Connection Structure of Simply Supported Small Box Girder and Its Construction Method

Abstract

This application relates to the field of simply supported box girder installation, and particularly to a connection structure for simply supported small box girders. It includes connecting steel bars embedded in the simply supported small box girder body. The connecting steel bars include a first horizontal part, a second horizontal part, and a bending part. A connecting plate is provided on the simply supported small box girder body. A receiving cavity with an opening facing the second horizontal part is provided on the connecting plate. The receiving cavity is used for the first horizontal part on the adjacent simply supported small box girder body to penetrate into. A limiting plate is provided on the connecting plate, and a driving member is provided on the connecting plate. The driving member is used to drive the limiting plate to abut against the surface of the bending part on the adjacent simply supported small box girder body close to the first horizontal part. This application has the effect of facilitating the connection of the connecting steel bars on two adjacent simply supported small box girders.

Description

Technical Field

[0001] This application relates to the technical field of simply supported box girder installation, especially the connection structure of simply supported small box girders and its construction method. Background Technique

[0002] When building a bridge, first pour bridge piers at the corresponding positions, pour capping beams on the bridge piers, then install rubber bearings on the capping beams, and finally use a crane to place the pre-cast simply supported small box girders on the rubber bearings. Since the bridge deck has a certain width, multiple groups of simply supported small box girders are arranged along the width direction of the capping beam, and a wet joint is provided between two adjacent simply supported small box girders, which is convenient for later pouring of concrete to integrate the two adjacent simply supported small box girders into one whole.

[0003] In order to improve the strength between two adjacent simply supported small box girders, when prefabricating simply supported small box girders, first prefabricate connecting steel bars on the side of the simply supported small box girder. The connecting steel bars are U-shaped and extend out of the side of the simply supported small box girder. Multiple connecting steel bars are arranged along the length direction of the simply supported small box girder; when the simply supported small box girders are installed, the connecting steel bars on two adjacent simply supported small box girders are connected by reinforcing steel bars. The reinforcing steel bars are fixed on the connecting steel bars of two adjacent simply supported small box girders by welding. Then, vertical steel bars are tied on the connecting steel bars. The vertical steel bars are arranged along the length direction of the simply supported small box girder. Finally, formwork is installed, and concrete is poured into the wet joint between the two simply supported small box girders.

[0004] In the above solution, before pouring concrete into the wet joint, it is necessary to weld reinforcing steel bars on the connecting steel bars. At the same time, multiple connecting steel bars are arranged along the length direction of the simply supported small box girder. Therefore, it is necessary to weld the reinforcing steel bars multiple times to complete the connection and fixation of the connecting steel bars on adjacent simply supported small box girders. Thus, it is very inconvenient to connect two adjacent simply supported small box girders, which affects the construction progress of the entire bridge. Summary of the Invention

[0005] In order to facilitate the connection of the connecting steel bars on two adjacent simply supported small box girders, this application provides a connection structure of simply supported small box girders and its construction method.

[0006] In the first aspect, the connection structure of simply supported small box girders provided by this application adopts the following technical solution:

[0007] The connection structure of simply supported small box girders includes connecting steel bars embedded on the simply supported small box girder body. The connecting steel bars include a first horizontal part, a second horizontal part and a bending part. A connecting plate is arranged on the simply supported small box girder body. A receiving cavity with an opening facing the second horizontal part is arranged on the connecting plate. The receiving cavity is used for the first horizontal part on the adjacent simply supported small box girder body to penetrate into. A limiting plate is arranged on the connecting plate. A driving part is arranged on the connecting plate. The driving part is used to drive the limiting plate to abut against the surface of the bending part on the adjacent simply supported small box girder body close to the first horizontal part.

[0008] By adopting the above technical scheme, when installing the simply supported small box girder body, first install the first simply supported small box girder body on the cap beam, and then install the adjacent simply supported small box girder body on the cap beam. When installing an adjacent simply supported small box girder body, first use a crane to make the adjacent simply supported small box girder body and the installed simply supported small box girder body in the same plane, and then move the simply supported small box girder body on the crane horizontally so that the accommodating cavity on the connecting plate corresponds to the first horizontal part on the installed simply supported small box girder body, and then continue to move the simply supported small box girder body horizontally so that the end face of the accommodating cavity abuts on the surface of the bent portion away from the first horizontal level, and then the driving member drives the limit plate to rotate so that the end face of the limit plate abuts on the surface of the bent portion close to the first horizontal part, thereby clamping and fixing the bent portion on the installed simply supported small box girder body between the top wall of the accommodating cavity and the limit plate, thereby fixing the connecting steel bars on the adjacent simply supported small box girder bodies through the connecting plate and the limit plate, instead of fixing by traditional welding, thereby improving installation efficiency and accelerating construction period.

[0009] Optionally, the driving member is configured as a driving sleeve, which is sleeved on the first horizontal portion and rotates in a receiving cavity on the connecting plate. The driving sleeve is provided with a clearance groove for facilitating the bending portion to slide on the driving sleeve.

[0010] By adopting the above technical scheme, when the simply supported small box girder body moves horizontally, the clearance groove on the driving sleeve corresponds to the opening on the accommodating cavity, and then the first horizontal part on the simply supported small box girder body that has been installed is moved into the driving sleeve. When the side of the bending part away from the first horizontal part abuts against the end face of the accommodating cavity, the entire connecting plate is installed. Then the driving sleeve is rotated so that the clearance groove on the driving sleeve and the opening on the accommodating cavity no longer correspond, thereby preventing the first horizontal part from moving in a direction perpendicular to the length of the connecting plate, and at the same time driving one end of the limiting plate to abut against the surface of the bending part close to the first horizontal part, on the one hand, realizing the limitation of the first horizontal part in the vertical and horizontal directions, which is more convenient in use.

[0011] Optionally, an adjusting ring is fixedly mounted on the driving sleeve, the adjusting ring protrudes from the surface of the connecting plate, and the adjusting ring is rotatably connected to the connecting plate.

[0012] By adopting the above technical solution, since the adjustment ring protrudes from the surface of the connecting plate, when driving the driving sleeve to rotate, it is only necessary to directly rotate the adjustment ring, which makes it more convenient to drive the driving sleeve in the connecting plate to rotate.

[0013] Optionally, a locking plate is slidably connected to the connecting plate, and the locking plate slides along the length direction of the connecting plate. A locking surface is provided on the adjusting ring, and the locking plate is used to abut against the locking surface.

[0014] By adopting the above technical solution, when the end face of the limiting plate abuts against the surface of the bending part close to the first horizontal part, the locking surface and the upper surface of the connecting plate are arranged in parallel, and then the locking plate is slid so that the lower surface of the locking plate abuts against the locking surface, so that the entire adjustment ring cannot rotate, thereby fixing the position of the adjusting ring, and at the same time fixing the position of the driving sleeve and the limiting plate.

[0015] Optionally, an elastic pushing member for pushing the surface of the locking plate to abut against the locking surface is installed on the connecting plate, and one end of the elastic pushing member is fixedly installed on the connecting plate, and the other end is fixedly installed on the locking plate.

[0016] By adopting the above technical solution, when the locking surface and the surface of the connecting plate are not flush, the end face of the locking plate abuts against the end face of the adjusting ring. At this time, the elastic pushing member is in a compressed state. Then the adjusting ring is rotated 90 degrees. When the locking surface and the surface of the connecting plate are flush, the elastic pushing member pushes the locking plate to move, so that the side face of the locking plate abuts against the locking surface. At this time, the adjusting ring cannot continue to rotate, which makes it more convenient to fix the position of the adjusting ring.

[0017] Optionally, a fixing component is provided on the connecting plate, and the fixing component is used to fix the vertical steel bars to the connecting steel bars.

[0018] By adopting the above technical scheme, under the action of the fixing assembly, the vertical steel bars arranged along the length direction of the simply supported small box girder body can be fixed on the connecting plate. At the same time, since the connecting steel bars are also fixed on the connecting plate, it is equivalent to connecting the connecting steel bars and the vertical steel bars, thereby improving the connection strength between the two adjacent simply supported small box girder bodies.

[0019] Optionally, the fixing assembly includes a fixing rod arranged on the connecting plate, a first fixing seat arranged on the fixing rod and a second fixing seat sliding on the fixing rod, the vertical steel bar is arranged between the first fixing seat and the second fixing seat, the driving sleeve is provided with a second driving member for driving the second fixing seat to move toward the direction close to the first fixing seat, and the second driving member makes the second fixing seat abut against the surface of the vertical steel bar.

[0020] By adopting the above technical solution, when the side of the bending portion away from the first horizontal portion abuts against the end face of the accommodating cavity, the transverse steel bar is placed between the first fixing seat and the second fixing seat, and then the adjusting ring is rotated. The adjusting ring drives the driving sleeve and the second driving member fixed on the driving sleeve to rotate. On the one hand, the giving groove on the driving sleeve and the opening of the accommodating cavity no longer correspond to each other. On the other hand, the second fixing seat is pushed toward the first fixing seat by the driving member. When the driving sleeve rotates 90 degrees, the locking surface rotates from a vertical state to a horizontal state, and at the same time, the second fixing seat abuts against the surface of the vertical steel bar, which makes it more convenient to fix the vertical steel bar.

[0021] Optionally, an elastic rubber sleeve is provided on a side of the second fixing seat close to the first fixing seat.

[0022] By adopting the above technical solution, when the adjusting ring rotates 90 degrees, the elastic rubber sleeve is compressed. Under the action of the elastic rubber sleeve, the fixing strength of the fixing component to the vertical steel bars can be improved.

[0023] Optionally, the second driving member is configured as an arc-shaped driving plate, and a guide surface is provided on the arc-shaped driving plate. The guide surface is inclined gradually approaching the end surface of the driving sleeve along the circumference of the driving sleeve, so that the area of ​​one end of the arc-shaped driving plate is larger than the area of ​​the other end.

[0024] By adopting the above technical solution, since one end of the annular driving plate is larger in area than the other end, when the driving ring is rotated, the end with a smaller area first rotates to between the second fixed seat and the end face of the connecting plate, and then the driving sleeve drives the arc driving plate to rotate, so that the cross-section moved to between the second fixed seat and the end face of the connecting plate gradually increases, so that the rotation of the arc driving plate can push the second fixed seat to move in the direction close to the first fixed seat, thereby making it more convenient to drive the second fixed seat to move.

[0025] In the second aspect, the construction method of the simply supported small box girder provided in the present application adopts the following steps:

[0026] S1: Make the adjacent simply supported small box girder bodies and the installed simply supported small box girder body have the same height, and the end surface opening of the accommodating cavity on the connecting plate corresponds to the first horizontal portion on the installed simply supported small box girder body;

[0027] S2: Horizontally move the simply supported small box girder body, so that the first horizontal part on the adjacent simply supported small box girder body that has been installed moves into the driving sleeve through the clearance groove;

[0028] S3: placing the vertical steel bar between the first fixing seat and the second fixing seat;

[0029] S4: Rotate the adjusting ring, and the adjusting ring drives the driving sleeve and the arc-shaped driving plate installed on the driving sleeve to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the main body structure of a simply supported small box girder according to an embodiment of the present application.

[0031] Figure 2 It is a schematic diagram of the connection between the simply supported small box girder body and the connecting steel bars in an embodiment of the present application.

[0032] Figure 3 It is an enlarged view of the connection relationship between the connecting plate and the connecting steel bars in the embodiment of the present application.

[0033] Figure 4 It is a schematic diagram of the connecting plate structure of an embodiment of the present application.

[0034] Figure 5 It is a schematic connection diagram of the driving sleeve and the limiting plate in the embodiment of the present application.

[0035] Figure 6 It is a sectional view of the connecting plate in the embodiment of the present application.

[0036] Figure 7 It is Figure 6 The enlarged view of part A in

[0037] Figure 8 It is an exploded schematic diagram of the fixing component and the connecting plate in the embodiment of the present application.

[0038] Figure 9 It is a schematic structural diagram of the arc-shaped driving plate in the embodiment of the present application.

[0039] Reference numerals: 01, second connecting steel bar; 02, simply supported small box girder body; 1, connecting steel bar; 11, first horizontal part; 12, second horizontal part; 13, bending part; 2, connecting plate; 21, accommodating cavity; 22, surface A; 23, relief groove; 3, driving member; 31, driving sleeve; 4, limiting plate; 41, adjusting ring; 42, locking surface; 43, installation groove; 5, locking plate; 51, elastic pushing member; 52, support plate; 53, elastic rubber sleeve; 6, fixing component; 61, first fixing seat; 62, second fixing seat; 63, fixing rod; 7, second driving member; 71, arc-shaped driving plate; 8, surface B; 81, surface C; 82, guiding surface. Detailed implementation manners

[0040] The following further elaborates on the present application in conjunction with the attached Figures 1-9 for a more detailed description.

[0041] When building a bridge, according to the width of the bridge, multiple pre-cast simply supported small box girder bodies 02 need to be installed on the capping beam. Then, the adjacent simply supported small box girder bodies 02 are arranged at intervals, and connecting steel bars 1 are provided on the sides of the adjacent simply supported small box girder bodies 02. Finally, the corresponding connecting steel bars 1 are welded through reinforcing steel bars, and vertical steel bars are tied to the connecting steel bars 1. The vertical steel bars are arranged along the length direction of the simply supported small box girder body 02. Finally, the formwork is installed, and concrete is poured above the formwork, and finally, the adjacent two simply supported small box girder bodies 02 are fixed together. In order to facilitate the fixation of the connecting steel bars 1 on the adjacent two simply supported small box girder bodies 02, on the one hand, the connection structure of the simply supported small box girder is disclosed in the embodiment of the present application.

[0042] Refer to Figure 1 and Figure 2, the connection structure of the simply supported small box girder includes connecting steel bars 1 embedded on the side of the simply supported small box girder body 02. The second connecting steel bar 01 is embedded on the outermost simply supported small box girder body 02, and the second connecting steel bar 01 is bent away from the simply supported small box girder body 02, which is convenient for pouring the guardrail on the simply supported small box girder body 02. Connecting steel bars 1 are arranged on both sides of the simply supported small box girder body 02 in the middle position, which is convenient for connecting two adjacent simply supported small box girder bodies 02.

[0043] Refer to Figure 1 and Figure 2 , in this embodiment, taking the installation of two simply supported small box girder bodies 02 as an example, in order to better distinguish two adjacent simply supported small box girder bodies 02, two adjacent simply supported small box girder bodies 02 are defined. The simply supported small box girder body 02 first installed on the cap beam is the first simply supported small box girder body, and the other is the second simply supported small box girder body. A plurality of connecting steel bars 1 are arranged on the side of the first simply supported small box girder body and the second simply supported small box girder body close to each other. The connecting steel bars 1 are arranged horizontally, and a plurality of connecting steel bars 1 are evenly spaced along the length direction of the second simply supported small box girder body or the first simply supported small box girder body. At the same time, the second connecting steel bar 01 is arranged on the side of the first simply supported small box girder body and the second simply supported small box girder body away from each other, which is convenient for pouring the guardrail.

[0044] Refer to Figure 1 and Figure 2 , the connecting steel bar 1 includes a first horizontal part 11, a second horizontal part 12 and a bending part 13. The first horizontal part 11, the bending part 13 and the second horizontal part 12 are connected end to end in sequence to form a U shape. At the same time, the ends of the first horizontal part 11 and the second horizontal part 12 far from the bending part 13 are embedded in the simply supported small box girder body 02.

[0045] Refer to Figure 2 and Figure 3 , a connecting plate 2 is arranged on the side of the second simply supported small box girder body. The connecting plate 2 is sleeved on the first horizontal part 11, and the connecting plate 2 can be fixedly installed on the second simply supported small box girder body by prefabrication; in other embodiments, when connecting steel bars 1 are arranged on both sides of a simply supported small box girder body 02, the connecting plate 2 is arranged on one side of the connecting steel bar 1, and the connecting plate 2 is not arranged on the other side, so as to be convenient for connecting with the adjacent simply supported small box girder body 02. Since a plurality of connecting steel bars 1 are arranged on the second simply supported small box girder body, and at the same time a plurality of connecting plates 2 are also arranged, a plurality of connecting plates 2 and a plurality of connecting steel bars 1 correspond one by one.

[0046] Refer to Figure 3 and Figure 4, a receiving cavity 21 with an opening facing the second horizontal portion 12 is formed in the connecting plate 2, and one end of the receiving cavity 21 away from the second simply supported small box girder body communicates with the outside, and the other end is defined as surface A 22, and surface A 22 is also the end surface of the receiving cavity 21.

[0047] Referring to Figure 5 and Figure 6 , a driving member 3 is provided on the connecting plate 2. In this embodiment, the driving member 3 is set as a driving sleeve 31. The driving sleeve 31 is arranged in the receiving cavity 21 and rotates in the receiving cavity 21. The driving sleeve 31 is used to sleeved on the first horizontal portion 11 of the first simply supported small box girder body; at the same time, a relief groove 23 is formed in the driving sleeve 31. The relief groove 23 is opened along the axial direction of the driving sleeve 31. In the initial state of the driving sleeve 31, the relief groove 23 corresponds to the opening of the receiving cavity 21, facilitating the bending portion 13 on the first simply supported small box girder body to move along the length direction of the relief groove 23.

[0048] Referring to Figure 5 and Figure 6 , a limiting plate 4 is provided on the driving sleeve 31. The limiting plate 4 is arranged along the length direction of the relief groove 23 and is welded to the driving sleeve 31. Under the action of the limiting plate 4, the width of the relief groove 23 on the limiting plate 4 becomes smaller. In this embodiment, the length of the limiting plate 4 is less than the length of the relief groove 23; when rotating the driving sleeve 31, the driving sleeve 31 can drive the limiting plate 4 to rotate, which is more convenient in use.

[0049] Referring to Figure 3 and Figure 6 , when installing the second simply supported small box girder body, align the receiving cavity 21 on the connecting plate 2 with the first horizontal portion 11 on the first simply supported small box girder body, and then translate the second simply supported small box girder body to move the connecting plate 2 towards the direction close to the first simply supported small box girder body, so that the bending portion 13 moves in the opening of the receiving cavity 21. At this time, the first horizontal portion 11 is inside the driving sleeve 31, and the bending portion 13 extends out of the connecting plate 2 from the relief groove 23 and the opening of the receiving cavity 21. Then when the surface of the bending portion 13 on the first simply supported small box girder body facing away from the first horizontal portion 11 abuts against surface A 22 of the receiving cavity 21, the installation of the second simply supported small box girder body is completed and it is placed on the capping beam; then rotate the driving sleeve 31 by ninety degrees, and the driving sleeve 31 drives the limiting plate 4 to rotate. At this time, the relief groove 23 on the driving sleeve 31 no longer corresponds to the opening of the receiving cavity 21, thereby preventing the first horizontal portion 11 on the first simply supported small box girder body from detaching from the opening of the receiving groove.

[0050] Referring to Figure 3 and Figure 6, while the driving sleeve 31 rotates, it drives the limiting plate 4 to rotate. At this time, the limiting plate 4 rotates between the first horizontal part 11 and the second horizontal part 12, so that the end surface of the limiting plate 4 away from the first simply supported small box girder body abuts against the surface of the bending part 13 close to the first horizontal part 11. At the same time, since the bending part 13 on the first simply supported small box girder body also abuts against the A surface 22, the bending part 13 can be clamped between the end surface of the limiting plate 4 and the A surface 22, thereby preventing relative movement between the connecting plate 2 and the first horizontal part 11 on the first simply supported small box girder body, and thus fixing the connecting steel bars 1 on the first simply supported small box girder body and the second simply supported small box girder body, which is convenient for subsequent pouring.

[0051] Refer to Figure 6 and Figure 7 , an adjusting ring 41 is welded on the driving sleeve 31. The adjusting ring 41 and the driving sleeve 31 are coaxially arranged. A second relief groove is formed on the connecting plate 2. The adjusting ring 41 rotates in the second relief groove and extends out of the upper surface of the connecting plate 2 through the second relief groove, which is convenient for the staff to rotate the adjusting ring 41, and thus it is more convenient to adjust the rotation of the driving sleeve 31.

[0052] Refer to Figure 6 and Figure 7 , a locking surface 42 is formed on the adjusting ring 41. When the adjusting ring 41 rotates 90 degrees, the locking surface 42 is parallel to the upper surface of the connecting plate 2. At this time, the locking surface 42 is lower than the upper surface of the connecting plate 2; at the same time, an installation groove 43 is formed on the connecting plate 2. The installation groove 43 communicates with the second relief groove and is arranged along the length direction of the connecting plate 2. A locking plate 5 is arranged in the installation groove 43. The locking plate 5 slides along the length direction of the connecting plate 2 in the installation groove 43; when the locking surface 42 is parallel to the upper surface of the connecting plate 2, the locking plate 5 is pushed so that the lower surface of the locking plate 5 abuts against the locking surface 42, so that the adjusting ring 41 cannot rotate on the connecting plate 2, and thus the positions of the adjusting ring 41 and the driving sleeve 31 are fixed.

[0053] Refer to Figure 6 and Figure 7 , in order to facilitate the movement of the locking plate 5, an elastic pushing member 51 is arranged in the installation groove 43. In this embodiment, the elastic pushing member 51 is arranged as a pushing spring. One end of the pushing spring is welded on the inner wall of the installation groove 43, and the other end is welded on the locking plate 5. When the relief groove 23 corresponds to the opening of the accommodating cavity 21, the end of the locking plate 5 away from the pushing spring abuts against the end surface of the adjusting ring 41. At this time, the pushing spring is in a compressed state. Then the adjusting ring 41 is rotated. When the locking surface 42 is parallel to the upper surface of the connecting plate 2, under the action of the pushing spring, the locking plate 5 is pushed to move, so that the lower surface of the locking plate 5 abuts against the locking surface 42, thus making it more convenient to fix the position of the adjusting ring 41.

[0054] Reference Figure 6 and Figure 8 , on one side of the connecting plate 2 close to the first simply supported small box girder body, a fixing component 6 is provided. The fixing component 6 is used to fix the vertical steel bars, replacing the traditional binding. The fixing component 6 includes a first fixing seat 61 and a second fixing seat 62, and a fixing rod 63 welded to the end face of the connecting plate 2. The fixing rod 63 is horizontally arranged, and the cross-section of the fixing rod 63 in the vertical direction is rectangular to prevent the second fixing seat 62 from rotating on the fixing rod 63. A clamping groove for placing the vertical steel bars is formed between the first fixing seat 61 and the second fixing seat 62. At the same time, the first fixing seat 61 is welded to the fixing rod 63, and the second fixing seat 62 is slidably connected to the fixing rod 63, and the second fixing seat 62 is arranged between the first fixing seat 61 and the connecting plate 2.

[0055] Reference Figure 6 and Figure 8 , when installing the vertical steel bars, slide the second fixing seat 62 in a direction away from the first fixing seat 61 to increase the distance between the second fixing seat 62 and the first fixing seat 61, and then it is convenient to place the vertical steel bars between the first fixing seat 61 and the second fixing seat 62. In this embodiment, a support plate 52 is provided at one end of the first fixing seat 61 close to the first horizontal part 11. Through the setting of the support plate 52, the vertical steel bars placed between the first fixing seat 61 and the second fixing seat 62 can be prevented from separating. In order to improve the fixing strength of the vertical steel bars, an elastic rubber sleeve 53 is bonded to the second fixing seat 62. When the driving sleeve 31 rotates 90 degrees, the elastic rubber sleeve 53 is in a compressed state.

[0056] Reference Figure 6 , Figure 8 and Figure 9 , a second driving member 7 is provided at one end of the driving sleeve 31 away from the second simply supported small box girder body. When the vertical steel bars are installed between the first fixing seat 61 and the second fixing seat 62, the second driving member 7 is used to push the second fixing seat 62 in a direction close to the first fixing seat 61, so that the second fixing seat 62 abuts against the surface of the vertical steel bars and squeezes the vertical steel bars, thereby realizing the fixing of the vertical steel bars.

[0057] Reference Figure 6 , Figure 8 and Figure 9, the second driving member 7 is provided with an arc-shaped driving plate 71. The arc-shaped driving plate 71 is arranged between the second fixed seat 62 and the end face of the connecting plate 2 facing away from the end face of the second simply supported small box girder body. The arc-shaped driving plate 71 is welded to the end face of the driving sleeve 31, and the driving plate is arranged along the circumferential direction of the driving sleeve 31. In this embodiment, the arc-shaped driving plate 71 is arranged along the circumferential direction of the driving sleeve 31 by 90 degrees, thus forming two end faces, which are respectively defined as the B surface 8 and the C surface 81. At the same time, a guiding surface 82 is opened on the arc-shaped driving plate 71. The guiding surface 82 is inclined gradually in the direction approaching the end face of the driving sleeve 31 along the circumferential direction of the driving sleeve 31 from the B surface 8 to the C surface 81, so that the cross-sectional area of the B surface 8 is larger than that of the C surface 81.

[0058] Refer to Figure 6 , Figure 8 and Figure 9 , when the relief groove 23 on the driving sleeve 31 corresponds to the opening of the receiving cavity 21 of the connecting plate 2, at this time, the arc-shaped driving plate 71 is not between the second fixed seat 62 and the end face of the connecting plate 2; when the driving sleeve 31 rotates, the driving sleeve 31 drives the arc-shaped driving plate 71 to rotate, so that the C surface 81 of the arc-shaped driving plate 71 first rotates between the second fixed seat 62 and the end face of the connecting plate 2, and then as the cross-section of the arc-shaped driving plate 71 between the second fixed seat 62 and the end face of the connecting plate 2 gradually increases, the second fixed seat 62 is pushed to move in the direction of the first fixed seat 61; when the locking surface 42 is parallel to the upper surface of the connecting plate 2, the vertical steel bars are clamped between the first fixed seat 61 and the second fixed seat 62.

[0059] In addition, in other embodiments, a connecting plate 2 can also be provided on the second horizontal part 12 of the first simply supported small box girder body, so as to fix the second horizontal part 12 on the second simply supported small box girder body to the connecting plate 2 on the first simply supported small box girder body, and improve the fixing strength of two adjacent simply supported small box girder bodies 02.

[0060] The implementation principle of the connection structure of the simply supported small box girder in the embodiment of the present application is as follows: when installing the simply supported small box girder body 02, first install the simply supported small box girder body 02 with the second connecting steel bar 01 on the side of the capping beam. When installing the adjacent simply supported small box girder body 02, make the connecting plate 2 on the adjacent second simply supported small box girder body correspond to the first horizontal part 11 on the first simply supported small box girder body, and then translate the second simply supported small box girder body so that the first horizontal part 11 on the first simply supported small box girder body is inserted into the driving sleeve 31. At this time, the bent part 13 on the first simply supported small box girder body abuts against the A surface 22.

[0061] The vertical steel bars are placed between the first fixed seat 61 and the second fixed seat 62, and the driving sleeve 31 is rotated by adjusting the ring 41. The driving sleeve 31 drives the limit plate 4 to rotate, so that the limit plate 4 abuts against the bending portion 13 away from the surface of the second simply supported small box beam body. At the same time, under the action of the arc driving plate 71, the second fixed seat 62 is pushed to move toward the first fixed seat 61 to fix the vertical steel bars, thereby realizing the simultaneous fixation of the vertical steel bars and the first horizontal steel bars by the rotating driving sleeve 31, which is more convenient when connecting two adjacent simply supported small box beam bodies 02.

[0062] In a second aspect, the present application also discloses a construction method of a simply supported small box girder, comprising the following steps:

[0063] S1: Make the adjacent simply supported small box girder body 02 and the installed simply supported small box girder body 02 have the same height, and the end surface opening of the accommodating cavity 21 on the connecting plate 2 corresponds to the first horizontal portion 11 on the installed simply supported small box girder body 02;

[0064] S2: Horizontally move the simply supported small box beam body 02, so that the first horizontal portion 11 on the simply supported small box beam body 02 after installation moves into the driving sleeve 31 through the clearance groove 23;

[0065] S3: placing the vertical steel bar between the first fixing seat 61 and the second fixing seat 62;

[0066] S4: Rotate the adjusting ring 41, and the adjusting ring 41 drives the driving sleeve 31 and the arc-shaped driving plate 71 installed on the driving sleeve 31 to rotate.

[0067] The implementation principle of the construction method of the simply supported small box girder of the embodiment of the present application is as follows: first install a simply supported small box girder body 02, then make the adjacent simply supported small box girder body 02 and the installed simply supported small box girder body 02 have the same height, and make the end face opening of the accommodating cavity 21 on the connecting plate 2 correspond to the first horizontal portion 11 on the installed simply supported small box girder body 02, then move the simply supported small box girder body 02, so that the first horizontal portion 11 moves into the driving sleeve 31, and at the same time place the vertical steel bar between the first fixed seat 61 and the second fixed seat 62, so that the driving sleeve 31 rotates, and the driving sleeve 31 drives the arc driving plate 71 to rotate, and the arc driving plate 71 pushes the second fixed seat 62 to move in the direction close to the first fixed seat 61, thereby simultaneously limiting the vertical steel bar and the first horizontal portion 11, which is more convenient to use.

[0068] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A connection structure of a simply supported small box girder, comprising a connection steel bar (1) pre-buried in a simply supported small box girder body (02), wherein the connection steel bar (1) comprises a first horizontal portion (11), a second horizontal portion (12) and a bent portion (13), Features: A connecting plate (2) is provided on a simply supported small box girder body (02); a receiving cavity (21) is provided on the connecting plate (2) and its opening faces the second horizontal portion (12); the first horizontal portion (11) on an adjacent simply supported small box girder body (02) is inserted into the receiving cavity (21); a limiting plate (4) is provided on the connecting plate (2); a driving member (3) is provided on the connecting plate (2); the driving member (3) is used to drive the limiting plate (4) to abut against a surface of a bending portion (13) on an adjacent simply supported small box girder body (02) close to the first horizontal portion (11); The driving member (3) is configured as a driving sleeve (31), the driving sleeve (31) being sleeved on the first horizontal portion (11), and the driving sleeve (31) rotating in a receiving cavity (21) on the connecting plate (2), and the driving sleeve (31) is provided with a clearance groove (23) for the bending portion (13) to slide in the driving sleeve (31).

2. The connection structure of the simply supported small box beam according to claim 1, Features: An adjusting ring (41) is fixedly mounted on the driving sleeve (31), the adjusting ring (41) protrudes from the surface of the connecting plate (2), and the adjusting ring (41) is rotatably connected to the connecting plate (2).

3. The connection structure of the simply supported small box beam according to claim 2, Features: A locking plate (5) is slidably connected to the connecting plate (2), and the locking plate (5) slides along the length direction of the connecting plate (2). A locking surface (42) is provided on the adjusting ring (41), and the locking plate (5) is used to abut against the locking surface (42).

4. The connection structure of the simply supported small box beam according to claim 3, Features: An elastic pusher (51) is mounted on the connecting plate (2) and is used to push the surface of the locking plate (5) to abut against the locking surface (42). One end of the elastic pusher (51) is fixedly mounted on the connecting plate (2), and the other end is fixedly mounted on the locking plate (5).

5. The connection structure of the simply supported small box beam according to claim 4, Features: A fixing assembly (6) is provided on the connecting plate (2), and the fixing assembly (6) is used to fix the vertical steel bars on the connecting steel bars (1).

6. The connection structure of the simply supported small box beam according to claim 5, Features: The fixing assembly (6) comprises a fixing rod (63) arranged on the connecting plate (2), a first fixing seat (61) mounted on the fixing rod (63), and a second fixing seat (62) sliding on the fixing rod (63); the vertical steel bar is arranged between the first fixing seat (61) and the second fixing seat (62); the driving sleeve (31) is provided with a second driving member (7) for driving the second fixing seat (62) to move in a direction close to the first fixing seat (61); and the second driving member (7) causes the second fixing seat (62) to abut against the surface of the vertical steel bar.

7. The connection structure of the simply supported small box beam according to claim 6, Features: An elastic rubber sleeve (53) is provided on one side of the second fixing seat (62) close to the first fixing seat (61).

8. The connection structure of the simply supported small box beam according to claim 6, Features: The second driving member (7) is configured as an arc-shaped driving plate (71), and a guide surface (82) is provided on the arc-shaped driving plate (71). The guide surface (82) is inclined gradually approaching the end surface of the driving sleeve (31) along the circumferential direction of the driving sleeve (31), so that the area of ​​one end of the arc-shaped driving plate (71) is larger than the area of ​​the other end.

9. Construction method of simply supported small box beam, Features: The connection structure of the simply supported small box beam as claimed in claim 6 comprises the following steps: S1: making the adjacent simply supported small box girder bodies (02) and the installed simply supported small box girder body (02) have the same height, and the end surface opening of the accommodating cavity (21) on the connecting plate (2) corresponds to the first horizontal portion (11) on the installed simply supported small box girder body (02); S2: Horizontally moving the simply supported small box beam body (02) so that the first horizontal portion (11) on the installed simply supported small box beam body (02) moves into the driving sleeve (31) through the clearance groove (23); S3: placing the vertical steel bars between the first fixing seat (61) and the second fixing seat (62); S4: Rotate the adjusting ring (41), the adjusting ring (41) drives the driving sleeve (31) and the arc-shaped driving plate (71) mounted on the driving sleeve (31) to rotate.

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