Bridge separation type large-displacement seamless telescopic structure, bridge and construction method of bridge

Abstract

The invention relates to the technical field of bridge expansion joint engineering, in particular to a bridge separation type large-displacement seamless expansion joint structure, a bridge and a construction method thereof.The bridge separation type large-displacement seamless expansion joint structure comprises a joint crossing steel plate arranged on an expansion joint and covering the expansion joint; the two anchoring structures are located at the two ends of the joint-crossing steel plate correspondingly, at least one distance is formed between the two anchoring structures and the joint-crossing steel plate, and the two anchoring structures and the bridge structures at the two ends of the expansion joint are anchored; the two ends of the elastic structure are fixedly connected with the two anchoring structures respectively; and the super-tough resin is used for filling the gap-crossing steel plate, the anchoring structure and the elastic structure. Compared with a traditional modular large-displacement expansion joint, noise can be reduced, potential safety hazards existing in rigid materials of the traditional expansion joint are avoided, the driving comfort level is high, and the driving safety is excellent.

Description

Technical Field

[0001] The invention relates to the technical field of bridge expansion joint engineering, and in particular to a bridge separated large displacement seamless expansion structure, a bridge and a construction method thereof. Background Art

[0002] Expansion joints are important structures of bridges. They are not only related to the structural safety of bridges, but can also effectively buffer the extrusion or tensile force between structures caused by temperature deformation of bridges or vibration of bridge deck loads. They are also an important guarantee for road driving safety. Existing large deformation expansion joints are mainly modular and comb plate expansion joint technologies. They use rigid materials to make components, which have large impact noise with tires and poor driving comfort. Moreover, with the increase of service life, steel components such as comb plates will experience fatigue, wear and even bending damage, affecting driving safety.

[0003] Resin seamless expansion joint technology is widely used in various bridges due to its seamless surface and excellent noise reduction effects. However, it is limited by the tensile and compression properties of the vertical material itself. Resin seamless expansion joint technology is only suitable for expansion joints of bridges with a designed deformation of ≤160mm and cannot be used in bridges with large or even super-large displacements.

[0004] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0005] The present invention provides a bridge separated large displacement seamless telescopic structure, a bridge and a construction method thereof, thereby effectively solving the problems in the background technology.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: a bridge separated large displacement seamless telescopic structure, comprising:

[0007] A cross-seam steel plate, wherein the cross-seam steel plate is arranged on the expansion joint and covers the expansion joint;

[0008] Two anchoring structures, the two anchoring structures are respectively located at two ends of the spanning steel plate, and there is at least a spacing between the two anchoring structures and the spanning steel plate, and the two anchoring structures are anchored to the bridge structure at both ends of the expansion joint;

[0009] An elastic structure, two ends of which are respectively fixedly connected to the two anchoring structures;

[0010] Super-tough resin, the super-tough resin is used to fill the gaps between the seam-spanning steel plates, the anchoring structures and the elastic structures.

[0011] Furthermore, the anchoring structure comprises:

[0012] An outer angle steel, the outer angle steel comprising a vertical end and a horizontal section, the vertical end and the horizontal section are respectively anchored to the bridge structure, and the horizontal sections of the two outer angle steels are arranged close to each other;

[0013] An inner angle steel is fixedly arranged on the horizontal section, and two ends of the elastic structure are respectively fixedly connected to the inner angle steel.

[0014] Furthermore, the anchoring structure further comprises:

[0015] Vertical anchor bolts, the vertical anchor bolts respectively connect the horizontal section of the outer angle steel and the inner angle steel, and anchor the outer angle steel longitudinally;

[0016] A horizontal anchor bolt is connected to the vertical end of the outer angle steel to transversely anchor the outer angle steel.

[0017] Furthermore, the vertical anchor bolt comprises a straight rod threaded section at the top of the horizontal section, and a straight rod non-threaded shear nail at the bottom of the horizontal section.

[0018] Furthermore, the elastic structure comprises:

[0019] A threaded steel pipe, wherein the threaded steel pipe is arranged on the anchoring structure;

[0020] A rigid sleeve, wherein the rigid sleeve is partially sleeved on the threaded steel pipe and is located at both ends of the threaded steel pipe, and the rigid sleeve and both ends of the threaded steel pipe are arranged on the anchoring structure;

[0021] A compression spring is disposed in the rigid sleeve and is in a compressed state.

[0022] Furthermore, slope structures are provided at both ends of the cross-seam steel plate.

[0023] The present invention also includes a separated large displacement seamless telescopic bridge, comprising:

[0024] The cap beam, bearing anti-vibration block, bearing, box beam, portal reinforcement, leveling layer, asphalt concrete surface layer, high-toughness cement concrete and the seamless telescopic structure as mentioned above are constructed in sequence from bottom to top;

[0025] The cap beam is in an inverted T shape, with three rows of cap beam gate-shaped bars arranged on the top, the cap beam gate-shaped bars are arranged symmetrically, and the width of the middle gate-shaped bar is half of that of the two sides;

[0026] The supports are located at the upper part of the two wings of the inverted T-shaped cap beam and are arranged symmetrically to provide the box beam with the required deformation for vertical deformation. There are support anti-vibration blocks on both sides of the supports to prevent the support from shifting and reduce vibration.

[0027] The box beam is located above the support and is arranged symmetrically. The top surface height is consistent with the cap beam height, and together with the cap beam, it forms a first expansion joint and a second expansion joint. A single row of gate-shaped ribs are arranged on the top of each side, and the box beam gate-shaped ribs are arranged symmetrically with respect to the center line of the cap beam.

[0028] The leveling layer is located above the cap beam and is used to adjust the flatness of the road surface and transfer the driving load;

[0029] The asphalt concrete surface layer is located above the leveling layer, and together with the leveling layer, forms a flat driving surface;

[0030] The high-toughness cement concrete is laid on the top of the box beam and the cap beam, connected to the box beam and the cap beam through gate-shaped reinforcement, and its top is flush with the top of the asphalt concrete surface layer;

[0031] The seamless expansion structure is arranged symmetrically, distributed directly above the two bridge expansion joints, located in the groove formed by high-toughness cement concrete, and the top is flush with the asphalt concrete surface layer.

[0032] Furthermore, the door-shaped reinforcement includes a top transverse section and vertical sections connected to both ends of the top transverse section. The height of the top transverse section is flush with the leveling layer, and the lower part of the vertical section is at least 48 cm embedded in the box beam or cap beam.

[0033] The present invention also includes a method for constructing a separated large-displacement seamless telescopic bridge, and the construction of the above-mentioned bridge includes the following steps:

[0034] S1: Install the inverted T-shaped cap beam, support, support anti-vibration block and box beam in sequence. When pouring the cap beam and box beam, reserve gate-shaped reinforcement on the top. The top of the cap beam is at the same height as the top of the box beams on both sides to form the first expansion joint and the second expansion joint.

[0035] S2: A leveling layer is applied to the entire section on the plane formed by the box girder, inverted T-shaped cap beam, the first expansion joint, and the second expansion joint. When the notch of the bridge's separated large displacement seamless expansion joint is reached, the pouring is stopped by erecting the formwork, and the notch is filled with crushed stones, rags, etc. to the leveling layer elevation, and then the asphalt concrete surface layer is paved over the entire section;

[0036] S3: Excavate the asphalt concrete surface layer, crushed stone and waste cloth cushion layer in the slot to expose the first expansion joint, the second expansion joint, the cap beam portal reinforcement and the box beam portal reinforcement;

[0037] S4: The side formwork is welded and fixed above the first expansion joint and the second expansion joint. The height of the side formwork is flush with the bottom of the seamless expansion structure. Foam glue is sprayed on the overlap between the side formwork and the expansion joint for sealing;

[0038] S5: Measure and determine the position of the outer angle steel, determine the design height, distance from the edge and installation angle of the outer angle steel, and then fix the lower shear nails of the anchor bolts to the gate reinforcement by welding;

[0039] S6: Place the span steel plate on the side formwork, with its bottom flush with the bottom of the outer angle steel;

[0040] S7: Pour high-toughness cement concrete from the gap between the outer angle steel and the asphalt concrete surface layer. Pour high-toughness cement concrete above the cap beam from the junction of the seamless expansion structure. The next step of construction begins after the high-toughness cement concrete reaches 90% of the design strength;

[0041] S8: Pour a layer of super-tough resin, then fix the inner angle steel and anchor bolts with nuts, and allow the super-tough resin to overflow slightly, and then install the elastic structure;

[0042] S9: Pour another layer of super-tough resin until it is flush with the asphalt concrete surface layer on both sides, and smooth out the uneven areas for a second time;

[0043] S10: After 24 hours of health care, traffic will be opened.

[0044] The beneficial effects of the present invention are as follows: the present invention increases the deformation of the resin seamless expansion joint and can be used in bridges with a horizontal deformation of 160mm to 240mm. The bridge-separated large-displacement seamless expansion joint realizes the seamlessness of the large-displacement bridge expansion joint. Compared with the traditional modular large-displacement expansion joint, it can reduce noise by 8 to 10dB, avoid the safety hazards of the rigid materials of the traditional expansion joint, and provide high driving comfort and excellent driving safety. The bridge-separated large-displacement seamless expansion joint adopts high-toughness cement concrete to increase the strength of both sides and the bottom of the expansion joint, strengthen the bearing capacity of the expansion joint, and avoid early cracking of the concrete in the anchoring area of ​​the expansion joint. The device itself has zero water seepage, zero impact, no cracking, excellent durability, and increases the service life of the large-displacement expansion joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 It is a structural schematic diagram of a seamless telescopic structure;

[0047] Figure 2 is a structural schematic diagram of the anchoring structure;

[0048] Figure 3It is a structural schematic diagram of the cross-seam steel plate;

[0049] Figure 4 This is a schematic diagram of the bridge structure;

[0050] Figure 5 for Figure 4 A partial enlarged view of point A in the middle. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0052] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0053] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] like Figures 1 to 5 Shown: A bridge separated large displacement seamless telescopic structure, comprising:

[0055] The cross-seam steel plate 13 is arranged on the expansion joint and covers the expansion joint;

[0056] Two anchor structures 16, the two anchor structures are respectively located at two ends of the spanning steel plate 13, and there is at least a spacing between the two anchor structures and the spanning steel plate 13, and the two anchor structures are anchored to the bridge structure at both ends of the expansion joint;

[0057] An elastic structure 17, two ends of the elastic structure 17 are respectively fixedly connected to the two anchoring structures;

[0058] The super-tough resin 18 is used to fill the gaps between the cross-seam steel plate 13 , the anchoring structure 16 and the elastic structure 17 .

[0059] In this embodiment, the anchoring structure includes:

[0060] An outer angle steel 12, the outer angle steel 12 comprises a vertical end and a horizontal section, the vertical end and the horizontal section are respectively anchored to the bridge structure, and the horizontal sections of the two outer angle steels 12 are arranged close to each other;

[0061] The inner angle steel 15 is fixedly arranged at the horizontal section, and both ends of the elastic structure are fixedly connected to the inner angle steel 15 respectively.

[0062] The anchoring structure also includes:

[0063] Vertical anchor bolts 1611, which respectively connect the horizontal section of the outer angle steel 12 and the inner angle steel 15, and anchor the outer angle steel 12 longitudinally;

[0064] Horizontal anchor bolts 162 are connected to the vertical ends of the outer angle steels 12 to anchor the outer angle steels 12 transversely.

[0065] The vertical anchor bolt 161 includes a straight rod threaded section at the top of the horizontal section and a straight rod non-threaded shear nail at the bottom of the horizontal section.

[0066] As a preferred embodiment of the above, the elastic structure 17 includes:

[0067] Threaded steel pipe, the threaded steel pipe is set on the anchoring structure;

[0068] A rigid casing is partially sleeved on the threaded steel pipe and is located at both ends of the threaded steel pipe. The rigid casing and both ends of the threaded steel pipe are arranged on the anchoring structure.

[0069] A compression spring is arranged in the rigid sleeve and is in a compressed state.

[0070] Slope structures 131 are provided at both ends of the cross-seam steel plate 13 .

[0071] This embodiment also includes a separated large displacement seamless telescopic bridge, including:

[0072] The cap beam 1, the support anti-vibration block 2, the support 3, the box beam 4, the door-shaped reinforcement, the leveling layer 7, the asphalt concrete surface layer 8, the high-toughness cement concrete 14 and the seamless telescopic structure 20 as described above are constructed in sequence from bottom to top;

[0073] The cap beam 1 is in an inverted T shape, and three rows of cap beam 1 gate-shaped bars are arranged on the top. The cap beam 1 gate-shaped bars are arranged symmetrically, and the width of the middle gate-shaped bar is half of that of the two sides;

[0074] The supports 3 are located at the upper part of the two wings of the inverted T-shaped cap beam 1 and are arranged symmetrically to provide the box beam 4 with the required deformation for vertical deformation. The supports 3 are provided with support anti-vibration blocks 2 on both sides to prevent the support 3 from displacement and reduce vibration.

[0075] The box beam 4 is located above the support 3 and is arranged symmetrically. The top surface height is consistent with the height of the cap beam 1, and together with the cap beam 1, it forms the first expansion joint 5 and the second expansion joint 6. A single row of gate-shaped ribs are arranged on the top of each side. The gate-shaped ribs of the box beam 4 are arranged symmetrically with respect to the center line of the cap beam 1.

[0076] The leveling layer 7 is located above the cap beam 1 and is used to adjust the flatness of the road surface and transfer the driving load;

[0077] The asphalt concrete surface layer 8 is located above the leveling layer 7, and together with the leveling layer 7 forms a flat driving surface;

[0078] High-toughness cement concrete 14 is laid on the top of the box beam 4 and the cap beam 1, connected to the box beam 4 and the cap beam 1 through gate-shaped reinforcement, and its top is flush with the top of the asphalt concrete surface layer 8;

[0079] The seamless telescopic structure 20 is arranged symmetrically, distributed directly above the two bridge expansion joints, located in the groove 11 formed by the high-toughness cement concrete 14, and the top is flush with the asphalt concrete surface layer 8.

[0080] As a preferred embodiment of the above, the gate-shaped reinforcement includes a top transverse section and vertical sections connected to both ends of the top transverse section. The height of the top transverse section is flush with the leveling layer 7, and the lower part of the vertical section is at least 148 cm embedded in the box beam 4 or the cap beam.

[0081] This embodiment also includes a construction method of a separated large displacement seamless telescopic bridge, and the construction of the above-mentioned bridge includes the following steps:

[0082] S1: Install the inverted T-shaped cap beam 1, the support 3, the support anti-vibration block 2 and the box beam 4 in sequence. When pouring the cap beam 1 and the box beam 4, a gate-shaped reinforcement is reserved on the top. The top of the cap beam 1 is at the same height as the top of the box beams 4 on both sides, forming the first expansion joint 5 and the second expansion joint 6;

[0083] S2: Implement the leveling layer 7 on the plane formed by the box girder 4, the inverted T-shaped cap beam 1, the first expansion joint 5, and the second expansion joint 6. When the bridge separated large displacement seamless expansion joint notch 11 is located, stop pouring by erecting the formwork, fill the notch 11 with crushed stones, rags, etc. to the leveling layer 7 elevation, and then pave the asphalt concrete surface layer 8 on the entire section;

[0084] S3: excavating the asphalt concrete surface layer 8 and the crushed stone and waste cloth cushion layer in the notch 11 to expose the first expansion joint 5, the second expansion joint 6, the gate-shaped reinforcement of the cap beam 1 and the gate-shaped reinforcement of the box beam 4;

[0085] S4: The side formwork is welded and fixed above the first expansion joint 5 and the second expansion joint 6. The height of the side formwork is flush with the bottom of the seamless expansion structure 20. Foam glue is sprayed on the overlap between the side formwork and the expansion joint to seal it.

[0086] S5: After measuring and determining the position of the outer angle steel 12, determining the design height, distance from the edge and installation angle of the outer angle steel 12, the lower shear nails of the anchor bolts 16 are fixed to the gate-shaped reinforcement by welding;

[0087] S6: Place the cross-seam steel plate 13 on the side formwork, with its bottom flush with the bottom of the outer angle steel 12;

[0088] S7: pour high-toughness cement concrete 14 from the gap between the outer angle steel 12 and the asphalt concrete surface layer 8, and pour the high-toughness cement concrete 14 above the cap beam 1 from the junction of the seamless telescopic structure 20. After the high-toughness cement concrete 14 reaches 90% of the design strength during curing, the next step of construction begins;

[0089] S8: pour a layer of super-tough resin, then fix the inner angle steel 15 and the anchor bolt 16 through nuts, and allow the super-tough resin to overflow slightly, and then install the elastic structure 17;

[0090] S9: pour another layer of super-tough resin until it is flush with the asphalt concrete surface layer 8 on both sides, and smooth the uneven areas for a second time;

[0091] S10: After 24 hours of health care, traffic will be opened.

[0092] The beneficial effects of this embodiment are:

[0093] (1) The deformation of the resin seamless expansion joint is increased, and it can be used in bridges with a horizontal deformation of 160 mm to 240 mm.

[0094] (2) The bridge separated large displacement seamless expansion joint realizes the seamlessness of large displacement bridge expansion joints. Compared with the traditional modular large displacement expansion joints, it can reduce noise by 8 to 10 dB, avoid the safety hazards of rigid materials of traditional expansion joints, and provide high driving comfort and excellent driving safety.

[0095] (3) The bridge separated large displacement seamless expansion joint adopts high-toughness cement concrete 14 to improve the strength of both sides and the bottom of the expansion joint, enhance the bearing capacity of the expansion joint, and avoid early cracking of the concrete in the anchoring area of ​​the expansion joint. The device itself has zero water seepage, zero impact, no cracking, excellent durability, and improves the service life of the large displacement expansion device.

[0096] Embodiment 2:

[0097] In order to achieve the above-mentioned purpose, the present invention provides a bridge separated large displacement seamless expansion joint structure, including a cap beam 1, a support shock-absorbing block 2, a support 3, a box beam 4, a gate-shaped reinforcement, a leveling layer 7, an asphalt concrete surface layer 8, a high-toughness cement concrete 14 and a super-tough resin 18 seamless expansion device constructed in sequence from bottom to top.

[0098] The cap beam 1 is in an inverted T shape, and three rows of cap beam 1 gate-shaped bars are arranged on the top. The cap beam 1 gate-shaped bars are arranged symmetrically, and the width of the middle gate-shaped bar is half of that of the two sides;

[0099] The supports 3 are located on the upper part of the two wings of the inverted T-shaped cap beam 1 and are arranged symmetrically to provide the box beam 4 with the required deformation for vertical deformation. There are support shock-proof blocks 2 on both sides of the supports 3 to prevent the displacement of the supports 3 and reduce vibration.

[0100] The box girder 4 is located above the support 3 and is arranged symmetrically. The top surface height is consistent with the height of the cap beam 1, and together with the cap beam 1, it forms the first expansion joint 5 and the second expansion joint 6. A single row of gate-shaped reinforcement is arranged on the top of each side, and the gate-shaped reinforcement of the box girder 4 is arranged symmetrically with respect to the center line of the cap beam 1.

[0101] The leveling layer 7 is located above the cap beam 1 and is used to adjust the flatness of the road surface and transfer the vehicle load.

[0102] The asphalt concrete surface layer 8 is located above the leveling layer 7 and together with the leveling layer 7 forms a flat driving surface.

[0103] High-toughness cement concrete 14 is laid on the top of the box beam 4 and the cap beam 1 , connected to the box beam 4 and the cap beam 1 through gate-shaped reinforcement, and its top is flush with the top of the asphalt concrete surface layer 8 .

[0104] The super-tough resin 18 seamless expansion device is arranged symmetrically, distributed directly above the two bridge expansion joints, located inside the high-toughness cement concrete 14, and the top is flush with the asphalt concrete surface layer 8.

[0105] The separate large displacement seamless telescopic device can meet the deformation requirements of bridges from 160mm to 240mm.

[0106] The gate-shaped reinforcement, including the top horizontal section and the vertical sections connected to the two ends of the horizontal section, must be flush with the leveling layer 7, and the lower part must be embedded in the box beam 4 and the cap beam 1 ≥ 48 cm.

[0107] High-toughness cement concrete 14 is composed of 65-70 parts of dry mix, 7-9 parts of chopped steel fibers, 9-15 parts of water and 2-3 parts of polycarboxylic acid water reducer; wherein the dry mix includes 25-30 parts of silicate cement, 6-10 parts of silica fume, 8-12 parts of quartz powder and 30-35 parts of quartz sand with a particle size of ≤1 mm.

[0108] Super-tough resin elastic seamless telescopic device, a single super-tough resin elastic seamless telescopic device can meet the maximum deformation requirement of 120mm.

[0109] The super-tough resin elastic seamless telescopic device is composed of a rigid component, an elastic structure 17 and a super-tough resin 18.

[0110] The rigid components are rigid materials such as the inner angle steel 15, the outer angle steel 12, the anchor bolts 16 and the cross-seam steel plate 13, and their strength must be no less than Q345B.

[0111] The outer angle steel 12 is connected to the middle part of the anchor bolt 16 by welding. The portion of the anchor bolt 16 exposed above the angle steel is a straight rod threaded shape, and the portion exposed below the angle steel is a straight rod non-threaded shear nail.

[0112] The elastic structure 17 includes a threaded steel pipe and a rigid sleeve, wherein one end of the rigid sleeve is closed and the other end is open, a spring in a compressed state is inserted into the rigid sleeve, the open end of the rigid sleeve is sleeved on the threaded steel pipe and partially overlaps, and the overlapping part of the rigid sleeve and the threaded steel pipe is passed through the through hole of the angle steel and clamped by the slots located on both sides of the inner angle steel 15.

[0113] The super-tough resin 18 is prepared by mixing component A and component B. Calculated by weight, component A includes 70-75 parts of polyether polyol, 10-15 parts of nano negative Poisson's ratio unit, 20-40 parts of diethanolamine and 1-4 parts of defoaming agent; component B includes 40-60 parts of isocyanate, 20-35 parts of short-cut polyester fiber, 15-20 parts of bisphenol A epoxy resin, 5-10 parts of 1,4-butanediol and 3-5 parts of organic metal catalyst.

[0114] This embodiment provides a construction process for a bridge separated large displacement seamless expansion joint. It should be noted that the construction process for the seamless expansion joint provided in this embodiment includes the following steps:

[0115] S1: The inverted T-shaped cap beam 1 is prefabricated on site. The inverted T-shaped cap beam 1 is erected, and the height of the top surface of the template is the same as the height of the top surface of the box beam 4. During pouring, three rows of cap beam gate reinforcements 9 and support anti-vibration blocks 2 are installed, and curing is performed after the construction is completed.

[0116] S2: After the anti-vibration block 2 is cured, the support pad stone 3 is installed in the vibration block, and the box beam 4 is hoisted. The box beam 4 is prefabricated on site, and the box beam gate reinforcement 10 is installed during production.

[0117] S3: After the lifting is completed, check the height difference between the top surface of the box beam 4 and the top surface of the cap beam 1. If the height difference is ≤5mm, the next step of construction can be carried out. If the height difference does not meet the requirements, the protruding part needs to be chiseled off.

[0118] S4: construct the leveling layer 7 on the top of the box girder 4 in the whole section. When the construction reaches the notch 11, set up the template and stop the construction of the leveling layer 7. Fill the notch with crushed stones, rags, etc. to the level of the leveling layer 7, and then pave the asphalt concrete surface layer 8 in the whole section.

[0119] S5: reverse excavation of the asphalt concrete surface layer 8, cleaning the gravel and rags in the notch 11, exposing the cap beam portal reinforcement 9, the box beam portal reinforcement 10, the first expansion joint 5 and the second expansion joint 6.

[0120] S6: Weld and fix four side templates, the side templates are welded and fixed to the two sides of the first expansion joint 5 and the second expansion joint 6, and foam glue is sprayed on the overlap between the side template and the expansion joint for sealing;

[0121] S7: Install the outer angle steel 12 and the cross-joint steel plate 13 on the first expansion joint 5 and the second expansion joint 6. Measure and determine the position of the outer angle steel 12, the upper edge of the outer angle steel 12 is flush with the road surface, and is fixed to the cap beam gate rib 9 and the box beam gate rib 10 by welding, and the cross-joint steel plate 13 is placed on the side formwork.

[0122] S8: pour high-toughness cement concrete 14 on the box beam 4 from both sides of the outer angle steel 12 until it is flush with the asphalt concrete surface layer 8 on both sides, and then pour it from the outside of the two super-tough resin elastomer seamless expansion devices to the cap beam 1. After the high-toughness cement concrete 14 reaches 90% of the design strength during curing, the next step of construction begins;

[0123] S9: pour a layer of super-tough resin 18, install the inner angle steel 15, and use nuts to fix the inner angle steel 15 and the anchor bolts 16. Then install the elastic structure 17 into the hole of the inner angle steel 15, and pour the super-tough resin elastic body until it is flush with the asphalt concrete surface layer 8 on both sides of the notch 11 and the top of the high-toughness cement concrete 9.

[0124] S10: Traffic will be reopened after 24 hours of maintenance.

[0125] The performance test results after construction are as follows:

[0126] project unit Numeric Joint height difference mm 1 Horizontal flatness mm 1 Peak noise reduction (relative to analog) dB 10 Water penetration coefficient (joints, surfaces) mL / min 0 Hardness (super tough resin elastomer) IRHD 68 Tensile strength (super tough resin elastomer) Mpa 12.6 Elongation at break (super tough resin elastomer) ％ 460

[0127] The material performance test results are as follows:

[0128] project unit Numeric Tensile strength (super tough resin elastomer) MPa 12.6 Elongation at break (super tough resin elastomer) ％ 780

[0129] It can be seen from the above test results that the large-displacement seamless telescopic device provided in this embodiment has low noise and high driving comfort after being opened to traffic. The elongation at break of the super-tough resin elastomer reaches 780%, which can meet the needs of large-deformation bridges.

[0130] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A bridge separated large displacement seamless telescopic structure, characterized in that: include: A cross-seam steel plate, wherein the cross-seam steel plate is arranged on the expansion joint and covers the expansion joint; Two anchoring structures, the two anchoring structures are respectively located at two ends of the spanning steel plate, and there is at least a spacing between the two anchoring structures and the spanning steel plate, and the two anchoring structures are anchored to the bridge structure at both ends of the expansion joint; An elastic structure, two ends of which are respectively fixedly connected to the two anchoring structures; Super-tough resin, the super-tough resin is used to fill the gaps between the seam-spanning steel plates, the anchoring structures and the elastic structures.

2. The bridge separation type large displacement seamless telescopic structure according to claim 1 is characterized in that: The anchoring structure comprises: An outer angle steel, the outer angle steel comprising a vertical end and a horizontal section, the vertical end and the horizontal section are respectively anchored to the bridge structure, and the horizontal sections of the two outer angle steels are arranged close to each other; An inner angle steel is fixedly arranged on the horizontal section, and two ends of the elastic structure are respectively fixedly connected to the inner angle steel.

3. The bridge separation type large displacement seamless telescopic structure according to claim 2 is characterized in that: The anchoring structure further comprises: Vertical anchor bolts, the vertical anchor bolts respectively connect the horizontal section of the outer angle steel and the inner angle steel, and anchor the outer angle steel longitudinally; A horizontal anchor bolt is connected to the vertical end of the outer angle steel to transversely anchor the outer angle steel.

4. The bridge separation type large displacement seamless telescopic structure according to claim 3 is characterized in that: The vertical anchor bolt comprises a straight rod threaded section at the top of the horizontal section and a straight rod non-threaded shear nail at the bottom of the horizontal section.

5. The bridge separation type large displacement seamless telescopic structure according to claim 1 is characterized in that: The elastic structure comprises: A threaded steel pipe, wherein the threaded steel pipe is arranged on the anchoring structure; A rigid sleeve, wherein the rigid sleeve is partially sleeved on the threaded steel pipe and is located at both ends of the threaded steel pipe, and the rigid sleeve and both ends of the threaded steel pipe are arranged on the anchoring structure; A compression spring is disposed in the rigid sleeve and is in a compressed state.

6. The bridge separation type large displacement seamless telescopic structure according to claim 1 is characterized in that: Both ends of the cross-seam steel plate are provided with slope structures.

7. A separated large displacement seamless telescopic bridge, characterized in that: include: A cap beam, a support anti-vibration block, a support, a box beam, a door-shaped reinforcement, a leveling layer, an asphalt concrete surface layer, a high-toughness cement concrete, and a seamless telescopic structure as claimed in any one of claims 1 to 6, which are constructed in sequence from bottom to top; The cap beam is in an inverted T shape, with three rows of cap beam gate-shaped bars arranged on the top, the cap beam gate-shaped bars are arranged symmetrically, and the width of the middle gate-shaped bar is half of that of the two sides; The supports are located at the upper part of the two wings of the inverted T-shaped cap beam and are arranged symmetrically to provide the box beam with the required deformation for vertical deformation. There are support anti-vibration blocks on both sides of the supports to prevent the support from shifting and reduce vibration. The box beam is located above the support and is arranged symmetrically. The top surface height is consistent with the cap beam height, and together with the cap beam, it forms a first expansion joint and a second expansion joint. A single row of gate-shaped ribs are arranged on the top of each side, and the box beam gate-shaped ribs are arranged symmetrically with respect to the center line of the cap beam. The leveling layer is located above the cap beam and is used to adjust the flatness of the road surface and transfer the driving load; The asphalt concrete surface layer is located above the leveling layer, and together with the leveling layer, forms a flat driving surface; The high-toughness cement concrete is laid on the top of the box beam and the cap beam, connected to the box beam and the cap beam through gate-shaped reinforcement, and its top is flush with the top of the asphalt concrete surface layer; The seamless expansion structure is arranged symmetrically, distributed directly above the two bridge expansion joints, located in the groove formed by high-toughness cement concrete, and the top is flush with the asphalt concrete surface layer.

8. The separated large displacement seamless telescopic bridge according to claim 7 is characterized in that: The gate-shaped reinforcement includes a top transverse section and vertical sections connected to both ends of the top transverse section. The height of the top transverse section is flush with the leveling layer, and the lower part of the vertical section is at least 48 cm embedded in the box beam or cap beam.

9. A construction method for a separated large displacement seamless telescopic bridge, characterized in that: The construction of the bridge as claimed in claim 7 or 8 comprises the following steps: S1: Install the inverted T-shaped cap beam, support, support anti-vibration block and box beam in sequence. When pouring the cap beam and box beam, reserve gate-shaped reinforcement on the top. The top of the cap beam is at the same height as the top of the box beams on both sides to form the first expansion joint and the second expansion joint. S2: A leveling layer is applied to the entire section on the plane formed by the box girder, inverted T-shaped cap beam, the first expansion joint, and the second expansion joint. When the notch of the bridge's separated large displacement seamless expansion joint is reached, the pouring is stopped by erecting the formwork, and the notch is filled with crushed stones, rags, etc. to the leveling layer elevation, and then the asphalt concrete surface layer is paved over the entire section; S3: Excavate the asphalt concrete surface layer, crushed stone and waste cloth cushion layer in the slot to expose the first expansion joint, the second expansion joint, the cap beam portal reinforcement and the box beam portal reinforcement; S4: The side formwork is welded and fixed above the first expansion joint and the second expansion joint. The height of the side formwork is flush with the bottom of the seamless expansion structure. Foam glue is sprayed on the overlap between the side formwork and the expansion joint for sealing; S5: Measure and determine the position of the outer angle steel, determine the design height, distance from the edge and installation angle of the outer angle steel, and then fix the lower shear nails of the anchor bolts to the gate reinforcement by welding; S6: Place the span steel plate on the side formwork, with its bottom flush with the bottom of the outer angle steel; S7: Pour high-toughness cement concrete from the gap between the outer angle steel and the asphalt concrete surface layer. Pour high-toughness cement concrete above the cap beam from the junction of the seamless expansion structure. After the high-toughness cement concrete reaches 90% of the design strength, start the next step of construction; S8: Pour a layer of super-tough resin, then fix the inner angle steel and anchor bolts with nuts, and allow the super-tough resin to overflow slightly, and then install the elastic structure; S9: Pour another layer of super-tough resin until it is flush with the asphalt concrete surface layer on both sides, and smooth out the uneven areas for a second time; S10: After 24 hours of health care, traffic will be opened.

Images