CN1970933B - Cast-in-situ concrete hollow slab - Google Patents
Cast-in-situ concrete hollow slab Download PDFInfo
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- CN1970933B CN1970933B CN200610121951XA CN200610121951A CN1970933B CN 1970933 B CN1970933 B CN 1970933B CN 200610121951X A CN200610121951X A CN 200610121951XA CN 200610121951 A CN200610121951 A CN 200610121951A CN 1970933 B CN1970933 B CN 1970933B
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- Prior art keywords
- cast
- upper plate
- place concrete
- concrete cored
- shuttering member
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- 239000004567 concrete Substances 0.000 title claims abstract description 97
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 38
- 238000009416 shuttering Methods 0.000 claims abstract description 58
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 32
- 230000003014 reinforcing effect Effects 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 238000009415 formwork Methods 0.000 claims description 10
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 238000005267 amalgamation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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Abstract
Disclosed is a cast-in-situs concrete hollow slab, which comprises a reinforced-bar concrete (1) and shuttering members (2), the shuttering member (2) is enclosed in the reinforced-bar concrete (1), the shuttering members (2) are arranged alternatively, a cast-in-situ reinforced-bar concrete rib (3) is arranged between them, and a cast-in-situ reinforced concrete upper slab (4) is arranged above,a cast-in-situ reinforced concrete upper slab (5) is arranged below, the shuttering members (2) comprise an upper board (6) and ring form side panels, the upper board (6) and the ring form side panels (7) encloses an open basin shape component, characterized in that at least part of the upper boards (6) being movable upper board (52). As a result, the invention can be applied to cast-in-situ reinforced concrete or prestressed reinforcement concrete's hollow storied-building roofings, house roofings, walls, foundation bedplates and hollow bridges, especially for hollow flat slabs.
Description
(1) technical field
The present invention relates to a kind of cast-in-place concrete cored.
(2) background technology
The most of precast hollow slab that adopts of the building of brick mix structure and frame construction is as cast-in-place concrete cored plate at present, this cast-in-place concrete cored plate has advantages such as speed of application is fast, cost is low, but owing to firmly do not link between adjacent two precast hollow slabs, only use cement mortar blind, thereby not only globality is poor, be unfavorable for antidetonation, and phenomenons such as slit cracking, infiltration often occur, put to no little inconvenience and psychological pressure to resident family.In order to address the above problem, a lot of building have adopted the method for Cast-in-place concrete floor (hollow, solid).Though the Cast-in-place concrete floor has solved antidetonation and problems of crack, when construction, to use a large amount of templates, like this, not only increased expense, and the speed of application that slowed down, prolonged the duration.The patent No. is ZL00203695.9's " combination concrete hidden rib cast-in-place concrete cored plate " utility model patent, it is made up of prefabricated plate, formwork, dark rib, upper plate, each prefabricated plate is horizontal positioned at interval, on prefabricated plate, be fixed with formwork, formwork comprises upper plate and side plate on every side, be provided with dark rib between contiguous prefabricated thin plate or the formwork, upper plate covers on the formwork, and connect as one with dark rib, the cast-in-place concrete cored plate of this kind no longer needs to use in a large number template, accelerate speed of application, shortened the duration, thereby reduced cost.But, the lower shoe of this cast-in-place concrete cored plate is a prefabricated plate, has the amalgamation seam each other, and globality is poor, if lower shoe adopts the cast-in-situ reinforced concrete plate, though good integrity, the problem that does not exist amalgamation to stitch, construction is inconvenient, the Cast-in-place concrete leakiness, be prone to problems such as voids and pits, therefore, develop a kind of novel cast-in-place concrete cored for being badly in need of.
(3) summary of the invention
The object of the present invention is to provide a kind of cast-in-place concrete coredly, have good overall performance, and easy construction, construction cost is low, construction quality good.
Solution of the present invention is on the basis of existing technology, comprise steel bar concrete, shuttering member, shuttering member is wrapped up in and is contained in the steel bar concrete, shuttering member is the cast-in-situ reinforced concrete rib alternately each other, is the cast-in-situ reinforced concrete upper plate on it, it is the cast-in-situ reinforced concrete lower plate down, shuttering member comprises upper plate, annular sidewall, and upper plate, annular sidewall surround uncovered basin-shaped component, it is characterized in that described basin-shaped component to small part upper plate is a movable upper plate.Like this, when basin-shaped component to small part upper plate is a movable upper plate, described shuttering member is applied to Cast-in-place concrete to shuttering member and forms the Cast-in-place concrete thin plate down, and can shake the Cast-in-place concrete thin plate under it and smash, floating, compacting, and then after movable upper plate covered the upper plate skylight, build the cast-in-situ concrete structure on the sidewall and upper plate around the shuttering member, guaranteed the hollow rate of Cast-in-place concrete floor, be applicable to the hollow building cover of cast-in-situ reinforced concrete or prestressed reinforced concrete, roof system, body of wall, sole plate and hollow bridges are used, and are particularly useful for hollow arch without beam and use.
The present invention also is do not have the cast in place reinforced bar upper plate, the upper surface of upper plate and cast-in-place concrete cored upper surface flush on the upper plate of described shuttering member.Like this, when not having the cast in place reinforced bar upper plate on the upper plate of shuttering member, making the cast-in-place concrete cored top that formed is the two way ribbed slab of prefabricated plate, and whole compressive strength is good, has improved cast-in-place concrete cored supporting capacity.
The present invention is that also the bottom of described shuttering member does not have the cast-in-situ reinforced concrete lower plate.Like this, when the bottom of shuttering member does not have the cast-in-situ reinforced concrete lower plate, make the cast-in-place concrete cored open two way ribbed slab in bottom that formed, whole compressive strength is good, has improved cast-in-place concrete cored supporting capacity.
The present invention also is do not have the cast in place reinforced bar upper plate on the upper plate of described shuttering member, the upper surface of upper plate and cast-in-place concrete cored upper surface flush, and the bottom of shuttering member does not have the cast-in-situ reinforced concrete lower plate.Like this, when the upper plate of shuttering member on do not have the cast in place reinforced bar upper plate, the upper surface of upper plate and cast-in-place concrete cored upper surface flush, when the bottom of shuttering member does not have the cast-in-situ reinforced concrete lower plate, the cast-in-place concrete cored in-situ deposited prefabricated superimposed sheet of two-way rib structure that formed, reduce the consumption of Cast-in-place concrete significantly, reduced cast-in-place concrete cored deadweight, improved cast-in-place concrete cored supporting capacity.
Feature of the present invention is that also described basin-shaped component is provided with cross-arm, and below or movable upper plate that cross-arm is arranged at the movable upper plate behind the location directly are shelved on the cross-arm.Like this, cross-arm is movable upper plate positioning supports firmly, make its transportation, pile up and the installation application process in the displacement that is difficult for dropping, improved the firm performance of shuttering member, make it not fragile, make things convenient for application implementation.
Feature of the present invention is that also described cross-arm passes the formwork central axis.Like this, when cross-arm passes the formwork central axis, on horizontal on each shuttering member pinched and is positioned at same straight line or parallels to the axis, after having built Cast-in-place concrete, horizontal pinching can participate in the common power transmission of cast-in-situ concrete structure, make the cast-in-place concrete cored support reinforcing that is able in shuttering member upper plate position, improved intensity, rigidity and the supporting capacity of cast-in-place plate.
Feature of the present invention is that also described movable upper plate is shelved on annular sidewall and the cross-arm simultaneously.Like this, when movable upper plate was shelved on annular sidewall and the cross-arm simultaneously, annular sidewall and cross-arm supported simultaneously to movable upper plate, had increased substantially the stability of strutting system of movable upper plate, this supporting way makes movable upper plate more survivable, and annular sidewall and cross-arm have played two-way supporting role.
Feature of the present invention also is to have on the described annular sidewall horizontal vertical or oblique reinforcing rib.Like this, when horizontal vertical or oblique reinforcing rib is arranged on the annular sidewall, the strength and stiffness of annular sidewall have all obtained increasing substantially, make the shock resistance damage capability of shuttering member stronger, and the while has also been improved the whole anti-extrusion ability of shuttering member, makes shuttering member survivable, reduce loss, saved cost.
Feature of the present invention is that also there are angle brace bar or gusset in described annular sidewall corner.Like this, when there were angle brace bar or gusset in the annular sidewall corner, angle brace bar or gusset had played good support to adjacent wall and have drawn positioning action, made between the adjacent wall can not be subjected to displacement, and had improved the overall performance of shuttering member.
Feature of the present invention is that also described upper plate is made of two movable upper plates.Like this, upper plate is made of two movable upper plates, two movable upper plates are opened, can build shuttering member bottom Cast-in-place concrete thin plate very easily, working space is big, has made things convenient for construction, built lower plate after, behind the upper plate that movable upper plate amalgamation buckle closure formation closed die mould component is suitable for reading, build the Cast-in-place concrete of shuttering member sidewall and upper plate again and can live with the hollow rate that waters the concrete plate.
Feature of the present invention is that also described upper plate is made up of a upper plate that is fixed on sidewall and the movable upper plate of another piece.Like this, when upper plate was made up of a upper plate that is fixed on sidewall and the movable upper plate of another piece, the shuttering member production technology was simple, uses to make things convenient for, and can build shuttering member bottom Cast-in-place concrete thin plate very easily.
Feature of the present invention is that also described movable upper plate is movably connected in fixedly on the upper plate.Like this, easy to connect between movable upper plate and the shuttering member when movable upper plate is movably connected in fixedly on the upper plate, it is simple to connect technology, can enhance productivity.
The present invention also is describedly to contain presstressed reinforcing steel in cast-in-place concrete cored.Like this, the setting of prestressed reinforcement can improve cast-in-place concrete cored supporting capacity greatly, and increases cast-in-place concrete cored span.
The present invention also is describedly to contain reinforcing bar in cast-in-place concrete cored.Reinforcing bar can be cold-rolled forming section or channel-section steel or i shaped steel or other Steel section member.Like this, can improve cast-in-place concrete cored supporting capacity significantly, simultaneously, reinforcing bar is implied in that corresponding in the concrete to form no beam cast-in-place concrete cored.
The present invention also is describedly also to be provided with dark beam or/and bright beam in cast-in-place concrete cored.Like this, cast-in-place concrete cored mechanical property is better, helps that local pressure in cast-in-place concrete cored is increased the district and strengthens; When being provided with dark beam, can strengthen cast-in-place concrete cored mechanical property, simultaneously, dark beam lies in the cast-in-situ concrete hollow intralamellar part, it is attractive in appearance not influence cast-in-place concrete cored external structure, does not take the usage space of building during use, can more effectively improve the usage space of building.
(4) description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1.
Fig. 2 is the structural representation of the embodiment of the invention 2.
Fig. 3 is the structural representation of the embodiment of the invention 3.
Fig. 4 is the structural representation of the embodiment of the invention 4.
Fig. 5 is the structural representation of the embodiment of the invention 5.
Fig. 6 is the structural representation of the embodiment of the invention 6.
Fig. 7 is the structural representation of the embodiment of the invention 7.
Fig. 8 is the structural representation of the embodiment of the invention 8.
Fig. 9 is the structural representation of the embodiment of the invention 9.
Figure 10 is the structural representation of the embodiment of the invention 10.
Figure 11 is the structural representation of the embodiment of the invention 11.
Figure 12 is the structural representation of the embodiment of the invention 12.
Figure 13 is the structural representation of the embodiment of the invention 13.
(5) specific embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
The present invention as shown in drawings, comprise steel bar concrete 1, shuttering member 2, shuttering member 2 is wrapped up in and is contained in the steel bar concrete 1, shuttering member 2 is a cast-in-situ reinforced concrete rib 3 alternately each other, is cast-in-situ reinforced concrete upper plate 4 on it, it is cast-in-situ reinforced concrete lower plate 5 down, shuttering member 2 comprises upper plate 6, annular sidewall 7, and upper plate 6, annular sidewall 7 surround uncovered basin-shaped component, it is characterized in that described basin-shaped component to small part upper plate 6 is movable upper plates 52.In each accompanying drawing, 1 is steel bar concrete, and 2 is shuttering member, and 3 is the cast-in-situ reinforced concrete rib, and 4 is the cast-in-situ reinforced concrete upper plate, and 5 is the cast-in-situ reinforced concrete lower plate, and 6 is upper plate, 7 be around sidewall, 8 is through-hole pipe, 9 is removable cover, below in each accompanying drawing, number identically, its explanation is identical.As shown in Figure 1, cast-in-place concrete cored steel bar concrete 1, the shuttering member 2 of comprising, shuttering member 2 is wrapped up in and is contained in the steel bar concrete 1, shuttering member 2 is a cast-in-situ reinforced concrete rib 3 alternately each other, is cast-in-situ reinforced concrete upper plate 4 on it, it is cast-in-situ reinforced concrete lower plate 5 down, shuttering member 2 comprises upper plate 6, annular sidewall 7, and upper plate 6, annular sidewall 7 surround uncovered basin-shaped component, and its described basin-shaped component part upper plate 6 is movable upper plates 52.
The present invention also is do not have cast in place reinforced bar upper plate 4, the upper surface of upper plate 6 and cast-in-place concrete cored upper surface flush on the upper plate 6 of described shuttering member 2.As shown in Figure 2, there is not cast in place reinforced bar upper plate 4 on the upper plate 6 of its described shuttering member 2, the upper surface of upper plate 6 and cast-in-place concrete cored upper surface flush.
The present invention is that also the bottom of described shuttering member 2 does not have cast-in-situ reinforced concrete lower plate 5.As shown in Figure 3, the bottom of its described shuttering member 2 does not have cast-in-situ reinforced concrete lower plate 5.As shown in Figure 4, the bottom of its described shuttering member 2 does not have cast-in-situ reinforced concrete lower plate 5.
The present invention also is do not have cast in place reinforced bar upper plate 4 on the upper plate 6 of described shuttering member 2, the upper surface of upper plate 6 and cast-in-place concrete cored upper surface flush, and the bottom of shuttering member 2 does not have cast-in-situ reinforced concrete lower plate 5.As shown in Figure 5, there is not cast in place reinforced bar upper plate 4 on the upper plate 6 of its described shuttering member 2, the upper surface of upper plate 6 and cast-in-place concrete cored upper surface flush, the bottom of shuttering member 2 does not have cast-in-situ reinforced concrete lower plate 5.
The present invention is that also described basin-shaped component is provided with cross-arm 53, and below or movable upper plate 52 that cross-arm 53 is arranged at the movable upper plate 52 behind the location directly are shelved on the cross-arm 53.As shown in Figure 6, its described basin-shaped component is provided with cross-arm 53, and movable upper plate 52 directly is shelved on the cross-arm 53.
The present invention is that also described cross-arm 53 passes the formwork central axis.As shown in Figure 7, its described cross-arm 53 passes the formwork central axis.
The present invention is that also described movable upper plate 52 is shelved on annular sidewall 7 and the cross-arm 53 simultaneously.As shown in Figure 8, its described movable upper plate 52 is shelved on annular sidewall 7 and the cross-arm 53 simultaneously.
The present invention is that also horizontal vertical or oblique reinforcing rib 12 is arranged on the described annular sidewall 7.As shown in Figure 9, on its described annular sidewall 7 horizontal and vertical reinforcing rib 12 is arranged.
The present invention is that also there are angle brace bar 54 or gusset 55 in described annular sidewall 7 corners.As shown in figure 10, there is gusset 55 its described annular sidewall 7 corners.As shown in figure 11, there is angle brace bar 54 its described annular sidewall 7 corners.
The present invention is that also described upper plate 6 is made of two movable upper plates.As shown in figure 11, its described upper plate 6 is made of two movable upper plates.
The present invention is that also described upper plate 6 is made up of a upper plate that is fixed on sidewall and the movable upper plate of another piece.As shown in Figure 1, its described upper plate 6 is made up of a upper plate and a movable upper plate of another piece that is fixed on sidewall.
The present invention is that also described movable upper plate 52 is movably connected in fixedly on the upper plate 6.As shown in figure 10, its described movable upper plate 52 is movably connected in fixedly on the upper plate 6.
The present invention also is describedly to contain presstressed reinforcing steel 75 in cast-in-place concrete cored.As shown in figure 11, it describedly contains presstressed reinforcing steel 75 in cast-in-place concrete cored.
The present invention also is describedly to contain reinforcing bar 76 in cast-in-place concrete cored.As shown in figure 12, it describedly contains reinforcing bar 76 in cast-in-place concrete cored.As shown in figure 13, it describedly contains reinforcing bar 76 in cast-in-place concrete cored.
The present invention also is describedly also to be provided with dark beam 77 or/and bright beam 78 in cast-in-place concrete cored.As shown in figure 11, it describedly also is provided with dark beam 77 and bright beam 78 in cast-in-place concrete cored.
During the invention process, press earlier construction requirement mounting bracket or template, lay shuttering member 2, re-lay the reinforcing bar of reinforcing bar or dark beam 77 or bright beam 78, and various steel pipe buried in advance spare, pour concrete after the acceptance(check), after treating the concrete setting and harden, maintenance is to stipulating the length of time that form removal promptly gets cast-in-place concrete cored.
Claims (13)
- One kind cast-in-place concrete cored, comprise steel bar concrete (1), shuttering member (2), shuttering member (2) is wrapped up in and is contained in the steel bar concrete (1), shuttering member (2) alternately, be cast-in-situ reinforced concrete rib (3) each other, it on it cast-in-situ reinforced concrete upper plate (4), it is cast-in-situ reinforced concrete lower plate (5) down, shuttering member (2) comprises upper plate (6), annular sidewall (7), upper plate (6), annular sidewall (7) surrounds uncovered basin-shaped component, it is characterized in that described basin-shaped component to small part upper plate (6) is a movable upper plate (52), upper plate (6) is made up of a upper plate and a movable upper plate of another piece that is fixed on sidewall.
- 2. according to claim 1 a kind of cast-in-place concrete cored, it is characterized in that not having cast in place reinforced bar upper plate (4), the upper surface of upper plate (6) and cast-in-place concrete cored upper surface flush on the upper plate (6) of described shuttering member (2).
- 3. according to claim 1 a kind of cast-in-place concrete cored, it is characterized in that the bottom of described shuttering member (2) does not have cast-in-situ reinforced concrete lower plate (5).
- 4. according to claim 1 a kind of cast-in-place concrete cored, it is characterized in that not having cast in place reinforced bar upper plate (4) on the upper plate (6) of described shuttering member (2), the upper surface of upper plate (6) and cast-in-place concrete cored upper surface flush, the bottom of shuttering member (2) does not have cast-in-situ reinforced concrete lower plate (5).
- 5. described a kind of cast-in-place concrete cored according to arbitrary claim in the claim 1 to 4, it is characterized in that described basin-shaped component is provided with cross-arm (53), cross-arm (53) is arranged at the below of the movable upper plate (52) behind the location, perhaps basin-shaped component is provided with cross-arm (53), and movable upper plate (52) directly is shelved on the cross-arm (53).
- 6. according to claim 5 a kind of cast-in-place concrete cored, it is characterized in that described cross-arm (53) passes the formwork central axis.
- 7. according to claim 5 a kind of cast-in-place concrete cored, it is characterized in that described movable upper plate (52) is shelved on annular sidewall (7) and the cross-arm (53) simultaneously.
- 8. described a kind of cast-in-place concrete cored according to arbitrary claim in the claim 1 to 4, it is characterized in that horizontal vertical or oblique reinforcing rib (12) is arranged on the described annular sidewall (7).
- 9. described a kind of cast-in-place concrete cored according to arbitrary claim in the claim 1 to 4, it is characterized in that there are angle brace bar (54) or gusset (55) in described annular sidewall (7) corner.
- 10. described a kind of cast-in-place concrete cored according to arbitrary claim in the claim 1 to 4, it is characterized in that described movable upper plate (52) is movably connected in fixedly on the upper plate (6).
- 11. described a kind of cast-in-place concrete cored according to arbitrary claim in the claim 1 to 4, it is characterized in that describedly containing presstressed reinforcing steel (75) in cast-in-place concrete cored.
- 12. described a kind of cast-in-place concrete cored according to arbitrary claim in the claim 1 to 4, it is characterized in that describedly containing reinforcing bar (76) in cast-in-place concrete cored.
- 13. described a kind of cast-in-place concrete cored according to arbitrary claim in the claim 1 to 4, it is characterized in that describedly also being provided with dark beam (77) or/and bright beam (78) in cast-in-place concrete cored.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610121951XA CN1970933B (en) | 2005-08-29 | 2006-08-28 | Cast-in-situ concrete hollow slab |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510097777 | 2005-08-29 | ||
| CN200510097777.5 | 2005-08-29 | ||
| CN200610121951XA CN1970933B (en) | 2005-08-29 | 2006-08-28 | Cast-in-situ concrete hollow slab |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1970933A CN1970933A (en) | 2007-05-30 |
| CN1970933B true CN1970933B (en) | 2010-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610121951XA Expired - Fee Related CN1970933B (en) | 2005-08-29 | 2006-08-28 | Cast-in-situ concrete hollow slab |
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| Country | Link |
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| CN (1) | CN1970933B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1095204A (en) * | 1913-05-19 | 1914-05-05 | John F. Golding | Concrete floor and ceiling. |
| EP1236843A2 (en) * | 2000-12-13 | 2002-09-04 | Studio Tecnico Ing. Giorgio Cristalli | System, method and modular forms for the production of floors |
| CN1455065A (en) * | 2002-04-30 | 2003-11-12 | 邱则有 | A reinforced concrete three-dimensional load-bearing structure floor |
| CN2639399Y (en) * | 2003-07-11 | 2004-09-08 | 谢孟 | Filling internal form type cast-in-situ concrete hollow floor |
| CN1548677A (en) * | 2003-05-20 | 2004-11-24 | 邱则有 | Concrete hollow slab |
| CN1641139A (en) * | 2004-01-06 | 2005-07-20 | 邱则有 | Combined reinforced concrete hollow floorslab |
-
2006
- 2006-08-28 CN CN200610121951XA patent/CN1970933B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1095204A (en) * | 1913-05-19 | 1914-05-05 | John F. Golding | Concrete floor and ceiling. |
| EP1236843A2 (en) * | 2000-12-13 | 2002-09-04 | Studio Tecnico Ing. Giorgio Cristalli | System, method and modular forms for the production of floors |
| CN1455065A (en) * | 2002-04-30 | 2003-11-12 | 邱则有 | A reinforced concrete three-dimensional load-bearing structure floor |
| CN1548677A (en) * | 2003-05-20 | 2004-11-24 | 邱则有 | Concrete hollow slab |
| CN2639399Y (en) * | 2003-07-11 | 2004-09-08 | 谢孟 | Filling internal form type cast-in-situ concrete hollow floor |
| CN1641139A (en) * | 2004-01-06 | 2005-07-20 | 邱则有 | Combined reinforced concrete hollow floorslab |
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| Publication number | Publication date |
|---|---|
| CN1970933A (en) | 2007-05-30 |
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