An adjustable support

Abstract

The utility model belongs to the field of bridge, building and other engineering structure seismic mitigation and isolation device, concretely relates to an adjustable support, including upper seat board, lower seat board and bottom plate, the upper seat board and lower seat board between additional elastic support assembly, the bottom plate is detachably fixed with a plurality of adjusting shim by the help of bolt, the adjusting shim set up around lower seat board and embed and fix in the bottom plate, the lower seat board moves with the bottom plate and lower building component and extrudes elastic support assembly. The utility model adopts the mode of additional elastic support assembly, when the upper seat board, lower seat board and bottom plate relatively slide, provide the elastic force of reset direction, so that the lower seat board and bottom plate relatively reset the trend of upper seat board when the subsequent displacement occurs, the occurrence of auxiliary reset movement, when the relative displacement exceeds the design deformation, can replace the adjusting shim on the bottom plate, so that the lower seat board is perpendicular to the upper seat board again, realizes the reset of support.

Description

Technical Field

[0001] This utility model belongs to the field of seismic isolation and vibration reduction devices for engineering structures such as bridges and buildings, and specifically relates to an adjustable support. Background Technology

[0002] Bridge and building bearings have advantages such as simple structure, simple parameters, stable performance, high durability, and easy quality control, leading to their increasingly widespread engineering applications. However, in fault zones, bridge and building bearings may experience cumulative displacement due to geological activity. Once displaced, the bearings are generally difficult to reposition, resulting in reduced load-bearing capacity. These drawbacks affect the stability and performance of bridge and building structures. Utility Model Content

[0003] In order to solve the problems existing in the prior art, the present invention provides an adjustable support that can conveniently indicate displacement and generate a reset thrust, which helps the support structure to reset.

[0004] The specific technical solution adopted in this utility model is as follows:

[0005] An adjustable support includes an upper support plate, a lower support plate, and a base plate. The lower support plate is clamped between the upper support plate and the base plate. The upper support plate is fixed to an upper building component by means of an anchoring device, and the lower support plate is fixed to a lower building component by means of an anchoring device. An elastic support assembly is added between the upper support plate and the lower support plate. Multiple adjusting pads are detachably fixed to the base plate by bolts. The adjusting pads are arranged around the lower support plate and fit and fix the lower support plate to the base plate. The lower support plate moves with the base plate and the lower building component and compresses the elastic support assembly.

[0006] An intermediate plate is sandwiched between the upper and lower seat plates. A friction lubrication layer is provided between the intermediate plate and both the upper and lower seat plates. A friction lubrication layer is also provided on the contact surface between the bottom plate and the lower seat plate.

[0007] The elastic support assembly includes a leaf spring, a preload bolt, and a preload strip. The edge of the upper seat plate is provided with a limiting down-turned edge, and a baffle is fixed at the bottom of the limiting down-turned edge. The baffle, the limiting down-turned edge, and the upper seat plate form a telescopic groove to accommodate the leaf spring. The preload bolt passes through the limiting down-turned edge horizontally and forms an adjustable threaded connection with the threaded hole provided on the preload strip. The leaf spring is clamped between the preload strip and the limiting down-turned edge. The preload strip extends out of the side of the telescopic groove and abuts against the lower seat plate.

[0008] The elastic support components are arranged in multiple sets in a mirror image on both sides of the lower seat plate.

[0009] The elastic support assembly includes a stop arm mounted on the lower seat plate, a limiting post mounted on the upper seat plate, and a limiting rod connecting the stop arm and the limiting post. Multiple disc springs are sleeved on the limiting rod, and the stop arm and the limiting post abut against and fix the disc springs.

[0010] The disc springs and limiting posts are symmetrically arranged on both sides of the stop arm, and at least one set of the elastic support components is symmetrically arranged on opposite sides of the lower seat plate.

[0011] The lower seat plate is provided with a concave basin-shaped structure, and the middle plate is in the shape of a disc, with its bottom surface matching and fitting the curved surface of the basin-shaped structure of the lower seat plate.

[0012] The beneficial effects of this utility model are:

[0013] This utility model adopts the method of adding an elastic support component to provide elastic force in the reset direction when the upper seat plate, lower seat plate and base plate slide relative to each other. This makes the lower seat plate and base plate tend to reset relative to the upper seat plate when subsequent displacement occurs, and assists in the reset movement. When the relative displacement exceeds the design deformation, the lower seat plate can be realigned with the upper seat plate by replacing the adjustment shim on the base plate, so as to realize the support reset. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0015] Figure 2 for Figure 1 A diagram from a top-down perspective;

[0016] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0017] Figure 4 for Figure 3 A diagram from a top-down perspective;

[0018] In the attached diagram, 1. Upper seat plate, 2. Lower seat plate, 3. Base plate, 4. Adjusting pad, 5. Leaf spring, 6. Preload bolt, 7. Preload strip, 8. Limiting downward edge, 9. Baffle, 10. Stop arm, 11. Limiting post, 12. Limiting rod, 13. Disc spring, 14. Intermediate plate. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0020] like Figure 1 and Figure 3As shown, this utility model is an adjustable support, including an upper support plate 1, a lower support plate 2, and a base plate 3. The lower support plate 2 is sandwiched between the upper support plate 1 and the base plate 3. The upper support plate 1 is fixed to the upper building component by means of an anchoring device, and the lower support plate 2 is fixed to the lower building component by means of an anchoring device. An elastic support assembly is added between the upper support plate 1 and the lower support plate 2. Multiple adjusting pads 4 are detachably fixed on the base plate 3 by means of bolts. The adjusting pads 4 are arranged around the lower support plate 2 and fit and fix the lower support plate 2 on the base plate 3. The lower support plate 2 moves with the base plate 3 and the lower building component and compresses the elastic support assembly.

[0021] This invention employs an added elastic support component. When the upper seat plate 1, lower seat plate 2, and base plate 3 slide relative to each other, the elastic support component generates a spring force in the reset direction through compression deformation. Although it cannot directly push the lower seat plate 2 to reset, the tendency for the lower seat plate 2 and base plate 3 to reset relative to the upper seat plate 1 becomes more pronounced when subsequent displacement occurs, or the movement distance is increased in the direction of displacement to facilitate reset. This invention reserves a 15mm to 20mm adjustment space between the upper seat plate 1 and the lower seat plate 2 as a design deformation variable. When the relative displacement exceeds the design deformation variable, the adjustment pad 4 on the base plate 3 can be replaced. The adjustment pad 4 is a rectangular structure, and there is an adjustment distance between the bolt fixing holes and the edge of the adjustment pad 4 abutting the lower seat plate 2. Therefore, by replacing the adjustment pad 4 with different adjustment distances, the lower seat plate 2 can be realigned with the upper seat plate 1, enabling subsequent manual adjustment of the support reset.

[0022] Furthermore, such as Figure 1 and Figure 3 As shown, an intermediate plate 14 is sandwiched between the upper seat plate 1 and the lower seat plate 2. A friction lubrication layer is provided between the intermediate plate 14 and both the upper seat plate 1 and the lower seat plate 2. A friction lubrication layer is also provided on the contact surface between the bottom plate 3 and the lower seat plate 2.

[0023] The friction lubrication layer is designed as a low-friction coefficient friction pair filled with silicone grease, which facilitates the sliding of the lower seat plate 2 during the adjustment construction, and at the same time facilitates the swing of the intermediate plate 14 relative to the upper seat plate 1 and the lower seat plate 2, so that the support can cope with torsion and deflection displacement.

[0024] Specific embodiment 1, such as Figure 1 and Figure 2As shown, the elastic support assembly of this embodiment includes a leaf spring 5, a preload bolt 6, and a preload strip 7. The edge of the upper seat plate 1 is provided with a limiting down-turned edge 8. A baffle 9 is fixed at the bottom of the limiting down-turned edge 8. The baffle 9, the limiting down-turned edge 8, and the upper seat plate 1 form a telescopic groove to accommodate the leaf spring 5. The preload bolt 6 passes through the limiting down-turned edge 8 in the horizontal direction and forms an adjustable threaded connection with the threaded hole provided on the preload strip 7. The leaf spring 5 is clamped between the preload strip 7 and the limiting down-turned edge 8. The preload strip 7 extends out of the side of the telescopic groove and abuts against the lower seat plate 2.

[0025] Multiple sets of the elastic support components are arranged in a mirror image on both sides of the lower seat plate 2.

[0026] The adjustable support has a 15mm-20mm adjustment space reserved between the limiting downward edge 8 of the upper support plate 1 and the side wall of the lower support plate 2 in the support limiting direction, to accommodate the cumulative deformation of the bridge substructure in the fault zone area; the anchoring device is an anchor bolt, and an assembled, detachable adjusting shim 4 is set in the area where the anchor bolt of the lower support plate 2 is located. When the cumulative displacement of the bridge substructure reaches the reserved adjustment amount of 15mm-20mm, the size of the adjusting shim 4 can be changed by replacement or cutting to accommodate the offset after the support is reset, that is, at the abutment of the upper support plate 1 and the lower support plate 2. On one side, a larger adjusting shim 4 is replaced, and a smaller adjusting shim 4 is replaced on the side of the upper seat plate 1 that is separated from the lower seat plate 2, so that the lower seat plate 2 is still clamped and fitted on the base plate 3, but the position of the lower seat plate 2 relative to the upper seat plate 1 is changed and realigned; a base plate 3 with a friction pair is added to the lower part of the lower seat plate 2. The design of the low friction coefficient friction pair with silicone grease lubrication facilitates the sliding of the lower seat plate 2 during the adjustment construction; the base plate 3 is designed with its external dimensions increased in advance according to the maximum offset given in the local geological survey report, leaving construction space for the gradual replacement of adjusting shims 4.

[0027] To ensure sufficient lateral stiffness of the entire bridge, enabling the supports to overcome the effects of train loads and braking forces, and maintaining the structural safety of the bridge deck and the smooth operation of vehicles, a leaf spring 5 component is added in the support's limiting direction. When using the leaf spring 5 component, the size of the leaf spring 5 is selected reasonably according to the stiffness requirements. During support assembly, the leaf spring 5 is pre-compressed to the design value by pulling the pre-compression bar with the pre-compression bolt 6, so that its subsequent deformation meets the design adjustment range of 15mm to 20mm in the limiting direction. When it is found that the exposed size of the pre-compression bolt 6 reaches the design value, the support can be reset by replacing the lower assembled adjustment shim 4.

[0028] Specific embodiment 2, this embodiment for example Figure 3 and Figure 4As shown, the elastic support assembly includes a stop arm 10 disposed on the lower seat plate 2, a limiting post 11 disposed on the upper seat plate 1, and a limiting rod 12 connecting the stop arm 10 and the limiting post 11. Multiple sets of disc springs 13 are sleeved on the limiting rod 12, and the stop arm 10 and the limiting post 11 abut against and fix the disc springs 13.

[0029] The disc spring 13 and the limiting post 11 are symmetrically arranged on both sides of the stop arm 10, and at least one set of the elastic support assembly is symmetrically arranged on the opposite sides of the lower seat plate 2.

[0030] The difference between this embodiment and Embodiment 1 is the use of disc spring 13. The size of disc spring 13 is reasonably selected according to the stiffness requirements, and the disc spring 13 is pre-compressed to the design value during the support assembly so that its subsequent deformation meets the 15mm to 20mm adjustment amount designed in the limiting direction. When it is found that the displacement dimension of the stop arm 10 of the lower base plate 2 reaches the design value, the support can be reset by replacing the lower assembled adjustment pad 4.

[0031] The lower seat plate 2 is provided with a concave basin-shaped structure, and the middle plate 14 is a disc-shaped structure with its bottom surface matching and fitting the curved surface of the basin-shaped structure of the lower seat plate 2.

[0032] In summary, this utility model adds an elastic support component and an adjusting pad 4. The elastic support component can be either a leaf spring 5 or a disc spring 13. The elastic support component and the adjusting pad 4 work together to achieve adjustable reset. This provides a solution to the problem of excessive cumulative displacement of supports caused by geological activity in fault zone areas.

Claims

1. An adjustable support, comprising an upper support plate (1), a lower support plate (2), and a base plate (3), wherein the lower support plate (2) is sandwiched between the upper support plate (1) and the base plate (3), the upper support plate (1) is fixed to an upper building component by means of an anchoring device, and the lower support plate (2) is fixed to a lower building component by means of an anchoring device, characterized in that: An elastic support assembly is provided between the upper seat plate (1) and the lower seat plate (2). Multiple adjusting pads (4) are detachably fixed on the base plate (3) by means of bolts. The adjusting pads (4) are arranged around the lower seat plate (2) and the lower seat plate (2) is fitted and fixed on the base plate (3). The lower seat plate (2) moves with the base plate (3) and the building components below and squeezes the elastic support assembly.

2. The adjustable support according to claim 1, characterized in that: An intermediate plate (14) is sandwiched between the upper seat plate (1) and the lower seat plate (2). A friction lubrication layer is provided between the intermediate plate (14) and the upper seat plate (1) and the lower seat plate (2). A friction lubrication layer is also provided on the contact surface between the bottom plate (3) and the lower seat plate (2).

3. The adjustable support according to claim 1, characterized in that: The elastic support assembly includes a leaf spring (5), a preload bolt (6), and a preload strip (7). The edge of the upper seat plate (1) is provided with a limiting down-turned edge (8). A baffle (9) is fixed at the bottom of the limiting down-turned edge (8). The baffle (9), the limiting down-turned edge (8), and the upper seat plate (1) form a telescopic groove to accommodate the leaf spring (5). The preload bolt (6) passes through the limiting down-turned edge (8) in the horizontal direction and forms an adjustable threaded connection with the threaded hole provided on the preload strip (7). The leaf spring (5) is clamped between the preload strip (7) and the limiting down-turned edge (8). The preload strip (7) extends out of the side of the telescopic groove and abuts against the lower seat plate (2).

4. The adjustable support according to claim 3, characterized in that: The elastic support components are arranged in multiple sets on the two symmetrical sides of the lower seat plate (2) in a mirror image.

5. The adjustable support according to claim 1, characterized in that: The elastic support assembly includes a stop arm (10) on the lower seat plate (2), a limiting post (11) on the upper seat plate (1), and a limiting rod (12) connecting the stop arm (10) and the limiting post (11). Multiple disc springs (13) are sleeved on the limiting rod (12), and the stop arm (10) and the limiting post (11) abut against and fix the disc springs (13).

6. The adjustable support according to claim 5, characterized in that: The disc spring (13) and the limiting post (11) are symmetrically arranged on both sides of the stop arm (10), and at least one set of the elastic support assembly is symmetrically arranged on the opposite sides of the lower seat plate (2).

7. The adjustable support according to claim 2, characterized in that: The lower seat plate (2) is provided with a concave basin-shaped structure, and the middle plate is in the shape of a disc, with its bottom surface matching and fitting the curved surface of the basin-shaped structure of the lower seat plate (2).

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