A connection device and construction method for widening an old bridge

Abstract

The present invention belongs to the technical field of bridge engineering, and discloses a connection device and construction method for widening an old bridge, including a connection component, a fixing component and a telescopic component, wherein the connection component includes an upper connection plate, a lower connection plate, a waist connection plate and a connection rib, wherein the waist connection plate cooperates with the connection rib through an internal hole, and the fixing component includes an upper fixing plate hinged on the side of the upper connection plate and a lower fixing plate hinged on the side of the lower connection plate, wherein the upper fixing plate and the lower fixing plate are telescopic. The present invention connects a new bridge with an old bridge through a connection component, thereby realizing rapid docking and fixing between the new bridge and the old bridge, and the connection template is used as a connection piece for connecting the new bridge with the old bridge after casting, and does not need to be removed.

Description

Technical Field

[0001] The invention relates to the technical field of bridge engineering, in particular to a connecting device and a construction method for widening an old bridge. Background Art

[0002] At present, with the increasing number of renovation projects for widening and lengthening old bridges, quality problems such as joint stretching and misalignment often occur at the joints between old and new bridges, causing the road surface to bulge or collapse at the contact point between the old and new bridges, seriously affecting the appearance of the bridge and driving safety. The traditional method of widening and lengthening bridges uses the same type of prefabricated components or cast-in-place components to splice with the original structure to form a whole. Although the traditional method is simple and easy to use, the actual construction cost is high and the construction time is long.

[0003] Patent No. CN213681783U discloses a widening structure for old bridges suitable for highway bridges, which realizes the separation of the new bridge and the old bridge in terms of force, forms an independent force system, and has clear force, thus avoiding the transmission and influence of bridge diseases between the new bridge and the old bridge, and effectively prolonging the service life of the bridge. However, this technical solution also includes at least the following problems:

[0004] Question 1: The traditional casting formwork of the connection device between the new and old bridges requires multiple fixing parts to fix the casting formwork at the connection between the new and old bridges. After the casting is completed, the casting formwork needs to be removed. The installation and removal process is cumbersome, and it cannot be used as a connection between the new bridge and the old bridge to ensure the tightness of the connection between the new bridge and the old bridge. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a connection device and a construction method for widening an old bridge to solve the technical problem mentioned in the background technology.

[0006] In order to solve the above technical problems, the present invention proposes a connection device for widening an old bridge, comprising a connection component, wherein the connection component comprises a lower connection plate, an upper connection plate and a waist connection plate, wherein the lower connection plate and the upper connection plate are parallel, and a through hole is opened inside the waist connection plate, and a connecting rib is installed in the through hole;

[0007] Also included is a fixing component, the fixing component including a lower fixing screw and an upper fixing screw;

[0008] An upper fixing plate is hingedly connected to one side of the upper connecting plate close to the waist connecting plate, and a pouring port is provided on the upper fixing plate.

[0009] Furthermore, the upper fixing plate is connected to an upper fixing piece on a side away from the waist connecting plate, the lower connecting plate is hinged to a lower fixing plate on a side close to the waist connecting plate, and the lower fixing plate is connected to a lower fixing piece on a side away from the waist connecting plate.

[0010] Furthermore, it also includes a connecting piece, which includes an upper connecting piece and a lower connecting piece. The upper connecting piece is installed inside the upper fixing plate, and the lower connecting piece is installed inside the lower fixing plate.

[0011] Furthermore, both the upper connecting member and the lower connecting member are retractable.

[0012] Furthermore, a spring is fixedly installed inside the connecting piece, and the spring is fixedly connected to both ends of the connecting piece. An outer sleeve is fixedly installed at one end of the connecting piece, and an inner sleeve is fixedly installed at the other end of the connecting piece. The outer sleeve is sleeved on the outside of the inner sleeve, and the inner sleeve is sleeved on the outside of the spring. Screws are installed on the side of the connecting piece, and an outer shell is installed on the outside of the connecting piece.

[0013] Furthermore, it also includes an old bridge part and a new bridge part, wherein the old bridge part includes the old bridge side beams, and the new bridge part includes the new bridge side beams;

[0014] A support is also connected between the side beam of the old bridge and the old pier cap, and a support is also connected between the side beam of the new bridge and the new pier cap.

[0015] Furthermore, the sides where the old bridge side beams are connected to the new bridge side beams are provided with holes that cooperate with the connecting reinforcements, and the old bridge side beams and the new bridge side beams are provided with grooves that cooperate with the upper fixing parts and the lower fixing parts.

[0016] Furthermore, crash barriers are provided on the sides of the bridge.

[0017] Furthermore, a leveling layer is laid on the side beams of the old bridge and the new bridge, a waterproof layer is laid on the leveling layer, and a bridge road surface layer is laid on the waterproof layer.

[0018] Furthermore, in order to prevent the side beams of the new bridge and the old bridge from being subjected to concentrated application in the same direction, resulting in excessive stress and the resulting breakage and fracture of the side beams, when the present connecting device is used, the upper connecting plates and lower connecting plates of adjacent devices are alternately connected to the side beams, that is, when the first device is installed on the side beam of the old bridge, the upper connecting plate is fixed to the side beam, the second device is fixed to the lower connecting plate and the side beam, the third device is fixed to the upper connecting plate and the side beam, and so on; the corresponding connection order of the side beams of the new bridge is that the lower connecting plate of the first device is fixed to the side beam of the new bridge, the upper connecting plate of the second device is fixed to the side beam, and so on.

[0019] Furthermore, according to the length of each span of the bridge, a suitable installation form of the device is selected. The present invention provides three installation forms: two-end type, middle reinforcement type, and full-paving type. No matter which form is adopted, the device must be installed at both ends of each span beam, and the number of the devices installed continuously at each location is an even number to ensure that the force on the side beams of the new and old bridges is uniform. When the length of each span of the bridge is short or the deformation of the new and old bridges is not obvious, the two-end installation method is adopted; when the new and old bridges are obviously misaligned or the length is long, the middle reinforcement method is adopted; when none of the above methods are satisfied, the full-paving type is adopted.

[0020] Furthermore, according to the tensile limit that the bridge structure can withstand, an alarm device is installed on the side of the bridge. When the bridge stretches beyond the tensile limit, the alarm device sounds an alarm to remind the staff to repair the bridge structure, ensuring that the bridge structure can meet its use strength and avoiding danger caused by damage to the bridge structure.

[0021] A construction method for a connection device for widening an old bridge comprises the following specific steps:

[0022] S1. First determine the thickness of the side beams of the old bridge and the new bridge, adjust the vertical distance between the upper connecting plate and the lower connecting plate, and then adjust the horizontal distance between the upper connecting plate and the lower connecting plate. After the position adjustment is completed, carry out welding work. Before welding, make a hole in the waist connecting plate to ensure that the connecting reinforcement passes through. After the first set of devices is completed, check on site whether it meets the actual size. After confirmation, mass production will be carried out;

[0023] S2. First, break and process the edge of the old bridge side beam to make the inclination angle of the old bridge side beam and the waist connecting plate fit together, fix the device to the upper part of the old bridge side beam through the upper fixing screws of the upper connecting plate, or fix the device to the lower part of the old bridge side beam through the lower fixing screws of the lower connecting plate, insert the connecting ribs into the old bridge side beam through the holes, and after the connecting ribs are inserted, weld the connecting ribs to the waist connecting plate, rotate the upper fixing plate or the lower fixing plate, and insert the upper fixing piece or the lower fixing piece into the groove position of the old bridge side beam to complete the assembly of the device;

[0024] S3. Continue to install the connection devices according to S1 and S2, and alternately install and fix the upper connection plates and lower connection plates of adjacent devices between the top of the old bridge and the top of the new bridge;

[0025] With the alternating installation of the connection device, the tilting direction of the waist connection plate is constantly changing, and the breaking and treatment of the joint between the old bridge and the waist connection plate are adjusted with the change of the tilting direction of the waist connection plate;

[0026] S4. After each section of the device is installed, mortar is poured into the pouring port to fill the gap. The above steps complete the construction of the old bridge section;

[0027] S5. When using on-site formwork to cast new bridge beams and slabs, use the upper and lower connecting plates as part of the formwork. Tighten the upper and lower fixing screws into place before the formwork is completed, and seal the screw holes with waterproof materials. After the formwork is completed, pour concrete. The concrete will wrap the connecting bars in the adjacent devices to form a force-bearing whole.

[0028] If prefabricated beams and slabs are used, holes for connecting reinforcements are reserved in advance at the side of the new bridge side beams when prefabricated components are made at the beam yard. After the prefabricated beams and slabs are made, they are hoisted to the site and placed on the new bridge pier caps to ensure that the new bridge side beams are smoothly inserted into the cross space formed by the upper connecting plate and the lower connecting plate on one side of the new bridge side beams. After installation, tighten the upper fixing screws and the lower fixing screws on one side of the new bridge, and pour mortar into the part on one side of the new bridge to fill the gap;

[0029] S6. After the entire bridge beam slab is paved, a leveling layer is laid on top to level the structure, and then a waterproof layer is laid on top of the leveling layer, and then the bridge road surface layer is constructed;

[0030] S7. The lengthening and widening construction of the bridge are the same. The processing position is at the end of the longitudinal section of the beam slab, rather than the end of the cross-section side beam. The installation method of the bridge lengthening construction device adopts the full-paving method.

[0031] The beneficial effects of the present invention are:

[0032] 1. In the scheme of the connecting components, the upper connecting parts and the lower connecting parts limit the connection position of the new bridge, and at the same time, the leveling layer is re-cast above the side beams of the new bridge and the old bridge, so as to realize the rapid alignment and connection of the new bridge and the old bridge, ensure the tightness of the connection between the new bridge and the old bridge, and cast the leveling layer to avoid the misalignment between the new bridge and the old bridge.

[0033] 2. The scheme of the connecting piece, the cooperation between the spring inside the connecting piece and the inner sleeve and the outer sleeve is used to buffer the bridge stretching to a certain extent to avoid cracks or damage inside the bridge structure.

[0034] 3. The pouring port provided on the upper fixed plate allows pouring materials to enter through the pouring port to fill the gap between the new bridge and the old bridge and the waist connecting plate, thereby improving the connection strength of the device.

[0035] 4. A waterproof layer is laid above the leveling layer to waterproof the road surface and prevent damage to the interior of the bridge structure caused by rainwater erosion.

[0036] 5. A solution for installing supports between the bridge side beams and the pier caps, wherein the supports are made of elastic concrete material, providing a certain degree of buffering in the vertical direction of the bridge and reducing damage to the internal structure of the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 is a schematic diagram of the connection between the new bridge and the old bridge of the present invention;

[0039] Figure 2 The present invention Figure 1 The enlarged view of point A in the middle;

[0040] Figure 3 is a stereogram of the present invention;

[0041] Figure 4 It is a schematic diagram of the structure of the present invention;

[0042] Figure 5 is a schematic diagram of a connector of the present invention;

[0043] Figure 6 It is a schematic diagram of the two-end laying of the connection device of the present invention;

[0044] Figure 7 It is a schematic diagram of the intermediate reinforcement laying of the connection device of the present invention;

[0045] Figure 8 It is a schematic diagram of the full-paving paving of the connecting device of the present invention.

[0046] Among them: 1. Old bridge pier body; 2. Old bridge pier cap; 3. Old bridge side beam; 4. Crash wall; 5. New bridge pier body; 6. New bridge pier cap; 7. New bridge side beam; 8. Waterproof layer; 9. Bridge road surface; 91. Old bridge road surface; 92. New bridge road surface; 10. Connecting parts; 101. Lower connecting plate; 102. Upper connecting plate; 103. Waist connecting plate; 104. Connecting ribs; 105. Upper solid Fixed plate; 106, lower fixed plate; 107, upper fixing piece; 108, lower fixing piece; 109, pouring port; 1010, upper connecting piece; 10101, spring; 10102, outer sleeve; 10103, inner sleeve; 10104, outer shell; 10105, screw; 1011, lower connecting piece; 1012, lower fixing screw; 1013, upper fixing screw; 11, support. DETAILED DESCRIPTION

[0047] The following will describe the implementation methods of the present invention in detail with reference to the accompanying drawings and examples, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0048] Embodiment 1

[0049] like Figures 1 to 8 A connecting device for widening an old bridge shown in the figure comprises a connecting component 10, wherein the connecting component 10 comprises a lower connecting plate 101, an upper connecting plate 102 and a waist connecting plate 103, wherein the lower connecting plate 101 and the upper connecting plate 102 are parallel, and a through hole is provided inside the waist connecting plate 103, and a connecting rib 104 is installed in the through hole;

[0050] It also includes a fixing component, which includes a lower fixing screw 1012 and an upper fixing screw 1013;

[0051] An upper fixing plate 105 is hingedly connected to one side of the upper connecting plate 102 close to the waist connecting plate 103 , and a pouring port 109 is provided on the upper fixing plate 105 .

[0052] Embodiment 2

[0053] like Figures 1 to 8 The connecting device for widening an old bridge shown in the figure is based on the first embodiment, wherein the upper fixing plate 105 is connected to an upper fixing piece 107 on a side away from the waist connecting plate 103, the lower connecting plate 101 is hinged to a lower fixing plate 106 on a side close to the waist connecting plate 103, and the lower fixing plate 106 is connected to a lower fixing piece 108 on a side away from the waist connecting plate 103;

[0054] It also includes connecting members, the connecting members include an upper connecting member 1010 and a lower connecting member 1011, the upper connecting member 1010 is installed inside the upper fixing plate 105, and the lower connecting member 1011 is installed inside the lower fixing plate 106;

[0055] The upper connecting member 1010 and the lower connecting member 1011 are both retractable;

[0056] A spring 10101 is fixedly installed inside the connecting member, and the spring 10101 is fixedly connected to both ends of the connecting member. An outer sleeve 10102 is fixedly installed at one end of the connecting member, and an inner sleeve 10103 is fixedly installed at the other end of the connecting member. The outer sleeve 10102 is sleeved on the outside of the inner sleeve 10103, and the inner sleeve 10103 is sleeved on the outside of the spring 10101. A screw 10105 is installed on the side of the connecting member, and a housing 10104 is installed on the outside of the connecting member.

[0057] It also includes an old bridge part and a new bridge part, wherein the old bridge part includes an old bridge side beam 3, and the new bridge part includes a new bridge side beam 7;

[0058] A support 11 is also connected between the old bridge side beam 3 and the old bridge pier cap 2, and a support 11 is also connected between the new bridge side beam 7 and the new bridge pier cap 5;

[0059] A crash barrier 4 is also provided above the side of the bridge;

[0060] The sides where the old bridge side beam 3 and the new bridge side beam 7 are connected are provided with holes that match the connecting ribs 104, and the old bridge side beam 3 and the new bridge side beam 7 are provided with grooves that match the upper fixing piece 107 and the lower fixing piece 108;

[0061] A leveling layer is laid on the old bridge side beam 3 and the new bridge side beam 7, a waterproof layer 8 is laid on the leveling layer, and a bridge road surface layer 9 is laid on the waterproof layer 8.

[0062] Embodiment 3

[0063] like Figures 1 to 8 The construction method of a connecting device for widening an old bridge shown in the figure comprises the following specific steps:

[0064] S1. First, determine the thickness of the old bridge side beam 3 and the new bridge side beam 7, adjust the vertical distance between the upper connecting plate 102 and the lower connecting plate 101, and then adjust the horizontal distance between the upper connecting plate 102 and the lower connecting plate 101. After the position adjustment is completed, perform welding work. Before welding, make a hole in the waist connecting plate 103 to ensure that the connecting rib 104 passes through. After the first set of devices is completed, check on site whether it meets the actual size, and mass production will be carried out after confirmation.

[0065] S2, first break and process the edge of the old bridge side beam 3, so that the old bridge side beam 3 and the waist connecting plate 103 are aligned at an inclination angle, the device is fixed to the upper part of the old bridge side beam 3 by the upper fixing screws 1013 of the upper connecting plate 102, or the device is fixed to the lower part of the old bridge side beam 3 by the lower fixing screws 1012 of the lower connecting plate 101, and the connecting rib 104 is inserted into the old bridge side beam 3 through the hole position. After the connecting rib 104 is inserted, the connecting rib 104 and the waist connecting plate 103 are welded, the upper fixing plate 105 or the lower fixing plate 106 is rotated, and the upper fixing piece 107 or the lower fixing piece 108 is inserted into the groove position of the old bridge side beam 3 to complete the assembly of the device;

[0066] S3, continue to complete the installation of the connection device 10 according to S1 and S2, and the upper connection plates 102 and the lower connection plates 101 of the adjacent devices are alternately installed and fixed between the top of the old bridge and the top of the new bridge;

[0067] As the connection device 10 is alternately installed, the tilting direction of the waist connection plate 103 is constantly changing, and the breaking and processing of the joint between the old bridge and the waist connection plate 103 are adjusted along with the change of the tilting direction of the waist connection plate 103;

[0068] S4, after each section of the device is installed, mortar is poured into the pouring port 109 to fill the gaps. The above steps complete the construction of the old bridge section;

[0069] S5. When using on-site formwork to cast new bridge beams and slabs, the upper connecting plate 102 and the lower connecting plate 101 are used as part of the formwork. Before the formwork is completed, the upper fixing screws 1013 and the lower fixing screws 1012 are tightened in place, and the screw holes are sealed with waterproof materials. After the formwork is completed, concrete is poured. The concrete will wrap the connecting ribs 104 in each adjacent device to form a force-bearing whole.

[0070] If prefabricated beams and slabs are used, holes for connecting ribs 104 are reserved in advance at the side of the new bridge side beam 7 when the prefabricated components are made in the beam yard. After the prefabricated beams and slabs are made, they are hoisted to the site and placed on the new bridge pier cap 6 to ensure that the new bridge side beam 7 is smoothly inserted into the cross space formed by the upper connecting plate 102 and the lower connecting plate 101 on one side of the new bridge side beam 7. After the installation is completed, the upper fixing screws 1013 and the lower fixing screws 1012 on one side of the new bridge are tightened, and mortar is poured into the part on one side of the new bridge to fill the gap;

[0071] S6, after the entire bridge beam slab is paved, a leveling layer is laid on top to level the structure, a waterproof layer is laid on top of the leveling layer, and then the bridge road surface layer 9 is constructed;

[0072] S7. The lengthening and widening construction of the bridge are the same. The processing position is at the end of the longitudinal section of the beam slab, rather than the end of the cross-section side beam. The installation method of the bridge lengthening construction device adopts the full-paving method.

[0073] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0074] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A connection device for widening an old bridge, characterized in that: The invention comprises a connecting component (10), wherein the connecting component (10) comprises a lower connecting plate (101), an upper connecting plate (102) and a waist connecting plate (103), wherein the lower connecting plate (101) and the upper connecting plate (102) are parallel, and a through hole is provided inside the waist connecting plate (103), and a connecting rib (104) is installed in the through hole; It also includes a fixing component, which includes a lower fixing screw (1012) and an upper fixing screw (1013); An upper fixing plate (105) is hingedly connected to one side of the upper connecting plate (102) close to the waist connecting plate (103), and a pouring port (109) is provided on the upper fixing plate (105).

2. A connection device for widening an old bridge according to claim 1, characterized in that: The side of the upper fixing plate (105) away from the waist connecting plate (103) is connected to an upper fixing piece (107), the side of the lower connecting plate (101) close to the waist connecting plate (103) is hinged to a lower fixing plate (106), and the side of the lower fixing plate (106) away from the waist connecting plate (103) is connected to a lower fixing piece (108).

3. The connecting device for widening an old bridge according to claim 1, characterized in that: It also includes connecting members, which include an upper connecting member (1010) and a lower connecting member (1011), wherein the upper connecting member (1010) is installed inside the upper fixing plate (105), and the lower connecting member (1011) is installed inside the lower fixing plate (106).

4. The connecting device for widening an old bridge according to claim 3, characterized in that: The upper layer connecting piece (1010) and the lower layer connecting piece (1011) are both retractable.

5. The connecting device for widening an old bridge according to claim 4, characterized in that: A spring (10101) is fixedly installed inside the connecting member, and the spring (10101) is fixedly connected to the two ends of the connecting member. An outer sleeve (10102) is fixedly installed at one end of the connecting member, and an inner sleeve (10103) is fixedly installed at the other end of the connecting member. The inner sleeve (10103) is sleeved on the outside of the spring (10101), and the outer sleeve (10102) is sleeved on the outside of the inner sleeve (10103). Screws (10105) are installed on the side of the connecting member, and an outer shell (10104) is installed on the outside of the connecting member.

6. The connecting device for widening an old bridge according to claim 1, characterized in that: It also includes an old bridge part and a new bridge part, wherein the old bridge part includes an old bridge side beam (3), and the new bridge part includes a new bridge side beam (7); A support (11) is also connected between the old bridge side beam (3) and the old bridge pier cap (2), and a support (11) is also connected between the new bridge side beam (7) and the new bridge pier cap (5).

7. The connecting device for widening an old bridge according to claim 6, characterized in that: The sides where the old bridge side beam (3) and the new bridge side beam (7) are connected are provided with holes that cooperate with the connecting ribs (104), and the old bridge side beam (3) and the new bridge side beam (7) are provided with grooves that cooperate with the upper fixing piece (107) and the lower fixing piece (108).

8. The connecting device for widening an old bridge according to claim 7, characterized in that: A leveling layer is laid above the old bridge side beam (3) and the new bridge side beam (7), a waterproof layer (8) is laid above the leveling layer, and a bridge road surface layer (9) is laid above the waterproof layer (8).

9. A construction method for a connection device for widening an old bridge, characterized in that: The specific steps include: S1. First, determine the thickness of the old bridge side beam (3) and the new bridge side beam (7), adjust the vertical distance between the upper connecting plate (102) and the lower connecting plate (101), and then adjust the horizontal distance between the upper connecting plate (102) and the lower connecting plate (101). After the position adjustment is completed, perform welding. Before welding, make a hole in the waist connecting plate (103) to ensure that the connecting rib (104) passes through. After the first set of devices is manufactured, check on site whether it meets the actual size. After confirmation, mass production is carried out; S2, firstly break and process the edge of the old bridge side beam (3) so that the inclination angle of the old bridge side beam (3) and the waist connecting plate (103) fit together, fix the device to the upper part of the old bridge side beam (3) by the upper fixing screws (1013) of the upper connecting plate (102), or fix the device to the lower part of the old bridge side beam (3) by the lower fixing screws (1012) of the lower connecting plate (101), insert the connecting rib (104) into the old bridge side beam (3) through the hole, and after the connecting rib (104) is inserted, weld the connecting rib (104) and the waist connecting plate (103), rotate the upper fixing plate (105) or the lower fixing plate (106), and insert the upper fixing member (107) or the lower fixing member (108) into the groove position of the old bridge side beam (3), so as to complete the assembly of the device; S3, continue to complete the installation of the connection device (10) according to S1 and S2, and the upper connection plates (102) and lower connection plates (101) of adjacent devices are alternately installed and fixed between the top of the old bridge and the top of the new bridge; As the connection device (10) is alternately installed, the tilting direction of the waist connection plate (103) changes continuously, and the breaking and processing of the joint part between the old bridge and the waist connection plate (103) are adjusted along with the change of the tilting direction of the waist connection plate (103); S4, after each section of the device is installed, mortar is poured into the pouring port (109) to fill the gaps. The above steps complete the construction of the old bridge section; S5. When using on-site formwork to cast new bridge beams and slabs, the upper connecting plate (102) and the lower connecting plate (101) are used as part of the formwork. Before the formwork is completed, the upper fixing screws (1013) and the lower fixing screws (1012) are tightened in place, and the screw holes are sealed with waterproof materials. After the formwork is completed, concrete is cast. The concrete will wrap the connecting ribs (104) in each adjacent device to form a force-bearing whole. If prefabricated beams and slabs are used, when the prefabricated components are manufactured at the beam yard, holes for the connecting ribs (104) are reserved in advance at the side positions of the new bridge side beams (7). After the prefabricated beams and slabs are manufactured, they are hoisted to the site and placed on the new bridge pier cap (6) to ensure that the new bridge side beams (7) are smoothly inserted into the cross space formed by the upper connecting plate (102) and the lower connecting plate (101) on one side of the new bridge side beams (7). After the installation is completed, the upper fixing screws (1013) and the lower fixing screws (1012) on one side of the new bridge are tightened, and mortar is poured into the part on the new bridge side to fill the gap; S6. After the entire bridge beam and slab are paved, a leveling layer is laid on top to level the structure, and then a waterproof layer is laid on top of the leveling layer, and then the bridge road surface layer is constructed (9).

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