CN219710912U - Land-saving type construction temporary construction platform - Google Patents
Land-saving type construction temporary construction platform Download PDFInfo
- Publication number
- CN219710912U CN219710912U CN202321218111.0U CN202321218111U CN219710912U CN 219710912 U CN219710912 U CN 219710912U CN 202321218111 U CN202321218111 U CN 202321218111U CN 219710912 U CN219710912 U CN 219710912U
- Authority
- CN
- China
- Prior art keywords
- steel
- side wall
- outer side
- land
- frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010276 construction Methods 0.000 title claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 195
- 239000010959 steel Substances 0.000 claims abstract description 195
- 238000010079 rubber tapping Methods 0.000 claims description 31
- 239000000463 material Substances 0.000 abstract description 6
- 238000009435 building construction Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 2
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 238000009415 formwork Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
Landscapes
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
The utility model discloses a land-saving type construction temporary construction platform, which belongs to the technical field of building construction and comprises a bottom plate, wherein a first supporting component for preliminarily supporting the platform is arranged at the top of the bottom plate, square steel is attached to the inner side wall of a concrete base, bolts are connected with the top of the concrete base in a threaded manner, a second supporting component for further supporting the platform is arranged at the top of the bottom plate, an outer frame is arranged at the top of the square steel, I-shaped steel is fixedly connected to the inner side wall of the outer frame, and a steel plate is overlapped at the top of the outer frame. This platform is built to festival ground construction face for square steel supports the bottom four corners department of frame, and the steel pipe further supports the I shape steel, and the rethread frame uses with the cooperation of I shape steel, increases the bearing capacity of steel sheet, thereby further supports the position that is close to center department to the steel sheet bottom when supporting steel sheet bottom four corners department, builds the in-process and selects a plurality of steel materials to build, and the material selection is convenient.
Description
Technical Field
The utility model belongs to the technical field of building construction, and particularly relates to a land-saving type construction temporary construction platform.
Background
With the development of society, urban buildings are built anywhere, and in high-rise building construction, a construction temporary building platform is required to be built, and temporary building, structures and other temporary facilities for life and production, which are required to be built by construction enterprises for engineering construction, are required to be built.
The existing temporary construction platform comprises:
the utility model discloses a land-saving type construction temporary construction platform for CN218562585U, and relates to the technical field of building construction. The technical key points are as follows: the system comprises a plurality of independent concrete foundations arranged on the ground, wherein the adjacent independent concrete foundations are arranged at intervals, the upper surfaces of the plurality of independent concrete foundations are all located at the same elevation, an upright post is arranged above the independent concrete foundations, the lower ends of the upright posts are fixedly connected with the independent concrete foundations, the upper ends of the upright posts are provided with frame assemblies, all the upright posts are connected with the frame assemblies, cantilever beams are respectively arranged around the outer sides of the frame assemblies, and a temporary building installation platform is arranged above the frame assemblies; the independent concrete foundations are distributed on the ground in a rectangular array mode, and a construction channel is arranged in the middle of a rectangle formed by the independent concrete foundations. The temporary construction is built by utilizing the upper space of the road in the building construction site, so that the problem that the temporary construction site is narrow in temporary land and cannot be built on site is solved;
the temporary construction platform is built by utilizing the upper space of a road in a construction site, so that the problem that the temporary construction site is narrow and cannot be built on site is solved, in the prior art, a bottom supporting structure of the temporary construction platform is formed by combining steel materials and concrete bases, and because the bottom of the platform is required to save space, the penetration of workers is convenient, the building of the bottom supporting structure of the platform is required to be considered, and when the temporary construction platform is built, the four corners at the bottom of the platform and the position, close to the center, of the bottom of the platform are possibly inconvenient to support at the same time, so that the bearing capacity of the platform is greatly reduced, and the traditional supporting structure is complex in material selection;
for the problems in the related art, no effective solution has been proposed at present.
Disclosure of Invention
Aiming at the problems in the related art, the utility model provides a land-saving type construction temporary construction platform to overcome the technical problems in the prior related art.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a land-saving type construction temporary construction platform, which comprises a bottom plate,
the top of the bottom plate is provided with a first supporting component for preliminarily supporting the platform, the first supporting component comprises a concrete base poured at the top of the bottom plate, square steel is attached to the inner side wall of the concrete base, the top of the concrete base is connected with a bolt in a threaded manner, and the bolt penetrates through the outer side of the bottom of the square steel in a threaded manner;
the top of the bottom plate is provided with a second supporting component for further supporting the platform, the second supporting component comprises a round base poured at the top of the bottom plate, and the inner bottom wall of the round base is abutted with a steel pipe;
the frame is installed at the top of square steel, the inside wall fixedly connected with worker shape steel of frame, the bottom of worker shape steel and the top fixed connection of steel pipe, the top overlap joint of frame has the steel sheet, the bottom of steel sheet is laminated with the top of worker shape steel.
Preferably, the top of concrete base has seted up first screw hole, the second screw hole has been seted up in the bottom outside of square steel, the inside wall of first screw hole, the inside wall of second screw hole respectively with the lateral wall looks adaptation of bolt.
Through setting up first screw hole and second screw hole, realized being convenient for the bolt and link together square steel and concrete base.
Preferably, the top threaded connection of steel sheet has first expansion bolt, the lateral wall screw thread of first expansion bolt runs through the steel sheet after with the top threaded connection of frame, the top threaded connection of steel sheet has the second expansion bolt, the lateral wall screw thread of second expansion bolt runs through the steel sheet after with the top threaded connection of I-shaped steel.
Through setting up first expansion bolt and second expansion bolt, realize fixing the steel sheet at the top of frame and I-shaped steel
Preferably, the outer side wall of the steel pipe is connected with a sleeve in a sliding mode, and the outer side wall of the sleeve is fixedly connected with a connecting rod.
Through setting up sleeve pipe and connecting rod, realized linking together four steel pipes, increased the support ability of steel pipe to the steel sheet.
Preferably, the outer side wall of the sleeve is in threaded connection with a first self-tapping screw, and the outer side wall of the first self-tapping screw is in threaded connection with the outer side wall of the steel pipe.
Through setting up first self-tapping screw, realize connecting fixed sleeve pipe and steel pipe.
Preferably, the U-shaped steel is installed to the lateral wall of square steel, the inside wall sliding connection of U-shaped steel has the horizontal steel, the lateral wall threaded connection of U-shaped steel has the second self-tapping screw, the lateral wall and the lateral wall threaded connection of horizontal steel of second self-tapping screw.
By arranging the U-shaped steel, the horizontal steel and the second self-tapping screw, the two adjacent square steels with shorter intervals are connected together.
Preferably, the top fixedly connected with vertical steel of horizontal steel, the top fixedly connected with mounting panel of vertical steel, the top of mounting panel is laminated with the bottom of frame, the bottom threaded connection of mounting panel has the third self-tapping screw, the lateral wall and the bottom threaded connection of frame of third self-tapping screw.
Through setting up perpendicular steel, mounting panel and third self-tapping screw, realized further supporting steel sheet bottom both sides.
In summary, the technical effects and advantages of the present utility model are: this platform is faced in construction of festival ground type, through the effect of concrete base and circular base, the square steel of being convenient for respectively and the laying of steel pipe, through the effect of bolt, the bottom and the concrete base of square steel are together fixed, make the square steel support the bottom four corners department of frame, the steel pipe further supports the industry form steel, the cooperation of rethread frame and industry form steel is used, increase the bearing capacity of steel sheet, thereby further support the position that is close to center department to the steel sheet bottom when supporting the steel sheet bottom four corners department, set up the in-process and select a plurality of steel materials to put up, the material selection is convenient.
The square steel and the steel pipes are arranged in a staggered mode, so that part of space at the top of the bottom plate is saved, and constructors can pass through the top of the bottom plate in an inserting mode to walk.
Through the cooperation of U shaped steel, horizontal steel and second self-tapping screw, link together two square steel that the interval is shorter, the cooperation of rethread vertical steel, mounting panel and third self-tapping screw uses, increases the bearing capacity of frame bottom both sides to increase the bearing capacity of steel sheet both sides.
Drawings
FIG. 1 is a schematic perspective view of the present utility model;
FIG. 2 is a schematic view of an I-shaped steel structure of the present utility model;
FIG. 3 is an exploded view of the square steel and its related structure according to the present utility model;
fig. 4 is a schematic view of the horizontal steel structure of the present utility model.
In the figure: 1. a bottom plate; 2. a first support assembly; 21. a concrete base; 22. square steel; 23. a bolt; 24. a first threaded hole; 25. a second threaded hole; 3. a second support assembly; 31. a circular base; 32. a steel pipe; 33. a sleeve; 34. a first self-tapping screw; 35. a connecting rod; 4. an outer frame; 5. a steel plate; 6. i-shaped steel; 7. a first expansion bolt; 8. a second expansion bolt; 9. u-shaped steel; 10. horizontal steel; 11. a second self-tapping screw; 12. vertical steel; 13. a mounting plate; 14. and a third self-tapping screw.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
Referring to fig. 1-4, a land-saving type construction temporary construction platform comprises a bottom plate 1, wherein a first supporting component 2 for preliminarily supporting the platform is arranged at the top of the bottom plate 1, the first supporting component 2 comprises concrete bases 21 poured at the top of the bottom plate 1, the four concrete bases 21 are arranged at four corners of the top of the bottom plate 1, the cross sections of the concrete bases 21 are gradually reduced from top to bottom, square steel 22 is attached to the inner side walls of the concrete bases 21, the square steel 22 is 4*4 in size, bolts 23 are connected with the top threads of the concrete bases 21, and the outer side wall threads of the bolts 23 penetrate the outer side of the bottom of the square steel 22;
the top of the bottom plate 1 is provided with a second supporting component 3 for further supporting the platform, the second supporting component 3 comprises four round bases 31 poured on the top of the bottom plate 1, the four round bases 31 are uniformly distributed at positions close to the center of the top of the bottom plate 1, the inner bottom wall of each round base 31 is abutted with a steel pipe 32, and a moving space is reserved between every two adjacent steel pipes 32;
the top of the square steel 22 is provided with an outer frame 4, the outer frame 4 is welded with the square steel 22, the cross section of the outer frame 4 is in a shape like a Chinese character 'hui', the inner side wall of the outer frame 4 is fixedly connected with I-shaped steel 6, the total cross section of the I-shaped steel 6 is in a shape like a Chinese character 'i', the I-shaped steel 6 is two, the two I-shaped steel 6 are symmetrically distributed by taking the central axis of the outer frame 4 as a center, the bottom of the I-shaped steel 6 is fixedly connected with the top of the steel pipe 32, the I-shaped steel 6 is welded with the steel pipe 32, the top of the outer frame 4 is lapped with a steel plate 5, the bottom of the steel plate 5 is jointed with the top of the I-shaped steel 6, and the periphery of the steel plate 5 is in contact with the outer Zhou Xiangdeng of the outer frame 4;
the concrete base 21 and the round base 31 are poured at the top of the bottom plate 1, the square steel 22 moves to the inside of the concrete base 21, the square steel 22 and the concrete base 21 are fixed together by the bolts 23, the bottom of the steel pipe 32 is inserted into the inside of the round base 31, the outer frame 4 moves to be attached to the top of the square steel 22, the I-shaped steel 6 moves to be attached to the top of the steel pipe 32, then the connection part of the outer frame 4 and the square steel 22 and the connection part of the I-shaped steel 6 and the steel pipe 32 are welded respectively, and finally the steel plate 5 with proper size is paved at the top of the outer frame 4, so that the four corners of the bottom of the steel plate 5 are supported, the positions of the bottom of the steel plate 5, which are close to the center, are further supported, and the four square steels 22 and the four steel pipes 32 are arranged at the top of the bottom plate 1 in a staggered manner, so that workers can walk alternately from building.
Referring to fig. 3, a first screw hole 24 is formed in the top of the concrete base 21, a second screw hole 25 is formed in the outer side of the bottom of the square steel 22, the inner periphery of the first screw hole 24 is matched with the inner side Zhou Xiangdeng of the second screw hole 25, the inner side wall of the first screw hole 24 and the inner side wall of the second screw hole 25 are respectively matched with the outer side wall of the bolt 23, and after the bottom of the square steel 22 moves to the inside of the concrete base 21, the bolt 23 is threaded through the inside of the first screw hole 24 and the inside of the second screw hole 25, so that the square steel 22 and the concrete base 21 are connected together.
Referring to fig. 1, the top threaded connection of steel sheet 5 has first expansion bolt 7, first expansion bolt 7 is provided with four, four first expansion bolts 7 are located the top four corners department of steel sheet 5, the lateral wall screw thread of first expansion bolt 7 runs through steel sheet 5 after with the top threaded connection of frame 4, the top threaded connection of steel sheet 5 has second expansion bolt 8, second expansion bolt 8 is provided with two, the axis of frame 4 is the central symmetry and distributes to two second expansion bolts 8, the lateral wall screw thread of second expansion bolt 8 runs through steel sheet 5 after with the top threaded connection of I-shaped steel 6, first expansion bolt 7 is fixed steel sheet 5 and frame 4, second expansion bolt 8 is fixed frame 4 and I-shaped steel 6.
Referring to fig. 2, a sleeve 33 is slidably coupled to an outer sidewall of the steel pipe 32, an inner circumference of the sleeve 33 and an outer Zhou Xiangdeng of the steel pipe 32, a link 35 is fixedly coupled to an outer sidewall of the sleeve 33, and the sleeve 33 and the link 35 couple the four steel pipes 32 together, thereby stably supporting the h-steel 6.
Referring to fig. 2, the outer sidewall of the sleeve 33 is screw-coupled with a first tapping screw 34, the outer sidewall of the first tapping screw 34 is screw-coupled with the outer sidewall of the steel pipe 32, and the first tapping screw 34 is screw-threaded through the outer side of the sleeve 33 and then screw-threaded through the outer side of the steel pipe 32, thereby fixing the sleeve 33 and the steel pipe 32 together.
Referring to fig. 4, the cross section of the square steel 22 is U-shaped, the U-shaped steel 9,U section steel 9 is installed on the outer side wall of the square steel 22, the horizontal steel 10 is connected to the inner side wall of the U-shaped steel 9 in a sliding manner, the second self-tapping screw 11 is connected to the outer side wall of the U-shaped steel 9 in a threaded manner, the second self-tapping screw 11 is used for fixing the U-shaped steel 9 and the horizontal steel 10 together, the outer side wall of the second self-tapping screw 11 is connected to the outer side wall of the horizontal steel 10 in a threaded manner, and the U-shaped steel 9, the horizontal steel 10 and the second self-tapping screw 11 are used for connecting two adjacent square steels 22 with shorter intervals and stably supporting the two sides of the bottom of the outer frame 4.
Referring to fig. 4, the top of the horizontal steel 10 is fixedly connected with the vertical steel 12, the top of the vertical steel 12 is fixedly connected with the mounting plate 13, the mounting plate 13 is located right above the vertical steel 12, the top of the mounting plate 13 is attached to the bottom of the outer frame 4, a third tapping screw 14 is connected to the bottom of the mounting plate 13 through threads, the mounting plate 13 is connected with the outer frame 4 through the third tapping screw 14, the outer side wall of the third tapping screw 14 is connected with the bottom of the outer frame 4 through threads, and the mounting plate 13 is firmly fixed below the outer frame 4 through the third tapping screw 14, so that two sides of the outer frame 4 are further supported.
Working principle: firstly, the concrete pump truck is moved to be close to a building area, concrete is poured on the ground of the building area according to the building area, after the concrete on the ground is solidified, the bottom plate 1 is formed, a prefabricated formwork used for pouring the concrete base 21 is fixed at four corners of the top of the bottom plate 1, meanwhile, the cylindrical prefabricated formwork is placed around the center of the bottom plate 1, then the concrete is poured into the formwork, the first threaded holes 24 are reserved in the formwork, the concrete base 21 with the square hollow inside and the round base 31 with the hollow inside are formed, the square steel 22 is lifted by using a crane, the bottom of the square steel 22 is moved to the inside of the concrete base 21, then the bolts 23 penetrate through the inside of the first threaded holes 24 and the inside of the second threaded holes 25 in a threaded mode, the square steel 22 and the concrete base 21 are connected together, the bottom of the steel pipe 32 is inserted into the inside of the round base 31, the outer frame 4 and the square steel 6 are welded together, the outer frame 4 is moved to be attached to the bottom of the square steel 22 again, the square steel 6 is attached to the top of the steel pipe 32, the square steel 22 is attached to the connecting position, the connecting position is respectively, the square steel 22 is further welded to the top of the square steel 22 and the round steel base 4 and the round base 5, the round steel base 5 is further attached to the bottom of the square steel frame 4 and the round steel 5, the round base 5 is welded to the round steel 5, and the round steel 5 is further, and the round steel 5 is attached to the round frame 5, and the round steel 5 is further, and the round frame 5 is welded to the round bottom of the round steel 5.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (7)
1. The land-saving type construction temporary construction platform comprises a bottom plate (1), and is characterized in that,
the top of the bottom plate (1) is provided with a first supporting component (2) for preliminarily supporting the platform, the first supporting component (2) comprises a concrete base (21) poured at the top of the bottom plate (1), square steel (22) is attached to the inner side wall of the concrete base (21), bolts (23) are connected with the top of the concrete base (21) in a threaded mode, and the bolts (23) penetrate through the outer side of the bottom of the square steel (22) in a threaded mode;
the top of the bottom plate (1) is provided with a second supporting component (3) for further supporting the platform, the second supporting component (3) comprises a round base (31) poured at the top of the bottom plate (1), and the inner bottom wall of the round base (31) is abutted with a steel pipe (32);
the top of square steel (22) is installed frame (4), the inside wall fixedly connected with worker shape steel (6) of frame (4), the bottom of worker shape steel (6) and the top fixed connection of steel pipe (32), the top overlap joint of frame (4) has steel sheet (5), the bottom of steel sheet (5) is laminated with the top of worker shape steel (6).
2. The land-saving type construction temporary building platform according to claim 1, wherein a first threaded hole (24) is formed in the top of the concrete base (21), a second threaded hole (25) is formed in the outer side of the bottom of the square steel (22), and the inner side wall of the first threaded hole (24) and the inner side wall of the second threaded hole (25) are respectively matched with the outer side wall of the bolt (23).
3. The land-saving type construction temporary building platform according to claim 1, wherein a first expansion bolt (7) is connected to the top thread of the steel plate (5), the outer side wall thread of the first expansion bolt (7) penetrates through the steel plate (5) and then is connected with the top thread of the outer frame (4), a second expansion bolt (8) is connected to the top thread of the steel plate (5), and the outer side wall thread of the second expansion bolt (8) penetrates through the steel plate (5) and then is connected with the top thread of the I-shaped steel (6).
4. The land-saving type construction temporary building platform according to claim 1, wherein the outer side wall of the steel pipe (32) is connected with a sleeve (33) in a sliding mode, and the outer side wall of the sleeve (33) is fixedly connected with a connecting rod (35).
5. The land-saving type construction temporary construction platform according to claim 4, wherein the outer side wall of the sleeve (33) is in threaded connection with a first self-tapping screw (34), and the outer side wall of the first self-tapping screw (34) is in threaded connection with the outer side wall of the steel pipe (32).
6. The land-saving type construction temporary building platform according to claim 1, wherein the U-shaped steel (9) is installed on the outer side wall of the square steel (22), the horizontal steel (10) is connected to the inner side wall of the U-shaped steel (9) in a sliding mode, the second self-tapping screw (11) is connected to the outer side wall of the U-shaped steel (9) in a threaded mode, and the outer side wall of the second self-tapping screw (11) is connected with the outer side wall of the horizontal steel (10) in a threaded mode.
7. The land-saving type construction temporary construction platform according to claim 6, wherein the top of the horizontal steel (10) is fixedly connected with a vertical steel (12), the top of the vertical steel (12) is fixedly connected with a mounting plate (13), the top of the mounting plate (13) is attached to the bottom of the outer frame (4), a third self-tapping screw (14) is connected to the bottom of the mounting plate (13) in a threaded manner, and the outer side wall of the third self-tapping screw (14) is connected to the bottom of the outer frame (4) in a threaded manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321218111.0U CN219710912U (en) | 2023-05-19 | 2023-05-19 | Land-saving type construction temporary construction platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321218111.0U CN219710912U (en) | 2023-05-19 | 2023-05-19 | Land-saving type construction temporary construction platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219710912U true CN219710912U (en) | 2023-09-19 |
Family
ID=88004429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321218111.0U Active CN219710912U (en) | 2023-05-19 | 2023-05-19 | Land-saving type construction temporary construction platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219710912U (en) |
-
2023
- 2023-05-19 CN CN202321218111.0U patent/CN219710912U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110387822B (en) | Cast-in-situ bent cap assembly type steel pipe support and construction method thereof | |
| CN105649360A (en) | Integral assembling type building system and installing method | |
| CN101775844A (en) | Connecting joint of ring beam of steel core concrete column used for topdown construction method foundation pit engineering | |
| CN111411687A (en) | A new assembly system | |
| CN217758820U (en) | Special-shaped deep foundation pit structure with limited construction space next to building | |
| CN112575789A (en) | Diagonal space truss foundation pit inner support system | |
| CN115288504A (en) | Construction method of concrete floor on top of large-scale bin body structure | |
| CN217204610U (en) | Low multi-storey support-free prefabricated ultra-high performance concrete frame structure and building | |
| CN212897482U (en) | Construction platform for high-rise building overhanging structural layer | |
| CN113944309A (en) | Cold-formed steel support beam framework and construction method thereof | |
| CN219710912U (en) | Land-saving type construction temporary construction platform | |
| CN212582721U (en) | Bearing platform of tower crane for vertical tower of top plate of foundation garage | |
| CN110306664B (en) | Assembled low-rise residential structure system and construction method thereof | |
| CN217975378U (en) | Cast-in-place board template strutting arrangement of simple beam assembled | |
| CN215887884U (en) | Be applied to bailey frame steel trestle of deep basal pit construction | |
| CN113089499B (en) | Assembled combined support platform for bridge bent cap construction and mounting method thereof | |
| CN201598734U (en) | A Connecting Node of Concrete Steel Tube Column and Ring Beam Used in Foundation Pit Engineering of Upside-Down Method | |
| CN114109075B (en) | Construction method of quickly-installed combined steel ramp | |
| CN216195405U (en) | Assembled concrete beam column connected node | |
| CN213203667U (en) | Supporting structure for post-cast strip-striding temporary lane of top plate of ground depot | |
| CN212927216U (en) | Assembled steel structure foundation of prefabricated cabin transformer substation | |
| CN213682184U (en) | Bolted precast concrete hollow slab bearing platform template | |
| CN210264016U (en) | Assembled antidetonation reinforced structure of brick concrete structure wall body | |
| CN113047306A (en) | Foundation pit supporting system based on splayed I-shaped steel and construction method thereof | |
| CN222314016U (en) | Supporting system in foundation pit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |