Bridge expansion joint device and mounting and dismounting method thereof

Abstract

The invention relates to a bridge expansion joint device and a mounting and dismounting method thereof.The expansion joint device is arranged in the transverse bridge direction in a full-length mode and divided into a plurality of standard sections and sealing sections located at the two ends of a bridge, and the expansion joint device comprises a prefabricated base and a prefabricated panel which are matched with each other; the prefabricated bases are fixed to beam bodies on the two sides of a bridge expansion joint, and fixing grooves used for containing the prefabricated panels are formed in the prefabricated bases. The fixing groove of the sealing section prefabricated base serves as an installation opening and can contain the standard section prefabricated panel and the sealing section prefabricated panel to be installed from one side of the bridge floor, and the fixing groove of the standard section prefabricated base is provided with a limiting structure used for anchoring the standard section prefabricated panel compared with the fixing groove of the sealing section prefabricated base. The fixing groove of the prefabricated base and the cross section, in the length direction of the expansion joint, of the prefabricated panel are meshed with each other, and the prefabricated panel is embedded in the prefabricated base to achieve anchoring. Compared with the prior art, the device is ingenious in structure, has the advantages of being convenient to construct, reliable in stress and low in manufacturing cost, and is convenient to popularize and use.

Description

Technical Field

[0001] The present invention relates to the technical field of expansion joints in bridge engineering, and in particular to the structure of a "drawer-type" expansion joint device for bridges that can be quickly installed and replaced, and methods for installing and disassembling the device. Background Art

[0002] Commonly used expansion joints for highway bridges include steel expansion joints, integral comb plate expansion joints, modular comb plate expansion joints, rubber expansion joints and other forms. In the existing technology, when installing bridge expansion joints, the bridge expansion joints are basically fixed by the post-cast strip method, which has a long construction period and a relatively complicated installation process. Under the repeated rolling and impact of vehicles, the bridge expansion joints using this installation method are prone to the safety hazards of damage to the post-cast strip and falling off of the tooth plate, which seriously affects driving safety. In addition, for the integral comb plate expansion joint, since it is completely solidified in the post-cast strip, the water stop, which is one of its components, cannot be replaced periodically normally, which will cause rainwater to leak downward along the expansion joint, seriously affecting the durability of structures such as hinge joints, supports, and cap beams.

[0003] To address the aforementioned hidden dangers, existing technologies use partial repair or complete replacement methods to repair expansion joints. For steel expansion joints, the main problem is damaged post-cast strips. Repair or replacement requires partial or complete removal of the post-cast strips for repair. For integral comb plate expansion joints, the main problems include damaged post-cast strips and aging waterstops. Repairs require opening the comb plates and post-cast strip concrete, which is equivalent to redoing the expansion joint. For modular comb plate expansion joints, the main problems are loose bolts and detached comb plates. Repairs require replacement of the comb plates. Existing bridge expansion joint repair technologies are unable to achieve complete repairs, and the phenomenon of repeated damage and repairs remains unresolved. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a bridge expansion joint device structure and its installation and disassembly method.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] As a first aspect of the present invention, a rapidly installed and replaceable expansion joint device for a bridge is provided. The device comprises a standard-section precast base, a sealed-section precast base, a standard-section precast panel, a sealed-section precast panel, a dust shield, a buffer device, a waterstop, and a water conduit. The precast base and the precast panel interlock in cross-section, with the precast panel nested within the base to anchor the panel. The buffer device forms a vertical buffer zone between the precast base and the precast panel, protecting them from the impact of passing vehicles. The waterstop and the water conduit, respectively, provide waterproofing and drainage.

[0007] As a second aspect of the present invention, a method for installing and disassembling the expansion joint device for a bridge as described above is provided.

[0008] Among them, the installation method includes the following main steps: a. The bottom plate of the prefabricated base is connected to the bridge, and a gap is reserved between the prefabricated base and the top surface of the bridge; b. High-strength cement mortar is poured between the prefabricated base and the top surface of the bridge and the prefabricated base is adjusted to be level, so that the two sets of prefabricated bases are respectively fixed on the beams on both sides of the expansion joint of the bridge; c. The water stop is fixed to the side of the two sets of prefabricated bases; the dustproof plate is fixed to the top surface of the prefabricated base on both sides of the expansion joint; d. The buffer device is fixed on the prefabricated panel; e. The standard section prefabricated panel slides in turn from the installation openings at both ends of the sealing section prefabricated base, and is pushed to the designated position of the standard section prefabricated base 1; f. The sealing section prefabricated panel is finally installed in the sealing section prefabricated base.

[0009] The disassembly method is opposite to the above-mentioned installation steps, and usually only involves three steps d, e, and f, namely: remove the prefabricated panels 4 and 3 in sequence along the direction of the expansion joint, and at the same time pull out the buffer device 6 fixed on the prefabricated panel; open the dustproof plate and remove the waterstop; install a new waterstop 7, and re-fix the dustproof plate; install new prefabricated panels and corresponding buffer devices in sequence.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1) The improved solution described in the present invention nests the prefabricated panel in the groove of the prefabricated base, and the panel can be anchored without bolts, and its vertical vibration is restricted by the buffer device. Its installation and disassembly are not affected by other factors. Compared with the conventional comb plate expansion joint device, the present invention fundamentally eliminates the hidden dangers of loose bolts and falling off of the comb plate, and can achieve rapid installation and disassembly, thereby greatly shortening the on-site construction period, saving labor costs, reducing construction energy consumption, and alleviating traffic pressure during construction.

[0012] 2) The solution provided by the present invention disassembles the main structure of the expansion joint device into a prefabricated base and prefabricated panels that match each other. The prefabricated base has reasonable force and excellent anchoring performance. Its service life is consistent with the designed (remaining) service life of the bridge. The on-site construction process only involves bolt connection and high-strength cement mortar pouring. After installation, the prefabricated base becomes a permanent component, fundamentally solving the pain point of repeated maintenance or even replacement of the post-cast strips of conventional expansion joint devices.

[0013] 3) The structure of the present invention is ingenious, and has the characteristics of simple structure, convenient construction, reliable force bearing, and economical cost, and is easy to promote and utilize. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A three-dimensional view of a standard section of a "drawer-type" bridge expansion device according to the present invention;

[0015] Figure 2 A three-dimensional view of the sealing section of the "drawer-type" bridge expansion device of the present invention;

[0016] Figure 3 This is a structural cross-sectional view of the standard section of the present invention;

[0017] Figure 4 It is a structural cross-sectional view of the sealing section of the present invention;

[0018] Figure 5 5a) is a structural view of the standard section prefabricated base of the present invention; 5b) is a stereoscopic view of the standard section prefabricated base Figure 5 The cross-sectional view at AA in a) is Figure 5 Cross-sectional view at BB in a;

[0019] Figure 6 6a) is a structural view of the prefabricated base of the sealing section of the present invention; 6b) is a three-dimensional view of the prefabricated base of the sealing section Figure 6 The cross-sectional view at AA in a) is Figure 6 Cross-sectional view at BB in a;

[0020] Figure 7 This is a schematic diagram of the assembly of the standard segment prefabricated panels of the present invention;

[0021] Figure 8 This is a structural view of a standard segment prefabricated panel of the present invention;

[0022] Figure 9 This is a schematic diagram of the assembly of the prefabricated panels of the sealing section of the present invention;

[0023] Figure 10 This is a structural view of the prefabricated panel of the sealing section of the present invention;

[0024] Figure 11 This is a cross-sectional view of a second embodiment of the "drawer-type" bridge expansion device of the present invention;

[0025] Figure 12 This is a flow chart for installing the bridge expansion joint device of the present invention;

[0026] Figure 13 This is a disassembly flow chart of the bridge expansion joint device of the present invention;

[0027] The numbers in the figure are as follows: 1. Prefabricated base for standard section, 2. Prefabricated base for sealing section, 3. Prefabricated panel for standard section, 4. Prefabricated panel for sealing section, 5. Dustproof plate, 6. Buffer device, 7. Water stop, 8. Water guide pipe, 9. Bridge beam, 10. Embedded bolts, 11. High-strength cement mortar layer, 12. Bridge deck pavement layer. DETAILED DESCRIPTION

[0028] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0029] Example 1:

[0030] As one embodiment of the present invention, a bridge expansion joint device structure that can be quickly installed and quickly replaced is provided. Figure 1-4 As shown, its components include a standard section prefabricated base 1, a sealed section prefabricated base 2, a standard section prefabricated panel 3, a sealed section prefabricated panel 4, a dustproof plate 5, a buffer device 6, a waterstop 7, and a water conduit 8. Its characteristics are: the cross-sections of the prefabricated base and the prefabricated panel are interlocking, the prefabricated panel is nested within the prefabricated base to achieve panel anchoring, the buffer device 6 forms a vertical buffer zone between the prefabricated base and the prefabricated panel to withstand the impact of passing cars, and the waterstop 7 and water conduit 8 respectively play the role of waterproofing and drainage.

[0031] The precast base is determined by the type of bridge structure and is a prefabricated component. It can be concrete, steel-concrete composite (concrete encased in steel sections, with concrete inside steel boxes), steel, or cast steel. Concrete bases are made of ordinary reinforced concrete; steel-concrete composite bases are made of steel plates, ordinary reinforced concrete, and shear keys, which can be made of welded studs, steel sections, flat steel, ribbed steel bars, or plain round steel bars; steel bases are welded from steel plates; and cast steel bases are made of carbon or alloy steel processed through a heat treatment process.

[0032] The prefabricated panel is made of steel plate, and its thickness is determined according to the expansion and contraction amount of the expansion joint device; the dustproof plate 5 is made of stainless steel plate or Teflon slide plate; the buffer device 6 is made of high-damping rubber material or high-damping spring; the water stop 7 is made of rubber strip or flat steel bending; the water pipe 8 is made of a funnel-shaped water collection port and a PVC pipe.

[0033] like Figure 5-6 As shown, the π-shaped standard section prefabricated base 1 and the π-shaped prefabricated panel 3 used in this embodiment and the sealing section prefabricated base 2 and the sealing section prefabricated panel 4 used in this embodiment are respectively shown.

[0034] The π-shaped standard segment precast base 1 and the closed segment precast base 2 of this embodiment are both constructed of conventional reinforced concrete. They are arranged along the entire transverse length of the bridge, with preferred segment lengths of 6 to 10 meters. Their base plates are equipped with bolt holes and connected to the beam body via embedded bolts 10. They are then leveled and secured with high-strength cement mortar 11. Leveling here does not necessarily mean horizontality; rather, it means ensuring that the bottom surface of the precast base and the top surface of the notch are aligned with the transverse slope of the bridge deck, thereby ensuring a smooth transition between the top surface of the expansion joint assembly and the bridge deck. The high-strength cement mortar 11 should be a micro-expansion mortar or a shrinkage-compensating mortar.

[0035] The water stop 7 and the water pipe 8 of this embodiment are fixed to the sides of the π-shaped standard section prefabricated base 1 and the sealing section prefabricated base 2 through slots; the dustproof plate 5 is a baffle above the water stop 7 to prevent foreign matter from falling into the water stop, and is composed of a stainless steel plate or a Teflon plate, preferably a stainless steel plate, and is fixed to the top surfaces of the prefabricated base 1 and the prefabricated base 2 on both sides of the expansion joint.

[0036] like Figure 7 and 9 As shown, the standard section prefabricated panels 3 and the sealing section prefabricated panels 4 of this embodiment are made of steel components, which are improved modular comb plate structures. The structural dimensions such as the steel plate thickness and panel width should be specially designed according to the requirements of the bridge design load. Figure 8 and 10 As shown, considering the convenience of installation and disassembly, the left and right standard section prefabricated panels 3 are a staggered group, and are slid into the installation openings at both ends of the sealing section prefabricated base 2 at the same time, and are pushed horizontally along the length direction of the expansion joint to the designated installation position to complete the installation of a group of standard panels 3. The sealing section prefabricated panels 4 are finally installed in the sealing section prefabricated base 2.

[0037] The buffer device 6 of this embodiment is installed between the horizontal contact surface of the base and the panel, mainly used to buffer the vertical impact force between the base and the panel. The specific installation position is determined according to the base shape of different embodiments. The buffer device 6 can be made of high-damping rubber material, high-damping spring, etc.

[0038] As a second aspect of the present invention, this embodiment also provides a method for installing and disassembling the telescopic device for a bridge as described above, and the installation and disassembly processes can be summarized as the processes of "closing the drawer" and "opening the drawer", respectively.

[0039] Specifically, such as Figure 12 The installation method of the bridge expansion joint device of this embodiment includes the following steps:

[0040] S101. Determine the geometric dimensions of each component of the expansion joint device based on the structural dimensions of the bridge and the bridge deck system layout plan.

[0041] S102. Clean the debris in the reserved groove of the expansion joint of the bridge beam.

[0042] S103 , connecting the prefabricated bases 1 and 2 to the beam body 9 through embedded bolts 10 .

[0043] S104. Pour high-strength cement mortar under the prefabricated bases 1 and 2, and adjust the installation angles of the prefabricated bases 1 and 2 to be consistent with the transverse slope of the bridge deck.

[0044] S105. Fix the water stop 7 and the water pipe 8 along the grooves on the sides of the prefabricated base 1 and 2.

[0045] S06. Fix the dustproof plates 5 on the top surfaces of the prefabricated bases 1 and 2 on both sides of the expansion joint.

[0046] S107 , fixing the buffer device 6 on the panels 3 and 4 along the horizontal contact surfaces of the bases 1 and 2 and the panels 3 and 4 .

[0047] S108, insert the standard section prefabricated panels 3 along the installation openings at both ends of the sealing section prefabricated base 2, and push the standard section prefabricated panels 3 to the designated position along the expansion joint direction, repeat this operation to complete the installation of the standard section prefabricated panels 3 at other positions.

[0048] S109: Place the sealing section prefabricated panel 4 in the sealing section prefabricated base 2 to complete the installation of all prefabricated panels and the "closed drawer type" installation process.

[0049] The disassembly method adopts the "open drawer" operation, which is opposite to the above installation steps. When replacing the bridge expansion joint device, it usually only involves the replacement of panels 3, 4 and the corresponding buffer device 6 and water stop 7. The disassembly of related parts is carried out in the reverse order of the installation method. Figure 13 As shown, the replacement process of the expansion joint device includes the following steps at most:

[0050] S201. Separate the prefabricated panels 4 and 3 in sequence along the expansion joint direction, and simultaneously pull out the buffer device 6 fixed on the prefabricated panels.

[0051] S202. Open the dustproof plate and remove the waterstop 7.

[0052] S203. Install a new water stop 7 and re-fix the dust plate 5.

[0053] S204 , installing new prefabricated panels 3 , 4 and corresponding buffer devices 6 in sequence.

[0054] Example 2:

[0055] like Figure 11As shown, compared with Example 1, the prefabricated bases 1 and 2 of this embodiment adopt a steel-concrete composite structure, a steel structure, or a cast steel structure. Since the bottom plates of bases 1 and 2 are steel structures, the fixing method of bases 1 and 2 is more flexible. Pre-embedded parts such as embedded steel plates, prefabricated steel bars, and pre-embedded steel sections can be directly welded to the bottom plates of bases 1 and 2, eliminating the need for pre-embedded steel bars in the beam body. Leveling with high-strength cement mortar is also easier. The size of the anchor should be specially designed according to the anchor strength requirements. The other component structures and installation and removal methods of this embodiment are the same as those of Example 1 and will not be described in detail here.

[0056] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. A bridge expansion joint device, characterized in that: The expansion joint device is arranged at the expansion joint of the bridge and is arranged along the entire length of the bridge in the transverse direction, and includes a prefabricated base and a prefabricated panel that match each other; The prefabricated base is fixed on the beam body (9) on both sides of the bridge expansion joint, and a fixing groove for accommodating the prefabricated panel is provided on the prefabricated base; the fixing groove of the prefabricated base and the cross section of the prefabricated panel along the length direction of the expansion joint are in a mutually interlocking shape, and the prefabricated panel is nested in the prefabricated base to achieve anchoring.

2. A bridge expansion joint device according to any one of claim 1, characterized in that: The expansion joint device is divided into multiple standard sections and sealing sections arranged at both ends of the bridge; The prefabricated base comprises a standard section prefabricated base (1) and a sealing section prefabricated base (2); The prefabricated panels include standard section prefabricated panels (3) and closed section prefabricated panels (4).

3. A bridge expansion joint device according to claim 2, characterized in that: The fixing groove of the sealing section prefabricated base (2) serves as an installation port, capable of accommodating the standard section prefabricated panel (3) and the sealing section prefabricated panel (4) to be installed from one side of the bridge deck; one end of the fixing groove of the sealing section prefabricated base (2) along the length direction of the expansion joint is connected to the standard section prefabricated base (1), and the other end is closed; the fixing groove of the sealing section prefabricated base (2) and the sealing section prefabricated panel (4) along the length direction of the expansion joint are in a mutually interlocking cross-section; The fixing groove of the standard section prefabricated base (1) is provided with a limiting structure for anchoring the standard section prefabricated panel (3) compared to the fixing groove of the sealing section prefabricated base (2), and the fixing groove passes through the standard section prefabricated base (1) along the length direction of the expansion joint; the fixing groove of the standard section prefabricated base (1) and the standard section prefabricated panel (3) are in a mutually interlocking cross-section along the length direction of the expansion joint.

4. A bridge expansion joint device according to any one of claims 1 to 3, characterized in that: The prefabricated panels adopt an improved modular comb plate structure. Multiple prefabricated panels are arranged on both sides of the expansion joint. The opposite sides of the prefabricated panels have comb structures that match each other. The prefabricated panels on both sides of the expansion joint are staggered.

5. The bridge expansion joint device according to claim 1, characterized in that: A buffer device (6) is provided between the horizontal contact surface of the prefabricated base and the prefabricated panel.

6. The bridge expansion joint device according to claim 1, characterized in that: The expansion joint device also includes a water stop (7) arranged between the prefabricated bases on both sides of the bridge expansion joint, the two ends of the water stop (7) are respectively fixed to the opposite sides of the prefabricated bases on both sides of the expansion joint, and a water pipe (8) is provided at the end of the water stop (7) away from the prefabricated panel; a dust plate (5) is provided above the water stop (7), and the dust plate (5) is fixed to the top surface of the prefabricated bases on both sides of the expansion joint.

7. The bridge expansion joint device according to claim 1, characterized in that: A high-strength cement mortar layer (11) is poured between the prefabricated base and the bridge beam (9), and the high-strength cement mortar layer (11) is used for leveling and fixing so that the bottom surface of the prefabricated base and the top surface of the fixing groove are consistent with the transverse slope of the bridge deck.

8. The bridge expansion joint device according to claim 1, characterized in that: Bolt holes are provided in the prefabricated bottom plate between the prefabricated base and the bridge beam body (9), and the prefabricated base is connected and fixed to the beam body (9) via pre-buried bolts (10).

9. The bridge expansion joint device according to claim 1, characterized in that: The prefabricated base adopts a steel-concrete composite structure, a steel structure or a cast steel structure, the bridge beam body (9) is provided with embedded parts, and the prefabricated base and the bridge beam body (9) are fixed by welding the embedded parts to the bottom plate of the prefabricated base.

10. A method for installing and disassembling a bridge expansion joint device according to any one of claims 1 to 9, characterized in that: The specific steps of the installation method include: Connecting the bottom plate of the prefabricated base to the bridge, leaving a gap between the prefabricated base and the top surface of the bridge beam (9); Pour high-strength cement mortar between the prefabricated base and the top surface of the bridge, adjust the prefabricated base to be level, and fix the prefabricated base to the beam body (9) on both sides of the bridge expansion joint; The two ends of the water stop (7) are respectively fixed to the opposite sides of the prefabricated base on both sides of the expansion joint; the dustproof plate (5) is fixed to the top surface of the prefabricated base on both sides of the expansion joint; fixing the buffer device (6) on the prefabricated panel; Slide the standard section prefabricated panels (3) into the installation openings at both ends of the sealing section prefabricated base (2) in sequence, and push them to the corresponding positions of the standard section prefabricated base (1); Installing the sealing section prefabricated panel (4) into the sealing section prefabricated base (2); The disassembly method specifically comprises the following steps: The sealing section prefabricated panel (4) and the standard section prefabricated panel (3) are sequentially separated along the expansion joint direction; the buffer device (6) fixed on the prefabricated panel is pulled out; the dustproof plate (5) is opened, and the water stop belt (7) is removed.

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