CN102031870A - Foaming material filling box with reinforced layer and slurry leakage hole - Google Patents
Foaming material filling box with reinforced layer and slurry leakage hole Download PDFInfo
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- CN102031870A CN102031870A CN 201010554837 CN201010554837A CN102031870A CN 102031870 A CN102031870 A CN 102031870A CN 201010554837 CN201010554837 CN 201010554837 CN 201010554837 A CN201010554837 A CN 201010554837A CN 102031870 A CN102031870 A CN 102031870A
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Abstract
The invention relates to a foaming material filling box with a reinforced layer and a slurry leakage hole and a manufacturing method thereof, belonging to the field of building construction. A main material of a body (2) of the filling box (1) is a light weight foaming material, the plane shape of the filling box (1) is rectangular, and the ratio of a long side to a short side is not more than 2; the upper surface of the body (2) is provided with the hard reinforced layer (3), the outer surface of the body is provided with an isolation layer (4); the hard reinforced layer (3) is located between the body (2) and the isolation layer (4); tangential angles or arc chamfers (5) are arranged at the peripheries of the upper surface and the lower surface of the filling box (1); and the middle part of the filling box (1) is provided with the vertical slurry leakage hole (6), the upper end of the slurry leakage hole (6) is in a big end up funnel shape, and the lower end of the slurry leakage hole (6) is in a big end down inverse funnel shape. In the invention, the sectional shape of the filling box meets the mechanical requirement, and the filling box is very convenient for production, transportation and installation, and has better structural reliability, shock resistance and crack resistance and favorable economical efficiency and applicability.
Description
(1) technical field
The present invention relates to the packing material in a kind of reinforced concrete hollow floor structure, especially a kind of expanded material aeration tank with enhancement Layer and spillage hole and preparation method thereof belongs to buildings in general structure field.
(2) background technology
At building field, along with the large-span concrete structure is increasing, increasing floor adopts the hollow building cover structure technology.Sometimes in order to reduce dead load or to strengthen concrete insulation, heat insulation, sound insulation, damping effect, need place some lightweight fillers in the concrete the inside.Come the instead of part concrete can not influence the stress performance of structure substantially with lightweight filler, but the deadweight that can alleviate structure greatly.
From the construction angle, when packing material is tubulose or bar-shaped time construction most convenient, concrete is built closely knit easily." concrete thin-wall cylindrical shell member " arranged, and (ZL98231113.3) " fibre reinforced hollow thin-wall tube for filling in bar reinforced concrete and manufacture method thereof " (ZL99115649.8) and " having the light porous material obturator that multiple cross sectional shape is used for concrete " early stage correlation technique such as (ZL02293406.5), but these technology all have certain limitation, bigger as ZL98231113.3 and the formed packing material deadweight of ZL99115649.8, and north of china in winter can't be in outdoor production; Mortar class separation layer intensity such as cement paste is lower in the obturator of ZL02293406.5, often need strengthen with reinforcing cage in the construction.I also once proposed " a kind of lightweight foam material filling member " with the hard enhancement Layer (ZL200420077923.9) and " a kind of pin-connected panel with a plurality of cavitys is filled pipe " (ZL200420077924.3).Though ZL200420077923.9 also has very high practical value, the convenient again suitability for industrialized production that realizes of ZL200420077924.3, but these two technology and foregoing technology all also belong to the category of filling pipe or filler rod, less with the hollow building cover hollow rate that these materials are filled, the macroeconomic type is relatively poor.
In hollow building cover, with the floor hollow rate maximum of casing filling, dead load is the lightest undoubtedly.In the prior art, " a kind of shuttering member " that Mr. Qiu Zeyou arranged preferably (ZL200310100971.5), " a kind of shuttering member " (ZL200310100972.X), " a kind of shuttering member " (ZL200310100969.8), " a kind of hollow component used for concrete " (ZL03118393.X), " a kind of hollow component used for concrete " (ZL03147388.1), " a kind of light carcass mould member for in-situ casting " (ZL03157893.4), " a kind of filling concrete in situ lightweight member " (ZL200310121942.7)." the filling thin-walled box of concrete floor system " that also have Cheng Wen Mr. Rang (ZL01245232.7), Mr.'s Wang Benmiao " thin wall box in-situ poured concrete hollow slab thin-wall box body " (ZL02282207.0), " casing (fillet) " (ZL200530117113.1) with " casing (right angle) " (ZL200530117112.7) etc.
In these technology, as: ZL200310100972.X, ZL03118393.X, ZL03147388.1, ZL200310100969.8, ZL03157893.4, the filling box section configuration mostly is the rectangular enclosure member greatly, is unfavorable for eliminating the stress concentration phenomenon of hollowcore slab inner corner portion.ZL200310100971.5, ZL200310121942.7 have chamfering, ZL01245232.7 box body basic configuration is the housing of cuboid, its end face is outer convex surface, this concentrates very beneficial for the stress of eliminating hollow tile floor slab one side, but when this casing volume was too big, the concrete of bottom half was not easy closely knit.The thin-wall box body of ZL02282207.0 is a tabular, seal with top, bottom panel by perisporium, at the casing axis of centres to hollow section is set, connect box top, bottom panel, the centre bore of hollow section runs through top, bottom panel, and concrete can be closely knit with the concreting below the casing by the hollow section centre bore.The progress of ZL02282207.0 is to have invented centre bore to solve the closely knit problem of concreting, but in the implementation process, because center-hole diameter less (usually less than 150mm) is relatively more difficult toward the interior concrete placing of centre bore; If center-hole diameter is increased, then cause the structure of hollow rate to reduce undoubtedly; Because this technology is primarily aimed at inorganic coagulation material (GRC class), because of the moulding process restriction, the filling box section configuration still is a rectangle, the phenomenon that casing and centre bore bight still exist stress to concentrate simultaneously.In ZL200530117113.1 and ZL200530117112.7, the upper and lower surface design of casing is become cambered surface, but this shape still is suitable for GRC class material.And the outstanding shortcoming of GRC class filling box is: pipeline installation inconvenience in big, the easy breakage of material deadweight, the superstructure.
In above-mentioned numerous technology, different shortcomings is arranged respectively, in this case, develop a kind of lightweight foam material that is applicable to, stressed rationally, easy construction be used for the product that concrete is filled, become urgent problem in the current hollow building cover.
(3) summary of the invention
In the prior art, have that the hollow building cover hollow rate is low, structure stress is unreasonable, the packing material cost is higher or problem such as construction inconvenience, the object of the present invention is to provide a kind of expanded material filling box with enhancement Layer and spillage hole, this filling box cross sectional shape is relatively more perfect, can eliminate packing material stress concentration phenomenon on every side as far as possible, under the prerequisite that guarantees structure stress, can improve the hollow rate of superstructure as much as possible, can guarantee concrete pouring quality again, this production, transportation and installation simultaneously is all very convenient, and the anti shock and vibration performance is good.
On the basis of existing technology, for achieving the above object, the technical solution used in the present invention is: a kind of expanded material filling box with enhancement Layer and spillage hole is provided, the body master material of filling box is a lightweight foam material, the flat shape of filling box is a rectangle, its long limit is less than or equal to 2 with the ratio of minor face size, at the upper surface of body flat shape being arranged is the hard enhancement Layer of annular, the external surface of body has separation layer, the hard enhancement Layer is between body and separation layer, there are corner cut or camber line chamfering in the upper and lower surface border of filling box, there is a vertical spillage hole at the middle part of filling box, the upper end in spillage hole is up big and down small infundibulate, and the lower end in spillage hole is the up-small and down-big infundibulate of falling.
The invention is characterized in that body is assembled up and down by two or more member units, each member unit by sidewall, face the wall and meditate and ribs constitutes, ribs position in the adjacent members unit is corresponding one by one and be close to mutually, at the middle part of member unit one hole is arranged, be connected by ribs between the sidewall of hole and the sidewall of border, sidewall, face the wall and meditate and ribs all is the heavy wall of thickness 〉=25mm.
The flat shape that the invention is characterized in the spillage hole is rectangle, polygon, circle, ellipse or composite figure.
The invention is characterized in that upper and lower side funnel section both sides, spillage hole are shaped as oblique line, stepped line, camber line or assemble line.
The invention is characterized in that body master material lightweight foam material is extruded sheet, polystyrene foam plastics, Vestolit, polyurethane foam plastics.
The invention is characterized in that hard enhancement Layer master material is cement mortar, hard plastic sheet, density board, pottery or the sheet metal of built-in grid cloth.
The invention is characterized in that separation layer master material is plastic adhesive tape, polyurethane coating, emulsion paint or elastic composite coating.
The preparation method of a kind of expanded material filling box with enhancement Layer and spillage hole of the present invention is: the body of producing lightweight foam material, corner cut or camber line chamfering are wanted in the upper and lower surface border of body, have a spillage hole at the middle part of body, the upper and lower side in spillage hole all is an infundibulate, at the upper surface of body the hard enhancement Layer is installed, the external surface of body is pasted or is smeared separation layer.
Body is assembled up and down by two or more member units in the preparation method of a kind of expanded material filling box with enhancement Layer and spillage hole of the present invention, each member unit by sidewall, face the wall and meditate and ribs constitutes, ribs position in the adjacent members unit is corresponding one by one and be close to mutually, at the middle part of member unit one hole is arranged, be connected by ribs between the sidewall of hole and the sidewall of border, sidewall, face the wall and meditate and ribs all is the heavy wall of thickness 〉=25mm.
After adopting such scheme, the present invention compared with prior art has following beneficial effect:
Engineering practice shows, the hollow building cover hollow rate maximum of filling with the casing of square-section, but in this structure, the phenomenon that the bight of casing has stress to concentrate, the concrete thickness that adds solid rib between the concrete on the upper and lower surface of upper box and casing has a sudden change, because the inhomogeneities of concrete shrinkage, the crack appears in plate surface concrete at these positions easily.Among the present invention corner cut or camber line chamfering are carried out in the upper and lower surface border of filling box, phenomenon concentrated, that abrupt changes in thickness do not occur on the one hand eliminates stress; Concrete on casing top is a dome shaped cover on the other hand, can strengthen the ability that flooring bears point load greatly, and the corner cut of lower box or chamfering can make things convenient for concrete building.The upper and lower surface of casing major part is plane but not outer convex surface, the one, make the hollow rate of superstructure big as far as possible, the 2nd, between the upper and lower surface of casing and steel bar stress, isolated material is installed during convenient construction, make between steel bar stress and the casing and can effectively isolate, guarantee the safety of structure.Open a vertical spillage hole at the filling box middle part, the upper end in spillage hole is up big and down small infundibulate, and the lower end in spillage hole is the up-small and down-big infundibulate of falling.The upper hopper in spillage hole can guarantee under spillage hole cross dimension is tried one's best little prerequisite, accelerates the speed that concrete flows into the spillage hole greatly; Following funnel can guarantee that then the coarse aggregate in the concrete can be rapidly and flow to the bottom of casing without barrier; Speed of application is accelerated in being arranged on of upper and lower funnel when guaranteeing concrete pouring quality.Behind the concrete formation, the concrete in the spillage hole, being equivalent to has increased a joint pin between the upper and lower surperficial concrete slab of casing, and the joint pin upper and lower side all is with enlarged footing, and its mechanical mechanism is identical with cap in the slab column system.So this spillage hole with upper and lower funnel, in floor use in future, the partial pressing and the anti-impact ability of cutting that increase flooring also are very helpful.In casing, adopt lightweight foam material, then widened the range of application of this material in hollow building cover, overcome the shortcoming of pipeline installation inconvenience in big, the easy breakage of traditional GRC class tank material deadweight, the superstructure.When producing with the mould compacting, in order to save material, body can be made into cavity structure, but because the intensity of lightweight foam material own is lower, the thin-walled box that is no more than 10mm as GRC class material wall thickness can't be produced, wall thickness 〉=25mm member unit can only be produced.In the adjacent members unit, the position of ribs is corresponding one by one and be close to, and ribs not only plays a part reinforced sidewall and faces the wall and meditates, and more plays a part external force is directly transmitted from top to bottom.A kind of expanded material filling box of the present invention with enhancement Layer and spillage hole, production, transportation and installation are all very convenient, and the anti shock and vibration performance is good.The hollow building cover span that forms with this product is big, in light weight, sound insulation, good heat-insulation effect, and reliability of structure, shock resistance, crack resistance are also better.The present invention has excellent economy and applicability, and the development of Building technology is played a driving role.
(4) description of drawings
The present invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is the vertical cross section organigram of filling box of the present invention.
Fig. 2 is a filling box vertical view of the present invention.
Fig. 3 is the member unit vertical cross section figure that forms body among the present invention.
Fig. 4 is a member unit horizontal sectional drawing of forming body among the present invention.
Fig. 5 is the flat shape schematic diagram in spillage hole among the present invention.
Fig. 6 is upper and lower side funnel section both sides, a spillage hole lines shape schematic diagram among the present invention.
Among the figure: 1. filling box, 2. body, 3. hard enhancement Layer, 4. separation layer, 5. corner cut or camber line chamfering, 6. spillage hole, 7. member unit, 8. sidewall is is 9. faced the wall and meditated, 10. ribs.
(5) specific embodiment
The present invention realizes in such a way:
At Fig. 1, in embodiment illustrated in fig. 2, the main material of body (2) of filling box (1) is a lightweight foam material, the flat shape of filling box (1) is a rectangle, its long limit is less than or equal to 2 with the ratio of minor face size, at the upper surface of body (2) flat shape being arranged is the hard enhancement Layer (3) of annular, the external surface of body has separation layer (4), hard enhancement Layer (3) is positioned between body (2) and the separation layer (4), there are corner cut or camber line chamfering (5) in the upper and lower surface border of filling box (1), there is a vertical spillage hole (6) at the middle part of filling box (1), the upper end in spillage hole (6) is up big and down small infundibulate, and the lower end of spillage hole (6) is the up-small and down-big infundibulate of falling.Because the intensity of lightweight foam material own is lower, and filling box bears bigger external force again in work progress, the upper surface of filling box is main stress surface, and the purpose that the hard enhancement Layer is set is exactly the intensity that strengthens body, satisfies construction requirement.The water absorption rate of lightweight foam material itself is all bigger usually, and the purpose that separation layer is set is exactly the moisture of avoiding in the bulk absorption concrete, causes concrete strength to reduce.
Fig. 3, embodiment illustrated in fig. 4 in, body (2) is assembled up and down by two or more member units (7), each member unit (7) by sidewall (8), face the wall and meditate (9) and ribs (10) constitutes, ribs (10) position in the adjacent members unit (7) is corresponding one by one and be close to mutually, one hole (10) is arranged at the middle part of member unit, be connected by ribs (10) between the sidewall of hole and the sidewall of border (8), sidewall (8), face the wall and meditate (9) and ribs (10) all is the heavy wall of thickness 〉=25mm.
Fig. 2, Fig. 4, embodiment illustrated in fig. 5 in, the flat shape of spillage hole (6) is rectangle, polygon, circle, ellipse or composite figure.
Fig. 1, Fig. 3, embodiment illustrated in fig. 6 in, upper and lower side funnel section both sides, spillage hole (6) lines are shaped as oblique line, stepped line, camber line or assemble line.
In the embodiment shown in fig. 1, the main material lightweight foam material of body (2) is extruded sheet, polystyrene foam plastics, Vestolit, polyurethane foam plastics.
In the embodiment shown in fig. 1, the main material of hard enhancement Layer (3) is cement mortar, hard plastic sheet, density board, pottery or the sheet metal of built-in grid cloth.
In the embodiment shown in fig. 1, the main material of separation layer (4) is plastic adhesive tape, polyurethane coating, emulsion paint or elastic composite coating.
In Fig. 1-embodiment illustrated in fig. 4, the preparation method of a kind of expanded material filling box with enhancement Layer and spillage hole of the present invention is: the body (2) of producing lightweight foam material, corner cut or camber line chamfering (5) are wanted in the upper and lower surface border of body, have a spillage hole (6) at the middle part of body, the upper and lower side in spillage hole all is an infundibulate, at the upper surface of body hard enhancement Layer (3) is installed, the external surface of body is pasted or is smeared separation layer (4).Body (2) is assembled up and down by two or more member units (7), each member unit (7) by sidewall (8), face the wall and meditate (9) and ribs (10) constitutes, ribs (10) position in the adjacent members unit (7) is corresponding one by one and be close to mutually, one hole (10) is arranged at the middle part of member unit, be connected by ribs (10) between the sidewall of hole and the sidewall of border (8), sidewall (8), face the wall and meditate (9) and ribs (10) all is the heavy wall of thickness 〉=25mm.
Claims (9)
1. expanded material filling box with enhancement Layer and spillage hole, the main material of body (2) of filling box (1) is a lightweight foam material, the flat shape of filling box (1) is a rectangle, its long limit is less than or equal to 2 with the ratio of minor face size, at the upper surface of body (2) flat shape being arranged is the hard enhancement Layer (3) of annular, the external surface of body has separation layer (4), hard enhancement Layer (3) is positioned between body (2) and the separation layer (4), there are corner cut or camber line chamfering (5) in the upper and lower surface border that it is characterized in that filling box (1), there is a vertical spillage hole (6) at the middle part of filling box (1), the upper end in spillage hole (6) is up big and down small infundibulate, and the lower end of spillage hole (6) is the up-small and down-big infundibulate of falling.
2. a kind of expanded material filling box according to claim 1 with enhancement Layer and spillage hole, it is characterized in that body (2) is assembled up and down by two or more member units (7), each member unit (7) is by sidewall (8), face the wall and meditate (9) and ribs (10) constitutes, ribs (10) position in the adjacent members unit (7) is corresponding one by one and be close to mutually, one hole (10) is arranged at the middle part of member unit, be connected sidewall (8) by ribs (10) between the sidewall of hole and the sidewall of border (8), face the wall and meditate (9) and ribs (10) all is the heavy wall of thickness 〉=25mm.
3. a kind of expanded material filling box with enhancement Layer and spillage hole according to claim 1, the flat shape that it is characterized in that spillage hole (6) is rectangle, polygon, circle, ellipse or composite figure.
4. a kind of expanded material filling box with enhancement Layer and spillage hole according to claim 1 is characterized in that upper and lower side funnel section both sides, spillage hole (6) are shaped as oblique line, stepped line, camber line or assemble line.
5. a kind of expanded material filling box with enhancement Layer and spillage hole according to claim 1 is characterized in that the main material lightweight foam material of body (2) is extruded sheet, polystyrene foam plastics, Vestolit, polyurethane foam plastics.
6. a kind of expanded material filling box with enhancement Layer and spillage hole according to claim 1 is characterized in that the main material of hard enhancement Layer (3) is cement mortar, hard plastic sheet, density board, pottery or the sheet metal of built-in grid cloth.
7. a kind of expanded material filling box with enhancement Layer and spillage hole according to claim 1 is characterized in that the main material of separation layer (4) is plastic adhesive tape, polyurethane coating, emulsion paint or elastic composite coating.
8. the preparation method of a kind of expanded material filling box with enhancement Layer and spillage hole according to claim 1, it is characterized in that: the body (2) of producing lightweight foam material, corner cut or camber line chamfering (5) are wanted in body upper and lower surface border, have a spillage hole (6) at the middle part of body, the upper and lower side in spillage hole all is an infundibulate, at the upper surface of body hard enhancement Layer (3) is installed, the external surface of body is pasted or is smeared separation layer (4).
9. the preparation method of a kind of expanded material filling box with enhancement Layer and spillage hole according to claim 1, it is characterized in that: body (2) is assembled up and down by two or more member units (7), each member unit (7) is by sidewall (8), face the wall and meditate (9) and ribs (10) constitutes, ribs (10) position in the adjacent members unit (7) is corresponding one by one and be close to mutually, one hole (10) is arranged at the middle part of member unit, be connected sidewall (8) by ribs (10) between the sidewall of hole and the sidewall of border (8), face the wall and meditate (9) and ribs (10) all is the heavy wall of thickness 〉=25mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010554837 CN102031870B (en) | 2010-11-23 | 2010-11-23 | Foaming material filling box with reinforced layer and slurry leakage hole |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010554837 CN102031870B (en) | 2010-11-23 | 2010-11-23 | Foaming material filling box with reinforced layer and slurry leakage hole |
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| CN102031870A true CN102031870A (en) | 2011-04-27 |
| CN102031870B CN102031870B (en) | 2013-02-20 |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103556767A (en) * | 2013-11-14 | 2014-02-05 | 佛山市班高得节能建工科技有限公司 | Lightweight solid-web type mandrel applied to cast-in-situ concrete hollow floor slab, and assembling method of mandrel |
| CN104164935A (en) * | 2014-08-27 | 2014-11-26 | 徐焱 | Foam material filling box with slurry leakage hole and slurry flowing groove |
| CN104453049A (en) * | 2014-11-26 | 2015-03-25 | 徐焱 | Hollow one-way plate with filling rods and filling boxes mixed for use |
| CN105220815A (en) * | 2015-10-23 | 2016-01-06 | 徐焱 | A kind of with bottom gas-permeable nets and the filling box of upper discharge hole |
| CN105220806A (en) * | 2015-10-19 | 2016-01-06 | 徐焱 | A kind of light material packing with wire lath surface layer |
| CN105239710A (en) * | 2015-11-02 | 2016-01-13 | 郭伍常 | Combined metal filling box with slurry blocking pieces |
| CN105239709A (en) * | 2015-11-02 | 2016-01-13 | 徐焱 | Permeable combined filling box formed by metal sheets |
| CN105239708A (en) * | 2015-10-19 | 2016-01-13 | 徐焱 | Light material filling box with metal net surface layer |
| CN105297981A (en) * | 2015-11-24 | 2016-02-03 | 徐焱 | Hollow floor filled by breathable box |
| CN105297980A (en) * | 2015-11-24 | 2016-02-03 | 徐焱 | Assembled breathable filling box |
| CN105484418A (en) * | 2016-01-11 | 2016-04-13 | 徐焱 | Vertical assembly type ventilation filling box |
| CN105484419A (en) * | 2016-01-11 | 2016-04-13 | 徐焱 | Ventilating plastic box |
| CN108532948A (en) * | 2018-04-10 | 2018-09-14 | 山东安泰克工程材料有限公司 | A kind of integral type mortar leakage prevention packing material |
| CN117286978A (en) * | 2023-11-24 | 2023-12-26 | 中铁二十二局集团轨道工程有限公司 | Construction process of prestressed hollow slab |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103556767B (en) * | 2013-11-14 | 2017-01-11 | 广东班高得绿色建工科技有限公司 | Assembling method of lightweight solid-web type mandrel applied to cast-in-situ concrete hollow floor slab |
| CN103556767A (en) * | 2013-11-14 | 2014-02-05 | 佛山市班高得节能建工科技有限公司 | Lightweight solid-web type mandrel applied to cast-in-situ concrete hollow floor slab, and assembling method of mandrel |
| CN104164935A (en) * | 2014-08-27 | 2014-11-26 | 徐焱 | Foam material filling box with slurry leakage hole and slurry flowing groove |
| CN104453049A (en) * | 2014-11-26 | 2015-03-25 | 徐焱 | Hollow one-way plate with filling rods and filling boxes mixed for use |
| CN104453049B (en) * | 2014-11-26 | 2017-05-17 | 徐焱 | Hollow one-way plate with filling rods and filling boxes mixed for use |
| CN105220806A (en) * | 2015-10-19 | 2016-01-06 | 徐焱 | A kind of light material packing with wire lath surface layer |
| CN105239708A (en) * | 2015-10-19 | 2016-01-13 | 徐焱 | Light material filling box with metal net surface layer |
| CN105220815A (en) * | 2015-10-23 | 2016-01-06 | 徐焱 | A kind of with bottom gas-permeable nets and the filling box of upper discharge hole |
| CN105220815B (en) * | 2015-10-23 | 2018-03-02 | 徐焱 | A kind of filling box with bottom gas-permeable nets and upper discharge hole |
| CN105239709A (en) * | 2015-11-02 | 2016-01-13 | 徐焱 | Permeable combined filling box formed by metal sheets |
| CN105239710A (en) * | 2015-11-02 | 2016-01-13 | 郭伍常 | Combined metal filling box with slurry blocking pieces |
| CN105297981A (en) * | 2015-11-24 | 2016-02-03 | 徐焱 | Hollow floor filled by breathable box |
| CN105297980A (en) * | 2015-11-24 | 2016-02-03 | 徐焱 | Assembled breathable filling box |
| CN105297981B (en) * | 2015-11-24 | 2017-10-20 | 徐焱 | A kind of hollow floor filled with ventilative case |
| CN105484418A (en) * | 2016-01-11 | 2016-04-13 | 徐焱 | Vertical assembly type ventilation filling box |
| CN105484419A (en) * | 2016-01-11 | 2016-04-13 | 徐焱 | Ventilating plastic box |
| CN108532948A (en) * | 2018-04-10 | 2018-09-14 | 山东安泰克工程材料有限公司 | A kind of integral type mortar leakage prevention packing material |
| CN117286978A (en) * | 2023-11-24 | 2023-12-26 | 中铁二十二局集团轨道工程有限公司 | Construction process of prestressed hollow slab |
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| CN102031870B (en) | 2013-02-20 |
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