A prefabricated stiffened beam structure and method

Abstract

This invention relates to the field of building technology and discloses a prefabricated stiffened beam structure and method, including an I-beam, a cast-in-place slab, several pairs of U-shaped anchor bars, a pair of beam-columns, and a pair of positioning blocks. During assembly of the stiffened beam, the pressing blocks slide towards the sidewall of the positioning blocks. During this sliding process, the pressing blocks drive a rocker arm to push a sliding block towards the concrete sidewall. Finally, the insert rod on the sidewall of the sliding block moves synchronously. At this time, the insert rod drives the fixing plate to press against the concrete sidewall, so that the entire stiffened beam is located at the center of the two beam-columns. Furthermore, during the sliding process, the position of the guide slope on the surface of the sliding block changes. The guide slope presses against the top rod, which then slides towards both sides of the sliding block under the pressing force. Finally, the end of the top rod reaches above and below the I-beam, providing vertical support to the entire I-beam, ensuring that the I-beam is centered in the positioning block position. This facilitates installation and eliminates the need for subsequent fine-tuning, improving installation efficiency.

Description

Technical Field

[0001] This invention belongs to the field of building technology, specifically, it relates to a prefabricated stiffened beam structure and method. Background Technology

[0002] In the booming development of prefabricated construction, stiffened beams, as key load-bearing and connecting components in building structural systems, are widely used in various high-rise buildings, industrial plants, and large public buildings. From the perspective of material and structural characteristics, in order to meet the ever-increasing load-bearing requirements of buildings, stiffened beams typically use a large amount of heavy steel to construct the main structure, resulting in a high weight of the beams themselves.

[0003] Therefore, when the stiffening beam is moved to its installation position, its enormous weight and strong inertia make even minor positional deviations extremely difficult to correct. Traditional manual prying and pulling methods are almost ineffective, often requiring the use of multiple small jacks, chain hoists, and other auxiliary tools, consuming a large amount of manpower for coordinated work. This not only delays the construction schedule but also significantly increases the safety risk due to prolonged high-altitude work and the need for multiple trades to work together, seriously affecting the smooth progress of the project, construction quality, and economic benefits.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] To address the technical problem of difficulty in correcting minor deviations during the assembly of stiffening beams, the basic concept of the technical solution adopted in this invention is as follows:

[0006] A prefabricated stiffened beam structure includes an I-beam, a cast-in-place slab, several pairs of U-shaped anchor bars, a pair of beam-columns, and a pair of positioning blocks.

[0007] The outer wall of the I-beam is cast with concrete;

[0008] The cast-in-place slab is connected to the top of the concrete, and the top of the I-beam is flush with the lower surface of the cast-in-place slab.

[0009] Several pairs of U-shaped anchor bars are partially cast inside the concrete, and the other part of the U-shaped anchor bars is cast inside the cast-in-place slab. The U-shaped anchor bars are inserted on the outside of the I-beams. Several pairs of transverse structural steel bars are installed on the sidewalls of the U-shaped anchor bars. Bottom bars are installed at the bottom of the U-shaped anchor bars. Both the transverse structural steel bars and the bottom bars are cast in the concrete.

[0010] The pair of beams and columns are respectively connected to both ends of the I-beam;

[0011] Each positioning block is equipped with an L-shaped plate, which is connected to the side wall of the beam / column. The positioning block is attached to the side wall of the I-beam. A pressing block is movably inserted into the positioning block, which is attached to the side wall of the I-beam. A rocker arm is rotatably installed on the pressing block. A slide is movably installed at the end of the rocker arm, and the slide is horizontally slidable inside the positioning block. A rod is installed on the slide, and a fixing plate is installed at the end of the rod. The fixing plate corresponds to the fastening screw on the concrete side wall. A pair of top rods are vertically inserted into the positioning block. The pair of top rods correspond to the top and bottom of the I-beam, respectively, and the bottom of the top rods is attached to the guide slope on the surface of the slide.

[0012] In a preferred embodiment of the present invention, the top of the U-shaped anchor bar is provided with a bent head, the bent head is cast inside the cast-in-place slab, binding bars are installed between adjacent U-shaped anchor bars, the spacing between adjacent U-shaped anchor bars is the same, and the I-beam is made of Q355B steel.

[0013] In a preferred embodiment of the present invention, a pair of connecting plates are installed on the side wall of each beam and column. The pair of connecting plates are L-shaped, and the inner walls of the pair of connecting plates are respectively in contact with the upper surface and the lower surface of the I-beam. Locking bolts are used to connect the connecting plates and the I-beam.

[0014] In a preferred embodiment of the present invention, a plurality of reinforcing ribs are vertically installed at the corner of the L-shaped plate. The reinforcing ribs are triangular. Fastening bolts are installed on the surface of the L-shaped plate, and the fastening bolts penetrate the mounting holes opened in the side wall of the I-beam. A suitable fastening nut is screwed onto the fastening bolt.

[0015] In a preferred embodiment of the present invention, the positioning block has an installation cavity inside, the slide is slidably disposed in the installation cavity, one end of the extrusion block is placed in the installation cavity, the rocker arm is in an inclined state, the connection point between the rocker arm and the slide is closer to the insertion rod side than the connection point between the rocker arm and the extrusion block, a limit rod is movably disposed inside the slide, and the end of the limit rod is connected to the side wall of the installation cavity.

[0016] In a preferred embodiment of the present invention, the insertion rod movably penetrates the side wall of the positioning block, a pressure plate is installed at the connection between the insertion rod and the slide, and a compression spring is sleeved on the insertion rod. One end of the compression spring is engaged with the side wall of the pressure plate, and the other end of the compression spring is engaged with the side wall of the positioning block.

[0017] In a preferred embodiment of the present invention, the surface of the fixing plate is provided with a strip groove, the strip groove is horizontal, the width of the strip groove is adapted to the diameter of the fastening screw, and the fastening screw is integrally cast in concrete.

[0018] In a preferred embodiment of the present invention, a reset plate is installed on the surface of the push rod, and a reset spring is sleeved on the push rod. One end of the reset spring is engaged with the reset plate, and the other end of the reset spring is engaged with the inner side wall of the positioning block. The reset spring is always in a compressed state.

[0019] In a preferred embodiment of the present invention, a top plate is installed on the top of the top rod, the top plate is made of rubber, a guide wheel is rotatably installed on the bottom of the top rod, the guide wheel is in rolling connection with the guide inclined surface, and both ends of the guide inclined surface are connected to a plane, the height of the end of the guide inclined surface near the insertion rod is lower than the height of the other end.

[0020] As a preferred embodiment of the present invention, the construction method of the prefabricated stiffened beam structure includes the following steps:

[0021] Step 1: Prepare the cast-in-place slab, and integrally cast the top of the U-shaped anchor bar inside the cast-in-place slab;

[0022] Step 2: Insert the I-beam into the U-shaped anchor bar, ensuring that the top of the I-beam fits against the bottom of the cast-in-place slab. Install a suitable template on the outside of the U-shaped anchor bar, pour concrete into the template, and remove the template after it has solidified. At this point, the cast-in-place slab, I-beam, and concrete form a whole.

[0023] Step 3: The prepared assembly is hoisted by a crane. The side walls of the I-beam are aligned with the side walls of the beams and columns. During the assembly process, the distance between the I-beam and the L-shaped plate gradually decreases. At this time, the extrusion block is squeezed by the I-beam and then slides towards the side wall of the positioning block.

[0024] Step 4: During the sliding of the extrusion block, the extrusion block drives the rocker arm to move, and the rocker arm pushes the slide block to slide towards the concrete side wall. Finally, the insertion rod on the side wall of the slide block moves synchronously. At this time, the insertion rod drives the fixing plate to slide onto the fastening screw on the concrete side wall. Finally, the fixing plate is inserted into the fastening screw. Later, the locking operation is carried out by the nut to ensure that the I-beam cannot slide laterally.

[0025] Step 5: During the sliding process of the slide block, the position of the guide slope on the slide block surface changes. The guide slope will squeeze the push rod. At this time, the push rod slides to both sides of the slide block under the action of the squeezing force. Finally, the end of the push rod pushes against the top and bottom of the I-beam, providing vertical support for the entire I-beam.

[0026] Step Six: Finally, the L-shaped plate and the I-beam are fixed and supported by the fastening bolts. A pair of connecting plates are installed above the beam and column, and the pair of connecting plates are fixed to the surface of the I-beam by locking bolts to achieve a stable assembly connection. Finally, rock wool is filled at the connection between the positioning block and the I-beam, and fireproof and heat-insulating coating is applied to the outside of the rock wool.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] The I-beams and cast-in-place slabs of the present invention are formed by U-shaped anchor bars and concrete casting. The U-shaped anchor bars are equipped with transverse structural steel bars and bottom bars. The transverse structural steel bars and bottom bars increase the strength of the connection position, thereby improving the overall load-bearing capacity of the stiffened beam.

[0029] In this invention, during the assembly of the stiffening beam, the compression block is pressed by the I-beam, causing it to slide towards the side wall of the positioning block. During this sliding process, the compression block drives the rocker arm to move, which in turn pushes the slide block towards the concrete side wall. Finally, the insert rod on the side wall of the slide block moves synchronously. At this point, the insert rod drives the fixing plate to slide onto the fastening screw on the concrete side wall. Ultimately, the fixing plate presses against the concrete side wall, positioning the entire stiffening beam at the center of the two beams. Furthermore, during the sliding process, the position of the guide slope on the slide block surface changes, causing the guide slope to press against the top rod. Under the pressure, the top rod slides to both sides of the slide block, eventually reaching the top and bottom of the I-beam, providing vertical support and positioning the I-beam at the center of the positioning block. Through the compression of the fixing plate and the top rod, the I-beam automatically slides to the center position, facilitating installation and eliminating the need for subsequent fine-tuning, thus improving installation efficiency.

[0030] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0031] In the attached diagram:

[0032] Figure 1 A three-dimensional structural diagram of a prefabricated stiffened beam construction;

[0033] Figure 2 This is a center sectional view of an I-beam in a prefabricated stiffened beam structure.

[0034] Figure 3 A schematic diagram of the concrete pouring on the outer side of an I-beam in a prefabricated stiffening beam structure.

[0035] Figure 4 This is a prefabricated stiffened beam structure. Figure 1 Enlarged view of point A in the middle;

[0036] Figure 5 This is a partial structural schematic diagram of a prefabricated stiffened beam construction.

[0037] Figure 6 This is a prefabricated stiffened beam structure. Figure 5 Assembly drawing;

[0038] Figure 7 Partial cross-section of a positioning block for a prefabricated stiffened beam structure. Figure 1 ;

[0039] Figure 8 Partial cross-section of a positioning block for a prefabricated stiffened beam structure. Figure 2 .

[0040] In the picture:

[0041] 1. I-beam; 11. Concrete; 2. Cast-in-place slab; 3. U-shaped anchor bar; 31. Transverse structural reinforcement; 32. Bottom reinforcement; 33. Bending head; 34. Tie bar; 4. Beam and column; 41. Connecting plate; 411. Locking bolt; 5. Positioning block; 51. L-shaped plate; 511. Fastening bolt; 512. Reinforcing bar; 513. Installation cavity; 514. Installation hole; 52. Extrusion block; 521. Rocker arm; 522. Slide seat; 523. Limiting rod; 53. Insert rod; 531. Pressure plate; 532. Compression spring; 533. Fixing plate; 534. Strip groove; 535. Fastening screw; 54. Top rod; 541. Top plate; 542. Reset plate; 543. Reset spring; 544. Guide wheel; 545. Guide slope; 546. Plane. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0043] Example 1:

[0044] like Figures 1 to 8 As shown, a prefabricated stiffened beam structure includes an I-beam 1, a cast-in-place slab 2, several pairs of U-shaped anchor bars 3, a pair of beam-columns 4, and a pair of positioning blocks 5.

[0045] The outer wall of the I-beam 1 is filled with concrete 11; the top of the cast-in-place slab 2 is connected to the top of the concrete 11, and the top of the I-beam 1 is flush with the lower surface of the cast-in-place slab 2.

[0046] Several pairs of U-shaped anchor bars 3 are partially cast inside the concrete 11, and another part of the U-shaped anchor bars 3 is cast inside the cast-in-place slab 2. The U-shaped anchor bars 3 are inserted on the outside of the I-beam 1. Several pairs of transverse structural steel bars 31 are installed on the side wall of the U-shaped anchor bars 3. Bottom bars 32 are installed at the bottom of the U-shaped anchor bars 3. Both the transverse structural steel bars 31 and the bottom bars 32 are cast in the concrete 11.

[0047] The I-beam 1 and the cast-in-place slab 2 are formed by casting U-shaped anchor bars 3 and concrete 11. The U-shaped anchor bars 3 are equipped with transverse structural steel bars 31 and bottom bars 32. The transverse structural steel bars 31 and bottom bars 32 increase the strength of the connection position, which ultimately improves the overall load-bearing capacity of the stiffened beam.

[0048] A pair of beams and columns 4 are respectively connected to both ends of the I-beam 1;

[0049] Each positioning block 5 is equipped with an L-shaped plate 51, which is connected to the side wall of the beam column 4. The positioning block 5 is attached to the side wall of the I-beam 1. A pressing block 52 is movably inserted into the positioning block 5. The pressing block 52 is attached to the side wall of the I-beam 1. A rocker arm 521 is rotatably installed on the pressing block 52. A slide seat 522 is movably installed at the end of the rocker arm 521. The slide seat 522 is horizontally slidably installed inside the positioning block 5. An insert rod 53 is installed on the slide seat 522. A fixing plate 533 is installed at the end of the insert rod 53. The fixing plate 533 corresponds to the fastening screw 535 set on the side wall of the concrete 11. A pair of top rods 54 are vertically inserted into the positioning block 5. The pair of top rods 54 correspond to the top and bottom of the I-beam 1 respectively. The bottom of the top rod 54 is attached to the guide slope 545 set on the surface of the slide seat 522. During the assembly of the stiffening beam, the I-beam 1 slides towards the positioning block 5, and the pressing block 52 is pressed by the I-beam 1 and slides towards the side wall of the positioning block 5. During the sliding process of the pressing block 52, the pressing block 52 drives the rocker arm 521 to move, and the rocker arm 521 pushes the slide block 522 to slide towards the side wall of the concrete 11. Finally, the insert rod 53 on the side wall of the slide block 522 moves synchronously. At this time, the insert rod 53 drives the fixing plate 533 to slide towards the fastening screw 535 on the side wall of the concrete. Finally, the fixing plate 533 presses against the side wall of the concrete 11, so that the entire stiffening beam is located at the center of the two beams and columns and rotates on the fastening screw 535. The nut is installed to achieve the positioning effect. During the sliding of the slide block 522, the position of the guide slope 545 on the surface of the slide block 522 changes. The guide slope 545 will squeeze the top rod 54. At this time, the top rod 54 slides to both sides of the slide block 522 under the action of the squeezing force. Finally, the end of the top rod 54 pushes against the top and bottom of the I-beam 1, providing vertical support for the entire I-beam 1, so that the I-beam 1 is in the center position of the positioning block 5. Through the squeezing of the fixing plate 533 and the top rod 54, the I-beam 1 automatically slides to the center position, which is convenient for installation and does not require subsequent fine-tuning, thus improving installation efficiency.

[0050] like Figures 1 to 8As shown in the specific embodiment, the top of the U-shaped anchor bar 3 is provided with a bend head 33, which is cast inside the cast-in-place slab 2. The bend head 33 can increase the contact area between the U-shaped anchor bar 3 and the cast-in-place slab 2, thereby improving the connection effect. Tie bars 34 are installed between adjacent U-shaped anchor bars 3, and the spacing between adjacent U-shaped anchor bars 3 is the same. The ties 34 ensure that the distance between the U-shaped anchor bars 3 is the same, and the U-shaped anchor bars 3 will not shift during the casting process. The I-beam 1 is made of Q355B steel, which can improve the structural strength.

[0051] like Figures 1 to 8 As shown, furthermore, a pair of connecting plates 41 are installed on the side wall of each beam and column 4. The pair of connecting plates 41 are L-shaped. The inner walls of the pair of connecting plates 41 are respectively attached to the upper surface and the lower surface of the I-beam 1. Locking bolts 411 are connected between the connecting plates 41 and the I-beam 1. The vertical movement of the I-beam 1 is positioned by the connecting plates 41, which achieves the purpose of limiting and fixing.

[0052] Example 2:

[0053] The difference between Embodiment 1 and this embodiment is that: Figures 1 to 8 As shown, several pairs of reinforcing ribs 512 are vertically installed at the corner of the L-shaped plate 51. The reinforcing ribs 512 are triangular, which can increase the structural strength of the L-shaped plate 51. Fastening bolts 511 are installed on the surface of the L-shaped plate 51, and the fastening bolts 511 penetrate the mounting holes 514 opened on the side wall of the I-beam 1. A suitable fastening nut is screwed on the fastening bolts 511, which facilitates the connection between the L-shaped plate 51 and the I-beam 1.

[0054] like Figures 1 to 8 As shown, in a specific embodiment, the positioning block 5 has an installation cavity 513 inside, the slide block 522 is slidably disposed in the installation cavity 513, one end of the extrusion block 52 is placed in the installation cavity 513, the rocker arm 521 is in an inclined state, and the connection point between the rocker arm 521 and the slide block 522 is closer to the insertion rod 53 than the connection point between the rocker arm 521 and the extrusion block 52. A limit rod 523 is movably disposed inside the slide block 522, and the end of the limit rod 523 is connected to the side wall of the installation cavity 513. During the sliding process of the extrusion block 52, the extrusion block 52 drives the rocker arm 521 to move, and the rocker arm 521 pushes the slide block 522 to move towards the concrete 11 side. At this time, the slide block 522 moves along the limit rod 523, and the limit rod 523 serves as a guide and limiter.

[0055] like Figures 1 to 8As shown, furthermore, the insertion rod 53 movably penetrates the side wall of the positioning block 5. A pressure plate 531 is installed at the connection between the insertion rod 53 and the slide block 522. A compression spring 532 is sleeved on the insertion rod 53. One end of the compression spring 532 is engaged with the side wall of the pressure plate 531, and the other end is engaged with the side wall of the positioning block 5. After the slide block 522 slides, it can press the insertion rod 53 on the side wall to move synchronously. The pressure plate 531 on the insertion rod 53 slides in the mounting cavity 513, and the compression spring 532 on the insertion rod 53 is compressed synchronously. The compression spring 532 facilitates subsequent reset operations.

[0056] Example 3:

[0057] The difference between Embodiment 2 and this embodiment is that: Figures 1 to 8 As shown, a strip groove 534 is provided on the surface of the fixing plate 533. The strip groove 534 is horizontal and the width of the strip groove 534 is adapted to the diameter of the fastening screw 535. The fastening screw 535 is integrally cast in the concrete 11.

[0058] like Figures 1 to 8 As shown, in a specific embodiment, a reset plate 542 is installed on the surface of the push rod 54, and a reset spring 543 is sleeved on the push rod 54. One end of the reset spring 543 is engaged with the reset plate 542, and the other end of the reset spring 543 is engaged with the inner side wall of the positioning block 5. The reset spring 543 is always in a compressed state. A top plate 541 is installed on the top of the push rod 54. The top plate 541 is made of rubber. A guide wheel 544 is rotatably installed on the bottom of the push rod 54. The guide wheel 544 is in rolling connection with the guide inclined surface 545, and both ends of the guide inclined surface 545 are connected to a plane 546. The height of the end of the guide inclined surface 545 near the insertion rod 53 is lower than the height of the other end. During the sliding process of the slide block 522, the position of the guide slope 545 on the surface of the slide block 522 changes. At this time, the guide wheel 544 at the bottom of the push rod 54 slides on the surface of the guide slope 545. Under the action of the extrusion force, the push rod 54 slides to both sides of the slide block 522. Finally, the push rod 54 drives the top plate 541 at the end to push above and below the I-beam 1, providing vertical support for the entire I-beam 1. When the push rod 54 moves, the reset plate 542 on the push rod 54 moves synchronously. The reset plate 542 compresses the reset spring 543, which facilitates the subsequent reset operation.

[0059] This invention also discloses a construction method for a prefabricated stiffened beam structure, the steps of which are as follows:

[0060] Step 1: Prepare the cast-in-place slab 2, and integrally cast the top of the U-shaped anchor bar 3 into the interior of the cast-in-place slab 2;

[0061] Step 2: Insert the I-beam 1 into the U-shaped anchor bar 3, ensuring that the top of the I-beam 1 is in contact with the bottom of the cast-in-place slab 2. A suitable template is installed on the outside of the U-shaped anchor bar 3. Pour concrete 11 into the template and wait for it to solidify before removing the template. At this point, the cast-in-place slab 2, the I-beam 1, and the concrete 11 form a whole.

[0062] Step 3: The prepared assembly is hoisted by a crane. The side walls of the I-beam 1 are aligned with the side walls of the beam and column 4, and the distance between the I-beam 1 and the L-shaped plate 51 is continuously reduced during the assembly process. At this time, the extrusion block 52 is extruded by the I-beam 1, and then the extrusion block 52 slides towards the side wall of the positioning block 5.

[0063] Step 4: During the sliding process of the extrusion block 52, the extrusion block 52 drives the rocker arm 521 to move, and the rocker arm 521 pushes the slide block 522 to slide towards the side wall of the concrete 11. Finally, the insertion rod 53 on the side wall of the slide block 522 moves synchronously. At this time, the insertion rod 53 drives the fixing plate 533 to slide towards the fastening screw 535 on the side wall of the concrete 11. Finally, the fixing plate 533 is inserted into the fastening screw 535. Later, the locking operation is carried out by the nut to ensure that the I-beam 1 cannot slide laterally.

[0064] Step 5: During the sliding process of slide block 522, the position of guide slope 545 on the surface of slide block 522 changes. Guide slope 545 will squeeze push rod 54. At this time, push rod 54 slides to both sides of slide block 522 under the action of squeezing force. Finally, the end of push rod 54 pushes to the top and bottom of I-beam 1, providing vertical support for the entire I-beam 1.

[0065] Step Six: Finally, the L-shaped plate 51 and the I-beam 1 are fixed and supported by the fastening bolts 511. A pair of connecting plates 41 are installed on the top of the beam and column 4, and the pair of connecting plates 41 are fixed to the surface of the I-beam 1 by the locking bolts 411, so as to achieve the purpose of stable assembly connection. Finally, rock wool is filled at the connection between the positioning block 5 and the I-beam 1, and fireproof and heat-insulating coating is applied to the outside of the rock wool.

[0066] The implementation principle of the prefabricated stiffened beam structure and method of the present invention is as follows:

[0067] The operator first prepares the cast-in-place slab 2, then integrally casts the top of the U-shaped anchor bar 3 inside the slab 2. Next, the operator inserts the I-beam 1 into the U-shaped anchor bar 3, ensuring the top of the I-beam 1 fits snugly against the bottom of the cast-in-place slab 2. A suitable template is installed on the outside of the U-shaped anchor bar 3, and concrete 11 is poured into the template. After solidification, the template is removed. At this point, the cast-in-place slab 2, the I-beam 1, and the concrete 11 form a unified whole. The strength at the connection points is increased by the transverse structural reinforcement 31 and the bottom reinforcement 32, ultimately improving the overall load-bearing capacity of the stiffened beam.

[0068] Then the operator hoists the prepared assembly using a crane, and slides the I-beam 1 toward one side of the two beams and columns 4, so that the side wall of the I-beam 1 and the positioning block 5 on the beam and column 4 fit together. When the I-beam 1 slides toward the positioning block 5, the I-beam will first squeeze the pressing block 52 on the side wall of the positioning block 5, so that the pressing block 52 slides into the installation cavity 513 opened inside the positioning block 5.

[0069] Meanwhile, as the extrusion block 52 slides, it drives the rocker arm 521 to move, and the rocker arm 521 pushes the slide block 522 to move towards the concrete 11. At this time, the slide block 522 moves along the limiting rod 523, which serves as a guide and limit. Finally, the slide block 522 can press the insert rod 53 on the side wall to move synchronously. The pressure plate 531 on the insert rod 53 slides in the installation cavity 513, and the compression spring 532 on the insert rod 53 is compressed synchronously. The compression spring 532 facilitates the subsequent reset operation.

[0070] After the insertion rod 53 moves, the insertion rod 53 drives the fixing plate 533 to the side wall of the concrete 11, which eventually allows the fastening screw 535 to slide on the strip groove 534 of the fixing plate 533. Finally, the fixing plate 533 squeezes the concrete 11 to the side wall, so that the entire stiffening beam is located at the center of the two beams and columns 4, and a nut is rotatably installed on the fastening screw 535 to complete the positioning effect and ensure that the I-beam 1 cannot slide laterally.

[0071] During the sliding of the slide block 522, the position of the guide slope 545 on the surface of the slide block 522 changes. At this time, the guide wheel 544 at the bottom of the push rod 54 slides on the surface of the guide slope 545. Under the action of the extrusion force, the push rod 54 slides to both sides of the slide block 522. Finally, the push rod 54 drives the top plate 541 at the end to push above and below the I-beam 1, providing vertical support for the entire I-beam 1. When the push rod 54 moves, the reset plate 542 on the push rod 54 moves synchronously. The reset plate 542 compresses the reset spring 543, which facilitates the reset operation later.

[0072] Finally, the L-shaped plate 51 and the I-beam 1 are fixed and supported by fastening bolts 511. A pair of connecting plates 41 are installed on the top of the beam and column 4, and the pair of connecting plates 41 are fixed to the surface of the I-beam 1 by locking bolts 411, so as to achieve a stable assembly connection. Finally, rock wool is filled at the connection between the positioning block 5 and the I-beam 1, and fireproof and heat-insulating coating is applied to the outside of the rock wool.

Claims

1. A prefabricated stiffened beam structure, characterized in that, include: I-beam (1), the outer wall of which is filled with concrete (11); A pair of beams and columns (4), the pair of beams and columns (4) are respectively connected to both ends of the I-beam (1); A pair of positioning blocks (5), each of which is equipped with an L-shaped plate (51). The L-shaped plate (51) is connected to the side wall of the beam and column (4), and the positioning block (5) is attached to the side wall of the I-beam (1). A pressing block (52) is movably inserted on the positioning block (5). The pressing block (52) is attached to the side wall of the I-beam (1). A rocker arm (521) is rotatably mounted on the pressing block (52). A slide (522) is movably provided at the end of the rocker arm (521), and the slide (522) is horizontally slidable. Inside the positioning block (5), a rod (53) is installed on the slide (522), and a fixing plate (533) is installed at the end of the rod (53). The fixing plate (533) corresponds to the fastening screw (535) provided on the side wall of the concrete (11). A pair of top rods (54) are vertically inserted on the positioning block (5). The pair of top rods (54) correspond to the top and bottom of the I-beam (1) respectively, and the bottom of the top rod (54) is in contact with the guide slope (545) provided on the surface of the slide (522). A cast-in-place slab (2) is connected to the top of the concrete (11), and the top of the I-beam (1) is flush with the lower surface of the cast-in-place slab (2); several pairs of U-shaped anchor bars (3), a portion of the several pairs of U-shaped anchor bars (3) is cast inside the concrete (11), and the other portion of the U-shaped anchor bars (3) is cast inside the cast-in-place slab (2), and the U-shaped anchor bars (3) are inserted on the outside of the I-beam (1), and several pairs of transverse structural steel bars (3) are installed on the side wall of the U-shaped anchor bars (3). 1) The bottom of the U-shaped anchor bar (3) is equipped with a bottom bar (32), and the transverse structural bar (31) and the bottom bar (32) are both poured into the concrete (11); the top of the U-shaped anchor bar (3) is provided with a bent head (33), the bent head (33) is poured into the cast-in-place slab (2), and binding bars (34) are installed between adjacent U-shaped anchor bars (3), the spacing between adjacent U-shaped anchor bars (3) is the same, and the I-beam (1) is made of Q355B steel; The positioning block (5) has an installation cavity (513) inside. The slide (522) is slidably disposed in the installation cavity (513). One end of the extrusion block (52) is placed in the installation cavity (513). The rocker arm (521) is in an inclined state. The connection point between the rocker arm (521) and the slide (522) is closer to the insertion rod (53) than the connection point between the rocker arm (521) and the extrusion block (52). A limit rod (523) is movably disposed inside the slide (522). The end of the limit rod (523) is connected to the side wall of the installation cavity (513). The top of the top rod (54) is equipped with a top plate (541), which is made of rubber. The bottom of the top rod (54) is rotatably equipped with a guide wheel (544). The guide wheel (544) is rolledly connected to the guide slope (545), and both ends of the guide slope (545) are connected to a plane (546). The height of the end of the guide slope (545) near the insertion rod (53) is lower than the height of the other end.

2. The prefabricated stiffening beam structure according to claim 1, characterized in that, Each of the beams and columns (4) has a pair of connecting plates (41) installed on its side wall. The pair of connecting plates (41) are L-shaped. The inner walls of the pair of connecting plates (41) are respectively attached to the upper surface of the I-beam (1) and the lower surface of the I-beam (1). Locking bolts (411) are connected between the connecting plates (41) and the I-beam (1).

3. The prefabricated stiffened beam structure according to claim 1, characterized in that, Several pairs of reinforcing ribs (512) are vertically installed at the corner of the L-shaped plate (51). The reinforcing ribs (512) are triangular. Fastening bolts (511) are installed on the surface of the L-shaped plate (51), and the fastening bolts (511) penetrate the mounting holes (514) opened on the side wall of the I-beam (1). A suitable fastening nut is screwed onto the fastening bolts (511).

4. The prefabricated stiffening beam structure according to claim 1, characterized in that, The insertion rod (53) moves through the side wall of the positioning block (5). A pressure plate (531) is installed at the connection between the insertion rod (53) and the slide (522). A compression spring (532) is sleeved on the insertion rod (53). One end of the compression spring (532) is clamped to the side wall of the pressure plate (531), and the other end of the compression spring (532) is clamped to the side wall of the positioning block (5).

5. The prefabricated stiffening beam structure according to claim 1, characterized in that, The surface of the fixing plate (533) is provided with a strip groove (534), the strip groove (534) is horizontal, the width of the strip groove (534) is adapted to the diameter of the fastening screw (535), and the fastening screw (535) is integrally cast in concrete (11).

6. The prefabricated stiffening beam structure according to claim 1, characterized in that, A reset plate (542) is installed on the surface of the top rod (54), and a reset spring (543) is sleeved on the top rod (54). One end of the reset spring (543) is engaged with the reset plate (542), and the other end of the reset spring (543) is engaged with the inner wall of the positioning block (5). The reset spring (543) is always in a compressed state.

7. A construction method for a prefabricated stiffened beam structure, characterized in that, The method for constructing a prefabricated stiffened beam structure according to any one of claims 1 to 6 comprises the following steps: Step 1: Prepare the cast-in-place slab (2) and cast the top of the U-shaped anchor bar (3) into the interior of the cast-in-place slab (2); Step 2: Insert the I-beam (1) into the U-shaped anchor bar (3) to ensure that the top of the I-beam (1) is in contact with the bottom of the cast-in-place slab (2). A suitable template is installed on the outside of the U-shaped anchor bar (3). Pour concrete (11) into the template and wait for it to solidify before removing the template. At this time, the cast-in-place slab (2), the I-beam (1) and the concrete (11) form a whole. Step 3: The prepared assembly is hoisted by a crane. The side walls of the I-beam (1) are aligned with the side walls of the beam and column (4) and L-shaped plates (51) are installed. During the assembly process, the distance between the I-beam (1) and the L-shaped plates (51) gradually decreases. At this time, the extrusion block (52) is extruded by the I-beam (1) and then the extrusion block (52) slides towards the side wall of the positioning block (5). Step 4: During the sliding process of the extrusion block (52), the extrusion block (52) drives the rocker arm (521) to move, and the rocker arm (521) pushes the slide block (522) to slide towards the side wall of the concrete (11). Finally, the insertion rod (53) on the side wall of the slide block (522) moves synchronously. At this time, the insertion rod (53) drives the fixing plate (533) to slide towards the fastening screw (535) on the side wall of the concrete (11). Finally, the fixing plate (533) is inserted into the fastening screw (535). Later, the locking operation is carried out by the nut to ensure that the I-beam (1) cannot slide laterally. Step 5: During the sliding process of the slide (522), the position of the guide slope (545) on the surface of the slide (522) changes. The guide slope (545) will squeeze the top rod (54). At this time, the top rod (54) slides to both sides of the slide (522) under the action of the squeezing force. Finally, the end of the top rod (54) pushes against the top and bottom of the I-beam (1) to provide vertical support for the entire I-beam (1). Step 6: Finally, the L-shaped plate (51) and the I-beam (1) are fixed and supported by the fastening bolts (511). A pair of connecting plates (41) are installed above the beam and column (4), and the pair of connecting plates (41) are fixed to the surface of the I-beam (1) by the locking bolts (411), so as to achieve the purpose of stable assembly connection. Finally, rock wool is filled at the connection between the positioning block (5) and the I-beam (1), and fireproof and heat-insulating coating is applied to the outside of the rock wool.

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