CN111502253A - Jacking type formwork-supporting-free system for beam-concentrating system steel structure building floor and construction method - Google Patents
Jacking type formwork-supporting-free system for beam-concentrating system steel structure building floor and construction method Download PDFInfo
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- CN111502253A CN111502253A CN201910093889.5A CN201910093889A CN111502253A CN 111502253 A CN111502253 A CN 111502253A CN 201910093889 A CN201910093889 A CN 201910093889A CN 111502253 A CN111502253 A CN 111502253A
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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
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
- E04G11/48—Supporting structures for shutterings or frames for floors or roofs
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Abstract
The invention relates to a jacking type formwork-supporting-free system for a beam system steel structure building floor slab and a construction method, and the construction method specifically comprises the following steps: 1) the support-free formwork comprises a fixed seat and a supporting seat, wherein the fixed seat is used for fixing the support-free formwork on the lower flange of the corresponding H-shaped steel beam, and the supporting seat is positioned above the fixed seat; 2) placing a cross beam on the supporting seats of the mould support-free frames which are arranged in pairs; 3) respectively placing end positioning longitudinal beams in spaces between two ends of the cross beam and the upper flanges of the corresponding H-shaped steel beams, and lifting the cross beam until the two positioning longitudinal beams are pressed on the inner sides of the upper flanges of the corresponding H-shaped steel beams, so that all the cross beams are matched to form a cross beam horizontal supporting layer; 4) laying a support longitudinal beam on the horizontal support layer of the cross beam to form a horizontal support layer of the longitudinal beam; 5) and laying steel bar truss floor bearing plates on the longitudinal beam horizontal supporting layer.
Description
Technical Field
The invention relates to a jacking type formwork-supporting-free system for a beam system steel structure building floor and a construction method.
Background
Among the prior art, when supporting the floor carrier plate in the steel construction house, adopt the mode that full hall scaffold supported usually, need a large amount of scaffold pipes as supporting, construction cost is higher, and the construction period is long. And full hall scaffold needs to use ground or floor as the support when the formwork, and this has just led to multilayer floor from bottom to top when pouring in proper order, need wait for just can set up the scaffold frame and construct the one deck floor of back after the solidification of former layer concrete, seriously influences whole construction progress.
And the chinese utility model patent that the bulletin number is CN205259592U discloses a template structure of steel construction floor, and template structure includes supporting beam, support post, regulating block, support longeron and template, and each part all adopts wooden material, and the steel construction floor is the rectangle floor frame that the H shaped steel roof beam constitutes. During construction, the adjusting block is located above the supporting beam, the combined adjusting block and the supporting beam are placed below the upper flange of the H-shaped steel beam and abut against the upper flange, the supporting upright column is knocked into the space between the supporting beam and the lower flange of the H-shaped steel beam, the supporting upright column, the supporting beam, the adjusting block and the H-shaped steel beam are in interference fit, the supporting upright column, the supporting beam, the adjusting block and the H-shaped steel beam are combined into a whole, and finally the supporting longitudinal beam and the template are laid on the supporting beam.
In the prior art, in order to ensure that the supporting stand columns, the supporting cross beams, the adjusting blocks and the H-shaped steel beams are in interference fit, the supporting stand columns can be lengthened by 2-5mm during blanking, the stability after construction is ensured, the supporting stand columns are not easy to knock in during construction, the supporting stand columns and the supporting cross beams are easy to damage during knocking in, and the whole formwork is unstable in structure.
Disclosure of Invention
The invention aims to provide a jacking type formwork-free construction method for a beam system steel structure building floor slab, which aims to solve the technical problem that in the prior art, a supporting upright post needs to be knocked in when a formwork structure of a steel structure building is in lap joint construction, so that the formwork structure is unstable; still provide a formwork system is exempted from with top support formula to steel construction building floor tied in a bundle to solve prior art steel construction building's template structure and need knock in the support post when the overlap joint construction and lead to the unstable technical problem of template structure.
In order to achieve the purpose, the technical scheme of the jacking formwork-free construction method for the beam system steel structure building floor slab is as follows: a jacking type formwork-free construction method for a cluster system steel structure building floor slab comprises the following steps: 1) the support-free formwork comprises a fixed seat and a supporting seat, wherein the fixed seat is used for fixing the support-free formwork on the lower flange of the corresponding H-shaped steel beam, and the supporting seat is positioned above the fixed seat and is arranged on the fixed seat in an adjusting mode through a lifting adjusting device; 2) placing a cross beam on the supporting seats of the mould support-free frames which are arranged in pairs; 3) respectively placing end positioning longitudinal beams in spaces between two ends of the cross beam and the upper flanges of the corresponding H-shaped steel beams, wherein the end positioning longitudinal beams extend along the extension direction of the H-shaped steel beams, and adjusting the height of the supporting seat through a lifting adjusting device to lift the cross beam until the two end positioning longitudinal beams are pressed on the inner sides of the upper flanges of the corresponding H-shaped steel beams, so that all the cross beams are matched to form a cross beam horizontal supporting layer; 4) laying a support longitudinal beam on the horizontal support layer of the cross beam to form a horizontal support layer of the longitudinal beam; 5) and laying a steel bar truss floor bearing plate for performing concrete construction to form a floor slab on the longitudinal beam horizontal supporting layer.
The invention has the beneficial effects that: when the lifting adjusting device is used, after the die-supporting-free frame, the cross beam and the end positioning longitudinal beam are all placed in place, the height of the cross beam and the height of the end positioning longitudinal beam can be adjusted through the lifting adjusting device, the upper end of the end positioning longitudinal beam is pressed against the upper flange, the die-supporting-free frame, the cross beam, the end positioning longitudinal beam and the H-shaped steel beam are stably clamped together from top to bottom, and all cross beams are positioned in the vertical direction, so that all cross beams form a horizontal supporting layer of the cross beam.
Furthermore, the supporting seat is a U-shaped supporting seat with an upward opening, and in the step 2), after the cross beam is placed on the supporting seat without the die support frame, the cross beam is tightly supported and fixed on the U-shaped supporting seat through a cross beam supporting bolt assembled on the U-shaped supporting seat. The opening of U-shaped supporting seat up makes things convenient for putting into of crossbeam, utilizes the tight bolt in crossbeam top can fix the crossbeam on the U-shaped supporting seat steadily, guarantees the stability that the crossbeam was placed.
Further, the beam is any one of a bundling member, C-shaped steel, channel steel and a square steel pipe.
Furthermore, the end positioning longitudinal beam and the supporting longitudinal beam are both made of square wood. The square timber is adopted as the end positioning longitudinal beam and the supporting longitudinal beam, the material of the square timber is light, and the splicing among a plurality of square timbers is convenient.
Further, in step 4), the supporting longitudinal beam is transversely clamped by a clamp clamped on the cross beam so as to prevent the supporting longitudinal beam from moving along the longitudinal direction. Through setting up anchor clamps and making anchor clamps transversely press from both sides tight support longeron, when operating personnel walked on steel bar truss building carrier plate, support the longeron and can not follow vertical drunkenness, avoid appearing supporting the condition that longeron vertical drunkenness and can't support steel bar truss building carrier plate.
The invention discloses a jacking type formwork-supporting-free system for a cluster system steel structure building floor slab, which adopts the technical scheme that: a jacking type formwork-free system for a cluster system steel structure building floor slab comprises two H-shaped steel beams which are arranged in parallel at intervals, a plurality of formwork-free frames are fixedly arranged on each H-shaped steel beam in sequence along the extending direction of the H-shaped steel beam respectively, the formwork-free frames arranged on the two H-shaped steel beams are arranged in pairs along the interval distribution direction of the two H-shaped steel beams, each formwork-free frame comprises a fixed seat fixed on the lower flange of the corresponding H-shaped steel beam respectively, a formwork-free seat positioned above the fixed seat and arranged on the fixed seat in a height-adjustable manner through a lifting adjusting device, a cross beam is placed on the formwork-free frame seat arranged in pairs, the jacking type formwork-free system further comprises end positioning longitudinal beams placed on two end parts of each cross beam, the end positioning longitudinal beams extend along the extending direction of the H-shaped steel beams, the end positioning longitudinal beams are provided with upper end faces used for jacking with the upper flanges on the, the steel bar truss floor support plate is characterized in that all the cross beams are matched to form a cross beam horizontal support layer, a longitudinal beam horizontal support layer formed by supporting longitudinal beams is paved on the cross beam horizontal support layer, and a steel bar truss floor support plate used for concrete construction to form a floor slab is paved on the longitudinal beam horizontal support layer.
The invention has the beneficial effects that: when the lifting adjusting device is used, after the die-supporting-free frame, the cross beam and the end positioning longitudinal beam are all placed in place, the height of the cross beam and the height of the end positioning longitudinal beam can be adjusted through the lifting adjusting device, the upper end of the end positioning longitudinal beam is pressed against the upper flange, the die-supporting-free frame, the cross beam, the end positioning longitudinal beam and the H-shaped steel beam are stably fixed together from top to bottom, and all cross beams are positioned in the vertical direction, so that all cross beams form a horizontal supporting layer of the cross beam.
Furthermore, the supporting seat is a U-shaped supporting seat with an upward opening, the U-shaped supporting seat comprises two vertical plates arranged at intervals, and a cross beam jacking bolt used for clamping and fixing the cross beam between the two vertical plates is assembled on one of the two vertical plates through threads. The opening of U-shaped supporting seat up makes things convenient for putting into of crossbeam, utilizes the tight bolt in crossbeam top can fix the crossbeam on the U-shaped supporting seat steadily, guarantees the stability that the crossbeam was placed.
Further, the beam is any one of a bundling member, C-shaped steel, channel steel and a square steel pipe.
Furthermore, the end positioning longitudinal beam and the supporting longitudinal beam are both made of square wood. The square timber is adopted as the end positioning longitudinal beam and the supporting longitudinal beam, the material of the square timber is light, and the splicing among a plurality of square timbers is convenient.
Further, a clamp used for clamping the supporting longitudinal beam along the transverse direction is clamped on the cross beam at the intersection of the cross beam and the supporting longitudinal beam so as to prevent the supporting longitudinal beam from moving along the longitudinal direction. Through setting up anchor clamps and making anchor clamps transversely press from both sides tight support longeron, when operating personnel walked on steel bar truss building carrier plate, support the longeron and can not follow vertical drunkenness, avoid appearing supporting the condition that longeron vertical drunkenness and can't support steel bar truss building carrier plate.
Drawings
FIG. 1 is a front view of a jacking formwork-supporting-free system for a steel structure building floor slab of a bundling system according to the invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a bottom view of FIG. 1;
FIG. 4 is an enlarged view taken at A in FIG. 3;
FIG. 5 is a perspective view of the jacking formwork-free system for the beam system steel structural building floor of the present invention (the end positioning square timber and the clamp are not shown in the figure);
FIG. 6 is a perspective view of the first formwork free frame of FIG. 5;
FIG. 7 is a front view of the first formwork free frame of FIG. 5;
FIG. 8 is a rear view of FIG. 7;
FIG. 9 is a left side view of FIG. 7;
FIG. 10 is a perspective view of the second scaffold-free frame of FIG. 5;
FIG. 11 is a front view of the second scaffold-free frame of FIG. 5;
FIG. 12 is a perspective view of the clamp of FIG. 1;
description of reference numerals: 100-a first formwork-free frame; 11-a first support; 12-a first sleeve; 13-first clamping seat screw rod; 14-a first bayonet mount; 15-the first clamping seat tightly props the bolt; 16-a nut; 17-a gasket; 18-a first support screw rod; 200-a second formwork-free frame; 21-a second support seat; 211-a second support seat first riser; 212-the second formwork support cross plate; 213-second support seat second vertical plate; 22-beam jacking bolts; 23-a second supporting seat screw rod; a 300-H shaped steel beam; 31-lower flange; 400-a cross beam; 500-supporting square timber; 600-steel bar truss floor support plate; 700-end positioning square timber; 800-a clamp; 81-clamping plate; 82-lightening holes; 83-a groove; 84-inward turned edge; 85-clamping spring.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
The concrete embodiment of the jacking formwork-free system for the beam system steel structure building floor slab of the invention is shown in fig. 1 to 12.
As shown in fig. 1 to 5, the top-supported formwork-free system includes two H-shaped steel beams 300, the H-shaped steel beams 300 extend in the front-rear direction, and the two H-shaped steel beams 300 are arranged at intervals in the left-right direction. A plurality of formwork support-free frames (the formwork support-free frames in the embodiment are divided into two types, one type is a first formwork support-free frame 100, the other type is a second formwork support-free frame 200) are respectively fixed on the inner sides of the lower flanges 31 of the H-shaped steel beams 300, the formwork support-free frames on the two H-shaped steel beams 300 are arranged in pairs, the cross beam 400 is placed on the formwork support-free frames arranged in pairs, and the end positioning square timber 700 is placed on the end parts of the two ends of the cross beam 400. When the horizontal supporting plate is used, the upper ends of the end positioning square timbers 700 are in abutting fit with the inner sides of the upper flanges of the H-shaped steel beams 300, so that all the cross beams 400 are positioned on the same horizontal plane to form a horizontal supporting layer of the cross beam; placed support square timber 500 on crossbeam 400, support square timber 500 extends and has formed the support longeron along the fore-and-aft direction, and all support longerons are located same horizontal plane and have formed longeron horizontal support layer, have placed steel bar truss building carrier plate 600 on longeron horizontal support layer, and the both ends welding of steel bar truss building carrier plate 600 is on H shaped steel roof beam 300, of course, in other embodiments, can adopt to penetrate nail or bolted connection's mode and fix the both ends of steel bar truss building carrier plate 600 on H shaped steel roof beam 300.
The structure of the first mold-supporting-free frame 100 is as shown in fig. 6 to 9, the first mold-supporting-free frame 100 includes a first supporting seat 11, a first clamping seat 14 below the first supporting seat 11, and a lifting adjusting device located between the first supporting seat and the first clamping seat, the first supporting seat 11 is a U-shaped supporting seat having a U-shaped groove, the first supporting seat 11 includes two vertical plates arranged in parallel, and the first supporting seat further includes a supporting transverse plate connecting the two vertical plates. First supporting seat 11 is applicable to the crossbeam 400 of the width adaptation in width and the first supporting seat 11U-shaped groove, puts into the U-shaped inslot with crossbeam 400 after, guarantees that crossbeam 400 can not take place great rocking.
The first clamping seat 14 is a U-shaped clamping seat, and an opening of the first clamping seat 14 is horizontally formed and faces the lower flange 31 when in use. The first clamping seat 14 includes two clamping transverse plates arranged in parallel, and a vertical plate connecting the two clamping transverse plates.
The lifting adjusting device comprises a first supporting seat screw rod 18 and a first clamping seat screw rod 13, the first supporting seat screw rod 18 is fixed on the first supporting seat 11 and extends downwards, the first clamping seat screw rod 13 is fixed on the first clamping seat 14 and extends upwards, and the specific fixing mode adopts a welding fixing mode (in other embodiments, the specific fixing mode can be selected according to the shape and the material of the screw rod, for example, an integrally formed mode or a threaded connection mode can be adopted). The first support seat screw rod 18 and the first clamping seat screw rod 13 are coaxially arranged, the rotating directions of external threads in the first support seat screw rod 18 and the first clamping seat screw rod 13 are opposite, namely, one of the external threads is a forward-rotating thread, and the other external thread is a reverse-rotating thread.
The lifting adjusting device further comprises a first sleeve 12 connected with the first support base screw rod 18 and the first clamping base screw rod 13, internal threads are formed in two ends of the first sleeve 12, the screwing direction of the internal threads at the upper end is the same as that of the threads of the first support base screw rod 18, and the screwing direction of the internal threads at the lower end is the same as that of the threads of the first clamping base screw rod 13. Two ends of the first sleeve 12 are respectively in threaded fit with the first support seat screw rod 18 and the first clamping seat screw rod 13, and when the device is used, the distance between the first support seat 11 and the first clamping seat 14 in the up-down direction can be changed by rotating the first sleeve 12.
In this embodiment, for convenience of processing, and to ensure consistency of the thread matching lengths at the two ends of the first sleeve 12 and stability during screwing, the axial lengths of the internal thread sections at the two ends of the first sleeve 12 are equal. In other embodiments, the axial length of the internal thread segments at the two ends may be different.
In other embodiments, the positions of the sleeve and the screw rod may be interchanged, that is, the sleeve is disposed on the first clamping seat and the first supporting seat, and the screw rod is disposed in the middle. Or in other embodiments, the middle is a combination of a screw rod and a sleeve, for example, one end is the screw rod, and the other end is the sleeve; or the two ends are sleeves, and the middle is a screw rod; or the two ends are screw rods, the middle is a sleeve, and the types of the threaded connecting pieces on the first clamping seat and the first supporting seat are changed accordingly. Compared with the other embodiments, the middle rotating part in the embodiment is a sleeve, so that the screwing is more convenient.
In other embodiments, in order to adjust the height of the first supporting seat, the lifting adjusting device may be in other forms, such as an oil cylinder, an air cylinder, an electromagnetic push rod, and other structures, and may also be in other mechanical forms, such as a form of screw thread rotation adjustment at the upper end of the jack, and the like.
As can be seen from fig. 6, the first clamping seat screw 13 penetrates through the upper clamping cross plate of the first clamping seat 14 and abuts against the lower clamping cross plate. The lower clamping transverse plate of the first clamping seat 14 is provided with a first clamping seat jacking bolt 15 through threads, the end part threads of the first clamping seat jacking bolt 15 are provided with nut gaskets, and the jacking area of the lower flange 31 can be increased through the nut gaskets, so that jacking acting force is increased. The nut gasket comprises a nut 16 which is assembled on the first clamping seat jacking bolt 15 in a threaded mode, and a gasket 17 which is fixed on the nut 16 in a welding mode (in other embodiments, the nut gasket can be integrally formed). As shown in fig. 5, in use, the first clamping seat 14 is clamped outside the lower flange 31, and the first clamping seat tightening bolt 15 drives the nut gasket to press upward against the lower side surface of the lower flange 31, so that the lower flange 31 is clamped and fixed by the gasket 17 and the upper clamping transverse plate of the first clamping seat 14. In other embodiments, when the end surface of the first clamping seat tightly propping the bolt is large enough, the nut gasket can be eliminated. In other embodiments, the first clamping seat tightening bolt can be assembled on the upper clamping transverse plate in a threaded mode.
It can be seen from fig. 9 that, first joint seat top bolt 15 and first joint seat lead screw 13 are arranged at interval in proper order in the left and right direction, first joint seat top bolt 15 is closer to first joint seat lead screw 13, first joint seat top bolt 15 is in the upper and lower direction with first joint seat lead screw 13 purpose and advantage of dislocation arrangement lie in, the assembly is back on lower flange 31, first joint seat lead screw 13 is closer to the intermediate position of two H shaped steel roof beams 300 interval direction of arranging, can reduce the span of crossbeam 400 as far as possible, avoid crossbeam 400 span too big and lead to the intermediate position of crossbeam 400 to take place bending deformation easily. Moreover, the first clamping seat jacking bolt 15 and the first clamping seat screw rod 13 are located on the same straight line in the left-right direction, so that the first clamping seat screw rod 13 can be ensured not to generate torque along the extension direction of the H-shaped steel beam 300 to the first clamping seat jacking bolt 15 and the first clamping seat 14 after being stressed, and the stress stability of the cross beam 400 is ensured.
In the first formwork support-free frame 100, since the first supporting seat 11 is adapted to the width of the cross beam 400, in order to ensure the stability of the support, the horizontal distance between the two vertical plates in the first supporting seat 11 and the axis of the first supporting seat screw 18 is equal.
The second support-free mold frame 200 is different from the first support-free mold frame 100 only in that the second support seat 21 of the second support-free mold frame 200 is different from the first support seat 11 of the first support-free mold frame 100 in structure, as shown in fig. 10 and 11.
The second support seat 21 comprises a first second support seat riser 211 and a second support seat riser 213 which are arranged in parallel at intervals, and further comprises a second support seat supporting transverse plate 212 connected with the first second support seat riser 211 and the second support seat riser 213, and a second support seat screw 23 is fixedly mounted on the second support seat supporting transverse plate 212. A beam jacking bolt 22 is screwed on the second vertical plate 213 of the second support seat. The second free-form frame 200 is suitable for the situation that the size of the beam 400 is not matched with the size of the second support seat 21, and the beam 400 is tightly supported on the first vertical plate 211 of the second support seat by the beam tightly supporting bolt 22.
Because the second die carrier 200 need be used with the beam jacking bolt 22, in order to ensure the stability of the beam 400 in supporting, the horizontal distance between the first vertical plate 211 of the second supporting seat and the axis of the second supporting seat screw 23 is smaller than the horizontal distance between the second vertical plate 213 of the second supporting seat and the axis of the second supporting seat screw 23, so as to ensure that the gravity center of the beam 400 is located on the axis of the second supporting seat screw 23 as much as possible after the beam 400 is jacked and moved by the beam jacking bolt 22.
As can be seen from fig. 1, 3 and 4, a clamp 800 is further disposed at the intersection of the cross beam 400 and the supporting square timber 500, the clamp 800 is clamped on the cross beam 400 and clamps the supporting square timber 500 along the transverse direction to prevent the supporting square timber 500 from moving along the longitudinal direction, and the clamp 800 can be used for clamping two supporting square timbers 500 at the same time and also can be used for clamping a single supporting square timber 500.
The clamp comprises two clamping pieces which are arranged in parallel, at least one of the two clamping pieces is provided with a clamping structure which is clamped on the supporting beam, the two clamping pieces are respectively provided with a clamping part, the two clamping parts are arranged at intervals along the transverse direction to form a clamping channel for placing the corresponding supporting longitudinal beam, and a clamping spring which is used for driving the two clamping pieces to move oppositely so that the two clamping parts clamp the supporting longitudinal beam is arranged between the two clamping pieces.
In the embodiment, the structure of the fixture 800 is as shown in fig. 12, the fixture 800 specifically includes two clamping plates 81 arranged at intervals, each of the two clamping plates 81 is of a plate-shaped structure, a lightening hole 82 is formed in the clamping plate 81 for lightening a supporting load of the cross beam 400, a groove 83 with a downward notch is formed below each clamping plate 81, and inward-turned edges 84 are provided at positions of the notches on two groove walls of the groove 83. A clamping spring 85 is further disposed between the two clamping plates 81, and the clamping spring 85 is a tension spring for driving the two clamping plates 81 to move toward each other to clamp the supporting square lumber 500 between the two clamping plates 81. The cross beam 400 in this embodiment is an i-beam, and the groove 83 and the inward turned edge 84 may be fitted and clamped on the upper flange of the i-beam.
In the embodiment, the clamping structure is formed by arranging the groove 83 and the inward-turned edge 84 on the clamping plate 81, the arrangement mode is simple, and no additional part is required. In this embodiment, the clamping plate 81 constitutes a clamping member, and a portion of the top of the clamping plate 81 for clamping and supporting the square lumber 500 constitutes a clamping portion. In other embodiments, the clamping structure is arranged on only one clamping plate, and the other clamping plate only has the clamping function and does not have the function of clamping on the cross beam. Or in other embodiments, one of the two clamping pieces is provided with a clamping structure clamped on the cross beam, and the clamping piece without the clamping structure is arranged on the clamping piece provided with the clamping structure, and particularly, the clamping piece can be assembled in a hinged or guided moving mode, so that the two clamping pieces can move (including rotating and moving) relatively, and the square timber is clamped and supported.
The construction method of the invention is as follows: as shown in fig. 1 to 5, the method comprises the following steps:
1) the formwork (no matter whether the first formwork 100 or the second formwork 200) is connected to the lower flange 31 of the outer side of the H-shaped steel beam 300 in a clamping mode, a plurality of formwork free devices are sequentially arranged on the H-shaped steel beam 300 along the extending direction of the H-shaped steel beam, the number of the H-shaped steel beams 300 is two, the formwork free devices are arranged in parallel at intervals, and the same number of formwork free devices are arranged on each H-shaped steel beam 300 respectively. Wherein, the formwork-free frames of the two H-shaped steel beams 300 correspond to each other in the direction of the interval arrangement of the two H-shaped steel beams 300, and a plurality of pairs of formwork-free frames (three in this embodiment) are formed. The height of the supporting seat is adjusted through the lifting adjusting device, so that the supporting seat is stable at a position where the cross beam 400 can be placed.
2) Two clamp plates 81 in the clamp 800 are sequentially sleeved on the upper flange of the cross beam 400 from one end of the cross beam 400, the clamp plates 81 are moved to positions where supporting square timbers 500 are to be placed, and the cross beam 400 is placed in a support-free formwork arranged in pairs (if a cross beam jacking bolt 22 is required to jack tightly, jacking operation is performed).
3) The end positioning square timbers 700 are placed in the space between the two ends of the cross beam 400 and the upper flange of the inner side of the H-shaped steel beam 300, the end positioning square timbers 700 extend along the H-shaped steel beam 300, then the heights of the cross beam 400 on the supporting seat and the end positioning square timbers 700 are adjusted through the lifting adjusting device, the top surfaces of the end positioning square timbers 700 are pressed on the upper flange, at the moment, all the cross beams 400 are in a horizontal position, a horizontal cross beam supporting layer is formed, and the end positioning square timbers 700 form a positioning longitudinal beam.
4) The supporting square timbers 500 are laid on the horizontal supporting layer of the cross beam, as shown in fig. 2, the length of a single supporting square timbers 500 is smaller than that of the H-shaped steel girder 300, therefore, two supporting square timbers 500 need to be overlapped, the overlapped part between the two supporting square timbers 500 is fixed together through a clamp 800, meanwhile, the single supporting square timbers 500 are also clamped through the clamp 800, the supporting square timbers 500 form supporting longitudinal girders, and all the supporting longitudinal girders form the horizontal supporting layer of the longitudinal girders.
5) Lay steel bar truss building carrier plate 600 on longeron horizontal support layer, as shown in fig. 1 and 2, the both ends welding of steel bar truss building carrier plate 600 is on the top flange of H shaped steel roof beam 300, and in other embodiments, can adopt to penetrate nail or bolted connection's mode to fix the both ends of steel bar truss building carrier plate on the H shaped steel roof beam, and in other embodiments, can adopt to penetrate nail or bolted connection's mode to fix the both ends of steel bar truss building carrier plate 600 on the H shaped steel roof beam.
6) And carrying out secondary inspection on each structure to eliminate potential safety hazards, and then pouring concrete in the steel bar truss floor bearing plate 600 to form the floor slab of the steel structure building.
7) After the concrete is solidified, the cross beam 400, the supporting square timber 500 and the end positioning square timber 700 can be quickly removed only by loosening the clamping seat.
In the above embodiments, the clamping seat constitutes a fixing seat capable of fixing the support-free mold frame on the H-shaped steel beam, and in other embodiments, in order to fix the support-free mold frame on the lower flange of the H-shaped steel beam, the fixing seat may adopt other forms, such as a fixing block placed on the lower flange, a bolt through hole is formed in the fixing block, a bolt through hole is also formed in the lower flange, and the fixing block is fixedly mounted on the lower flange through a bolt and nut assembly.
In the above embodiment, two support longitudinal beams overlapped with each other form one support longitudinal beam group, and in other embodiments, the number of the support longitudinal beam groups and the number of the support longitudinal beams in each support longitudinal beam group may be changed according to actual conditions.
The cross beam 400 in this embodiment is an i-beam, and in other embodiments, the cross beam is made of any one of a bundling member, C-shaped steel, channel steel, and square steel pipe. Wherein, the bundling member can adopt a combined member disclosed in the Chinese utility model patent with the authorization publication number of CN 207032657U. If the cross beam does not have an upper flange, the clamp needs to be clamped outside the whole cross beam.
In the above embodiments, the support longitudinal beam and the positioning longitudinal beam are both made of square wood, and in other embodiments, the support longitudinal beam and the positioning longitudinal beam may be made of metal longitudinal beams.
In the above embodiment, if the length of single tip location longeron can satisfy and fix a position all crossbeams, then arrange single tip location longeron respectively at the both ends of each crossbeam can, if the length of single tip location longeron is less, then adopt two modes of arranging in proper order to fix a position respectively the both ends of each crossbeam.
In other embodiments, the fixing base may be installed on the outer side of the lower flange of the H-shaped steel beam.
According to the specific embodiment of the jacking formwork-free construction method for the steel structure building floor slab with the cluster system, the jacking formwork-free construction method is the same as the construction method in the embodiment, and the content is not repeated.
Claims (10)
1. A jacking type formwork-free construction method for a cluster system steel structure building floor is characterized by comprising the following steps: the method comprises the following steps: 1) the support-free formwork comprises a fixed seat and a supporting seat, wherein the fixed seat is used for fixing the support-free formwork on the lower flange of the corresponding H-shaped steel beam, and the supporting seat is positioned above the fixed seat and is arranged on the fixed seat in an adjusting mode through a lifting adjusting device;
2) placing a cross beam on the supporting seats of the mould support-free frames which are arranged in pairs;
3) respectively placing end positioning longitudinal beams in spaces between two ends of the cross beam and the upper flanges of the corresponding H-shaped steel beams, wherein the end positioning longitudinal beams extend along the extension direction of the H-shaped steel beams, and adjusting the height of the supporting seat through a lifting adjusting device to lift the cross beam until the two end positioning longitudinal beams are pressed on the inner sides of the upper flanges of the corresponding H-shaped steel beams, so that all the cross beams are matched to form a cross beam horizontal supporting layer;
4) laying a support longitudinal beam on the horizontal support layer of the cross beam to form a horizontal support layer of the longitudinal beam;
5) and laying a steel bar truss floor bearing plate for performing concrete construction to form a floor slab on the longitudinal beam horizontal supporting layer.
2. The jacking formwork-free construction method for the beam system steel structure building floor slab, according to claim 1, is characterized in that: the supporting seat is a U-shaped supporting seat with an upward opening, and in the step 2), the cross beam is tightly fixed on the U-shaped supporting seat through a cross beam jacking bolt assembled on the U-shaped supporting seat after being placed on the supporting seat without a die support frame.
3. The jacking formwork-free construction method for the beam system steel structure building floor slab, according to claim 1, is characterized in that: the beam is any one of a bundling member, C-shaped steel, channel steel and a square steel pipe.
4. The jacking formwork-free construction method for the beam system steel structure building floor slab as claimed in claim 1, 2 or 3, wherein: the end positioning longitudinal beam and the supporting longitudinal beam are both made of square wood.
5. The jacking formwork-free construction method for the beam system steel structure building floor slab as claimed in claim 1, 2 or 3, wherein: in step 4), the supporting longitudinal beam is transversely clamped by a clamp clamped on the cross beam so as to prevent the supporting longitudinal beam from moving along the longitudinal direction.
6. The utility model provides a formwork system is exempted from with top support formula to system steel construction building floor tied in a bundle which characterized in that: the supporting-free formwork system comprises two H-shaped steel beams which are arranged in parallel at intervals, wherein a plurality of supporting-free formwork are fixedly arranged on each H-shaped steel beam in sequence along the extending direction of the H-shaped steel beam, the supporting-free formwork arranged on the two H-shaped steel beams is arranged in pairs along the interval distribution direction of the two H-shaped steel beams, each supporting-free formwork comprises a fixing seat fixed on the lower flange of the corresponding H-shaped steel beam, a supporting die seat positioned above the fixing seat and arranged on the fixing seat in a height-adjustable manner through a lifting adjusting device, cross beams are arranged on the supporting die seats of the supporting-free formwork arranged in pairs, a top supporting type supporting-free formwork system also comprises end positioning longitudinal beams placed on two end parts of each cross beam, the end positioning longitudinal beams extend along the extending direction of the H-shaped steel beams, and are provided with upper end surfaces used for top press-fitting with the upper flange on the inner sides, the beam horizontal supporting layer is paved with a longitudinal beam horizontal supporting layer formed by supporting longitudinal beams, and the longitudinal beam horizontal supporting layer is paved with a steel bar truss floor supporting plate for concrete construction to form a floor slab.
7. The jacking formwork-free system for the beam system steel structure building floor slab as claimed in claim 6, wherein: the supporting seat is a U-shaped supporting seat with an upward opening, the U-shaped supporting seat comprises two vertical plates arranged at intervals, and one of the two vertical plates is provided with a beam jacking bolt used for clamping and fixing the beam between the two vertical plates through a screw thread.
8. The jacking formwork-free system for the beam system steel structure building floor slab as claimed in claim 6, wherein: the beam is any one of a bundling member, C-shaped steel, channel steel and a square steel pipe.
9. The jacking type formwork-free system for the beam system steel structure building floor slab as claimed in claim 6, 7 or 8, wherein: the end positioning longitudinal beam and the supporting longitudinal beam are both made of square wood.
10. The jacking type formwork-free system for the beam system steel structure building floor slab as claimed in claim 6, 7 or 8, wherein: and a clamp for clamping the support longitudinal beam along the transverse direction is clamped at the intersection of the transverse beam and the support longitudinal beam on the transverse beam so as to prevent the support longitudinal beam from moving along the longitudinal direction.
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|---|---|---|---|
| CN201910093889.5A CN111502253A (en) | 2019-01-30 | 2019-01-30 | Jacking type formwork-supporting-free system for beam-concentrating system steel structure building floor and construction method |
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| CN201910093889.5A CN111502253A (en) | 2019-01-30 | 2019-01-30 | Jacking type formwork-supporting-free system for beam-concentrating system steel structure building floor and construction method |
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| CN112814384A (en) * | 2021-02-05 | 2021-05-18 | 中建七局第一建筑有限公司 | Floor slab reverse supporting system based on steel pipe bundle combined structure and construction method |
| CN114592648A (en) * | 2022-03-07 | 2022-06-07 | 安徽富煌钢构股份有限公司 | Assembled steel construction self-supporting floor system limit portion end restraint structure of encorbelmenting |
| CN115405088A (en) * | 2022-08-17 | 2022-11-29 | 济南华强新型建材有限公司 | Support piece for steel structure floor construction and use method thereof |
| CN117365092A (en) * | 2023-10-25 | 2024-01-09 | 巢势科技(上海)有限公司 | A support-free quick formwork method for horizontal structures of nuclear island powerhouses |
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