Telescopic device for bridge widening
By combining the joint plate with the rotating sleeve and tensioning assembly, the problem of misalignment and gaps at the joint between new and old bridges is solved, thus achieving the continuity and safety of the bridge and adapting to bridge settlement and temperature displacement.
Patent Information
- Application Number
- CN202423073517.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-12
AI Technical Summary
The existing steel expansion joints at the widening points of bridges have misalignments and large gaps, which affect driving safety and are difficult to adapt to the inconsistent displacement caused by settlement and temperature differences between new and old bridges.
The structure adopts a combination of cross joint plate, rotating sleeve and tensioning assembly. The cross joint plate can slide and rotate along the longitudinal direction of the bridge. Combined with spherical support and compression support, it can adapt to the settlement and temperature displacement of new and old bridges and prevent warping and jamming.
It ensures the continuity of the road surface after the bridge is widened, avoids the safety hazards of vehicles bouncing and narrow-wheeled vehicles getting stuck, adapts to the displacement changes of the old and new bridges, and ensures driving safety.
Smart Images
Figure CN223675138U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to bridge expansion joint technology field, specifically, relate to a bridge expansion joint for bridge widening. BACKGROUND
[0002] With the rapid development of social economy, many highway bridges have been unable to meet the traffic demand, and the traffic capacity of the bridge needs to be improved. However, the new highway traffic line has a long construction period and high cost, and at present, the way of widening on the basis of existing roads and bridges is mostly adopted to improve the traffic capacity of the road and relieve the traffic pressure.
[0003] Due to the differences in construction time, materials and construction technology of new and old bridges, the expansion and displacement of new and old bridges and the foundation settlement are inconsistent, and the joint of new and old bridges may have large longitudinal and vertical misalignment, and sealing and waterproofing are required. The existing solution mostly uses ordinary steel expansion joint, which has problems such as misalignment and large steel gap, and is prone to safety hazards such as car jumping and narrow wheel car sinking, affecting the safety of bridge operation. SUMMARY
[0004] The utility model aims at providing a bridge expansion joint for bridge widening to solve the problem of misalignment and large steel gap of the steel expansion joint at the joint of new and old bridges in the prior art, which affects the safety of driving.
[0005] The utility model is implemented by the following technical solutions:
[0006] The utility model provides a bridge expansion joint for bridge widening, which comprises a cross-seam plate, the cross-seam plate is arranged between new and old bridges, one end of the cross-seam plate is connected to one side of the beam body through a tensioning assembly, the other end of the cross-seam plate is in sliding fit with the other side of the beam body, the cross-seam plate can move along the longitudinal direction of the beam body, and the end of the cross-seam plate is in rotary fit with the beam body.
[0007] Wherein, the sliding fit refers to a fitting mode, the cross-seam plate can slide longitudinally within a certain range relative to the beam body, and there are many ways to realize the sliding fit, including but not limited to realizing relative longitudinal sliding through a sliding groove. The rotary fit refers to a fitting mode, the cross-seam plate can rotate within a certain range relative to the beam body, including but not limited to realizing relative rotation through a rotating shaft. The tensioning assembly is used to prevent the cross-seam plate from being raised.
[0008] With the above structure, the cross-seam plate and the other side of the beam body can relatively slide and rotate, which can adapt to the relative displacement caused by the inconsistent settlement and temperature displacement of new and old bridges, including longitudinal displacement and vertical displacement.
[0009] As a preferred technical scheme,
[0010] The telescopic device further comprises a rotating sleeve fixedly installed on the other side beam body, the other end of the cross-seam plate is connected with a rotating shaft, the rotating shaft is installed in the rotating sleeve, the rotating shaft can rotate in the rotating sleeve, and the rotating shaft can slide in the rotating sleeve along the axial direction of the rotating sleeve.
[0011] The cross-seam plate can slide and rotate relative to the other side beam body through the rotating sleeve and the rotating.
[0012] As a preferred technical scheme,
[0013] The rotating sleeve adopts an arc-shaped slot structure, preferably a semicircular slot structure.
[0014] As a preferred technical scheme,
[0015] The length direction of the rotating sleeve is along the longitudinal bridge direction, and the longitudinal bridge direction refers to the driving direction.
[0016] As a preferred technical scheme,
[0017] The rotating sleeve is installed on the old bridge side beam body, and the tensioning assembly is installed on the new bridge side beam body.
[0018] As a preferred technical scheme,
[0019] The rotating shaft is fixedly connected with the cross-seam plate;
[0020] Or the rotating shaft and the cross-seam plate are an integral structure, and the rotating shaft serves as a rotating part of the cross-seam plate.
[0021] As a preferred technical scheme,
[0022] The rotating shaft is located at the bottom of the cross-seam plate, and the upper plane of the cross-seam plate is flush with the upper surfaces of the two side beam bodies when no vertical displacement occurs.
[0023] As a preferred technical scheme,
[0024] The telescopic device further comprises a sliding groove, a sliding piece is installed in the sliding groove, the sliding piece can slide along the axial direction of the sliding groove, and the sliding piece is hingedly connected with the cross-seam plate.
[0025] The hinged connection of the sliding piece and the cross-seam plate can also realize the rotation of the cross-seam plate relative to the other side beam body.
[0026] As a preferred technical scheme,
[0027] The rotating sleeve is fixedly installed on the rotating sleeve installation assembly, and the rotating sleeve installation assembly is fixedly connected with the anchor assembly embedded in the end of the beam body.
[0028] As a preferred technical solution:
[0029] The rotating sleeve is fixedly connected with the anchor assembly embedded in the end of the beam body.
[0030] As a preferred technical solution:
[0031] The tensioning assembly comprises an elastic support installed inside a support box, the support box is fixedly connected to the beam body, and the cross-seam plate is connected to the elastic support through the connecting piece extending into the support box.
[0032] When the two side bridges have differential settlement, the elastic support is elastically deformed during the settlement process, and the elastic support applies a downward tension to the cross-seam plate, thereby avoiding the cross-seam plate from being raised and ensuring driving safety.
[0033] As a preferred technical solution:
[0034] The support box is fixedly connected with the anchor assembly embedded in the end of the beam body.
[0035] As a preferred technical solution:
[0036] The elastic support adopts a compression support.
[0037] As a preferred technical solution:
[0038] The material of the compression support includes but is not limited to carbon steel, stainless steel, rubber, nylon, polytetrafluoroethylene, etc.
[0039] As a preferred technical solution:
[0040] A rotating support assembly is arranged between the support box and the cross-seam plate.
[0041] As a preferred technical solution:
[0042] The rotating support assembly comprises a spherical support and a spherical support seat, and the spherical support is connected to the spherical support seat through spherical surface rotation.
[0043] When the two side bridges have differential settlement, the spherical support rotates in the spherical support seat, which can avoid the position from being stuck.
[0044] As a preferred technical solution:
[0045] The material of the sliding surface of the spherical support and the spherical support seat includes but is not limited to nylon, carbon steel, stainless steel, rubber, polytetrafluoroethylene, etc.
[0046] As a preferred technical scheme:
[0047] The spherical bearing is fixedly connected to the top surface of the supporting box, and is in sliding connection with the cross-seam plate.
[0048] As a preferred technical scheme:
[0049] The bottom surface of the cross-seam plate and the bottom surface of the top plate of the supporting box are both provided with sliding plates, the spherical bearing and the sliding plate on the bottom surface of the cross-seam plate can slide relative to each other, and the elastic supporting member and the sliding plate on the bottom surface of the top plate of the supporting box can slide relative to each other.
[0050] As a preferred technical scheme:
[0051] The sliding plate can be made of stainless steel plate.
[0052] As a preferred technical scheme:
[0053] The top plate of the supporting box is provided with a waist-shaped hole, the length direction of the waist-shaped hole is along the transverse bridge direction, and one end of the connecting member sequentially passes through the cross-seam plate, the spherical bearing, the spherical bearing seat, the waist-shaped hole and the elastic supporting member.
[0054] When the bridge occurs transverse displacement, the connecting member can slide transversely in the waist-shaped hole, the spherical bearing slides transversely relative to the cross-seam plate, and the elastic supporting member slides transversely relative to the supporting box, so as to adapt to the transverse displacement of the bridge and the relative displacement of the new and old bridges in the transverse bridge direction, and adapt to the case that the transverse displacement of the new and old bridges leads to the change of the beam seam. Meanwhile, the waist-shaped hole provides a certain movement space for the connecting member, when the highway or bridge occurs differential settlement, the connecting member tilts with the cross-seam plate, and the waist-shaped hole can avoid the interference between the connecting member and the supporting box.
[0055] As a preferred technical scheme:
[0056] The connecting member can be a tension bolt.
[0057] As a preferred technical scheme:
[0058] The cross-seam plate is made of steel plate.
[0059] As a preferred technical scheme:
[0060] The cross-seam plate is provided with a counterbore, the head of the tension bolt is located in the counterbore, so as to ensure the surface of the cross-seam plate to be flat and facilitate the traffic; the rod of the tension bolt is provided with a spherical washer, and the spherical washer is located between the head of the tension bolt and the cross-seam plate.
[0061] As a preferred technical solution:
[0062] The bottom surface of the cross-seam plate is provided with a supporting upper stop bar, and the top surface of the supporting box is provided with a supporting lower stop bar, and the supporting upper stop bar abuts against the supporting lower stop bar.
[0063] When the highway or bridge has a longitudinal displacement, the stop bar transmits stress, and then drives the rotating shaft to slide in the rotating shaft sleeve.
[0064] As a preferred technical solution:
[0065] The bottom surface of the cross-seam plate is provided with a group of supporting upper stop bars, and the top surface of the supporting box is provided with a group of supporting lower stop bars, each supporting upper stop bar corresponds to the position of a supporting lower stop bar, the supporting upper stop bar is located on the inner side of the supporting lower stop bar, and the outer side of the supporting upper stop bar abuts against the inner side of the corresponding supporting lower stop bar.
[0066] In summary, due to the adoption of the above technical scheme, the beneficial effects of the utility model are:
[0067] 1、The telescopic device can connect new and old bridges, and realize the continuity of the road surface after the bridge is widened.
[0068] 2、The cross-seam plate can slide axially (longitudinally) relative to the beam body, and adapt to the situation that the longitudinal displacements of the new and old bridges are inconsistent.
[0069] 3、The cross-seam plate can rotate relative to the beam body, adapt to the situation that the settlements of the new and old bridges are inconsistent, avoid the occurrence of abutment deviation at the joint of the new and old bridges, avoid the occurrence of car jumping, and ensure the safety of driving; meanwhile, the rotation amount is released through cooperation of the spherical support and the spherical support seat, and the cross-seam plate is prevented from being stuck.
[0070] 4、The cross-seam plate, the spherical support, the transverse sliding between the supporting and the supporting box and the design of the waist-shaped hole can adapt to the situation that the transverse displacement between the new and old bridges leads to the change of the beam joint.
[0071] 5、The elastic deformation of the pressing support can adapt to the situation that the positions of the new and old bridges change, and the cross-seam plate is prevented from being raised.
[0072] 6、The cross-seam plate is a whole plate, the gap between the cross-seam plate and the beam bodies on both sides is small, and the safety hidden danger such as the trapping of a narrow-wheel vehicle is effectively eliminated. BRIEF DESCRIPTION OF DRAWINGS
[0073] Figure 1 It is a top view of the telescopic device for bridge widening.
[0074] Figure 2 The main view of the expansion device for bridge widening.
[0075] Figure 3 For Figure 1 The cross-sectional view in the A-A direction (no displacement occurs).
[0076] Figure 4 For Figure 3 The enlarged view at B.
[0077] Figure 5 The cross-sectional view of the expansion device for bridge widening after vertical displacement.
[0078] Figure 6 For Figure 1 The cross-sectional view in the C-C direction.
[0079] Figure 7 For Figure 6 The enlarged view at D.
[0080] Figure: 1 shaft sleeve installation assembly, 2 rotating shaft sleeve, 3 cover plate rotating shaft, 4 cross-seam steel plate, 5 stainless steel plate, 6 tension bolt, 7 spherical washer, 8 spherical support, 9 spherical support seat, 10 support box assembly, 10-1 waist-shaped hole, 11 stainless steel sliding plate, 12 compression support, 13 waterproof assembly, 14 upper support stop bar, 15 lower support stop bar, 16 old bridge body, 17 new bridge body. DETAILED DESCRIPTION
[0081] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0082] Embodiment 1
[0083] As Figures 1-7 shown, the embodiment provides an expansion device for bridge widening, which is installed between an old bridge and a new bridge, so that the new and old bridge pavements are kept continuous. The two ends of the expansion device are respectively fixed to the new and old bridges through anchoring assemblies, Figure 3 The cross-sectional view of the expansion device in the transverse direction of the bridge is shown. Figure 3 And Figure 5 In the figure, the number 16 is an old bridge body, and the number 17 is a new bridge body.
[0084] In the embodiment, the telescopic device comprises a rotating sleeve mounting assembly 1 fixedly mounted on the old bridge body, specifically, the rotating sleeve mounting assembly 1 is fixedly connected with an anchor assembly pre-buried at the end of the old bridge. The rotating sleeve mounting assembly 1 is fixedly connected with a rotating sleeve 2, and one side of the rotating sleeve 2 is also connected with the anchor assembly pre-buried at the end of the old bridge. The rotating sleeve 2 is a semicircular groove structure, and the length direction of the rotating sleeve 2 is along the longitudinal bridge direction, which refers to the driving direction.
[0085] A rotating shaft 3 is mounted in the rotating sleeve 2, which can rotate in the rotating sleeve 2 and can slide along the axial direction (i.e. the length direction) of the rotating sleeve 2 in the rotating sleeve 2.
[0086] One end of the rotating shaft 3 is fixedly connected with a cross-seam steel plate 4 arranged across the gap between the old bridge and the new bridge, and the other end of the cross-seam steel plate 4 is connected to a compression support 12 through a tension bolt 6. Specifically, the tension bolt 6 is bolted and fixed with the bottom plate of the compression support 12.
[0087] The compression support 12 is mounted in a support box 10 fixedly connected with the new bridge body, specifically, the support box 10 is fixedly connected with an anchor assembly pre-buried at the end of the new bridge.
[0088] A spherical support seat 9 is mounted on the top surface of the support box 10, and a spherical support 8 is mounted between the cross-seam steel plate 4 and the spherical support seat 9, and the spherical support 8 is connected with the spherical support seat 9 through a spherical surface.
[0089] A waist-shaped hole 10-1 is formed in the top plate of the support box 10, and the length direction of the waist-shaped hole 10-1 is along the transverse bridge direction. One end of the tension bolt 6 passes through the cross-seam steel plate 4, the spherical support 8, the spherical support seat 9, the waist-shaped hole 10-1 and the compression support 12 in sequence. A counterbore is formed in the cross-seam steel plate 4, and the head of the tension bolt 6 is located in the counterbore, so as to ensure the surface of the cross-seam steel plate 4 to be flat, facilitating the traffic. A spherical surface washer 7 is sleeved on the rod of the tension bolt 6, and the spherical surface washer 7 is located between the head of the tension bolt 6 and the cross-seam steel plate 4.
[0090] A sliding surface is formed on the top surface of the spherical support 8, and forms a sliding pair with the contact surface of the cross-seam steel plate 4, and the spherical support 8 and the cross-seam steel plate 4 can slide relative to each other.
[0091] In the embodiment, the bottom surface of the cross-bridge steel plate 4 is fixedly installed with a stainless steel plate 5, the bottom surface of the top plate of the supporting box is fixedly installed with a stainless steel sliding plate 11, the top surface of the spherical supporting 8 can slide relative to the stainless steel plate 5, and the top surface of the compression supporting 12 can slide relative to the stainless steel sliding plate 11.
[0092] In the embodiment, the rotating shaft sleeve 2 is welded with the old bridge side anchoring assembly, the rotating shaft 3 is welded with the cross-bridge steel plate 3, and the rotating shaft 3 is welded on the bottom surface of the cross-bridge steel plate 3. When no vertical displacement occurs, the upper surface of the cross-bridge steel plate 4 is flush with the upper surfaces of the two side beam bodies. In order to facilitate the rotation of the cross-bridge steel plate 4, gaps are left between the two ends of the cross-bridge steel plate 4 and the two side beam bodies. The bottom of the spherical supporting seat 9 is fixedly connected with the top surface of the supporting box 10.
[0093] With the above structure, since one end of the cross-bridge steel plate 4 is fixedly connected with the rotating shaft 3, the cross-bridge steel plate 4 can move along the longitudinal bridge, and the cross-bridge steel plate 4 can also rotate around the rotating shaft 3 as the rotation axis. Therefore, the cross-bridge steel plate 4 and the old bridge side can slide and rotate relative to each other, so as to adapt to the relative displacement caused by the inconsistent settlement and temperature displacement of the new and old bridge beams.
[0094] Specifically, the cross-bridge steel plate 4 can longitudinally slide relative to the old bridge. When the longitudinal displacement of the new and old bridge beams is inconsistent, the telescopic device can adapt to the longitudinal misalignment between the new and old bridge beams. The cross-bridge steel plate 4 can also rotate relative to the old bridge. When the highway or bridge has differential settlement, the new bridge side supports the cross-bridge steel plate 4 through the spherical supporting 8, and the spherical supporting 8 rotates in the spherical supporting seat 9, so as to avoid being stuck at this position. The cross-bridge steel plate 4 is constrained by the elastic deformation of the compression supporting 12, so as to prevent the cross-bridge steel plate 4 from bouncing and affecting the driving safety. Therefore, the telescopic device can adapt to the inconsistent settlement of the new and old bridge beams, and avoid the misalignment of the joint between the new and old bridge beams.
[0095] Preventing the cross-bridge steel plate 4 from bouncing specifically refers to that, as shown in Figure 5 When the new bridge settles relative to the old bridge, the compression supporting 12 elastically deforms during the settlement process, and the compression supporting 12 applies a downward pulling force to the cross-bridge steel plate 4, so as to avoid the cross-bridge steel plate 4 from being raised.
[0096] Since the tension bolt 6 passes through the waist-shaped hole 10-1, and the length direction of the waist-shaped hole 10-1 is along the transverse bridge direction, when the highway or bridge has transverse displacement, the tension bolt 6 can slide in the waist-shaped hole 10-1 in the transverse direction, at the same time, the top surface of the spherical bearing 8 has relative sliding with the stainless steel plate 5, and the top surface of the compression bearing 12 has relative sliding with the stainless steel sliding plate 11, so as to adapt to the transverse displacement of the highway or bridge, and the relative displacement of the new and old bridges in the transverse bridge direction, and the beam joint change caused by the transverse displacement between the new and old bridges. At the same time, the waist-shaped hole 10-1 provides a certain space for the tension bolt 6 to move, when the highway or bridge has differential settlement, the tension bolt 6 tilts with the cross-joint steel plate 4, and the waist-shaped hole 10-1 can avoid the interference between the tension bolt 6 and the bearing box 10.
[0097] Further, as shown in Figure 6 and Figure 7 the bottom surface of the cross-joint steel plate 4 is fixedly installed with a group of supporting upper stoppers 14, and the top surface of the bearing box 10 is fixedly installed with a group of supporting lower stoppers 15, each of the supporting upper stoppers 14 corresponds to the position of one of the supporting lower stoppers 15, the supporting upper stopper 14 is located on the inner side of the supporting lower stopper 15, and the outer side of the supporting upper stopper 14 abuts against the inner side of the corresponding supporting lower stopper 15, when the highway or bridge has longitudinal displacement, the stopper transmits stress, and then drives the rotating shaft 3 to slide in the rotating shaft sleeve 2.
[0098] Further, a waterproof assembly 13 is also installed between the old bridge and the new bridge, and the two ends of the waterproof assembly 13 are fixedly connected to the end portions of the old bridge and the new bridge respectively.
[0099] In the embodiment, the material of the compression bearing 12 includes but is not limited to carbon steel, stainless steel, rubber, nylon, polytetrafluoroethylene, etc., and the material of the sliding surface of the spherical bearing 8 and the spherical bearing seat 9 includes but is not limited to nylon, carbon steel, stainless steel, rubber, polytetrafluoroethylene, etc.
[0100] Embodiment 2
[0101] The difference between the embodiment and the embodiment 1 is that:
[0102] The rotation of the cross-joint steel plate 4 can not be limited to the mode of realizing the rotation by matching the rotating sleeve 2 with the rotating shaft 3, for example, the rotating sleeve 2 is replaced by a sliding groove, a sliding piece is installed in the sliding groove, the sliding piece can slide along the axial direction of the sliding groove, and the sliding piece is hinged with the cross-joint steel plate 4. The above structure can also realize the longitudinal sliding of the cross-joint steel plate 4, and when the two side bridges have differential settlement, the cross-joint steel plate 4 can also rotate relative to the old bridge side beam body.
[0103] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A bridge widening telescopic device, characterized in that: comprising a cross-seam plate, the cross-seam plate is arranged between the new and old bridge, one end of the cross-seam plate is connected to one side of the beam body through a tensioning assembly; the other end of the cross-seam plate is in sliding fit with the other side of the beam body, the cross-seam plate can move along the longitudinal direction of the bridge relative to the side of the beam body, and the end of the cross-seam plate is in rotary fit with the side of the beam body, the cross-seam plate can rotate relative to the side of the beam body.
2. The bridge widening telescopic device according to claim 1, characterized in that: further comprising a rotary sleeve, the rotary sleeve is fixedly installed on the other side of the beam body, the other end of the cross-seam plate is connected with a rotating shaft, the rotating shaft is installed in the rotary sleeve, the rotating shaft can rotate in the rotary sleeve, and the rotating shaft can slide in the rotary sleeve along the axial direction of the rotary sleeve.
3. The bridge widening telescopic device according to claim 2, characterized in that: the rotating shaft is fixedly connected with the cross-seam plate; or the rotating shaft and the cross-seam plate are an integral structure, and the rotating shaft serves as the rotating part of the cross-seam plate.
4. The bridge widening telescopic device according to claim 1, characterized in that: further comprising a sliding groove, a sliding piece is installed in the sliding groove, the sliding piece can slide along the axial direction of the sliding groove, and the sliding piece is hinged with the cross-seam plate.
5. The bridge widening telescopic device according to claim 1, characterized in that: the tensioning assembly comprises an elastic support, the elastic support is installed inside a support box, the support box is fixedly connected to the beam body, and the cross-seam plate is connected with the elastic support through a connecting piece inserted into the support box.
6. The bridge widening telescopic device according to claim 5, characterized in that: a rotary support assembly is arranged between the support box and the cross-seam plate.
7. The bridge widening telescopic device according to claim 6, characterized in that: the rotary support assembly comprises a spherical support and a spherical support seat, and the spherical support is connected with the spherical support seat through spherical surface rotation.
8. The bridge widening telescopic device according to claim 7, characterized in that: the spherical support seat is fixedly connected to the top surface of the support box, and the spherical support is in sliding connection with the cross-seam plate.
9. The bridge widening telescopic device according to claim 7, characterized in that: a waist-shaped hole is formed in the top plate of the support box, the length direction of the waist-shaped hole is along the transverse direction of the bridge, and one end of the connecting piece is sequentially arranged through the cross-seam plate, the spherical support, the spherical support seat, the waist-shaped hole, and the elastic support.
10. The bridge widening telescopic device according to claim 5, characterized in that: a support upper blocking strip is installed on the bottom surface of the cross-seam plate, a support lower blocking strip is installed on the top surface of the support box, and the support upper blocking strip is in abutment with the support lower blocking strip.