Prefabricated assembly type corrugated steel web composite box girder

Abstract

The application provides a prefabricated corrugated steel web combined box girder, which comprises a bottom plate, a top plate and a web, the top and bottom of the web are respectively provided with integrally formed first steel seats and second steel seats, the surface of the bottom plate is provided with first installation grooves matched with the first steel seats, the top plate comprises a horizontal bridge plate and inclined bridge plates arranged on both sides of the horizontal bridge plate, the lower surface of the horizontal bridge plate is provided with second installation grooves matched with the second steel seats, wherein the web can be clamped between the bottom plate and the top plate through the first steel seats and the second steel seats at both ends of the web, the bottom of the horizontal bridge plate is provided with a locking assembly, and the bottom plate is further provided with a buffer assembly. The application can stably assemble and fix the web, the top plate and the bottom plate, and prevents the upper and lower ends of the corrugated steel web from being directly laid with concrete and being damaged due to fatigue.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering technology, and more specifically, to a prefabricated assembled corrugated steel web composite box girder. Background Technology

[0002] Corrugated steel web prestressed concrete composite beams are a novel bridge structure that uses corrugated steel plates instead of concrete as the web of a box girder. They are simple in construction, have clearly defined structural stresses, and the use of corrugated steel webs to bear shear stress avoids the common web cracking problem in prestressed concrete box girder bridges. The corrugated steel webs exhibit an accordion effect, reducing the impact of concrete shrinkage and creep, and allowing longitudinal prestress to be fully applied to the top and bottom concrete slabs.

[0003] Currently, the corrugated steel web of box girders is connected to the top and bottom concrete slabs by cement. Therefore, the upper and lower connection ends of the corrugated steel web are prone to fatigue damage, which reduces the load-bearing capacity of the corrugated steel web. Furthermore, when the corrugated steel web and top slab are erected on the bottom slab in sequence, it is not convenient to install the corrugated steel web and top slab spliced ​​on the bottom slab stably because there are no good fixing and buffering measures. Summary of the Invention

[0004] The purpose of this invention is to address the problem that prefabricated assembled corrugated steel web composite box girders cannot be stably assembled, and that the upper and lower ends of the corrugated steel web are directly connected to the concrete, which easily leads to fatigue damage.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0006] Prefabricated assembled corrugated steel web composite box girders are used to improve the above-mentioned problems.

[0007] The application is as follows:

[0008] The device includes a base plate, a top plate, and a web plate. The web plate has an integrally formed first steel seat and a second steel seat at its top and bottom, respectively. The base plate has a first mounting groove on its surface that mates with the first steel seat. The top plate includes a horizontal bridge plate and inclined bridge plates on both sides thereof. The lower surface of the horizontal bridge plate has a second mounting groove that mates with the second steel seat. The web plate can be engaged between the base plate and the top plate via the first and second steel seats at its two ends. A locking assembly is provided at the bottom of the horizontal bridge plate, and a buffer assembly is provided on the base plate.

[0009] As a preferred technical solution of this application, the locking assembly includes a screw rod rotatably connected to the bottom of the horizontal bridge plate via a support block, a screw cylinder threaded to the screw rod, a push plate disposed on the end face of the screw cylinder away from the screw rod, and multiple sets of locking reinforcing bars disposed on the surface of the push plate. The bottom of the horizontal bridge plate is provided with a sliding groove, and the push plate is slidably connected to the sliding groove. The side walls of the second steel seat and the second mounting groove are provided with reinforcing bar grooves that are interconnected and cooperate with the locking reinforcing bars.

[0010] As a preferred technical solution of this application, a fixing frame is provided on the base plate, the fixing frame is located on the outside of the first steel seat and a gap is reserved between the fixing frame and the side wall of the first steel seat.

[0011] As a preferred technical solution of this application, the buffer assembly includes mounting frames disposed on both sides of the base plate, a fixed column disposed on the inner wall of the mounting frame, a movable seat slidably connected to the fixed column, a first spring sleeved between the mounting frame and the movable seat, a support column rotatably connected to the movable seat, and a support seat rotatably connected to the top of the support column.

[0012] As a preferred technical solution of this application, a cement groove is formed on the upper surface of the support base, and a filling groove connected to the cement groove is formed on the side wall of the support base.

[0013] As a preferred technical solution of this application, the bottom sides of the top plate are also provided with support components. The support components include a support plate that cooperates with the inclined bridge plate, an arc-shaped pressure plate set at the bottom of the support plate, and bolts threadedly connected to the support plate. The lower surface of the inclined bridge plate is provided with screw holes that cooperate with the bolts.

[0014] As a preferred technical solution of this application, the base plate has a movable groove and a slot communicating with the first mounting groove inside. The support assembly also includes a pressure block disposed at the bottom of the arc-shaped pressure plate, a card seat slidably connected in the movable groove, an insert plate slidably connected in the slot and connected to the card seat, and a second spring disposed between the card seat and the inner wall of the movable groove. The side wall of the first steel seat located inside the first mounting groove has a card groove that cooperates with the insert plate.

[0015] As a preferred technical solution of this application, a tensioning assembly is also provided between the two sets of web plates. The tensioning assembly includes a threaded tube rotatably connected between the second steel seat and the fixed frame, a screw threaded inside the threaded tube, and a screw sleeve provided on the end face of one set of screws away from the threaded tube, and the end of the other set of screws away from the threaded tube cooperates with the screw sleeve.

[0016] As a preferred technical solution of this application, the tensioning assembly is provided in multiple sets, and the adjacent sets of tensioning assemblies are staggered between the two sets of webs.

[0017] As a preferred technical solution of this application, reinforcing steel bars are also provided between the two sets of base plates.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] In the scheme of this application:

[0020] The first and second steel seats set at the top and bottom of the web can be accurately inserted into the first and second mounting slots on the bottom and top plates, thereby enabling temporary assembly and fixation of the bottom plate, top plate, and web, preventing the problem of mutual sliding and displacement caused by direct erection.

[0021] After the bottom plate, web plate, and top plate are stably spliced ​​together, the web plate and top plate can be locked by locking components, and the bottom plate and web plate can be locked by supporting components. This makes it easy to stably install the web plate between the bottom plate and the top plate, thus preventing fatigue damage caused by the upper and lower ends of the web plate being directly connected to the top and bottom plates by cement.

[0022] When the top plate is placed on the web plate, the buffer assembly can support and cushion the falling top plate to prevent the excessive weight of the top plate from squeezing the web plate and causing damage when it comes into contact with the top of the web plate. In addition, the support assembly can also support the falling top plate to further prevent damage to the web plate when the top plate falls. Attached Figure Description

[0023] Figure 1 A structural schematic diagram of the prefabricated assembled corrugated steel web composite box girder provided in this application;

[0024] Figure 2 A schematic diagram of the prefabricated assembled corrugated steel web composite box girder structure provided for this application;

[0025] Figure 3 A schematic diagram of the prefabricated assembled corrugated steel web composite box girder structure provided for this application;

[0026] Figure 4 A schematic diagram of the prefabricated assembled corrugated steel web composite box girder structure provided for this application;

[0027] Figure 5 A schematic diagram of the connection structure between the bottom plate and the web of the prefabricated assembled corrugated steel web composite box girder provided in this application;

[0028] Figure 6 A schematic diagram of the connection structure between the bottom plate and the web of the prefabricated assembled corrugated steel web composite box girder provided in this application;

[0029] Figure 7 A schematic diagram of the top plate and web structure of the prefabricated assembled corrugated steel web composite box girder provided in this application;

[0030] Figure 8 A schematic diagram of the top slab structure of the prefabricated assembled corrugated steel web composite box girder provided in this application;

[0031] Figure 9 Provided for this application Figure 4 Enlarged structural diagram at point A in the middle.

[0032] The image shows:

[0033] 1. Base plate; 101. First mounting slot; 102. Moving slot; 103. Slot; 2. Top plate; 201. Horizontal bridge plate; 2011. Second mounting slot; 202. Inclined bridge plate; 203. Slide groove; 3. Web plate; 301. First steel seat; 3011. Slot; 302. Second steel seat; 4. Fixing frame; 5. Tensioning assembly; 51. Screw tube; 52. Screw; 53. Screw sleeve; 6. Locking assembly; 61. Lead screw; 62. Threaded rod 63. Cylinder; 64. Push plate; 7. Locking steel bar; 7. Buffer assembly; 71. Mounting frame; 72. Fixed column; 73. Moving seat; 74. Support column; 75. Support seat; 751. Cement trough; 752. Filling trough; 76. First spring; 8. Support assembly; 81. Support plate; 82. Arc-shaped pressure plate; 83. Bolt; 84. Pressure block; 85. Card seat; 86. Insert plate; 87. Second spring; 9. Reinforcing steel bar; 10. Steel bar trough. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] Therefore, the following detailed description of embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely illustrates some embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] like Figures 1 to 9 As shown, this embodiment proposes a prefabricated assembled corrugated steel web composite box girder, including a bottom plate 1, a top plate 2 and a web plate 3. The top and bottom of the web plate 3 are respectively provided with an integrally formed first steel seat 301 and a second steel seat 302. The surface of the bottom plate 1 is provided with a first mounting groove 101 that mates with the first steel seat 301. The top plate 2 includes a horizontal bridge plate 201 and inclined bridge plates 202 provided on both sides thereon. The lower surface of the horizontal bridge plate 201 is provided with a second mounting groove 2011 that mates with the second steel seat 302. The web plate 3 can be snapped between the bottom plate 1 and the top plate 2 by the first steel seat 301 and the second steel seat 302 at both ends. The bottom of the horizontal bridge plate 201 is provided with a locking component 6, and the bottom plate 1 is also provided with a buffer component 7.

[0040] First, the two sets of web plates 3 are lifted by a crane and placed on the two sets of base plates 1. The first steel seat 301 at the bottom of the web plate 3 is inserted into the first mounting groove 101 on the base plate 1. Then, the top plate 2 is lifted and placed on the web plate 3. The second steel seat 302 at the top of the web plate 3 is inserted into the second mounting groove 2011 at the bottom of the top plate 2. This allows for a temporary and stable splicing of the base plate 1, web plate 3, and top plate 2, preventing slippage caused by direct erection. Furthermore, the web plate 3 is protected and fixed by the buffer component 7 and the support component 8 when splicing the top plate 2. Then, the top plate 2 and web plate 3 are stably installed and connected by the locking component 6, saving time and preventing fatigue damage caused by direct cement connection between the web plate 3 and the top plate 2 and base plate 1.

[0041] like Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 8As shown, in a preferred embodiment, based on the above method, the locking assembly 6 further includes a lead screw 61 rotatably connected to the bottom of the horizontal bridge plate 201 via a support block, a screw cylinder 62 threadedly connected to the lead screw 61, a push plate 63 disposed on the end face of the screw cylinder 62 away from the lead screw 61, and multiple sets of locking reinforcing bars 64 disposed on the surface of the push plate 63. A sliding groove 203 is provided at the bottom of the horizontal bridge plate 201, and the push plate 63 is slidably connected to the sliding groove 203. The side walls of the second steel seat 302 and the second mounting groove 2011 are provided with reinforcing bar grooves 10 that are interconnected and cooperate with the locking reinforcing bars 64.

[0042] A fixing frame 4 is provided on the base plate 1. The fixing frame 4 is located on the outside of the first steel seat 301 and a gap is reserved between it and the side wall of the first steel seat 301.

[0043] After the top plate 2 is erected on the second steel seat 302 on top of the web plate 3, the screw rod 61 can be rotated to move the screw cylinders 62 on both sides to the sides, which in turn can drive the push plate 63 to move and pass through the large number of locking steel bars 64 on its surface through the second mounting groove 2011 and the steel bar groove 10 on the second steel seat 302. First, the connection end of the web plate 3 and the top plate 2 is stably locked. Then, cement grout is injected into the reserved gap between the fixing frame 4 and the first steel seat 301 to fix the first steel seat 301 a second time and improve stability. This can prevent fatigue damage from directly bonding the upper and lower ends of the web plate 3 to the top plate 2 and the bottom plate 1 through cement, which would affect the load-bearing effect.

[0044] like Figure 3 , Figure 4 and Figure 9 As shown, in a preferred embodiment, based on the above method, the buffer assembly 7 further includes a mounting frame 71 disposed on both sides of the base plate 1, a fixed post 72 disposed on the inner wall of the mounting frame 71, a movable seat 73 slidably connected to the fixed post 72, a first spring 76 sleeved between the fixed post 72 and the mounting frame 71 and the movable seat 73, a support post 74 rotatably connected to the movable seat 73, and a support seat 75 rotatably connected to the top of the support post 74;

[0045] The upper surface of the support base 75 is provided with a cement groove 751, and the side wall of the support base 75 is provided with a filling groove 752 that communicates with the cement groove 751.

[0046] When the suspended top plate 2 is lowered onto the top of the web plate 3, the top plate 2 will first contact the support seat 75 and press the support seat 75 downward. At this time, the support seat 75 will press the movable seat 73 on the fixed column 72 through the support column 74. The movable seat 73 will slide on the fixed column 72 and press the first spring 76. Therefore, the first spring 76 will buffer the support column 74 and the support seat 75, thereby buffering the falling top plate 2 and preventing the top plate 2 from directly contacting the web plate 3 due to excessive weight and causing damage to the web plate 3. After the top plate 2 is installed on the web plate 3, cement can be injected into the cement trough 751 inside the support seat 75 through the filling groove 752 to build the support seat 75 into the bottom of the top plate 2, thereby supporting the installed top plate 2 and improving the stability of the box girder.

[0047] like Figure 4 As shown, in a preferred embodiment, based on the above method, a tensioning assembly 5 is further provided between the two sets of web plates 3. The tensioning assembly 5 includes a screw tube 51 rotatably connected between the second steel seat 302 and the fixed frame 4, a screw rod 52 threadedly connected inside the screw tube 51, and a screw sleeve 53 provided on the end face of one set of screw rods 52 away from the screw tube 51, and the end of the other set of screw rods 52 away from the screw tube 51 cooperates with the screw sleeve 53.

[0048] After the web plate 3 is assembled between the bottom plate 1 and the top plate 2, the corresponding screws 52 on the second steel seat 302 and the fixed frame 4 can be screwed out from the screw tube 51, and then one set of screws 52 can be screwed into the screw sleeve 53 on the other set of screws 52, so as to tighten and support the two sets of web plates 3 and prevent the web plates 3 from tilting.

[0049] The tensioning assembly 5 is provided in multiple sets, and two adjacent sets of tensioning assemblies 5 are staggered between the two sets of web plates 3; moreover, the multiple sets of staggered tensioning assemblies can support the two sets of web plates 3 at different positions, further improving the stability between the web plates.

[0050] Among them, there is also a reinforcing steel bar 9 between the two sets of base plates 1; the reinforcing steel bar 9 can improve the stability between the two sets of base plates 1, and it is not necessary to use a whole large base plate 1, which can save resources.

[0051] like Figure 2 , 5 and Figure 6 As shown, in a preferred embodiment, based on the above method, the bottom sides of the top plate 2 are further provided with support components 8. The support components 8 include a support plate 81 that cooperates with the inclined bridge plate 202, an arc-shaped pressure plate 82 provided at the bottom of the support plate 81, and bolts 83 threadedly connected to the support plate 81. The lower surface of the inclined bridge plate 202 is provided with screw holes that cooperate with the bolts 83.

[0052] The base plate 1 has a movable groove 102 and a slot 103 that communicates with the first mounting groove 101. The support assembly 8 also includes a pressure block 84 disposed at the bottom of the arc-shaped pressure plate 82, a card seat 85 slidably connected in the movable groove 102, an insert plate 86 slidably connected in the slot 103 and connected to the card seat 85, and a second spring 87 disposed between the card seat 85 and the inner wall of the movable groove 102. The first steel base 301 has a card groove 3011 that cooperates with the insert plate 86 on the side wall inside the first mounting groove 101.

[0053] Before hoisting the top plate 2, the support plate 81 is first installed at the bottom of the inclined bridge plate 202 on both sides of the top plate 2 using multiple sets of bolts 83. After the top plate 2 is hoisted onto the web plate 3, the arc-shaped pressure plate 82 at the bottom of the support plate 81 will press the card seat 85 through the pressure block 84 and push the card seat 85 to slide in the moving groove 102, causing the insertion plate 86 to slide into the card groove 3011 on the side wall of the first steel seat 301 in the slot 103. At this time, the arc-shaped pressure plate 82 can not only support both sides of the top plate 2, but also further lock and fix the web plate 3 on the first steel seat 301 through the insertion plate 86 to improve stability.

[0054] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described herein. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present invention, as well as all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present invention.

Claims

1. A prefabricated assembled corrugated steel web composite box girder, comprising a bottom plate (1), a top plate (2), and a web plate (3), characterized in that, The top and bottom of the web plate (3) are respectively provided with an integrally formed first steel seat (301) and a second steel seat (302). The surface of the bottom plate (1) is provided with a first mounting groove (101) that cooperates with the first steel seat (301). The top plate (2) includes a horizontal bridge plate (201) and inclined bridge plates (202) provided on both sides thereon. The lower surface of the horizontal bridge plate (201) is provided with a second mounting groove (2011) that cooperates with the second steel seat (302). The web plate (3) can be snapped between the bottom plate (1) and the top plate (2) by the first steel seat (301) and the second steel seat (302) at both ends. The bottom of the horizontal bridge plate (201) is provided with a locking component (6). The bottom plate (1) is also provided with a buffer component (7). The bottom sides of the top plate (2) are also provided with support components (8). The support components (8) include a support plate (81) that cooperates with the inclined bridge plate (202), an arc-shaped pressure plate (82) set at the bottom of the support plate (81), and bolts (83) threadedly connected to the support plate (81). The lower surface of the inclined bridge plate (202) is provided with screw holes that cooperate with the bolts (83). The base plate (1) has a movable groove (102) and a slot (103) that communicates with the first mounting groove (101). The support assembly (8) also includes a pressure block (84) disposed at the bottom of the arc-shaped pressure plate (82), a card seat (85) slidably connected in the movable groove (102), an insert plate (86) slidably connected in the slot (103) and connected to the card seat (85), and a second spring (87) disposed between the card seat (85) and the inner wall of the movable groove (102). The first steel seat (301) has a card groove (3011) that cooperates with the insert plate (86) on the side wall inside the first mounting groove (101). The locking assembly (6) includes a lead screw (61) rotatably connected to the bottom of the horizontal bridge plate (201) via a support block, a screw cylinder (62) threadedly connected to the lead screw (61), a push plate (63) disposed on the end face of the screw cylinder (62) away from the lead screw (61), and multiple sets of locking reinforcing bars (64) disposed on the surface of the push plate (63). The bottom of the horizontal bridge plate (201) is provided with a sliding groove (203), and the push plate (63) is slidably connected to the sliding groove (203). The side walls of the second steel seat (302) and the second mounting groove (2011) are provided with reinforcing bar grooves (10) that are interconnected and cooperate with the locking reinforcing bars (64). The buffer assembly (7) includes a mounting frame (71) on both sides of the base plate (1), a fixed column (72) on the inner wall of the mounting frame (71), a movable seat (73) slidably connected to the fixed column (72), a first spring (76) sleeved on the fixed column (72) between the mounting frame (71) and the movable seat (73), a support column (74) rotatably connected to the movable seat (73), and a support seat (75) rotatably connected to the top of the support column (74).

2. The prefabricated assembled corrugated steel web composite box girder according to claim 1, characterized in that, A fixing frame (4) is provided on the base plate (1). The fixing frame (4) is located on the outside of the first steel seat (301) and a gap is reserved between it and the side wall of the first steel seat (301).

3. The prefabricated assembled corrugated steel web composite box girder according to claim 1, characterized in that, The upper surface of the support base (75) is provided with a cement groove (751), and the side wall of the support base (75) is provided with a filling groove (752) that communicates with the cement groove (751).

4. A prefabricated assembled corrugated steel web composite box girder according to claim 2, characterized in that, A tensioning assembly (5) is also provided between the two sets of web plates (3). The tensioning assembly (5) includes a threaded tube (51) rotatably connected between the second steel seat (302) and the fixed frame (4), a screw (52) threaded inside the threaded tube (51), and a screw sleeve (53) provided on the end face of one set of screws (52) away from the threaded tube (51). The end of the other set of screws (52) away from the threaded tube (51) is engaged with the screw sleeve (53).

5. A prefabricated assembled corrugated steel web composite box girder according to claim 4, characterized in that, The tensioning assembly (5) is provided in multiple sets, and two adjacent sets of tensioning assemblies (5) are staggered between two sets of web plates (3).

6. A prefabricated assembled corrugated steel web composite box girder according to claim 1, characterized in that, Reinforcing steel bars (9) are also provided between the two sets of base plates (1).

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