Bridge support limiting structure

Abstract

The utility model provides a bridge support limiting structure, and belongs to the field of bridge seismic resistance. The bridge support limiting structure is composed of a support padstone, a detachable blocking piece device, a buffer layer and a support. Continuous bosses are arranged on three surfaces above the support pad stone, and a detachable stopper device is arranged on one side of the support pad stone, so that replacement and height adjustment of the support are facilitated. Meanwhile, the boss and the detachable blocking piece device form a closed space, horizontal displacement of the bridge support under the earthquake can be effectively limited, the bridge support is prevented from generating large deviation, and therefore the safety of an upper structure is protected. The bridge support limiting structure is high in bearing capacity, easy to construct, capable of being correspondingly designed according to different earthquake fortification requirements, simple in structure and high in cost performance.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge earthquake resistance design, and particularly to a bridge support limiting structure. Background Art

[0002] Bridge bearings are important connecting devices between the superstructure and the piers, and their safety is inseparable from the safety of the bridge structure. However, under the action of earthquake loads, the earthquake shock waves transmitted through the piers can cause the bridge bearings to deviate or even fall from the cap beam, causing damage to the superstructure such as beam fall. Therefore, it is very important to effectively control the horizontal displacement of the bridge bearings and protect the safety of the superstructure. At the same time, due to factors such as uneven foundation settlement, bridge bearings are prone to local or overall hollowing out, and the bearings need to be raised or replaced, which puts higher requirements on bridge bearings.

[0003] Therefore, designing a bridge bearing limit structure that can effectively limit the horizontal displacement of the bridge bearing under seismic loads while allowing the bridge bearing to have the function of easy replacement and height adjustment has broad market prospects. Utility Model Content

[0004] In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides a bridge bearing limiting structure, which aims to effectively limit the horizontal displacement of the bridge bearing while allowing the bridge bearing to have the function of easy replacement and height adjustment.

[0005] The utility model adopts the following technical scheme: a bridge support limiting structure, comprising:

[0006] A support stone having a support surface;

[0007] The continuous boss is arranged on the support surface of the support pad stone, and is generally cast integrally with the support pad stone under the support surface by reinforced concrete; the continuous boss forms a semi-enclosed area on the support surface;

[0008] A stopper device is detachably mounted on the support surface; the stopper device and the semi-enclosed area form a closed area; the closed area is used to place a support and limit the horizontal displacement of the support.

[0009] In a further embodiment, the blocking device comprises:

[0010] The baffle has a predetermined shape; the baffle is provided with a plurality of baffle holes;

[0011] A plurality of anchor rods are pre-buried in the support pad stone; the anchor rods are provided with anchor rod holes along their axial direction, and the anchor rod holes are adapted to the baffle holes;

[0012] A plurality of fasteners pass through the baffle plate holes and the anchor rod holes in sequence to achieve a fixed connection between the baffle plate and the anchor rod.

[0013] In a further embodiment, the anchor rod comprises: a steel rod, a sleeve fixed on the top of the steel rod, and an upper hole axially opened in the sleeve.

[0014] In a further embodiment, a buffer layer is closely attached to the inner surface of the continuous boss.

[0015] In a further embodiment, the cross section of the continuous boss is U-shaped.

[0016] In a further embodiment, the buffer layer is a material with buffering function such as a chloroprene rubber layer or a polyurethane layer.

[0017] Beneficial effects of the utility model: the closed area structure formed by the three-sided continuous bosses and the detachable blocking device is reliable and can effectively limit the position of the bridge support within the closed area;

[0018] The detachable stopper device has a simple structure, and the stopper can be removed by simply twisting the fastener, which is convenient for adjusting the height and replacing the bridge support. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a bridge support limiting structure in Example 1;

[0020] Figure 2 is a schematic diagram of the support pad stone structure in Example 1;

[0021] Figure 3 is a half-section view of the structure of the detachable stopper device in Example 1;

[0022] Figure 4 is a schematic structural diagram of the baffle in Example 1;

[0023] Figure 5 is a schematic structural diagram of the fastener in Example 1;

[0024] Figure 6 is a schematic structural diagram of the anchor rod in Example 1;

[0025] Figure 7 is a schematic structural diagram of the buffer layer in Example 1;

[0026] Figure 8 is a schematic diagram of a bridge support limiting structure in Example 1 applied to a bridge structure;

[0027] Fig. 9 is a schematic diagram of the support replacement in Example 2;

[0028] Fig.10It is a schematic diagram of further height adjustment of the bearing in Embodiment 3.

[0029] Figures 1 to 10 The markings in [Figure] are as follows: bearing pad stone 1, retaining device 2, buffer layer 3, bearing 4, superstructure 5, jacking device 6, height-adjusting shim 7, lower cushion stone 11, support surface 12, continuous convex platform 13, baffle 21, baffle hole 211, fastener 22, anchor rod 23, upper hole 231, sleeve 232. Detailed implementation manners

[0030] The present utility model will be further described below in conjunction with the accompanying drawings of the specification and embodiments.

[0031] Embodiment 1

[0032] A bridge bearing limiting structure, as Figure 1 shown, includes: a bearing pad stone 1, defining its upper surface as a support surface 12. A continuous convex platform 13 is provided on the support surface 12 of the bearing pad stone 1, forming a semi-closed area on the support surface 12. Further, in this embodiment, the cross-section of the continuous convex platform 13 is U-shaped. At the opening position of the U-shape, a detachable and installable retaining device 2 is provided, and the retaining device 2 and the semi-closed area form a closed area; the closed area is used to place and limit the bearing 4.

[0033] Further, in combination with Figures 2 to 6 , the bearing pad stone 1 further includes, in addition to the support surface 12: a lower cushion stone 11, that is, the continuous convex platform 13 and the lower cushion stone 11 are cast in situ together. At the same time, the height and width of the continuous convex platform 13 are reasonably designed according to the seismic fortification requirements.

[0034] Further, the retaining device 2 includes: a baffle 21 having a predetermined shape. A plurality of baffle holes 211 are provided on the baffle 21. It further includes: a plurality of anchor rods 23 embedded in the bearing pad stone 1, and the anchor rods 23 are axially provided with anchor rod holes, and the anchor rod holes are adapted to the baffle holes 211. A plurality of fasteners 22 sequentially pass through the baffle holes 211 and the anchor rod holes to realize the fixed connection between the baffle 21 and the anchor rod 23.

[0035] Further, the anchor rod 23 includes: a steel rod, a sleeve 232 fixed to the top of the steel rod, and an upper hole 231 axially provided in the sleeve 232.

[0036] During construction, the anchor rod 23 needs to be first welded and fixed together with the steel reinforcement cage in the bearing pad stone 1, and then concrete is poured to form an integral body. When pouring concrete, attention should be paid to avoiding foreign matters from entering the anchor rod 23, so as not to affect the installation of the fastener 22. When installing the baffle 21 and the fastener 22, the baffle hole 211 and the anchor rod hole should be aligned, and then the fastener 22 is screwed in.

[0037] In a further embodiment, the inner surface of the continuous boss 13 is in close contact with the buffer layer 3. Figure 7 As shown, the buffer layer 3 is made of buffer materials such as chloroprene rubber and polyurethane, and is firmly connected to the inner side of the continuous boss 13 by bonding or the like.

[0038] Combination Figures 1 to 8 Under the seismic load, the seismic impact force is transmitted to the support pad 1 and the support 4 through the bridge piers. The support 4 dissipates the seismic impact force through its own deformation to reduce the seismic energy transmitted to the upper structure 5. In rare earthquakes, the support 4 will undergo a large shear deformation, and even produce a displacement from the original position. When deflecting toward the three-sided continuous boss 13, the support 4 first contacts the buffer layer 3, and the buffer layer 3 is squeezed and deformed while buffering the impact force of the support 4. Finally, the buffered impact force of the support 4 is input into the continuous boss 13. The steel bars in the continuous boss 13 are reasonably arranged, which can effectively resist the impact force of the support 4 and limit the support 4 from further deflecting toward the semi-enclosed side formed by the continuous boss 13.

[0039] When deflecting toward the detachable blocking device 2, the baffle 21, fastener 22, and anchor rod 23 of the detachable blocking device 2 are closely matched to jointly bear the impact force of the support 4, and limit the support 4 from further deflecting toward the opening side. The closed area formed by the continuous boss 13 and the detachable blocking device 2 is reasonably designed and simple in structure, which can effectively prevent the support 4 from deflecting and protect the safety of the upper structure 5.

[0040] Example 2

[0041] like Fig. 9 As shown, unlike Example 1, this example introduces a method for replacing the support 4 under the position limiting structure of the support 4. First, use the lifting device 6 to slightly lift the upper structure 5 by 2 to 3 mm, loosen the fastener 22 with a wrench, and then take out the fastener 22 and the baffle 21 in turn to form an opening. The support 4 to be replaced can be moved out from the opening side and the new support 4 can be installed to the designed position. Then, the baffle 21 and the fastener 22 are reinstalled in turn, the upper structure 5 is adjusted back to the original position, and the lifting device 6 is removed to complete the replacement of the support 4. Under the position limiting structure of the support 4, the replacement process of the support 4 is simple and the construction is convenient.

[0042] Example 3

[0043] like Fig.10As shown, unlike embodiments 1 and 2, this embodiment introduces a method for adjusting the height of the support 4 under the position limiting structure of the support 4. First, use the lifting device 6 to slightly lift the upper structure 5 by 2 to 3 mm, loosen the fastener 22 with a wrench, and then take out the fastener 22 and the baffle 21 in turn to form an opening, then move the support 4 out from the opening side, put in a certain number of height adjustment pads 7 as needed, and install the support 4 to its original position, then reinstall the baffle 21 and the fastener 22 in turn, drop the upper structure 5 back to the top surface of the support 4, remove the lifting device 6, and complete the height adjustment of the support 4. Under the position limiting structure of the support 4, the height adjustment process of the support 4 is simple and the construction is convenient.

[0044] The above description is only a preferred embodiment of the present invention, but the application of the present invention is not limited thereto. The application object can be transformed and modified within a reasonable range, and these transformations and modifications will fall within the protection scope of the present invention.

Claims

1. A bridge support limiting structure, characterized in that: include: A support stone having a support surface; The continuous boss is arranged on the support surface of the support pad stone and is integrally formed by pouring reinforced concrete together with the support pad stone under the support surface; the continuous boss forms a semi-enclosed area on the support surface; A stopper device is detachably mounted on the support surface; the stopper device and the semi-enclosed area form a closed area; the closed area is used to place a support and limit the horizontal displacement of the support.

2. A bridge support limiting structure according to claim 1, characterized in that: The blocking device comprises: The baffle has a predetermined shape; the baffle is provided with a plurality of baffle holes; A plurality of anchor rods are pre-buried in the support pad stone; the anchor rods are provided with anchor rod holes along their axial direction, and the anchor rod holes are adapted to the baffle holes; A plurality of fasteners pass through the baffle plate holes and the anchor rod holes in sequence to achieve a fixed connection between the baffle plate and the anchor rod.

3. A bridge support limiting structure according to claim 2, characterized in that: The anchor rod comprises: a steel rod, a sleeve fixed on the top of the steel rod, and an upper hole axially opened in the sleeve.

4. A bridge support limiting structure according to claim 1, characterized in that: The inner surface of the continuous boss is closely attached to a buffer layer.

5. A bridge support limiting structure according to claim 1, characterized in that: The cross section of the continuous boss is U-shaped.

6. A bridge support limiting structure according to claim 4, characterized in that: The buffer layer is a chloroprene rubber layer or a polyurethane layer and has a buffer function.

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