CN205636751U - Assembled forming structures system towards secret building of multilayer - Google Patents

Assembled forming structures system towards secret building of multilayer Download PDF

Info

Publication number
CN205636751U
CN205636751U CN201620334120.XU CN201620334120U CN205636751U CN 205636751 U CN205636751 U CN 205636751U CN 201620334120 U CN201620334120 U CN 201620334120U CN 205636751 U CN205636751 U CN 205636751U
Authority
CN
China
Prior art keywords
pile
basement
support
guan liang
row
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
Application number
CN201620334120.XU
Other languages
Chinese (zh)
Inventor
李连祥
李先军
刘兵
王兴政
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong University
Original Assignee
Shandong University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shandong University filed Critical Shandong University
Priority to CN201620334120.XU priority Critical patent/CN205636751U/en
Application granted granted Critical
Publication of CN205636751U publication Critical patent/CN205636751U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses an assembled forming structures system towards secret building of multilayer, including basement outer wall and the basement floor that constitutes cellar structure the fender pile that the two rows of excavation supporting used, the stake of two rows fender piles dislocation cloth, a fender pile is arranged a fender pile from one row the fender pile nearest apart from the basement outer wall to another and is the notch cuttype that risees gradually and struts, is equipped with overhanging support between basement outer wall and one row the fender pile nearest apart from the basement outer wall, and the top of a fender pile is equipped with guan liang, and a fender pile of two rows passes through to be preced with roof beam interconnect. The utility model discloses the foundation ditch realizes that the basement part adopts the fabricated construction on adopting the basis of permanent supporting structure, and on -the -spot construction convenience is swift, and dry mass easily guarantees, can effectively promote production efficiency, and rubbish is construct in the reduction of great degree, can realize that forever changing of supporting construction combines with underground structure's assemblyization, realize architectural structure design and supporting construction design organic unity.

Description

The assembled stereotyped structure system of oriented multilayer hypogee
Technical field
This utility model relates to underground engineering, specifically the assembled stereotyped structure system of oriented multilayer hypogee.
Background technology
In building structure field, precast reinforced concrete structure becomes one of important directions of building structure development, compared to existing Pouring concrete structure, fabricated construction has architecture quality and is prone to ensure, Assembling is convenient and swift, can effectively promote production effect Rate, reduces building waste largely, has preferable economic and environmental benefit.
In base pit engineering especially deep-foundation pit engineering, retaining wall type supporting construction based on support pile is common deep foundation pit support shape One of formula, in conventional building construction design, foundation pit supporting construction is typically considered to provisional working measure, only at Underground Construction Stage plays a role, and just discards underground after foundation ditch backfill, and construction material and social resources are caused waste greatly by this, along with China's building industrialization fast development, support pile is used widely in Deep Foundation Pit Supporting Project, if but can enter these stakes Row utilizes further, then can be greatly saved the energy, additionally, existing basement is built complex, operation is various, it is impossible to have Effect utilizes foundation pit supporting system, and aboveground area is substantially reduced again now, needs to be made full use of the underground space, therefore Need the structure of the basement being provided that speed of application and the saving energy is carried out the most profound research.
Utility model content
For the problems referred to above, in order to solve the deficiencies in the prior art, spy arranges the assembled sizing of a kind of oriented multilayer hypogee Structural system, i.e. excavation slope use notch cuttype supporting based on double prefabricated pile, and by supporting member by supporting construction and master Body structure combines, on this basis the prefabricated construction of realization body building underground structure, by supporting construction permanence and underground Standard combines, formed assembled permanent support structural system, contribute to promote urban underground space towards intensive with Sustainable development.
The assembled stereotyped structure system of oriented multilayer hypogee, including outer wall of basement, the basement floor of basement structure With two row's foundation pit supporting piles, two row's foundation pit supporting piles dislocation lay out pile, support pile from medial branch fender pile to lateral branch fender pile in gradually rising High notch cuttype supporting, is provided with overhanging support between outer wall of basement and support pile, the top of support pile is provided with Guan Liang, two rows' Support pile is connected with each other by Guan Liang;Because of foundation ditch support pile with overhanging support is connected cooperation basement structure formation underground permanent Supporting structure system, and the part that support pile supports as basement, not only achieve the utilization of support pile, and make ground The supporting of lower room is more firm;Meanwhile, stairstepping supporting allows for side slope and controls effect and the mode that arranges.
When using two row's notch cuttype supportings, the most relatively low second row support pile stake top mark height location negative one layer basement floor mark Height, the stake top of second row support pile is connected by Guan Liang, pour with first row support pile pile body outside second row supporting dowel crown beam into Integrally, front two rows support pile is connected with each other by the Guan Liang of second row support pile.
Additionally, the supporting of notch cuttype, formed top half be Single row pillars supporting, the latter half be compound of Double-row Piles Support Protection structure, in the pattern foundation pit supporting structure stage, rear campshed top Guan Liang provides a fulcrum for front pile body of row pile, effectively reduces front-seat support pile Bending, makes full use of the feature that the latter half Retaining Structure with Double-row Piles rigidity is bigger, reduces supporting construction horizontal displacement, increases Add the stability in the large of supporting construction.
Further, in order to realize intensive manufacture, the Guan Liang at lateral branch fender pile top includes that multistage splice sections, every section of Guan Liang are spelled The section of connecing end is provided with the built-in fitting being easy to adjacent Guan Liang splicing, and medial branch fender pile top Guan Liang is cast-in-place part, and built-in fitting can be Being fixed on the steel plate of hat beam sidewall or be preced with the steel plate bottom beam, Guan Liang is after splicing, and steel plate built-in fitting passes through bolt and Guan Liang Connect and realize fastening.
Further, support pile uses concrete precast pile, for pile for prestressed pipe or prestress square pile or prestressing force sheet pile.
Further, outer wall of basement and basement floor all use precoated plate;Because outer wall of basement and basement floor use pre- Making sheet, total not only will not weaken the service life of basement, and substantially reduce the engineering time of basement.
Further, the Guan Liang at the support pile top of lower position pours with adjacent support pile pile body and is integrated.
Further, outside the Guan Liang at lateral branch fender pile top and foundation ditch, concrete construction road pours and is integrated, by construction road Road self severe and and the soil body between friction to first row support pile jacking row anchor, to reduce displacement at pile top.
Further, described overhanging be supported for prefabricated plain concrete support, plain concrete support be positioned at sole plate plane, Support one end is connected with basement bottom board, and one end pours with support pile pile body and is connected, it is also possible to arrange waist rail on pile body, waist rail and The setting of Guan Liang so that be originally mainly evenly distributed on support pile by the power of basement form bracing, and multiple rows of support pile Arrange, effectively prevent stress concentration especially and cause structural damage;Plain concrete supports and is subjected only to axial compressive force, so can be The fertile groove of construction directly pours molding by plain concrete after cleaning out, and support can do beam-like, it is also possible to makes tabular.
Further, the described overhanging prefabricated reinforced concrete that is supported for supports, and overhanging support one end is connected with basement floor, and one End is connected with the Guan Liang at medial branch fender pile top or the pile body of support pile by steel plate or bar built-in fitting;Sum it up, outward Collateral fender pile top Guan Liang is armored concrete prefabricated crown beam, it is possible to use reinforced concrete cast-in-situ Guan Liang;Medial branch fender pile top Guan Liang is reinforced concrete cast-in-situ Guan Liang, it is possible to first use precast reinforced concrete piles splicing, then by pouring coagulation in outside Soil is connected with lateral branch fender pile.
Further, described Guan Liang has the through hole passed for support pile, it is simple to be preferably connected with Guan Liang by prefabricated support pile It is an entirety.
Further, also include the jig for support pile being positioned when support pile is constructed, use H profile steel to be welded into Type.
In this utility model, permanent support structure is by combining foundation pit supporting construction with hypogee agent structure, supporting is tied Allosteric transformation is that a part for agent structure forever plays a role, and can give full play to supporting construction stiffness by itself, effectively reduce basement Exterior wall thickness, on the one hand can effectively reduce construction costs, on the other hand also makes basement structure prefabricated construction be possibly realized, Help lend some impetus to urban underground space construction and put down development towards intensive.
Additionally, the splicing position of component each to foundation ditch top carries out water-proofing treatment, the contact gap such as adjacent Guan Liang uses mortar Floating sealing.
The construction method of structural system, Specific construction step is as follows:
Step 1): construction road outside construct outside foundation ditch edge first row support pile, and construction stake apical cap beam and foundation ditch, shape Become the first rank supporting;
Step 2): second row support pile of constructing inside foundation ditch edge, second row support pile lays out pile with the dislocation of first row support pile, Second row support pile stake top mark height maintains an equal level in first row support pile and with negative one layer basement floorboard height;
Step 3): carry out excavation of foundation pit for the first time, be excavated to second row support pile stake top mark bar position;
Step 4): the stake top cast-in-place hat beam 3 of the second campshed of constructing, form second-order supporting;
Step 5): carrying out second time excavation of foundation pit, be excavated to cheat end designed elevation, the soil body between two campsheds does not excavates;
Step 6): construction main building base structure, pour basement bottom base plate, in basement bottom board 7 and second row supporting Pour plain concrete between Zhuan and support 10;
Step 7): carry out negative two layers of the basement wall prefabricated with install;
Step 8): carry out the prefabricated of negative one layer basement floorboard and the basement wall and install and basement beam column component Pour, precast support is installed between negative one layer basement floorboard and second row support pile stake apical cap beam;
Step 9): execute common outer wall of basement water-proof heat-insulation layer;
Step 10): soil body backfill compaction in layers.
The beneficial effects of the utility model are:
(1), in this utility model, foundation ditch uses notch cuttype supporting based on double prefabricated pile to excavate with classification, has building industrialization Degree is high, site operation is convenient and swift, slope deforming controls the features such as effective.
(2), in this utility model, foundation ditch uses permanent support structure based on double prefabricated pile classification supporting, by by pattern foundation pit supporting structure Structure combines with hypogee agent structure, and the part that supporting construction is changed into agent structure forever plays a role, and can fill Supporting construction stiffness by itself is waved in distribution, effectively reduces outer wall of basement thickness, on the one hand can effectively reduce construction costs, the opposing party Face also makes basement structure prefabricated construction be possibly realized, and helps lend some impetus to urban underground space construction and sends out towards intensive putting down Exhibition.
(3) in this utility model, on the basis of foundation ditch uses permanent support structure, it is achieved basement part uses fabricated construction, Compared to cast-in-place concrete structure, site operation is convenient and swift, and architecture quality is prone to ensure, can effective improving production efficiency, relatively The minimizing building waste of big degree, has preferable economic and environmental benefit.
(4) assemblingization of permanence and underground structure that the system in this utility model can realize supporting construction organically combines, it is achieved Architectural Structure Design and support structure design organic unity, can effectively promote the building industrialization of China, promotes urban underground space Towards intensive and sustainable development.
Accompanying drawing explanation
Fig. 1 is this utility model schematic diagram based on two-layer basement structure.
Fig. 2 is this utility model horizontal profile schematic diagram in first row supporting dowel crown beam position.
Fig. 3 is this utility model horizontal profile schematic diagram in second row supporting dowel crown beam position.
Fig. 4 is first row support pile and the side view being preced with beam rigging position in this utility model.
Fig. 5 is first row support pile and the horizontal sectional drawing being preced with beam rigging position in this utility model.
Fig. 6 is the schematic diagram of this utility model support pile jig.
Fig. 7 is this utility model schematic diagram based on three layers of basement structure.
Each label implication in figure: concrete construction road outside 1-support pile, 2-prefabricated crown beam, 3-cast-in-place Guan Liang, 4-foundation ditch Road, 5-outer wall of basement, 6-basement floor, 7-basement bottom board, 8-outer wall of basement crossbeam, 9-precast support, 10- Plain concrete support, 11-built-in fitting, 12-fender rod installing hole, 13-projection, 14-guard rail, 15-support pile location mould Tool.
Detailed description of the invention
Below in conjunction with Figure of description and specific embodiment, the utility model will be further described:
Embodiment 1
As it is shown in figure 1, the underground structure of this case history is two-layer basement, underground structure composition includes prefabricated outer wall of basement 5, basement floor 6, basement bottom board 7, outer wall of basement crossbeam 8 main member such as grade.
Shown in Fig. 1, the foundation pit supporting construction of this case history is double pile for prestressed pipe notch cuttype supporting construction, mainly includes propping up The main members such as fender pile 1, prefabricated crown beam 2, cast-in-place hat beam 3.
Shown in Fig. 1, in this case history, first row support pile is pile for prestressed pipe, coagulation outside stake top prefabricated crown beam 2 and foundation ditch Soil construction road 4 connect, by construction road self severe and and the soil body between friction to first row support pile jacking row anchor Gu, to reduce displacement at pile top, construction road width meets code requirement.
Shown in Fig. 2, Fig. 4 and Fig. 5, the support pile of adjacent row is connected with each other by Guan Liang, and first row support pile top, outside is preced with Beam 2 is prefabricated components, each prefabricated section be respectively arranged at two ends with protruding 13 and groove, and be provided with steel plate built-in fitting 11, such as Fig. 4 Shown in Fig. 5, adjacent prefabricated crown beam 2 is spliced by protruding 13 grooves, and carries out bolt by steel plate built-in fitting 11 Fixing;Hat back end is reserved with fender rod installing hole 12, can be carried out the installation of guard rail 14 by installing hole.
Shown in Fig. 1, in this case history, second row support pile is pile for prestressed pipe, and stake apical cap beam absolute altitude is first time excavation of foundation pit Depth elevation, approximates negative one layer basement floor absolute altitude, arranges outside twice between second row support pile and outer wall of basement 5 Stretching support, the overhanging reinforced concrete cast-in-situ that is supported for of described agent structure supports, and overhanging support one end leads to steel plate built-in fitting and second Row's support pile pile body or top cast-in-place hat beam 3 connect, and the other end is by reinforcing bar or steel plate built-in fitting and outer wall of basement crossbeam 8 After connection, then being connected with basement floor 6, the overhanging plain concrete that is supported for of described sole plate supports, plain concrete support level In sole plate plane, support one end pours with basement bottom board 7 and is connected, and one end pours with support pile 1 pile body and is connected.
Shown in Fig. 1, in this case history, main building comprises two-layer basement, outer wall of basement 5 and basement floor 6 and is Prefabricated components, basement column and crossbeam all use site concrete, water monoblock type and connect after using each other.
Shown in Fig. 3, in this case history, the dislocation of front two rows support pile lays out pile, and props up with first row outside second row supporting dowel crown beam Fender pile pile body pours and is integrated, and front two rows support pile is connected with each other by the Guan Liang of second row support pile.
Shown in Fig. 1, to carrying out soil body backfill between outer wall of basement and support pile after Underground Construction terminates, backfill the soil body Want compaction in layers.
The construction method of structural system, Specific construction step is as follows:
Step 1): road of constructing outside construct outside foundation ditch edge first row support pile, and construction stake top prefabricated crown beam 2 and foundation ditch Road 4, forms the first rank supporting;
Step 2): second row support pile of constructing inside foundation ditch edge, second row support pile lays out pile with the dislocation of first row support pile; Second row support pile stake top mark height is in first row support pile and the most fair with negative one layer basement floor 6;
Step 3): carry out excavation of foundation pit for the first time, be excavated to second row support pile stake top mark bar position;
Step 4): construction second row support pile top cast-in-place hat beam 3, form second-order supporting;
Step 5): carrying out second time excavation of foundation pit, be excavated to cheat end designed elevation, the soil body between two campsheds does not excavates;
Step 6): pour basement bottom board 7, between basement bottom board 7 and second row support pile, pour plain concrete support 10;
Step 7): construction bottom basement agent structure, including outer wall of basement 5, the prefabricated and installation of basement floor 6, Pouring of basement beam column component;Precast support 9 is installed between bottom basement floor 6 and second row support pile;
Step 8): carry out more last layer basement structure construction successively, including outer wall of basement 5, basement floor 6 prefabricated With installation, pouring of basement beam, post and supporting member, until under ground portion main structure construction terminates;
Step 9): perform outer wall of basement 5 water-proof heat-insulation layer;
Step 10): soil mass of foundation pit backfill compaction in layers.
Support pile 1 work progress, according to support pile 1 size and the position that lays out pile, customization support pile 1 is constructed jig in advance, By mould, stake holes is accurately positioned, and utilizes existing engineering measure to ensure support pile 1 perpendicularity, it is ensured that support pile 1 Construction precision.
Described jig is customized according to concrete engineering, and as shown in Figure 6, employing H profile steel welding fabrication is the most reusable, Owing to die length limits, its sequence of construction fixes mould on request for first, and construction supporting stake 1 in mould in-scope is executed Work terminate after by mould release, and move to next section of construction location and again fix, next group of constructing successively in the new fixed position of mould Support pile 1, pushes ahead construction successively according to support pile sequence of construction, and mould is reclaimed after terminating by construction.
Embodiment 2
The present embodiment with the difference of embodiment 1 is:
The described overhanging prefabricated reinforced concrete that is supported for supports, and overhanging support one end is connected by built-in fitting and the waist rail being located at support pile Connecing, one end is connected with outer wall of basement crossbeam by built-in fitting thus realizes the connection with basement floor, because waist rail is with Guan Liang's Arrange so that be originally mainly evenly distributed on support pile by the power of basement form bracing, and the setting of multiple rows of support pile, Effectively prevent stress concentration especially and cause structural damage.
Embodiment 3
As it is shown in fig. 7, the underground structure of this case history is three layers of basement, its concrete structure and working procedure and and embodiment 1 is similar, and foundation pit supporting construction is staged based on prefabricated pile 1 layering supporting, outer wall of basement 5 and basement floor 6 Being precoated plate, basement beam column component is concrete cast-in-situ component.
As it is shown on figure 3, compared with Example 1, the difference of embodiment 3 is that its underground structure is three layers of basement, Being provided with three roads between protection structure and outer wall of basement altogether to support, support and maintain an equal level with each layer room floorboard, the overhanging support of the bottom depends on Being so that plain concrete supports 10, the overhanging support of upper two-layer is precast support 9.
The foregoing is only preferred embodiment of the present utility model, be not whole embodiment of the present utility model, not in order to Limit this utility model, all within spirit of the present utility model and principle, any modification, equivalent substitution and improvement made Deng, within should be included in protection domain of the present utility model.
In addition to technical characteristic described in description, remaining technical characteristic is all known to a person skilled in the art technology, in order to highlight this reality With novel innovative characteristics, above-mentioned technical characteristic does not repeats them here.

Claims (10)

1. the assembled stereotyped structure system of oriented multilayer hypogee, it is characterized in that, outer wall of basement, basement floor and two row's foundation pit supporting piles including basement structure, two row's foundation pit supporting pile dislocation lay out pile, support pile from medial branch fender pile to lateral branch fender pile in the notch cuttype supporting gradually risen, being provided with overhanging support between outer wall of basement and support pile, the top of support pile is provided with Guan Liang, and the support pile of two rows is connected with each other by Guan Liang;The support pile of adjacent row is connected with each other by Guan Liang, and first row support pile top, outside Guan Liang is prefabricated components, each prefabricated section be respectively arranged at two ends with projection and groove, adjacent prefabricated crown beam is spliced by convex groove.
2. structural system as claimed in claim 1, it is characterised in that the Guan Liang at lateral branch fender pile top includes that multistage splice sections, every section of hat beam splice sections end are provided with the built-in fitting being easy to adjacent Guan Liang splicing, and medial branch fender pile top Guan Liang is cast-in-place part.
3. structural system as claimed in claim 1, it is characterised in that support pile uses concrete precast pile, for pile for prestressed pipe or prestress square pile or prestressing force sheet pile.
4. structural system as claimed in claim 1, it is characterised in that outer wall of basement and basement floor all use precoated plate.
5. structural system as claimed in claim 1, it is characterised in that the Guan Liang at the support pile top of lower position pours with adjacent support pile pile body and is integrated.
6. structural system as claimed in claim 1, it is characterised in that outside the Guan Liang at lateral branch fender pile top and foundation ditch, concrete construction road pours and is integrated.
7. structural system as claimed in claim 1, it is characterised in that described overhanging be supported for prefabricated plain concrete and support, plain concrete supports and is positioned at sole plate plane, supports one end and is connected with basement bottom board, and one end pours with support pile pile body and is connected.
8. structural system as claimed in claim 1, it is characterized in that, the described overhanging prefabricated reinforced concrete that is supported for supports, and overhanging support one end is connected with basement floor, and one end is connected with the Guan Liang at medial branch fender pile top or the pile body of support pile by steel plate or bar built-in fitting.
9. structural system as claimed in claim 1, it is characterised in that described Guan Liang has the hole slot for fixing support pile stake top.
10. structural system as claimed in claim 1, it is characterised in that also include the jig for support pile being positioned when support pile is constructed.
CN201620334120.XU 2016-04-20 2016-04-20 Assembled forming structures system towards secret building of multilayer Active CN205636751U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620334120.XU CN205636751U (en) 2016-04-20 2016-04-20 Assembled forming structures system towards secret building of multilayer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620334120.XU CN205636751U (en) 2016-04-20 2016-04-20 Assembled forming structures system towards secret building of multilayer

Publications (1)

Publication Number Publication Date
CN205636751U true CN205636751U (en) 2016-10-12

Family

ID=57062529

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201620334120.XU Active CN205636751U (en) 2016-04-20 2016-04-20 Assembled forming structures system towards secret building of multilayer

Country Status (1)

Country Link
CN (1) CN205636751U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106638610A (en) * 2017-03-13 2017-05-10 中国建筑第七工程局有限公司 Large-difference staggered connection structure and construction method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106638610A (en) * 2017-03-13 2017-05-10 中国建筑第七工程局有限公司 Large-difference staggered connection structure and construction method thereof

Similar Documents

Publication Publication Date Title
CN101914925B (en) Basement by using optimized composite prefabricated arch wall as external wall
CN105735325B (en) A kind of intensive permanent support assembled basement structure system and construction method
CN201125354Y (en) Steep hill road bed branch block reinforced structure
CN101092850A (en) Method and installation for rising building or historical building / cluster of historical building integrally
CN106088650B (en) A kind of method and building suitable for building with brick-concrete structure underground increasing layer
CN101117805A (en) Underground engineering one-pile multi-use semi reverse construction method
CN109944250B (en) Foundation pit forward and backward combined construction method of non-permanent vertical supporting system
CN210086295U (en) Compound assembled underground structure
CN101614019A (en) The multilayer underground structure next to existing building self-supporting construction method
CN110387889B (en) Multi-arch foundation pit supporting method for strip-shaped deep foundation pit
CN104563130B (en) A kind of cross fender post and the double construction method doing agent structure of space enclosing structure
CN101418569B (en) Optimization complex arch wall combining prefabricated arch leaf, support and major structure
CN104594361A (en) Construction method of H-shaped enclosure pile and enclosure structure as main structure
CN104878776B (en) A kind of underground shallow layer automatic parking garage the library structure
CN206752667U (en) A kind of basement barrier wall structure
CN105421477A (en) Construction method for tower crane foundation
CN111236258A (en) Prefabricated pile wall supporting structure with stiffening rib wall and unloading platform and construction method thereof
CN205636751U (en) Assembled forming structures system towards secret building of multilayer
CN110607800A (en) Turnover type steel open caisson supporting device and construction method thereof
CN205636750U (en) Permanent supporting assembled cellar structure system of intensification
CN107313454B (en) Construction method of underground garage
CN113502835A (en) Wet cellular assembled gridwork roof beam slope protection structure of connecting
CN109723085B (en) Deep foundation pit division construction rib wall support replacing structure and construction method thereof
CN111911168A (en) Construction method of shallow-buried and underground-excavated large-span tunnel and permanent support system
KR20080034424A (en) A constructing method of underground structure with supporting beam for steel pipe

Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model