Bridge expansion joint device and construction process

Abstract

The application relates to the technical field of bridge construction, and particularly discloses a bridge expansion joint device and a construction process, which comprise an expansion joint mechanism, a temporary connecting mechanism and a permanent connecting mechanism; the expansion joint mechanism is connected to a pre-buried reinforcing bar group; the expansion joint mechanism is permanently installed; a first concrete layer is poured on the top of a base plate and covers the expansion joint mechanism; the temporary connecting mechanism is connected to the expansion joint mechanism; a lower asphalt layer is paved on the top of the first concrete layer and covers the temporary connecting mechanism, so as to form a temporary road; after the temporary road is opened to traffic, the lower asphalt layer covering the temporary connecting mechanism is removed, and the temporary connecting mechanism is removed from the expansion joint mechanism; the permanent connecting mechanism is connected to the expansion joint mechanism; an upper asphalt layer is paved on the top of the lower asphalt layer; and a second concrete layer is poured on the permanent connecting mechanism; the bridge expansion joint device and the construction process do not need to remove the expansion joint mechanism, time and labor are saved, and the quality of the road is improved.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, specifically to a bridge expansion joint device and its construction process. Background Technology

[0002] Bridge expansion joints are key components of bridge structures, allowing bridges to expand and contract freely under conditions of temperature changes, load application, and concrete shrinkage, thereby ensuring the safety and stability of the bridge. These joints typically consist of side beams, middle beams, supporting crossbeams, displacement control boxes, pressure bearings, clamping bearings, anchoring components, and sealing rubber strips. They can accommodate both longitudinal and lateral displacements of the bridge, while also bearing vehicle loads and preventing rainwater and debris from seeping in. Their design and installation must strictly adhere to relevant standards to ensure the normal operation of the bridge and traffic safety.

[0003] Chinese patent document CN113914209B discloses a bridge expansion joint device and construction method, including sliding parts, multiple sliding parts respectively disposed on opposite sides of the expansion joint; fixing parts, multiple fixing parts respectively disposed at both ends of the expansion joint along its length to clamp each sliding part; and a waterstop strip disposed in the expansion joint, with opposite sides of the waterstop strip disposed on each sliding part and each fixing part; the sliding part includes: an anchoring base, which is pre-embedded in the concrete base on both sides of the expansion joint on the bridge, the anchoring... The base has an internal thread; a first support column has a threaded portion near its first end and a spherical portion at its second end, and a limiting portion is provided at one end of the threaded portion of the first support column; a first spring washer is able to be fitted onto the threaded portion of the first support column and is used to be positioned between the limiting portion and the anchoring base; a sliding panel is used to be installed on a plurality of the first support columns, and a groove with an arc-shaped cross-section is provided on the bottom side of the sliding panel, and the arc length of the groove cross-section is at least three-quarters of the circumference.

[0004] However, the aforementioned patent documents also have the following shortcomings: When expanding a highway, before asphalt paving is carried out after the highway bridge deck is paved, in order to facilitate the passage of construction vehicles and protect the pre-embedded steel bars in the groove, it is generally necessary to first lay anti-falling steel plates and then backfill plain concrete. After the bottom or middle layer of asphalt concrete is laid and before temporary traffic is prepared, the filler is removed and temporary expansion joints are installed. Subsequently, before the asphalt surface layer is laid and before the official opening to traffic is prepared, it is necessary to first remove the asphalt on the temporary expansion joint and remove the concrete in the temporary expansion joint and the expansion joint groove (due to the high strength of concrete, the removal process is often carried out using a small blasting machine). Then, the pre-embedded steel bars and grooves are arranged, and the permanent expansion joint is leveled and connected to the pre-embedded steel bars. The whole process is time-consuming and labor-intensive, and it is easy to affect the quality of the expanded highway within the limited construction period. Summary of the Invention

[0005] This invention provides a bridge expansion joint device and construction process, aiming to solve the problem in related technologies that require the removal of temporary expansion joints and the installation of permanent expansion joints, which is time-consuming and labor-intensive, and can easily affect the quality of the expanded bridge deck within the limited construction period.

[0006] The bridge expansion joint device of the present invention includes a base plate, a first concrete layer, a lower asphalt layer, an upper asphalt layer, a pre-embedded steel reinforcement group, and a second concrete layer. The pre-embedded steel reinforcement group is connected to the base plate. The device also includes an expansion joint mechanism, a temporary connection mechanism, and a permanent connection mechanism. The expansion joint mechanism is connected to the pre-embedded steel reinforcement group and is permanently installed. The first concrete layer is poured on top of the base plate and covers the expansion joint mechanism. The temporary connection mechanism is connected to the expansion joint mechanism. The lower asphalt layer is laid on top of the first concrete layer and covers the temporary connection mechanism to form a temporary road for temporary traffic. After the temporary traffic is completed, the lower asphalt layer covering the temporary connection mechanism is removed, and the temporary connection mechanism is removed from the expansion joint mechanism. After the temporary connection mechanism is removed from the expansion joint mechanism, the permanent connection mechanism can be connected to the expansion joint mechanism. The upper asphalt layer is laid on top of the lower asphalt layer, and the second concrete layer is poured on the permanent connection mechanism.

[0007] Beneficial effects: When installing bridge expansion joint devices, first install the pre-embedded steel reinforcement group on the top of the base plate. Then connect the expansion joint mechanism to two adjacent pre-embedded steel reinforcement groups on the top of two adjacent base plates. Next, pour the first layer of concrete on the top of the base plate and cover the expansion joint mechanism and the pre-embedded steel reinforcement group. Then cure the first layer of concrete. After curing, connect the temporary connection mechanism to the expansion joint mechanism. Then spread the lower asphalt layer on top of the first layer of concrete and cover it with the temporary connection mechanism. Then cure the lower asphalt layer. After the lower asphalt layer is cured, remove the public works equipment at this location. To address road obstruction and facilitate temporary traffic flow, after the temporary opening is completed, the lower asphalt layer covering the temporary connection mechanism is first removed. Then, a permanent connection mechanism of appropriate height is selected based on the sum of the thickness of the lower asphalt layer and the required upper asphalt layer. Next, the selected permanent connection mechanism is connected to the expansion joint mechanism. Then, the upper asphalt layer is laid on top of the lower asphalt layer, and a second concrete layer is poured at the permanent connection mechanism. This eliminates the need to remove the expansion joint mechanism from the first concrete layer, saving time, improving work efficiency, providing ample time for the curing of the first concrete layer, and improving the quality of the highway.

[0008] Preferably, each of the substrates is provided with two pre-embedded steel bars connected to the top, with the two pre-embedded steel bars connected to the top two ends of the substrate respectively.

[0009] Its effect is that the pre-embedded steel reinforcement group facilitates the installation and fixation of the expansion joint mechanism.

[0010] Preferably, the expansion joint mechanism includes a waterstop and two fixing members. The waterstop is connected between the two fixing members, and the two fixing members are respectively connected to two pre-embedded steel bar groups that are close to each other on the top of two adjacent base plates.

[0011] Its effect is that the waterstop can block the gap between two adjacent substrates, preventing solid waste from falling through the gap between the two substrates during construction and improving the safety of construction.

[0012] Preferably, the fixing component includes a steel section, an anchor plate, and a reinforcing plate. A waterstop is connected between the steel sections within the two fixing components. The steel section is connected to the pre-embedded steel reinforcement group. The anchor plate is connected to the steel section. The reinforcing plate is connected between the steel section and the anchor plate.

[0013] Its effect is that the connection strength between the steel section and the anchor plate can be enhanced by the reinforcing plate.

[0014] Preferably, the fastener further includes an internally threaded sleeve and a bolt. The internally threaded sleeve is connected to the anchor plate, with the opening of the internally threaded sleeve facing upwards, and the bolt is threadedly connected to the top of the internally threaded sleeve.

[0015] Its effect is that the fit between the internal threaded sleeve and the bolt facilitates the connection of temporary or permanent connection mechanisms to the expansion joint mechanism.

[0016] Preferably, the temporary connection mechanism includes a waterstop three and two connector two. The two connector two can be connected to two fixing parts respectively through the cooperation between the internal threaded sleeve and the bolt. The waterstop three is connected between the two connector two.

[0017] Preferably, the second connecting member includes a steel section three, an anchor plate three, and a connecting plate two. The anchor plate three is connected to the steel section three, the waterstop three is connected between the two steel sections three within the second connecting member, and the connecting plate two is connected to the anchor plate three. The connecting plate two is provided with mounting holes, and bolts can pass through the mounting holes to fix the connecting plate two to the internal threaded sleeve.

[0018] Preferably, the temporary connection mechanism further includes a sealing cap, which is fitted onto the top of the bolt.

[0019] Its effect is that by placing the sealing cap on the top of the bolt, the top of the bolt is covered by the sealing cap when the asphalt layer is laid later, preventing asphalt from adhering to the bolt, so that the connecting part can be removed from the fastener later.

[0020] Preferably, the permanent connection mechanism includes a second waterstop and two first connectors. The second waterstop is connected between the two first connectors. The first connector includes a second steel section, a second anchor plate, and a first connecting plate. The second anchor plate is connected to the second steel section, and the first connecting plate is connected to the second anchor plate. The first connecting plate is provided with mounting holes, through which bolts can pass to fix the first connecting plate to the internal threaded sleeve.

[0021] The present invention also provides a construction process for bridge expansion joints, which includes the following steps:

[0022] S1: Install the pre-embedded steel reinforcement assembly on the base plate;

[0023] S2: Connect the expansion joint mechanism to the pre-embedded steel reinforcement group;

[0024] S3: Pour the concrete layer on top of the substrate and cover the expansion joint mechanism and the pre-embedded steel reinforcement group, and then cure the concrete layer.

[0025] S4: After the concrete layer 1 is cured, the temporary connection mechanism is connected to the expansion joint mechanism, and the lower asphalt layer is laid on the concrete layer 1. After the lower asphalt layer is cured, a temporary road is formed.

[0026] S5: Remove the asphalt layer covering the temporary connection mechanism and remove the temporary connection mechanism from the expansion joint mechanism, and then connect the permanent connection mechanism to the expansion joint mechanism;

[0027] S6: Lay the upper asphalt layer on top of the lower asphalt layer and pour the second concrete layer on the permanent connection mechanism.

[0028] Beneficial effects: After connecting the expansion joint mechanism to two pre-embedded steel bars close to each other on the top of two adjacent base plates to form a permanent installation, a temporary road can be formed after connecting the temporary connection mechanism to the expansion joint mechanism and laying the lower asphalt layer, allowing various construction units to work together. After the temporary road is opened to traffic, the lower asphalt layer covering the temporary connection mechanism is removed, and the temporary connection mechanism is disassembled from the expansion joint mechanism. Then, the permanent connection mechanism is connected to the expansion joint mechanism to form a permanent expansion joint device. Finally, the upper asphalt layer is laid on top of the lower asphalt layer, and a second concrete layer is poured at the permanent connection mechanism. It is not necessary to remove the expansion joint mechanism from the first concrete layer, saving time, improving work efficiency, providing sufficient time for the curing of the first concrete layer, and improving the quality of the road.

[0029] The beneficial effects of this invention are:

[0030] 1. Compared to existing technologies that involve removing the expansion joint mechanism within the first concrete layer and installing a permanent expansion joint device, the expansion joint mechanism in this invention is permanently installed, eliminating the need for removal from the first concrete layer. This saves time, improves work efficiency, provides ample time for the curing of the first concrete layer, and enhances the quality of the highway. Furthermore, in existing technologies, removing the expansion joint mechanism within the first concrete layer can easily damage the embedded steel reinforcement, leading to the need for rebar installation. In this invention, not removing the expansion joint mechanism within the first concrete layer avoids damage to the embedded steel reinforcement, eliminates the need for rebar installation, and reduces the highway manufacturing cost.

[0031] 2. Compared to existing technologies, which typically require laying anti-fall steel plates before backfilling plain concrete after the bridge deck pavement is completed and before asphalt paving, in order to facilitate the passage of construction vehicles and protect the pre-embedded steel bars in the trench, and then removing the filler and installing temporary expansion joints after the bottom or middle layer of asphalt concrete is laid and before temporary traffic is opened, this invention, through a permanent expansion joint mechanism, eliminates the need to backfill plain concrete in the trench to facilitate the passage of construction vehicles, thus avoiding the generation of solid waste when removing plain concrete later. It also reduces the use of large machinery and, to a certain extent, reduces carbon emissions, noise and dust pollution. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the main structure after the invention is completed.

[0033] Figure 2 This is a schematic diagram of the main structure of the temporary road opening of the present invention.

[0034] Figure 3 This is a schematic diagram of the front cross-sectional structure of the present invention.

[0035] Figure 4 This is a front view structural schematic diagram of the expansion joint mechanism of the present invention.

[0036] Figure 5 This is a three-dimensional structural diagram of the expansion joint mechanism of the present invention.

[0037] Figure 6 This is a front view structural diagram of the expansion joint mechanism and temporary connection mechanism of the present invention.

[0038] Figure 7 This is a three-dimensional structural diagram of the expansion joint mechanism and temporary connection mechanism of the present invention.

[0039] Figure 8 This is a front view structural diagram of the expansion joint mechanism and permanent connection mechanism of the present invention.

[0040] Figure 9 This is a three-dimensional structural diagram of the permanent connection mechanism of the present invention.

[0041] Figure label:

[0042] 1. Substrate; 2. Concrete layer one; 3. Lower asphalt layer; 4. Upper asphalt layer; 5. Embedded steel reinforcement group; 6. Expansion joint mechanism; 61. Fixing component; 611. Steel section one; 612. Anchor plate one; 613. Reinforcing plate; 614. Internal threaded sleeve; 615. Bolt; 62. Waterstop one; 7. Permanent connection mechanism; 71. Connecting component one; 711. Steel section two; 712. Anchor plate two; 713. Connecting plate one; 72. Waterstop two; 8. Temporary connection mechanism; 81. Connecting component two; 811. Steel section three; 812. Anchor plate three; 813. Connecting plate two; 82. Waterstop three; 83. Sealing cap; 9. Concrete layer two. Detailed Implementation

[0043] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0044] like Figures 1 to 9As shown, the bridge expansion joint device of the present invention includes a base plate 1, a first concrete layer 2, a lower asphalt layer 3, an upper asphalt layer 4, a pre-embedded steel reinforcement group 5, an expansion joint mechanism 6, a permanent connection mechanism 7, a temporary connection mechanism 8, and a second concrete layer 9. The base plate 1 is a precast slab made of steel bars and concrete. The pre-embedded steel reinforcement group 5 is connected to the top of the base plate 1. Each base plate 1 has two pre-embedded steel reinforcement groups 5 connected to its top, and the two pre-embedded steel reinforcement groups 5 are respectively connected to the top two ends of the base plate 1. The expansion joint mechanism 6 is connected to two adjacent pre-embedded steel reinforcement groups 5 between two adjacent base plates 1, that is, both ends of the base plate 1 are provided with the expansion joint mechanism 6. The first concrete layer 2 is poured on the top of the base plate 1. At this time, the expansion joint mechanism 6 can protect the ends of the first concrete layer 2 to avoid damage to the ends when vehicles pass over the first concrete layer 2. The expansion joint mechanism 6 can also protect the groove between two adjacent first concrete layers 2. The temporary connection mechanism 8 is connected to the expansion joint mechanism 6. After the concrete layer 2 is cured, the lower asphalt layer 3 is laid on top of the concrete layer 2 and covers the temporary connection mechanism 8 to form a temporary road. The temporary connection mechanism 8 can protect the end of the lower asphalt layer 3 when it is temporarily opened to traffic after the lower asphalt layer 3 is cured. When the upper asphalt layer 4 is laid on the lower asphalt layer 3, the workers need to first remove the part of the lower asphalt layer 3 covering the temporary connection mechanism 8, then remove the temporary connection mechanism 8 from the expansion joint mechanism 6, then connect the permanent connection mechanism 7 to the expansion joint mechanism 6, and finally lay the upper asphalt layer 4 on the lower asphalt layer 3 and pour the second concrete layer 9 on the permanent connection mechanism 7. It is not necessary to remove the expansion joint mechanism 6 from the concrete layer 2, which saves time and labor and provides enough time for the curing of the concrete layer 2 to improve the quality of the road. The second concrete layer 9 is ultra-high performance concrete.

[0045] When installing the bridge expansion joint device, first install the pre-embedded steel reinforcement group 5 on the top of the base plate 1, with two pre-embedded steel reinforcement groups 5 on the top of each base plate 1. The two pre-embedded steel reinforcement groups 5 are respectively set at both ends of the base plate 1. Then, connect the expansion joint mechanism 6 to the two pre-embedded steel reinforcement groups 5 that are close to each other on the top of two adjacent base plates 1. Next, pour the concrete layer 2 on the top of the base plate 1, covering the expansion joint mechanism 6 and the pre-embedded steel reinforcement groups 5. Then, cure the concrete layer 2. After the concrete layer 2 has been cured, connect the temporary connection mechanism 8 to the expansion joint mechanism 6. Then, spread the lower asphalt layer 3 on the concrete. The top of layer 2 is covered with a temporary connecting mechanism 8, and then the lower asphalt layer 3 is cured. After the lower asphalt layer 3 is cured, the obstruction to the road is removed to allow temporary traffic to be opened, so as to facilitate the collaborative work of the construction units. After the temporary traffic is opened, the lower asphalt layer 3 covering the temporary connecting mechanism 8 is first removed. Then, a permanent connecting mechanism 7 of the appropriate height is selected according to the sum of the thickness of the lower asphalt layer 3 and the required upper asphalt layer 4. The selected permanent connecting mechanism 7 is then connected to the expansion joint mechanism 6. The upper asphalt layer 4 is then laid on top of the lower asphalt layer 3, and a concrete layer 9 is poured at the permanent connecting mechanism 7.

[0046] Compared to the existing technology that involves removing the expansion joint mechanism 6 within the concrete layer 2 and installing a permanent expansion joint device, the expansion joint mechanism 6 in this invention is permanently installed and does not need to be removed from the concrete layer 2. This saves time, improves work efficiency, provides sufficient time for the curing of the concrete layer 2, and improves the quality of the highway. At the same time, it avoids the need for rebar installation due to damage to the pre-embedded steel reinforcement group 5 when removing the expansion joint mechanism 6, thereby reducing the manufacturing cost of the highway.

[0047] Compared to existing technologies, which typically require laying anti-fall steel plates before backfilling with plain concrete after the bridge deck is paved and before asphalt is laid to facilitate the passage of construction vehicles and protect the pre-embedded steel bars in the trench, and then removing the filler and installing temporary expansion joints after the bottom or middle layer of asphalt concrete is laid and before temporary traffic is opened, this invention, through a permanent expansion joint mechanism 6, eliminates the need to backfill plain concrete in the trench to facilitate the passage of construction vehicles, thus avoiding the generation of solid waste when removing the plain concrete later. It also reduces the use of large machinery and, to a certain extent, reduces carbon emissions, noise, and dust pollution.

[0048] like Figure 1 and Figure 3 , Figure 4 and Figure 5As shown, the expansion joint mechanism 6 includes a fixing member 61 and a waterstop 62. Two fixing members 61 are provided, each connected to two pre-embedded steel reinforcement groups 5 located close to each other on the top of two adjacent base plates 1. The waterstop 62 is installed between the two fixing members 61. The waterstop 62 is a rubber strip and can block the gap between two adjacent base plates 1 to prevent solid waste from falling through the gap during construction, thus improving safety. The fixing member 61 includes a steel profile 611, an anchor plate 612, a reinforcing plate 613, an internally threaded sleeve 614, and bolts 615. The waterstop 62... 62 is connected between two fixed members 61, the steel section 611 is connected to the pre-embedded steel reinforcement group 5, the anchor plate 612 is connected to the steel section 611, the reinforcing plate 613 is connected between the steel section 611 and the anchor plate 612, the reinforcing plate 613 can enhance the connection strength between the steel section 611 and the anchor plate 612, the internal threaded sleeve 614 is connected to the anchor plate 612, the internal threaded sleeve 614 has its opening facing upward, the bolt 615 is threadedly connected to the top of the internal threaded sleeve 614, the cooperation between the internal threaded sleeve 614 and the bolt 615 facilitates the connection of the temporary connection mechanism 8 or the permanent connection mechanism 7 to the expansion joint mechanism 6.

[0049] like Figure 2 , Figure 5 and Figure 7 As shown, the temporary connection mechanism 8 includes a second connector 81, a third waterstop 82, and a sealing cap 83. There are two second connectors 81, which can be connected to two fixed members 61 respectively through the cooperation between the internal threaded sleeve 614 and the bolt 615. The third waterstop 82 is connected between the two second connectors 81. The sealing cap 83 is installed on the second connector 81 and is sleeved on the top of the bolt 615. The sealing cap 83 can cover the bolt 615 to prevent some asphalt in the lower asphalt layer 3 from adhering to the bolt 615, so that the permanent connection mechanism 7 can be connected to the expansion joint mechanism 6 after the temporary connection mechanism 8 is removed from the expansion joint mechanism 6.

[0050] Continue to refer to Figure 2 , Figure 5 and Figure 7As shown, connector 2 81 includes steel section 3 811, anchor plate 3 812 and connecting plate 2 813. Anchor plate 3 812 is connected to steel section 3 811. Waterstop 3 82 is connected between steel section 3 811 in the two connectors 2 81. Connecting plate 2 813 is connected to anchor plate 3 812. Connecting plate 2 813 is provided with mounting holes. Bolt 615 can pass through the mounting holes and fix connecting plate 2 813 to internal thread sleeve 614, thereby completing the fixed connection between connector 2 81 and fixing member 61. After the connection is completed, sealing cap 83 is put on the top of bolt 615 so that when laying the lower asphalt layer 3 later, the top of bolt 615 can be covered by sealing cap 83 to prevent asphalt from adhering to bolt 615, so that connector 2 81 can be removed from fixing member 61 later.

[0051] like Figure 1 , Figure 8 and Figure 9 As shown, the permanent connection mechanism 7 includes a first connector 71 and a second waterstop 72. There are two first connectors 71, and the second waterstop 72 is connected between the two first connectors 71. After the second connector 71 is removed from the fixing member 61, the first connector 71 can be connected to the fixing member 61 so that the permanent connection mechanism 7 and the expansion joint mechanism 6 form a permanent expansion joint device. The first connector 71 includes a second profile steel 711, a second anchor plate 712, and a first connecting plate 713. The second waterstop 72 is connected between the second profile steel 711 on the two first connectors 71. The second anchor plate 712 is connected to the second profile steel 711. The first connecting plate 713 is connected to the second anchor plate 712. The first connecting plate 713 is provided with mounting holes, and bolts 615 can pass through the mounting holes so that the first connecting plate 713 is fixed on the internal threaded sleeve 614, thereby fixing the first connector 71 to the fixing member 61.

[0052] The mounting holes on both the first connecting plate 713 and the second connecting plate 813 are elongated holes so that the temporary connecting mechanism 8 or the permanent connecting mechanism 7 can be finely adjusted back and forth when connected to the expansion joint mechanism 6.

[0053] Working principle:

[0054] The pre-embedded steel bar group 5 is connected to the top of the base plate 1. The number of pre-embedded steel bar groups 5 on the top of each base plate 1 is set to two, and the two pre-embedded steel bar groups 5 are respectively connected to the two ends of the same base plate 1.

[0055] The expansion joint mechanism 6 is connected to two pre-embedded steel bar groups 5 that are close to each other on the top of two adjacent base plates 1.

[0056] The concrete layer 2 is poured on top of the base plate 1 and covers the expansion joint mechanism 6 and the pre-embedded steel bar group 5. The concrete layer 2 is then cured. There is no need to backfill plain concrete in the groove to facilitate the passage of construction vehicles, thus avoiding the generation of solid waste when the plain concrete is removed later. At the same time, the use of large machinery is reduced, which reduces carbon emissions, noise and dust pollution to a certain extent.

[0057] After the concrete layer 2 has been cured, the two connectors 81 on the temporary connection mechanism 8 are placed on top of the two fixing parts 61 inside the expansion joint mechanism 6. Then, the bolt 615 is passed through the mounting hole on the connecting plate 813 inside the connector 81 and the bolt 615 is threadedly connected to the internal threaded sleeve 614. At the same time, the sealing cap 83 is placed on the top of the bolt 615 and the bottom of the sealing cap 83 is in contact with the connecting plate 813, thereby fixing the connector 81 and the fixing part 61 to complete the connection between the expansion joint mechanism 6 and the temporary connection mechanism 8.

[0058] The lower asphalt layer 3 is laid on top of the concrete layer 2, and the lower asphalt layer 3 covers the temporary connection mechanism 8, and then the lower asphalt layer 3 is cured.

[0059] After the lower asphalt layer 3 is cured, the obstruction to the road will be removed to allow temporary traffic and facilitate collaborative work among the construction units.

[0060] After the temporary opening to traffic is completed, the lower asphalt layer 3 covering the temporary connection mechanism 8 is first removed, and the sealing cap 83 is removed from the top of the bolt 615. Then, the bolt 615 is turned to disconnect the temporary connection mechanism 8 from the expansion joint mechanism 6, and the temporary connection mechanism 8 is removed from the expansion joint mechanism 6.

[0061] Select a permanent connection mechanism 7 of appropriate height based on the sum of the thicknesses of the lower asphalt layer 3 and the required upper asphalt layer 4. Then, place the two connectors 71 in the permanent connection mechanism 7 onto the two fixing members 61 in the expansion joint mechanism 6. Subsequently, pass the bolt 615 through the mounting hole on the connecting plate 713 inside the connector 71 and thread the bolt 615 with the internal threaded sleeve 614 so that the two connectors 71 are fixedly connected to the two fixing members 61, thereby completing the connection between the permanent connection mechanism 7 and the expansion joint mechanism 6 to form a permanent expansion joint device.

[0062] The present invention also provides a construction process for bridge expansion joints, which includes the following steps:

[0063] S1: Install the pre-embedded steel bar group 5 on the base plate 1;

[0064] Specifically, two pre-embedded steel bar groups 5 are installed on the top of each substrate 1, and the two pre-embedded steel bar groups 5 are respectively installed at both ends of the substrate 1.

[0065] S2: Connect the expansion joint mechanism 6 to the pre-embedded steel reinforcement group 5;

[0066] Specifically, the two fixing members 61 in the expansion joint mechanism 6 are respectively connected to the two pre-embedded steel bar groups 5 that are close to each other on the top of the two adjacent base plates 1;

[0067] S3: Pour concrete layer 2 on top of base plate 1 and cover it with expansion joint mechanism 6 and pre-embedded steel bar group 5, and then cure concrete layer 2.

[0068] S4: After the concrete layer 12 is cured, the temporary connection mechanism 8 is connected to the expansion joint mechanism 6, and the lower asphalt layer 3 is laid on the concrete layer 12. After the lower asphalt layer 3 is cured, a temporary road is formed.

[0069] Specifically, the two connecting parts 81 on the temporary connecting mechanism 8 are placed on top of the two fixing parts 61 inside the expansion joint mechanism 6. Then, the bolt 615 is passed through the mounting hole on the connecting plate 813 inside the connecting part 81 and the bolt 615 is threadedly connected to the internal threaded sleeve 614. At the same time, the sealing cover 83 is placed on the top of the bolt 615 and the bottom of the sealing cover 83 is in contact with the connecting plate 813, thereby fixing the connecting part 81 and the fixing part 61 to complete the connection between the expansion joint mechanism 6 and the temporary connecting mechanism 8.

[0070] The lower asphalt layer 3 is laid on the concrete layer 2. After the lower asphalt layer 3 is cured, a temporary road is formed for the collaborative work of various construction units.

[0071] S5: Remove the lower asphalt layer 3 covering the temporary connection mechanism 8 and remove the temporary connection mechanism 8 from the expansion joint mechanism 6, and then connect the permanent connection mechanism 7 to the expansion joint mechanism 6.

[0072] Specifically, the following steps are taken: remove the lower asphalt layer 3 covering the temporary connection mechanism 8, remove the sealing cap 83 from the top of the bolt 615, then tighten the bolt 615 to disconnect the temporary connection mechanism 8 from the expansion joint mechanism 6, and remove the temporary connection mechanism 8 from the expansion joint mechanism 6.

[0073] Select a permanent connection mechanism 7 of appropriate height according to the sum of the thickness of the lower asphalt layer 3 and the required upper asphalt layer 4. Then, place the two connectors 71 in the permanent connection mechanism 7 onto the two fixings 61 in the expansion joint mechanism 6. Then, pass the bolt 615 through the mounting hole on the connecting plate 713 in the connector 71 and thread the bolt 615 with the internal thread sleeve 614 so that the two connectors 71 are fixedly connected to the two fixings 61, thereby completing the connection between the permanent connection mechanism 7 and the expansion joint mechanism 6 to form a permanent expansion joint device.

[0074] S6: Lay the upper asphalt layer 4 on top of the lower asphalt layer 3, and pour the concrete layer 2 9 onto the permanent connection mechanism 7.

[0075] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A bridge expansion joint device comprising a base plate (1), a concrete layer I (2), a lower asphalt layer (3), an upper asphalt layer (4), a pre-embedded steel bar group (5) and a concrete layer II (9), the pre-embedded steel bar group (5) being connected to the base plate (1), characterized in that, The expansion joint mechanism (6), the temporary connecting mechanism (8) and the permanent connecting mechanism (7) are further included, the expansion joint mechanism (6) is connected to the embedded steel bar group (5), the expansion joint mechanism (6) is permanently installed, the concrete layer one (2) is poured on the top of the base plate (1) and covers the expansion joint mechanism (6), the temporary connecting mechanism (8) is connected to the expansion joint mechanism (6), the lower asphalt layer (3) is paved on the top of the concrete layer one (2) and covers the temporary connecting mechanism (8), so as to form a temporary road and be temporarily opened to traffic, after the temporary opening to traffic is completed, the lower asphalt layer (3) covering the temporary connecting mechanism (8) is removed, and the temporary connecting mechanism (8) is removed from the expansion joint mechanism (6), after the temporary connecting mechanism (8) is removed from the expansion joint mechanism (6), the permanent connecting mechanism (7) can be connected to the expansion joint mechanism (6), the upper asphalt layer (4) is paved on the top of the lower asphalt layer (3), and the concrete layer two (9) is poured on the permanent connecting mechanism (7); The embedded steel bar group (5) connected to the top of each base plate (1) is provided with two, and the two embedded steel bar groups (5) are connected to the top of the base plate (1) at two ends, respectively. The expansion joint mechanism (6) includes a water stop belt one (62) and two fixing pieces (61), the water stop belt one (62) is connected between the two fixing pieces (61), and the two fixing pieces (61) are connected to the two embedded steel bar groups (5) on the top of the adjacent two base plates (1) and close to each other, respectively.

2. The bridge joint device according to claim 1, characterized in that The fixing piece (61) includes a profile steel one (611), an anchor plate one (612) and a reinforcing plate (613), the water stop belt one (62) is connected between the profile steel ones (611) in the two fixing pieces (61), the profile steel one (611) is connected to the embedded steel bar group (5), the anchor plate one (612) is connected to the profile steel one (611), and the reinforcing plate (613) is connected between the profile steel one (611) and the anchor plate one (612).

3. The bridge joint device according to claim 2, characterized in that The fixing piece (61) further includes an internally threaded sleeve (614) and a bolt (615), the internally threaded sleeve (614) is connected to the anchor plate one (612), the internally threaded sleeve (614) is upwardly open, and the bolt (615) is threadedly connected to the top of the internally threaded sleeve (614).

4. The bridge joint device according to claim 3, characterized in that The temporary connecting mechanism (8) includes a water stop belt three (82) and two connecting pieces two (81), the two connecting pieces two (81) can be connected to the two fixing pieces (61) through cooperation between the internally threaded sleeve (614) and the bolt (615), and the water stop belt three (82) is connected between the two connecting pieces two (81).

5. The bridge joint device according to claim 4, characterized in that The connecting piece two (81) includes a profile steel three (811), an anchor plate three (812) and a connecting plate two (813), the anchor plate three (812) is connected to the profile steel three (811), the water stop belt three (82) is connected between the profile steel threes (811) in the two connecting pieces two (81), the connecting plate two (813) is connected to the anchor plate three (812), the connecting plate two (813) is provided with a mounting hole, the bolt (615) can pass through the mounting hole and fix the connecting plate two (813) to the internally threaded sleeve (614).

6. The bridge joint device according to claim 5, wherein The temporary connecting mechanism (8) further comprises a sealing cover (83) sleeved on the top end of the bolt (615).

7. The bridge joint device of claim 3, wherein The permanent connecting mechanism (7) comprises a water stop two (72) and two connecting pieces one (71), the water stop two (72) is connected between the two connecting pieces one (71), the connecting piece one (71) comprises a profile steel two (711), an anchor plate two (712) and a connecting plate one (713), the anchor plate two (712) is connected on the profile steel two (711), the connecting plate one (713) is connected on the anchor plate two (712), the connecting plate one (713) is provided with a mounting hole, the bolt (615) can pass through the mounting hole, so that the connecting plate one (713) is fixed on the inner threaded sleeve (614).

8. A process for constructing a bridge expansion joint, characterized by, The bridge expansion joint device according to any one of claims 1-7, comprising the following steps: S1: installing the embedded steel bar group (5) on the base plate (1); S2: connecting the expansion joint mechanism (6) on the embedded steel bar group (5); S3: pouring the concrete layer one (2) on the top of the base plate (1) and covering the expansion joint mechanism (6) and the embedded steel bar group (5), and then curing the concrete layer one (2); S4: after the curing of the concrete layer one (2) is completed, connecting the temporary connecting mechanism (8) on the expansion joint mechanism (6), and paving the lower asphalt layer (3) on the concrete layer one (2), and forming a temporary road after the curing of the lower asphalt layer (3) is completed; S5: removing the lower asphalt layer (3) covering the temporary connecting mechanism (8), and removing the temporary connecting mechanism (8) from the expansion joint mechanism (6), and then connecting the permanent connecting mechanism (7) on the expansion joint mechanism (6); S6: paving the upper asphalt layer (4) on the top of the lower asphalt layer (3), and pouring the concrete layer two (9) on the permanent connecting mechanism (7).

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