 extends beyond the side of the wall body 2 facing away from the bridge 4 by a part, so that the soil in the embankment covers this part of the structure, improving the anti-overturning force of this component structure. In the present utility model, the combined structure of the bearing platform 1 and the wall body 2 is subjected to both the longitudinal force transmitted by the longitudinally connected base plate 3 in the upper CRTS II type slab ballastless track and all the loads transmitted from the end of the bridge 4, and also directly bears the lateral earth pressure, and the force system is relatively complex. By setting an increased area on the side of the bearing platform 1 facing away from the bridge 4, the strength, stiffness and stability of the overall combined structure can be improved.

[0038] Preferably, the wall 2 is arranged horizontally along the bridge or the track on the top of the bearing platform 1.

[0039] Preferably, the bearing platform 1 and the wall 2 are fixedly connected. Specifically preferably, the bearing platform 1 and the wall 2 can be an integral structure formed by in-situ casting, or one can be precast and the other can be cast in-situ, or both are precast structures and are spliced and installed as a whole.

[0040] In a preferred embodiment, the bearing platform 1 includes both the foundation of the abutment and the body of the abutment, and is in the form of an abutment with the foundation and the body integrated.

[0041] Further, a bridge bearing 9 is preferably arranged on the top of the bearing platform 1 on the side of the wall 2 close to the bridge, for supporting the end of the bridge 4 and reliably transmitting the concentrated stress and deformation at the beam end to the bearing platform 1.

[0042] Preferably, the bridge bearing 9 is connected to the bearing platform 1 through a bearing padstone 8. The bearing padstone 8 can protect the bridge bearing 9, improve the service life of the bridge bearing 9, and can also adjust the construction error or deviation between the bridge 4 and the bearing platform 1. Preferably, the bearing padstone 8 is connected to the bearing platform 1 in a flat and dense manner, and transmits the concentrated stress of the bridge bearing 9 to the bearing platform 1 gently and evenly.

[0043] Preferably, at least one pile 10 is arranged at the bottom of the bearing platform 1, preferably arranged in a section with weak foundation to improve the bearing capacity of the foundation. Preferably, the pile 10 can be a friction pile or an end-bearing pile.

[0044] In actual setting, when the overall bearing capacity of the foundation is insufficient, preferably multiple piles 10 are arranged at the bottom of the bearing platform 1. The multiple piles 10 can be arranged in forms such as symmetrically, in a plum blossom pattern, in a row pattern, etc. For example, the multiple piles 10 are arranged in a rectangular array at the bottom of the bearing platform.

[0045] Further preferably, a certain spacing is provided between the two side surfaces of the wall 2 adjacent to the bridge 4 located on the bearing platform 1 for the expansion and contraction of the end of the bridge 4. The size of the spacing is preferably set according to the expansion and contraction amount of the bridge 4.

[0046] Preferably, a friction plate 5 is arranged between the longitudinally connected base plate 3 and the bridge 4 located on the bearing platform 1. The friction plate 5 can buffer the longitudinal force transmitted by the longitudinally connected base plate 3 to the anchoring part between the longitudinally connected base plate 3 and the wall 2, and is also a part of the anchoring area of the longitudinally connected base plate 3.

[0047] Specifically, when the beam body 4 is a short simply supported beam, a friction plate 5 can be arranged between the entire simply supported beam and the longitudinally connected base plate 3, and the entire beam body 4 is used as a transition section for buffering the longitudinal force; when the span of the beam body 4 is large, a friction plate 5 can be arranged between the tail part of the bridge 4 and the longitudinally connected base plate 3, and a part of the beam body 4 is used as a transition section for buffering the longitudinal force.

[0048] Preferably, a sliding layer 6 is provided between the longitudinally continuous base plate 3 and the bridge 4 located on the bearing platform 1. The sliding layer 6 is located on the side of the friction plate 5 away from the bearing platform 1 and is provided outside the anchorage area of the longitudinally continuous base plate 3 to reduce the friction between the longitudinally continuous base plate 3 and the bridge 4, so that the two can relatively slide more easily outside the anchorage area.

[0049] Preferably, the top of the anchorage part at the end of the wall 2 and the longitudinally continuous base plate 3 is flush with the embankment 7 to ensure the smooth connection between the bridge 4 and the embankment 7 and keep the rail transit line smooth.

[0050] The longitudinally continuous base plate anchorage structure combining the abutment and the end spike in the present utility model comprises a bearing platform 1 and a wall 2 arranged on the top of the bearing platform 1. On the one hand, the wall 2 is fixedly connected to the end of the longitudinally continuous base plate 3, and the bearing platform 1 and the wall 2 can form an end spike structure to transfer the longitudinal force of the longitudinally continuous base plate 3 to the subgrade, ensuring that the longitudinal displacement of the longitudinally continuous base plate 3 under the action of temperature and load meets the stability requirements for the normal use of the track structure. On the other hand, the bearing platform 1 and the wall 2 can also form an abutment structure, wherein the bearing platform 1 is used to support the beam end of the bridge 4. By integrating the abutment and the end spike into a whole, the present utility model realizes the support of the beam end of the bridge 4 and the anchorage of the longitudinally continuous base plate 3 at the same time, reduces the engineering quantity of the two structures to one structure, reduces the engineering quantity of the rail transit bridge project, and saves the cost.

[0051] It is easy for those skilled in the art to understand that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A longitudinal base plate anchoring structure combining abutments and end thorns, suitable for CRTSⅡ type slab ballastless track, characterized in that: It includes a pier and a wall fixedly connected to the top of the pier, the top of the wall is anchored to the end of the longitudinal base plate, the side of the pier close to the bridge extends beyond a part of the side of the wall close to the bridge, and is used to support the end of the bridge. The pier includes both the foundation of the abutment and the body of the abutment, and is a form of abutment in which the foundation and the body are integrated.

2. The longitudinal base plate anchoring structure of the abutment and end thorn combination according to claim 1 is characterized in that: A certain distance is arranged between the wall and two adjacent side surfaces of the bridge on the pedestal, so as to allow the ends of the bridge to be extended and retracted.

3. The longitudinally connected base plate anchoring structure of the abutment and end thorn combination according to claim 2 is characterized in that: A friction plate is arranged between the longitudinal base plate and the bridge located on the bearing platform.

4. The longitudinally connected base plate anchoring structure of the abutment and end thorn combination according to claim 3 is characterized in that: A sliding layer is arranged between the longitudinal base plate and the bridge located on the bearing platform, and the sliding layer is located on the side of the friction plate away from the bearing platform.

5. The longitudinally connected base plate anchoring structure of the abutment and end thorn combination according to any one of claims 1 to 4, characterized in that: The top of the anchoring part of the wall and the end of the longitudinally connected base plate is flush with the embankment.

6. The longitudinally connected base plate anchoring structure of the abutment and end thorn combination according to any one of claims 1 to 4, characterized in that: The side of the cap facing away from the bridge exceeds a portion of the side of the wall facing away from the bridge.

7. The longitudinally connected base plate anchoring structure of the abutment and end thorn combination according to any one of claims 1 to 4, characterized in that: A bridge support is provided on the top of the pedestal on one side of the wall body close to the bridge, for supporting the end of the bridge.

8. The longitudinally connected base plate anchoring structure of the abutment and end thorn combination according to claim 7 is characterized in that: The bridge bearing is connected to the cap through a bearing pad stone.

9. The longitudinally connected base plate anchoring structure of the abutment and end thorn combination according to any one of claims 1 to 4, characterized in that: At least one pile is arranged at the bottom of the foundation.

10. The longitudinally connected base plate anchoring structure of the abutment and end thorn combination according to claim 9, characterized in that: A plurality of piles are provided, and the piles are arranged in a rectangular array at the bottom of the cap.

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