A removable support structure suitable for assembled rails of urban rail transit

Abstract

The present invention relates to the field of rail transit technology, and discloses a removable support structure suitable for assembled tracks of urban rail transit, wherein the support structure is a wedge-shaped support block, and the wedge-shaped support block is arranged between a prefabricated track plate and an arc-shaped shield segment, and the prefabricated track plate is composited with a vibration-damping pad layer, and the vibration-damping pad layer is located under the prefabricated track plate; two prefabricated plate reserved guide grooves that engage with the wedge-shaped support block are arranged on both sides of the prefabricated track plate, and before the filling layer is formed, the wedge-shaped support block is used to support the prefabricated track plate, and after the filling layer is formed, the wedge-shaped support block is unloaded internally, and the support of the wedge-shaped support block to the prefabricated track plate is cancelled, so as to achieve close contact between the vibration-damping pad layer and the filling layer. The present invention can quickly support and cancel the support of the prefabricated track plate by changing the internal structure of the support structure under the prefabricated track plate, and also ensures the vibration reduction effect of the assembled track of rail transit.

Description

Technical Field

[0001] The invention relates to the technical field of rail transit, and in particular to a dismountable supporting structure suitable for an assembled track of urban rail transit. Background Art

[0002] With the development of urban rail transit and the continuous improvement of people's living standards, the vibration and noise problems of urban rail transit have attracted more and more attention. At present, the main measure for reducing vibration and noise in urban rail transit is track structure vibration reduction. Among the track vibration reduction measures, the track structure of the ballast bed vibration reduction has a large vibration mass and better vibration reduction effect, so it is widely used. The vibration reduction pad ballast bed is a type of ballast bed type vibration reduction track.

[0003] The existing types of vibration-damping pad track mainly include cast-in-place reinforced concrete track bed, three-layer prefabricated track bed and two-layer prefabricated track bed structure. At present, the construction process uses on-site cast vibration-damping pad reinforced concrete track bed. Due to the large amount of on-site steel bar binding and concrete pouring, and the laying of vibration-damping pads must be completed on-site, the construction speed is slow, the work efficiency is low, the construction cost is high, and the construction quality is not easy to guarantee. The existing technology casting has reduced the work efficiency. In order to realize the prefabricated assembled vibration-damping pad reinforced concrete track bed in the existing technology, the support structure is used to quickly support the track plate, which is conducive to reducing the amount of on-site concrete pouring and increasing the assembly rate of the prefabricated plate; the track bottom of the vibration-damping pad is often arc-shaped, and the support structure is often supported in the form of support points. First, the support point mode cannot achieve stable support. Secondly, it may cause damage to the track bottom of the vibration-damping pad. Finally, the support structure must be dismantled to ensure the vibration reduction effect of the entire track structure. The installation and dismantling of the support structure under the supporting track plate increases the workload and further reduces the efficiency. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a removable support structure suitable for prefabricated tracks of urban rail transit. The support structure of the present invention not only does not need to be removed from under the prefabricated track plate, thereby reducing the workload, but also can quickly support and cancel the support of the prefabricated track plate by changing the internal structure of the support structure under the prefabricated track plate, and also ensures the vibration reduction effect of the prefabricated track of rail transit.

[0005] The present invention provides a removable support structure suitable for an assembled track of urban rail transit, wherein the support structure is a wedge-shaped support block, wherein the wedge-shaped support block is arranged between a prefabricated track plate and an arc-shaped shield segment, wherein the prefabricated track plate is composited with a vibration-damping pad layer, and the vibration-damping pad layer is located under the prefabricated track plate;

[0006] Both sides of the prefabricated track plate are provided with two prefabricated plate reserved guide grooves which are engaged with the wedge-shaped support blocks. Before the filling layer is formed, the wedge-shaped support blocks are used to support the prefabricated track plate. After the filling layer is formed, the wedge-shaped support blocks are unloaded internally, canceling the support of the wedge-shaped support blocks for the prefabricated track plate, thereby achieving contact between the vibration-damping pad layer and the filling layer.

[0007] Furthermore, before forming the filling layer, the wedge-shaped support block is used to support the prefabricated track slab, specifically including:

[0008] The wedge-shaped support block includes a support cap, a steel rod, and a bolt;

[0009] The steel rod is composed of an upper steel rod and a lower steel rod;

[0010] The support cap is movably connected to the upper steel rod;

[0011] The lower steel rod is fixed to the bottom of the wedge-shaped support block;

[0012] A thread matching the shape of the bolt is provided at one end of the upper steel rod away from the support cap and at one end of the lower steel rod away from the bottom of the wedge-shaped support block;

[0013] When the bolt is located between the upper steel rod and the lower steel rod, the distance between the upper steel rod and the lower steel rod is greater than 0, so that the support cap in the wedge-shaped support block supports the prefabricated track slab.

[0014] Furthermore, after the filling layer is formed, the wedge-shaped support block is unloaded internally, and the specific steps of canceling the support of the prefabricated track slab by the wedge-shaped support block include:

[0015] The wedge-shaped support block also includes a support cap groove, which is arranged at one end in contact with the reserved guide groove of the prefabricated plate. When the bolt is removed from between the upper steel rod and the lower steel rod, and the distance between the upper steel rod and the lower steel rod is equal to 0, the support cap in the wedge-shaped support block is located in the support cap groove, and the support cap cancels the support for the prefabricated track plate.

[0016] Furthermore, the movable connection between the support cap and the upper steel rod specifically includes: reserved pin installation holes are provided at one end of the support cap and one end of the upper steel rod adjacent to the support cap, and the pin is fixed in the reserved pin installation hole, so that the support cap can move freely forward and backward around the upper steel rod in the direction of advancement of the wedge-shaped support block.

[0017] Furthermore, two prefabricated plate reserved guide grooves which engage with the wedge-shaped support blocks are provided on both sides of the prefabricated track plate, specifically including: two prefabricated plate reserved guide grooves on the same side of the prefabricated track plate, which are arranged opposite to each other on the prefabricated track plate.

[0018] Furthermore, the wedge-shaped support block is a wedge-shaped block, and the thickness of the wedge-shaped support block decreases along the insertion direction of the wedge-shaped support block.

[0019] Furthermore, the wedge-shaped support block also includes a bolt hole fixture, a steel rod fixing fixture, and a fixing block.

[0020] The lower section of the steel rod is fixed on the fixing block, and the fixing block is also fixedly connected with the steel rod fixing fixture and the bolt hole fixture to form the main body of the wedge-shaped supporting block.

[0021] Furthermore, the wedge-shaped support block also includes an unloading reserved tube, which is arranged in the bolt hole tooling to realize the screwing in and screwing out operations of the bolt.

[0022] Furthermore, the bolt is conical.

[0023] The embodiments of the present invention have the following technical effects:

[0024] 1. The present invention first designs a removable support structure suitable for assembled tracks of urban rail transit. The structure of the present invention can avoid the support structure from being removed from under the prefabricated track plate, thereby facilitating the improvement of construction efficiency;

[0025] Firstly, in order to improve the efficiency of construction, a wedge-shaped support block is designed. By designing the internal structure of the wedge-shaped support block, the support cap in the wedge-shaped support block can realize the supporting function. The entire surface of the support cap is used to support the prefabricated track plate, avoiding point support or line support with the prefabricated track plate, and preventing the point support or line support as the support of the prefabricated track plate, which may cause the support structure to be unstable, and may even cause damage to the prefabricated track plate; secondly, the support cap is flexibly connected in the entire wedge-shaped support block, and the support cap can move freely forward and backward around the upper steel rod in the direction of the wedge-shaped support block, which is beneficial for the support cap to fully contact with the reserved guide groove of the prefabricated plate, thereby facilitating support; finally, the wedge-shaped support block does not need to be removed from the reserved guide groove of the prefabricated plate, and the support cap completely falls back into the groove of the support cap, which can achieve complete contact between the vibration-damping cushion layer and the filling layer, thereby ensuring the vibration-damping effect of the entire structure of the present invention.

[0026] 2. The present invention is applicable to the support structure of the prefabricated track of urban rail transit. The concrete support structure can quickly realize the support and unloading functions of the upper track plate, and can form a stable structural force system. The roadbed structure has a simple composition, a high assembly rate, and a simple construction process. It can not only meet the needs of rapid support of ordinary roadbeds, but also realize the relevant functions of prefabricated vibration-damping roadbeds.

[0027] 3. The present invention is applicable to the supporting structure of the prefabricated track of urban rail transit. The bolt hole tooling and the steel rod fixing tooling are integrally cast and formed with the concrete support block, which not only ensures the integrity and stability of the embedded tooling, but also reserves conditions for the subsequent precise installation of steel rods, support caps and bolts.

[0028] 4. The present invention is applicable to the support structure of the assembled track of urban rail transit. The corresponding support cap groove is reserved in advance in the concrete support block, which satisfies the working space of the support cap and the operating space of the bolt, ensuring the realization of the support and unloading functions.

[0029] 5. The present invention is applicable to the support structure of the assembled track of urban rail transit. The steel rod is composed of upper and lower sections. During the operation of the support block, a conical bolt is inserted between the two steel rods. During the unloading process, the bolt is screwed out of the two sections of the steel rod, and the upper section of the steel rod and the support cap can slide freely, and the support cap can completely fall into the reserved groove at the top of the support block and be completely separated from the track plate, realizing the unloading function of the concrete support and unloading combined structure.

[0030] 6. The present invention is applicable to the supporting structure of the assembled track of urban rail transit. The bolts are designed to be conical, and threads matching the bolts are reserved in the steel rods to ensure that the supporting caps can be smoothly screwed out of the steel rods under the vertical load of the track plates, thus avoiding thread slippage and jamming of the bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a schematic structural diagram of a wedge-shaped support block provided in an embodiment of the present invention.

[0033] Figure 2 It is a structural diagram of a track structure provided by an embodiment of the present invention.

[0034] Figure 3 It is a connection relationship diagram between the upper steel rod and the support cap provided in an embodiment of the present invention.

[0035] Figure 4 It is a connection diagram of the relationship between the upper steel rod and the lower steel rod provided in an embodiment of the present invention.

[0036] Figure 5 This is a bolt morphology diagram provided by an embodiment of the present invention.

[0037] Reference numerals:

[0038] 1-prefabricated track plate; 2-vibration damping pad; 3-wedge-shaped support block; 4-pouring layer; 5-arc shield segment; 31-support cap; 32-steel rod; 33-bolt hole tooling; 34-bolt; 35-steel rod fixing tooling; 36-unloading reserved pipe; 37-fixing block; 38-support cap groove; 39-reserved pin installation hole; 321-upper section steel rod; 322-lower section steel rod. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0040] exist Figure 2 In some embodiments of the present invention, a removable support structure suitable for assembled tracks of urban rail transit is provided. A support structure is provided between the prefabricated track plate 1 and the arc-shaped shield segment 5. The support structure is a wedge-shaped support block 3. Two prefabricated plate reserved guide grooves that engage with the wedge-shaped support block 3 are provided on both sides of the prefabricated track plate 1. Before the filling layer 4 is formed, the wedge-shaped support block 3 is used to support the prefabricated track plate 1. After the filling layer 4 is formed, the wedge-shaped support block 3 is unloaded inside, and the support of the wedge-shaped support block 3 to the prefabricated track plate 1 is cancelled, so as to achieve the contact between the vibration-damping pad layer 2 and the filling layer 4. Among them, the prefabricated track plate 1 and the vibration-damping pad layer 2 are composited into one body, and the vibration-damping pad layer 2 is located under the prefabricated track plate 1. In the structure of the present invention, through the effect of the wedge-shaped support block 3, during the construction process, it is not necessary to remove the wedge-shaped support block 3 from under the prefabricated track plate 1, so that the close and full contact between the vibration-damping pad layer and the filling layer can be achieved, which not only improves the work efficiency, but also ensures the vibration reduction effect of the entire structure. In addition, the wedge-shaped support block can quickly form a stable structural force system with the prefabricated track slab during the process of supporting or unloading the load of the prefabricated track slab through changes in its internal structure, thereby ensuring the stability of the entire process.

[0041] exist Figure 1 and Figure 4In the embodiment, before the filling layer 4 is formed, the wedge-shaped support block 3 is used to support the prefabricated track plate 1, which specifically includes: the wedge-shaped support block 3 includes a support cap 31, a steel rod 32, and a bolt 34; the steel rod 32 is composed of an upper steel rod 321 and a lower steel rod 322; the support cap 31 is movably connected to the upper steel rod 321; the lower steel rod 322 is fixed to the bottom of the wedge-shaped support block 3; a thread that can match the shape of the bolt 34 is provided at one end of the upper steel rod 321 away from the support cap 31 and at one end of the lower steel rod 322 away from the bottom of the wedge-shaped support block 3; when the bolt 34 is located between the upper steel rod 321 and the lower steel rod 322, the distance between the upper steel rod 321 and the lower steel rod 322 is greater than 0, so that the support cap 31 in the wedge-shaped support block 3 is used to support the prefabricated track plate 1. During the whole process, the support cap is used to support the prefabricated track plate, so that the support cap and the prefabricated track plate form a close surface-to-surface contact, avoiding the formation of point support or line support between the prefabricated track plate, and preventing the situation that the support structure may be unstable when point support or line support occurs, and may also cause damage to the prefabricated track plate. In the present invention, the wedge-shaped support block 3 is a wedge-shaped block, and the thickness of the wedge-shaped support block 3 decreases along the insertion direction of the wedge-shaped support block 3. The shape of the wedge-shaped support block is also set to further promote the adaptation of the wedge-shaped support block 3 to the bottom of the arc-shaped prefabricated track plate.

[0042] In order to further improve the stability of the support, not only is the lower steel rod 322 fixed to the bottom of the wedge-shaped support block 3, but also threads that match the shape of the bolt 34 are provided at one end of the upper steel rod 321 away from the support cap 31 and at one end of the lower steel rod 322 away from the bottom of the wedge-shaped support block 3, so as to avoid displacement of the bolt during the support process and cause instability of the support structure. When the wedge-shaped support block is internally unloaded, it is achieved through the support cap groove 38. The support cap groove 38 is set at the end that contacts the reserved guide groove of the prefabricated plate. When the bolt 34 is moved out from between the upper steel rod 321 and the lower steel rod 322, the distance between the upper steel rod 321 and the lower steel rod 322 is equal to 0, and the support cap 31 in the wedge-shaped support block 3 is located in the support cap groove 38, and the support cap 31 cancels the support for the prefabricated track plate 1. After the filling layer 4 is formed, the bolts are removed, and the support cap 31 in the wedge-shaped support block 3 falls back into the support cap groove 38, and the support cap 31 cancels the support for the vibration-damping pad layer 2 and the prefabricated track plate 1. When the support cap completely falls back into the support cap groove, the vibration-damping pad layer and the filling layer are in full contact, thereby ensuring the vibration reduction effect of the structure of the present invention. In the present invention, the shape of the support cap groove is not limited to a rectangle, as long as the shape of the support cap groove can achieve the complete return of the support cap and the flexible movement of the support cap; when the support cap groove is a rectangle, the width of the support cap groove satisfies the maximum angle of free rotation of the support cap in the support cap groove to adapt to the position of the track plate, and the depth of the support cap groove satisfies the storage space of the support cap in the support cap groove after the support cap is effectively unloaded.

[0043] Figure 3 In the embodiment, the support cap 31 and the upper steel bar 321 are movably connected, specifically including: a reserved through-pin installation hole 39 is provided at one end of the support cap 31 and at one end of the upper steel bar 321 adjacent to the support cap 31, the pin is fixed in the reserved through-pin installation hole 39, and the support cap 31 can freely move forward and backward around the upper steel bar 321 in the direction of the wedge-shaped support block 3. The support cap is flexibly connected in the entire wedge-shaped support block, and the flexible movement of the support cap is conducive to the full contact between the support cap and the prefabricated track plate, thereby facilitating the support.

[0044] Figure 1-Figure 2 In the figure, the wedge-shaped support block 3 is a wedge-shaped block, and the thickness of the wedge-shaped support block 3 decreases along the insertion direction of the wedge-shaped support block 3. In addition, two prefabricated plate reserved guide grooves that engage with the wedge-shaped support block 3 are provided on both sides of the prefabricated track plate 1: the two prefabricated plate reserved guide grooves on the same side of the prefabricated track plate 1 are arranged opposite to each other on the prefabricated track plate 1. All of the above are arranged to achieve stable support of the prefabricated track plate by the wedge-shaped support block. The shape of the wedge-shaped support block is also set to further promote the adaptation of the wedge-shaped support block to the bottom of the prefabricated track plate, and the four wedge-shaped support blocks are conducive to achieving stability in supporting the prefabricated track plate.

[0045] Figure 1 In the embodiment, the wedge-shaped support block 3 further includes a bolt hole fixture 33, a steel bar fixing fixture 35, and a fixing block 37. The lower section of the steel bar 322 is fixed on the fixing block 37. The fixing block 37 is also fixedly connected with the steel bar fixing fixture 35 and the bolt hole fixture 33 to form the main body of the wedge-shaped support block 3. In the present invention, as an example, the fixing block can be made of an arc-shaped steel plate, and the arc surface matches the arc surface of the arc-shaped shield segment, which ensures the close fit between the bottom of the wedge-shaped support block and the arc-shaped shield segment and the wedge-shaped support block can rotate freely along the arc-shaped shield segment to adapt to the on-site working conditions.

[0046] Figure 1 In the embodiment, the wedge-shaped support block 3 further includes an unloading reserved pipe 36, which is arranged in the bolt hole fixture 33 and is used to realize the screwing-in and screwing-out operation functions of the bolt 34. In addition, the unloading reserved pipe can also prevent the concrete from clogging the bolt hole when the filling layer is formed, making it impossible to screw the bolt in and out. As an example, a PVC pipe can be used as the unloading reserved pipe.

[0047] Figure 5 In the figure, the bolt 34 is conical. The bolt is designed to be conical, and the bolt thread matches the thread of the steel rod it contacts, ensuring that the bolt can be smoothly screwed out from the steel rod under the vertical load of the track plate, avoiding the occurrence of thread slippage and bolt jamming during the screwing out process.

[0048] It should be noted that the terms used in the present invention are only for describing specific embodiments, rather than limiting the scope of the present application. As shown in the present specification, unless the context clearly indicates an exception, the words "one", "a", "a kind of" and / or "the" do not specifically refer to the singular, but may also include the plural. The terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method or device. In the absence of more restrictions, the elements defined by the sentence "include one..." do not exclude the presence of other identical elements in the process, method or device including the elements.

[0049] It should also be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention.

Claims

1. A removable support structure suitable for assembled rails of urban rail transit, characterized in that: The supporting structure is a wedge-shaped supporting block (3), the wedge-shaped supporting block (3) is arranged between the prefabricated track plate (1) and the arc-shaped shield segment (5), the prefabricated track plate (1) and the vibration-damping pad (2) are composited into one body, and the vibration-damping pad (2) is located under the prefabricated track plate (1); The two sides of the prefabricated track plate (1) are provided with two prefabricated plate reserved guide grooves which are engaged with the wedge-shaped support blocks (3). Before the filling layer (4) is formed, the wedge-shaped support blocks (3) are used to support the prefabricated track plate (1). After the filling layer (4) is formed, the wedge-shaped support blocks (3) are unloaded internally, and the support of the wedge-shaped support blocks (3) to the prefabricated track plate (1) is cancelled, so that the contact between the vibration-damping cushion layer (2) and the filling layer (4) is achieved; Before forming the filling layer (4), the wedge-shaped support block (3) is used to support the prefabricated track slab (1) and specifically comprises: The wedge-shaped support block (3) comprises a support cap (31), a steel rod (32), and a bolt (34); The steel rod (32) is composed of an upper steel rod (321) and a lower steel rod (322); The support cap (31) is movably connected to the upper steel rod (321); The lower steel rod (322) is fixed to the bottom of the wedge-shaped support block (3); A thread matching the shape of the bolt (34) is provided at one end of the upper steel rod (321) away from the support cap (31) and at one end of the lower steel rod (322) away from the bottom of the wedge-shaped support block (3); When the bolt (34) is located between the upper steel bar (321) and the lower steel bar (322), the distance between the upper steel bar (321) and the lower steel bar (322) is greater than 0, so that the support cap (31) in the wedge-shaped support block (3) is used to support the prefabricated track plate (1); After the filling layer (4) is formed, the wedge-shaped support block (3) is unloaded internally, and the support of the wedge-shaped support block (3) on the prefabricated track plate (1) is cancelled, which specifically includes: The wedge-shaped support block (3) further comprises a support cap groove (38), the support cap groove (38) being arranged at one end in contact with the reserved guide groove of the prefabricated plate, and when the bolt (34) is moved out from between the upper steel bar (321) and the lower steel bar (322), when the distance between the upper steel bar (321) and the lower steel bar (322) is equal to 0, the support cap (31) in the wedge-shaped support block (3) is located in the support cap groove (38), and the support cap (31) cancels the support for the prefabricated track plate (1); The wedge-shaped support block (3) further comprises a bolt hole fixture (33), a steel rod fixing fixture (35), and a fixing block (37). The lower section of the steel bar (322) is fixed on the fixing block (37), and the fixing block (37) is also fixedly connected with the steel bar fixing fixture (35) and the bolt hole fixture (33) to form the main body of the wedge-shaped support block (3); The wedge-shaped support block (3) further comprises an unloading reserved tube (36), wherein the unloading reserved tube (36) is arranged in the bolt hole tooling (33) and is used to reserve space for screwing in and screwing out the bolt (34).

2. The support structure according to claim 1, characterized in that: The support cap (31) and the upper steel rod (321) are movably connected, specifically comprising: a reserved through-pin installation hole (39) is provided at one end of the support cap (31) and at one end of the upper steel rod (321) adjacent to the support cap (31); a latch is fixed in the reserved through-pin installation hole (39); and the support cap (31) can freely move forward and backward around the upper steel rod (321) in the direction of advancement of the wedge-shaped support block (3).

3. The support structure according to claim 1, characterized in that: The wedge-shaped support block (3) is a wedge-shaped block, and the thickness of the wedge-shaped support block (3) decreases along the insertion direction of the wedge-shaped support block (3).

4. The support structure according to claim 1, characterized in that: The two sides of the prefabricated track plate (1) are each provided with two prefabricated track plate reserved guide grooves which engage with the wedge-shaped support blocks (3) and specifically include: two prefabricated track plate reserved guide grooves on the same side of the prefabricated track plate (1) which are arranged opposite to each other on the prefabricated track plate (1).

5. The support structure according to claim 1, characterized in that: The bolt (34) is conical.

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