CN111535530A - Assembled stair - Google Patents
Assembled stair Download PDFInfo
- Publication number
- CN111535530A CN111535530A CN202010441004.9A CN202010441004A CN111535530A CN 111535530 A CN111535530 A CN 111535530A CN 202010441004 A CN202010441004 A CN 202010441004A CN 111535530 A CN111535530 A CN 111535530A
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- Prior art keywords
- mounting
- groove
- hinge
- plate
- mounting groove
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/022—Stairways; Layouts thereof characterised by the supporting structure
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Steps, Ramps, And Handrails (AREA)
Abstract
The invention discloses an assembled stair, which relates to the technical field of constructional engineering and comprises a prefabricated stair and two installation platforms, wherein the upper end and the lower end of the prefabricated stair are respectively provided with an installation plate, the upper end surface of each installation platform is correspondingly provided with an installation groove for embedding the installation plate, and the assembled stair further comprises: the accommodating grooves are formed in the upper end face of each mounting platform and located on one side, away from the prefabricated staircase, of the mounting groove, and the accommodating grooves are communicated with the mounting groove; the first dowel bars are positioned on the side walls, facing the mounting groove, of the accommodating grooves; the second dowel bar, the second dowel bar is located the mounting panel and keeps away from the one end of prefabricated stair, and when the mounting panel was located the mounting groove, the second dowel bar was located the holding tank that corresponds and with the setting of staggering of first dowel bar. Through setting up holding tank, first dowel and second dowel, fix through pouring into cement mortar into to the holding tank for assembled stair connection structure is stronger, makes holistic use safer lasting.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to an assembled stair.
Background
The stairs are used as main vertical traffic and main channels for emergency evacuation of the building, and have important influence on normal use and emergency evacuation of the whole building. The assembled stair is prefabricated at first, then arrives the scene and installs for the stair of building are built more high-efficiently.
For example, chinese patent No. CN110847525A discloses an assembled stair convenient to assemble and disassemble, which includes a base frame, a top plate and a bottom plate are fixed at two ends of the base frame respectively, a first platform and a second platform are fixed on the top plate and the bottom plate respectively, a plurality of step plates distributed at equal intervals are fixed on the outer wall of the top of the base frame, and positioning blocks corresponding to the step plates are fixed on the base frame. During installation, the top plate and the bottom plate are respectively fixed on the first platform and the second platform through the positioning columns.
When the assembly type stair is adopted, the top plate and the bottom plate are only fixed on the first platform and the second platform through the positioning columns, so that the strength of the integrally installed connecting structure of the stair and a building body is insufficient and needs to be improved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an assembly type stair which has the advantage of stronger connection structure of the assembly type stair.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides an assembled stair, includes prefabricated stair and two mounting platforms, the upper and lower both ends of prefabricated stair are provided with the mounting panel respectively, and the mounting groove that supplies the mounting panel embedding is seted up in mounting platform's up end correspondence, still includes:
the accommodating grooves are formed in the upper end face of each mounting platform and located on one side, away from the prefabricated staircase, of the mounting groove, and the accommodating grooves are communicated with the mounting groove;
the first dowel bars are positioned on the side walls, facing the mounting groove, of the accommodating grooves;
the second dowel bar, the second dowel bar is located the mounting panel and keeps away from the one end of prefabricated stair, and when the mounting panel was located the mounting groove, the second dowel bar was located the holding tank that corresponds and with the setting of staggering of first dowel bar.
Through above-mentioned technical scheme, first dowel bar and second dowel bar are the reinforcing bar, when prefabricated staircase installation, through the loop wheel machine with prefabricated staircase hoist, then aim at the mounting groove with the mounting panel on the prefabricated staircase and pack into, first dowel bar and second dowel bar all lie in the holding tank setting this moment. The mounting panel forms the die cavity of cement mortar with the lateral wall concatenation of holding tank this moment, then pours into cement mortar into the holding tank into, carries out fixed connection to mounting platform and mounting panel through the cement mortar solidification. Set up holding tank, first dowel and second dowel, fix through pouring into cement mortar into the holding tank, the intensity of cement mortar solidification is far greater than the location of current reference column to make assembled stair connection structure stronger, make holistic use safer lasting.
The present invention in a preferred example may be further configured to: a plurality of breachs have been seted up to the lower terminal surface of mounting panel, the breach is located the mounting panel and keeps away from prefabricated staircase's one end and distributes along the horizontal direction, the quantity and the position of breach all correspond the confession with first dowel bar corresponds and stretches into.
Through above-mentioned technical scheme, through setting up the breach, the setting of breach can increase the contact surface of cement mortar and mounting panel for after the whole solidification, cement mortar is stronger to the fixed effect of mounting panel, and first dowel correspondence stretches into the breach in addition, makes after the cement mortar solidification, can further strengthen the structural strength after the cement mortar solidification through the dowel.
The present invention in a preferred example may be further configured to: ribs are vertically arranged in the mounting grooves, and the upper end surfaces of the ribs are lower than the upper end surface of the mounting platform; the mounting plate is correspondingly provided with mounting holes corresponding to the ribs, and the diameter of each mounting hole is larger than that of each rib.
Through above-mentioned technical scheme, after the mounting panel is correspondingly packed into in the mounting groove, the rib correspondence is located the mounting hole, can further fix through pouring into cement mortar into the mounting hole for holistic connection structure is stronger.
The present invention in a preferred example may be further configured to: two hinge grooves are further formed in the upper end face of the mounting platform, the hinge grooves are correspondingly located on two sides of the mounting plate along the distribution direction of the prefabricated staircase, and the hinge grooves are communicated with the mounting groove.
Through above-mentioned technical scheme, set up the hinge groove, hinge groove department also can further fill cement mortar for the both sides and the tip of mounting panel are all fixed through cement mortar, make holistic concatenation intensity better.
The present invention in a preferred example may be further configured to: a guide plate is hinged in each hinge groove, the hinge axis of each guide plate is positioned in each hinge groove and staggered with the end part of each guide plate, and the hinge axis of each guide plate is horizontal and parallel to the corresponding side wall of the mounting plate; the focus of deflector is higher than the articulated axis setting of deflector, works as when the lateral wall upper end of mounting groove is kept away from to the deflector conflict hinge groove, the deflector is the slope towards the direction of keeping away from the mounting groove and upwards sets up, just the lower extreme of deflector stretches into the mounting groove setting.
Through above-mentioned technical scheme, during the prefabricated staircase installation, the deflector upset to conflict hinge groove upper end and be the orientation slope of keeping away from the mounting groove and state upwards, the deflector is used for the operation that the mounting panel was embedded into the mounting groove this moment. After the mounting panel was embedded into the mounting groove, the deflector lower extreme made the deflector be in vertical state under the conflict of mounting panel, and the hinge joint groove can further be filled through cement mortar this moment to be connected the mounting panel of prefabricated staircase with mounting platform more stably.
The present invention in a preferred example may be further configured to: the lateral wall upper end that the mounting groove was kept away from in the hinge groove is provided with the inclined plane, inclined plane laminating deflector sets up.
Through above-mentioned technical scheme, set up the inclined plane, support the deflector through the inclined plane for line contact turns into the face contact, thereby makes the articulated groove upper end lateral wall more stable to the support of deflector.
The present invention in a preferred example may be further configured to: the guide plate comprises a guide main body hinged to the hinge groove and a hinge plate hinged to the upper end of the guide main body, and the inclined surface is correspondingly attached to the guide main body; the hinged plate is overturned to a state of 180 degrees with the guide main body at the maximum towards the direction away from the mounting groove; the hinge plate is provided with a long hole, and the mounting plate is correspondingly provided with a threaded hole corresponding to the long hole; when the mounting panel was located the mounting groove, the articulated slab upset is to laminating mounting panel and rectangular hole alignment screw hole setting.
Through the technical scheme, after the mounting panel corresponds and is embedded into the mounting groove, the direction main part overturns to vertical state under the conflict of mounting panel, at this moment, the articulated slab overturns to the state of laminating in the mounting panel up end under the rotation inertia of direction main part drives, the rectangular hole corresponds and aims at the screw hole setting this moment, pass through the bolt this moment behind the rectangular hole and fix with screw hole threaded connection, thereby it is more convenient to make holistic installation, further fix articulated slab and mounting panel through the bolt in addition, make holistic fixed knot structure more stable.
The present invention in a preferred example may be further configured to: the upper end surface of the mounting plate is provided with two splicing grooves, the splicing grooves are correspondingly positioned on two sides of the mounting plate along the distribution direction of the prefabricated staircase, the two splicing grooves are correspondingly embedded by the hinged plates, and the threaded holes are correspondingly positioned at the bottoms of the splicing grooves; when the hinged plates are turned into the splicing grooves, the upper end surfaces of the hinged plates are lower than the upper end surfaces of the mounting plates.
Through the technical scheme, after the hinged plates are correspondingly embedded into the splicing grooves, the upper end faces of the mounting plates and the mounting platform are leveled through cement mortar, so that the upper end faces are smoother after mounting.
The present invention in a preferred example may be further configured to: the spread groove has still been seted up to the inside wall of mounting groove, the tank bottom that the spread groove is close to the mounting groove sets up and communicates holding tank and articulated groove set up.
Through above-mentioned technical scheme, when carrying out the injected cement mortar to the holding tank, cement mortar can flow through the spread groove and supply to articulated inslot for the operation of inserting of cement mortar is more convenient, and in addition, the setting up of spread groove can also increase the solid face that closes of cement mortar between to mounting platform and the mounting panel, makes holistic structural strength better.
Compared with the prior art, the invention has the beneficial effects that:
(1) by arranging the accommodating groove, the first dowel and the second dowel and injecting cement mortar into the accommodating groove for fixing, the assembled stair connecting structure is stronger, and the integral stair is safer and more durable in use;
(2) by arranging the guide plate and the inclined surface, the guide plate can guide the installation groove for installing the installation plate, and the inclined surface is used for supporting the guide plate, so that the linear contact is converted into the surface contact, and the side wall at the upper end of the hinge groove can more stably support the guide plate;
(3) through setting up direction main part and articulated slab, articulated slab upper end rectangular hole can further be fixed articulated slab and mounting panel through the bolt with the screw hole cooperation of concatenation groove for holistic fixed knot constructs more stably.
Drawings
FIG. 1 is an overall schematic view of an embodiment;
FIG. 2 is a schematic partial exploded view of an embodiment;
FIG. 3 is a schematic structural diagram of a mounting platform of an embodiment;
FIG. 4 is a schematic cross-sectional view of a mounting platform of an embodiment;
fig. 5 is an enlarged view of a portion a of fig. 4.
Reference numerals: 1. prefabricating a stair; 2. mounting a platform; 3. mounting a plate; 4. a second dowel; 5. a notch; 6. mounting holes; 7. mounting grooves; 8. ribs; 9. accommodating grooves; 10. a first dowel; 11. a hinge slot; 12. connecting grooves; 13. an inclined surface; 14. a guide plate; 141. a guide body; 142. a hinge plate; 15. a limiting part; 16. a strip hole; 17. splicing grooves; 18. a threaded bore.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
Example (b):
an assembled stair is shown in fig. 1 and 2, and comprises a prefabricated stair 1 and two installation platforms 2. The upper and lower both ends of prefabricated stair 1 are fixed with mounting panel 3 respectively, and two mounting panels 3 all are square slab shape setting and two mounting panels 3 parallel arrangement each other towards the direction of keeping away from prefabricated stair 1. One end of each mounting plate 3 far away from the prefabricated staircase 1 is fixed with a plurality of second dowels 4, each second dowel 4 is formed by two vertically distributed steel bars, and the second dowels 4 extend along the horizontal direction towards the direction far away from the mounting plates 3. A plurality of notches 5 are further formed in the lower end face of each mounting plate 3, and each notch 5 penetrates through the mounting plate 3 in the vertical direction. Breach 5 is located mounting panel 3 and keeps away from the one end of prefabricated stair 1 and distributes along the horizontal direction, and every breach 5 corresponds and is located to set up between adjacent second dowel bar 4. Mounting hole 6 has still been seted up to the up end of mounting panel 3, and mounting hole 6 is the round hole setting.
Two mounting platforms 2 all are fixed in and supply prefabricated staircase 1's mounting panel 3 to install on the building. Mounting groove 7 has all been seted up to every mounting platform 2's up end. The rib 8 is vertically fixed in the mounting groove 7, and the upper end face of the rib 8 is lower than the upper end face of the mounting platform 2. The rib 8 is the reinforcing bar, and the position of rib 8 corresponds the setting with mounting hole 6 and the diameter of rib 8 is less than the diameter setting of mounting hole 6.
When prefabricated staircase 1 needs the installation, install in mounting groove 7 is embedded in the mounting panel 3 correspondence of prefabricated staircase 1, at this moment, the up end of mounting panel 3 sets up with mounting platform 2's up end parallel and level, and rib 8 corresponds and is located mounting hole 6, and first dowel bar 10 corresponds and stretches into in mounting panel 3's breach 5, and second dowel bar 4 on the mounting panel 3 corresponds and is located holding tank 9, and the setting of all staggering of second dowel bar 4 and first dowel bar 10's position.
As shown in fig. 3 and 4, two hinge grooves 11 are further formed in the upper end surface of each mounting platform 2, the two hinge grooves 11 are correspondingly located on two sides of the mounting plate 3 along the distribution direction of the prefabricated staircase 1, and the hinge grooves 11 are communicated with the mounting groove 7. Mounting groove 7 corresponds the up end of the lateral wall in hinge groove 11 and all is provided with the chamfer, and spread groove 12 has still been seted up to mounting groove 7's inside wall, and spread groove 12 is close to the tank bottom setting of mounting groove 7, and spread groove 12 sets up and communicates holding tank 9 and hinge groove 11 setting along the horizontal direction.
As shown in fig. 3 and 5, an inclined surface 13 is provided at the upper end of the side wall of each hinge groove 11 far from the mounting groove 7, a guide plate 14 is hinged in each hinge groove 11, and the hinge axis of the guide plate 14 is located in the hinge groove 11 and is offset from the end of the guide plate 14. The hinge axis of the guide plate 14 is horizontal and parallel to the corresponding side wall of the mounting plate 3, and the center of gravity of the guide plate 14 is higher than the hinge axis of the guide plate 14.
The guide plate 14 includes a guide body 141 hinged to the hinge groove 11, and a hinge plate 142 hinged to an upper end of the guide body 141. One end of the guide main body 141 close to the hinge plate 142 is integrally formed with a stopper 15, and the stopper 15 is located on the side of the guide main body 141 away from the mounting groove 7. When the hinge plate 142 and the guide main body 141 are turned to 180 degrees, the stopper 15 is used for abutting against the hinge plate 142 to limit the turning of the hinge plate 142, so that the hinge plate 142 is turned to a state of 180 degrees with the guide main body 141 at the maximum in a direction away from the mounting groove 7. The hinge plate 142 has a slot 16 formed in an end surface thereof away from the mounting groove 7, and the slot 16 extends in a direction away from the guide body 141.
As shown in fig. 2, two splicing grooves 17 are further formed in the upper end surface of the mounting plate 3, and the splicing grooves 17 are correspondingly located on two sides of the mounting plate 3 along the distribution direction of the prefabricated staircase 1. Threaded holes 18 corresponding to the strip holes 16 are formed at the bottoms of the two splicing grooves 17.
The working principle of the embodiment is as follows:
when the prefabricated staircase 1 is installed, the guide main body 141 and the hinge plate 142 of the guide plate 14 are firstly turned over to the inclined surface 13 which is attached to the corresponding hinge groove 11 and far away from the side wall of the installation groove 7, so that the guide plate 14 is inclined and upwards arranged towards the direction far away from the installation groove 7, and the lower end of the guide plate 14 extends into the installation groove 7. The guide plate 14 is now arranged flush with the plane formed by the chamfer of the mounting groove 7, close to the upper end face of the mounting groove 7. The mounting plate 3 is then placed against the mounting slot 7 by means of a crane, during which the guide plates 14 are held stable by the inclined surface 13 and the support of the hinge axis, and the two guide plates 14 of each mounting platform 2 can guide the process of mounting the mounting plate 3 into the mounting slot 7.
After the mounting plate 3 is correspondingly embedded into the mounting groove 7, the guide main body 141 is turned to a vertical state under the collision of the mounting plate 3, at the moment, the hinged plate 142 is driven by the rotation inertia of the guide main body 141 to be turned to a state of being attached to the splicing groove 17 of the mounting plate 3 and being located at the bottom of the splicing groove 17, the upper end face of the hinged plate 142 is lower than the upper end face of the mounting plate 3, the strip hole 16 is correspondingly aligned with the threaded hole 18, and then the bolt penetrates through the strip hole 16 and then is fixed with the threaded hole 18 in a threaded connection mode. At last through adding cement mortar in to holding tank 9, cement mortar can mend simultaneously articulated inslot 11 through the intercommunication groove in, fill into cement mortar simultaneously to mounting hole 6, and it can to the up end parallel and level with mounting panel 3 and mounting platform 2 to trowel the up end of cement mortar at last.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (9)
1. The utility model provides an assembled stair, includes prefabricated stair (1) and two mounting platform (2), the upper and lower both ends of prefabricated stair (1) are provided with mounting panel (3) respectively, and mounting groove (7) that supply mounting panel (3) embedding, its characterized in that are seted up in the up end correspondence of mounting platform (2): further comprising:
the accommodating grooves (9) are formed in the upper end face of each mounting platform (2) and are located on one side, away from the prefabricated staircase (1), of each mounting groove (7), and the accommodating grooves (9) are communicated with the mounting grooves (7);
the first dowel bar (10) is positioned on the side wall, facing the mounting groove (7), of the accommodating groove (9);
second dowel steel (4), second dowel steel (4) are located mounting panel (3) and keep away from the one end of prefabricated stair (1), and when mounting panel (3) were located mounting groove (7), second dowel steel (4) were located corresponding holding tank (9) and with first dowel steel (10) setting of staggering.
2. The fabricated staircase of claim 1, wherein: a plurality of breachs (5) have been seted up to the lower terminal surface of mounting panel (3), breach (5) are located mounting panel (3) and keep away from the one end of prefabricated stair (1) and distribute along the horizontal direction, the quantity and the position of breach (5) all correspond the confession with first dowel (10) correspond and stretch into.
3. A fabricated staircase as defined in claim 2, wherein: ribs (8) are vertically arranged in the mounting grooves (7), and the upper end surfaces of the ribs (8) are lower than the upper end surface of the mounting platform (2); the mounting plate (3) is correspondingly provided with mounting holes (6) corresponding to the ribs (8), and the diameter of each mounting hole (6) is larger than the arrangement of the ribs (8).
4. The fabricated staircase of claim 1, wherein: two hinge grooves (11) have still been seted up to the up end of mounting platform (2), two hinge groove (11) correspond and are located mounting panel (3) along the both sides of prefabricated staircase (1) distribution direction, just hinge groove (11) and mounting groove (7) intercommunication set up.
5. A fabricated staircase as defined in claim 4, wherein: a guide plate (14) is hinged in each hinge groove (11), the hinge axis of each guide plate (14) is positioned in each hinge groove (11) and staggered with the end part of each guide plate (14), and the hinge axis of each guide plate (14) is horizontal and parallel to the corresponding side wall of the mounting plate (3); the focus of deflector (14) is higher than the articulated axis setting of deflector (14), works as when the lateral wall upper end of mounting groove (7) is kept away from in deflector (14) conflict hinge groove (11), deflector (14) are the slope towards the direction of keeping away from mounting groove (7) and upwards set up, just the lower extreme of deflector (14) stretches into mounting groove (7) and sets up.
6. A fabricated staircase as defined in claim 5, wherein: the hinge groove (11) is far away from the upper end of the side wall of the mounting groove (7) and is provided with an inclined surface (13), and the inclined surface (13) is attached to the guide plate (14).
7. The fabricated staircase of claim 6, wherein: the guide plate (14) comprises a guide main body (141) hinged to the hinge groove (11) and a hinge plate (142) hinged to the upper end of the guide main body (141), and the inclined surface (13) is correspondingly attached to the guide main body (141); the hinge plate (142) is turned over to a state of 180 degrees with the guide main body (141) at the maximum in the direction away from the mounting groove (7); the hinge plate (142) is provided with a long hole (16), and the mounting plate (3) is correspondingly provided with a threaded hole (18) corresponding to the long hole (16); when the mounting plate (3) is positioned in the mounting groove (7), the hinge plate (142) is turned over to be attached to the mounting plate (3) and the strip hole (16) is aligned with the threaded hole (18).
8. The fabricated staircase of claim 7, wherein: the upper end surface of the mounting plate (3) is provided with two splicing grooves (17), the splicing grooves (17) are correspondingly positioned on two sides of the mounting plate (3) along the distribution direction of the prefabricated staircase (1), the two splicing grooves (17) are correspondingly embedded by hinge plates (142), and the threaded holes (18) are correspondingly positioned at the bottom of the splicing grooves (17); when the hinge plates (142) are turned into the splicing grooves (17), the upper end surfaces of the hinge plates (142) are lower than the upper end surface of the mounting plate (3).
9. The fabricated staircase of claim 7, wherein: connecting groove (12) have still been seted up to the inside wall of mounting groove (7), connecting groove (12) are close to the tank bottom setting of mounting groove (7) and communicate holding tank (9) and articulated groove (11) set up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010441004.9A CN111535530B (en) | 2020-05-22 | 2020-05-22 | Assembled stair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010441004.9A CN111535530B (en) | 2020-05-22 | 2020-05-22 | Assembled stair |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111535530A true CN111535530A (en) | 2020-08-14 |
| CN111535530B CN111535530B (en) | 2021-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010441004.9A Active CN111535530B (en) | 2020-05-22 | 2020-05-22 | Assembled stair |
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| CN (1) | CN111535530B (en) |
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| CN208604956U (en) * | 2018-08-02 | 2019-03-15 | 济南天泽集成房屋有限公司 | A kind of concrete column cushion block |
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| AU2019203603B1 (en) * | 2018-06-20 | 2020-01-23 | Strictly Stairs Australia Pty Ltd | Stair assembly and method |
| CN110805284A (en) * | 2019-11-19 | 2020-02-18 | 王柏彰 | Prefabricated member installation construction equipment for prefabricated reinforced concrete of prefabricated building |
| CN210263678U (en) * | 2019-06-30 | 2020-04-07 | 天津合嘉金工建筑工业有限公司 | Novel prefabricated part of assembled stair |
| CN210563064U (en) * | 2019-08-05 | 2020-05-19 | 惠州市鸿泰建筑工程有限公司 | Prefabricated staircase |
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|---|---|---|---|---|
| JPH0216262A (en) * | 1988-07-05 | 1990-01-19 | Sekisui House Ltd | Ceiling board lifter |
| WO2008104166A2 (en) * | 2007-02-28 | 2008-09-04 | Roland Weber | Mobile production of precast concrete parts |
| CN204715776U (en) * | 2015-06-16 | 2015-10-21 | 中民筑友有限公司 | Prefabricated units locating guide device |
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| AU2019203603B1 (en) * | 2018-06-20 | 2020-01-23 | Strictly Stairs Australia Pty Ltd | Stair assembly and method |
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| CN110593500A (en) * | 2019-09-27 | 2019-12-20 | 安徽建筑大学城市建设学院 | Safe and firm assembled earthquake-resistant stair |
| CN110805284A (en) * | 2019-11-19 | 2020-02-18 | 王柏彰 | Prefabricated member installation construction equipment for prefabricated reinforced concrete of prefabricated building |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111535530B (en) | 2021-06-01 |
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