Limiting device for preventing deviation of piers of large-longitudinal-slope high-pier bridge
By installing limiting devices, including limiting components, stops, springs, and connectors, on the cap beams of precast continuous beam bridges, the problem of longitudinal displacement of flexible high-pier bridge columns was solved, achieving both bridge stability and ease of installation.
Patent Information
- Application Number
- CN202422886071.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2034-11-26
AI Technical Summary
In existing technologies, the flexible high piers of prefabricated continuous beam bridges are easily affected by factors such as non-horizontal contact of the bottom of the main beam, temperature effects, and vehicle braking forces, resulting in longitudinal displacement. The lack of clear limiting devices leads to bridge defects and high-cost reinforcement difficulties, resulting in serious economic losses.
Design a limiting device including a limiting component, a stop block, stiffening ribs, a spring, and a connecting component. The limiting component is fixed to the cap beam. The stop block has a spring and a free steel plate on its inner side, which, together with the transverse diaphragm, prevents the pier from excessively deviating. The spring provides cushioning. The limiting component is fixed to the cap beam by tie rods and bolts. The T-shaped structure ensures stability.
It effectively prevents bridge piers from deviating beyond the limit, reduces bridge defects, lowers construction costs, improves bridge load-bearing capacity, and ensures the stability and ease of installation of the limit device.
Smart Images
Figure CN223805404U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to bridge engineering technical field, concretely relates to a kind of limit stop device for preventing large longitudinal slope high pier bridge pier deflection. BACKGROUND
[0002] Prefabricated assembly type continuous beam bridge is widely used in highway, and pier column is mostly set as flexible high pier, however, the longitudinal stiffness of pier column of high pier bridge is lower, when the bottom of main beam is not horizontal with support, due to bias, temperature effect and automobile braking force effect, it is easy to cause unbalanced horizontal thrust at pier top, so that pier column generates longitudinal deflection in uphill direction.
[0003] Domestic early design assembly type continuous beam bridge does not clearly define longitudinal limit stop device of bridge flexible high pier, only provide suggestion that longitudinal limit stop device needs to be installed after bridge construction is completed, but because of lacking clear design drawing, combined with that there is no ready-made limit stop device in market to purchase, so longitudinal limit stop device is not installed after bridge construction is completed, under long-term accumulation of various factors, if control measures are not taken, high pier pier top deflection overrun, relative sliding of upper and lower steel plates of sliding plate support is too large and other phenomena are easy to occur, which leads to a series of diseases such as support damage, expansion joint damage, increase of disadvantageous stress at bottom of pier column and decrease of bridge bearing capacity. SUMMARY
[0004] The utility model aims at the problems existing in prior art, a kind of limit stop device for preventing large longitudinal slope high pier bridge pier deflection.
[0005] To achieve the above object, the technical scheme adopted by the utility model is as follows: a kind of limit stop device for preventing large longitudinal slope high pier bridge pier deflection, including limit stop, baffle, stiffener, spring, free steel plate and connecting piece, the limit stop is fixedly arranged on bent cap by connecting piece, the limit stop is equipped with baffle, the outer side of the baffle is equipped with a plurality of stiffeners, the inner side of the baffle is equipped with a plurality of springs and a free steel plate, the free steel plate and transverse bulkhead are reserved with a certain gap, the excessive deflection of bridge pier is prevented by the mutual cooperation of limit stop device and transverse bulkhead.
[0006] On the basis of the above technical scheme, preferably, the limit stop device is fixedly arranged on the bent cap, the bent cap is fixedly arranged on the bridge pier, the main beam is arranged on the bent cap by wedge block, support and cushion stone, and expansion joint is left between the main beam.
[0007] On the basis of the above technical scheme, preferably, the limit stop device includes limit stop, the limit stop includes limit stop and baffle fixed on limit stop, and the limit stop is arranged on the bent cap by the cooperation of limit stop and connecting piece.
[0008] On the basis of the above technical scheme, preferably, the stop block is matched with a plurality of springs and a free steel plate on the inner side, the two ends of the spring are tightly ground and welded between the free steel plate and the stop block, and the spring can ensure soft collision when the free steel plate contacts the transverse plate to deform and consume energy, thereby playing a limiting and buffering role.
[0009] On the basis of the above technical scheme, preferably, the stop block and the limiting piece are matched with a plurality of triangular stiffening ribs on the outer side, and the stiffening ribs are fixed on the stop block and the limiting piece by welding.
[0010] On the basis of the above technical scheme, preferably, the limiting pieces are arranged on both sides of the bent cap in the longitudinal direction, the limiting pieces are T-shaped structures, and the limiting pieces are closely attached to the straight edges on both sides of the bent cap to ensure that no looseness occurs under stress.
[0011] On the basis of the above technical scheme, preferably, the connecting piece includes a plurality of pull rods and bolts fixed on both ends of the pull rods, the limiting pieces are reserved with holes, the pull rods are sequentially inserted through the holes on the limiting pieces at both ends of the bent cap, and the limiting pieces are fixed on the bent cap by cooperating with the bolts.
[0012] On the basis of the above technical scheme, preferably, the stop block and the limiting piece are welded by a steel plate with a certain thickness, and the stop block is arranged on the limiting piece by welding.
[0013] On the basis of the above technical scheme, preferably, the limiting piece, the stop block and the connecting piece are made of high-strength steel.
[0014] Compared with the prior art, the beneficial effects of the utility model are:
[0015] (1) The free steel plate on the limiting device can cooperate with the transverse plate of the main beam to prevent the bridge pier from being excessively deviated, and if the bridge pier is excessively deviated downward or upward, the transverse plate of the main beam and the free steel plate will contact and limit. Meanwhile, the cooperation of the upward stop block and the downward stop block can prevent the bridge beam from falling, especially during an earthquake, the main beam can be prevented from falling. In addition, when the bridge pier is excessively deviated, the spring in the stop block can effectively reduce the impact of the direct contact between the limiting device and the transverse plate.
[0016] (2) The limiting pieces on both sides of the bent cap are T-shaped structures, and the limiting pieces are completely clamped on the bent cap by cooperating with the pull rods and the bolts. This structure is simple and reliable, easy to install, and can determine the installation position and specific size of the limiting device according to the actual bridge demand, so as to ensure that the limiting device and the bent cap become a whole and ensure the stability of the limiting device. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 The utility model discloses a kind of limiting devices for preventing pier deviation of high pier bridge on large longitudinal slope, and the limiting device includes limiting piece 14, stopper 11, spring 10, free steel plate 9, connecting piece (tension rod 12 and bolt 13), limiting piece 14 is fixedly arranged on cap beam 6 by tension rod 12 and bolt 13 cooperation, and limiting piece is equipped with stopper 11, the outside of stopper is equipped with a plurality of stiffening ribs 15, the inside of stopper is equipped with a plurality of springs 10 and a free steel plate 9, free steel plate 9 is reserved with a certain gap between free steel plate 9 and cross diaphragm 2, and the excessive deviation of pier 7 is prevented by the mutual cooperation of limiting device and cross diaphragm 2.
[0018] Figure 2 The utility model discloses a kind of limiting devices for preventing pier deviation of high pier bridge on large longitudinal slope, and the limiting device includes limiting piece 14, stopper 11, spring 10, free steel plate 9, connecting piece (tension rod 12 and bolt 13), limiting piece 14 is fixedly arranged on cap beam 6 by tension rod 12 and bolt 13 cooperation, and limiting piece is equipped with stopper 11, the outside of stopper is equipped with a plurality of stiffening ribs 15, the inside of stopper is equipped with a plurality of springs 10 and a free steel plate 9, free steel plate 9 is reserved with a certain gap between free steel plate 9 and cross diaphragm 2, and the excessive deviation of pier 7 is prevented by the mutual cooperation of limiting device and cross diaphragm 2.
[0019] Figure 3 The utility model discloses a kind of limiting devices for preventing pier deviation of high pier bridge on large longitudinal slope, and the limiting device includes limiting piece 14, stopper 11, spring 10, free steel plate 9, connecting piece (tension rod 12 and bolt 13), limiting piece 14 is fixedly arranged on cap beam 6 by tension rod 12 and bolt 13 cooperation, and limiting piece is equipped with stopper 11, the outside of stopper is equipped with a plurality of stiffening ribs 15, the inside of stopper is equipped with a plurality of springs 10 and a free steel plate 9, free steel plate 9 is reserved with a certain gap between free steel plate 9 and cross diaphragm 2, and the excessive deviation of pier 7 is prevented by the mutual cooperation of limiting device and cross diaphragm 2.
[0020] Figure 4 The utility model discloses a kind of limiting devices for preventing pier deviation of high pier bridge on large longitudinal slope, and the limiting device includes limiting piece 14, stopper 11, spring 10, free steel plate 9, connecting piece (tension rod 12 and bolt 13), limiting piece 14 is fixedly arranged on cap beam 6 by tension rod 12 and bolt 13 cooperation, and limiting piece is equipped with stopper 11, the outside of stopper is equipped with a plurality of stiffening ribs 15, the inside of stopper is equipped with a plurality of springs 10 and a free steel plate 9, free steel plate 9 is reserved with a certain gap between free steel plate 9 and cross diaphragm 2, and the excessive deviation of pier 7 is prevented by the mutual cooperation of limiting device and cross diaphragm 2.
[0021] In the drawing: main beam 1, cross diaphragm 2, wedge block 3, support 4, cushion stone 5, cap beam 6, pier 7, expansion joint 8, free steel plate 9, spring 10, stopper 11, pull rod 12, bolt 13, limiting piece 14, stiffening rib 15. Specific implementation
[0022] The embodiments of the utility model are described clearly and completely in combination with drawings, obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments.
[0023] As Figures 1-4 The utility model discloses a kind of limiting devices for preventing pier deviation of high pier bridge on large longitudinal slope, and the limiting device includes limiting piece 14, stopper 11, spring 10, free steel plate 9, connecting piece (tension rod 12 and bolt 13), limiting piece 14 is fixedly arranged on cap beam 6 by tension rod 12 and bolt 13 cooperation, and limiting piece is equipped with stopper 11, the outside of stopper is equipped with a plurality of stiffening ribs 15, the inside of stopper is equipped with a plurality of springs 10 and a free steel plate 9, free steel plate 9 is reserved with a certain gap between free steel plate 9 and cross diaphragm 2, and the excessive deviation of pier 7 is prevented by the mutual cooperation of limiting device and cross diaphragm 2.
[0024] Limiting device can be installed on high pier bridge on large longitudinal slope, and high pier bridge on large longitudinal slope includes pier 7, cap beam 6 and main beam 1, cap beam 6 is fixedly arranged above pier 7, main beam 1 is erected on cap beam 6 by wedge block 3, support 4 and cushion stone 5, two main beams are left with expansion joint, expansion joint position is equipped with expansion joint device 8, and expansion joint device 8 can select different specifications according to actual situation on site.
[0025] The spring 10 is arranged vertically and transversely between the stop block 11 and the free steel plate 9, and the spring 10 is not unique in selection; in addition, the spring 10 with greater rigidity is selected as much as possible to ensure that the deformation amount of the spring 10 is small in the stress state, and ensure that the free steel plate 9 and the transverse plate 2 are in soft collision when contacting, so that the spring 10 is deformed and energy is consumed, thereby playing a limiting and buffering effect and avoiding causing damage to the bridge structure.
[0026] The outer side of the stop block 11 and the outer side of the limiting piece 14 are both matched with a plurality of stiffening ribs 15 in the shape of a triangle, so as to ensure that the pier top is supported by the stiffening ribs 15 when a larger offset occurs, improve the safety of the limiting device when stressed, and the stiffening ribs 15 are fixed on the stop block 11 and the limiting piece 14 by welding, and the specific number and thickness of the stiffening ribs 15 need to be set according to the actual bridge stress.
[0027] A certain movement distance should be left between the free steel plate 9 and the transverse plate 2 to ensure that the pier top can normally offset within a safe range without being constrained, and the spacing between the free steel plate 9 and the transverse plate 2 should be set according to the actual situation of the bridge, and can be set by referring to the “Highway Engineering Quality Inspection and Evaluation Standard” (JTGF80 / 1-2017).
[0028] The limiting piece 14 on both sides of the bent cap 6 is reserved with a hole, the pull rod 12 penetrates the holes on the limiting pieces 14 at both ends of the bent cap 6 in sequence, the both ends of the pull rod 12 are provided with threads, and the limiting piece 14 is fixed on the bent cap 6 by the cooperation of the pull rod 12 and the bolts 13 fixed at both ends of the pull rod.
[0029] The limiting device is generally arranged between the transverse plates 2 of two adjacent T-beams and arranged in the transverse direction of the bent cap 6, and the installation number of the limiting device is determined according to the actual situation of the bridge.
[0030] The stop block 11 and the limiting piece 14 are welded by a certain thickness of steel plate, and the stop block 11 is arranged on the limiting piece 14 by welding, and the materials of the limiting piece 14, the stop block 11, the stiffening rib 15 and the free steel plate 9 are high-strength steel, and the specific steel type of the high-strength steel can be selected according to the actual situation of the bridge.
[0031] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A limiting device for preventing the deviation of a pier of a high pier bridge on a steep slope, comprising a pier and a limiting device, characterized in that, The limiting device comprises a main beam, a cap beam, a limiting piece, a stop block, a stiffening rib, a spring, a free steel plate and a connecting piece, the limiting piece is fixedly arranged on the cap beam through the connecting piece, the limiting piece is fixedly connected with the stop block, the outer side of the stop block is provided with a plurality of stiffening ribs, the inner side of the stop block is provided with a plurality of springs and a free steel plate, a certain gap is reserved between the free steel plate and the transverse partition plate, and the excessive deflection of the pier is prevented through the cooperation of the limiting device and the transverse partition plate.
2. The limiting device for preventing pier deflection of a high pier bridge on a steep slope according to claim 1, characterized in that, The limiting device is fixedly arranged on the cap beam, the cap beam is fixedly arranged above the pier, the main beam is arranged on the cap beam through a wedge-shaped block, a support and a cushion stone, and expansion joints are reserved between the main beams.
3. The limiting device for preventing pier deflection of high pier bridge on long and steep slope according to claim 1, characterized in that, The inner side of the stop block is matched with a plurality of springs and a free steel plate, the two ends of the spring are tightly ground and flattened, and the spring is welded between the free steel plate and the stop block, the spring can ensure that the free steel plate and the transverse partition plate are in soft collision when being in contact, so that the spring is deformed and energy is consumed, thereby playing a limiting and buffering role.
4. The limiting device for preventing pier deflection of high pier bridge on long and steep slope according to claim 1, characterized in that, The outer side of the stop block and the outer side of the limiting piece are matched with a plurality of stiffening ribs in the shape of a triangle, the stiffening ribs are fixedly arranged on the stop block and the limiting piece respectively by welding.
5. The limiting device for preventing pier deflection of high pier bridge on long and steep slope according to claim 1, characterized in that, The limiting piece is arranged on both sides of the cap beam in the longitudinal direction, the limiting piece is in a T-shaped structure, the limiting piece is closely attached to the two straight sides of the cap beam, and the limiting piece can ensure that no looseness occurs when being stressed.
6. The limiting device for preventing pier deflection of high pier bridge on long and steep slope according to claim 1, characterized in that, The connecting piece comprises a plurality of pull rods and bolts fixed at the two ends of the pull rods, the limiting piece is provided with a hole, the pull rod penetrates the hole of the limiting piece at the two ends of the cap beam in sequence, and the limiting piece is fixedly arranged on the cap beam by cooperating with the bolts.
7. The limiting device for preventing pier deflection of high pier bridge on long and steep slope according to claim 1, characterized in that, The stop block and the limiting piece are welded by a steel plate with a certain thickness, and the stop block is arranged on the limiting piece by welding.
8. The limiting device for preventing pier deflection of a high pier bridge on a steep slope according to claim 1, characterized in that, The material of the limiting piece, the stop block and the connecting piece is high-strength steel.