CN103362522A - Dry powder type synchronous grouting construction technology - Google Patents
Dry powder type synchronous grouting construction technology Download PDFInfo
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- CN103362522A CN103362522A CN201310283260XA CN201310283260A CN103362522A CN 103362522 A CN103362522 A CN 103362522A CN 201310283260X A CN201310283260X A CN 201310283260XA CN 201310283260 A CN201310283260 A CN 201310283260A CN 103362522 A CN103362522 A CN 103362522A
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Abstract
The invention discloses a dry powder type synchronous grouting construction technology which comprises the following steps: producing and preparing dedicated mortar for the dry powder type synchronous grouting; mixing grout on the synchronous grouting construction site; automatically delivering the grout to a shield machine head; carrying out shield excavating synchronous grouting in tunnel construction interspaces; cleaning a stock line and shield grouting equipment. As a dry powder mortar construction is adopted, the grout can be taken and used at random as ' tap water', the operation is convenient, the grout slump constant can be adjusted instantly, the needed grout can be prepared according to various working conditions, and the construction quality is improved; the stock line is integrated, and the automatic grout delivering is realized; the problems of transportation, storage and quality of wet grout are well solved, district limitation is broken through, and the construction technology is suitable for being popularized nationwide and even in a wider range.
Description
Technical field
The present invention relates to a kind of job practices, espespecially a kind of dry-type synchronization slip casting construction technology.
Background technology
Synchronous grouting refers in the Shield Tunneling process, carries out synchronously with shield driving, fills shield tail space by slip casting, to prevent a kind of construction technology of tunnel upward floating.As the important step in the shield method tunnel construction process, with stable, the opposing surrounding soil is out of shape synchronous grouting for the moulding of controlling tunnel duct piece, and the aspects such as water resistance in raising tunnel play very important effect.
All kinds of synchronization slip casting construction technologies of at home and abroad using at present respectively have pluses and minuses, and effect differs, but is the wet pulp grouting process.Wet pulp mostly is building-site and mixes system, and technological process is multifarious, and it is uneven to mix slurrying liquid quality, and the construction accident that causes thus emerges in an endless stream especially, and the control effect of later stage tunnel upward floating is also troubling; And wet pulp needs memory device, uses inconvenience.If adopt the construction technology of premixing wet pulp, then cost of transportation is high.
Summary of the invention
The object of the invention is to overcome defects, a kind of dry-type synchronization slip casting construction technology is provided, adopts dry powder and mortar, easy to operate, slurries as " tap water " with getting with usefulness, the slurries slump is immediately adjustable, can make required slurries according to different operating modes, and is uniform and stable, construction quality also can be improved, and the silo grout outlet has been realized the automation that slurries are carried to the stock line integrated arrangement of shield machine head, and is easy and simple to handle; This external enwergy solves transportation, storage and the quality problems of wet pulp well, can break through geological restraint, and is suitable for promoting in nationwide and even wider scope.
In order to realize the foregoing invention purpose, the technical solution adopted in the present invention is:
A kind of dry-type synchronization slip casting construction technology is characterized in that: may further comprise the steps:
A, manufacture dry-type synchronous grouting dedicated mortar step;
The slurries of B, synchronous grouting job site are mixed step processed;
C, slurries automation are delivered to shield machine head step;
D, shield driving synchronous grouting step is carried out in the tunnel construction space;
E, cleaning stock line and shield grouting device step.
The manufacture dry-type synchronous grouting dedicated mortar step of above-mentioned steps A further comprises:
(1) determines dry powder synchronous grouting dedicated mortar fit quality percentage;
Flyash 18%-21%, calcium-base bentonite 3.5-4.0%, slaked lime 2.5-5.0%, special-purpose dry-type Admixture 0.12%-0.18%, sand 70%-76%; All material is pulverulent material;
Wherein the fit quality percentage of special-purpose dry-type Admixture is: methyl cellulose ether 0.9%～1.3%, naphthalene water reducer 29.2%～39.2%, Escin 0.5%～0.9%, sodium bentonite 29%～45%; Slaked lime 22～32%; All material is pulverulent material;
Described methyl cellulose ether is 20000-60000 viscosity, mainly plays water retention, can greatly improve pumpability and the work persistence of slurries;
Described naphthalene water reducer can reduce water supply volume, improves serum density and then improve its water proofing property for having the surface-active effect;
Wherein the mass ratio of methyl cellulose ether and naphthalene water reducer is 1:30-1:35, and both mixing of both mixing have the stack humidification, can effectively strengthen water retention, workability, glutinous poly-property, pumpability and work persistence;
Described Escin is air entraining agent, and it is cheap, and bleed is even, can improve flowability and the pumpability of slurries, but volume should all controls, and crossing conference has adverse effect to performances such as the density of slurries, intensity;
Described sodium bentonite fineness≤20% has good pulping performance, can improve the properties of calcium-base bentonite, and it mixes the effect of mainly playing sliding agent and thixotropic agent, increases flowability and the pumpability of slurries, improves its workability; Can also play in addition the effect of thickener, improve the denseness of slurries and then improve its anti-shearing yield strength;
Described slaked lime, its (CaO+MgO) content 〉=60%, specific area 〉=400m
2/ Kg.Slaked lime mix the activity that can excite grey matter material in volcano in the mortar, make slurries obtain certain mechanical property;
(2) with sand dry powder and mortar stirring system relevant device is cleaned one time, guarantee free from admixture, especially cement can not be arranged;
(3) with above-mentioned various raw material stoving to moisture content less than 1%;
(4) be the screen cloth of 5mm with sand by sieve diameter, screen out the above particle of 5mm;
(5) preparation of special-purpose dry-type Admixture, its step is as follows
(5.1) with various raw material stoving to moisture content less than 1%;
(5.2) take by weighing respectively methyl cellulose ether and Escin by prescription, adopt agravic formula agitating mode to stir and obtain the first mixture;
(5.3) take by weighing naphthalene water reducer by prescription, mix in the first mixture that step (5.2) obtains, adopt agravic formula agitating mode to stir and obtain the second mixture;
(5.4) take by weighing respectively sodium bentonite and slaked lime by prescription, adopt agravic formula agitating mode to stir and obtain the 3rd mixture;
(5.5) the second mixture that step (5.3) is obtained mixes in the 3rd mixture that step (5.4) obtains, and adopts agravic formula agitating mode to stir and obtains 4 mixture;
(5.6) use at last sealing bag the 4 mixture of step (5.5) gained dress bag, namely get the special-purpose dry-type Admixture of described synchronous grouting;
(6) take by weighing respectively calcium-base bentonite, slaked lime, special-purpose dry-type Admixture by prescription, adopt agravic formula agitating mode stirring to obtain first in 10 seconds-15 seconds and stir the mixture;
(7) then take by weighing flyash by prescription, what be added into that step (6) obtains first stirs the mixture, and adopts agravic formula agitating mode to stir to obtain second in 10 seconds-15 seconds to stir the mixture;
(8) take by weighing sand by prescription at last, what be added into that step (7) obtains second stirs the mixture, and adopts agravic formula agitating mode to stir 20 seconds-30 seconds, gets described dry-type synchronous grouting dedicated mortar.
The slurries of above-mentioned steps B synchronous grouting job site are mixed step processed, further comprise:
(1) places the special-purpose silo of band metering mixing plant on the ground of shield synchronization slip casting job site, and connect water power;
(2) be transported to the job site with powder material tank handlebar dry-type synchronous grouting dedicated mortar, and be pumped in the silo;
(3) according to construction stage, soil layer geological condition, choose the slump of the used slurries of synchronous grouting;
(4) require the slump according to slurries, set the initial water amount;
The slurries slump requires at 120mm-200mm, and water supply volume is generally the 15-18% of siccative, the every increase of slump 20mm, initial water amount setting value increases the mass percent calculating that 1%(presses dry mash);
(5) open silo blanking switch and send taps, silo mixing plant to begin to stir;
(6) open silo pulp switch, slurries are carried out the slump, the test of pressure bleeding quantity;
When slump value and required value difference at ± 20mm during with interior, pressure bleeding quantity＜30ml, sustainable spice; Otherwise the regulating capacity setting value meets the demands slurries, can continue the spice discharging.
The automation of above-mentioned steps C slurries is delivered to shield machine head step, further comprises:
(1) begins to the shield machine head from the silo grout outlet, arrange the slurries conveyance conduit of drive;
The silo grout outlet arranges horizontal pipe to the active well ground segment, and the pipeline initial end need be settled the pumping propulsion plant, promotes power and determines according to the distance of grout outlet and active well;
Active well ground arranges vertical pipe or tilted tube to underground section, if vertical pipe is set, the per 30 meters need of the underground degree of depth arrange one section horizontal pipe;
Active well ground arranges horizontal pipe down to shield machine head section along the tunnel trend, and the underground initial end of active well need be settled the pumping propulsion plant, promotes power and determines according to the distance of active well and shield machine head;
(2) with tap water stock line is lubricated;
Pour water from grout outlet end pipeline opening, to shield machine head end pipeline opening water outlet 5min, stop to pour water; (3)
Respectively the pipe ends mouth is connected to silo grout outlet, shield machine grouting equipment;
(4) open pipeline pumping propulsion plant, mortar is transported to shield machine head under the active well, for constructing.
The obvious advantage of implementing after this technology with effect is: compare with existing synchronous grouting technique, the present invention is owing to adopted dry powder and mortar, easy to operate, slurries as " tap water " with getting with usefulness, and uniform and stable, have good flowability, fillibility, water retention, slump retaining and anti-shearing yield strength, have good lasting workability in storage and course of conveying, workability is better; And the slurries slump is immediately adjustable, can satisfy the various unusual conditions in the construction demand of the shield synchronization slip casting under the different operating modes, the in time reply construction, thereby more effectively prevents the come-up in tunnel; Pipeline one from the silo grout outlet to the shield machine head is arranged, has realized the automation that slurries are carried, and is easy and simple to handle; In addition, the present invention can solve transportation and the production capacity problem of wet pulp well, has broken through regional limits, is suitable for inside and outside Shanghai City and even nationwide popularization.
The specific embodiment
Below in conjunction with instantiation, the present invention is further described:
The subway tunnel of certain shield-tunneling construction adopts dry-type synchronization slip casting construction technology of the present invention, adopts following steps:
1. at first, produce dry-type synchronous grouting dedicated mortar;
1.1 determine dry powder synchronous grouting dedicated mortar match ratio;
Flyash 20%, calcium-base bentonite 3.85%, slaked lime 3.0%, special-purpose dry-type Admixture 0.15%, sand 73%.
All material is pulverulent material, by percentage to the quality;
Wherein the fit quality percentage of special-purpose dry-type Admixture is: methyl cellulose ether 1.1%, naphthalene water reducer 33.2%, Escin 0.7%, sodium bentonite 35%, slaked lime 30%;
Used methyl cellulose ether is CMC ether, viscosity 40000;
Used naphthalene water reducer is technical grade;
Wherein the mass ratio of methyl cellulose ether and naphthalene water reducer is 1:30.2;
Used Escin is technical grade;
The fineness of used sodium bentonite is 18%;
Used slaked lime powder, (CaO+MgO) % is 68%, specific area 420m
2/ Kg.
1.2 clean dry powder and mortar stirring system relevant device with sand;
1.3 with above-mentioned various raw material stoving to moisture content less than 1%;
1.4 be the screen cloth of 5mm with sand by sieve diameter, screen out the above particle of 5mm;
1.5 the preparation of special-purpose dry-type Admixture, its step is as follows:
1.5.1 take by weighing respectively 1 ton of methyl cellulose ether and Escin that special-purpose dry-type Admixture is required by prescription, adopt agravic formula agitating mode to stir and obtain the first mixture;
1.5.2 take by weighing the required naphthalene water reducer of the special-purpose dry-type Admixture of 1 ton of synchronous grouting by prescription, mix in the first mixture that step (1.5.1) obtains, adopt agravic formula agitating mode to stir and obtain the second mixture;
1.5.3 take by weighing respectively required sodium bentonite and the slaked lime of the special-purpose dry-type Admixture of 1 ton of synchronous grouting by prescription, adopt agravic formula agitating mode to stir and obtain the 3rd mixture;
1.5.4 the second mixture that step (1.5.2) is obtained mixes in the 3rd mixture that step (1.5.3) obtains, and adopts agravic formula agitating mode to stir and obtains 4 mixture;
(1.5.5) use at last sealing bag that the 4 mixture of above-mentioned steps (1.5.4) gained is pressed the every packed bag of 40Kg/, namely get the special-purpose dry-type Admixture of described tunnel synchronous grouting.
1.6 take by weighing respectively calcium-base bentonite, slaked lime, special-purpose dry-type Admixture by prescription, adopt agravic formula agitating mode stirring to obtain first in 12 seconds and stir the mixture;
1.7 then take by weighing flyash by prescription, what be added into that step 1.6 obtains first stirs the mixture, and adopts agravic formula agitating mode to stir to obtain second in 12 seconds to stir the mixture;
1.8 take by weighing sand by prescription at last, what be added into that step 1.7 obtains second stirs the mixture, and adopts agravic formula agitating mode to stir 25 seconds, gets described dry-type synchronous grouting dedicated mortar;
2. the slurries that then, carry out in the synchronous grouting job site are mixed system;
2.1 place the special-purpose silo of band metering mixing plant on ground, building site, and connect water power;
2.2 be transported to the job site with powder material tank handlebar dry-type synchronous grouting dedicated mortar, and be pumped in the silo;
2.3 according to construction stage, soil layer geological condition, the slump of choosing the used slurries of synchronous grouting is 160mm;
2.4 require the slump according to slurries, setting the initial water amount is 16%;
2.5 open silo blanking switch and send taps, silo mixing plant to begin to stir;
2.6 open silo pulp switch, slurries are detected, the slump is 170mm, and the pressure bleeding quantity is 22ml, and size performance meets the requirements, and sustainable spice is so fixedly water supply volume sets value.
3. then, the slurries automation is delivered to the shield machine head;
3.1 begin to the shield machine head from the silo grout outlet, arrange the slurries conveyance conduit of drive;
The silo grout outlet arranges 5 meters horizontal pipes to the active well ground segment, and settles pump motor, power of motor 15kw in the pipeline initial end;
Active well ground arranges 12 meters vertical pipes to underground section;
Active well ground arranges 20 meters horizontal pipes down to shield machine head section along the tunnel trend, and the underground initial end of active well is settled pump motor, power of motor 20kw;
3.2 with tap water stock line is lubricated, fill with tap water from grout outlet end pipeline opening, to shield machine head end pipeline opening water outlet 5min, stop to pour water;
3.3 respectively the pipe ends mouth is connected to silo grout outlet, shield machine grouting equipment;
3.4 open pipeline pumping propulsion plant, mortar be transported to shield machine head under the active well, for constructing.
4. then, the shield driving synchronous grouting is carried out in the tunnel construction space, the slip casting process is smooth, occurs without obstruction, interruption situation;
5. last, after this time slip casting finishes, clean stock line and shield grouting equipment.
Adopt the constructing tunnel of dry-type synchronization slip casting construction technology of the present invention smooth, effect is good, sees from the Ground Subsidence Monitoring data and can control preferably the tunnel upward floating distortion.
It is as follows that the synchronous grouting dedicated mortar specifically detects index:
1, the initial slump is 210mm ± 5mm, and 2 hours slumps are 200mm ± 5mm, and 4 hours slumps are 190mm ± 5mm, (it is 5mm that slump value changes least unit)
2, the slurry apparent density is 2.0-2.1g/cm
3
3, pressure bleeding value is 15ml---between the 35ml
4,20 hours shear yield strengths are 900---1600Pa.
5, sedimentation value is 5mm-9mm.
Claims (8)
1. dry-type synchronization slip casting construction technology is characterized in that: may further comprise the steps:
A. manufacture dry-type synchronous grouting dedicated mortar step;
B. the slurries of synchronous grouting job site are mixed step processed;
C. the slurries automation is delivered to shield machine head step;
D. shield driving synchronous grouting step is carried out in the tunnel construction space;
E. clean stock line and shield grouting device step.
2. a kind of dry-type synchronization slip casting construction technology according to claim 1, it is characterized in that: described manufacture dry-type synchronous grouting dedicated mortar step further comprises the steps:
(1) determines that dry powder synchronous grouting dedicated mortar match ratio is: flyash 18%-21%, calcium-base bentonite 3.5-4.0%, slaked lime 2.5-5.0%, special-purpose dry-type Admixture 0.12%-0.18%, sand 70%-76%; All material is pulverulent material, by percentage to the quality;
Wherein, special-purpose dry-type Admixture match ratio is:: methyl cellulose ether 0.9%～1.3%, naphthalene water reducer 29.2%～39.2%, Escin 0.5%～0.9%, sodium bentonite 29%～45%; Slaked lime 22～32%; All material is pulverulent material, by percentage to the quality;
Described methyl cellulose ether is 20000-60000 viscosity;
Described sodium bentonite fineness≤20%;
Described slaked lime, the content of its CaO+MgO 〉=60%, specific area 〉=400m
2/ Kg;
(2) with sand dry powder and mortar stirring system relevant device is cleaned one time, guarantee free from admixture, especially cement can not be arranged;
(3) with above-mentioned various raw material stoving to moisture content less than 1%;
(4) be the screen cloth of 5mm with sand by sieve diameter, screen out the above particle of 5mm;
(5) the special-purpose dry-type Admixture of preparation, its step is as follows:
(5.1) with various raw material stoving to moisture content less than 1%;
(5.2) take by weighing respectively methyl cellulose ether and Escin by prescription, adopt agravic formula agitating mode to stir and obtain the first mixture;
(5.3) take by weighing naphthalene water reducer by prescription, mix in the first mixture that step (5.2) obtains, adopt agravic formula agitating mode to stir and obtain the second mixture;
(5.4) take by weighing respectively sodium bentonite and slaked lime by prescription, adopt agravic formula agitating mode to stir and obtain the 3rd mixture;
(5.5) the second mixture that step (5.3) is obtained mixes in the 3rd mixture that step (5.4) obtains, and adopts agravic formula agitating mode to stir and obtains 4 mixture;
(5.6) use at last sealing bag the 4 mixture of step (5.5) gained dress bag, namely get the special-purpose dry-type Admixture of described synchronous grouting;
(6) take by weighing respectively calcium-base bentonite, slaked lime, special-purpose dry-type Admixture by prescription, adopt agravic formula agitating mode stirring to obtain first in 10 seconds-15 seconds and stir the mixture;
(7) then take by weighing flyash by prescription, what be added into that step (6) obtains first stirs the mixture, and adopts agravic formula agitating mode to stir to obtain second in 10 seconds-15 seconds to stir the mixture;
(8) take by weighing sand by prescription at last, what be added into that step (7) obtains second stirs the mixture, and adopts agravic formula agitating mode to stir 20 seconds-30 seconds, gets described dry-type synchronous grouting dedicated mortar.
3. a kind of dry-type synchronization slip casting construction technology according to claim 2, it is characterized in that: described special-purpose dry-type Admixture, wherein the mass ratio of methyl cellulose ether and naphthalene water reducer is 1:30-1:35.
4. a kind of dry-type synchronization slip casting construction technology according to claim 1, it is characterized in that: the slurries of described synchronous grouting job site are mixed step processed, further comprise the steps:
(1) places the special-purpose silo of band metering mixing plant on the ground of shield synchronization slip casting job site, and connect water power;
(2) be transported to the job site with powder material tank handlebar dry-type synchronous grouting dedicated mortar, and be pumped in the silo;
(3) according to construction stage, soil layer geological condition, choose the slump of the used slurries of synchronous grouting;
(4) require the slump according to slurries, set the initial water amount;
(5) open silo blanking switch and send taps, silo mixing plant to begin to stir;
(6) open silo pulp switch, slurries are carried out the slump, the test of pressure bleeding quantity, to determine slurries quality and water supply volume setting value.
5. a kind of dry-type synchronization slip casting construction technology according to claim 4, it is characterized in that: described according to the slurries requirement slump, setting the initial water amount refers to: the slurries slump requires at 120mm-200mm, water supply volume is generally the 15-18% of siccative, the every increase of slump 20mm presses the mass percent of dry mash and calculates initial water amount setting value increase by 1%.
6. a kind of dry-type synchronization slip casting construction technology according to claim 4, it is characterized in that: before constructing behind the described slurry agitation, need to slurries carry out the slump, the test of pressure bleeding quantity refers to: when slump value and required value difference at ± 20mm during with interior, pressure bleeding quantity＜30ml, sustainable spice; Otherwise the regulating capacity setting value meets the demands slurries, can continue the spice discharging.
7. a kind of dry-type synchronization slip casting construction technology according to claim 1, it is characterized in that: described slurries automation is delivered to shield machine head step, also further comprises the steps:
(1) begins to the shield machine head from the silo grout outlet, arrange the slurries conveyance conduit of drive;
(2) with tap water stock line is lubricated;
Pour water from grout outlet end pipeline opening, to shield machine head end pipeline opening water outlet 5min, stop to pour water;
(3) respectively the pipe ends mouth is connected to silo grout outlet, shield machine grouting equipment;
(4) open pipeline pumping propulsion plant, mortar is transported to shield machine head under the active well, for constructing.
8. a kind of dry-type synchronization slip casting construction technology according to claim 7 is characterized in that: describedly begin to the shield machine head from the silo grout outlet, arrange the slurries conveyance conduit of drive, specific requirement is as follows:
The silo grout outlet arranges horizontal pipe to the active well ground segment, and the pipeline initial end need be settled the pumping propulsion plant, promotes power and determines according to the distance of grout outlet and active well;
Active well ground arranges vertical pipe or tilted tube to underground section, if vertical pipe is set, the per 30 meters need of the underground degree of depth arrange one section horizontal pipe;
Active well ground arranges horizontal pipe down to shield machine head section along the tunnel trend, and the underground initial end of active well need be settled the pumping propulsion plant, promotes power and determines according to the distance of active well and shield machine head.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310283260.XA CN103362522B (en) | 2013-07-08 | 2013-07-08 | A kind of dry-type synchronization slip casting construction technology |
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| CN201310283260.XA CN103362522B (en) | 2013-07-08 | 2013-07-08 | A kind of dry-type synchronization slip casting construction technology |
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| CN103362522B CN103362522B (en) | 2016-05-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107151122A (en) * | 2017-05-25 | 2017-09-12 | 上海隧道工程有限公司 | Dry powder and mortar mixing method for shield grouting |
| CN107939630A (en) * | 2017-12-14 | 2018-04-20 | 中交第二公路勘察设计研究院有限公司 | One kind pumping bentonitic device of particle |
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| JPH0631538B2 (en) * | 1988-02-08 | 1994-04-27 | 鹿島建設株式会社 | Stabilizer used for shield method |
| CN101737064A (en) * | 2008-11-20 | 2010-06-16 | 中铁十六局集团有限公司 | Shield synchronous grouting serous fluid |
| CN102758641A (en) * | 2012-08-01 | 2012-10-31 | 上海城建（集团）公司 | Construction method for ultralarge-diameter shield synchronous grouting |
| CN103102129A (en) * | 2013-02-25 | 2013-05-15 | 黑龙江省交通科学研究所 | Air entrained concrete |
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2013
- 2013-07-08 CN CN201310283260.XA patent/CN103362522B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0631538B2 (en) * | 1988-02-08 | 1994-04-27 | 鹿島建設株式会社 | Stabilizer used for shield method |
| CN101737064A (en) * | 2008-11-20 | 2010-06-16 | 中铁十六局集团有限公司 | Shield synchronous grouting serous fluid |
| CN102758641A (en) * | 2012-08-01 | 2012-10-31 | 上海城建（集团）公司 | Construction method for ultralarge-diameter shield synchronous grouting |
| CN103102129A (en) * | 2013-02-25 | 2013-05-15 | 黑龙江省交通科学研究所 | Air entrained concrete |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107151122A (en) * | 2017-05-25 | 2017-09-12 | 上海隧道工程有限公司 | Dry powder and mortar mixing method for shield grouting |
| CN107939630A (en) * | 2017-12-14 | 2018-04-20 | 中交第二公路勘察设计研究院有限公司 | One kind pumping bentonitic device of particle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103362522B (en) | 2016-05-11 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C53 | Correction of patent of invention or patent application | ||
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Address after: 200127 No. 1930 South Pudong Road, Shanghai, Pudong New Area Applicant after: Shanghai Urban Construction Materials Co., Ltd. Address before: 200063 Shanghai city Putuo District Caoyang Road No. 1040 in building 16 floor Applicant before: Shanghai Urban Construction Materials Co., Ltd. |
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