A combined structure of prefabricated prestressed beam body and cast-in-place beam

Abstract

The present invention discloses a combination structure of a prefabricated prestressed beam body and a cast-in-place beam, comprising two prestressed beam bodies, a steel frame is installed between the two prestressed beam bodies through a first connecting assembly; two side steel plates and a second connecting assembly are arranged between the two prestressed beam bodies; and both side steel plates are connected to the steel frame through a third connecting assembly. The present invention sets the mutual cooperation among the prestressed beam body, the first connecting assembly, the steel frame, the second connecting assembly, and the third connecting assembly. The steel frame is directly fixedly installed between the two prestressed beam bodies through the first connecting assembly, and cooperates with the arranged side steel plates to build a frame structure of a cast-in-place beam. During the construction process, it is not necessary to set up ground support equipment and can be used. During grouting, the steel frame and the steel plate are firmly combined with the prestressed beam body through the cooperation of the first connecting assembly, the second connecting assembly, and the third connecting assembly, and the operation is simple and convenient.

Description

Technical Field

[0001] The invention relates to the technical field of construction, and in particular to a combined structure of a prefabricated prestressed beam body and a cast-in-place beam. Background Art

[0002] The precast prestressed beam body is a beam that is pre-stressed in a concrete structure, aiming to reduce or offset the tensile stress in use, thereby preventing structural damage and improving the stiffness and durability of the component. The specific working principle of the prestressed beam body is to pre-apply a force to the beam during concrete construction to generate a negative bending moment in the mid-span, thereby partially offsetting the positive bending moment of the beam in use. This prestressed state forms a rebound extrusion by tensioning the prestressed tendons, so that the cross section of the concrete is subjected to a certain amount of uniformly distributed internal pressure before it is put into use; in this way, the prestressed beam body can avoid or delay concrete cracking, thereby improving the durability and service life of the structure, while the cast-in-place beam refers to a beam that is made by tying steel bars and supporting formwork at the construction site, and then pouring concrete on site; the connection method between the precast prestressed beam body and the cast-in-place beam is widely used in bridges and building structures, and it is usually chosen to cast a cast-in-place beam between two precast prestressed beam bodies to achieve the connection.

[0003] The shortcomings of the prior art are that when a cast-in-place beam is set between two prefabricated beams, a certain support structure needs to be set on the ground to mold the external mold of the cast-in-place beam. If the cast-in-place beam is above a traffic road, the set support structure may affect certain traffic conditions, and after the cast-in-place beam is formed, it needs to be disassembled, which is very troublesome to operate, has a long construction period, and has certain inconveniences. Summary of the invention

[0004] The object of the present invention is to provide a combination structure of a prefabricated prestressed beam body and a cast-in-place beam to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a combination structure of a prefabricated prestressed beam body and a cast-in-place beam, comprising two prestressed beam bodies, a steel frame is installed between the two prestressed beam bodies through a first connecting component; two side steel plates and a second connecting component are arranged between the two prestressed beam bodies; both side steel plates are connected to the steel frame through a third connecting component; the first connecting component comprises a plurality of supporting steel bars fixedly connected to the side steel plates, and each of the supporting steel bars is provided with a sleeve.

[0006] As a further description of the above technical solution:

[0007] A plurality of groups of barbed steel bars are cast on the sides of the two prestressed beam bodies that are close to each other, and each sleeve is sleeved on the corresponding barbed steel bar.

[0008] As a further description of the above technical solution:

[0009] The second connection assembly includes a casting platform cast on the side of the two prestressed beam bodies close to each other; a plurality of mounting holes are arranged on both casting platforms, and a same connecting steel bar is arranged between two corresponding mounting holes.

[0010] As a further description of the above technical solution:

[0011] The third connection assembly includes a plurality of groups of extended steel bars fixedly connected to the side steel plates; the bottom end of each of the extended steel bars is fixedly connected to a connection frame, and the interior of the connection frame is connected to a crossbeam rib via a spring.

[0012] As a further description of the above technical solution:

[0013] The steel frame is provided with a plurality of special-shaped limiting grooves, and each of the connecting frames is slidably connected in the corresponding special-shaped limiting grooves.

[0014] As a further description of the above technical solution:

[0015] A fourth connecting component is arranged between the two sides of the steel frame and between the steel plates on both sides. The fourth connecting component includes a vertical groove and multiple groups of transverse grooves opened on the steel frame and the side steel plates; the multiple groups of transverse grooves are connected to the vertical grooves, and limiting steel bars are arranged between the corresponding two transverse grooves, and both ends of the limiting steel bars are arranged to be bent.

[0016] As a further description of the above technical solution:

[0017] A plurality of positioning holes are provided in each of the plurality of transverse grooves, and the bent ends of the plurality of limiting steel bars are clamped in the corresponding positioning holes.

[0018] As a further description of the above technical solution:

[0019] The connecting steel bars are arranged below the limiting steel bars, and the two are stacked alternately in sequence.

[0020] As a further description of the above technical solution:

[0021] A guide assembly is arranged between the side steel plate and the prestressed beam body, and the guide assembly includes a limit block fixedly connected to the side surface of the side steel plate; a connecting groove is opened on the prestressed beam body, and the limit block is slidably connected in the connecting groove.

[0022] As a further description of the above technical solution:

[0023] The limit block is provided with a plurality of recesses and grouting holes, and the grouting holes are communicated with the recesses.

[0024] In the above technical solution, the combined structure of a prefabricated prestressed beam body and a cast-in-place beam provided by the present invention has the following beneficial effects:

[0025] The present invention sets mutual cooperation among the prestressed beam body, the first connecting component, the steel frame, the second connecting component and the third connecting component. The steel frame is directly fixedly installed between the two prestressed beam bodies through the first connecting component, and cooperates with the side steel plates to build a frame structure of a cast-in-place beam. During the construction process, it is not necessary to set up ground support equipment before use. During grouting, the steel frame and the steel plate are firmly combined with the prestressed beam body through the cooperation of the first connecting component, the second connecting component and the third connecting component. The operation is simple and convenient. The formed steel frame and the side steel plates do not need to be disassembled. The two can protect the outer wall of the cast-in-place beam, and the rupture of the cast-in-place beam can be avoided in the later stage.

[0026] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0027] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0029] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of a local structure provided by an embodiment of the present invention;

[0031] Figure 3 A schematic diagram of the overall structure of a prestressed beam body provided in an embodiment of the present invention;

[0032] Figure 4 A schematic diagram of the connection structure between the steel frame and the side steel plate provided in an embodiment of the present invention;

[0033] Figure 5 A schematic diagram of a steel frame structure provided by an embodiment of the present invention;

[0034] Figure 6 A cross-sectional schematic diagram of a steel frame structure provided by an embodiment of the present invention;

[0035] Figure 7A schematic diagram of the side steel plate structure provided by an embodiment of the present invention;

[0036] Figure 8 A schematic longitudinal section diagram of a side steel plate structure provided by an embodiment of the present invention;

[0037] Fig. 9 for Figure 5 Enlarged view of point A in the middle.

[0038] Fig.10 for Figure 8 Enlarged view of point B in the middle.

[0039] Description of reference numerals:

[0040] 1. Prestressed beam body; 2. Steel frame; 3. Side steel plate; 41. Support steel bar; 42. Sleeve; 5. Barbed steel bar; 61. Casting platform; 62. Mounting hole; 63. Connecting steel bar; 71. Extension steel bar; 72. Connecting frame; 73. Spring; 74. Crossbeam bar; 8. Special-shaped limiting groove; 91. Vertical groove; 92. Horizontal groove; 93. Limiting steel bar; 10. Positioning hole; 111. Limiting block; 112. Connecting groove; 12. Grouting hole. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0042] See also Figure 1-10The present embodiment provides a combination structure of a prefabricated prestressed beam body 1 and a cast-in-place beam, comprising two prestressed beam bodies 1. The prestressed beam body 1 is a pre-prepared crossbeam structure. After being installed on a column, a cast-in-place beam is arranged between the two prestressed beam bodies 1 for combination, thereby forming a complete plane structure. A steel frame 2 is installed between the two prestressed beam bodies 1 through a first connecting component; two side steel plates 3 and a second connecting component are arranged between the two prestressed beam bodies 1. The steel frame 2 and the side steel plates 3 are both required to be provided with an anti-corrosion coating to prevent rust and oxidation during use. When grouting, a top cover is required to be provided on the top of the steel frame 2 so that after the concrete is poured to the height of the steel frame 2, no more concrete needs to be poured, and the two side steel plates 3 can be grouted normally. The mortar is provided with a removable cover plate so that the concrete vibrator can directly enter the concrete inside the steel frame 2 to vibrate and defoam when pouring glue, without having to enter the side of the steel frame 2 through the space between the side steel plates 3. The second connecting component arranged between the two prestressed beam bodies 1 is to increase the connectivity between the two prestressed beam bodies 1; the steel plates 3 on both sides are connected to the steel frame 2 through the third connecting component, and the third connecting component is arranged between the side steel plates 3 and the steel frame 2 to increase the connectivity between the side steel plates 3 and the steel frame 2; the first connecting component includes a plurality of supporting steel bars 41 fixedly connected to the side steel plates 3, each supporting steel bar 41 is provided with a sleeve 42, and the supporting steel bar 41 is arranged at the bottom of the steel frame 2 for supporting and fixing the sleeve 42.

[0043] In an embodiment further provided by the present invention, multiple groups of barb steel bars 5 are cast on the sides of the two prestressed beam bodies 1 that are close to each other, and each sleeve 42 is sleeved on the corresponding barb steel bar 5. The barb steel bar 5 is asynchronously cast inside the prestressed beam body 1 when it is prepared, and one end extending out of the prestressed beam body 1 is bent upward. When installing the steel frame 2, the support steel bar 41 and the barb steel bar 5 need to be staggered and installed until the sleeve 42 set on the support steel bar 41 is higher than the corresponding barb steel bar 5. The position of the steel frame 2 is moved horizontally until the sleeve 42 moves to just above the barb steel bar 5, and the lifting force on the steel frame 2 is released, so that the steel frame 2 drops due to gravity until the sleeve 42 is sleeved on the barb steel bar 5. At this time, the barb steel bar 5 is connected through the sleeve 42 to fix the steel frame 2 between the two prestressed beam bodies 1. No other ground support equipment is required to install the steel frame 2 between the two prestressed beam bodies 1, and the operation is simple and convenient.

[0044] Furthermore, the second connecting component includes a casting platform 61 cast on the side where the two prestressed beam bodies 1 are close to each other; a plurality of mounting holes 62 are arranged on the two casting platforms 61, and the same connecting steel bar 63 is arranged between the two corresponding mounting holes 62. The casting platform 61 and the barbed steel bar 5 are arranged on the same side of the prestressed beam body 1, but the extending length of the casting platform 61 is less than the extending length of the barbed steel bar 5, and the two ends of the connecting steel bar 63 are also arranged in a curved shape so that they can be stuck in the mounting holes 62 of the two casting platforms 61, thereby increasing the connectivity between the two prestressed beam bodies 1.

[0045] Furthermore, the third connecting component includes a plurality of groups of extended steel bars 71 fixedly connected to the side steel plate 3; the bottom end of each extended steel bar 71 is fixedly connected to a connecting frame 72, and the interior of the connecting frame 72 is connected to a crossbeam 74 via a spring 73. The extended steel bars 71 are provided to fix the connecting frame 72 to the bottom of the side steel plate 3, and the crossbeam 74 squeezes the spring 73 and slides inside the connecting frame 72 after being subjected to external force.

[0046] In the embodiment further provided by the present invention, a plurality of special-shaped limiting grooves 8 are provided in the steel frame 2, and each connecting frame 72 is slidably connected in the corresponding special-shaped limiting groove 8. The special-shaped limiting groove 8 is composed of an inclined circular groove and a cylindrical groove. The inclined circular groove part of the special-shaped limiting groove 8 is used to push the crossbeam rib 74 in the connecting frame 72 to move, so as to facilitate the connecting frame 72 to enter the cylindrical groove of the special-shaped limiting groove 8. At this time, the crossbeam rib 74 stretches under the action of the spring 73, which facilitates the improvement of the hardness of the concrete in the special-shaped limiting groove 8 after grouting and also increases the connectivity between the side steel plate 3 and the steel frame 2.

[0047] In the embodiment provided by the present invention, a fourth connecting component is provided between the two sides of the steel frame 2 and between the steel plates 3 on both sides. The fourth connecting component includes a vertical groove 91 and a plurality of transverse grooves 92 opened on the steel frame 2 and the side steel plates 3; the plurality of transverse grooves 92 are connected to the vertical groove 91, and a limiting steel bar 93 is provided between the corresponding two transverse grooves 92. Both ends of the limiting steel bar 93 are provided in a curved shape, and the transverse grooves 92 are correspondingly provided on both sides of the vertical groove 91. By providing the vertical groove 91, it is convenient for the limiting steel bar 93 to enter the transverse groove 92. By providing the limiting steel bar 93, the connectivity between the two sides of the steel frame 2 and the steel plates 3 on both sides can be increased.

[0048] Specifically, a plurality of positioning holes 10 are provided in each of the plurality of transverse grooves 92 , and the bent ends of a plurality of limiting steel bars 93 are clamped in the corresponding positioning holes 10 . By providing the positioning holes 10 , the position of the limiting steel bars 93 in the transverse grooves 92 can be limited.

[0049] In the solution further provided by the present invention, the connecting steel bar 63 is arranged below the limiting steel bar 93 to facilitate supporting the limiting steel bar 93, and the two are stacked in an alternating manner in sequence. The alternating manner in which the two are stacked in an alternating manner in sequence can increase the stability and firmness of the connection between the two prestressed beam bodies 1, the steel frame 2 and the side steel plates 3, and the force is evenly applied to each location.

[0050] In the solution further provided by the present invention, a guide assembly is arranged between the side steel plate 3 and the prestressed beam body 1, and the guide assembly includes a limit block 111 fixedly connected to the side surface of the side steel plate 3; a connecting groove 112 is opened on the prestressed beam body 1, and the limit block 111 is slidably connected in the connecting groove 112. By setting the limit block 111 and the connecting groove 112, the side steel plate 3 can be pre-fixed and supported.

[0051] In the solution further provided by the present invention, a plurality of depressions and grouting holes 12 are provided on the limit block 111, and the grouting holes 12 are connected to the depressions. The depressions are provided on the limit block 111 to facilitate the entry of concrete between the limit block 111 and the connecting groove 112, thereby increasing the connectivity between the two and achieving a stable combination.

[0052] Working principle: The working method is to first fix the two prestressed beam bodies 1 on the columns of the installation site, then take out the appropriate steel frame 2, and lift the steel frame 2 by starting the external lifting equipment. When lifting, it is necessary to ensure that the supporting steel bars 41 on the steel frame 2 are staggered with the extended hook steel bars 5, until the sleeve 42 set on the supporting steel bar 41 is higher than the corresponding hook steel bar 5, move the steel frame 2 horizontally until the sleeve 42 on the supporting steel bar 41 moves to the top of the hook steel bar 5, release the lifting force on the steel frame 2, so that the steel frame 2 drops due to gravity until the sleeve 42 is sleeved on the hook steel bar 5, and the hook steel bar 5 is connected through the sleeve 42 to fix the steel frame 2 between the two prestressed beam bodies 1;

[0053] At this time, the connecting steel bars 63 are manually installed on the mounting holes 62 on the two casting platforms 61. After one side is arranged, the limiting steel bars 93 between the steel frames 2 are installed. During installation, the limiting steel bars 93 are placed in the vertical grooves 91 and moved, and then moved to the appropriate horizontal grooves 92, and finally stuck in the positioning holes 10 in the horizontal grooves 92. The operation is repeated until it is installed on the top of the steel frame 2, and then the side steel plates 3 are lifted, and the limiting blocks 111 on both sides of the side steel plates 3 are aligned with the connecting grooves 112 on the prestressed beam body 1 for installation. When the side steel plates 3 are lowered between the two prestressed beam bodies 1, the connecting frame 72 set on the supporting steel bars 41 at the bottom of the side steel plates 3 will enter the steel frame 2 through the gap between the connecting steel bars 63 and the limiting steel bars 93. When the cross beam ribs 74 on the connecting frame 72 contact the inclined circular groove part of the special-shaped limiting grooves 8 in the steel frame 2, the cross beam ribs 74 will be affected by the inclined surface to squeeze the spring 73 and move forward The cam 72 is inserted into the interior of the connecting frame 72 until the connecting frame 72 moves to the cylindrical groove part of the special-shaped limiting groove 8, and the cross beam rib 74 extends out under the action of the restoring force of the spring 73. At this time, the connecting steel bars 63 between the prestressed beam body 1 and the limiting steel bars 93 between the two side plates are repeatedly installed. During installation, it is necessary to install a corrugated pipe at a suitable height between the connecting steel bars 63 and the limiting steel bars 93 to facilitate the later installation of the prestressed steel bars. After the steel bars of the cast-in-place beam are installed, concrete can be poured on its installation part. When pouring, pouring is carried out from between the steel plates 3 on both sides. The poured concrete flows into the steel frame 2, and a concrete vibrator is used to vibrate and cooperate with the pouring through the steel frame 2, that is, the two sides of the two side steel plates 3. When the concrete layer reaches the height of the steel frame 2, the top of the steel frame 2 is sealed except for the top between the steel plates 3 on both sides. At this time, the poured concrete will be directly left in the space between the two side steel plates 3 for filling and pouring.

[0054] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A combination structure of a prefabricated prestressed beam body (1) and a cast-in-place beam, comprising two prestressed beam bodies (1), characterized in that: A steel frame (2) is installed between the two prestressed beam bodies (1) via a first connection assembly; two side steel plates (3) and a second connection assembly are arranged between the two prestressed beam bodies (1); The two side steel plates (3) are connected to the steel frame (2) via a third connecting assembly; The first connection assembly comprises a plurality of support steel bars (41) fixedly connected to the side steel plate (3), and each of the support steel bars (41) is provided with a sleeve (42); A plurality of groups of barbed steel bars (5) are cast on the sides of the two prestressed beam bodies (1) close to each other, and each sleeve (42) is sleeved on the corresponding barbed steel bar (5); The second connection assembly comprises a casting platform (61) cast on one side of the two prestressed beam bodies (1) close to each other; A plurality of mounting holes (62) are provided on each of the two casting platforms (61), and a same connecting steel bar (63) is provided between two corresponding mounting holes (62); The third connection assembly comprises a plurality of groups of extended steel bars (71) fixedly connected to the side steel plates (3); The bottom end of each of the extended steel bars (71) is fixedly connected to a connection frame (72), and the interior of the connection frame (72) is connected to a crossbeam rib (74) via a spring (73).

2. The combination structure of a prefabricated prestressed beam body (1) and a cast-in-place beam according to claim 1, characterized in that: A plurality of special-shaped limiting grooves (8) are provided in the steel frame (2), and each of the connecting frames (72) is slidably connected in a corresponding special-shaped limiting groove (8).

3. The combination structure of a prefabricated prestressed beam body (1) and a cast-in-place beam according to claim 1, characterized in that: A fourth connection assembly is provided between the two sides of the steel frame (2) and between the two side steel plates (3), and the fourth connection assembly comprises a vertical groove (91) and a plurality of groups of horizontal grooves (92) provided on the steel frame (2) and the side steel plates (3); The plurality of groups of transverse grooves (92) are all connected to the vertical grooves (91), and a limiting steel bar (93) is arranged between two corresponding transverse grooves (92), and both ends of the limiting steel bar (93) are arranged in a curved shape.

4. The combination structure of a prefabricated prestressed beam body (1) and a cast-in-place beam according to claim 3, characterized in that: A plurality of positioning holes (10) are provided in each of the plurality of groups of transverse grooves (92), and the bent ends of the plurality of position-limiting steel bars (93) are clamped in the corresponding positioning holes (10).

5. The combination structure of a prefabricated prestressed beam body (1) and a cast-in-place beam according to claim 3, characterized in that: The connecting steel bars (63) are arranged below the limiting steel bars (93), and the two are stacked alternately in sequence.

6. The combination structure of a prefabricated prestressed beam body (1) and a cast-in-place beam according to claim 1, characterized in that: A guide assembly is provided between the side steel plate (3) and the prestressed beam body (1), and the guide assembly comprises a limit block (111) fixedly connected to the side surface of the side steel plate (3); The prestressed beam body (1) is provided with a connection groove (112), and the limit block (111) is slidably connected in the connection groove (112).

7. The combination structure of a prefabricated prestressed beam body (1) and a cast-in-place beam according to claim 6, characterized in that: The limit block (111) is provided with a plurality of recesses and grouting holes (12), and the grouting holes (12) are connected to the recesses.

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