CN206800371U - Continuous underground wall structure and retaining design - Google Patents
Continuous underground wall structure and retaining design Download PDFInfo
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- CN206800371U CN206800371U CN201720576991.7U CN201720576991U CN206800371U CN 206800371 U CN206800371 U CN 206800371U CN 201720576991 U CN201720576991 U CN 201720576991U CN 206800371 U CN206800371 U CN 206800371U
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- wall structure
- support column
- continuous underground
- cavity
- underground wall
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Abstract
The utility model provides a kind of continuous underground wall structure and retaining design, it is related to underground construction technology field, continuous underground wall structure includes multiple support columns to play a supportive role, multiple position-limited racks for being used to prevent support column relative movement and the capping beam for fixing support column and position-limited rack；Support column is provided with the first cavity of bottom opening, support column and position-limited rack are arranged at intervals and are detachably connected, the second cavity of bottom opening is formed between support column and adjacent position-limited rack, foundation soil is filled with first cavity and the second cavity, capping beam is detachably connected with multiple support columns and multiple position-limited racks.Solve construction of diaphragm wall of the prior art cause reinforcing bar, coagulation soil resource waste and because mud or the earthwork caused by transport transfer construction and caused by the high technical problem of labour cost.
Description
Technical field
Underground construction technology field is the utility model is related to, in particular to a kind of continuous underground wall structure and is gone along with sb. to guard him
System.
Background technology
Diaphram wall is that foundation engineering uses a kind of trench machine on the ground, along all side axis of deep excavation project
Line, under the conditions of mud off, excavate out a long and narrow deep trouth, after clear groove, steel reinforcement cage is hung in groove, then uses tremie method
Underwater concreting with tremie method builds up a unit groove section, so carries out paragraph by paragraph, and continuous reinforced concrete wall together is built up in underground
Wall, as intercept water, antiseepage, load-bearing, water-retaining structure.
The retaining design formed using aforesaid way needs a large amount of reinforcing bars, concrete, but campshed after the completion of basement construction
It is i.e. ineffective, it can not also reclaim, cause greatly to waste；Meanwhile substantial amounts of mud or earthwork production are also had in the process
It is raw, transfer etc. is transported to it and also generates very high labour cost, it is impossible to meets the needs of people.
Utility model content
The purpose of this utility model is to provide a kind of continuous underground wall structure and retaining design, to solve in the prior art
Construction of diaphragm wall cause reinforcing bar, coagulation soil resource waste and because transport transfer construction caused by mud or the earthwork
And cause the high technical problem of labour cost.
The utility model provides a kind of continuous underground wall structure, including multiple support columns to play a supportive role, multiple is used for
Prevent the position-limited rack of the support column relative movement and the capping beam for fixing the support column and the position-limited rack；
The support column is provided with the first cavity of bottom opening, and the support column and the position-limited rack are arranged at intervals, institute
State the second cavity that bottom opening is formed between support column and the adjacent position-limited rack, first cavity and second sky
Intracavitary is filled with foundation soil, and the capping beam is fixedly connected with multiple support columns and multiple position-limited racks.
Further；The support column is the steel pipe of both ends open, and the cross section of the steel pipe is annular.
Further；The position-limited rack is H profile steel, and the H profile steel includes two flange plates arranged in parallel and company
The web of the flange plate is connect, two flange plates are located at the edge of the web homonymy and the lateral wall of the adjacent steel pipe
Abut.
Further；Angle between the inner face adjacent thereto of the end face at the flange plate edge is obtuse angle.
Further；The external diameter of the steel pipe is 800-2000mm, wall thickness 100-250mm.
Further；0.5d ＜ h1＜ d, wherein, h1For the height of the web (22), d is the external diameter of the steel pipe (1).
Further；The height h of the web (22)1=0.8d.
Further；The thickness h of the flange plate (21)2Scope is 100-250mm, the thickness h of the web (22)3Model
Enclose for (1/4-1/3) h2。
Further；The capping beam is made up of concrete, and the lower end of the capping beam is interval with multiple first projections
With the second projection, first projection and second projection are respectively sleeved in first cavity and second cavity.
The utility model also provides a kind of retaining design, including the continuous underground wall structure that multistage is described above, Duo Gesuo
Continuous underground wall structure is stated to join end to end；
Also include conventional shaped steel, it is continuous that the both ends of the conventional shaped steel are respectively fixedly connected with the adjacent or relative underground
Wall construction.
Relative to prior art, the beneficial effect of continuous underground wall structure and retaining design provided by the utility model is such as
Under：
Continuous underground wall structure provided by the utility model includes multiple spaced support columns and position-limited rack, Duo Gezhi
Dagger and multiple position-limited racks form continuous wall shape assembly, and position-limited rack relatively moves for hithermost two support columns, together
When also by capping beam simultaneously be fixedly connected with support column and position-limited rack, to ensure the integrally-built stabilization of wall shape assembly.
Meanwhile during support column and position-limited rack sink to underground, make the first cavity and the second cavity of bottom opening
Interior to be filled with foundation soil, foundation soil further enhancing the support strength of support column and position-limited rack, also by the first cavity and
The setting of two cavitys, reduce the weight of support column and position-limited rack, both can directly sink to underground in ground grading, subtract
Lack the process that grooving is fetched earth, save labour cost.
Also mutually it is detachably connected between support column, position-limited rack and capping beam by setting, completes basement construction
Afterwards, the support column of steel construction and position-limited rack can recycling, avoid the waste of steel.
Retaining design provided by the utility model, after being joined end to end by multistage continuous underground wall structure, pass through conventional type
Steel is fixedly connected with adjacent or relative continuous underground wall structure, after the completion of being constructed in closed area, is not constructed for balancing
Pressure of the foundation soil of side to continuous underground wall structure.In addition, the other technologies advantage of retaining design and above-mentioned underground are continuous
The technical advantage of wall construction is identical, and here is omitted.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Structure after steel pipe and H profile steel are fixed in the continuous underground wall structure that Fig. 1 provides for the utility model embodiment is shown
It is intended to；
Vertical view after steel pipe and H profile steel are fixed in the continuous underground wall structure that Fig. 2 provides for the utility model embodiment is shown
It is intended to；
Fig. 3 is the structural representation of H profile steel in the continuous underground wall structure that the utility model embodiment provides；
Fig. 4 is the structural representation of capping beam in the continuous underground wall structure that the utility model embodiment provides.
Icon：1- steel pipes；2-H shaped steel；The cavitys of 3- first；The cavitys of 4- second；5- capping beams；21- flange plates；
22- webs；The projections of 51- first；The projections of 52- second.
Embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is the utility model part of the embodiment, rather than whole embodiments.Based on the embodiment in the utility model, sheet
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality
Novel protected scope.
, it is necessary to explanation in description of the present utility model, term " " center ", " on ", " under ", it is "left", "right", " perpendicular
Directly ", the orientation of the instruction such as " level ", " interior ", " outer " or position relationship are based on orientation shown in the drawings or position relationship, are only
Described for the ease of description the utility model and simplifying, rather than instruction or imply signified device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.In addition, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint relative importance.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Concrete meaning of the language in the utility model.
Structure after steel pipe and H profile steel are fixed in the continuous underground wall structure that Fig. 1 provides for the utility model embodiment is shown
It is intended to；Vertical view signal after steel pipe and H profile steel are fixed in the continuous underground wall structure that Fig. 2 provides for the utility model embodiment
Figure；Fig. 3 is the structural representation of H profile steel in the continuous underground wall structure that the utility model embodiment provides；Fig. 4 is that this practicality is new
The structural representation of capping beam in the continuous underground wall structure that type embodiment provides.
Embodiment one
As Figure 1-Figure 4, the utility model embodiment provides a kind of continuous underground wall structure, including multiple supports
The support column of effect, multiple position-limited racks for being used to prevent support column relative movement and the pressure for fixing support column and position-limited rack
Back timber 5；Support column is provided with the first cavity 3 of bottom opening, and support column and position-limited rack are arranged at intervals and be detachably connected, and supports
The second cavity 4 of bottom opening is formed between post and adjacent position-limited rack, ground is filled with the first cavity 3 and the second cavity 4
Soil, capping beam 5 are detachably connected with multiple support columns and multiple position-limited racks.
Continuous underground wall structure provided by the utility model includes multiple spaced support columns and position-limited rack, Duo Gezhi
Dagger and multiple position-limited racks form continuous wall shape assembly, and position-limited rack relatively moves for hithermost two support columns, together
When also by capping beam 5 simultaneously be fixedly connected with support column and position-limited rack, to ensure the integrally-built stabilization of wall shape assembly.
Meanwhile during support column and position-limited rack sink to underground, make the first cavity 3 and the second cavity of bottom opening
Foundation soil is filled with 4, foundation soil further enhancing the support strength of support column and position-limited rack, also by the He of the first cavity 3
The setting of second cavity 4, reduce the weight of support column and position-limited rack, both directly can sink to ground in ground grading
Under, reduce the process that grooving is fetched earth, save labour cost.
Also mutually it is detachably connected between support column, position-limited rack and capping beam 5 by setting, completes basement construction
Afterwards, the support column of steel construction and position-limited rack can recycling, avoid the waste of steel.
Specifically, continuous underground wall structure in the present embodiment is described in detail below：
In order to ensure the intensity of support column, as shown in figure 1, it is steel pipe 1 that the present embodiment, which sets support column, specifically, being horizontal stroke
Section is the round steel pipe 1 of annular, its steel design and under the support of foundation soil, be can be good in the first cavity 3
The earthwork of side of preventing from not constructing is caved in；Meanwhile round steel pipe 1 is other shapes of steel pipe 1 (such as square tube) compared to cross section,
In the case that ability longitudinal section area is certain, steel usage amount is less, and then weight is lighter, convenient construction, investment reduction expense.
Further, as shown in figure 3, it is H profile steel 2 that the present embodiment, which sets position-limited rack, it is apparent from, H profile steel 2 includes two mutually
The flange plate 21 and the web 22 of connection flange plate 21 be arrangeding in parallel, by setting two flange plates 21 to be located at the homonymy of web 22
Edge abuts with the lateral wall of adjacent steel pipe 1, multiple steel pipes 1 and H profile steel 2 is mutually abutted and is formed continuous assembly in this way
Afterwards, two flange plates 21 of H profile steel 2 can prevent the steel pipe 1 at both ends from relatively moving, and make under the pressure for the earthwork do not constructed, steel
Pipe 1 will not eject from continuous assembly, ensure that the stabilization of continuous composite unit structure.
Meanwhile H profile steel 2 abutted with steel pipe 1 after formed all round closure the second cavity 4, it is therefore prevented that ground in the second cavity 4
The loss of soil, the gap of the foundation soil or mud of the one end that further it also avoid not constructing between H profile steel 2 and steel pipe 1 are overflowed
It is lost in, ensure that intercepting water for diaphragm wall, antiseepage function.
Further, the angle that the present embodiment is also set up between the end face inner face adjacent thereto at the edge of flange plate 21 is
Obtuse angle.Now, it is that the end face at the edge of flange plate 21 abuts with the lateral surface of steel pipe 1, rather than the end face of flange plate 21 and its phase
The intersecting side of adjacent inner face abuts with the lateral surface of steel pipe 1, ensures that H profile steel 2 and steel pipe 1 sink to underground or extracted from underground
When, the contact portion between H profile steel 2 and steel pipe 1 will not excessive wear.
Further, the steel pipe 1 in the present embodiment is on the basis of Land leveling, is directly sunk to by high-frequency vibratory hammer
Underground, it is necessary to consider caused soil compaction effect therewith during soil layer is squeezed into sinking, soil compaction effect is easily caused neighbouring applied
The steel pipe 1 or H profile steel 2 of work deform, are broken, misplace or floated, and influence the shaping of diaphragm wall.And the power and steel of soil compaction effect
The diameter of pipe 1 and the thickness of tube wall have direct relation, and it is 800-2000mm that the present embodiment, which sets the external diameter of steel pipe 1, and wall thickness is
100-250mm, when the steel pipe 1 in the number range sinks, foundation soil is not the surrounding for being pressed against steel pipe 1, but is squeezed into
In first cavity 3, and the height of foundation soil can be higher than the height that steel pipe 1 sinks in the first cavity 3, reduces the soil compaction of steel pipe 1
Effect, further ensure the stability of continuous composite unit structure.
On the basis of the determination of the external diameter of steel pipe 1,0.5d ＜ h are also set up1＜ d, wherein, h1For the height of web 22, d is steel
The external diameter of pipe 1.The height size of web 22 decides the position that the edge of flange plate 21 contacts with the lateral surface of steel pipe 1, if its height
Too small, then H profile steel 2 spacing steel pipe 1, the stress of steel pipe 1 can not be released easily when excessive well；If it is highly excessive, whole
In assembly, the face of H profile steel 2 do not construct side foundation soil surface area accounting increase, make flange plate 21 by side of not constructing
The bigger pressure of foundation soil, easily deforms flange plate 21, does not also meet the original intention that H profile steel 2 mainly plays position-limiting action.
Preferably, the present embodiment sets the height h of web 221=0.8d, height herein, can H profile steel 2 and steel pipe 1 it
Between play the role of also play spacing steel pipe 1 in the case of slightly gap well, meanwhile, the height of web 22 adds flange plate
21 thickness makes the gross thickness of H profile steel 2 almost identical with the external diameter of steel pipe 1, makes the thickness of the diaphragm wall of shaping almost consistent, protects
Demonstrate,prove the stability of diaphragm wall each position anti-pressure ability.
Further, because the position that H profile steel 2 plays the pressure for supporting side foundation soil of not constructing in the present embodiment is the wing
Listrium 21, in order to ensure the intensity of flange plate 21, the thickness for also setting up flange plate 21 is 100-250mm, simultaneously, it is also considered that arrive
Web 22 is smaller by vertical load herein, in order to further save steel, is ensureing the stable situation of the bulk strength of H profile steel 2
Under, the thickness h of setting web 223Scope is (1/4-1/3) h2, wherein, h2For the thickness of flange plate 21.
Further, as shown in figure 4, capping beam 5 is made up of concrete in the present embodiment, the lower end interval of capping beam 5 is set
There are multiple projections 52 of first projection 51 and second, the first projection 51 and the second projection 52 are respectively sleeved at the first cavity 3 and described
In second cavity 4.
Specifically, being after the completion of steel pipe 1 and H profile steel 2 are fixed, the foundation soil in the first cavity 3 and the second cavity 4 is taken
Go out a part, make reserved a part of space of the first cavity 3 and the second cavity 4, subsequent placing concrete, concrete is filled in
The part of one cavity 3 and the second cavity 4 is the first projection 51 and the second projection 52, and makes the first projection 51 in the case where continuing to pour
An entirety is formed with the second projection 52, the capping beam 5 now formed is further ensured that interfixing for steel pipe 1 and H profile steel 2,
It ensure that the stabilization of continuous underground wall structure.
Embodiment two
The utility model embodiment provides a kind of retaining design, including the continuous underground wall structure that multistage is described above, more
Individual continuous underground wall structure joins end to end；Also include conventional shaped steel, the both ends of conventional shaped steel are respectively fixedly connected with adjacent or relative
Continuous underground wall structure.
The retaining design that the utility model embodiment provides, after being joined end to end by multistage continuous underground wall structure, passes through
Conventional shaped steel is fixedly connected with adjacent or relative continuous underground wall structure, after the completion of being constructed in closed area, for balancing
Do not construct side foundation soil to the pressure of continuous underground wall structure.In addition, the other technologies advantage of retaining design with above-mentionedly
The technical advantage of continuous wall construction is identical down, and here is omitted.
Specifically, the present embodiment is designed retaining design using steel pipe 1 as support column, using H profile steel 2 as position-limited rack,
It is comprised the following steps that：
Marking out first needs the region constructed, then in the region by high-frequency vibratory hammer by steel pipe 1 and H profile steel 2
Designated depth is sunk to successively, wherein, the high-frequency vibrational energy of high-frequency vibratory hammer accelerates soft of soil, reduces steel pipe 1 and H profile steel 2
With the resistance of foundation soil around, efficiency is sunk in raising；During the steel pipe 1 and H profile steel 2 of multiple spaced designs are sunk to, steel pipe 1 and H
Cavity in shaped steel 2 is gradually filled by foundation soil, until sinking to designated depth, all without there is soil spilling, is reduced transport and is turned
The process for moving foundation soil, saves labour cost；Meanwhile H profile steel 2 to steel pipe 1 while play position-limiting action, additionally it is possible to effectively
The foundation soil in cavity is prevented to be lost in.Then, in multiple assemblys (continuous underground wall structure for representing into section setting) head and the tail phase
Neighbour forms on enclosed retaining design and pours capping beam 5, and capping beam 5 is concrete structure, and it fixes steel pipe 1 simultaneously after solidifying
With H profile steel 2, the integrally-built stability of diaphragm wall ensure that；Then, then by conventional shaped steel or concrete-pile removably connect
Adjacent or relative assembly is connect, after ensureing that the foundation soil in closed area is dug out, balances the foundation soil in outside to combination
Pressure caused by body.After the completion of basement construction, conventional shaped steel or concrete-pile, the capping beam 5 of concrete structure are dismantled
It can be removed by percussion vibration from steel pipe 1 and H profile steel 2, now, then extract steel pipe 1 and H types successively by high-frequency vibratory hammer
Steel 2, both are carried out with recovery wait utilization next time after simply maintenance, completes whole work progress.
Above-mentioned adjacent assembly refers to the assembly for forming certain angle around the corner, passes through conventional shaped steel or concrete
After stake connection, ensure that both will not be tilted to construction area under the pressure of the earthwork for side of not constructing.
Further, in order that steel pipe 1 and H profile steel 2 vertically sink to the position specified, the present embodiment is also in S2 steps
Before, ground on the scene is installed with for ensureing that steel pipe 1 and H profile steel 2 vertically sink to the pile frame of underground, meanwhile, it is interval with pile frame
The first through hole that can be passed through for steel pipe 1 and H profile steel 2 and the second through hole, make to sink to underground by first through hole and the second through hole
Steel pipe 1 and H profile steel 2 can mutually abut, be further ensured that the stabilization of composite unit structure.
It is worth mentioning, the present embodiment is primarily adapted for use in the structure that ground is soft sandy soil, and sandstone is mixed with some
Under ground environment, certain abrasion may be caused to steel pipe 1 and the bottom of H profile steel 2, or even difficulty of sinking, in order that this method
The environment of sand stone layer in small, broken bits is also applied for, can be in steel pipe 1 and the sinking watching of H profile steel 2 in the first cavity 3 and the second cavity
Poured water in 4, coordinate high-frequency vibratory hammer further to liquefy sand stone layer in small, broken bits, steel pipe 1 and H profile steel 2 is efficiently quickly sunk to finger
Depthkeeping degree.
Finally it should be noted that：Various embodiments above is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：It can still modify to the technical scheme described in foregoing embodiments, either to which part or whole
Technical characteristic carries out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly
The scope of each embodiment technical scheme of type.
Claims (10)
- A kind of 1. continuous underground wall structure, it is characterised in that including multiple support columns to play a supportive role, it is multiple be used for prevent institute State the position-limited rack of support column relative movement and the capping beam (5) for fixing the support column and the position-limited rack；The support column is provided with the first cavity (3) of bottom opening, and the support column and the position-limited rack are arranged at intervals and can Dismantling connection, the second cavity (4) of bottom opening is formed between the support column and the adjacent position-limited rack, described first is empty It is filled with foundation soil in chamber (3) and second cavity (4), the capping beam (5) and multiple support columns and multiple described Position-limited rack is detachably connected.
- 2. continuous underground wall structure according to claim 1, it is characterised in that the support column is the steel pipe of both ends open (1), the cross section of the steel pipe (1) is annular.
- 3. continuous underground wall structure according to claim 2, it is characterised in that the position-limited rack is H profile steel (2), the H Shaped steel (2) includes two flange plates (21) arranged in parallel and the web (22) of the connection flange plate (21), two institutes State flange plate (21) and be located at the edge of the web (22) homonymy and abutted with the lateral wall of the adjacent steel pipe (1).
- 4. continuous underground wall structure according to claim 3, it is characterised in that the end face at flange plate (21) edge with Angle between its adjacent inner face is obtuse angle.
- 5. continuous underground wall structure according to claim 3, it is characterised in that the external diameter of the steel pipe (1) is 800- 2000mm, wall thickness 100-250mm.
- 6. continuous underground wall structure according to claim 5, it is characterised in that 0.5d ＜ h1＜ d, wherein, h1For the abdomen The height of plate (22), d are the external diameter of the steel pipe (1).
- 7. continuous underground wall structure according to claim 6, it is characterised in that the height h of the web (22)1=0.8d.
- 8. continuous underground wall structure according to claim 3, it is characterised in that the thickness h of the flange plate (21)2Scope For 100-250mm, the thickness h of the web (22)3Scope is (1/4-1/3) h2。
- 9. continuous underground wall structure according to claim 1, it is characterised in that the capping beam (5) is made up of concrete, The lower end of the capping beam (5) is interval with multiple first projections (51) and the second projection (52), first projection (51) and Second projection (52) is respectively sleeved in first cavity (3) and second cavity (4).
- 10. a kind of retaining design, it is characterised in that including diaphram wall knot multistage as described in claim any one of 1-9 Structure, multiple continuous underground wall structures join end to end；Also include conventional shaped steel, the both ends of the conventional shaped steel are respectively fixedly connected with the adjacent or relative diaphram wall knot Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720576991.7U CN206800371U (en) | 2017-05-23 | 2017-05-23 | Continuous underground wall structure and retaining design |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720576991.7U CN206800371U (en) | 2017-05-23 | 2017-05-23 | Continuous underground wall structure and retaining design |
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| Publication Number | Publication Date |
|---|---|
| CN206800371U true CN206800371U (en) | 2017-12-26 |
Family
ID=60742456
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720576991.7U Expired - Fee Related CN206800371U (en) | 2017-05-23 | 2017-05-23 | Continuous underground wall structure and retaining design |
Country Status (1)
| Country | Link |
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| CN (1) | CN206800371U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106968241A (en) * | 2017-05-23 | 2017-07-21 | 浙江省地矿建设有限公司 | Continuous underground wall structure and retaining design construction method |
| CN107675700A (en) * | 2017-09-30 | 2018-02-09 | 中煤地质工程总公司北京分公司 | The construction method of diaphram wall |
-
2017
- 2017-05-23 CN CN201720576991.7U patent/CN206800371U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106968241A (en) * | 2017-05-23 | 2017-07-21 | 浙江省地矿建设有限公司 | Continuous underground wall structure and retaining design construction method |
| CN107675700A (en) * | 2017-09-30 | 2018-02-09 | 中煤地质工程总公司北京分公司 | The construction method of diaphram wall |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20171226 Termination date: 20210523 |