CN115198902A - Concrete expansion joint structure and construction method thereof - Google Patents
Concrete expansion joint structure and construction method thereof Download PDFInfo
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- CN115198902A CN115198902A CN202210853851.5A CN202210853851A CN115198902A CN 115198902 A CN115198902 A CN 115198902A CN 202210853851 A CN202210853851 A CN 202210853851A CN 115198902 A CN115198902 A CN 115198902A
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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
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
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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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Abstract
The utility model relates to a concrete expansion joint structure, set up in the cast-in-place panel of cast-in-place girder up end including a plurality of along horizontal setting and along longitudinal distribution's cast-in-place girder and a plurality of, two cast-in-place girders are fixed in respectively to the both sides of cast-in-place panel, have the expansion joint between two adjacent cast-in-place panels, the expansion joint is located the top of cast-in-place girder, and the length direction at expansion joint is on a parallel with the length direction of cast-in-place girder, place the joint spare at the expansion joint in being provided with between cast-in-place panel and the cast-in-place girder in, joint spare includes a pair of prefabricated reinforcing limiting plate between cast-in-place panel and the cast-in-place girder and installs the joint board between two prefabricated reinforcing limiting plates. This application has the effect that effectively shortens floor structure's construction cycle.
Description
Technical Field
The application relates to the technical field of building structure construction, in particular to a concrete expansion joint structure and a construction method thereof.
Background
Expansion joint: the structural joint is a structural joint arranged along a proper position in the direction of a construction joint of a building or a structure in order to prevent the structure from generating cracks or damages due to climate temperature changes (thermal expansion and cold contraction). The expansion joint divides building components above a foundation such as a wall, a floor and a roof (except a wooden roof) into two independent parts, so that the building or the structure can horizontally expand and contract along the length direction.
At present, a beam structure is usually poured firstly in floor construction, the floor structure is poured after the beam structure reaches preset strength, expansion joints are reserved in the floor pouring process, the expansion joints are subjected to joint filling treatment after the floor structure reaches the preset strength, the beam structure and the floor structure adopt a segmented pouring mode, the bearing capacity and the anti-expansion stress performance of the floor structure are poor, the size of the floor needs to be further controlled, the number of the expansion joints needing to be arranged in the whole roof floor construction process is increased, the construction period is long, and further improvement is needed.
Disclosure of Invention
In order to effectively shorten floor structure's construction cycle, this application provides a concrete expansion joint structure.
The application provides a concrete expansion joint structure adopts following technical scheme:
the utility model provides a concrete expansion joint structure, includes that a plurality of sets up in the cast-in-place panel of cast-in-place girder up end along horizontal setting and along longitudinal distribution's cast-in-place girder and a plurality of, two cast-in-place girders are fixed in respectively to the both sides of cast-in-place panel, have the expansion joint between two adjacent cast-in-place panels, the expansion joint is located the top of cast-in-place girder, and the length direction at expansion joint is on a parallel with the length direction of cast-in-place girder, place the joint piece at the expansion joint in being provided with between cast-in-place panel and the cast-in-place girder in, the joint piece includes a pair of prefabricated reinforcing limiting plate between cast-in-place panel and the cast-in-place girder and installs the joint board between two prefabricated reinforcing limiting plates.
Through adopting above-mentioned technical scheme, strengthen the limiting plate through setting up the prefabrication, the prefabrication is strengthened the limiting plate part and is pre-buried between cast-in-place girder and cast-in-place panel, improves cast-in-place girder and cast-in-place panel's connection structure stability to effectively improve cast-in-place panel's bearing capacity and anti flexible stress performance, and then in the panel work progress, can be corresponding increase the size of pouring of panel, thereby the maximum interval at increase expansion joint, thereby effectively reduce the quantity at expansion joint, thereby effectively reduce the construction degree of difficulty and shorten construction cycle.
Preferably, the upper end face of the prefabricated reinforcing limiting plate is flush with the upper end face of the cast-in-place panel, the upper end face of the joint plate is lower than the upper end face of the prefabricated reinforcing limiting plate, a filler groove is formed between the upper end face of the joint plate and the inner side face of the prefabricated reinforcing limiting plate, and filler materials are filled in the filler groove.
Through adopting above-mentioned technical scheme, the packing groove is filled with the joint compound, on the one hand, the joint compound is flexible, the expend with heat and contract with cold that can the adaptation floor is corresponding carries out the elastic change, on the one hand, the joint compound has better sealing effect, improve the leakproofness between prefabricated enhancement limiting plate and the joint plate, and under sleet weather condition, water can be blockked at the floor external surface by the joint compound, reduce the possibility that the floor takes place the infiltration, on the other hand, prevent in the impurity embedding expansion joint, thereby make the expansion joint lose the breathing performance, make the floor produce to encircle bloated and fracture, especially can lead to seam department board end pressure to concentrate when the joint is expanded in the embedding of small-bore stone, crowd bad consequences such as garrulous near the seam concrete plate.
Preferably, cast-in-place girder is pre-buried to have girder steel reinforcement frame body, girder steel reinforcement frame body includes that a plurality of is fixed in the girder stirrup of girder stirrup along the length direction interval distribution of cast-in-place girder and a plurality of, the girder stirrup is placed in the circumference distribution of a plurality of girder stirrup in and, the axial direction of girder inner angle reinforcing bar is on a parallel with the length direction of cast-in-place girder, the pre-buried panel steel reinforcement frame body that has of cast-in-place panel, panel steel reinforcement frame body includes panel transverse reinforcement and the panel longitudinal reinforcement of fixed connection in panel transverse reinforcement, the one end bending type of panel longitudinal reinforcement forms the kink, the kink of panel longitudinal reinforcement extends to in the girder steel reinforcement frame body, the seam piece is fixed in the girder steel reinforcement frame body and is located between the kink of two panel longitudinal reinforcements.
By adopting the technical scheme, before the cast-in-place panel and the cast-in-place girder are poured, the girder steel bar frame body and the girder steel bar frame body are erected, the bending part of the longitudinal steel bar of the panel extends into the girder steel bar frame body, the girder steel bar frame body provides a supporting carrier for the joint piece, and after the bending part of the longitudinal steel bar of the panel effectively limits the joint piece, the cast-in-place panel and the cast-in-place girder are poured simultaneously, so that the continuous pouring of a floor slab concrete structure is realized, the construction period is further effectively shortened, and the cost is saved.
Preferably, the girder steel reinforcement frame body still includes a pair of fixed connection in the last support reinforcement on girder stirrup upper portion, a pair of fixed connection in the lower support reinforcement of girder stirrup lower part and a plurality of along the inner circle stirrup that the length direction of cast-in-place girder distributes, and support reinforcement and lower support reinforcement are located to the inner circle stirrup cover, and the kink fixed connection in the inner circle stirrup of the vertical reinforcing bar of panel.
By adopting the technical scheme, the upper supporting steel bars and the lower supporting steel bars are arranged to provide the installation carrier for the inner ring stirrups, and the bending parts of the panel steel bars are fixedly connected to the inner ring stirrups, so that the main beam steel bar frame body and the panel steel bar frame body are fixedly connected into a whole, the stability of the connection structure of the cast-in-situ main beam and the cast-in-situ panel is further improved, and the bearing capacity and the anti-stretching stress performance of the cast-in-situ panel are effectively improved.
Preferably, the lower part of prefabricated enhancement limiting plate is seted up and is supplied girder stirrup, the groove of dodging that the inner circle stirrup slided the inlay card, dodges the groove and is provided with a plurality ofly and distribute along the prefabricated length direction who strengthens the limiting plate, and prefabricated enhancement limiting plate slides and inserts and locate girder steel reinforcement support body after, two prefabricated enhancement limiting plate is located between the kink of the panel longitudinal reinforcement of two cast-in-place panels, and the kink butt of panel longitudinal reinforcement is in prefabricated enhancement limiting plate and is kept away from the lateral surface of seam board, and two prefabricated enhancement limiting plates are located between two supporting reinforcement, and the seam board is located the top of girder stirrup, inner circle stirrup.
Through adopting above-mentioned technical scheme, be fixed in the seam board after between two prefabricated enhancement limiting plates, together place on girder steel reinforcement support body to make girder stirrup, inner circle stirrup slide the groove of dodging of the prefabricated enhancement limiting plate of inlay card, make in prefabricated enhancement limiting plate part extends to the region that the girder stirrup encloses, and effectively restrict prefabricated enhancement limiting plate and take place to slide along the length direction of cast-in-place girder.
Preferably, the outer side surface of the joint plate is convexly provided with an insertion block, and the prefabricated reinforcing limiting plate is provided with an insertion groove for the insertion block to be inserted.
Through adopting above-mentioned technical scheme, when installing joint plate and prefabricated limiting plate of strengthening, aim at the grafting piece of joint plate with the inserting groove of prefabricated limiting plate of strengthening, two prefabricated limiting plates of strengthening carry out the pressfitting to joint plate fixed, realize joint plate and the location installation of prefabricated limiting plate of strengthening, reduce joint plate and prefabricated limiting plate of strengthening and take place the possibility that relative slip.
Preferably, the seam board top is slided and is connected with the shielding plate, the seam board up end has been seted up and has been accomodate the chamber of sliding, shielding plate fixedly connected with slides and connects in the connecting plate of accomodating the chamber of sliding, the seam board is provided with the regulating part of adjusting the shielding plate position of sliding.
By adopting the technical scheme, before the cast-in-place girder and the cast-in-place panel are poured, the sliding position of the shielding plate is adjusted through the adjusting piece, so that the shielding plate slides to the upper opening of the filler groove to plug the opening of the filler groove, the possibility that concrete mortar or other sundries fall into the filler groove in the pouring process of the cast-in-place girder and the cast-in-place panel is reduced, and after the cast-in-place girder and the cast-in-place panel are poured and formed, the shielding plate is adjusted to sink through the adjusting piece and is abutted against the joint plate, and then the joint filling material is refilled.
Preferably, the spacing groove has been seted up to the inside wall of inserting groove, the grafting piece is seted up and is linked together in the installation cavity of accomodating the chamber that slides, the grafting piece slides and is connected with and inserts the stopper of locating the spacing groove, connecting plate fixedly connected with slides and connects in the drive block of accomodating the chamber that slides, and the width direction of following prefabricated enhancement limiting plate slides in the installation cavity and is connected with the linkage piece, the one end and the drive block butt of linkage piece, drive block have the butt in the linkage piece with force the linkage piece towards keeping away from the first wedge face that the drive block direction slided, the other end butt of linkage piece in the stopper, the linkage piece has the butt in the stopper with force the stopper towards being close to the second wedge face that the spacing groove direction slided.
Through adopting above-mentioned technical scheme, under the initial condition, the shielding plate butt contracts in the installation cavity in the up end and the stopper of seam board, plug block on the seam board is inserted and is located the inserting groove after, adjust the shielding plate through the regulating part and shift up, the shielding plate slides and drives the drive block and slides, the drive block slides the in-process and promotes the linkage piece through first wedge and slide towards keeping away from the drive block direction, the linkage piece slides the in-process and promotes the stopper through the second wedge and slide towards being close to the spacing groove direction and insert and locate the spacing inslot, thereby effectively reduce plug block and inserting groove and take place the possibility that breaks away from, realize the fixed connection of prefabricated reinforcing limiting plate and seam board.
Preferably, the adjusting piece is an adjusting screw rod rotatably connected to the seam plate, and the thread of the adjusting screw rod penetrates through the shielding plate.
By adopting the technical scheme, the baffle plate is driven to slide along the axial direction of the adjusting screw rod by rotating the adjusting screw rod.
The application provides a concrete expansion joint structure's construction method adopts following technical scheme:
a construction method of a concrete expansion joint structure comprises the following steps:
s1, erecting a formwork, namely erecting a main beam formwork and a panel formwork;
s2, installing a framework, namely respectively supporting the main beam steel bar frame body and the panel steel bar frame body in a pouring cavity defined by the main beam template and the panel template;
s3, installing a joint piece, fixing the reinforcing limiting plates on the main beam steel bar frame body after the joint plate is clamped and fixed by the two prefabricated reinforcing limiting plates, and enabling the bent parts of the longitudinal panel steel bars on the upper part of the panel steel bar frame body to be tightly propped against the outer side surfaces, far away from the joint plate, of the prefabricated reinforcing limiting plates;
s4, installing a joint strip, and plugging the joint strip into a packing groove to prevent impurities from falling into the packing groove;
s5, pouring concrete;
and S6, removing the formwork, removing the main beam formwork and the panel formwork after the concrete reaches the set strength, removing the joint strips, cleaning gaps, and filling joint filler in the filler groove.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the prefabricated reinforcing limiting plate is arranged and partially embedded between the cast-in-place girder and the cast-in-place panel, so that the stability of a connecting structure of the cast-in-place girder and the cast-in-place panel is improved, the bearing capacity and the expansion stress resistance of the cast-in-place panel are effectively improved, the pouring size of the panel can be correspondingly increased in the panel construction process, the maximum distance of expansion joints is increased, the number of the expansion joints is effectively reduced, the construction difficulty is effectively reduced, and the construction period is shortened;
2. before a cast-in-place panel and a cast-in-place girder are poured, a girder steel bar frame body and a panel steel bar frame body are erected, after the bending part of the longitudinal steel bar of the panel extends into the girder steel bar frame body, the girder steel bar frame body provides a support carrier for a joint piece, after the bending part of the longitudinal steel bar of the panel effectively limits the joint piece, the cast-in-place panel and the cast-in-place girder are poured simultaneously, the continuous pouring of a floor slab concrete structure is realized, the construction period is further effectively shortened, and the cost is saved;
3. before the cast-in-place girder and the cast-in-place panel are poured, the sliding position of the shielding plate is adjusted through the adjusting piece, so that the shielding plate slides to the opening at the upper part of the filler groove to plug the opening of the filler groove, the possibility that concrete mortar or other impurities fall into the filler groove in the pouring process of the cast-in-place girder and the cast-in-place panel is reduced, after the cast-in-place girder and the cast-in-place panel are poured and formed, the shielding plate is adjusted to sink through the adjusting piece and abut against the joint plate, and then joint filling materials are refilled.
Drawings
Fig. 1 is a schematic view of a concrete expansion joint structure after casting in embodiment 1.
Fig. 2 is a schematic structural view of a panel reinforcement cage in embodiment 1.
Fig. 3 is a schematic structural view of a girder reinforcement cage in embodiment 1.
Fig. 4 is a schematic view of a connection structure of a girder reinforcement frame body, a panel reinforcement frame body, and a joint in embodiment 1.
FIG. 5 is a schematic view of the structure of a joint in example 2.
FIG. 6 is a schematic view showing the connection structure of the joint plate and the prefabricated reinforcing limit plate in example 2.
Description of reference numerals: 1. casting a main beam in situ; 2. casting a panel in situ; 3. casting a secondary beam in situ; 4. a seam; 41. prefabricating a reinforcing limit plate; 411. an avoidance groove; 412. inserting grooves; 413. a limiting groove; 42. a seaming panel; 421. a sliding cavity is accommodated; 422. an insertion block; 423. a mounting cavity; 424. a linkage block; 425. a limiting block; 426. a second wedge-shaped face; 43. a packing groove; 44. filling a gap; 45. a shielding plate; 451. a connecting plate; 452. a drive block; 453. a first wedge-shaped face; 46. an adjustment member; 5. a main beam reinforcement cage body; 51. a main beam stirrup; 52. main beam inner angle steel bars; 53. upper supporting steel bars; 54. supporting the reinforcing steel bars; 55. an inner ring stirrup; 6. a panel reinforcement cage; 61. a panel stirrup; 62. transverse reinforcing steel bars of the panel; 63. and (5) longitudinal reinforcing steel bars of the panel.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
Example 1:
the embodiment of the application discloses concrete expansion joint structure, refer to fig. 1, including a plurality of along transversely setting up and along longitudinal distribution's cast-in-place girder 1, a plurality of set up in cast-in-place secondary beam 3 between two adjacent cast-in-place girders 1 and a plurality of set up in cast-in-place girder 1 and cast-in-place secondary beam 3 up end's cast-in-place panel 2. The cast-in-place secondary beam 3 is perpendicular to the cast-in-place main beam 1, two sides of the cast-in-place panels 2 are respectively fixed on the two cast-in-place main beams 1, an expansion joint is arranged between every two adjacent cast-in-place panels 2 and is positioned above the cast-in-place main beam 1, and the length direction of the expansion joint is parallel to the length direction of the cast-in-place main beam 1.
Referring to fig. 1, a joint piece 4 arranged in an expansion joint is arranged between a cast-in-situ panel 2 and a cast-in-situ main beam 1, and the joint piece 4 comprises a pair of prefabricated reinforcing limiting plates 41 embedded between the cast-in-situ panel 2 and the cast-in-situ main beam 1 and a joint plate 42 parallel to the prefabricated reinforcing limiting plates 41 and clamped and fixed between the two prefabricated reinforcing limiting plates 41. The length direction of the prefabricated reinforcing limiting plate 41 is parallel to the length direction of the cast-in-place main beam 1, the prefabricated reinforcing limiting plate 41 is a prefabricated concrete plate, and the joint plate 42 is a PVC plate.
Referring to fig. 2 and 3, a main beam reinforcement frame body 5 is embedded in the cast-in-place main beam 1, and a secondary beam reinforcement frame body (not shown) is embedded in the cast-in-place secondary beam 3. The main beam steel bar frame body 5 includes a plurality of main beam stirrups 51 distributed at intervals along the length direction of the cast-in-place main beam 1, a plurality of main beam internal angle steel bars 52 fixed on the main beam stirrups 51, a pair of upper support steel bars 53 fixedly connected to the upper portion of the main beam stirrups 51, a pair of lower support steel bars 54 fixedly connected to the lower portion of the main beam stirrups 51, and a plurality of inner ring stirrups 55 distributed along the length direction of the cast-in-place main beam 1. In this embodiment, girder stirrup 51 is the quadrangle frame, and girder interior angle reinforcing bar 52 is provided with four and distributes in four apex angle departments of girder stirrup 51, places girder stirrup 51 and fixed connection in girder stirrup 51 in girder interior angle reinforcing bar 52 in, and girder interior angle reinforcing bar 52's axial is on a parallel with the length direction of cast-in-place girder 1. Two upper support steel bars 53 and two lower support steel bars 54 are distributed along the length direction of the cast-in-place main beam 1, and the length directions of the upper support steel bars 53 and the lower support steel bars 54 are parallel to the length direction of the inner angle steel bars 52 of the main beam. The inner hoop 55 is fixedly sleeved on the upper support steel bar 53 and the lower support steel bar 54.
Referring to fig. 2 and 4, the cast-in-place panel 2 is pre-embedded with a panel reinforcement frame body 6, and the panel reinforcement frame body 6 comprises a plurality of panel stirrups 61, panel transverse reinforcements 62 fixedly connected to the panel stirrups 61, and panel longitudinal reinforcements 63 fixedly connected to the panel transverse reinforcements 62. The one end bending type of the panel longitudinal reinforcement 63 forms the kink, and the kink that is located the panel longitudinal reinforcement 63 of the panel steel reinforcement support 6 lower part extends to the girder steel reinforcement support 5 in and fixed connection in inner circle stirrup 55, and the kink welded fastening that is located the panel longitudinal reinforcement 63 on the panel steel reinforcement support 6 upper portion is connected in last support bar 53.
Referring to fig. 3 and 4, the lower end surface of the prefabricated reinforcing limiting plate 41 is provided with an avoiding groove 411 along the height direction thereof, and the avoiding groove 411 is used for sliding and clamping the main beam stirrup 51 and the inner ring stirrup 55, and the avoiding groove 411 is provided with a plurality of grooves distributed along the length direction of the prefabricated reinforcing limiting plate 41. After prefabricated enhancement limiting plate 41 slides and inserts and locate girder steel reinforcement support body 5, two prefabricated enhancement limiting plates 41 are located between two upper support bars 53, and are located the kink butt of the vertical reinforcing bar 63 of panel on panel steel reinforcement support body 6 upper portion and keep away from the lateral surface of seam board 42 in prefabricated enhancement limiting plate 41. The upper part of the prefabricated reinforcing limiting plate 41 is bound and fixed on the longitudinal panel steel bar 63/the transverse panel steel bar 62 through the iron wires, and the lower part of the prefabricated reinforcing limiting plate 41 is bound and fixed on the upper supporting steel bar 53 through the iron wires.
The joint plate 42 is located above the main beam stirrups 51 and the inner ring stirrups 55, the upper end face of the prefabricated reinforcing limiting plate 41 is flush with the upper end face of the cast-in-place panel 2 after casting, the upper end face of the joint plate 42 is lower than the upper end face of the prefabricated reinforcing limiting plate 41, a filler groove 43 is formed between the upper end face of the joint plate 42 and the inner side face of the prefabricated reinforcing limiting plate 41, and the filler groove 43 is filled with a filler 44. The joint filler 44 is in the form of sticky paste, and has the properties of firm bonding with the concrete plate wall, good rebound resilience, insolubility in water, no water seepage, no extrusion or flowing at high temperature, strong embedding resistance, aging and cracking resistance, large negative temperature tensile capacity, no brittle fracture at low temperature and good durability. The joint compound 44 may be any one of tar, asphalt, PVC cement, prefabricated rubber strips, modified asphalt, neoprene, tar polyurethane, modified polyurethane, and silicone and polysulfide rubber, and in this embodiment, the joint compound 44 is modified polyurethane.
The embodiment discloses a construction method of a concrete expansion joint structure, which comprises the following steps:
s1, erecting a formwork, namely erecting a main beam formwork, a secondary beam formwork and a panel formwork according to design size requirements.
And S2, installing a framework, namely erecting the main beam steel bar frame body 5, the secondary beam steel bar frame body and the panel steel bar frame body 6 in a pouring cavity defined by the main beam template, the secondary beam template and the panel template respectively.
And S3, installing a joint part 4, clamping and fixing the joint plate 42 through two prefabricated reinforcing limit plates 41, sliding and inserting the joint part 4 into a main beam reinforcement frame body 5, enabling the main beam stirrups 51 and the inner ring stirrups 55 to slide and clamp the avoiding grooves 411 of the prefabricated reinforcing limit plates 41, enabling the prefabricated reinforcing limit plates 41 to partially extend into the area defined by the main beam stirrups 51, effectively limiting the prefabricated reinforcing limit plates 41 to slide along the length direction of the cast-in-place main beam 1, enabling the two prefabricated reinforcing limit plates 41 to be positioned between the two upper support reinforcements 53, binding and fixing the upper parts of the prefabricated reinforcing limit plates 41 to the panel longitudinal reinforcements 63/the panel transverse reinforcements 62 through iron wires, binding and fixing the upper parts of the prefabricated reinforcing limit plates 41 to the bending parts of the panel longitudinal reinforcements 63 positioned on the upper parts of the panel reinforcement frame bodies 6 through iron wires, and enabling the bending parts of the panel longitudinal reinforcements 63 on the upper parts of the panel reinforcement frame bodies 6 to abut against the outer side surfaces of the prefabricated reinforcing limit plates 41 far away from the joint plate 42.
And S4, installing the joint strips, wherein the joint strips are long-strip-shaped and can be embedded in a sectional type and field assembly splicing mode, the joint strips are embedded in the filler grooves 43 to prevent impurities from falling into the filler grooves 43, the joint strips are coated with a release agent before concrete pouring so as to be convenient for later-stage disassembly, and meanwhile, iron wires are tied between two adjacent panel steel bar frame bodies 6 and abut against the upper end surfaces of the prefabricated reinforcing limiting plates 41 and the joint strips.
And S5, pouring concrete.
And S6, removing the formwork, removing the main beam formwork, the secondary beam formwork and the panel formwork after the strength of the concrete reaches 5MPa, removing the joint strips, cleaning gaps, and filling joint filler 44 in the filler groove 43.
Example 2:
referring to fig. 5 and 6, the difference between the present embodiment and embodiment 1 is that a shielding plate 45 is slidably connected above the seam plate 42, a storage sliding cavity 421 is opened on the upper end surface of the seam plate 42, and a connecting plate 451 vertically slidably connected to the storage sliding cavity 421 is fixedly connected to the lower end surface of the shielding plate 45 in a protruding manner. The seam plate 42 is provided with an adjusting piece 46 for adjusting the sliding position of the shielding plate 45, specifically, the adjusting piece 46 is an adjusting screw rod rotatably connected to the seam plate 42, and the adjusting screw rod is threaded through the shielding plate 45.
The outer side surface of the seam plate 42 is convexly provided with a plurality of inserting blocks 422, and the inserting blocks 422 are distributed along the length direction of the seam plate 42. The prefabricated reinforcing limiting plate 41 is correspondingly provided with an inserting groove 412 for inserting the inserting block 422, and the inner side of the top of the inserting groove 412 is vertically provided with a limiting groove 413. The insertion block 422 is provided with an installation cavity 423 communicated with the accommodating sliding cavity 421, the insertion block 422 is connected with a limiting block 425 inserted in the limiting groove 413 in a sliding manner along the length direction of the prefabricated reinforcing limiting plate 41, the connecting plate 451 is fixedly connected with a driving block 452 connected with the accommodating sliding cavity 421 in a sliding manner, a linkage block 424 is connected in the installation cavity 423 in a sliding manner along the width direction of the prefabricated reinforcing limiting plate 41, one end of the linkage block 424 is abutted to the driving block 452, the driving block 452 is provided with a first wedge surface 453 abutted to the linkage block 424 to force the linkage block 424 to slide towards the direction far away from the driving block 452, the other end of the linkage block 424 is abutted to the limiting block 425, and the linkage block 424 is provided with a second wedge surface 426 abutted to the limiting block 425 to force the limiting block 425 to slide towards the direction near the limiting groove 413.
In an initial state, the shielding plate 45 abuts against the upper end face of the joint plate 42 and the limiting block 425 is retracted into the mounting cavity 423, after the insertion block 422 on the joint plate 42 is inserted into the insertion groove 412, the shielding plate 45 is adjusted to move upwards by rotating the adjusting screw, so that the shielding plate 45 slides to a position where the upper end face of the shielding plate 45 is flush with the upper end face of the prefabricated reinforcing limiting plate 41, the shielding plate 45 slides upwards to drive the driving block 452 to slide, the driving block 452 slides upwards to push the linkage block 424 to slide towards a direction away from the driving block 452 through the first wedge surface 453, and the linkage block 424 slides to push the limiting block 425 to slide towards a direction close to the limiting groove 413 through the second wedge surface 426 and is inserted into the limiting groove 413, thereby effectively reducing the possibility of separation between the insertion block 422 and the insertion groove 412 and realizing fixed connection between the prefabricated reinforcing limiting plate 41 and the joint plate 42.
The embodiment discloses a construction method of a concrete expansion joint structure, which comprises the following steps:
s1, erecting a formwork, namely erecting a main beam formwork, a secondary beam formwork and a panel formwork according to design size requirements.
And S2, installing a framework, namely erecting the main beam steel bar frame body 5, the secondary beam steel bar frame body and the panel steel bar frame body 6 in a pouring cavity defined by the main beam template, the secondary beam template and the panel template respectively.
Step S3, installing a joint part 4, and after the joint plate 42 is clamped and fixed through the two prefabricated reinforced limiting plates 41: when the splicing block 422 on the splicing plate 42 is inserted into the splicing groove 412 of the prefabricated reinforcing limiting plate 41, the baffle plate 45 is adjusted to move upwards by rotating the adjusting screw rod, so that the baffle plate 45 slides to the position where the upper end surface of the baffle plate 45 is flush with the upper end surface of the prefabricated reinforcing limiting plate 41, the baffle plate 45 slides upwards to drive the driving block 452 to slide, the first wedge surface 453 pushes the linkage block 424 to slide towards the direction far away from the driving block 452 in the sliding process of the driving block 452, the second wedge surface 426 pushes the limiting block 425 to slide towards the direction close to the limiting groove 413 and be inserted into the limiting groove 413 in the sliding process of the linkage block 424, thereby effectively reducing the possibility that the splicing block 422 and the splicing groove 412 are separated, and after the prefabricated reinforcing limiting plate 41 and the splicing plate 42 are fixedly connected, the splicing piece 4 is slid and inserted into the girder frame body 5, make girder stirrup 51, the groove 411 of dodging of prefabricated reinforcing limiting plate 41 of inlay card that slides of inner circle stirrup 55, make prefabricated reinforcing limiting plate 41 part extend to the regional of girder stirrup 51 enclose in, and effectively restrict prefabricated reinforcing limiting plate 41 and take place to slide along cast-in-place girder's 1 length direction, two prefabricated reinforcing limiting plate 41 are located between two support bar 53, the upper portion ligature that will prefabricate reinforcing limiting plate 41 through the iron wire is fixed in panel longitudinal reinforcement 63/panel transverse reinforcement 62, the upper portion ligature that will prefabricate reinforcing limiting plate 41 through the iron wire is fixed in the kink of panel longitudinal reinforcement 63 that is located panel steel reinforcement 6 upper portion, and make the kink of panel longitudinal reinforcement 63 on panel steel reinforcement 6 upper portion of panel steel reinforcement support tightly to keep away from the lateral surface of seam board 42 in prefabricated reinforcing limiting plate 41.
And S4, pouring concrete.
And S5, removing the formwork, namely removing the main beam formwork, the secondary beam formwork and the panel formwork after the concrete strength reaches 5MPa, rotating the adjusting screw to enable the shielding plate 45 to move downwards to abut against the upper end face of the joint plate 42, and filling the joint material 44 in the filling groove 43.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides a concrete expansion joint structure which characterized in that: the cast-in-place girder comprises a plurality of cast-in-place girders (1) which are transversely arranged and longitudinally distributed and a plurality of cast-in-place panels (2) which are arranged on the upper end surfaces of the cast-in-place girders (1), wherein two sides of each cast-in-place panel (2) are respectively fixed on the two cast-in-place girders (1), an expansion joint is arranged between every two adjacent cast-in-place panels (2), the expansion joint is positioned above the cast-in-place girders (1), the length direction of the expansion joint is parallel to the length direction of the cast-in-place girders (1), a joint piece (4) which is arranged in the expansion joint in the cast-in-place panel (2) and the cast-in-place girders (1) is arranged between the cast-in-place panels (2) and the cast-in-place girders (1), and the joint plate (42) which is arranged between the two prefabricated reinforced limiting plates (41) is arranged between the joint pieces (4).
2. The concrete expansion joint structure of claim 1, wherein: the upper end face of the prefabricated reinforcing limiting plate (41) is flush with the upper end face of the cast-in-place panel (2), the upper end face of the joint plate (42) is lower than the upper end face of the prefabricated reinforcing limiting plate (41), a filler groove (43) is formed between the upper end face of the joint plate (42) and the inner side face of the prefabricated reinforcing limiting plate (41), and filler materials (44) are filled in the filler groove (43).
3. A concrete expansion joint structure according to claim 1, characterized in that: cast-in-place girder (1) pre-buried girder steel reinforcement support body (5) that has, girder steel reinforcement support body (5) include that a plurality of is fixed in girder inner angle reinforcing bar (52) of girder stirrup (51) along the length direction interval distribution of cast-in-place girder (1) and a plurality of, girder stirrup (51) are just placed in along the circumference distribution of girder stirrup (51) in a plurality of girder inner angle reinforcing bar (52), the axial of girder inner angle reinforcing bar (52) is on a parallel with the length direction of cast-in-place girder (1), pre-buried panel steel reinforcement support body (6) that has of cast-in-place panel (2), panel steel reinforcement support body (6) include panel transverse reinforcement (62) and fixed connection in panel longitudinal reinforcement (63) of panel transverse reinforcement (62), the one end bending of panel longitudinal reinforcement (63) forms the kink, the kink of panel longitudinal reinforcement (63) extends to in girder steel reinforcement support body (5), joint spare (4) are fixed in girder steel reinforcement support body (5) and are located between the kink of two panel longitudinal reinforcement (63).
4. A concrete expansion joint structure according to claim 3, characterized in that: girder steel reinforcement support body (5) still include a pair of fixed connection in upper support reinforcement (53) on girder stirrup (51) upper portion, a pair of fixed connection in under bracing reinforcement (54) and the inner circle stirrup (55) that the length direction of a plurality of edge cast-in-place girder (1) distributes of girder stirrup (51) lower part, support reinforcement (53) and under bracing reinforcement (54) are located to inner circle stirrup (55) cover, the kink fixed connection in inner circle stirrup (55) of panel longitudinal reinforcement (63).
5. A concrete expansion joint structure according to claim 4, characterized in that: the lower part of prefabricated enhancement limiting plate (41) is seted up and is supplied girder stirrup (51), inner circle stirrup (55) to slide the card inlay dodge groove (411), dodge groove (411) and be provided with a plurality ofly and distribute along the length direction of prefabricated enhancement limiting plate (41), prefabricated enhancement limiting plate (41) slide insert locate girder steel reinforcement frame body (5) after, two prefabricated enhancement limiting plate (41) are located between the kink of panel longitudinal reinforcement (63) of two cast-in-place panels (2), and the kink butt of panel longitudinal reinforcement (63) keeps away from the lateral surface of seam welding board (42) in prefabricated enhancement limiting plate (41), and two prefabricated enhancement limiting plate (41) are located between two upper support reinforcing bars (53), and seam welding board (42) are located the top of girder stirrup (51), inner circle stirrup (55).
6. A concrete expansion joint structure according to claim 2, characterized in that: the outer side surface of the joint plate (42) is convexly provided with an insertion block (422), and the prefabricated reinforcing limit plate (41) is provided with an insertion groove (412) for inserting the insertion block (422).
7. The concrete expansion joint structure of claim 6, wherein: seam board (42) top is slided and is connected with shielding plate (45), seam board (42) up end has been seted up and has been accomodate chamber (421) that slides, shielding plate (45) fixedly connected with slides and connects in connecting plate (451) of accomodating chamber (421) that slides, seam board (42) are provided with regulating part (46) of adjusting shielding plate (45) position that slides.
8. The concrete expansion joint structure of claim 7, wherein: spacing groove (413) have been seted up to the inside wall of inserting groove (412), connect the installation cavity (423) of intercommunication in accomodating the chamber of sliding (421) in inserting piece (422), insert piece (422) slide and be connected with and insert stopper (425) of locating spacing groove (413), connecting plate (451) fixedly connected with slides and connect in drive block (452) of accomodating the chamber of sliding (421), slide along the width direction of prefabricated enhancement limiting plate (41) in installation cavity (423) and be connected with linkage piece (424), the one end and the drive block (452) butt of linkage piece (424), drive block (452) have the butt in linkage piece (424) with force linkage piece (424) towards keeping away from first wedge face (453) that drive block (452) direction slided, the other end butt of linkage piece (424) in stopper (425), linkage piece (424) have the butt in stopper (425) with force stopper (425) towards being close to the second wedge face (426) that spacing groove (413) direction slided.
9. The concrete expansion joint structure of claim 7, wherein: the adjusting piece (46) is an adjusting screw rod which is rotatably connected to the joint plate (42), and the adjusting screw rod is threaded through the shielding plate (45).
10. A construction method of a concrete expansion joint structure is characterized in that: the method comprises the following steps:
s1, erecting a formwork, namely erecting a main beam formwork and a panel formwork;
s2, installing a framework, namely respectively erecting a main beam steel bar frame body (5) and a panel steel bar frame body (6) in a pouring cavity defined by a main beam template and a panel template;
s3, installing a joint part (4), clamping and fixing the joint plate (42) through two prefabricated reinforcing limit plates (41), fixing the reinforcing limit plates on the main beam steel bar frame body (5), and enabling a bent part of a panel longitudinal steel bar (63) at the upper part of the panel steel bar frame body (6) to be abutted against the outer side face, far away from the joint plate (42), of the prefabricated reinforcing limit plates (41);
s4, installing a joint strip, and plugging the joint strip into the packing groove (43) to prevent impurities from falling into the packing groove (43);
s5, pouring concrete;
and S6, removing the formwork, removing the main beam formwork and the panel formwork after the concrete reaches the set strength, removing the joint strips, cleaning gaps, and filling a joint filler (44) in the filler groove (43).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210853851.5A CN115198902B (en) | 2022-07-12 | 2022-07-12 | Concrete expansion joint structure and construction method thereof |
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| CN202210853851.5A CN115198902B (en) | 2022-07-12 | 2022-07-12 | Concrete expansion joint structure and construction method thereof |
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| CN115198902B (en) | 2023-09-08 |
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