A concrete track bridge support system and its adjustment method for coping with ground settlement

Abstract

The present invention discloses a concrete track bridge pillar system and an adjustment method for coping with ground settlement. The system includes a concrete foundation, a concrete pillar, embedded parts, and a tray device. The embedded parts include a bottom plate having a plurality of stud bolts vertically penetrating therethrough. The tray device includes a tray plate provided with external thread sleeves corresponding to the stud bolts one by one. The tray plate is placed on the bottom plate, and the external thread sleeves are inserted into mounting holes on the base of the concrete pillar. After the upper ends of the stud bolts penetrate upward through the external thread sleeves and the top surface of the base, they are fixed by first nuts. Track mortar is poured between the tray plate and the base. In the present invention, when the ground settlement is too large, the concrete pillar together with the tray device can be removed from the stud bolts, adjustment pads are placed, and then the concrete pillar together with the tray device is installed on the stud bolts. Thus, the concrete pillar can be reused, improving the efficiency and reducing the cost.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete track bridges, and particularly relates to a concrete track bridge pillar system and an adjustment method for coping with ground settlement. Background Art

[0002] Urban subways and urban railways, as a major means of transportation, play an important role in urban public transportation.

[0003] To ensure operation safety, subway and urban railway trains need to be regularly overhauled and maintained. To facilitate the train overhaul work, inspection pits are usually set up. However, the traditional wall-type inspection pits have a relatively small space, poor permeability, and inconvenient overhaul work. With the development of technology, they have now been replaced by track bridges.

[0004] Chinese invention patent CN110761124B discloses an assembled concrete track bridge, which is applied to EMU maintenance bases and subway train inspection yards for overhauling in-depot EMUs and subway vehicles. The assembled concrete track bridge is composed of concrete pillars, concrete foundations, rails, elastic rail fasteners, and embedded parts. The middle part of the concrete pillar has a polygonal cross-section, which is formed by a rectangle cross-section with concave arcs at four corners; both ends of the middle part are smoothly transitioned with the top and bottom of the concrete pillar; long circular through holes are opened on the inner sides of the four corners of the bottom rectangle cross-section of the concrete pillar, and the embedded parts pass through the long circular holes to connect the concrete pillar and the concrete foundation. The bottom of the concrete pillar and the concrete foundation are leveled and filled with track mortar.

[0005] However, affected by ground settlement, especially in the major cities in the Yangtze River Delta, North China Plain, and Fenwei Region, the concrete pillars sink accordingly, causing the track bridge to bend and deform, posing potential accident hazards. Therefore, when the ground settlement is too large, the height of the concrete pillar needs to be adjusted. In the above-mentioned solution, since the concrete pillar and the embedded part are cast into an integral structure, the concrete pillar can only be broken and remade, resulting in a long construction period, high labor intensity, and high cost.

[0006] In view of this, it is urgent to structurally improve the existing concrete track bridge pillar system to facilitate height adjustment after ground settlement, reduce costs, and improve efficiency. Summary of the Invention

[0007] Aiming at the above defects, the technical problem to be solved by the present invention is to provide a concrete track bridge pillar system and an adjustment method for coping with ground settlement, so as to solve the problem that when the ground settlement is too large, the existing concrete track bridge pillars can only be broken and remade, resulting in a long construction period, high labor intensity, and high cost.

[0008] To this end, a concrete track bridge pillar system provided by the present invention includes a concrete foundation and a concrete pillar. The concrete foundation is provided with embedded parts, and the embedded parts include a bottom plate. The bottom plate has a plurality of stud bolts vertically penetrating through it. It further includes:

[0009] A tray device, including a tray. The tray is provided with through holes corresponding to the stud bolts one by one. An external thread sleeve is fixed at the through holes. The inner diameter of the external thread sleeve is larger than the outer diameter of the stud bolt, and the height of the external thread sleeve is smaller than the thickness of the base of the concrete pillar. The tray is placed on the bottom plate. The external thread sleeve is inserted into the mounting holes on the base. After the upper end of the stud bolt passes upward through the external thread sleeve and the top surface of the base, it is fixed by a first nut. Track mortar is poured between the tray and the base.

[0010] In the above technical solution, preferably, a surrounding plate is provided at the edge of the tray, and the track mortar is poured into the space surrounded by the surrounding plate.

[0011] In the above technical solution, preferably, gaps are respectively formed between the surrounding plate and two opposite side walls of the base to form a first gap and a second gap. The surrounding plate is attached to the other two side walls of the base. The first gap is larger than the second gap, and the track mortar is poured from the first gap and flows out from the second gap.

[0012] In the above technical solution, preferably, the outer edges of the tray are respectively located outside the bottom plate.

[0013] In the above technical solution, preferably, a second nut is provided on the external thread sleeve, and the second nut abuts against the bottom surface of the base.

[0014] In the above technical solution, preferably, track mortar is poured between the mounting hole and the outer wall of the external thread sleeve.

[0015] In the above technical solution, preferably, an adjustment pad is provided between the bottom plate and the tray.

[0016] In the above technical solution, preferably, the top surface of the surrounding plate is higher than the top surface of the concrete foundation and the bottom surface of the base.

[0017] The present invention also provides an adjustment method for a concrete track bridge pillar system to cope with ground settlement, which is implemented by using the above concrete track bridge pillar system. The method includes the following steps:

[0018] When the ground subsides and the height of the concrete pillar needs to be adjusted, first remove the first nut, then lift the concrete pillar together with the tray device, pull it out from the stud, next, lay an adjustment pad on the top surface of the base plate of the embedded part, then install the concrete pillar together with the tray device on the stud, and finally install and tighten the first nut so that the tray presses against the adjustment pad on the base plate.

[0019] As can be seen from the above technical solution, a concrete track bridge pillar system provided by the present invention and an adjustment method for coping with ground subsidence solve the problems of the prior art that since the concrete pillar and the embedded part are cast into an integral structure, only the concrete pillar can be broken and remade, resulting in a long construction period, high labor intensity and high cost. Compared with the prior art, the present invention has the following beneficial effects:

[0020] The concrete pillar is installed on the embedded part through the tray device. The tray device includes a tray, on which there are externally threaded sleeves corresponding to the studs on the embedded part one by one. The externally threaded sleeves are inserted into the mounting holes on the base. After the upper end of the stud passes through the externally threaded sleeve and the top surface of the base upward, it is fixed by the first nut. When the ground subsidence is too large, the concrete pillar together with the tray device can be removed from the stud. After placing an adjustment pad on the base plate of the embedded part, the concrete pillar together with the tray device is installed on the stud again. Thus, the concrete pillar can be reused, solving the problem that the height of the current concrete track bridge pillar cannot be adjusted, and improving the efficiency and reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will make a brief introduction and description of the drawings required to be used in the description of 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.

[0022] Figure 1 It is a sectional view of the concrete track bridge pillar system provided by the present invention;

[0023] Figure 2 It is a schematic diagram of the embedded part in the present invention;

[0024] Figure 3 It is a schematic diagram of the bracket device in the present invention;

[0025] Figure 4 is Figure 1 The enlarged view of part A in

[0026] Figures 1 - 4 In

[0027] Concrete pillar 10, concrete foundation 20, embedded part 30, tray device 40, track mortar 50;

[0028] Base 11, first nut 12;

[0029] Bottom plate 31, stud 32, bent part 33;

[0030] Support plate 41, external thread sleeve 42, enclosing plate 43, first gap 44, second gap 45, second nut 46, adjusting pad 47. Specific implementation mode

[0031] Next, in combination with the attached drawings of the embodiments of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described. Obviously, the following described embodiments are only a part of the embodiments of the present invention, rather than all 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 belong to the scope protected by the present invention.

[0032] The implementation principle of the present invention is:

[0033] The concrete pillar is installed on the embedded part through the tray device. The tray device includes a support plate, on which there are external thread sleeves corresponding one by one to the studs on the embedded part. The external thread sleeves are sleeved on the studs and pass through the installation holes on the base. After the upper end of the stud passes through the top surfaces of the external thread sleeve and the base, it is fixed by the first nut.

[0034] The solution provided by the present invention is that after the ground settlement is too large, the concrete pillar together with the tray device can be removed from the stud. After placing the adjusting pad on the bottom plate, the concrete pillar together with the tray device is installed on the stud again. Thus, the concrete pillar can be reused, improving the efficiency and reducing the cost.

[0035] In order to make a clearer explanation and illustration of the technical solutions and implementation methods of the present invention, the following introduces several preferred specific embodiments for implementing the technical solutions of the present invention.

[0036] 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 use state as the reference object. Obviously, the use of the corresponding orientation words does not constitute a limitation to the protection scope of this solution.

[0037] Please refer to Figure 1 , Figure 1 is a sectional view of a concrete track bridge pillar system provided by the present invention.

[0038] As Figure 1As shown in the figure, a concrete track bridge pillar system provided by the present invention includes a concrete pillar 10, a concrete foundation 20, an embedded part 30, and a tray device 40. The concrete foundation 20 is provided with the embedded part 30, and the embedded part 30 is embedded in the concrete foundation 20. The concrete pillar 10 is installed on the embedded part 30 through the tray device 40.

[0039] Combined with Figure 2 As shown in the figure, the embedded part 30 includes a bottom plate 31, and a plurality of stud bolts 32 vertically penetrate through the bottom plate 31. In this embodiment, the base 11 of the concrete pillar 10 is of a square or rectangular structure, and 4 stud bolts 32 are provided corresponding to the four corners of the base 11. The upper end of the stud bolt 32 has a threaded part, and the lower end has a bent part 33. The bending directions of the bent parts 33 are such that the ends of two adjacent bent parts 33 are arranged oppositely. The part of the stud bolt 32 below the bottom plate 31 is embedded in the concrete foundation 20. After the embedded part 30 is embedded, the top surface of the bottom plate 31 is not covered with concrete.

[0040] Combined with Figure 3 As shown in the figure, the tray device 40 includes a tray 41, which is provided with through holes corresponding to the stud bolts 32 one by one. An external thread sleeve 42 is fixedly arranged at the through holes. For example, the external thread sleeve 42 is inserted into the through holes and fixed by welding or bonding or press-fitting. The inner diameter of the external thread sleeve 42 is larger than the outer diameter of the stud bolt 32, and there is a gap of 2 - 5 mm between the two, so that the external thread sleeve 42 can be sleeved on the stud bolt 32 and can move axially, so that the external thread sleeve 42 can be inserted and pulled out.

[0041] The tray 41 is placed on the bottom plate 31. The external thread sleeve 42 passes through the mounting holes on the base 11. After the upper end of the stud bolt 32 passes through the external thread sleeve 42 and the top surface of the base 11 upward, a first nut 12 is installed and fixed. The height of the external thread sleeve 42 is less than the thickness of the base 11 of the concrete pillar 10. Therefore, the tray 41 can be pressed tightly on the bottom plate 31 through the first nut 12.

[0042] Track mastic 50 is poured between the tray 41 and the base 11.

[0043] Combined with Figure 3 As shown in the figure, the outer edge of the tray 41 is provided with a surrounding plate 43. The surrounding plate 43 is rectangular and forms a circumferentially closed structure. The surrounding plate 43 can be directly fixed to the tray 41 or made into a detachable structure.

[0044] The track mastic 50 is poured into the space surrounded by the surrounding plate 43. The top surface of the surrounding plate 43 is higher than the top surface of the concrete foundation 20 and the bottom surface of the base 11, so as to prevent the track mastic from entering between the tray and the bottom plate when pouring the track mastic, causing the problem that it is not easy to loosen the two.

[0045] Among them, in addition to steel and iron materials, the tray device 40 can also use high-density polyethylene plates for the pallet 41 and the surrounding plate 43, and the external thread sleeve 42 can use glass fiber reinforced polyamide 66. Compared with steel and iron materials, non-metallic materials are more corrosion-resistant, extending the service life and making it easier to insert and remove.

[0046] The cross-section of the base 11 is rectangular. The gaps between the inner wall of the surrounding plate 43 and the two opposite side walls of the base 11 form a first gap 44 and a second gap 45 respectively, and the first gap 44 is larger than the second gap 45. The inner wall of the surrounding plate 43 is attached to the other two side walls of the base 11. The track caulking 50 is poured from the first gap 44 and flows out from the second gap 45. When the track caulking 50 flows out to a height of 1-2 cm, the pouring of the track caulking 50 is stopped. This pouring method from the end with a larger gap to the end with a smaller gap can ensure good fluidity during the pouring of the track caulking, and the track caulking is more dense after pouring, ensuring strength.

[0047] The outer edge of the pallet 41 is located outside the bottom plate 31, so that the projection surface of the pallet 41 completely covers the bottom plate 31, preventing the track caulking 50 from entering between the pallet 41 and the bottom plate 31 during the pouring of the track caulking, making it easier for the two to separate.

[0048] A second nut 46 is provided on the external thread sleeve 42. The second nut 46 abuts against the bottom surface of the base 11, and there is a gap between the second nut 46 and the pallet 41. By adjusting the 4 second nuts 46, the verticality and height of the concrete pillar 10 can be adjusted.

[0049] The track caulking 50 is also poured between the installation hole and the outer wall of the external thread sleeve 42, so that the concrete pillar 10 and the tray device 40 are consolidated into a whole, avoiding shaking caused by the gap between the installation hole and the external thread sleeve 42 and causing fatigue damage.

[0050] An adjusting pad 47 is provided between the bottom plate 31 and the pallet 41 for adjusting the height of the concrete pillar 10.

[0051] The construction method of the concrete track bridge pillar system provided by the present invention is as follows:

[0052] First, embed the embedded part 30 in the concrete foundation 20.

[0053] Then, install the tray device 40 on the embedded part 30. Specifically, the external thread sleeve 42 is sleeved on the stud 32 and pressed down so that the pallet 41 presses on the bottom plate 31.

[0054] Third, install the second nut 46 on the external thread sleeve 42.

[0055] Fourth, insert the mounting holes on the base 11 of the concrete pillar 10 through the external thread sleeve 42, and make the bottom surface of the base 11 abut against the second nut 46.

[0056] Fifth, adjust each second nut 46 to keep the concrete pillar 10 in a vertical state and the height meets the design requirements.

[0057] Sixth, install and tighten the first nut 12 to press the support plate 41 against the bottom plate 31.

[0058] Seventh, pour the track mortar 50 from the first gap 44, and stop pouring after the track mortar flows out from the second gap 45; pour the track mortar 50 between the mounting hole of the base 11 and the outer wall of the external thread sleeve 42.

[0059] For the adjustment method of the concrete track bridge pillar system provided by the present invention to cope with ground settlement, when the ground settlement is too large and the height of the concrete pillar 10 needs to be adjusted, first remove the first nut 12, then lift the concrete pillar 10 together with the tray device 40, pull it out from the stud 32. Next, lay an adjustment pad on the top surface of the bottom plate 31 of the embedded part 30, and then install the concrete pillar 10 together with the tray device 40 on the stud 32, install and tighten the first nut 12 to press the support plate 41 against the adjustment pad on the bottom plate 31. For the concrete around the base 11, appropriate repair can be carried out.

[0060] Based on the description of the above specific embodiments, the concrete track bridge pillar system provided by the present invention and its adjustment method for coping with ground settlement have the following advantages compared with the prior art:

[0061] First, the external thread sleeve on the bracket device is sleeved on the stud of the embedded part, and can be inserted and pulled out. When the ground settlement is too large, the concrete pillar together with the tray device can be removed from the stud, an adjustment pad is placed on the bottom plate of the embedded part, and then the concrete pillar together with the tray device is installed on the stud. Thus, the concrete pillar can be reused, improving the efficiency and reducing the cost.

[0062] Second, the external thread sleeve is provided with a second nut, and the second nut abuts against the bottom surface of the base. The verticality of the concrete pillar can be adjusted and the height of the concrete pillar can be finely adjusted by adjusting the second nut.

[0063] Third, the outer edge of the support plate is fixedly provided with a surrounding plate, and the track mortar is poured into the space surrounded by the surrounding plate, avoiding the problem that when pouring the track mortar, the track mortar enters between the support plate and the bottom plate, making it difficult to loosen the two.

[0064] Fourth, gaps are respectively formed between the enclosing plate and two opposite side walls of the base, namely a first gap and a second gap, and the first gap is larger than the second gap. The track caulking is poured from the first gap and flows out from the second gap, which can ensure good fluidity during the pouring process of the track caulking. After pouring, the track caulking is denser, ensuring strength.

[0065] 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 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 another identical element in the process, method, article or device including the said element.

[0066] The present invention is not limited to the above best embodiment. 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 concrete track bridge pillar system, comprising a concrete foundation and a concrete pillar, characterized in that, Further included are: An embedded part, which is embedded in the concrete foundation, The embedded part includes a bottom plate, and a plurality of stud bolts vertically penetrating through the bottom plate are provided; A tray device, including a tray, which is provided with through holes corresponding to the stud bolts one by one. An external thread sleeve is fixed at the through holes. The inner diameter of the external thread sleeve is larger than the outer diameter of the stud bolt, and the height of the external thread sleeve is smaller than the thickness of the base of the concrete pillar; The tray is placed on the bottom plate, the external thread sleeve is inserted into the mounting hole on the base, and after the upper end of the stud bolt penetrates upward through the external thread sleeve and the top surface of the base, it is fixed by a first nut; Track mortar is poured between the tray and the base; A surrounding plate is provided at the edge of the tray. The surrounding plate is rectangular and forms a circumferentially closed structure. The track mortar is poured into the space surrounded by the surrounding plate; Gaps between the surrounding plate and two opposite side walls of the base respectively form a first gap and a second gap. The surrounding plate is attached to the other two side walls of the base. The first gap is larger than the second gap, and the track mortar is poured from the first gap and flows out from the second gap; Each outer edge of the tray is located outside the bottom plate; Track mortar is poured between the mounting hole and the outer wall of the external thread sleeve; An adjusting pad is provided between the bottom plate and the tray.

2. The concrete track bridge pillar system according to claim 1, characterized in that, A second nut is provided on the external thread sleeve, and the second nut abuts against the bottom surface of the base.

3. The concrete track bridge pillar system according to claim 1, characterized in that, The top surface of the surrounding plate is higher than the top surface of the concrete foundation and the bottom surface of the base.

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