An anti-vibration system for an orbital bridge support column, its anti-vibration structure and construction method

Abstract

The present invention discloses a shock absorption system for a track bridge pillar, its shock absorption structure and construction method. The shock absorption structure includes an embedded part, a shock absorption buffer plate, a steel pad and a shock absorption buffer frame. The shock absorption buffer plate is laid at the center of the top surface of the embedded part, the steel pad is laid on the shock absorption buffer plate and is tightly pressed by a first fastening nut. The shock absorption buffer frame is a hollow rectangular frame structure and is placed on the peripheral side of the top surface of the shock absorption buffer plate. The track bridge pillar is limited by a second fastening nut, and there is a first gap between the top surface of the track bridge pillar and the steel pad, and a second gap is provided between the side surface of the track bridge pillar and the shock absorption buffer frame. The first gap and the second gap are filled with track mortar. In the present invention, the shock absorption buffer plate buffers the vibration in the vertical direction, and the shock absorption buffer frame buffers the vibration in the horizontal direction, improving the shock absorption effect. Moreover, only one shock absorption structure needs to be arranged on the outer periphery of each track bridge pillar, reducing the construction cost.

Description

Technical Field

[0001] The present invention relates to the technical field of shock absorption of subway and urban rail track bridges, and particularly relates to a shock absorption system for track bridge columns, a shock absorption structure thereof, and a construction method thereof. Background Art

[0002] Nowadays, as a major form of transportation, urban subways and urban rails have become the travel choices of more and more people and play an important role in urban public transportation. Therefore, the density of subway and urban rail construction is getting higher and higher.

[0003] However, during the operation of urban subways and urban rails, vibrations will be generated due to the interaction between the wheels and the rails. The vibrations will be transmitted into the soil structure of the subway through various propagation methods, affecting the building structures along the subway and reducing the quality of life of residents.

[0004] For this reason, improving the shock absorption and noise reduction of subway tracks has become an important issue that cannot be ignored in subway track construction. In the prior art, the common method is to lay a rubber floating slab track bed under the track. However, this method is applicable to the situation where the track is directly laid on the ground foundation. For the structural form supported by a track bridge, the solution adopted by the Chinese Utility Model Patent CN201473888U is that the column is installed on the concrete foundation through a foundation embedded part. At the same time, the upper and lower end faces of the column are connected to the column seat plate, the upper column seat plate is connected to the rail iron seat, there is an installation boss at each of the left and right ends in the vertical direction of the rail iron seat, and the elastic strip III type fastener is installed on the boss. The elastic strip of the elastic strip III type fastener clamps both sides of the rail, thereby fixing the rail on the column, and the lower column seat plate of the column is connected to the foundation embedded part. The rail and the column can be insulated and shock-absorbed under the action of the elastic strip III type fastener, thus ensuring the safety of maintenance operations and reducing the vibration of the moving train. However, this solution still has the following problems:

[0005] First, there is no decompression buffer structure between the column and the concrete foundation. The elastic strip III type fastener cannot completely eliminate the vibrations between the rail and the column, and the remaining vibrations will be transmitted into the soil structure of the subway, affecting the building structures along the subway and reducing the quality of life of residents.

[0006] Second, if the rubber floating slab track bed in the prior art is added, it is usually laid over a large area, increasing the construction cost.

[0007] In view of this, it is urgent to improve the existing shock absorption system for track bridge columns, its shock absorption structure, and construction method to improve the shock absorption effect, reduce the construction cost, and improve the operation efficiency. Summary of the Invention

[0008] In view of the above deficiencies, the technical problem to be solved by the present invention is to provide a shock-absorbing system for track bridge piers, its shock-absorbing structure and construction method, so as to solve the problems of poor shock-absorbing effect and high construction cost of the existing shock-absorbing system for track bridge piers.

[0009] To this end, the shock-absorbing structure of the track bridge pier provided by the present invention includes embedded parts embedded in the ground foundation at the installation position of the track bridge pier. The embedded parts have multiple threaded columns protruding upward for fixedly connecting the base of the track bridge pier. It also includes:

[0010] A shock-absorbing buffer plate, the projection of the outer contour of which is located outside the base. The shock-absorbing buffer plate is laid on the center of the top surface of the embedded part through the threaded columns;

[0011] A steel backing plate is laid on the center of the top surface of the shock-absorbing buffer plate through the threaded columns and is tightly pressed on the top surface of the shock-absorbing buffer plate by a first fastening nut;

[0012] A shock-absorbing buffer frame, which is a hollow rectangular frame structure and is placed on the peripheral side of the top surface of the shock-absorbing buffer plate;

[0013] The base of the track bridge pier passes through the threaded columns and is fixed. Among them, the bottom surface of the base is limited by a second fastening nut, and the top surface of the base is fastened by a third fastening nut; there is a first gap between the bottom surface of the base and the top surface of the backing plate, and a second gap is provided between the side surface of the base and the inner wall of the shock-absorbing buffer frame. The first gap and the second gap are filled with track mortar.

[0014] In the above technical solution, preferably, the width of the second gap is adapted to adjust the working distance of the second fastening nut.

[0015] In the above technical solution, preferably, the shock-absorbing buffer frame is surrounded by the first, second, third, and fourth side walls. Among them, two opposite first and third side walls are attached to the side walls of the base, and the gaps between the two opposite second and fourth side walls and the corresponding side walls of the base are the third gap and the fourth gap respectively, and the third gap is greater than the fourth gap.

[0016] In the above technical solution, preferably, the static stiffness K of the shock-absorbing buffer plate static is 25 - 40 kN, and the calculation formula is as follows:

[0017] K static =(F2 - F1) / (D2 - D1);

[0018] In the formula, F2 is the sum of the load under the concrete pier and the bolt tightening load;

[0019] F1 is the bolt tightening load;

[0020] D2 is the displacement of the pillar under the combined action of the load under the concrete pillar and the bolt tightening load;

[0021] D1 is the displacement of the pillar under the bolt tightening load.

[0022] In the above technical solution, preferably, the top surface of the base sinks into the ground foundation by 5 - 10 cm.

[0023] In the above technical solution, preferably, an annular convex rib is provided on the bottom surface of the shock absorption and buffer frame, and an annular groove adapted to the annular convex rib is provided on the top surface of the shock absorption and buffer plate.

[0024] The present invention also provides a construction method for a shock-absorbing track bridge pillar. Using the above shock-absorbing structure, the construction method includes the following steps:

[0025] Dig a reserved hole in the ground foundation of the track bridge pillar and install the embedded part;

[0026] Pass the shock absorption and buffer plate through the threaded column and lay it on the embedded part;

[0027] Pass the steel backing plate through the threaded column and place it on the shock absorption and buffer plate, and fix it with the first fastening nut;

[0028] Install the second fastening nut on the threaded column;

[0029] Install the shock absorption and buffer frame;

[0030] Pass the base of the track bridge pillar through the threaded column, support it on the second fastening nut, and install a third fastening nut at the upper end of the threaded column to fix the track bridge pillar to the embedded part;

[0031] The verticality of the track bridge pillar can be adjusted by lifting the shock absorption and buffer frame to adjust the second fastening nut;

[0032] After the adjustment of the track bridge pillar is completed, lower the shock absorption and buffer frame, and pour and fill the track mortar in the first gap and the second gap.

[0033] The present invention also provides a track bridge pillar shock absorption system, including a track bridge pillar, and the track bridge pillar is installed on the ground foundation through the above shock absorption structure.

[0034] In the above shock absorption system, preferably, two sunken holes are provided on the top surface of the track bridge pillar, a plastic sleeve is installed in the sunken hole, a fastening bolt is installed in the plastic sleeve, and an iron backing plate is fixed on the top surface of the track bridge pillar through the fastening bolt, and the rail is fixed through the elastic clip fastener on the iron backing plate.

[0035] In the above shock absorption system, preferably, a plastic plate is provided between the top surface of the track bridge pillar and the bottom surface of the base plate, and a buffer pad is provided between the rail and the base plate.

[0036] As can be seen from the above technical solutions, the track bridge pillar shock absorption system, its shock absorption structure and construction method provided by the present invention solve the problems of poor shock absorption effect and high construction cost in the prior art. Compared with the prior art, the present invention has the following beneficial effects:

[0037] The shock in the vertical direction is buffered by the shock absorption buffer plate, and the shock in the horizontal direction is buffered by the shock absorption buffer frame, improving the shock absorption effect. Moreover, only one shock absorption structure needs to be provided on the outer periphery of each track bridge pillar, reducing the construction cost. Among them, the shock absorption buffer frame and the shock absorption buffer plate adopt a split structure, which is convenient for construction. Brief Description of the Drawings

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce and explain the drawings required for describing the embodiments of the present invention or the prior art. Obviously, the drawings in the following description are only partial embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0039] Figure 1 Schematic diagram of the track bridge pillar shock absorption system provided by the present invention;

[0040] Figure 2 For Figure 1 the enlarged view of part A in

[0041] Figure 3 Schematic diagram of the shock absorption structure of the track bridge pillar in the present invention;

[0042] Figure 4 For Figure 3 the side view of

[0043] Figure 5 For Figure 3 the enlarged view of part B in

[0044] Figure 6 Top view of the shock absorption structure of the track bridge pillar in the present invention. Detailed Description of the Embodiments

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the embodiments described below are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present invention.

[0046] The implementation principle of the present invention is as follows:

[0047] The vertical vibration is buffered by the shock-absorbing buffer plate, and the horizontal vibration is buffered by the shock-absorbing buffer frame, which improves the shock-absorbing effect. Moreover, only one shock-absorbing structure needs to be provided on the outer periphery of each track bridge pillar, reducing the construction cost. Among them, the shock-absorbing buffer frame and the shock-absorbing buffer plate adopt a split structure, which is convenient for construction.

[0048] In order to make a clearer explanation and illustration of the technical solutions and implementation methods of the present invention, several preferred specific embodiments for implementing the technical solutions of the present invention are introduced below.

[0049] It should be noted that the orientation words such as "inside, outside", "front, back", and "left, right" in this article are expressed based on the product in the use state. Obviously, the use of the corresponding orientation words does not constitute a limitation on the protection scope of this solution.

[0050] Please refer to Figure 1 , Figure 1 a shock-absorbing system for track bridge pillars provided by the present invention.

[0051] As Figure 1 shown, a shock-absorbing system for track bridge pillars provided by the present invention includes a track bridge pillar 10. The track bridge pillar 10 is installed on the ground foundation 30 at the track bridge pillar installation position through a shock-absorbing structure 20. A tie plate 40 is fixedly installed on the top surface of the track bridge pillar 10, and a rail 50 is fixed on the tie plate 40.

[0052] Specifically, as Figure 2 shown, a counterbore 11 is provided on the top surface of the track bridge pillar 10. A plastic sleeve 12 is installed in the counterbore 11, and a fastening bolt 13 is installed in the plastic sleeve 12. The tie plate 40 is fixed on the top surface of the track bridge pillar 10 through the fastening bolt 13, and the rail 50 is fixed by the elastic clip fastener 31 on the tie plate 40. Further, a plastic plate 14 is provided between the top surface of the track bridge pillar 10 and the bottom surface of the tie plate 40, serving as a transition adjustment plate to avoid local strain caused by the uneven top surface of the concrete track bridge pillar 10, and a buffer pad 15 is provided between the rail 50 and the tie plate 40.

[0053] Next, in conjunction with Figure 3 , Figure 4 andFigure 5 Specifically introduce the shock absorption structure of the track bridge support column. Figure 3 It is a schematic diagram of the shock absorption structure of the track bridge support column. Figure 4 It is Figure 3 the side view of Figure 5 It is Figure 3 the enlarged view of part B in

[0054] As Figure 3 , Figure 4 , Figure 5 shown, the shock absorption structure of the track bridge support column includes a pre-embedded part 210, a shock absorption buffer plate 220, a steel backing plate 230, and a shock absorption buffer frame 240.

[0055] The pre-embedded part 210 is pre-embedded in the ground foundation 30 at the installation position of the track bridge support column. The pre-embedded part 210 includes a pre-embedded steel plate 211, which is provided with four through holes. Four threaded columns 212 are inserted through the through holes and welded and fixed to the pre-embedded steel plate. The upper part of the threaded column 212 extends upward for fixedly connecting the base of the track bridge support column, and the lower end of the threaded column 212 is horizontally bent, and the bending direction is opposite to two adjacent threaded columns 212.

[0056] The outer contour projection of the shock absorption buffer plate 220 is located outside the base 16 of the track bridge support column 10, that is, the outer contour of the shock absorption buffer plate 220 is one circle larger than the outer contour of the base 16 of the track bridge support column 10. Usually, each side is at least 20 cm to 40 cm larger. The shock absorption buffer plate 220 is provided with through holes corresponding to the threaded columns 212. The shock absorption buffer plate 220 is laid at the center of the top surface of the pre-embedded steel plate 211, and the threaded column 212 passes upward through the shock absorption buffer plate 220.

[0057] The steel backing plate 230 is used to fix the shock absorption buffer plate 220, and it is also provided with through holes corresponding to the threaded columns 212. The steel backing plate 230 passes through the threaded columns 212 and is laid at the center of the top surface of the shock absorption buffer plate 220, and the steel backing plate 230 is tightly pressed on the top surface of the shock absorption buffer plate 220 by the first fastening nut 213.

[0058] The shock absorption buffer frame 240 is a hollow rectangular frame structure, which is placed on the peripheral side of the top surface of the shock absorption buffer plate 220, and the outer side surface of the shock absorption buffer frame 240 is flush with the outer side surface of the shock absorption buffer plate 220. The bottom surface of the shock absorption buffer frame 240 is provided with an annular convex rib 241, and the top surface of the shock absorption buffer plate 220 is provided with an annular groove adapted to the annular convex rib 261. The cooperation of the annular convex rib 241 and the annular groove realizes the positioning of the shock absorption buffer frame 240 and avoids the shock absorption buffer frame 240 from moving during the pouring of the track grout.

[0059] The base 16 of the track bridge support column 10 passes through the threaded column 212 and is fixed. Among them, the bottom surface of the base 16 is limited by the second fastening nut 214, and the top surface of the base 16 is fastened by the third fastening nut 215. A first gap is left between the bottom surface of the base 16 and the top surface of the steel backing plate 230, and a second gap is provided between the side surface of the base 16 and the inner wall of the shock-absorbing buffer frame 240. The track grout 250 is poured and filled in the first gap and the second gap. The top surface of the base 16 sinks into the ground foundation by 5 - 10 cm.

[0060] As Figure 6 shown, the shock-absorbing buffer frame 240 is surrounded by the first, second, third, and fourth side walls. Among them, two opposite first and third side walls are attached to the side wall of the base 16. For the two opposite second side walls and the fourth side wall, the gaps with the corresponding side walls of the base 16 in the second gap are the third gap 242 and the fourth gap 243 respectively, and the third gap 242 is larger than the fourth gap 243.

[0061] The shock-absorbing buffer plate 220 mainly bears the loads transmitted from the train, the rail, and the track bridge support column, as well as the pressing load of the third fastening nut (the bolt tightening load of the concrete track bridge support column). When selecting the static stiffness of the shock-absorbing buffer plate, the above-mentioned loads and the displacement of the track bridge support column under the above-mentioned loads should be considered. The static stiffness K static is 25 - 40 kN, and the calculation formula is as follows:

[0062] K static =(F2 - F1) / (D2 - D1);

[0063] In the formula: F2 is the sum of the load under the concrete track bridge support column and the bolt tightening load;

[0064] F1 is the bolt tightening load;

[0065] D2 is the displacement of the track bridge support column under the combined action of the load under the concrete track bridge support column and the bolt tightening load;

[0066] D1 is the displacement of the track bridge support column under the action of the bolt tightening load of the concrete track bridge support column.

[0067] The present invention also provides a construction method for a shock-absorbing track bridge support column adopting the above shock-absorbing structure. The construction method includes the following steps:

[0068] Step 110, excavate a reserved hole on the ground foundation 30 of the track bridge support column, and install a pre-embedded part 210 in the reserved hole for installing the track bridge support column 10.

[0069] Step 120, lay the shock-absorbing buffer plate 220 through the threaded column 212 on the top surface of the embedded steel plate 211 of the pre-embedded part 210.

[0070] Step 130: Place the steel backing plate 230 through the threaded post 212 on the shock-absorbing buffer plate 220 and fix it with the first fastening nut 213.

[0071] Step 140: Install the second fastening nut 214 on the threaded post 212.

[0072] Step 150: Place the shock-absorbing buffer frame 240.

[0073] Step 160: Connect and fix the base 16 of the track bridge support column 10 to the embedded part 210 through the threaded post 212. The base 16 is supported on the second fastening nut 214, and install the third fastening nut 215 at the upper end of the threaded post 212 to fix the track bridge support column 10 to the embedded part 210.

[0074] After the track bridge support column 10 is installed on the embedded part 210, it is usually necessary to adjust the verticality of the track bridge support column 10. In the present invention, the shock-absorbing buffer plate 220 and the shock-absorbing buffer frame 240 adopt a split structure. The second fastening nuts 214 can be adjusted by lifting the shock-absorbing buffer frame 240. After the adjustment of the track bridge support column 10 is completed, the shock-absorbing buffer frame 240 is lowered.

[0075] Therefore, the width of the second gap should be adapted to the working distance for adjusting the second fastening nut 214. The width of the second gap can be set to 20 cm to 40 cm, so that after lifting the shock-absorbing buffer frame 240, it is convenient to rotate the second fastening nut 214 with tools such as a wrench.

[0076] Step 160: Pour and fill the track grout 250 from one end of the second gap to make the track grout 250 fill the first gap and the second gap.

[0077] Among them, when pouring and filling the track grout, pour it from one end of the third gap 242, and the track grout emerges from the fourth gap 243. When it emerges 1 - 2 cm in height, stop pouring the track grout. This way of pouring from the end with a larger gap to the end with a smaller gap can ensure good fluidity during the pouring process of the track grout, and the track grout is more dense after pouring, ensuring strength.

[0078] Based on the description of the above specific embodiments, a track bridge support column shock-absorbing system, its shock-absorbing structure and construction method provided by the present invention have the following advantages compared with the prior art:

[0079] First, the shock in the vertical direction is buffered by the shock-absorbing buffer plate, and the shock in the horizontal direction is buffered by the shock-absorbing buffer frame, improving the shock-absorbing effect. And only one shock-absorbing structure needs to be set on the outer periphery of each track bridge support column, reducing the construction cost.

[0080] Secondly, the shock-absorbing buffer frame and the shock-absorbing buffer plate adopt a split structure, which is convenient for construction.

[0081] Thirdly, a second fastening nut is installed on the threaded column, and the base of the track bridge support column is supported on the second fastening nut. There is a gap between the second fastening nut and the first fastening nut, so that the verticality of the track bridge support column can be adjusted by adjusting the second fastening nut, thereby ensuring the construction quality.

[0082] Finally, it should also be noted that the term "including", "comprising" or any other variant thereof used in this text is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the presence of additional identical elements in the process, method, article or device including the said element.

[0083] The present invention is not limited to the above-mentioned best implementation mode. Anyone should know that structural changes made under the inspiration of the present invention, as long as they have the same or similar technical solutions as the present invention, all fall within the protection scope of the present invention.

Claims

1. A shock-absorbing structure for an orbital bridge pillar, comprising embedded parts, embedded in the ground foundation at the installation position of the orbital bridge pillar. The embedded parts have multiple threaded columns protruding upward for fixedly connecting the base of the orbital bridge pillar. It is characterized in that, Further comprising: A shock-absorbing buffer plate, the projection of the outer contour of which is located outside the base, and the shock-absorbing buffer plate is laid through the threaded column at the center of the top surface of the embedded part; A steel backing plate, which is laid through the threaded column at the center of the top surface of the shock-absorbing buffer plate, and is pressed tightly on the top surface of the shock-absorbing buffer plate by a first fastening nut; A shock-absorbing buffer frame, which is of a hollow rectangular frame structure and is placed on the peripheral side of the top surface of the shock-absorbing buffer plate; The base of the track bridge column passes through the threaded column and is fixed. Among them, the bottom surface of the base is limited by a second fastening nut, and the top surface of the base is fastened by a third fastening nut; there is a first gap between the bottom surface of the base and the top surface of the backing plate, and a second gap is provided between the side surface of the base and the inner wall of the shock-absorbing buffer frame. The first gap and the second gap are filled with filling track mortar; The shock-absorbing buffer frame is surrounded by the first, second, third, and fourth side walls. Among them, two opposite first and third side walls are attached to the side walls of the base, and the gaps between the two opposite second and fourth side walls and the corresponding side walls of the base are the third gap and the fourth gap respectively, and the third gap is larger than the fourth gap; An annular convex rib is provided on the bottom surface of the shock-absorbing buffer frame, and an annular groove adapted to the annular convex rib is provided on the top surface of the shock-absorbing buffer plate.

2. The shock-absorbing structure for an orbital bridge pillar according to claim 1, characterized in that, The width of the second gap is adapted to adjust the working distance of the second fastening nut.

3. The shock-absorbing structure for an orbital bridge pillar according to claim 1, characterized in that, The static stiffness K of the shock-absorbing buffer plate static is 25 - 40 kN, and the calculation formula is as follows: K static = (F2 - F1) / (D2 - D1); In the formula, F2 is the sum of the load under the concrete column and the bolt tightening load; F1 is the bolt tightening load; D2 is the displacement of the column under the combined action of the load under the concrete column and the bolt tightening load; D1 is the displacement of the column under the action of the bolt tightening load.

4. The shock-absorbing structure for an orbital bridge pillar according to claim 1, characterized in that, The top surface of the base sinks into the ground foundation by 5 - 10 cm.

5. A construction method for a shock-absorbing orbital bridge pillar, characterized in that, Adopting the shock-absorbing structure as described in any one of claims 1 to 4, the construction method includes the following steps: Excavate a reserved hole on the ground foundation of the track bridge column and install the embedded part; Lay the shock-absorbing buffer plate through the threaded column on the embedded part; Place the steel backing plate through the threaded column on the shock-absorbing buffer plate and fix it with a first fastening nut; install the second fastening nut on the threaded column; install the shock-absorbing buffer frame; Pass the base of the track bridge column through the threaded column, support it on the second fastening nut, and install a third fastening nut at the upper end of the threaded column to fix the track bridge column to the embedded part; Adjust the second fastening nut by lifting the shock-absorbing buffer frame to adjust the verticality of the track bridge column; After the adjustment of the track bridge column is completed, lower the shock-absorbing buffer frame, and fill the first gap and the second gap with the filling track mortar.

6. An orbital bridge pillar shock-absorbing system, comprising an orbital bridge pillar, characterized in that, The track bridge column is installed on the ground foundation through the shock-absorbing structure as described in any one of claims 1 to 4.

7. The orbital bridge pillar shock-absorbing system according to claim 6, characterized in that, Two counterbores are provided on the top surface of the track bridge column. Plastic sleeves are pre-installed in the counterbores. Fastening bolts are installed in the plastic sleeves. The iron backing plate is fixed on the top surface of the track bridge column by the fastening bolts, and the rail is fixed by the elastic clip fasteners on the iron backing plate.

8. The orbital bridge pillar shock-absorbing system according to claim 7, characterized in that, A plastic plate is provided between the top surface of the track bridge support column and the bottom surface of the baseplate, and a buffer pad is provided between the rail and the baseplate.

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