CN113653300B - Efficient construction tool and construction method for concrete terrace - Google Patents
Efficient construction tool and construction method for concrete terrace Download PDFInfo
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- CN113653300B CN113653300B CN202110971007.8A CN202110971007A CN113653300B CN 113653300 B CN113653300 B CN 113653300B CN 202110971007 A CN202110971007 A CN 202110971007A CN 113653300 B CN113653300 B CN 113653300B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/20—Implements for finishing work on buildings for laying flooring
- E04F21/24—Implements for finishing work on buildings for laying flooring of masses made in situ, e.g. smoothing tools
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/20—Implements for finishing work on buildings for laying flooring
- E04F21/24—Implements for finishing work on buildings for laying flooring of masses made in situ, e.g. smoothing tools
- E04F21/241—Elongated smoothing blades or plates, e.g. screed apparatus
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention relates to the field of concrete construction, in particular to an efficient construction tool for a concrete terrace and a construction method thereof. This application has and makes the mounting panel can be in the construction area intra-area omnidirectional removal, further convenient effect to the comprehensive high efficiency of pouring of construction area concrete.
Description
Technical Field
The invention relates to the field of concrete construction, in particular to an efficient construction tool and a construction method for a concrete terrace.
Background
The reinforced concrete is a common structure in modern building construction, and the application of large-area concrete terrace in modern construction is very wide.
Chinese patent No. CN112854698A discloses a construction tool for large-area concrete terrace and a construction method thereof, wherein the construction tool includes rails located at both sides of a construction area, a plurality of movable plates are supported on the rails, all the movable plates are distributed along the length direction of the rails, a gap for pouring concrete is left between adjacent movable plates, a rotatable scraper is arranged in the gap, the scraper is used for scraping the concrete when rotating to an inclined state, and the scraper is used for filling the gap when rotating to a horizontal state.
The inventor thinks that setting up the track in construction area both sides, setting up the fly leaf on the track, because the fly leaf both ends set up on the track, deformation takes place easily in fly leaf center department, therefore the distance between the adjacent track can not be too long, because the restriction of distance between the adjacent track in the great end construction site of area, need install more parallel construction frock, can cover the construction area comprehensively, the installation is comparatively troublesome to also comparatively complicated when dismantling.
Disclosure of Invention
In order to improve the restriction of distance between the great end construction site of area because adjacent track, need install the construction frock of more parallels, just can cover comprehensive defect with the construction area, this application provides a high-efficient construction frock of concrete terrace and construction method thereof.
On the one hand, the high-efficient construction frock of concrete terrace that this application provided adopts following technical scheme:
the utility model provides a high-efficient construction frock of concrete terrace, is provided with construction mechanism between two trapped railings including the trapped railings that are located construction region both sides, construction mechanism is two follow between the trapped railing length direction slides, construction mechanism includes two parallel arrangement's slip track, edge slip track length direction sliding connection is two mounting panel between the slip track, the slip track perpendicular to the trapped railing, the slip track both ends with trapped railing sliding connection.
Through adopting above-mentioned technical scheme, through setting up the trapped orbit in construction region both sides, make the slip track can slide between the trapped orbit, mounting panel sliding connection is in the slip track simultaneously, when the mounting panel slides in the slip track, the slip track slides in the trapped orbit, makes the mounting panel can be in construction region intra-area omnidirectional removal, further convenient pouring of comprehensive high efficiency to construction region concrete.
Optionally, a first driving assembly for driving the sliding rail to slide is arranged on the fixed rail, and a second driving assembly for driving the mounting plate to slide is arranged on the sliding rail.
Through adopting above-mentioned technical scheme, drive the slip track through first drive assembly, drive the mounting panel through the second drive assembly, further the going on of convenient construction makes the comprehensive removal of mounting panel more convenient.
Optionally, the fixed track with the connection can be dismantled to the slip track, there is the dismantlement piece slip track both ends through bolted connection, dismantle piece sliding connection in the fixed track.
Through adopting above-mentioned technical scheme, can dismantle fixed track and slip track and connect, make the installation more convenient with the dismantlement, the dismantlement after the convenience is accomplished in the construction area, will dismantle a sliding connection in the slip track, further make things convenient for the orbital slip of sliding.
Optionally, a connecting strip is fixedly connected between the two disassembling blocks located in the same side of the fixed track, a sliding scraper is arranged between the two connecting strips, and the sliding scraper is parallel to the length direction of the sliding track and is consistent with the length of the sliding track.
Through adopting above-mentioned technical scheme, through fixed connection connecting strip between two dismantlement pieces, can improve two stability of dismantling the structure between the piece through the connecting strip, further improve the stability between two slip tracks.
Optionally, sliding blocks are connected to two ends of the sliding scraper, sliding grooves are formed in the connecting strip, the sliding grooves are arranged along the length direction of the connecting strip, the sliding blocks are connected in the sliding grooves in a sliding mode, and a moving assembly for driving the sliding blocks to slide is arranged on the connecting strip. .
Through adopting above-mentioned technical scheme, slide in the sliding tray through the sliding block, further make things convenient for the slip of scraper blade to the realization is strickleed off to construction area's comprehensive, when the slip track removed, the scraper blade strickles off the concrete, and the scraper blade can slide between the slip track simultaneously, reduces the scraper blade and strickles off the possibility that the dead angle appears to the concrete, improves the effect of strickleing off the concrete.
Optionally, a telescopic sleeve is arranged between the sliding scraper and the sliding block, the telescopic sleeve is fixedly connected with the sliding block, the sliding scraper is connected in the telescopic sleeve in a sliding mode, and a lifting assembly for driving the sliding scraper to lift is arranged on one side of the sliding scraper.
Through adopting above-mentioned technical scheme, with slip scraper blade sliding connection in flexible cover, can conveniently realize the slip of slip scraper blade, drive the slip scraper blade through drive assembly and contract, further convenient control to the slip scraper blade.
Optionally, a plurality of support rods are arranged between the two sliding rails, and the support rods are in sliding abutting connection with the mounting plate.
Through adopting above-mentioned technical scheme, support the mounting panel through the bracing piece, reduce the mounting panel center department and take place the crooked possibility of deformation to the backup pad can further improve the stability of structure between two slip tracks.
On the other hand, the application provides a construction method of the efficient construction tool of the concrete terrace.
A construction method of a high-efficiency construction tool of a concrete terrace comprises the following steps;
s1, paving fixed rails on two sides of the construction area;
s2, paving steel bars in the construction area;
s3, installing a sliding rail between the fixed rails;
s4, mounting connecting strips between the disassembling blocks, and mounting a sliding scraper between the two connecting strips;
s5, connecting a plurality of support rods between the sliding rails, and finally installing an installation plate between the two sliding rails;
s6, pouring concrete in the construction area, and stirring the concrete by a vibrator when a worker stands on the mounting plate;
s7, moving the sliding track to enable the sliding scraper to move to scrape the concrete;
s8, after the concrete in the area to be constructed is strickleed off, the sliding scraper is contracted into the telescopic sleeve, and workers leave from the construction area by moving the mounting plate to the edge;
And S9, removing the fixed rail and the sliding rail after the concrete is hardened.
Through adopting above-mentioned technical scheme, install the trapped orbit earlier, because the trapped orbit is installed in the outside of construction area, consequently do not influence putting into of reinforcing bar, put into the reinforcing bar after having installed the trapped orbit, later install the slip track again, make the installation more convenient, after the construction is accomplished, because construction area does not have the contact with the slip track, therefore the dismantlement of slip track is more convenient, has further improved the efficiency of construction.
In summary, the present application includes at least one of the following beneficial technical effects:
the fixed tracks are arranged on the two sides of the construction area, so that the sliding tracks can slide between the fixed tracks, the mounting plate is connected in the sliding tracks in a sliding mode, and when the mounting plate slides in the sliding tracks, the sliding tracks slide in the fixed tracks, so that the mounting plate can move in all directions in the construction area, and further, the concrete in the construction area can be poured comprehensively conveniently;
the sliding block slides in the sliding groove, so that the sliding of the scraping plate is further facilitated, the comprehensive scraping of a construction area is realized, the scraping plate scrapes the concrete when the sliding rail moves, meanwhile, the scraping plate can slide between the sliding rails, the possibility of dead corners of the scraping plate in the scraping of the concrete is reduced, and the scraping effect of the concrete is improved;
Install the trapped orbit earlier, because the trapped orbit installs in the outside of construction area, consequently do not influence putting into of reinforcing bar, put into the reinforcing bar after having installed the trapped orbit, later install the slip track again, make the installation more convenient, after the construction is accomplished, because construction area does not have the contact with the slip track, therefore the orbital dismantlement of slip is more convenient, has further improved the efficiency of construction.
Drawings
FIG. 1 is a schematic structure diagram of high-efficient construction frock of concrete terrace in this application embodiment.
Fig. 2 is an enlarged view of a point a in fig. 1.
Fig. 3 is a top view of the efficient construction tool for a concrete terrace in the embodiment of the present application.
Fig. 4 is a cross-sectional view at B-B in fig. 3.
Fig. 5 is an enlarged view at C in fig. 4.
Description of reference numerals:
01. a construction area; 1. fixing a track; 2. a construction mechanism; 3. a sliding track; 4. mounting a plate; 5. a first drive assembly; 6. a second drive assembly; 7. disassembling the block; 8. a first drive motor; 9. a first lead screw; 10. a second drive motor; 11. a second lead screw; 13. a moving block; 14. a support bar; 15. a connecting strip; 16. a sliding groove; 17. a slider; 18. a telescopic sleeve; 19. a sliding blade; 20. a lifting assembly; 21. a lifting cylinder; 22. a moving assembly; 23. a third screw rod; 24. a third drive motor; 25. a crawler belt.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
The embodiment of the application discloses high-efficient construction frock of concrete terrace. Referring to fig. 1, the efficient construction tool for the concrete terrace comprises fixed rails 1 fixedly connected to two sides of a construction area 01, the fixed rails 1 on the two sides are arranged in parallel, a construction mechanism 2 is arranged between the two fixed rails 1, the construction mechanism 2 slides along the length direction of the fixed rails 1 between the two fixed rails 1, the construction mechanism 2 comprises two sliding rails 3 arranged in parallel, and a mounting plate 4 slidably connected between the two sliding rails 3 along the length direction of the sliding rails 3.
Referring to fig. 1 and 2, the two ends of the sliding track 3 are detachably connected with the detaching blocks 7, the two ends of the detaching blocks 7 and the two ends of the sliding track 3 are connected through bolts in this embodiment, the detaching blocks 7 are slidably connected in the fixed track 1, and the fixed track 1 is provided with a first driving assembly 5 for driving the sliding track 3 to slide.
Referring to fig. 1 and 2, the first driving assembly 5 includes a first lead screw 9 rotatably connected in the fixed track 1, and a first driving motor 8 connected at one end of the fixed track 1, a motor casing of the first driving motor 8 is fixedly connected at one end of the sliding track 3, an output shaft of the first driving motor 8 passes through the side wall of the sliding track 3 and is coaxially and fixedly connected with the first lead screw 9, and the first lead screw 9 penetrates through the dismounting block 7 and is in threaded connection with the dismounting block 7.
Referring to fig. 1 and 2, the detaching block 7 is slid in the fixing rail 1 by the first driving motor 8, so that the sliding rail 3 is slid in the length direction of the fixing rail 1.
Referring to fig. 1, a second driving assembly 6 for driving the mounting plate 4 to move is arranged in the sliding track 3, the second driving assembly 6 includes a second lead screw 11 rotatably connected in the sliding track 3, a second driving motor 10 for driving the second lead screw 11 to rotate, and a moving block 13 screwed on the outer side of the second lead screw 11, the moving block 13 is slidably connected in the sliding track 3, and one side of the moving block 13 away from the bottom of the sliding track 3 is connected with the mounting plate 4 through a bolt.
Referring to fig. 1, a motor housing of the second driving motor 10 is fixedly connected to one end of the sliding track 3, a motor shaft of the second driving motor 10 is rotatably connected to the second lead screw 11 coaxially and fixedly after penetrating through one end of the sliding track 3, and the second lead screw 11 is driven to rotate by the second driving motor 10, so that the moving block 13 slides in the sliding track 3, and the mounting plate 4 further moves along the length direction of the sliding track 3.
Referring to fig. 1 and 2, in order to improve the stability of the mounting plate 4 sliding between the slide rails 3, a support rod 14 is bolted between the two slide rails 3.
Referring to fig. 3, a plurality of support rods 14 are arranged along the length direction of the sliding rail 3, in this embodiment, the support rods 14 are arranged at equal intervals, and the distance between the adjacent support rods 14 is smaller than the length of the mounting plate 4.
Referring to fig. 4 and 5, the side of the support rod 14 close to the mounting plate 4 is in sliding contact with the mounting plate 4, so that the possibility of deformation and bending of the center of the mounting plate 4 is further reduced, and the stability of the mounting plate 4 during use is improved.
Referring to fig. 1 and 2, the detachable connection of the sliding connection between the detaching blocks 7 in the same fixing rail 1 is provided with connecting strips 15, the two ends of each connecting strip 15 are connected with the detaching blocks 7 through bolts, sliding scrapers 19 are arranged between the two connecting strips 15, the sliding scrapers 19 are parallel to the length direction of the sliding rail 3, and the concrete in the construction area 01 can be scraped through the sliding scrapers 19.
Referring to fig. 2, sliding grooves 16 have been all seted up on two connecting strips 15, and sliding grooves 16 are located connecting strip 15 and keep away from fixed track 1 one side, and sliding block 17 sliding connection has in sliding grooves 16, fixedly connected with telescope tube 18 between two connecting strips 15.
Referring to fig. 4 and 5, the sliding scraper 19 is slidably connected in the telescopic sleeve 18, and the pouring and scraping of concrete are further facilitated by the extension and contraction of the sliding scraper 19.
Referring to fig. 2 and 5, a lifting assembly 20 for driving the sliding blade 19 to move is disposed on the telescopic sleeve 18, and the lifting assembly 20 includes a plurality of lifting cylinders 21. Referring to fig. 1, in the present embodiment, two lifting cylinders 21 are provided at two ends of the telescopic sleeve 18 in the length direction, a cylinder body of each lifting cylinder 21 is fixedly connected to one side of the telescopic sleeve 18, and a piston rod of each lifting cylinder 21 is fixedly connected to the sliding scraper 19 after sliding through the telescopic sleeve 18.
Referring to fig. 2, a moving assembly 22 for driving the sliding block 17 to slide in the sliding groove 16 is further disposed on the connecting bar 15, the moving assembly 22 includes a third screw 23 rotatably connected in the sliding groove 16 along the length direction of the sliding groove 16, and a third driving motor 24 for driving the third screw 23 to rotate, the third screw 23 penetrates through the sliding block 17 and is in threaded connection with the sliding block 17, a motor housing of the third driving motor 24 is fixedly connected to one end of the sliding track 3, and the third driving motor 24 and the third screw 23 are driven by a crawler 25.
Referring to fig. 2, the third screw 23 is driven by the third driving motor 24 to rotate, so that the sliding block 17 moves in the sliding groove 16, and further the sliding scraper 19 slides, thereby facilitating the scraping of the concrete.
The implementation principle of the high-efficient construction frock of this application embodiment of a concrete terrace is: through setting up trapped orbit 1 in construction region 01 both sides, with 3 sliding connection of slip track between trapped orbit 1, and slide mounting panel 4 in slip track 3, make mounting panel 4 can all-round slip in construction region 01, further make things convenient for the construction, and convenient dismantlement to trapped orbit 1 and construction machine structure 2 after the construction is accomplished, flexible slip scraper blade 19 can further make things convenient for strickleing off of concrete, the construction effect is improved, further convenient comprehensive high efficiency to the construction region 01 concrete is pour.
The embodiment of the application further discloses a construction method of the efficient construction tool of the concrete terrace. A construction method of an efficient construction tool of a concrete terrace comprises the following steps:
s1, paving fixed rails 1 on two sides of the construction area 01;
s2, paving steel bars in the construction area 01;
s3, installing a sliding rail 3 between the fixed rails 1;
s4, mounting the connecting strips 15 between the detaching blocks 7, and mounting the sliding blade 19 between the two connecting strips 15;
s5, connecting a plurality of support rods 14 between the sliding rails 3, and finally installing the installation plate 4 between the two sliding rails 3;
S6, pouring concrete in the construction area 01, and stirring the concrete by a vibrator when a worker stands on the mounting plate 4;
s7, moving the sliding rail 3 to enable the sliding scraper 19 to move to scrape the concrete;
s8, after the concrete in the area to be constructed 01 is scraped, the sliding scraper 19 is contracted into the telescopic sleeve 18, and a worker leaves from the construction area 01 by moving the mounting plate 4 to the edge;
and S9, removing the fixed rail 1 and the sliding rail 3 after the concrete is hardened.
The implementation of the construction method of the efficient construction tool for the concrete terrace in the embodiment of the application is far away from the following steps: installation trapped orbit 1 because trapped orbit 1 installs in the outside of construction area 01, consequently does not influence putting into of reinforcing bar, puts into the reinforcing bar after having installed trapped orbit 1, later installs slip track 3 again, makes installation slip track 3 more convenient, accomplishes the back at the construction, because construction area 01 does not have the contact with slip track 3, therefore the dismantlement of slip track 3 is more convenient, has further improved the efficiency of construction.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (1)
1. The construction method of the high-efficiency construction tool of the concrete terrace is applied to the following scenes, and comprises fixed tracks (1) positioned at two sides of a construction area (01), wherein a construction mechanism (2) is arranged between the two fixed tracks (1), the construction mechanism (2) slides along the length direction of the fixed tracks (1) between the two fixed tracks (1), the construction mechanism (2) comprises two sliding tracks (3) which are arranged in parallel and a mounting plate (4) which is connected between the two sliding tracks (3) in a sliding way along the length direction of the sliding tracks (3), the sliding tracks (3) are perpendicular to the fixed tracks (1), the two ends of the sliding tracks (3) are connected with the fixed tracks (1) in a sliding way, and the fixed tracks (1) are provided with first driving components (5) for driving the sliding tracks (3) to slide, the sliding track (3) is provided with a second driving component (6) for driving the mounting plate (4) to slide, the fixed track (1) and the sliding track (3) are detachably connected, two ends of the sliding track (3) are connected with dismounting blocks (7) through bolts, the dismounting blocks (7) are slidably connected in the fixed track (1), a connecting strip (15) is fixedly connected between the two dismounting blocks (7) positioned in the same fixed track (1), a sliding scraper (19) is arranged between the two connecting strips (15), the sliding scraper (19) is arranged in parallel to the length direction of the sliding track (3) and is consistent with the length of the sliding track (3), two ends of the sliding scraper (19) are connected with sliding blocks (17), a sliding groove (16) is formed in the connecting strip (15), the sliding groove (16) is arranged along the length direction of the connecting strip (15), sliding block (17) sliding connection be in sliding tray (16), be provided with on connecting strip (15) drive sliding block (17) gliding removal subassembly (22), slip scraper blade (19) with be provided with flexible cover (18) between sliding block (17), flexible cover (18) with sliding block (17) fixed connection, slip scraper blade (19) sliding connection be in flexible cover (18), slip scraper blade (19) one side is provided with lift module (20) that drive slip scraper blade (19) go up and down, is provided with a plurality of bracing pieces (14) between two slip tracks (3), bracing piece (14) with mounting panel (4) slip butt, its characterized in that following step:
S1, paving fixed rails (1) on two sides of the construction area (01);
s2, paving steel bars in the construction area (01);
s3, installing a sliding rail (3) between the fixed rails (1);
s4, mounting connecting strips (15) between the disassembling blocks (7), and mounting a sliding scraper (19) between the two connecting strips (15);
s5, connecting a plurality of support rods (14) between the sliding rails (3), and finally installing the mounting plate (4) between the two sliding rails (3);
s6, pouring concrete in the construction area (01), and stirring the concrete by a vibrator when a worker stands on the mounting plate (4);
s7, moving the sliding rail (3) to enable the sliding scraper (19) to move to scrape the concrete;
s8, after concrete in the area (01) to be constructed is scraped, the sliding scraper (19) is contracted into the telescopic sleeve (18), and workers leave from the construction area (01) by moving the mounting plate (4) to the edge;
and S9, removing the fixed rail (1) and the sliding rail (3) after the concrete is hardened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110971007.8A CN113653300B (en) | 2021-08-23 | 2021-08-23 | Efficient construction tool and construction method for concrete terrace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110971007.8A CN113653300B (en) | 2021-08-23 | 2021-08-23 | Efficient construction tool and construction method for concrete terrace |
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| Publication Number | Publication Date |
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| CN113653300A CN113653300A (en) | 2021-11-16 |
| CN113653300B true CN113653300B (en) | 2022-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110971007.8A Active CN113653300B (en) | 2021-08-23 | 2021-08-23 | Efficient construction tool and construction method for concrete terrace |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114215363A (en) * | 2021-12-20 | 2022-03-22 | 浙江银晨建设有限公司 | Large-area concrete ground seamless construction equipment and construction method thereof |
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| CN110644791A (en) * | 2019-10-16 | 2020-01-03 | 四川齐峰建设工程有限公司 | Concrete pouring platform is built in room |
| CN111206746A (en) * | 2020-01-09 | 2020-05-29 | 海达建设集团有限公司 | Construction method of large-area terrace |
| CN212027027U (en) * | 2019-12-17 | 2020-11-27 | 武汉惠帮地平工程有限公司 | Terrace roughness construction equipment |
| CN212836576U (en) * | 2020-06-10 | 2021-03-30 | 五冶集团上海有限公司 | Adjustable support rail for construction of ultra-flat terrace |
| CN112854698A (en) * | 2021-01-20 | 2021-05-28 | 江苏盛立建设发展有限公司 | Construction tool and construction method for large-area concrete terrace |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210198851A1 (en) * | 2019-12-27 | 2021-07-01 | Charles Volney Bremerman | System, method, and apparatus for leveling concrete and similar materials |
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2021
- 2021-08-23 CN CN202110971007.8A patent/CN113653300B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106835909A (en) * | 2017-03-16 | 2017-06-13 | 孙建龙 | Stent-type running gear and its integral-rotation method |
| CN110644791A (en) * | 2019-10-16 | 2020-01-03 | 四川齐峰建设工程有限公司 | Concrete pouring platform is built in room |
| CN212027027U (en) * | 2019-12-17 | 2020-11-27 | 武汉惠帮地平工程有限公司 | Terrace roughness construction equipment |
| CN111206746A (en) * | 2020-01-09 | 2020-05-29 | 海达建设集团有限公司 | Construction method of large-area terrace |
| CN212836576U (en) * | 2020-06-10 | 2021-03-30 | 五冶集团上海有限公司 | Adjustable support rail for construction of ultra-flat terrace |
| CN112854698A (en) * | 2021-01-20 | 2021-05-28 | 江苏盛立建设发展有限公司 | Construction tool and construction method for large-area concrete terrace |
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Effective date of registration: 20220527 Address after: 214000 No.9, Fangqian Fangxing Road, Xinwu District, Wuxi City, Jiangsu Province Applicant after: Jiangsu xinsuyang Construction Co.,Ltd. Address before: 214000 No.9, Fangqian Fangxing Road, Xinwu District, Wuxi City, Jiangsu Province Applicant before: Jiangsu Suyang Construction Co.,Ltd. |
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