A kind of formwork for in-site pouring concrete
(1) technical field
The present invention relates to a kind of formwork for in-site pouring concrete.
(2) background technology
Building roof of reinforcing bar concrete in the construction work has prefabricated porous plate or forms such as solid roof panel shaped structures and dense rib type floor slab structure.Prefabricated porous plate, solid roof panel are from great, and construction bothers, and labour intensity is big, and the cost height is used and is subjected to certain limitation.And the dense rib type floor, normally utilize detachable full-plastic formwork to carry out the concrete cast, treat again formwork to be removed behind the concrete coagulation forming, though the floor slab structure of moulding can alleviate deadweight like this, but also have the following disadvantages: 1, influence the floor processability behind the form removal, easily produce slight crack as floor top, the following of plate is not complete plane, and globality is poor; 2, need in some occasions that furred ceiling remedies, operation is many, troublesome poeration, cycle are long, take a lot of trouble during construction cost; 3, construction costs height uses though formwork is pulled down turnover, and each every depreciation cost reaches more than 120 yuan, and can only use 4-6 time; 4, indoor roof needs furred ceiling again, plasters etc., and it is bigger to pay wages.For this reason, Tianjin understand a kind of " shuttering member " in few grey hair, and applied for utility model patent, its patent No. is ZL93206310.1.This kind shuttering member comprise top board, on every side sidewall, go to the bottom, ribs, top board, on every side sidewall, going to the bottom surrounds cavity each other, ribs is positioned at cavity, and adopts GRC or magnesium chloride GRC or do not have the manufacturing of sand ﹠ ceramsite cement.The mechanical property of this member can satisfy the designing requirement of various buildings, and unit weight descends significantly, need not the form removal member, and globality is strong, simplifies construction sequence, and is fast without furred ceiling, construction speed, reduces construction costs, and economic benefit is obvious.Can overcome the deficiency of conventional art preferably.But when this shuttering member was big, weight was heavier relatively, and carrying, construction be trouble, and after the use, year is prone to the crack between Cast-in-place concrete rib and the formwork for a long time.Therefore, develop a kind of novel formwork for in-site pouring concrete for being badly in need of.
(3) summary of the invention
The object of the present invention is to provide a kind of formwork for in-site pouring concrete, have in light weight, carrying, easy construction, can prevent the characteristics such as crack between Cast-in-place concrete rib and the formwork.
Solution of the present invention be comprise top board, on every side side plate, go to the bottom, cavity, stiffener, top board, on every side side plate, going to the bottom surrounds cavity each other, stiffener is positioned at cavity, it is characterized in that top board, on every side side plate, go to the bottom or stiffener at least one in wrap up in and contain at least one light-weight filler.Since top board, on every side side plate, go to the bottom or stiffener at least one in wrap up in and contain at least one light-weight filler, thereby the weight of shuttering member is lighter relatively, the carrying easy construction, simultaneously because weight saving, the corresponding crack that prevents between Cast-in-place concrete rib and the formwork, formwork also has intensity height, simple in structure, easy to manufacture, characteristics such as cost is low in addition, is applicable to the various superstructures of construction work, also is applicable to space structures such as railway, bridge simultaneously.
Feature of the present invention is that also at least two light-weight fillers are provided with at interval in stiffener, each other be spaced apart skeleton more than at least one.Like this, owing to the skeleton that is spaced apart between the light-weight filler in the stiffener, not only stiffener is in light weight, its intensity height of while, and moulding is also convenient.
Feature of the present invention also is many skeletons parallel or handing-over or intersection or the grade separation in the stiffener, constitutes truss or netted stiffener.Like this, because skeleton constitutes truss or netted stiffener, thereby form strength and rigidity are big, and stressed transmission force property is good.
Feature of the present invention also is to have in the stiffener the dull and stereotyped or concavo-convex panel of the one deck at least that links load bearing frame.Like this, the intensity and the rigidity of stiffener further improve, and the stressed transmission force property of formwork is better.
That feature of the present invention also is is porose in the stiffener, hole or cavity, and hole, hole or cavity are in communication with the outside or seal.Like this, because hollow hole or cavity are arranged, then the weight of shuttering member is lighter, and the carrying construction is more convenient.Cast-in-place concrete can enter in it if hole, hole or cavity are in communication with the outside then, and then the build-in of formwork is better, and stressed transmission force property is better, can prevent the crack between Cast-in-place concrete rib and the formwork effectively.
Feature of the present invention also be top board, on every side side plate, go to the bottom or stiffener at least one in contain reinforce, reinforce is reinforcing bar, prestressed reinforcement, compressor wire, steel wire, gauze wire cloth, steel mesh reinforcement, expanded metal lath, pressure hole steel plate, fiber, fiber mesh cloth, steel fibre, nonwoven, braid over braid, strap, band steel, glass cloth, bundle or above-mentioned combination.Like this, the intensity and the rigidity of shuttering member are higher, and stressed transmission force property is better.
Reinforce in feature of the present invention also is reinforce to be arranged and go to the bottom in hole, hole or the cavity that stiffener is in communication with the outside is connected as one.Like this, the globality that becomes one with the formwork build-in after Cast-in-place concrete enters in hole or the cavity is better, and stressed transmission force property is better.
Feature of the present invention also be top board, on every side side plate, go to the bottom or stiffener at least one in have and reveal muscle or reveal net or the muscle of revealing is arranged simultaneously and reveal net.Like this, reveal muscle or reveal net owing to have, formwork bonds with Cast-in-place concrete becomes integral body, and its caking property, globality are better, can prevent the generation in crack effectively.
Feature of the present invention also be at position, stiffener place along top board or on every side side plate or both make part or all groove or convex tendon simultaneously, groove is the equal-width groove or the groove that broadens, convex tendon is the wide muscle or the muscle that broadens, and the muscle of revealing is perhaps arranged simultaneously and reveal net.Like this, the wedge action each other between formwork and the Cast-in-place concrete is better, and intensity is higher.
Feature of the present invention also is stiffener from top board, local or all protrude the side plate on every side, perhaps simultaneously from top board and local or whole protrusion the side plate on every side.Like this, increase the wedge action between formwork and the Cast-in-place concrete on the one hand, it is easier, convenient that formwork is made.
Feature of the present invention is that also stiffener is provided with a slice at least in cavity, is provided with that direction is parallel each other, quadrature or oblique.Like this, the making of stiffener can design and produce according to actual needs, and cost is lower, and it is easier to make, and stress performance is better.
Feature of the present invention also is to go to the bottom and flushes with the lateral surface of side plate on every side or stretch out the formation bridging piece, or interior puncture angle, stretch out or in the part that contracts for local or all, perhaps bridging piece has chamfering or is step, perhaps reveal muscle simultaneously in addition or reveal net or their combination.Like this, go to the bottom and stretch out bridging piece, then can omit the support shuttering of Cast-in-place concrete rib, save operating expenses; If interior puncture angle then can form I-shaped Cast-in-place concrete rib, its stress performance is better, can effectively prevent the generation in crack simultaneously.
Feature of the present invention also be top board, on every side side plate, go to the bottom or stiffener at least one on reinforcing rib is arranged.Like this, the intensity and the rigidity of shuttering member are better, and is stressed better with transmission force property.
The tension locating structure that connects a module is arranged on feature of the present invention also is to go to the bottom, and locating structure is draw ring, drag hook, iron wire or other device.Like this, formwork is in work progress, and installing and locating is more convenient.
Feature of the present invention is also at the cavity inside branch or all fills or be pasted with the lightweight thing that the lightweight thing is foamed plastics, expanded perlite, expanded vermiculite, foaming or aerated light concrete, rock wool, mineral wool or glass wool.Like this, the thermal insulation of shuttering member, sound insulation value are better.
Feature of the present invention is that also formwork is provided with the sleeve pipe of wearing the muscle hole or wearing hydroelectric line.Like this, can make things convenient for the burial and construction of various pipelines.
Feature of the present invention also be top board, on every side side plate, go to the bottom or stiffener at least one be layer structure more than at least two layers, by one deck cementitious matter one deck cloth or net, one deck cementitious matter one deck cloth or net again, the superimposed gluing of one deck cementitious matter forms again.Like this, formwork is lighter, and intensity is better, makes more convenient.
Feature of the present invention is that also stiffener is a rod member, the cross sectional shape of rod member be circle, annular, square, prolate type, hollow, ring is hollow, L shaped, flute profile, I-shaped, honeycomb hollow, porous shape, variable cross-section shape, perhaps simultaneously also along the axis reducing of rod member, perhaps hollow section is in communication with the outside simultaneously, or also has reinforcing bar or steel wire or gauze wire cloth or their combination in the hollow section simultaneously.Like this, stiffener is a rod member, thereby weight is lighter, and it is easier to produce, and cost is lower.
Feature of the present invention also is to have at least two by top board and the formwork that surrounds of side plate on every side on going to the bottom.Like this, formwork can do more, and cost is lower, and it is more convenient to construct.
Feature of the present invention also is to have the module of at least one protrusion on side plate around at least one.Like this, be applied to close rib building roof after, the weight of Cast-in-place concrete rib is further alleviated, save raw material, reduce construction cost.
Feature of the present invention is that also the appearance and size of formwork is ascending gradually changing, and the thick relative appearance and size of the thickness of slab that it is gone to the bottom or the rib of stiffener carries out the transition to the other end from large to small gradually.Like this, when this kind formwork is applied near the position of beam, wall, post, can effectively improve the thickness of reckoning the actual amount after a discount of concrete, corresponding intensity and the rigidity of drawing high superstructure.
(4) description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1.In each accompanying drawing, 1 is top board, 2 be around side plate, 3 for going to the bottom, 4 is cavity, 5 is stiffener, 6 is light-weight filler, numbers identically, its explanation is identical.In Fig. 1, at stiffener 5 with go to the bottom to wrap up in 3 and contain light-weight filler 6.
Fig. 2 is the structural representation of the embodiment of the invention 2, and light-weight filler 6 is provided with at interval in stiffener 5, each other be spaced apart skeleton 7.
Fig. 3 is the structural representation of the embodiment of the invention 3, and the skeleton 7 in its stiffener 5 constitutes the netted stiffener of frame each other.
Fig. 4 is the structural representation of the embodiment of the invention 4, and the skeleton 7 in its stiffener 5 constitutes the truss-like stiffener each other.
Fig. 5 is the structural representation of the embodiment of the invention 5, and there is the flat board 8 that links the netted load bearing frame 7 of frame the both sides of its stiffener 5.
Fig. 6 is the structural representation of the embodiment of the invention 6, and there is the flat board 8 that links truss-like load bearing frame 7 both sides of its stiffener 5.
Fig. 7 is the structural representation of the embodiment of the invention 7, and the hole 9 that is in communication with the outside is arranged in its stiffener 5, after Cast-in-place concrete pours into, promptly forms skeleton 7, can with formwork well build-in form integral body.
Fig. 8 is the structural representation of the embodiment of the invention 8, and the hole 9 that is in communication with the outside is arranged in its stiffener 5, after Cast-in-place concrete pours into, promptly forms skeleton 7, can with formwork well build-in form integral body.
Fig. 9 is the structural representation of the embodiment of the invention 9, and the hole 9 that is in communication with the outside is arranged in its stiffener 5, after Cast-in-place concrete pours into, promptly forms skeleton 7, can with formwork well build-in form integral body.
Figure 10 is the structural representation of the embodiment of the invention 10, and the hole 9 that is in communication with the outside is arranged in its stiffener 5, after Cast-in-place concrete pours into, promptly forms skeleton 7, can with formwork well build-in form integral body.
Figure 11 is the structural representation of the embodiment of the invention 11, its top board 1, in the side plate 2 gauze wire cloth or fiber mesh cloth reinforce 10 is arranged on every side, and going to the bottom has steel mesh reinforcement or gauze wire cloth reinforce 10 in 3.
Figure 12 is the structural representation of the embodiment of the invention 12, its top board 1, in the side plate 2 gauze wire cloth or fiber mesh cloth reinforce 10 is arranged on every side, and going to the bottom has steel mesh reinforcement or gauze wire cloth reinforce 10 in 3.
Figure 13 is the structural representation of the embodiment of the invention 13, its top board 1, in the side plate 2 gauze wire cloth or fiber mesh cloth reinforce 10 is arranged on every side, and going to the bottom has steel mesh reinforcement or gauze wire cloth reinforce 10 in 3.
Figure 14 is the structural representation of the embodiment of the invention 14, its top board 1, in the side plate 2 gauze wire cloth or fiber mesh cloth reinforce 10 is arranged on every side, and going to the bottom has steel mesh reinforcement or gauze wire cloth reinforce 10 in 3.
Figure 15 is the structural representation of the embodiment of the invention 15, has reinforcing bar reinforce 10 and the steel mesh reinforcement reinforce 10 of going to the bottom in 3 to be connected as one in its hole 9.
Figure 16 is the structural representation of the embodiment of the invention 16, and it is gone to the bottom the muscle 11 of revealing on 3.
Figure 17 is the structural representation of the embodiment of the invention 17, and it is gone to the bottom the net 12 of revealing on 3.
Figure 18 is the structural representation of the embodiment of the invention 18, at position, stiffener 5 place along top board 1 and on every side side plate 2 made whole grooves 13.
Figure 19 is the structural representation of the embodiment of the invention 19, and convex tendon 14 is arranged on top board 1, in the side plate 2 partial groove 13 is arranged on every side.
Figure 20 is the structural representation of the embodiment of the invention 20, and its stiffener 5 all protrudes from top board 1.
Figure 21 is the structural representation of the embodiment of the invention 21, and it is gone to the bottom and 3 stretches out on every side side plate 2 and constitute bridging pieces 15, and the muscle 11 of revealing is arranged simultaneously.
Figure 22 is the structural representation of the embodiment of the invention 22, its go to the bottom 3 in the side plate on every side 2 puncture angles 16, and the net 12 of revealing is arranged.
Figure 23 is the structural representation of the embodiment of the invention 23, and its top board 1, going to the bottom is provided with reinforcing rib 17 on 3.
Figure 24 is the structural representation of the embodiment of the invention 24, and it is gone to the bottom drag hook type tension locating structure 18 on 3.
Figure 25 is the structural representation of the embodiment of the invention 25, and it is gone to the bottom draw-ring type tension locating structure 18 on 3.
Figure 26 is the structural representation of the embodiment of the invention 26, all is filled with foamed plastics lightweight thing 19 in its cavity 4.
Figure 27 is the structural representation of the embodiment of the invention 27, and formwork is provided with wears muscle hole 20 and sleeve pipe 21.
Figure 28 is the structural representation of the embodiment of the invention 28, and it is gone to the bottom 3 is three layers layer structure.
Figure 29 is the structural representation of the embodiment of the invention 29, and the hollow section of its stiffener 5 for being in communication with the outside has reinforcing bar reinforce 10 simultaneously in it.
Figure 30 is the structural representation of the embodiment of the invention 30, and it is gone to the bottom and 3 is provided with 3 by top board 1 and the formwork 22 that surrounds of side plate 2 on every side.
Figure 31 is the structural representation of the embodiment of the invention 31, has the module 23 of 8 protrusions around it on the side plate 2.
Figure 32 is the structural representation of the embodiment of the invention 32, and the appearance and size of its formwork is from left to right ascending to gradually change, and it goes to the bottom 3 the relative appearance and size of thickness of slab from large to small, carries out the transition to the other end gradually.
(5) specific embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
The present invention as shown in drawings, comprise top board 1, on every side side plate 2, go to the bottom 3, cavity 4, stiffener 5, top board 1, on every side side plate 2, going to the bottom 3 surrounds cavity 4 each other, stiffener 5 is positioned at cavity 4, it is characterized in that top board 1, on every side side plate 2, go to the bottom 3 or stiffener 5 at least one in wrap up in and contain at least one light-weight filler 6.Fig. 1 is the structural representation of the embodiment of the invention 1.In each accompanying drawing, 1 is top board, 2 be around side plate, 3 for going to the bottom, 4 is cavity, 5 is stiffener, 6 is light-weight filler, numbers identically, its explanation is identical.In Fig. 1, at stiffener 5 with go to the bottom to wrap up in 3 and contain light-weight filler 6.
Feature of the present invention is that also at least two light-weight fillers 6 are provided with at interval in stiffener 5, each other be spaced apart skeleton 7 more than at least one.Fig. 2 is the structural representation of the embodiment of the invention 2, and light-weight filler 6 is provided with at interval in stiffener 5, each other be spaced apart skeleton 7.
Feature of the present invention also is many skeletons 7 parallel or handing-over or intersection or the grade separations in the stiffener 5, constitutes truss or netted stiffener.Fig. 3 is the structural representation of the embodiment of the invention 3, and the skeleton 7 in its stiffener 5 constitutes the netted stiffener of frame each other.Fig. 4 is the structural representation of the embodiment of the invention 4, and the skeleton 7 in its stiffener 5 constitutes the truss-like stiffener each other.
Feature of the present invention also is to have in the stiffener 5 dull and stereotyped the or concavo-convex panel 8 of the one deck at least that links load bearing frame 7.Fig. 5 is the structural representation of the embodiment of the invention 5, and there is the flat board 8 that links the netted load bearing frame 7 of frame the both sides of its stiffener 5.Fig. 6 is the structural representation of the embodiment of the invention 6, and there is the flat board 8 that links truss-like load bearing frame 7 both sides of its stiffener 5.
That feature of the present invention also is is porose in the stiffener 5, hole or cavity 9, and hole, hole or cavity 9 are in communication with the outside or seal.Fig. 7 is the structural representation of the embodiment of the invention 7, and the hole 9 that is in communication with the outside is arranged in its stiffener 5, after Cast-in-place concrete pours into, promptly forms skeleton 7, can with formwork well build-in form integral body.Fig. 8 is the structural representation of the embodiment of the invention 8, and the hole 9 that is in communication with the outside is arranged in its stiffener 5, after Cast-in-place concrete pours into, promptly forms skeleton 7, can with formwork well build-in form integral body.Fig. 9 is the structural representation of the embodiment of the invention 9, and the hole 9 that is in communication with the outside is arranged in its stiffener 5, after Cast-in-place concrete pours into, promptly forms skeleton 7, can with formwork well build-in form integral body.Figure 10 is the structural representation of the embodiment of the invention 10, and the hole 9 that is in communication with the outside is arranged in its stiffener 5, after Cast-in-place concrete pours into, promptly forms skeleton 7, can with formwork well build-in form integral body.
Feature of the present invention also be top board 1, on every side side plate 2, go to the bottom 3 or stiffener 5 at least one in contain reinforce 10, reinforce 10 is reinforcing bar, prestressed reinforcement, compressor wire, steel wire, gauze wire cloth, steel mesh reinforcement, expanded metal lath, pressure hole steel plate, fiber, fiber mesh cloth, steel fibre, nonwoven, braid over braid, strap, band steel, glass cloth, bundle or above-mentioned combination.Figure 11 is the structural representation of the embodiment of the invention 11, its top board 1, in the side plate 2 gauze wire cloth or fiber mesh cloth reinforce 10 is arranged on every side, and going to the bottom has steel mesh reinforcement or gauze wire cloth reinforce 10 in 3.Figure 12 is the structural representation of the embodiment of the invention 12, its top board 1, in the side plate 2 gauze wire cloth or fiber mesh cloth reinforce 10 is arranged on every side, and going to the bottom has steel mesh reinforcement or gauze wire cloth reinforce 10 in 3.Figure 13 is the structural representation of the embodiment of the invention 13, its top board 1, in the side plate 2 gauze wire cloth or fiber mesh cloth reinforce 10 is arranged on every side, and going to the bottom has steel mesh reinforcement or gauze wire cloth reinforce 10 in 3.Figure 14 is the structural representation of the embodiment of the invention 14, its top board 1, in the side plate 2 gauze wire cloth or fiber mesh cloth reinforce 10 is arranged on every side, and going to the bottom has steel mesh reinforcement or gauze wire cloth reinforce 10 in 3.
Feature of the present invention also is to have in hole, hole or the cavity 9 that stiffener 5 is in communication with the outside reinforce 10 and the reinforce 10 of going to the bottom in 3 to be connected as one.Figure 15 is the structural representation of the embodiment of the invention 15, has reinforcing bar reinforce 10 and the steel mesh reinforcement reinforce 10 of going to the bottom in 3 to be connected as one in its hole 9.
Feature of the present invention also be top board 1, on every side side plate 2, go to the bottom 3 or stiffener 5 at least one in have and reveal muscle 11 or reveal net 12 or the muscle 11 of revealing is arranged simultaneously and reveal net 12.Figure 16 is the structural representation of the embodiment of the invention 16, and it is gone to the bottom the muscle 11 of revealing on 3.Figure 17 is the structural representation of the embodiment of the invention 17, and it is gone to the bottom the net 12 of revealing on 3.
Feature of the present invention also is at position, stiffener 5 place along top board 1 or side plate 2 or both make part or all groove 13 or convex tendon 14 simultaneously on every side, groove 13 is the equal-width groove or the groove that broadens, convex tendon 14 is the wide muscle or the muscle that broadens, and the muscle of revealing 11 is perhaps arranged simultaneously and reveal net 12.Figure 18 is the structural representation of the embodiment of the invention 18, at position, stiffener 5 place along top board 1 and on every side side plate 2 made whole grooves 13.Figure 19 is the structural representation of the embodiment of the invention 19, and convex tendon 14 is arranged on top board 1, in the side plate 2 partial groove 13 is arranged on every side.
Feature of the present invention also is stiffener 5 from top board 1, local or all protrude the side plate 2 on every side, perhaps simultaneously from top board 1 and local or whole protrusion the side plate 2 on every side.Figure 20 is the structural representation of the embodiment of the invention 20, and its stiffener 5 all protrudes from top board 1.
Feature of the present invention is that also stiffener 5 is provided with a slice at least in cavity 4, is provided with that direction is parallel each other, quadrature or oblique.Fig. 1 to Figure 20 has the 5 quadrature settings of two stiffeners in the cavity 4.
Feature of the present invention also is to go to the bottom and 3 flushes or stretch out with the lateral surface of side plate 2 on every side and constitute bridging piece 15, or interior puncture angle 16, stretch out or in the part that contracts for local or all, perhaps bridging piece 15 has chamfering or is step, perhaps reveal muscle 11 simultaneously in addition or reveal net 12 or their combination.Figure 21 is the structural representation of the embodiment of the invention 21, and it is gone to the bottom and 3 stretches out on every side side plate 2 and constitute bridging pieces 15, and the muscle 11 of revealing is arranged simultaneously.Figure 22 is the structural representation of the embodiment of the invention 22, its go to the bottom 3 in the side plate on every side 2 puncture angles 16, and the net 12 of revealing is arranged.
Feature of the present invention also be top board 1, on every side side plate 2, go to the bottom 3 or stiffener 5 at least one on reinforcing rib 17 is arranged.Figure 23 is the structural representation of the embodiment of the invention 23, and its top board 1, going to the bottom is provided with reinforcing rib 17 on 3.
Feature of the present invention also is to go to the bottom has the tension locating structure 18 that connects a module on 3, and locating structure 18 is draw ring, drag hook, iron wire or other device.Figure 24 is the structural representation of the embodiment of the invention 24, and it is gone to the bottom drag hook type tension locating structure 18 on 3.Figure 25 is the structural representation of the embodiment of the invention 25, and it is gone to the bottom draw-ring type tension locating structure 18 on 3.
Feature of the present invention also is partly or entirely to fill or be pasted with lightweight thing 19 in cavity 4, lightweight thing 19 is foamed plastics, expanded perlite, expanded vermiculite, foaming or aerated light concrete, rock wool, mineral wool or glass wool.Figure 26 is the structural representation of the embodiment of the invention 26, all is filled with foamed plastics lightweight thing 19 in its cavity 4.
Feature of the present invention is that also formwork is provided with the sleeve pipe 21 of wearing muscle hole 20 or wearing hydroelectric line.Figure 27 is the structural representation of the embodiment of the invention 27, and formwork is provided with wears muscle hole 20 and sleeve pipe 21.
Feature of the present invention also be top board 1, on every side side plate 2, go to the bottom 3 or stiffener 5 at least one be layer structure more than at least two layers, by one deck cementitious matter one deck cloth or net, one deck cementitious matter one deck cloth or net again, the superimposed gluing of one deck cementitious matter forms again.Figure 28 is the structural representation of the embodiment of the invention 28, and it is gone to the bottom 3 is three layers layer structure.
Feature of the present invention is that also stiffener 5 is rod member, the cross sectional shape of rod member be circle, annular, square, prolate type, hollow, ring is hollow, L shaped, flute profile, I-shaped, honeycomb hollow, porous shape, variable cross-section shape, perhaps simultaneously also along the axis reducing of rod member, perhaps hollow section is in communication with the outside simultaneously, or also has reinforcing bar or steel wire or gauze wire cloth or their combination in the hollow section simultaneously.Figure 29 is the structural representation of the embodiment of the invention 29, and the hollow section of its stiffener 5 for being in communication with the outside has reinforcing bar reinforce 10 simultaneously in it.
Feature of the present invention also is there are at least two on 3 by top board 1 and the formwork 22 that surrounds of side plate 2 on every side going to the bottom.Figure 30 is the structural representation of the embodiment of the invention 30, and it is gone to the bottom and 3 is provided with 3 by top board 1 and the formwork 22 that surrounds of side plate 2 on every side.
Feature of the present invention also is to have the module 23 of at least one protrusion on side plate 2 around at least one.Figure 31 is the structural representation of the embodiment of the invention 31, has the module 23 of 8 protrusions around it on the side plate 2.
Feature of the present invention is that also the appearance and size of formwork is ascending gradually changing, and the thick relative appearance and size of rib of its go to the bottom 3 thickness of slab or stiffener 5 carries out the transition to the other end from large to small gradually.Figure 32 is the structural representation of the embodiment of the invention 32, and the appearance and size of its formwork is from left to right ascending to gradually change, and it goes to the bottom 3 the relative appearance and size of thickness of slab from large to small, carries out the transition to the other end gradually.
During the invention process, can make the stiffener 5 that contains light-weight filler 6 earlier, make formwork 22 again, when formwork 22 is dried, stiffener 5 is not bonded as one with it, make steel bar concrete then and go to the bottom 3, when not dried, binding is had the formwork 22 of stiffener 5 to link again and be one, behind the setting and harden, the maintenance moulding promptly forms whole formwork.