An assembled box ribbed floor and its construction method

Abstract

The application relates to the technical field of building, in particular to a densely-ribbed floor of an assembled box and a construction method thereof, wherein the assembled box is composed of a top plate, a bottom plate and a side wall cylinder; the top surface of the top plate is provided with a connecting seat; the connecting seats of adjacent core mold bodies are connected through steel bars; the connecting seat is provided with a plurality of circumferentially distributed clamping grooves; the steel bars are arranged in the clamping grooves; the space of the clamping grooves around the steel bars is filled with cement mortar; a blocking groove is arranged on the clamping groove along the length direction of the clamping groove; a functional component is inserted into the blocking groove; the functional component is a rubber pad or a brick used for abutting against the end of the steel bar; the bottom surface of the top plate is provided with an embedded male die used for inserting the rubber pad. The connecting seat is arranged on the upper portion of the assembled box, i.e. the core mold body; the steel bars are inserted into the connecting seat; the core mold bodies are preliminarily connected and fixed by the steel bars before concrete pouring; the positioning effect of the assembled box is strengthened; and the displacement of the assembled box in the construction process is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building, in particular to a prefabricated box dense rib floor and a construction method thereof. BACKGROUND

[0002] The prefabricated box concrete hollow floor is composed of prefabricated boxes and cast-in-place dense rib beams, and belongs to a semi-prefabricated large-span structure construction. The prefabricated box concrete hollow floor has the characteristics of both prefabricated and cast-in-place floor structures, and has the advantages of simplified construction process, excellent work performance, good comprehensive economic benefits and the like. The prefabricated box concrete hollow floor has a good application prospect. The Ministry of Housing and Urban-Rural Development has issued the Technical Specification for Prefabricated Box Concrete Hollow Floor Structure (JGJ / T 207-2010) to clearly define the construction provisions and design provisions, and to provide technical support for the application and development of the prefabricated box concrete hollow floor. At present, there are still problems to be further solved in the research on the prefabricated box concrete hollow floor, such as installation and fixing problems. The prefabricated box installation and fixing method is not good, and the prefabricated box is easy to deviate during the construction process, so as to cause the rib beam width between the prefabricated boxes to be too narrow or too wide, and cause quality problems. SUMMARY

[0003] In order to make the prefabricated box concrete hollow floor more stable and not easy to deviate during the construction process, and to increase the application and promotion of the prefabricated box concrete hollow floor system, the present application intends to carry out the key technology research on the prefabricated box concrete hollow floor structure and construction in view of the existing problems of the current product, so as to form a more safe, efficient, reliable and economic prefabricated box concrete hollow dense rib floor construction technology. The present application provides a prefabricated box dense rib floor and a construction method thereof.

[0004] The prefabricated box dense rib floor and the construction method thereof provided by the present application adopt the following technical scheme:

[0005] The prefabricated box dense rib floor comprises a core mold body in a box shape, which is composed of a top plate, a bottom plate and a side wall cylinder. The top surface of the top plate is provided with a connecting seat. The connecting seats of adjacent core mold bodies are connected through steel bars. The connecting seat is provided with a plurality of circumferentially distributed clamping grooves. The steel bars are arranged in the clamping grooves. The top surface of the connecting seat is provided with an upper opening of the clamping groove. The upper opening of the clamping groove is provided with a blocking portion for preventing the steel bars from falling out. The space of the clamping groove around the steel bar is filled with cement mortar. The side surface of the connecting seat is provided with a side opening of the clamping groove. The side opening of the clamping groove is in the length direction of the clamping groove to the middle part of the connecting seat. A plurality of blocking grooves for dividing the clamping grooves are arranged along the length direction of the clamping groove. Functional components are inserted into the blocking grooves. The functional components are rubber pads or bricks for abutting against the end part of the steel bar. The bottom surface of the top plate is provided with an embedded convex mold for inserting the rubber pad.

[0006] By adopting the technical scheme, the connecting seat is arranged at the upper part of the assembly box, i.e., the core mold body, the reinforcing bars are inserted into the connecting seat, the core mold bodies are preliminarily connected and fixed by the reinforcing bars before the concrete pouring, the positioning effect of the assembly box is strengthened, and displacement of the assembly box in the construction process is avoided; meanwhile, in the two-way slab construction, the laying method of the rib width change is also adopted to solve the problems of low hollow rate of the hollow floor, excessive prestressed reinforcement and high cost, the width of the secondary rib beam close to the main rib beam in the floor layer can be set smaller, i.e., the distance between the adjacent assembly boxes is smaller. Therefore, when the reinforcing bars with the same standard length are adopted, the distance between the adjacent assembly boxes can be judged according to the abutting condition between the reinforcing bars and the blocking groove or the bricks, so that the construction requirements of different rib beam widths are verified, and the engineering management quality is facilitated to improve. On the other hand, when hoisting, the rubber pad is replaced into the blocking groove, the rubber pad is matched into the embedded male die, the position firmness between the two stacked top plates is strengthened, higher rubber pads are adopted, the upper and lower adjacent top plates are not in contact, the problems of the heavy prefabricated assembly box, the easy knocking or interlayer sliding damage of the box body caused by the mechanical hoisting are avoided.

[0007] Preferably, the connecting seat is provided with a clamping seat and a reinforcing bar member in the middle part, the reinforcing bar member is provided with a bent part at both ends, the clamping seat is provided with a groove cavity, the top surface of the groove cavity is provided with an insertion port, the bent part at one end of the reinforcing bar member enters the groove cavity through the insertion port and is clamped in the groove cavity after being rotated, and the bent part at the other end of the reinforcing bar member is connected with a cast-in-place steel mesh layer arranged above the core mold body.

[0008] By adopting the technical scheme, the reinforcing bar member can also be made on site during construction, the prepared reinforcing bar member is directly inserted into the clamping seat arranged in the middle part of the connecting seat, the upper end of the vertical reinforcing bar member is bound with the cast-in-place steel mesh layer by using the iron wire, the cast-in-place steel mesh layer structure can be fixed to avoid collapse or protrusion, and the quality of the cast-in-place layer is improved.

[0009] Preferably, the bottom plate is provided with an outwardly extending anchoring rib, the anchoring rib is provided with a bent part at the end, the middle part of the bottom plate is provided with a drain hole, and the outer periphery of the bottom plate is provided with a plurality of shear tooth grooves.

[0010] By adopting the technical scheme, the anchoring rib is inserted into the rib steel frame to improve the connection between the bottom plate and the cast-in-place concrete layer and the overall structure.

[0011] Preferably, the bottom surface of the bottom plate is provided with a sealing rubber ring in the circumferential direction.

[0012] By adopting the technical scheme, the sealing rubber ring can improve the sealing property between the bottom plate and the bottom mold plate to prevent slurry leakage.

[0013] Preferably, the inner side of the bottom plate is provided with a plurality of hoisting connecting members, the hoisting connecting member includes two oppositely arranged columns, and a reinforcing bar section is connected between the two columns.

[0014] By adopting the technical scheme, the hoisting connecting piece can facilitate hoisting of the bottom plate during construction.

[0015] Preferably, the side wall cylinder is a rectangular structure enclosed by four walls, and a positioning rope is connected between two opposite inner walls.

[0016] By adopting the technical scheme, the positioning rope is connected between two opposite inner walls of the side wall cylinder, which solves the problem of instability and easy deviation of the side wall cylinder of the assembly box as a side mold of the ribbed beam structure beam, and the problem of insufficient ribbed steel reinforcement cover and even exposed reinforcement.

[0017] Preferably, the side wall cylinder is provided with flange parts on the upper side and the lower side respectively, a blocking strip is fixed between the two flange parts, the positioning rope passes through the blocking strip and is connected with a pressing piece, a spring is arranged between the pressing piece and the blocking strip, a waterproof roll layer is arranged on the outer wall of the side wall cylinder, and a delayed extension section is arranged in the middle of the positioning rope.

[0018] By adopting the technical scheme, after the cast-in-place concrete layer is poured, the positioning rope loses the restraint of the spring as the delayed extension section of the positioning rope is elongated, the spring restores the elongation between the pressing piece and the blocking strip, the pressing piece is pressed towards the side wall cylinder, the side wall cylinder as a thin plate has a tendency to protrude outward under the action of the pressing piece, the waterproof roll layer is tightly attached to the cast-in-place concrete layer, the problem of seepage and cracking of the assembly box concrete hollow floor is reduced, and the opening of the pipeline passing through the assembly box side wall cylinder in the pipeline pre-burying process is conveniently and reliably sealed.

[0019] Preferably, the delayed extension section is provided with a sealing cylinder, a left piston and a right piston which can slide along the length direction of the sealing cylinder are arranged in the sealing cylinder, the left piston is connected with the right section of the positioning rope, the right piston is connected with the left section of the positioning rope, a sealing chamber is arranged between the left piston and the right piston, the sealing cylinder in the middle of the sealing chamber is provided with an inflation valve port and an exhaust valve port, a sealing screw is threadedly connected in the exhaust valve port, and a micro exhaust passage is arranged between the sealing screw and the exhaust valve port.

[0020] By adopting the technical scheme, the delayed extension section can adopt an electronic timing cut-off device, the positioning rope is connected with the piston in the sealing cylinder to reduce the air pressure in the sealing cylinder, the positioning rope is stretched to both sides to lose the restraint of the spring, and the attachment waterproof effect of the waterproof roll layer and the cast-in-place concrete layer is realized.

[0021] Preferably, the thread section of the sealing screw is provided with a rubber belt ring layer.

[0022] By adopting the technical scheme, the number of the rubber belt ring layer is used to control the exhaust amount between the sealing screw and the exhaust valve port, and the elongation time of the delayed extension section is controlled.

[0023] A construction method of an assembled box ribbed floor, comprising the following steps:

[0024] Construction preparation: quality inspection of the assembled box prefabricated components, including the top plate, bottom plate and side wall cylinder of the core mold body, and checking the wall body or the height and axis;

[0025] Hoisting of the assembled box components: placing a short steel pipe on the bottom of the first top plate, inserting a rubber pad into the blocking groove on the top surface of the second top plate, then stacking the second top plate with the first top plate with the top surface downward, so that the rubber pad is fitted into the embedding convex mold on the bottom surface of the first plate, and placing a pad between the bottom plates when stacking the bottom plates, then using a special hoisting tool to cover the steel pipe with a lifting ring, vertically lifting and hoisting the plate to the stacking or construction position;

[0026] Laying of the bottom plate formwork: full-lot laying of the bottom formwork;

[0027] Positioning of the assembled box: according to the axis size of the construction drawing, the rib beam edge line, i.e. the position line of the outer edge of the assembled box, is popped out on the bottom formwork that has passed the acceptance check, so as to ensure the accurate positioning of the assembled box; special marks are made on the hidden box of the assembled box using red paint to prevent misplacement of the box;

[0028] Installation of the bottom plate of the assembled box: before laying, check whether there is a reserved drain hole in all the bottom plates, and arrange the bottom plates according to the position line of the assembled box according to the box type layout drawing;

[0029] Binding of the rib beam reinforcement: binding of the rib beam reinforcement according to the requirements;

[0030] Laying of the pipe: including installation of the junction box at the hole of the bottom plate, installation of the horizontal pipe at the hole of the side wall cylinder, and reservation of the hole for the fire-fighting pipe, water supply and drainage pipe in the cast-in-place concrete layer above the top plate;

[0031] Installation of the side wall cylinder of the assembled box: installing the side wall cylinder of the assembled box on the bottom plate of the assembled box;

[0032] Installation of the top plate of the assembled box: installing the top plate according to the box type layout drawing, and fitting the steel bars into the clamping groove of each top plate connecting seat to connect the core mold bodies, then inserting the bricks into the blocking groove according to the rib beam width requirements, so that the bricks abut against the steel bars, and checking whether the rib beam width meets the construction requirements according to the abutment condition, then filling the cement mortar into the clamping groove;

[0033] Pouring of concrete: after the rib beam reinforcement and the steel bar mesh layer above the top plate are bound, pouring of the concrete is carried out.

[0034] By adopting the technical scheme, the assembly box dense rib floor construction method is simple in process operation and can be operated by common workers. Meanwhile, the components can be made of waste materials on site, which is convenient in material selection; compared with other core mold fixing measures, the method is simple, low in cost, safe and reliable in engineering quality, and provides a reliable reference for similar projects in the future.

[0035] In summary, the present application includes at least one of the following beneficial technical effects:

[0036] 1. The present application sets a connecting seat on the upper part of the assembly box, i.e. the core mold body, and inserts a steel bar into the connecting seat, so that the core mold bodies are preliminarily connected and fixed by the steel bar before concrete pouring, which strengthens the positioning effect of the assembly box and avoids displacement of the assembly box during construction.

[0037] 2. In the present application, the rubber pad is replaced in the blocking groove during hoisting, and the rubber pad is matched with the embedded male die, which strengthens the position firmness between the two stacked top plates, and the use of high rubber pad makes the adjacent top plates not contact, which solves the hoisting problem of the assembly box prefabricated component due to its large weight, mechanical hoisting, easy knocking or interlayer sliding damage to the box.

[0038] In the present application, the extension of the positioning rope between the opposite side walls makes the compression member press the side wall cylinder, so that the side wall cylinder of the thin plate is convex, the waterproof roll layer is closely combined with the cast-in-place concrete layer, and the opening in the pipeline pre-burying process is conveniently and reliably sealed. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is a schematic diagram of the assembly structure of the present application.

[0040] Figure 2 is a schematic diagram of the connecting seat structure of the present application.

[0041] Figure 3 is a schematic diagram of the top plate hoisting structure of the present application.

[0042] Figure 4 is a schematic diagram of the core mold body structure of the present application.

[0043] Figure 5 is Figure 4 the enlarged schematic diagram of A part in

[0044] Explanation of reference signs: 1, top plate; 11, connecting seat; 111, clamping seat; 112, steel bar; 113, bending part; 114, groove; 115, plug-in port; 12, steel bar; 13, clamping groove; 131, blocking part; 132, blocking groove; 14, functional assembly; 15, embedded convex die; 2, bottom plate; 21, anchoring steel; 211, bent part; 22, shear tooth groove; 23, hoisting connecting piece; 24, outer groove; 3, side wall cylinder; 31, positioning rope; 32, flange part; 33, blocking strip; 34, pressing piece; 35, spring; 36, sealing cylinder; 361, left piston; 362, right piston; 363, sealing chamber; 364, inflation valve; 365, exhaust valve; 366, sealing screw; 367, adhesive tape ring layer; 4, waterproof roll material layer; 5, cast-in-place steel mesh layer. DETAILED DESCRIPTION

[0045] The following will be described in detail in combination with the accompanying drawings Figures 1-5 The present application is further described in detail.

[0046] Reference Figures 1-5 The embodiment of the present application discloses a prefabricated box ribbed floor, which comprises a core mold body in box structure, the core mold body is composed of a top plate 1, a bottom plate 2 and a side wall cylinder 3, the top surface of the top plate 1 is provided with a connecting seat 11, the connecting seat 11 is integrally formed with the top plate 1, and the connecting seats 11 of adjacent core mold bodies are connected through steel bars 12. The connecting seat 11 is provided with four clamping grooves 13 which are evenly distributed at 90 degrees in the circumferential direction, the steel bar 12 is arranged in the clamping groove 13, the top surface of the connecting seat 11 is provided with an upper opening of the clamping groove 13, the steel bar 12 enters the clamping groove 13 from the upper opening of the clamping groove 13, the upper opening of the clamping groove 13 is provided with a blocking part 131 for preventing the steel bar 12 from falling out, and the space of the clamping groove 13 around the steel bar 12 is filled with cement mortar, which limits the steel bar 12 below the blocking part 131 and prevents the steel bar 12 from falling out. The side surface of the connecting seat 11 is provided with a side opening of the clamping groove 13, the steel bar 12 passes out of the side opening of the clamping groove 13 and is connected with the clamping groove 13 of the next core mold body. The direction from the side opening of the clamping groove 13 to the middle part of the connecting seat 11 is the length direction of the clamping groove 13, a blocking groove 132 for dividing the clamping groove 13 is arranged along the length direction of the clamping groove 13, the blocking groove 132 is provided with a functional assembly 14, the functional assembly 14 is a rubber pad or a brick for abutting against the end of the steel bar 12, the bottom surface of the top plate 1 is provided with an embedded convex die 15 for inserting the rubber pad, the functional assembly 14 is a detachable and replaceable assembly, when used for supporting, the rubber pad which can be recycled repeatedly is adopted, and the blocking grooves 132 in the same clamping groove 13 can all be provided with rubber pads. When the functional assembly 14 is used for abutting, the brick is adopted, and generally only one brick is arranged in the same clamping groove 13.

[0047] Reference Figure 2The middle part of the connecting seat 11 is provided with a clamping seat 111 and a steel rod 112. The two ends of the steel rod 112 are respectively provided with L-shaped bending parts 113. The clamping seat 111 is provided with a groove cavity 114. The top surface of the groove cavity 114 is provided with a plug-in port 115. The L-shaped bending part 113 at one end of the steel rod 112 enters the groove cavity 114 through the plug-in port 115 and is clamped in the groove cavity 114 after being rotated. The L-shaped bending part 113 at the other end of the steel rod 112 is connected with the cast-in-place steel mesh layer 5 arranged above the core mold body. The steel rod 112 with a double L-shaped bending structure is convenient for material selection. In addition, other steel rods 112 with other shapes such as S-shaped and Z-shaped can also be used.

[0048] With reference to Figure 4 The bottom plate 2 is provided with an outwardly extending anchoring rib 21. The anchoring rib 21 is a horizontal and longitudinal rib strip arranged in the forming of the bottom plate 2 and buried. The end of the anchoring rib 21 is provided with a bent part 211. The middle part of the bottom plate 2 is provided with a drain hole. The lower edge of the outer periphery of the bottom plate 2 is provided with a plurality of shear teeth grooves 22. The bottom surface of the bottom plate 2 is provided with a sealing rubber ring in the circumferential direction. The inner side of the bottom plate 2 is provided with a plurality of hoisting connecting pieces 23. The hoisting connecting piece 23 includes two oppositely arranged stand columns. The two stand columns are connected with a steel rod section.

[0049] With reference to Figures 4-5 The side wall cylinder 3 is a rectangular structure surrounded by four wall surfaces. The two opposite inner wall surfaces are connected with a positioning rope 31. The upper and lower sides of the side wall cylinder 3 are respectively provided with flange parts 32. The upper part of the flange part 32 is provided with a buckling part. The buckling part is the rectangular edge of the side wall cylinder 3. The top plate 1 and the bottom plate 2 are respectively provided with outer grooves 24 buckled with the buckling part. When the positioning rope 31 is pulled inward, the buckling part of the side wall cylinder 3 is blocked by the outer grooves 24 of the top plate 1 and the bottom plate 2, so that the side wall cylinder 3 does not sharply sag inward. The two flange parts 32 are fixed with a blocking strip 33. The positioning rope 31 passes through the blocking strip 33 and is connected with a pressing piece 34. The pressing piece 34 and the blocking strip 33 are provided with a spring 35. The outer wall surface of the side wall cylinder 3 is provided with a waterproof coiled material layer 4 which can be laid by adhesion. The middle part of the positioning rope 31 is provided with a delayed extension section. The delayed extension section is provided with a sealing cylinder 36. The sealing cylinder 36 is provided with a left piston 361 and a right piston 362 which can slide along the length direction of the sealing cylinder 36. The right section of the positioning rope 31 passes through the right piston 362 and is connected with the left piston 361. The left section of the positioning rope 31 passes through the left piston 361 and is connected with the right piston 362. If a simple sealing is used, the positioning rope 31 also produces a certain air leakage when passing through the sealing cylinder 36. The left piston 361 and the right piston 362 are provided with a sealing cavity 363. The middle part of the sealing cylinder 36 in the sealing cavity 363 is provided with an inflation valve port 364 and an exhaust valve port 365. The exhaust valve port 365 is threadedly connected with a sealing screw 366. The threaded section of the sealing screw 366 is provided with a rubber band ring layer 367. The sealing screw 366 and the exhaust valve port 365 are left with a micro air outlet channel.

[0050] The construction method of the assembled box ribbed floor of the building comprises the following steps:

[0051] Construction preparation: the quality of the prefabricated components of the assembled box is inspected, including the top plate 1, the bottom plate 2 and the side wall cylinder 3, etc., mainly checking the product factory qualification certificate, test report, surface quality of the assembled box, checking whether there are cracks and defects, and checking the wall body or the label height and the axis.

[0052] Hoisting of the assembled box components: after the assembled box components arrive at the construction site, hoisting is carried out using a tower crane or other lifting equipment. A short steel pipe is placed on the bottom of the first top plate 1, the steel pipe is 100 mm away from the outer edge of the plate, a rubber pad is inserted into the blocking groove 132 on the top surface of the second top plate 1, then the top surface of the second top plate 1 is stacked downward with the first top plate 1, the rubber pad is matched into the embedding convex die 15 on the bottom surface of the first plate, and a pad is placed between the bottom plates 2 when the bottom plates 2 are stacked. After a plurality of top plates 1 or bottom plates 2 are stacked, a special hoisting tool is used to hoist the plate member vertically to the stacking or construction position. The stacking site should be leveled and solidified in advance. The assembled box should be stacked according to different types and specifications. A pad should be placed at the four corners of each plate, and the stacking height of the plate should be preferably not more than eight layers.

[0053] Laying of the bottom plate 2 formwork: full-floor laying of the bottom formwork; when the span of the ribbed beam hollow floor is greater than 6 m, the formwork is arched. When there is no clear specification in the drawing, the arch height is set as 1 / 400 of the short span size.

[0054] Positioning line of the assembled box: according to the axis size of the construction drawing, the ribbed beam edge line, i.e. the position line of the outer edge of the assembled box, is popped out on the bottom formwork that has been accepted and qualified, so as to ensure the accurate positioning of the assembled box; the position of the hidden box of the assembled box is marked with red paint, so as to prevent the misplacement of the box.

[0055] Pasting of the sealing rubber strip: in order to avoid the damage of the rubber strip ring layer 367 of the bottom plate 2 during transportation, the arrangement of the rubber strip ring layer 367 is carried out at the construction site in this embodiment. Specifically, a 20 mm x 10 mm wide x thick specification sponge single-sided rubber strip is pasted on the bottom formwork, offsetting 30 mm inward from the ribbed beam edge line of the assembled box outer edge line. The sponge rubber strip requires high compressibility, high elasticity and low density. A 15 mm x 5 mm wide x thick specification double-sided rubber strip can also be pasted to form the rubber strip ring layer 367. The rubber strip ring layer 367 should be consistent in size with the outer edge line of the assembled box, and should be firmly pasted with the formwork. The loose parts should be nailed firmly with small iron nails. The rubber strip ring layer 367 can seal the gap between the formwork and the bottom box, preventing the leakage of the assembled box between the bottom plate 2 and the formwork.

[0056] Install the bottom plate 2 of the assembly box: hoist the bottom plate 2 by connecting the equipment lifting hooks with the lifting connectors 23 of the bottom plate 2. Before laying the plate, check all the reserved drain holes in the middle of the bottom plate 2, and lay the bottom plate 2 according to the assembly box position line on the box type layout paper.

[0057] Bind the rib beam steel bars: bind the rib beam steel bars according to the requirements; when cutting the main rib beam steel bars and stirrups, pay attention to the requirements of the drawing for the thickness of the steel bar protective layer. In this embodiment, the lateral protective layer is 10 mm, and the upper and lower protective layers are 25 mm thick.

[0058] Lay the wire pipe, including:

[0059] Install the junction box in the hole of the bottom plate 2, and the horizontal pre-buried wire pipe and the assembly box construction can be carried out alternately. After the bottom plate 2 of the assembly box is placed, mark the position of the junction box according to the drawing, and if it is located in the rib beam, the junction box must be moved to the bottom plate 2 of the assembly box. Cut a hole in the bottom plate 2 of the assembly box with a cutting machine, and the hole is slightly larger than the junction box. When cutting the hole, make sure that the edge of the bottom plate 2 of the assembly box is not damaged within a range of 200 mm. After the horizontal wire pipe is installed, fix the junction box with 1:2 cement mortar, and if the hole is large, use a small wooden strip with steel wire to block and reinforce the part where the wire pipe passes through the side frame to prevent the leakage of grouting concrete.

[0060] After the side wall cylinder 3 is installed, install the horizontal wire pipe in the hole of the side wall cylinder 3, and then construct the horizontal wire pipe after the rib beam steel bars are bound. When constructing, the wire pipe is connected with the junction box by being tightly attached to the edge rib beam of the bottom plate 2. When installing the side frame of the assembly box, only need to cut a hole in the corresponding side frame of the wire pipe. The side wall cylinder 3 can be cut by a cutting floor tile grinding wheel, and the cutting diameter is 1.5 cm to 2.5 cm. The wire pipe hole can only be located on the side frame, and the edge rib of the bottom plate 2 of the assembly box must not be damaged. The wire pipe hole is located on the upper side or the lower side of the waterproof roll material layer 4, and the middle part of the waterproof roll material layer 4 is attached to the rib beam under the pressing of the pressing member 34 to achieve the effect of preventing leakage.

[0061] After the top is installed, reserve the reserved hole of the fire pipe and the water supply and drainage pipe in the cast-in-place concrete layer above the top plate 1; if the reserved hole is located on the assembly box, when the hole diameter is less than 120 mm, directly drill a hole with a water drill, and the rib beam must not be damaged; when the hole diameter is greater than 120 mm, it must be proposed in advance and needs to be specially treated after calculation. The reserved hole of the dense rib floor should be opened between the ribs, and the ribs of the dense rib plate are not allowed to be disconnected, and the plate rib is disconnected when encountering the hole.

[0062] Install the side wall of the assembly box: install the side wall of the assembly box on the bottom plate 2 of the assembly box; the side wall cylinder 3 should be installed on the outer groove 24 of the bottom plate 2. The size of the side wall cylinder 3 should match the size of the assembly box. After the side wall cylinder 3 is placed on the bottom plate 2, it must be completely inserted into the outer groove 24, and most importantly, the four corners must be inserted into the groove. When the total height of the assembly box is greater than or equal to 500 mm, iron wire is used to connect adjacent side wall cylinders 3 to improve the ability of the side wall to resist lateral pressure.

[0063] Install the top plate 1 of the assembly box: inflate the inflation valve port 364 of the sealed cylinder body 36, then refer to the box type layout paper, install the top plate 1, and insert the steel bar 12 into the clamping groove 13 of each top plate 1 connecting seat 11 to connect the core mold body, then according to the width requirement of the rib beam, insert the brick into the blocking groove 132 to make the brick abut against the steel bar 12, and according to the abutment condition, check whether the width of the rib beam meets the construction requirement, then fill the cement mortar in the clamping groove 13. The prepared steel bar 112 is directly inserted into the clamping seat 111 provided in the middle of the connecting seat 11, and the vertical steel bar 112 is positioned by binding the upper end of the steel bar 112 with the cast-in-place steel mesh layer 5 using iron wire. After placing the top plate 1, it is necessary to ensure that it is inserted into the groove. If it is not inserted into the groove, a 20 mm steel crowbar can be used to push the plate into the groove. After installing the top plate 1 of the assembly box, check the position of the assembly box, and if adjustment is needed, use a steel crowbar to adjust it. The cast-in-place steel mesh layer 5 in the top plate 1 of the assembly box is bound, and the average thickness of the cast-in-place layer is 150 mm, with double-layer double-direction steel mesh inside. After binding, a construction access road should be set up to avoid the box body being stepped on by construction personnel or the construction machinery being placed on the box body. Pouring concrete: after the rib beam steel and the top plate 1 above the concrete steel mesh layer are bound, the box body is checked again, and the box body with loose or deviated position is treated. If the box body is damaged, it should be replaced or sealed on site in time to avoid pouring concrete into the box body. Finally, the concrete is poured.

[0064] Post-pouring belt construction: since the hollow floor needs to be left for post-pouring belt, the width of the post-pouring belt is 800 mm, and the quick and easy closing net is installed before pouring concrete; the concrete of the post-pouring belt should be poured at least 45 days later, and then the post-pouring belt construction can be carried out. The concrete of the post-pouring belt should use non-shrinkage concrete or micro-expansion concrete, and the concrete strength grade is C40.

[0065] Concrete pouring: this embodiment uses pumped commercial concrete; for the negative one layer hollow slab area, try to use car pump pouring, if the site does not have the conditions to use car pump, use the distribution machine to pour. The structural concrete is first poured into the column and shear wall vertical components using the tower crane, then the formwork support frame is connected or tightened with the already poured frame column and shear wall, and then the beam and slab horizontal components of the structure are poured.

[0066] Concrete pouring: When pouring concrete, the assembled box wall panels, box top side walls, and box bottom side walls should be sprayed with water in advance to prevent the cast-in-place concrete from losing water and affecting the strength of the concrete. The concrete should be prepared according to the design requirements, the aggregate should be selected from stones and medium sand with a particle size of 3-40 mm, and different types of water reducing agents should be selected according to the seasonal temperature difference, and the slump should be controlled between 150-200 mm. The concrete pouring should be perpendicular to the main keel direction, and then poured on both sides, or poured from either end of the keel to the middle simultaneously. The ribbed beam part is vibrated by inserting the vibrator. The insertion type vibrator should be inserted quickly and pulled out slowly, the insertion points should be arranged in a plum blossom shape, and the operation should be carried out in sequence. The moving distance should be no more than 1.5 times the effective radius of the vibrator, and the vibrator should be inserted into the next layer of concrete by 5 cm to eliminate the joint between the two layers. The vibration time should be appropriate when the concrete surface appears floating slurry and no bubbles and sinking. The beam side and beam bottom parts should be vibrated to be dense, and the steel bars and embedded parts should not be touched during vibration. When the steel bars at the beam and column joints are dense, small-diameter vibrators should be used for vibration, and the vibration points should be increased. The concrete of the poured plate should be laid with a thickness slightly larger than the plate thickness, and after vibration, it should be leveled with a 1.5-4 m screed. If the box explodes during the vibration process, the formwork support under this part should be reinforced, and diagonal bars should be added to form a lattice column form, that is, several vertical bars are connected by diagonal bars from bottom to top on all four sides, and one diagonal bar is added at each step. The cast-in-place layer should be vibrated by a flat plate vibrator to determine the vibration density. When pouring hollow concrete, the concrete should be poured into the mold in two steps, that is, first pouring the concrete at the solid ribbed beam part, and inserting the small vibration rod into the concrete until the concrete overflow at the ribbed beam part; the second step is to pour the 150 mm thick composite layer on the hollow plate core mold. The concrete should be poured while observing and adjusting.

[0067] After the concrete pouring is completed, the concrete should be prevented from evaporating too early, and the early maintenance method of covering with plastic film should be used, and the concrete maintenance should be carried out according to the requirements of the "Concrete Structure Engineering Construction Quality Acceptance Specification" (GB 50204-2015), and the concrete should be covered and kept moist within 12 hours after pouring the beam and plate, and the maintenance time should be not less than 14 d.

[0068] Test block production: At least one sample should be taken for every 100 m3 of concrete with the same mixing proportion.

[0069] Dismantling of formwork and support: After the structure is maintained under the same conditions, the test block test piece and the strength test pressure report reach the specified requirements, and the plate bottom mold, beam, and column side mold are removed.

[0070] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A box-type ribbed floor slab, comprising a box-shaped core mold body, the core mold body being composed of a top plate (1), a bottom plate (2), and a side wall cylinder (3), characterized in that: The top surface of the top plate (1) is provided with a connecting seat (11), and the connecting seats (11) of adjacent core mold bodies are connected by steel bars (12); the connecting seat (11) is provided with a plurality of circumferentially distributed slots (13), the steel bars (12) are provided in the slots (13), the top surface of the connecting seat (11) is provided with an opening on the slots (13), the opening on the slots (13) is provided with a stop (131) to prevent the steel bars (12) from coming out, and the space of the slots (13) around the steel bars (12) is filled with cement mortar. The side of the connecting seat (11) is provided with a slot (13) side opening. The direction from the slot (13) side opening to the middle of the connecting seat (11) is the length direction of the slot (13). Several blocking grooves (132) dividing the slot (13) are provided on the slot (13) along the length direction of the slot (13). Functional components (14) are inserted into the blocking grooves (132). The functional components (14) are rubber pads or bricks used to abut the ends of the reinforcing bars (12). The bottom surface of the top plate (1) is provided with a fitting punch (15) for inserting the rubber pads.

2. The assembled box-type ribbed floor slab according to claim 1, characterized in that: The connecting seat (11) is provided with a snap-fit ​​seat (111) and a steel bar (112) in the middle. The steel bar (112) is provided with a bent part (113) at both ends. The snap-fit ​​seat (111) is provided with a groove (114). The top surface of the groove (114) is provided with an insertion interface (115). The bent part (113) at one end of the steel bar (112) enters the groove (114) through the insertion interface (115) and is snapped into the groove (114) after rotation. The bent part (113) at the other end of the steel bar (112) is connected to the cast-in-place steel mesh layer (5) provided above the core mold body.

3. The assembled box-type ribbed floor slab according to claim 1, characterized in that: The base plate (2) is provided with an outwardly extending anchor bar (21), the end of the anchor bar (21) is provided with a bent part (211), the middle of the base plate (2) is provided with a drainage hole, and the lower edge of the outer periphery of the base plate (2) is provided with several shear grooves (22).

4. The assembled box-type ribbed floor slab according to claim 1, characterized in that: The bottom surface of the base plate (2) is provided with a sealing ring along the circumferential direction.

5. The assembled box-type ribbed floor slab according to claim 1, characterized in that: The inner side of the base plate (2) is provided with several hoisting connectors (23). The hoisting connectors (23) include two opposing columns, and a steel bar segment is connected between the two columns.

6. The assembled box-type ribbed floor slab according to claim 1, characterized in that: The sidewall tube (3) is a rectangular structure formed by four walls, with a positioning rope (31) connecting the two opposite inner walls.

7. The assembled box-type ribbed floor slab according to claim 6, characterized in that: The upper and lower sides of the sidewall cylinder (3) are respectively provided with flanges (32), and a stop bar (33) is fixed between the upper and lower flanges (32). The positioning rope (31) passes through the stop bar (33) and is connected to a clamping member (34). A spring (35) is provided between the clamping member (34) and the stop bar (33). The outer wall surface of the sidewall cylinder (3) is provided with a waterproof membrane layer (4), and the positioning rope (31) is provided with a time-delay extension section in the middle.

8. The assembled box-type ribbed floor slab according to claim 7, characterized in that: The time-delay extension section is provided with a sealing cylinder (36). Inside the sealing cylinder (36) are a left piston (361) and a right piston (362) that can slide along the length of the sealing cylinder (36). The left piston (361) is connected to the right section of the positioning rope (31), and the right piston (362) is connected to the left section of the positioning rope (31). A sealing chamber (363) is provided between the left piston (361) and the right piston (362). The sealing cylinder (36) in the middle of the sealing chamber (363) is provided with an inflation valve port (364) and an exhaust valve port (365). A sealing screw (366) is threadedly connected to the exhaust valve port (365). A miniature air outlet channel is provided between the sealing screw (366) and the exhaust valve port (365).

9. The assembled box-type ribbed floor slab according to claim 8, characterized in that: The threaded section of the sealing screw (366) is provided with a tape ring (367).

10. A construction method for a prefabricated box-type ribbed floor slab as described in claim 1, characterized in that, Includes the following steps: Construction preparation: Conduct incoming quality inspection on the precast components of the assembly box, including the top plate (1), bottom plate (2), and side wall cylinder (3) of the core mold body, and check the wall or mark the height and axis; hoisting of the assembly box components: place the short steel pipe at the bottom of the first top plate (1), insert the rubber pad into the blocking groove (132) on the top surface of the second top plate (1), and then stack the second top plate (1) with the top surface facing down with the first top plate (1), so that the rubber pad fits into the fitting punch (15) on the bottom surface of the first plate. When stacking the bottom plate (2), the bottom plate (2) is placed on the bottom. Place pads between the plates (2), stack multiple top plates (1) or bottom plates (2), and use lifting tools to hoist the steel pipes with lifting rings and lift them vertically to the stacking or construction position; lay the bottom plate (2) template: lay the bottom template all over the floor; mark the assembly box position line: on the bottom template that has been accepted, mark the rib beam edge line, i.e. the position line of the assembly box, according to the axis dimensions of the construction drawings, to ensure that the assembly box is accurately positioned; mark the position of the assembly box with red paint to prevent the box from being placed incorrectly; install the assembly box bottom plate (2): before laying the plates Check that all the bottom plates (2) have reserved drainage holes in the middle, and arrange the bottom plates (2) according to the box layout drawings and the assembly box position lines; Tie the rib beam reinforcement: Tie the rib beam reinforcement according to the requirements and specifications; Lay the conduit: including opening holes in the bottom plate (2) to install junction boxes, opening holes in the side wall cylinder (3) to install horizontal conduits, and reserving reserved openings for fire protection pipes and water supply and drainage pipes in the cast-in-place concrete layer above the top plate (1); Install the assembly box side wall cylinder (3): Install the assembly box side wall on the bottom plate (2) of the assembly box; Install the assembly box top plate (1): According to the box layout drawings, the top plate (1) is installed, and steel bars (12) are inserted into the slots (13) of the connecting seats (11) of each top plate (1) to connect the core mold bodies. Then, according to the rib beam width requirements, bricks are inserted into the blocking grooves (132) so that the bricks abut against the steel bars (12). The rib beam width is checked according to the abutment situation to see if it meets the construction requirements. Then, cement mortar is filled into the slots (13). Concrete pouring: After the rib beam steel bars and the concrete steel mesh layer above the top plate (1) are tied, concrete is poured.

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