CN212714555U - Mountain area integration steel platform - Google Patents
Mountain area integration steel platform Download PDFInfo
- Publication number
- CN212714555U CN212714555U CN202021142192.7U CN202021142192U CN212714555U CN 212714555 U CN212714555 U CN 212714555U CN 202021142192 U CN202021142192 U CN 202021142192U CN 212714555 U CN212714555 U CN 212714555U
- Authority
- CN
- China
- Prior art keywords
- steel
- mountain area
- steel pipe
- pile foundation
- platform
- 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
Images
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
The utility model belongs to the technical field of the bridge construction, a mountain area integration steel platform is disclosed, adopt the mode of excavation and backfill greatly to establish the construction platform and the problem of the construction cycle length that leads to in the mountain area for the solution. The utility model discloses a mountain area integration steel platform, adopt the pile foundation, the steel pipe stand, preparation such as pipe truss and bailey roof beam forms, the pile foundation is built according to the mountain along mountain area topography, the elevation of pile foundation can follow the mountain area topography and change, the pile foundation both can regard as the support of pipe truss, simultaneously also can regard as the support of portal crane track roof beam, can overcome mountain area precipitous topography and complicated topography landform, make whole steel platform need not carry out the heavy excavation and backfill operation in construction and the manufacturing process, not only reduced the cycle of construction and also helped protecting the original environment of mountain body simultaneously, reduce the destruction to natural environment.
Description
Technical Field
The utility model belongs to the technical field of the bridge construction, concretely relates to mountain area integration steel platform, bridge construction platform promptly, the operations such as decking spelling, member are unloaded, are installed, are deposited and are assembled in advance in the mainly used bridge construction.
Background
The bridge construction relates to a series of construction operations such as installation of hoisting machinery, component unloading, installation, storage and the like, and a bridge construction platform requires enough bearing capacity and stability, can meet construction requirements and provides enough space for carrying out various construction operations.
In the prior art, during the construction of a bridge in a mountain area, a construction mode of large excavation and large backfilling is often adopted for steep slopes (namely, mountain areas with steep slopes) in some mountain areas, so as to provide a construction platform for the bridge construction. However, the construction mode of large excavation and large backfill has the problems that the construction period of the platform is long, the mountain is greatly damaged, and the natural appearance is difficult to recover after the construction is finished.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve and adopt the problem of the construction cycle length that construction platform was established to the mode of excavation and backfill greatly and lead to in the mountain area, and provide a mountain area integration steel platform.
For solving the technical problem, the utility model discloses the technical scheme who adopts is:
the integrated steel platform in the mountainous area is characterized by comprising a pile foundation which is built along the mountainous area terrain, wherein steel pipe vertical columns are arranged on the pile foundation, the steel pipe vertical columns are connected into a whole through transverse connecting pieces and longitudinal connecting pieces, a transverse first distribution beam and a longitudinal first distribution beam are arranged at the tops of the steel pipe vertical columns, the transverse first distribution beam is made of pipe trusses, bailey beams are arranged above the pipe trusses, I-shaped distribution beams are arranged at equal intervals at the tops of the bailey beams, and steel plates are fully paved at the tops of the I-shaped distribution beams; a gantry crane track beam is arranged on a steel pipe upright post corresponding to the designed gantry crane track and a steel plate position corresponding to the steel pipe upright post, and a gantry crane track is arranged on the gantry crane track beam; and a second distribution beam is laid at the position of the bridge deck assembling jig frame designed on the steel plate, and the bridge deck assembling jig frame is welded above the distribution beam.
In some embodiments, a pile foundation platform is arranged on the periphery of the pile foundation, and the steel pipe upright is installed on the pile foundation platform.
In some embodiments, a column base plate is welded at the bottom of the lowermost steel pipe column, and the column base plate is fixedly connected with an embedded anchor bolt of the pile foundation bearing platform, so that the connection between the steel pipe column and the pile foundation bearing platform is realized.
In some embodiments, the steel tube column and the column base bottom plate are connected by a full penetration groove weld.
In some embodiments, the steel pipe upright is provided with a ladder stand, an operating platform and a protective guard.
In some embodiments, the inside of the top of the steel tube column is provided with a steel gasket for the close fit between the steel tube column and the butted steel tube column.
In some embodiments, the cross connectors and the longitudinal connectors are tube trusses.
In some embodiments, the gantry crane rail beam is a box beam.
In some embodiments, the i-shaped distribution beam and the beret beam are connected and fixed through a U-shaped buckle, and the steel plate and the i-shaped distribution beam are fixed through spot welding.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a mountain area integration steel platform, adopt the pile foundation, the steel pipe stand, preparation such as pipe truss and bailey roof beam forms, the pile foundation is built according to the mountain along mountain area topography, the elevation of pile foundation can follow the mountain area topography and change, the pile foundation both can regard as the support of pipe truss, simultaneously also can regard as the support of portal crane track roof beam, can overcome mountain area precipitous topography and complicated topography landform, make whole steel platform need not carry out the heavy excavation and backfill operation in construction and the manufacturing process, not only reduced the cycle of construction and also helped protecting the original environment of mountain body simultaneously, reduce the destruction to natural environment.
The utility model discloses a mountain area integration steel platform adopts the pile foundation as foundation structure, sets up transverse connection spare and longitudinal tie spare between the steel pipe stand to transverse connection spare and longitudinal tie spare all adopt the pipe truss to form the connection system, and horizontal first distribution roof beam and vertical first distribution roof beam are installed at steel pipe stand top, have guaranteed steel platform's security and reliability.
The utility model discloses a building mountain area integration steel platform has satisfied the construction operation under the steep terrain environment in mountain area, reduces girder steel member secondary and transports, for decking spelling welding, member are unloaded, the member is deposited and is pieced together the construction operation in advance and provide the integration platform to adopt full assembled structure, be convenient for install and dismantle, but reuse. Simultaneously the utility model discloses a mountain area integration steel platform has safe and reliable, economical and reasonable's characteristics, can generally be applicable to the construction platform who receives the topography restriction and set up, has great spreading value.
Drawings
Fig. 1 is a schematic diagram of pile foundation arrangement of the integrated steel platform in mountainous area of the present invention, in which a circle represents a pile foundation and a rectangle around the circle represents a pile foundation bearing platform, wherein two adjacent and relatively close pile foundations can share one pile foundation bearing platform 03, that is, two adjacent and relatively close pile foundations construct one pile foundation bearing platform 03 together;
fig. 2 is a schematic cross-sectional view of the present invention, i.e. a schematic cross-sectional view along the width direction of the bridge;
fig. 3 is a schematic cross-sectional view in another direction of the present invention, i.e. along the length direction of the bridge;
FIG. 4 is a schematic top plan view of the mountain area integrated steel platform of the present invention;
the labels in the figure are: 01. the construction method comprises the following steps of bridge location, 02, mountain area integrated steel platform building position, 03, pile foundation bearing platform, 04, steel pipe upright post, 05, transverse connecting piece and longitudinal connecting piece, 06, pipe truss, 07, Bailey beam, 08, I-shaped distribution beam, 08, 09, steel plate, 10, gantry crane track beam, 11, second distribution beam, 12 and bridge deck assembling construction jig frame.
Detailed Description
The present invention will be further described with reference to the following examples, which are only some, but not all, of the examples of the present invention. Based on the embodiments in the present invention, other embodiments used by those skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to the drawings, the mountain area integrated steel platform of the present invention, as shown in fig. 1, wherein a position 02 of the mountain area integrated steel platform is selected near a bridge position 01 and can meet the construction requirements, and then a pile foundation is constructed at the position 02 of the mountain area integrated steel platform, wherein the pile foundation is built along the mountain area, and the elevation of the pile foundation can be changed along the mountain area, the pile foundation is provided with steel pipe columns 04, the steel pipe columns 04 are connected with each other by transverse connectors and longitudinal connectors to form a whole, the top of the steel pipe columns 04 is provided with a transverse first distribution beam and a longitudinal first distribution beam, that is, the first distribution beam arranged at the top of the steel pipe columns 04 comprises the transverse first distribution beam and the longitudinal first distribution beam, wherein the transverse first distribution beam is made of a pipe truss 06, and the longitudinal first distribution beam can also be spliced by the pipe truss 06, the bailey beams 07 are arranged above the pipe trusses 06, preferably, the bailey beams 07 are arranged above the transverse first distribution beams, that is, the bailey beams 07 are arranged above the pipe trusses 06 which are transversely arranged, the h-shaped distribution beams 08 are arranged at equal intervals at the tops of the bailey beams 07, and steel plates 09 are fully paved at the tops of the h-shaped distribution beams 08, wherein, as a preferred mode of the utility model, the steel plates 09 are pattern steel plates; the method comprises the following steps that a gantry crane track beam 10 is arranged on a steel pipe column 04 corresponding to a designed gantry crane track position and a steel plate 09 corresponding to the steel pipe column 04, namely the installation position of the gantry crane track beam 10 just corresponds to a pile foundation, so that the load borne by the gantry crane track beam 10 can be directly transmitted to the steel pipe column 04 along the vertical direction and transmitted to the pile foundation through the steel pipe column 04, a gantry crane track is arranged on the gantry crane track beam 10 and used for bearing a gantry crane and enabling the gantry crane to move on the gantry crane track, and therefore the gantry crane can finish various hoisting operations; a second distribution beam 11 is laid at the location of the bridge deck assembly jig 12 designed on the steel plate 09, and the bridge deck assembly jig 12 is welded above the distribution beam, that is, the location of the bridge deck assembly jig 12 is determined on the steel plate 09, then the second distribution beam 11 is laid at the determined location, and then the bridge deck assembly jig 12 is assembled on the second distribution beam 11.
In some embodiments, a pile foundation platform 03 is arranged on the periphery of the pile foundation, and the steel pipe columns 04 are installed on the pile foundation platform 03.
In some embodiments, a column base plate (not shown in the drawings) is welded to the bottom of the lowermost steel pipe column 04, that is, the lowermost steel pipe column 04 is connected to the pile foundation cap 03 through the column base plate, and the column base plate is fixedly connected to the anchor bolts of the pile foundation cap 03, so that the connection between the steel pipe column 04 and the pile foundation cap 03 is achieved.
In some embodiments, the steel pipe column 04 and the column base bottom plate are connected by a full penetration groove weld, and the fixation of the connection between the steel pipe column 04 and the column base bottom plate is realized by the full penetration groove weld.
In some embodiments, the steel tube column 04 is provided with a ladder stand, an operation platform and a guard rail.
In some embodiments, since the steel tube column 04 is formed by assembling a plurality of steel tube columns, a steel gasket for tightly adhering the steel tube column 04 to the butted steel tube column is disposed inside the top of the steel tube column 04. That is to say when steel pipe stand 04 docks, at first set up the steel lining in the inside of the steel pipe stand of below, then hang the steel pipe stand of top again for can guarantee through the steel lining that the steel pipe stand of top and the steel lining closely laminate, thereby guarantee the straightness that hangs down between the steel pipe stand 04. After the steel pipe stand column is assembled, a jack and wedge iron are needed to be used for perpendicularity and elevation correction so as to ensure that the steel pipe stand column 04 meets the engineering construction requirements. In some embodiments, the steel pipe column is subjected to perpendicularity and elevation correction by using a jack and wedge iron in the construction process, and the steel pipe column at the upper part and the steel pipe column at the lower part are welded and connected in a welding mode after adjustment.
In some embodiments, after the steel liner is installed between the upper steel pipe column and the lower steel pipe column, the upper steel pipe column and the lower steel pipe column are connected and fixed by the positioning code plate, then the verticality and elevation correction is performed by the jack and the wedge iron, and the upper steel pipe column and the lower steel pipe column are welded and connected by a welding mode after the verticality and the elevation correction is performed.
In some embodiments, the transverse connecting members and the longitudinal connecting members are pipe trusses, that is, the steel pipe columns 04 are connected through the pipe trusses, so that the steel pipe columns 04 are connected through the pipe trusses to form a whole, and the stability and the safety of the steel pipe columns are guaranteed. The construction of the pipe trusses and the splicing between the pipe trusses is also within the skill of the art and will be understood and appreciated by those skilled in the art.
In some embodiments, the gantry crane track beam 10 is a box-shaped beam, that is, the gantry crane track 10 is formed by splicing steel structures with box-shaped cross sections, wherein the manufacturing of the box-shaped beam (i.e., the manufacturing of the gantry crane track beam) belongs to the prior art, and mainly comprises the steps of sequentially performing blanking on an upper wing plate, a lower wing plate, a web plate and a rib plate (four corners of the rib plate are ensured to be vertical); a step of welding the upper wing plate and the rib plate (firstly, drawing a position line on the upper wing plate, then primarily fixing the rib plate through electric welding, and finally fully welding, wherein the rib plate is required to be vertical to the upper wing plate); the step of assembling the web (welding the web with the upper wing plate by electric welding, and then welding the web with the rib plate) and the step of assembling the lower wing plate (drawing the position line of the web on the lower wing plate, and then welding the integrated structure of the upper wing plate, the rib plate and the web after welding), can be understood and appreciated by those skilled in the art.
In some embodiments, the i-shaped distribution beam 08 and the beret beam 07 are fixed by U-shaped buckle connection, and the steel plate 09 and the i-shaped distribution beam 08 are fixed by spot welding.
The utility model discloses a mountain area integration steel platform, adopt the pile foundation, the steel pipe stand, preparation such as pipe truss and bailey roof beam forms, the pile foundation is built according to the mountain along mountain area topography, the elevation of pile foundation can follow the mountain area topography and change, the pile foundation both can regard as the support of pipe truss, simultaneously also can regard as the support of portal crane track roof beam, can overcome mountain area precipitous topography and complicated topography landform, make whole steel platform need not carry out the heavy excavation and backfill operation in construction and the manufacturing process, not only reduced the cycle of construction and also helped protecting the original environment of mountain body simultaneously, reduce the destruction to natural environment.
The utility model discloses a mountain area integration steel platform adopts the pile foundation as foundation structure, sets up transverse connection spare and longitudinal tie spare between the steel pipe stand to transverse connection spare and longitudinal tie spare all adopt the pipe truss to form the connection system, and horizontal first distribution roof beam and vertical first distribution roof beam are installed at steel pipe stand top, have guaranteed steel platform's security and reliability.
The utility model discloses a building mountain area integration steel platform has satisfied the construction operation under the steep terrain environment in mountain area, reduces girder steel member secondary and transports, for decking spelling welding, member are unloaded, the member is deposited and is pieced together the construction operation in advance and provide the integration platform to adopt full assembled structure, be convenient for install and dismantle, but reuse. Simultaneously the utility model discloses a mountain area integration steel platform has safe and reliable, economical and reasonable's characteristics, can generally be applicable to the construction platform who receives the topography restriction and set up, has great spreading value.
The utility model discloses a construction method of mountain area integration steel platform mainly includes following step:
(1) firstly, a steel platform building position 02 is selected near a bridge position 01 meeting construction requirements, and the position of a pile foundation is determined.
(2) The construction method comprises the steps of specially designing a pile foundation according to the bearing capacity requirement of the foundation, constructing the pile foundation (wherein the construction of the pile foundation belongs to the prior art and mainly comprises the steps of measuring and paying off, excavating a pile hole, supporting wall templates, pouring retaining wall concrete (or adopting steel retaining walls), installing a reinforcement cage and pouring, and the construction method can be understood and understood by a person skilled in the art and is not repeated herein), constructing a pile foundation bearing platform 03 after the construction of the pile foundation is finished, wherein foundation bolts are embedded in the pile foundation bearing platform 03 in the construction process, and the construction of the pile foundation bearing platform also belongs to the prior art and mainly comprises the steps of bearing platform excavation, foundation pit bottom leveling, template installation and pouring, and is not repeated herein.
(3) The method comprises the following steps that a truck crane is used for installing steel pipe columns 04 and transverse connecting pieces and longitudinal connecting pieces 05 of the steel pipe columns, the steel pipe columns 04, the transverse connecting pieces and the longitudinal connecting pieces 05 are connected through welding, and when the installation height exceeds the hoisting range of the truck crane, the truck crane is moved to the upper side to install the upper steel pipe columns 04; and the steel pipe upright column 04 is provided with a ladder stand, an operating platform and a protective guard.
(4) After the last layer of steel pipe column is installed, installing a longitudinal first distribution beam and a transverse first distribution beam at the top of the steel pipe column 04, wherein the transverse first distribution beam adopts a pipe truss 06 as a distribution beam, a Bailey beam 07 is arranged above the pipe truss 06 (the structure and the assembly mode of the Bailey beam 07 also belong to the prior art, and are not described herein again), I-shaped distribution beams 08 are fully distributed at equal intervals at the tops of the Bailey beams 07, and steel plates 09 are fully distributed at the tops of the I-shaped distribution beams; the I-shaped distribution beam 08 is fixedly connected with the Bailey beam 07 through a U-shaped buckle, and the steel plate 09 is fixed with the I-shaped distribution beam 08 through spot welding.
(5) A gantry crane track beam 10 is arranged on the top of a steel pipe column 04 through which a gantry crane track passes, and the gantry crane track is arranged on the gantry crane track beam.
(6) And pre-paving a second distribution beam 12 at the design position of the bridge deck assembly jig frame, and welding the bridge deck assembly jig frame 12 right above the second distribution beam 12 to meet the integrated construction operation of the steel platform.
Above, without any formal and essential limitations of the invention, it should be pointed out that, for a person skilled in the art, without departing from the method of the invention, several improvements and additions will be possible, which shall also be considered as the scope of protection of the invention. Those skilled in the art can make various changes, modifications and evolutions equivalent to those made by the above-disclosed technical content without departing from the spirit and scope of the present invention, and all such changes, modifications and evolutions are equivalent embodiments of the present invention; meanwhile, any changes, modifications and evolutions of equivalent changes to the above embodiments according to the actual technology of the present invention are also within the scope of the technical solution of the present invention.
Claims (9)
1. The integrated steel platform in the mountainous area is characterized by comprising a pile foundation which is built along the mountainous area terrain, wherein steel pipe vertical columns are arranged on the pile foundation, the steel pipe vertical columns are connected into a whole through transverse connecting pieces and longitudinal connecting pieces, a transverse first distribution beam and a longitudinal first distribution beam are arranged at the tops of the steel pipe vertical columns, the transverse first distribution beam is made of pipe trusses, bailey beams are arranged above the pipe trusses, I-shaped distribution beams are arranged at equal intervals at the tops of the bailey beams, and steel plates are fully paved at the tops of the I-shaped distribution beams; a gantry crane track beam is arranged on a steel pipe upright post corresponding to the designed gantry crane track and a steel plate position corresponding to the steel pipe upright post, and a gantry crane track is arranged on the gantry crane track beam; and a second distribution beam is laid at the position of the bridge deck assembling jig frame designed on the steel plate, and the bridge deck assembling jig frame is welded above the distribution beam.
2. The mountain area integrated steel platform of claim 1, wherein a pile foundation cap is provided at the periphery of the pile foundation, and the steel pipe column is installed on the pile foundation cap.
3. The mountain area integration steel platform of claim 2, wherein, the bottom welding of the steel pipe stand of below has the column base bottom plate, thereby column base bottom plate and pile foundation cushion cap's embedded anchor fixed connection realize the connection of steel pipe stand and pile foundation cushion cap.
4. The mountain area integrated steel platform of claim 3, wherein the steel pipe columns are connected with the column base bottom plate by full penetration groove welds.
5. The mountain area integrated steel platform of claim 1, wherein a steel gasket for tight fitting between the steel pipe column and the butted steel pipe column is provided inside the top of the steel pipe column.
6. The mountain area integrated steel platform of any one of claims 1 to 5, wherein a ladder, an operation platform and a guard rail are mounted on the steel pipe column.
7. The mountain area integrated steel platform of any one of claims 1 to 5, wherein the transverse connectors and the longitudinal connectors are pipe trusses.
8. The mountain area integrated steel platform of claim 7, wherein the gantry crane rail beam is a box beam.
9. The mountain area integrated steel platform of claim 1, wherein the I-shaped distribution beam and the Bailey beam are fixedly connected through a U-shaped buckle, and the steel plate and the I-shaped distribution beam are fixed through spot welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021142192.7U CN212714555U (en) | 2020-06-18 | 2020-06-18 | Mountain area integration steel platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021142192.7U CN212714555U (en) | 2020-06-18 | 2020-06-18 | Mountain area integration steel platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212714555U true CN212714555U (en) | 2021-03-16 |
Family
ID=74960503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021142192.7U Active CN212714555U (en) | 2020-06-18 | 2020-06-18 | Mountain area integration steel platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212714555U (en) |
-
2020
- 2020-06-18 CN CN202021142192.7U patent/CN212714555U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108678751B (en) | Assembly type construction method of shield cutter head manhole by jacking and excavating firstly | |
| CN110847062A (en) | Construction method for whole-hole assembly double-width erection in 80-meter-span wide steel box girder factory | |
| CN103485360A (en) | Steel platform tower crane foundation and construction method thereof | |
| CN109139049B (en) | Construction method for secondary lining buckling arch of underground excavation station of subway | |
| CN108999044A (en) | A kind of modularization subgrade case, steel plank road platform structure and its construction method | |
| CN111622125A (en) | Method for mounting through-type inverted triangular comb-shaped steel pipe arch rib | |
| CN108708727B (en) | Half-excavation rear-jacking shield cutter head manhole assembly type construction method | |
| CN110593269A (en) | Turnover type structure support changing system and construction method thereof | |
| CN212714555U (en) | Mountain area integration steel platform | |
| CN211285624U (en) | Can have enough to meet need formula structure and trade and prop system | |
| CN111851252A (en) | Steel-concrete combined arch bridge crossing karst cave in tunnel and construction method thereof | |
| CN216615527U (en) | Bed-jig is assembled to steel case roof beam | |
| CN113863736B (en) | Construction process of continuous-span common-column C-shaped stock yard | |
| CN213805443U (en) | Steel construction, frame beam structure, side slope reinforced structure and reinforcement and support structure | |
| CN114320388A (en) | Underground excavation large-span station reserved tunnel underpass structure and construction method thereof | |
| CN114108641A (en) | Construction method for common foundation pit of bridge bearing platform and underground structure | |
| CN113931638A (en) | Underground excavation tunnel structure with ultra-close bottom penetrating existing building bottom plate and construction method | |
| CN109798139B (en) | Frame structure suitable for protection of giant karst cave and construction method thereof | |
| CN112177042A (en) | Rail transit station construction method without affecting ground traffic | |
| CN218540351U (en) | Steep terrain tunnel business turn over entrance to a cave mouth steel platform and steel temporary bridge changeover portion connection structure | |
| CN216212364U (en) | Equipment transportation platform for double-containment nuclear power plant and containment system of nuclear power plant | |
| CN218809982U (en) | Gantry crane | |
| CN217678621U (en) | Foundation structure of standard H-shaped steel tower | |
| CN215211138U (en) | Tower crane foundation | |
| CN218712227U (en) | Girder steel landing stage that slides |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |