CN113585618A - Precast concrete composite beam and construction method thereof - Google Patents
Precast concrete composite beam and construction method thereof Download PDFInfo
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- CN113585618A CN113585618A CN202111061735.1A CN202111061735A CN113585618A CN 113585618 A CN113585618 A CN 113585618A CN 202111061735 A CN202111061735 A CN 202111061735A CN 113585618 A CN113585618 A CN 113585618A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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- Structural Engineering (AREA)
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Abstract
The invention discloses a precast concrete composite beam and a construction method thereof, the precast concrete composite beam comprises a supporting beam, a fixing mechanism is arranged on the supporting beam, the fixing mechanism comprises a fixing plate, a first butt joint reinforcing steel bar, a second butt joint reinforcing steel bar and fixing parts, the fixing plate is fixedly connected to the top of the supporting beam, the first butt joint reinforcing steel bar and the second butt joint reinforcing steel bar are respectively and fixedly connected to two sides of the fixing plate, two groups of fixing parts are arranged in the fixing plate, a stabilizing mechanism is arranged in the fixing plate, the first butt joint reinforcing steel bar and the second butt joint reinforcing steel bar are in butt joint with a butt joint block, a moving block is extruded by a rotating bolt to push the moving block to fix the first butt joint reinforcing steel bar and the second butt joint reinforcing steel bar, the connection tightness between the two composite beams is increased by the butt joint between the supporting beam and the fixing between the composite beams by a supporting block, the space formed between the two composite beams can be poured, the working efficiency of the working personnel is increased.
Description
Technical Field
The invention belongs to the technical field of building engineering, and particularly relates to a precast concrete composite beam and a construction method thereof.
Background
The composite beam is a beam formed by combining two different materials or combining different processes, is called a composite beam, one main beam of the composite beam is called a composite beam, a bridge deck connecting each main beam is made of another material, and a composite beam formed by a prefabricated reinforced concrete beam or a prestressed concrete beam and a reinforced concrete bridge deck poured on site is also used, compared with the reinforced concrete beam, the concrete composite beam can reduce the self weight of the structure, reduce the earthquake action, reduce the section size, increase the effective use space, save the formwork supporting process and the formwork, shorten the construction period, increase the ductility of the beam and the like, compared with the steel beam, the steel consumption can be reduced, the rigidity is increased, the stability and the integrity are increased, the fire resistance and the durability of the structure are enhanced and the like, in recent years, the concrete composite beam has been more and more widely applied to urban bridges and building structures in China, the concrete composite beam is developing towards a large span direction, and the application practice of the concrete composite beam in China shows that the concrete composite beam has the advantages of a steel structure and a concrete structure, has obvious technical economic benefits and social benefits, is suitable for the national conditions of basic construction of China, and is one of the main development directions of future structural systems.
The connection need be pour to current precast concrete composite beam in actual installation, but need set up the mould in addition at the in-process of pouring, need operations such as drawing of patterns after waiting dry, the installation is comparatively troublesome, leads to the staff to waste time and energy, and current precast concrete composite beam is when the butt joint, and the handing-over department often has the untight condition of connection, can lead to precast concrete composite beam junction to damage very fast, makes the life-span reduction of composite beam.
Disclosure of Invention
The invention aims to: through the butt joint of first butt joint reinforcing bar and second butt joint reinforcing bar and butt joint piece, the rethread rotates bolt extrusion movable block, promote the movable block and fix first butt joint reinforcing bar and second butt joint reinforcing bar, the butt joint between rethread bracing piece and dead lever and the horizontal pole, increase the compactness of connecting between two combination roof beams, through the butt joint between the supporting beam, the support of rethread bracing piece, the supporting shoe is fixed between the combination roof beam in addition, can pour the space that forms between two combination roof beams, avoided the user to build the mould and pour, staff's work efficiency has been increased.
The technical scheme adopted by the invention is as follows: a precast concrete composite beam, comprising: the supporting beam is provided with a fixing mechanism, the fixing mechanism comprises a fixing plate, a first butt joint reinforcing steel bar, a second butt joint reinforcing steel bar and fixing parts, the fixing plate is fixedly connected to the top of the supporting beam, the first butt joint reinforcing steel bar and the second butt joint reinforcing steel bar are respectively and fixedly connected to two sides of the fixing plate, and the two groups of fixing parts are arranged in the fixing plate; the stabilizing mechanism comprises two supporting blocks, a supporting plate, two threaded rods and two supporting parts, one side of each supporting block is fixedly connected with the fixing plate, the two threaded rods are respectively and fixedly connected between the upper inner wall and the lower inner wall of each supporting block, the supporting plate is sleeved between the two threaded rods, and the two supporting parts are respectively arranged in the two supporting blocks; and the installation mechanism comprises a plurality of butt joint blocks and a plurality of moving components, the bottoms of the butt joint blocks are fixedly connected with the supporting beams, and the moving components are arranged in the butt joint blocks.
The fixing parts comprise two fixing grooves, a plurality of transverse rods and a plurality of fixing rods, the fixing grooves are formed in the tops of the fixing plates, the transverse rods are fixedly connected between the inner walls of the two sides of the two fixing grooves respectively, and the fixing rods are fixedly connected between the inner walls of the two sides of the two fixing grooves respectively.
The top of the supporting beam is fixedly connected with a plurality of supporting rods, and the supporting rods are matched with the two fixing grooves respectively.
The two supporting parts comprise fixing springs and hollow nuts, the fixing springs are respectively sleeved on the outer surfaces of the two threaded rods, and the hollow nuts are respectively sleeved on the outer surfaces of the two threaded rods.
The upper inner wall and the lower inner wall of the two supporting blocks are fixedly connected with two stabilizer bars respectively, and the two stabilizer bars penetrate through two ends of the supporting plate.
The plurality of moving parts comprise moving blocks and rotating bolts, the rotating bolts are respectively in threaded connection with the corresponding butt-joint blocks, and the moving blocks are respectively embedded on two sides of the butt-joint blocks in a sliding manner; the moving block is a strip with a semicircular radial section; the moving block comprises a sealed elastic outer sleeve and a non-Newtonian fluid filled in the sealed elastic outer sleeve.
Wherein, the inside department of being close to both sides of a supporting beam all inlays and is equipped with two I-steel.
Two ends of the supporting beam are fixedly connected with two mounting plates respectively, and four threaded holes are formed in the edge of each mounting plate.
Wherein, the bottom threaded connection of supporting beam has a plurality of fixing bolt.
A construction method of a precast concrete composite beam comprises the following steps:
s1, butting the combined beams: the combined beam is placed at a proper position, the other combined beam is butted, the bottoms of the two combined beams are fixed through the fixing bolts, the mounting plate is fixed through the bolts, the first butt-joint reinforcing steel bars are sleeved on the butt-joint blocks, and the supporting rods penetrate through the middle of a grid formed by the cross rods and the fixing rods.
S2, adjusting and supporting: and screwing the hollow nut, lifting the hollow nut, pushing the supporting plate to slide on the threaded rod through the elasticity of the fixed spring until the supporting plate is positioned below the first butt-joint reinforcing steel bar.
S3, fixing the composite beam: the rotating bolt is screwed to move up and down on the butt joint block, the moving block is extruded by the rotating bolt in the moving down process, the moving block is tightly attached to the first butt joint reinforcing steel bar and the second butt joint reinforcing steel bar, and finally, the butt joint position of the two combined beams is poured by cement to connect the two combined beams.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the invention, the first butt-joint reinforcing steel bar and the second butt-joint reinforcing steel bar are in butt joint with the butt-joint block, the movable block is extruded by rotating the bolt, the movable block is pushed to fix the first butt-joint reinforcing steel bar and the second butt-joint reinforcing steel bar, and the connection tightness between the two combined beams is increased by butt joint between the support rod and the fixed rod as well as the cross rod.
2. According to the invention, through butt joint between the support beams, support of the support plates and fixation of the support blocks to the combined beams, a space formed between the two combined beams can be poured, so that a user is prevented from building a mold for pouring, and the working efficiency of workers is increased; the structure can realize efficient and accurate assembly, ensure the stable postures of the combined beam and the supporting beam in the installation process and ensure the safety; and the device is convenient to adjust according to the specific conditions of the site, can adapt to various site environments and the inconvenient installation conditions caused by prefabrication and processing errors, and has strong adaptability.
3. According to the invention, the steel bar structure and post-pouring connection of the composite beam are utilized, and meanwhile, the assembly connection in a buckling mode is realized by utilizing the matching of the fixed groove prefabricated on the composite beam and the supporting beam structure, so that the assembly process is convenient, the assembly speed and precision are improved, the connection strength and stability are very high during assembly, the posture and the anti-seismic stability during the post-pouring concrete solidification process are convenient, and the defect caused by external force during the post-pouring concrete solidification process is avoided.
4. According to the invention, the characteristics of the non-Newtonian fluid are utilized to enable the moving block to have extrusion deformation capacity under the action of a slow external force and have solid-state pressure resistance capacity under the action of a rapid external force, so that the moving block can meet the requirement that the butt joint block, the first butt joint reinforcing steel bar and the second butt joint reinforcing steel bar form an isolation effect in the installation process, the stability in the installation process is increased, enough gaps can be reserved in the design process, and the field installation is convenient; meanwhile, the movable block can adjust the relative position of the combined beams by utilizing the flexible parts of the movable block in the butt joint process of the adjacent combined beams and make up the problem of installation precision caused by errors in the machining process; the composite beam can play a role in buffering from the inside in the later use process, the structure at the joint is rapidly extruded under the condition of severe external vibration, and the resistance of the non-Newtonian fluid with the shear thickening property to impact is rapidly increased, so that the direct severe collision of the two composite beams and the connecting structure part is avoided, and the damages such as cracks, fragmentation and the like are generated; and under the condition of relieving or less vibration, the flexible characteristic of the moving block can absorb the vibration, the fatigue effect of the concrete is reduced, and the stability and the service life of the concrete are prolonged.
Drawings
FIG. 1 is a front perspective view of the present invention;
FIG. 2 is a rear perspective view of the present invention;
FIG. 3 is a bottom perspective view of the present invention;
FIG. 4 is a front cross-sectional view of the present invention;
FIG. 5 is an enlarged view of portion A of the present invention;
figure 6 is a cross-sectional schematic view of a moving mass of the present invention;
FIG. 7 is an exploded view of the present invention;
FIG. 8 is an assembled view of the present invention;
fig. 9 is an assembled top view of the present invention.
The labels in the figure are: 1-supporting beam, 2-fixing mechanism, 201-fixing plate, 202-first butt joint reinforcing steel bar, 203-second butt joint reinforcing steel bar, 204-supporting rod, 205-cross bar, 206-fixing rod, 207-fixing groove, 208-I-shaped steel, 3-stabilizing mechanism, 301-supporting block, 302-hollow nut, 303-supporting plate, 304-fixing spring, 305-threaded rod, 306-stabilizing rod, 4-mounting mechanism, 401-rotating bolt, 402-butt joint block, 403-moving block, 404-sealing elastic jacket, 405-non-Newtonian fluid, 5-mounting plate and 6-fixing bolt.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to FIGS. 1-9: a precast concrete composite beam, comprising: the supporting beam 1 is symmetrically arranged, the supporting beam 1 is arranged for supporting and installing other components, the supporting beam 1 is provided with a fixing mechanism 2, the fixing mechanism 2 is arranged for positioning, the fixing mechanism 2 comprises a fixing plate 201, a first butt joint reinforcing steel bar 202, a second butt joint reinforcing steel bar 203 and a fixing component, the fixing plate 201 is fixedly connected to the top of the supporting beam 1, the fixing plate 201 is arranged for installation and fixation, the first butt joint reinforcing steel bar 202 and the second butt joint reinforcing steel bar 203 are respectively and fixedly connected to two sides of the fixing plate 201, the second butt joint reinforcing steel bar 203 is positioned at the bottom of the first butt joint reinforcing steel bar 202, the first butt joint reinforcing steel bar 202 and the second butt joint reinforcing steel bar 203 are arranged, the joint of the two combined beams can be more stable, and the two groups of fixing components are arranged in the fixing plate 201; the fixing part, the stabilizing mechanism 3 is arranged for adjusting and supporting, the stabilizing mechanism 3 comprises two supporting blocks 301, a supporting plate 303, two threaded rods 305 and two supporting parts, one sides of the two supporting blocks 301 are fixedly connected with the fixing plate 201, the supporting blocks 301 are arranged for installation and supporting, the outer surface of one side of each supporting block 301 is provided with a sliding groove, the supporting plate 303 is embedded with the sliding grooves in a sliding manner, the two threaded rods 305 are respectively and fixedly connected between the upper inner wall and the lower inner wall of the two supporting blocks 301, the threaded rods 305 are arranged for limiting and connecting, the supporting plate 303 is sleeved between the two threaded rods 305, the supporting plate 303 is arranged for supporting the first butt-joint reinforcing steel bar 202, the two supporting parts are respectively arranged in the two supporting blocks 301, and the mounting mechanism 4 is arranged for increasing the connection tightness between the first butt-joint reinforcing steel bar 202 and the second butt-joint reinforcing steel bar 203, the installation mechanism 4 comprises a plurality of butt-joint blocks 402 and a plurality of moving parts, the bottoms of the butt-joint blocks 402 are fixedly connected with the support beam 1, the butt-joint blocks 402 are arranged for limiting the first butt-joint reinforcing steel bar 202 and the second butt-joint reinforcing steel bar 203, the moving parts are arranged in the butt-joint blocks 402, the fixing parts respectively comprise two fixing grooves 207, a plurality of cross rods 205 and a plurality of fixing rods 206, the two fixing grooves 207 are arranged at the tops of the fixing plates 201, the fixing grooves 207 are used for installation, the cross rods 205 are respectively and fixedly connected between the inner walls at two sides of the two fixing grooves 207, the fixing rods 206 are respectively and fixedly connected between the inner walls at the front and rear sides of the two fixing grooves 207, the cross rods 205 and the fixing rods 206 are arranged for increasing the stability of pouring, the two supporting parts comprise fixing springs 304 and hollow nuts 302, and the two fixing springs 304 are respectively sleeved on the outer surfaces of the two threaded rods 305, two hollow nut 302 are respectively overlapped and are located the surface of two threaded rods 305, and the setting of fixed spring 304 is used for supporting plate 303, and hollow nut 302's carving is equipped with the internal thread, and hollow nut 302 matches each other with threaded rod 305, and can adjust the position of supporting plate 303 through hollow nut 302's removal.
Referring to FIGS. 1-9: the top of the support beam 1 is fixedly connected with a plurality of support rods 204, the support rods 204 are arranged for positioning when the combined beam is connected, the support rods 204 are inserted into grids between the cross bars 205 and the fixed rods 206, the connection tightness of the connection position can be increased when cement is poured, the plurality of support rods 204 are respectively matched with the two fixed grooves 207, two stabilizing rods 306 are respectively and fixedly connected between the upper inner wall and the lower inner wall of each support block 301, the stabilizing rods 306 are arranged for limiting the support plate 303, the support plate 303 can slide on the stabilizing rods 306, the two stabilizing rods 306 penetrate through the two ends of the support plate 303, the plurality of moving parts respectively comprise moving blocks 403 and rotating bolts 401, the moving blocks 403 are arranged for extruding the first butt-joint reinforcing steel bars 202 and the second butt-joint reinforcing steel bars 203, and the plurality of rotating bolts 401 are respectively in threaded connection with the corresponding butt-joint blocks 402, the rotating bolt 401 is arranged for extruding the butt-joint block 402 to enable the butt-joint block 402 to move, the plurality of moving blocks 403 are respectively embedded on two sides of the plurality of butt-joint blocks 402 in a sliding mode, the moving blocks 403 are long strips with semicircular radial sections, and sliding blocks are arranged on straight surfaces; the moving mass 403 includes a sealed elastomeric casing 404 and a non-Newtonian fluid 405 filled within the sealed elastomeric casing 404.
It all inlays and is equipped with two I-steel 208 to be close to both sides department in a supporting beam 1's inside, the setting of I-steel 208 is used for increasing a supporting beam 1's structural strength, two mounting panels 5 of two fixedly connected with respectively in a supporting beam 1's both ends, four screw holes have all been seted up in 5 edges of every mounting panel, the setting of mounting panel 5 is used for connecting a supporting beam 1, a supporting beam 1's bottom threaded connection has a plurality of fixing bolt 6, fixing bolt 6 sets up and is used for fixing between two combination beam.
When in use, a user firstly puts the combined beams at a proper position, butt joints the other combined beam, screws the fixing bolt 6 to the bottoms of the combined beams, fixes the bottoms of the two combined beams through the fixing bolt 6, then fixes the butted mounting plates 5 through the bolts, at the moment, the first butted steel bar 202 is sleeved on the butted block 402, the support rod 204 passes through the middle of a grid formed by the cross rod 205 and the fixing rod 206, then screws the hollow nut 302, the hollow nut 302 rises on the threaded rod 305, pushes the support plate 303 to slide on the threaded rod 305 through the elasticity of the fixing spring 304 until the support plate 303 is positioned below the first butted steel bar 202, finally screws the rotating bolt 401, enables the rotating bolt 401 to move up and down on the butted block 402, the rotating bolt 401 extrudes the moving block 403 in the downward moving process, and enables the moving block 403 to be tightly jointed with the first butted steel bar 202 and the second butted steel bar 203, and finally, pouring cement at the butted part of the two combined beams to connect the two combined beams, thus finishing the butt joint installation of the two combined beams.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A precast concrete composite beam, comprising:
the supporting beam (1) is provided with a fixing mechanism (2), the fixing mechanism (2) comprises a fixing plate (201), a first butt joint reinforcing steel bar (202), a second butt joint reinforcing steel bar (203) and fixing parts, the fixing plate (201) is fixedly connected to the top of the supporting beam (1), the first butt joint reinforcing steel bar (202) and the second butt joint reinforcing steel bar (203) are respectively and fixedly connected to two sides of the fixing plate (201), and the two groups of fixing parts are arranged in the fixing plate (201);
the stabilizing mechanism (3) comprises two supporting blocks (301), a supporting plate (303), two threaded rods (305) and two supporting parts, one side of each of the two supporting blocks (301) is fixedly connected with the fixing plate (201), the two threaded rods (305) are respectively and fixedly connected between the upper inner wall and the lower inner wall of each of the two supporting blocks (301), the supporting plate (303) is sleeved between the two threaded rods (305), and the two supporting parts are respectively arranged in the two supporting blocks (301); and
the installation mechanism (4), installation mechanism (4) include a plurality of butt joint pieces (402) and a plurality of removal part, and is a plurality of the bottom and the supporting beam (1) fixed connection of butt joint piece (402), it is a plurality of remove the part and all set up in butt joint piece (402).
2. A precast concrete composite beam as recited in claim 1, wherein: the fixed part all includes two fixed slots (207), a plurality of horizontal pole (205) and a plurality of dead lever (206), two the top of fixed plate (201) is all seted up in fixed slot (207), and is a plurality of horizontal pole (205) are fixed connection respectively between the both sides inner wall of two fixed slots (207), and is a plurality of dead lever (206) is fixed connection respectively between the front and back both sides inner wall of two fixed slots (207).
3. A precast concrete composite beam as recited in claim 2, wherein: the top of the supporting beam (1) is fixedly connected with a plurality of supporting rods (204), and the supporting rods (204) are matched with the two fixing grooves (207) respectively.
4. A precast concrete composite beam as recited in claim 1, wherein: the two supporting parts comprise fixing springs (304) and hollow nuts (302), the fixing springs (304) are respectively sleeved on the outer surfaces of the two threaded rods (305), and the hollow nuts (302) are respectively sleeved on the outer surfaces of the two threaded rods (305).
5. A precast concrete composite beam as recited in claim 1, wherein: two stabilizer bars (306) are fixedly connected between the upper inner wall and the lower inner wall of the two supporting blocks (301), and the two stabilizer bars (306) penetrate through two ends of the supporting plate (303).
6. A precast concrete composite beam as recited in claim 1, wherein: the plurality of moving parts comprise moving blocks (403) and rotating bolts (401), the plurality of rotating bolts (401) are respectively in threaded connection with corresponding connecting blocks (402), and the plurality of moving blocks (403) are respectively embedded on two sides of the plurality of connecting blocks (402) in a sliding manner; the moving block (403) is a strip with a semicircular radial section; the moving block (403) comprises a sealed elastic outer sleeve (404) and a non-Newtonian fluid (405) filled in the sealed elastic outer sleeve (404).
7. A precast concrete composite beam method according to claim 1, wherein: two I-shaped steel beams (208) are embedded in the supporting beam (1) close to the two sides.
8. A precast concrete composite beam as recited in claim 1, wherein: the two ends of the supporting beam (1) are fixedly connected with two mounting plates (5) respectively, and each edge of each mounting plate (5) is provided with four threaded holes.
9. A precast concrete composite beam as recited in claim 1, wherein: the bottom of the supporting beam (1) is in threaded connection with a plurality of fixing bolts (6).
10. A construction method of a precast concrete composite girder using the precast concrete composite girder according to any one of claims 1 to 9, comprising the steps of:
s1, butting the combined beams: firstly, placing the combined beams at a proper position, butting the other combined beam, fixing the bottoms of the two combined beams through a fixing bolt (6), fixing the mounting plate (5) through a bolt, sleeving a first butting reinforcing steel bar (202) on a butting block (402), and enabling a supporting rod (204) to penetrate through the middle of a grid formed by a cross rod (205) and a fixing rod (206);
s2, adjusting and supporting: screwing the hollow nut (302), lifting the hollow nut (302), pushing the support plate (303) to slide on the threaded rod (305) through the elasticity of the fixed spring (304) until the support plate (303) is positioned below the first butt-joint reinforcing steel bar (202);
s3, fixing the composite beam: the rotating bolt (401) is screwed to move up and down on the butt joint block (402), the rotating bolt (401) extrudes the moving block (403) in the downward moving process, the moving block (403) is tightly attached to the first butt joint reinforcing steel bar (202) and the second butt joint reinforcing steel bar (203), and finally, cement is poured at the butt joint position of the two combined beams to connect the two combined beams.
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| CN110528778A (en) * | 2019-09-18 | 2019-12-03 | 苏州科技大学 | A kind of Steel-concrete Combined Beam Structures that Novel tensile is cut and its manufacture craft |
| CN112049241A (en) * | 2020-09-01 | 2020-12-08 | 上海家树建筑工程有限公司 | Connecting structure for precast beam column and construction method thereof |
| CN112502037A (en) * | 2020-12-23 | 2021-03-16 | 河南省交通规划设计研究院股份有限公司 | Wet seam connection structure of prefabricated decking |
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