Anti-seismic and anti-falling beam structure of bridge

Abstract

The utility model discloses an anti-seismic and anti-falling beam structure of a bridge, and belongs to the technical field of bridges. An anti-seismic and anti-beam-falling structure of a bridge is characterized in that a lower check block device is arranged on the pier top of a pier, the lower check block device is arranged between two supports on the pier, an upper check block is fixedly arranged at the position, corresponding to the lower check block device, of the bottom of the bridge at the position of the pier, and the lower check block device is arranged on the upper check block. The lower check block device comprises two lower check blocks and at least one transverse check block, the two lower check blocks are fixed to the pier top of the pier at intervals in the transverse bridge direction, the transverse check block is connected between the two lower check blocks through bolts, and a containing cavity capable of containing the upper check block is formed between the lower check blocks and the transverse check block. The upper check block is embedded in a containing cavity formed by the lower check block and the transverse check block. The device is simple in structure, low in manufacturing cost, low in construction difficulty, free of occupying the maintenance space of the support, not prone to being stuck and convenient to maintain in the later period.

Description

Technical Field

[0001] The utility model relates to an earthquake-resistant and anti-falling beam structure for a bridge, belonging to the technical field of bridges. Background Art

[0002] The measures to prevent the bridge from falling under earthquake conditions are a very important part of the seismic fortification measures for bridges. At present, the conventional measures to prevent the bridge from falling are mainly chain rod type, wire rope type and block type. The chain rod type is to connect the beam body with the pier cap or cap beam through steel components or steel chain components, which is similar to "tying" the beam body to the pier, thereby preventing the beam from falling; the wire rope type is to "tie" the cross beams of the two adjacent spans of the beam body together with steel wire ropes or steel strands, thereby preventing the beam from falling; the block type is to block the beam body with a block extending from the pier or from the bottom of the beam to block the pier, which plays a role in preventing the beam from falling after the bearing fails.

[0003] Chain rod and wire rope anti-falling measures are not widely used at present because of their complex structure, difficult design, high construction process requirements and high cost. They are mostly used in high-intensity earthquake areas. Block anti-falling measures are mostly used in low-intensity earthquake areas because of their low cost and convenient construction. At present, most block anti-falling beam designs arrange blocks on both sides of the bridge pier cap or bridge pier cap, which can only play a horizontal anti-falling beam role. If longitudinal anti-falling beam blocks are set at the same time, the horizontal and longitudinal blocks will surround the bearings, making it impossible to carry out later inspection, maintenance and replacement of the bearings. Considering this problem, some designers move the blocks to the middle area of ​​the bearings, or groove the top of the pier, and the beam bottom blocks go deep into the groove, so as to play a role in limiting the anti-falling beam. However, the biggest disadvantage of this structure is that the gap between the groove and the block (generally between 5 and 10 cm) is small. Construction errors or poor protection during construction will cause slag to fall or dust to accumulate in the gap in the later period, which will cause it to get stuck and lose its mobility. It cannot be repaired after later damage, which is easy to affect the force of the bridge pier itself. Utility Model Content

[0004] In view of the defects of the current block-type earthquake-resistant and anti-falling beam structure, the utility model proposes a new earthquake-resistant and anti-falling beam structure for bridges, which has low cost, low construction difficulty, does not occupy support maintenance space, is not easy to get stuck, and is convenient for later maintenance.

[0005] The utility model is realized through the following technical scheme: a bridge anti-seismic anti-falling beam structure, characterized in that: a lower stop block device is arranged on the pier top of the bridge pier, and the lower stop block device is arranged between two supports on the bridge pier, and an upper stop block is fixedly arranged at the bottom of the bridge beam at the pier position corresponding to the lower stop block device, the lower stop block device includes two lower stops and at least one cross stop block, the two lower stops are fixed on the pier top of the bridge pier with intervals along the transverse direction of the bridge, the cross stop block is connected between the two lower stops by bolts, and an accommodating cavity for accommodating the upper stop block is formed between the lower stop block and the cross stop block, and the upper stop block is embedded in the accommodating cavity formed by the lower stop block and the cross stop block.

[0006] In the utility model, the two lower blocks play a role in preventing the beam from falling horizontally, and the horizontal block plays a role in preventing the beam from falling vertically. The upper block cooperates with the lower block device to effectively prevent the beam from falling from the bridge pier in extreme earthquake conditions.

[0007] Furthermore, to ensure that the upper stopper is reliably fixed to the beam body, the upper stopper is a concrete stopper cast integrally with the beam body; or the upper stopper is a steel stopper, and the upper stopper is connected to the bottom of the bridge beam through an embedded part embedded in the bottom of the bridge beam.

[0008] Furthermore, to ensure that the lower stopper is reliably fixed to the pier, the lower stopper is a concrete stopper cast integrally with the pier; or the lower stopper is a steel stopper, and the lower stopper is connected to the top of the pier via an embedded part embedded in the top of the pier.

[0009] Further, for the convenience of installation and adjustment, the bolt hole on the connecting end of the cross block and the lower block is a strip bolt hole. By providing the strip bolt hole, the position of the cross block can be adjusted, which is convenient for installation and also convenient for adjusting the gap between the upper block and the cross block.

[0010] The beneficial effects of the utility model are as follows: the utility model has a simple structure, clear force, convenient installation and construction, and low construction difficulty. Through the cooperation of the upper block set at the bottom of the bridge beam and the lower block device set at the top of the pier, the beam body can be effectively prevented from falling from the pier under extreme earthquake conditions, and the anti-falling beam effect is good. Moreover, the upper and lower blocks are not easy to get stuck when they cooperate, and later maintenance is convenient. The anti-falling beam structure setting method in the utility model does not occupy the support maintenance space, which is convenient for the later maintenance of the support. Moreover, if the upper and lower blocks in the utility model are damaged in the later stage, it is convenient to replace or repair them, and it will not affect the force of the bridge beam body and the pier itself. The utility model can be applied to both newly built bridges and existing bridges, is low in cost, has high practicality, and has practical application and promotion significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a main schematic diagram of the utility model;

[0012] Figure 2 yes Figure 1 AA schematic diagram in;

[0013] Figure 3 yes Figure 1 BB schematic diagram in;

[0014] Figure 4 This is the front view of the cross block in the utility model;

[0015] Figure 5 yes Figure 4 A top view of

[0016] Figure 6 yes Figure 4 Side view of

[0017] Figure 7 It is a schematic diagram of the connection between the upper stopper and the beam body of the concrete structure;

[0018] Figure 8 yes Figure 7 Schematic diagram of CC in;

[0019] Fig. 9 It is a schematic diagram of the connection between the steel upper stopper and the beam body;

[0020] Fig.10 yes Fig. 9 DD schematic diagram in;

[0021] In the figure, 1 is the beam body, 2 is the pier, 3 is the support, 4 is the upper block, 5 is the lower block, 6 is the cross block, 7 is the bolt, 8, 9, 10, 11, 12, 13 are the steel plate parts of the cross block, 14 is the strip bolt hole, 15 is the embedded steel bar of the upper block in the beam body, 16 is the embedded steel bar, and 17 is the embedded steel plate. DETAILED DESCRIPTION

[0022] The present invention is further described below by way of non-limiting embodiments and in conjunction with the accompanying drawings:

[0023] As shown in the attached drawings, a bridge anti-seismic anti-fall beam structure includes a lower block device and an upper block 4. The lower block device is arranged on the top of the pier 2, and the lower block device is arranged between two supports 3 on the pier 2. The upper block 4 corresponds to the bottom of the bridge beam body 1 fixedly arranged at the pier position by the lower block device. The lower block device includes two lower blocks 5 and at least one cross block 6. The two lower blocks 5 are fixed on the top of the pier 2 at intervals along the transverse direction of the bridge. The cross block 6 is connected between the two lower blocks 5 by bolts 7. A receiving cavity for receiving the upper block 4 is formed between the lower block 5 and the cross block 6. The upper block 4 is embedded in the receiving cavity formed by the lower block 4 and the cross block 6. A certain gap should be left between the upper block 4 and the lower block and the cross block. The cross block 6 in the utility model is a steel structural member, which is a rectangular box-type structure welded by steel plates 8, 9, 10, 11, 12, and 13. Bolt holes are provided on the steel plates 8 and 10 at the connecting ends with the lower block 5. To facilitate the adjustment of the cross block 6, the bolt holes on the steel plates 8 and 10 are set as strip bolt holes 14 in this embodiment.

[0024] The size of the stopper, the gap between the upper and lower stoppers, and the number and diameter of the bolts in the utility model are specifically designed according to needs.

[0025] The lower block 5 in the utility model plays a role of preventing the beam from falling horizontally, and the cross block 6 plays a role of preventing the beam from falling vertically. The layout position of the cross block 6 is comprehensively considered according to the cross blocks 6 of adjacent piers, and can be set on both sides of the lower block or on one side of the lower block.

[0026] During construction, the lower block 5 is constructed simultaneously with the construction of the pier 2, and the upper block 4 is constructed simultaneously with the construction of the beam body 1. Finally, the cross block 6 is installed, and the bolts 7 are embedded in advance or installed after the reserved holes are reserved while the lower block 5 is constructed.

[0027] The upper stopper 4 in the present invention can be a concrete structure stopper or a steel stopper. Figure 7-Figure 8 As shown, when the upper stopper 4 is a concrete structure, the upper stopper 4 is cast as one with the beam body 1 when the concrete is cast, and the upper stopper 4 is firmly connected to the beam body 1 through the embedded steel bars 15 embedded in the beam body 1. Figure 9-10 As shown, when the upper stopper 4 is made of steel, the steel stopper can be firmly connected to the bottom of the bridge beam through an embedded steel plate 17 embedded in the bottom of the bridge beam, and the embedded steel plate 17 is firmly connected to the beam body 1 through embedded steel bars 16.

[0028] The lower stopper 5 in the utility model can be a concrete structure stopper or a steel stopper. When the lower stopper 5 adopts a concrete structure, the lower stopper 5 is cast as one with the bridge pier when the concrete is cast, and the connection between the lower stopper 5 of the concrete structure and the bridge pier is the same as the connection between the upper stopper 4 of the concrete structure and the beam body 1. When the lower stopper 5 adopts a steel stopper, the lower stopper 5 is fixedly connected to the top of the pier through an embedded part embedded in the top of the pier. The connection between the steel lower stopper 5 and the bridge pier is the same as the connection between the steel upper stopper 4 and the beam body 1.

[0029] The utility model has a simple structure, clear force, easy installation and construction, good effect of preventing beams from falling, and is easy to replace and repair if damaged in the later stage. It does not occupy the support maintenance space and does not affect the later support maintenance.

[0030] The other parts of this embodiment are all prior art and will not be described in detail here.

Claims

1. A bridge anti-seismic anti-falling beam structure, characterized in that: A lower stop block device is provided on the top of the pier, and the lower stop block device is provided between two supports on the pier, and an upper stop block is fixedly provided at the bottom of the bridge beam at the pier position corresponding to the lower stop block device, and the lower stop block device includes two lower stops and at least one cross stop block, the two lower stops are fixed on the top of the pier at intervals along the transverse direction of the bridge, the cross stop block is connected between the two lower stops by bolts, and an accommodating cavity for accommodating the upper stop block is formed between the lower stop block and the cross stop block, and the upper stop block is embedded in the accommodating cavity formed by the lower stop block and the cross stop block.

2. The bridge anti-seismic and anti-falling beam structure according to claim 1 is characterized in that: The upper stopper is a concrete stopper cast as one piece with the beam body; or the upper stopper is a steel stopper, and the upper stopper is connected to the bottom of the bridge beam through an embedded part embedded in the bottom of the bridge beam.

3. The anti-seismic and anti-falling beam structure of a bridge according to claim 1 or 2, characterized in that: The lower stopper is a concrete stopper integrally cast with the bridge pier; or the lower stopper is a steel stopper, and the lower stopper is connected to the top of the bridge pier through an embedded part embedded in the top of the bridge pier.

4. The anti-seismic and anti-falling beam structure of bridge according to claim 3 is characterized by: The bolt hole on the connecting end of the horizontal block and the lower block is a strip-shaped bolt hole.

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