CN203741855U - Foundation pit waterproof curtain capable of being repaired manually and with multifunctional coagulation body with quickly hardening silica fume layer and integrating water guiding, discharging and filtering functions - Google Patents
Foundation pit waterproof curtain capable of being repaired manually and with multifunctional coagulation body with quickly hardening silica fume layer and integrating water guiding, discharging and filtering functions Download PDFInfo
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- CN203741855U CN203741855U CN201420073458.5U CN201420073458U CN203741855U CN 203741855 U CN203741855 U CN 203741855U CN 201420073458 U CN201420073458 U CN 201420073458U CN 203741855 U CN203741855 U CN 203741855U
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Abstract
The utility model discloses a foundation pit waterproof curtain capable of being repaired manually and with a multifunctional coagulation body provided with a quickly hardening silica fume layer and integrating water guiding, discharging and filtering functions. The waterproof curtain comprises an overall single-row sealed waterproof curtain body formed by joining adjacent reinforced concrete support piles through primary curtain piles on the inner side wall of a foundation pit and further comprises the multifunctional coagulation body which is arranged below an underground water level and comprises steel chisels, a water filtering layer, a gravel filter layer, a silica fume isolation layer and a silica fume layer, wherein the steel chisels, the water filtering layer, the gravel filter layer, the silica fume isolation layer and the silica fume layer are integrated. The primary curtain piles and the reinforced concrete support piles are connected into a whole or the two primary curtain piles are connected into a whole through the multifunctional coagulation body, and a water guide tube is inserted in the gravel filter layer. The waterproof curtain has water discharging and pressure reducing functions, also has the functions of stopping water, discharging water, lowering water, filtering water, conserving soil and solidifying sand, is easy and convenient to use, practical and economical, guarantees quality and a water stopping effect, and reduces project cost.
Description
Technical field
The utility model belongs to civil engineering underground water leakage preventing structure design field, the underground super Large and Deep Foundation Pit structure side wall water stop curtain structure design of civil engineering of the underground anti-seepages such as particularly underground mineral resources exploitation, Underground Space Resource exploitation, building.The utility model is applicable in fragmentary water-stop curtain sealing its workload that lost efficacy little and lack the assault of speedily carrying out rescue work under the situation of MGJ-50 rig and use.
Background technology
Along with the continuous increase of highrise building, in old urban area, construction adopts well-points dewatering, causes that the phenomenon of adjacent building, pipeline, pavement cracking sinking is of common occurrence.In order to protect groundwater resources, to cut the waste, prevent that the groundwater table decline outside foundation ditch from bringing out relevant geological disaster, to built construction thing, pipeline, pavement of road cause various harm around.Water-stop curtain is the primary measure that foundation pit construction intercepts water from now on, is also the main flow direction of future development.
The underground anti-seepage of the underground mineral resources exploitation of all trades and professions, Underground Space Resource exploitation, municipal engineering, subway engineering, hydraulic structure, super large deep foundation ditch etc. engineering all be unable to do without water-stop curtain.Water-stop curtain is all with deeply stirring or the construction of high-pressure rotary-spray machinery.In recent years, large-scale curtain rig is owing to having mobility strong, transition and advantage easy for installation, used by large and medium-sized basic engineering construction unit, but, the interlock overlapping water-stop curtain that existing large-scale curtain rig is built,, by curtain pile, adjacent steel concrete soldier pile is carried out to interlock overlap joint, between adjacent curtain pile, carry out interlock overlap joint, the water-stop curtain of structure single stake interlock overlapping in aggregates sealing, (in figure, only demonstrate a segment structure of water-stop curtain) as shown in Figure 1a, a circle sidewall of the water-stop curtain composition foundation ditch of this sealing; Wherein, the diameter of the diameter of curtain pile and steel concrete soldier pile is identical or be slightly less than the diameter of steel concrete soldier pile, between two steel concrete soldier piles, spacing is determined by design according to the degree of depth of foundation ditch and size, and between two steel concrete soldier piles, spacing can arrange the curtain pile of one or more mutual overlap joints.For ensureing the safety of foundation ditch, also water-stop curtain is provided with to steel concrete Guan Liang and multiple tracks steel waist rail according to foundation depth and size.Adopt the water-stop curtain of this structure to be excavated in the layer of sand below groundwater table at foundation ditch downwards, between curtain pile 1 and steel concrete soldier pile 2, often can see stake curtain bifurcated and occur cracking 10, (in figure, demonstrate mainly due to curtain pile or soldier pile and be offset to causing bifurcated between curtain pile and soldier pile, bifurcated between curtain pile and curtain pile) as shown in Figure 1 b; Even the seat slump from foundation pit side-wall stake curtain bifurcated gap of the saturated powder fine sand soil in the body of slope falls to pressing to and in hole, gushes sand and turn over current sand, make the stagnant water effect of water-stop curtain not good, even most deep big foundation pits adopt the water-stop curtain of this structure all to occur that sealing lost efficacy, cause foundation pit side-wall quicksand to pour out, directly there is the generation of foundation ditch slope body unstability accident, how repairing this curtain and achieve water stopping function, is that foundation ditch continues the key of excavation downwards.
ZL201320070818.1 " infiltration dipping coacervation body secondary melts the foundation pit waterproof curtain of benefit " is although can melt benefit water-stop curtain, but, it is larger that it is adapted at rich water thick sand bed supporting and protection structure sealing its inside and outside head difference that lost efficacy, under the leak specific environment that longer hydraulic pressure is larger deeply, melt and mend this type of water-stop curtain, in the fertile groove of the complementary paxilla of setting up outside supporting and protection structure, for water-stop curtain, belong to more than supplementary structure, it is a kind of waste, adopting this way sealing at rich water thick sand bed is the way of having no idea, it has sealing and separates the end of keeping away that increases pressure head with draining.For being in the little hole that leaks of non-rich water thin sand and the more hole of fragmentary leakage point and hole, inefficacy water-stop curtain adopts that this technology of ZL201320070818.1 is very uneconomical and the duration is longer.
The weak point of ZL201320070818.1 " infiltration dipping coacervation body secondary melts the foundation pit waterproof curtain of benefit " technology is, complementary paxilla is occupied fertile slot space and occurred that unnecessary use function has increased cost; The infiltration dipping cohesive body being filled in the gap between auxiliary paxilla and soldier pile or between paxilla and cement-soil curtain pile is unnecessary use function and has increased cost of production and material cost.Between hole place after repairing by ZL201320070818.1 patented technology and soldier pile or hole between curtain pile and curtain pile or between soldier pile and curtain pile all not in one plane but at the evagination of an irregular to vertical arc-shaped curved surface in fertile groove.
Even to this day, water-stop curtain is often difficult for playing the effect of complete water proof, for different applicable elements, explore sealing and draining, precipitation, drainage, soil conservation, solid sand facies are combined, and most economical, the most economical, the most economical, the most simple and easy to do way is repaired inefficacy water-stop curtain and is made its sealing be still the technical barrier of a not yet fine solution.
Utility model content
The purpose of this utility model is to provide the multi-functional concrement of a kind of fast hard silicon ash guide drainage and manually repairs foundation pit waterproof curtain, the defect existing in order to solve above-mentioned prior art.
For the weak point that overcomes prior art achieves the above object, technical scheme provided by the utility model is: developed the multi-functional concrement of fast hard silicon ash guide drainage and repaired foundation pit waterproof curtain, the utility model increases multi-functional concrement at the gap location of existing water-stop curtain bifurcated, itself and the curtain body of wall that has bifurcated gap are melted and mend in conjunction with forming the more smooth curtain wall that condenses of complete external surface, and without unnecessary complementary paxilla, there is drainage pressure-reducing function, more there are sealing and draining, precipitation, drainage, soil conservation, Gu sand, economical, material benefit, save money, easy, the functions such as practicality.Be in non-rich water thin sand and more hole and the hole of fragmentary leakage point is little for inefficacy water-stop curtain; the fragmentary water-stop curtain sealing little hole that leaks of its workload of losing efficacy; and under the condition of shortage MGJ-50 rig, assaulting speedily carries out rescue work uses is to gather to imitate very much; not only ensure the quality of curtain; protect the surrounding enviroment of deep foundation ditch, and reduced construction costs.
The multi-functional concrement sectional repair of the fast hard silicon ash guide drainage of the one water-stop curtain of the utility model research and development, this water-stop curtain comprises and is arranged on many of foundation ditch inside wall curtain pile and Duo Gen steel concrete soldier piles first, by curtain pile first by adjacent steel concrete soldier pile overlap joint single sealing water-stop curtain in aggregates, it also comprise be arranged on below groundwater table by drill rod, water-permeable filter layer, rubble filter material layer, silicon ash separation layer and the multi-functional concrement of silicon grieshoch shape all-in-one-piece, described multi-functional concrement is filled up bifurcated gap location between curtain pile first and the steel concrete soldier pile below groundwater table or adjacent two bifurcated gap locations between curtain pile first, by described curtain pile first and steel concrete soldier pile, or described two first curtain pile be connected through multi-functional concrement, in the rubble filter material layer of described multi-functional concrement inside, be fitted with aqueduct, the tube inlet place of described aqueduct one end is set with filter screen, filter screen bundlees by many water guide micropores parcel one deck of aqueduct sidewall and with iron wire, another exposed junction of aqueduct passes in the corresponding space that reaches fertile groove outside multi-functional concrement.
Further, described silicon grieshoch is by the formulated grey agent of siccative powder by a certain percentage of cement and water glass, and layering making is met underground water rapid condensation and formed from building.
Further, described water-permeable filter layer is wrapped up in and is agglomeratingly rammed and be stacked into drill rod outside and be close to the pervious layer in the body of slight slope slope by permeable woven bag, makes its filtering underground, prevents that soil body particle runs off with the husky folder soil of current folder folder mud.
Further, described rubble filter material layer is close to water-permeable filter layer accumulation, and the underground water that disperses seepage flow to flow out from water-permeable filter layer is pooled in rubble filter material layer.
Further, the tube inlet place of described aqueduct one end is also drilled with multiple draining micropores, the number of draining micropore and pore size, the hydraulic slope of the definite permission of the distance of the contiguous building of root Ju and foundation ditch with it corresponding level affects radius is definite, one end is put in rubble filter material layer with the aqueduct of filter screen, disperses the underground water guide that seepage flow flows out to arrive in the fertile groove of foundation ditch being pooled in rubble filter material layer.
Further, the tube wall that described filter screen is arranged on aqueduct is drilled with one end of more draining micropore, and is banded on aqueduct with iron wire.
Further, silicon ash separation layer is arranged between rubble filter material layer and fast hard silicon grieshoch, this separation layer can prevent from being diffused in the underground water in rubble filter material layer after the liquefaction of fast hard silicon ash chance underground water from becoming lixivium, underground water in rubble filter material layer is polluted, and cause the filter screen shutoff of aqueduct water inlet end one end, make water guide disabler, avoided the generation of foundation ditch slope body unstability accident.Be provided with after this filter screen, the underground water in rubble filter material layer muchly can be by strainer filtering out, and the clean water filtering out can export in the fertile groove of foundation ditch swimmingly by aqueduct, successfully discharges underground water.
Adopt technique scheme, feature of the present utility model and beneficial effect:
The utility model is that the sealing of existing water-stop curtain was lost efficacy and transformed, at the gap location of the water-stop curtain bifurcated multi-functional concrement filling-up hole of fast hard silicon ash guide drainage, itself and the curtain body of wall that has bifurcated gap are melted and mend in conjunction with forming a curtain wall that condenses complete and form a vertical facade at the vertical external surface of stake, compared with ZL201320070818.1 patent, hole between hole place after the present invention repairs and soldier pile or between curtain pile and curtain pile or between soldier pile and curtain pile approaches substantially in a vertical plane, can save a lot of cement, and between the hole place of the latter after repairing and soldier pile or hole between curtain pile and curtain pile or between soldier pile and curtain pile all not in one plane, but at the evagination of an irregular to the vertical arc-shaped curved surface in fertile groove, multiplex a lot of cement, extend the duration.And it is attractive in appearance to the utlity model has image, the function of drainage pressure-reducing, more has sealing and draining, precipitation, drainage, soil conservation, solid sand, the function such as simple and practical, but also economic, material benefit, economical.Be in non-rich water thin sand and more hole and the hole of fragmentary leakage point is little for inefficacy water-stop curtain, the fragmentary water-stop curtain sealing little hole that leaks of its workload of losing efficacy, and under the condition of shortage MGJ-50 rig, assaulting speedily carries out rescue work uses is to gather to imitate very much, not only ensure the quality of curtain, ensure the stagnant water effect of water-stop curtain, and reduced construction costs.The guide water of underground water in not only can control effect radius, also can control the vertical sedimentation of adjacent structure and road piping etc. building, is to achieve many things at one stroke.
Brief description of the drawings
Fig. 1 a is existing water-stop curtain cross sectional representation;
Fig. 1 b is the water-stop curtain cross sectional representation losing efficacy;
Fig. 2 a is water-stop curtain of the present utility model longitudinal cross-section schematic diagram;
Fig. 2 b is the structural representation of concrement;
Fig. 2 c is that A-A is to generalized section;
Wherein: 1, curtain pile first; 2, steel concrete soldier pile; 3, drill rod; 4, water-permeable filter layer; 5, rubble filter material layer; 6, silicon grieshoch; 7, aqueduct; 8, filter screen; 9, slight slope slope body; 10, curtain bifurcated gap location; 11, deep foundation ditch; 12, silicon ash separation layer; 71, draining micropore.
Detailed description of the invention
Below in conjunction with brief description of the drawings detailed description of the invention of the present utility model.
The utility model adopts the multi-functional concrement of fast hard silicon ash guide drainage to repair water-stop curtain example structure, as shown in Fig. 2 a, Fig. 2 b and Fig. 2 c, (in figure, only demonstrate a segment structure of water-stop curtain), the water-stop curtain of the present embodiment comprises by many curtain pile 1 and Duo Gen steel concrete soldier piles 2 first, two curtain piles 1 is first set between adjacent steel concrete soldier pile 2, two first between curtain pile 1, interlock overlap joint single sealing water-stop curtain in aggregates between curtain pile 1 and adjacent steel concrete soldier pile 2 first, in the present embodiment, the diameter of steel concrete soldier pile 2 is 600 millimeters, between two steel concrete soldier piles 2, arrange two mutually the diameters of overlap joint be the curtain pile first 1 (the interlock Breadth Maximum 200mm between curtain pile 1 and adjacent steel concrete soldier pile 2 first) of 600 millimeters, it also comprise be arranged on below groundwater table by drill rod 3, water-permeable filter layer 4, rubble filter material layer 5, silicon ash separation layer 12 and the multi-functional concrement of silicon grieshoch 6 shape all-in-one-piece, multi-functional concrement is filled up bifurcated gap location between curtain pile first 1 and the steel concrete soldier pile 2 below groundwater table or adjacent two bifurcated gap locations between curtain pile first, by described curtain pile first and steel concrete soldier pile, or described two first curtain pile be connected through multi-functional concrement, in the rubble filter material layer 4 of described multi-functional concrement inside, be fitted with aqueduct 7, the tube inlet place of aqueduct 7 one end is provided with draining micropore 71, at aqueduct, 7 tube inlet places are set with filter screen 8, the exposed junction of aqueduct 7 passes multi-functional concrement, extend in the corresponding space of fertile groove its underground water guide in the fertile groove of foundation ditch.
This multi-functional concrement is filled up at the bifurcated gap location 10 between curtain pile and steel concrete soldier pile first, or adjacent two bifurcated gap locations 10 between curtain pile first, by described curtain pile first and steel concrete soldier pile, or described two first curtain pile bifurcated gap be connected through the multi-functional concrement of fast hard silicon ash guide drainage.
As shown in Figure 2 c, fast hard silicon ash guide drainage of the present utility model multi-functional concrement is placement layer by layer from the bottom up, first draw hole at the hole place of turning over swelling sand, adjacent cement-soil curtain pile or the adjacent empty both sides mud skin of locating of steel concrete soldier pile are cleaned up with steel brush, and ram downward vertically drill rod in its inboard, plug is rammed wherein by wrapping up in agglomerating permeable woven bag in inboard at drill rod, drill rod gear protects and rams plug and wherein wrap up in agglomerating permeable woven bag and form certain thickness permeable wall, wrapping up in agglomerating permeable woven bag, to form the stable of certain thickness permeable wall be to rely on the drill rod of vertically ramming in stratum to safeguard.Form after permeable Gu Shakongdong, then be close to and wrap up in agglomerating permeable woven bag and form certain thickness permeable wall and pile up rubble filtrate, and will put among the bottom of rubble filtrate with the aqueduct of filter screen.At filtrate macadam and fast hard silicon grieshoch boundary, launch tiling silicon ash separation layer in advance at filtrate rubble sidewall again, this silicon ash separation layer can be cut off expansion when cloth is equally by the vertical paving of figure C curve with woven bag.Again in its surface, the soon hard silicon ash of accumulation, the siccative that the fast hard silicon ash of piling up evenly mixes and stirs into half moisture state by water/binder ratio condenses into rapidly wall and former curtain generation one in hole after layer chance water.When accumulation, adjacent cement-soil curtain pile or the adjacent empty both sides mud skin of locating of steel concrete soldier pile are cleaned up with steel brush, the silicon ash siccative of layer, silicon ash siccative is met underground water and is formed after slurries with adjacent cement-soil curtain pile or adjacent interface, both sides, steel concrete soldier pile cavity and be combined closely.Silicon ash separation layer can prevent that fast hard silicon ash from meeting after underground water liquefaction becomes lixivium and be diffused in the underground water in rubble filter material layer, by shutoff after strainer filtering filter screen, make water guide failure.Be provided with after this filter screen, underground water in rubble filter material layer muchly can be by strainer filtering out, and the clean water filtering out can export in the fertile groove of foundation ditch swimmingly by aqueduct, makes to filter water guide success, otherwise water guide is unsuccessful, Here it is, and maximum of the present utility model is created point.
Bore hole size shape, the size that the filling size of the concrement of the present embodiment and shape and size occur by reality and sporadicly leak source appears in dispersion sealed closely knit filling.And the multi-functional concrement secondary of fast hard silicon ash guide drainage of the present embodiment melts all technical of mending foundation pit waterproof curtain, all exceedes the technical standard that national regulation specifies, all meets design requirement.
Finally it should be noted that, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not departing from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (6)
1. the multi-functional concrement of fast hard silicon ash guide drainage is manually repaired foundation pit waterproof curtain, this water-stop curtain comprises and is arranged on many of foundation ditch inside wall curtain pile (1) and many steel concrete soldier piles (2) first, by curtain pile (1) first, adjacent steel concrete soldier pile (2) is overlapped to single sealing water-stop curtain in aggregates, it is characterized in that: it also comprise be arranged on below groundwater table by drill rod (3), water-permeable filter layer (4), rubble filter material layer (5), silicon ash separation layer (12) and the multi-functional concrement of silicon grieshoch (6) shape all-in-one-piece, described multi-functional concrement is filled up bifurcated gap location between curtain pile first (1) and the steel concrete soldier pile (2) below groundwater table or adjacent two bifurcated gap locations between curtain pile (1) first, by described curtain pile first (1) and steel concrete soldier pile (2), or described two first curtain pile (1) be connected through multi-functional concrement, in the rubble filter material layer (4) of described multi-functional concrement inside, be fitted with aqueduct (7), the tube inlet place of described aqueduct (7) one end is set with filter screen (8), the exposed junction of aqueduct (7) passes outside multi-functional concrement.
2. the multi-functional concrement of fast hard silicon ash guide drainage according to claim 1 is manually repaired foundation pit waterproof curtain, it is characterized in that: described water-permeable filter layer (4) is wrapped up in and agglomeratingly rammed and be stacked into drill rod outside and be close to the pervious layer in slight slope slope body (9) by permeable woven bag, make it filter the underground water in the body of slight slope slope, prevent that soil body particle runs off with current folder is husky.
3. the multi-functional concrement of fast hard silicon ash guide drainage according to claim 1 is manually repaired foundation pit waterproof curtain, it is characterized in that: described rubble filter material layer (5) is close to water-permeable filter layer (4) accumulation, and the underground water that disperses seepage flow to flow out from water-permeable filter layer (4) in slight slope slope body (9) is pooled in rubble filter material layer (5).
4. the multi-functional concrement of fast hard silicon ash guide drainage according to claim 1 is manually repaired foundation pit waterproof curtain, it is characterized in that: the tube inlet place of described aqueduct (7) one end is also drilled with multiple draining micropores, the number of draining micropore and pore size, the hydraulic slope of the definite permission of the distance of the contiguous building of root Ju and foundation ditch with it corresponding level affects radius is definite; One end is put in rubble filter material layer (5) with the aqueduct (7) of filter screen (8), arrives in the fertile groove of foundation ditch being pooled to the underground water that disperses seepage flow to flow out in rubble filter material layer (5) and extending to by aqueduct (7) body guide in the corresponding space of fertile groove.
5. the multi-functional concrement of fast hard silicon ash guide drainage according to claim 1 is manually repaired foundation pit waterproof curtain, it is characterized in that: the tube wall that described filter screen (8) is arranged on aqueduct (7) is drilled with one end of more draining micropore (71), and be banded on aqueduct (7) with iron wire.
6. the multi-functional concrement of fast hard silicon ash guide drainage according to claim 1 is manually repaired foundation pit waterproof curtain, it is characterized in that: described silicon ash separation layer (12) is laid between rubble filter material layer (5) and fast hard silicon grieshoch (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420073458.5U CN203741855U (en) | 2014-02-20 | 2014-02-20 | Foundation pit waterproof curtain capable of being repaired manually and with multifunctional coagulation body with quickly hardening silica fume layer and integrating water guiding, discharging and filtering functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420073458.5U CN203741855U (en) | 2014-02-20 | 2014-02-20 | Foundation pit waterproof curtain capable of being repaired manually and with multifunctional coagulation body with quickly hardening silica fume layer and integrating water guiding, discharging and filtering functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203741855U true CN203741855U (en) | 2014-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420073458.5U Expired - Fee Related CN203741855U (en) | 2014-02-20 | 2014-02-20 | Foundation pit waterproof curtain capable of being repaired manually and with multifunctional coagulation body with quickly hardening silica fume layer and integrating water guiding, discharging and filtering functions |
Country Status (1)
| Country | Link |
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| CN (1) | CN203741855U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111622181A (en) * | 2020-06-09 | 2020-09-04 | 青岛天源伟业保温防水工程有限公司 | Seepage-proofing structure of dam seepage point and construction method thereof |
| CN114411790A (en) * | 2022-02-09 | 2022-04-29 | 深圳百勤建设工程有限公司 | Foundation ditch stagnant water curtain strengthens device |
-
2014
- 2014-02-20 CN CN201420073458.5U patent/CN203741855U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111622181A (en) * | 2020-06-09 | 2020-09-04 | 青岛天源伟业保温防水工程有限公司 | Seepage-proofing structure of dam seepage point and construction method thereof |
| CN114411790A (en) * | 2022-02-09 | 2022-04-29 | 深圳百勤建设工程有限公司 | Foundation ditch stagnant water curtain strengthens device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: BEIJING MODERN JINYU GEOTECHNICAL ENGINEERING CO., Free format text: FORMER NAME: BEIJING MODERN JINYU ENGINEERING CONSTRUCTION CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 100102 Beijing City, Chaoyang District Wangjing Road 48, Jinyu International Building, block A 22 room 2202 Patentee after: BEIJING XIANDAI JINYU ENGINEERING CONSTRUCTION CO., LTD. Address before: 100102 Beijing City, Chaoyang District Wangjing Road 48, Jinyu International Building, block A 22 room 2202 Patentee before: Beijing Xiandai Jinyu Engineering Construction Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20160220 |