CN115262658A - Device for preventing concrete structure from being corroded - Google Patents
Device for preventing concrete structure from being corroded Download PDFInfo
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- CN115262658A CN115262658A CN202211009643.3A CN202211009643A CN115262658A CN 115262658 A CN115262658 A CN 115262658A CN 202211009643 A CN202211009643 A CN 202211009643A CN 115262658 A CN115262658 A CN 115262658A
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- concrete structure
- foundation
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- pile
- sand layer
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- 239000004576 sand Substances 0.000 claims abstract description 45
- 239000010802 sludge Substances 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 230000007797 corrosion Effects 0.000 claims abstract description 19
- 238000005260 corrosion Methods 0.000 claims abstract description 19
- 239000004568 cement Substances 0.000 claims description 26
- 239000002689 soil Substances 0.000 claims description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 238000010276 construction Methods 0.000 abstract description 20
- 230000035699 permeability Effects 0.000 abstract description 4
- 230000006378 damage Effects 0.000 abstract 1
- 239000003673 groundwater Substances 0.000 abstract 1
- 239000002002 slurry Substances 0.000 description 9
- 238000003756 stirring Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 238000005536 corrosion prevention Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/06—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against corrosion by soil or water
Abstract
The application discloses a device for preventing concrete structure is corroded to solve the sand-filled layer department ground water level fluctuation area that prior art exists, strong to concrete structure's degree of corrosion, and cause destruction, the problem of anticorrosive expense increase. The application includes: the building comprises a building and a concrete structure foundation, wherein the concrete structure foundation is arranged in a stratum; the stratum comprises a sand layer and a sludge layer, the sand layer is provided with a water level variable zone along the height direction, and the height of the water level variable zone is smaller than that of the sand layer; the concrete structure foundation comprises a pile foundation bearing platform, wherein a plurality of pile bodies are arranged at the bottom of the pile foundation bearing platform; a waterproof curtain is arranged on the periphery of the concrete structure foundation, the upper end of the waterproof curtain and the upper end surface of the sand layer are positioned on the same level, and the lower end of the waterproof curtain is arranged in the sludge layer; this application simple structure, construction convenience, greatly reduced the permeability of sand bed, and then reduced the degree of corrosion to concrete structure basis for anticorrosive expense reduces.
Description
Technical Field
The application relates to the technical field of building construction, in particular to a device for preventing a concrete structure from being corroded.
Background
The sea reclamation land is basically formed by filling sand on a beach in coastal areas, and finally forms a special geological structure with a sand layer at the upper part and a sludge layer at the lower part, and the land formed by the sea reclamation land is filled with the sand. In the land area, due to the fluctuation of seawater, the backfilled sand layer is in an upper and lower fluctuation belt of the underground water level, and sulfate in water and soil has strong corrosion degree on the concrete structure foundation of the building, so that the corrosion prevention cost is increased, and the concrete structure is damaged to a certain extent, thereby affecting the safety of the building.
Disclosure of Invention
Therefore, the device for preventing the concrete structure from being corroded is provided, and the problems that the concrete structure is strongly corroded, damaged and corrosion prevention cost is increased due to the fact that the underground water level fluctuation belt at the backfilling sand layer in the prior art are solved.
In order to achieve the above purpose, the present application provides the following technical solutions:
an apparatus for preventing corrosion of a concrete structure, characterized by comprising: the concrete structure foundation is arranged in the ground layer; the stratum comprises a sand layer positioned on an upper layer of the sea filling and reclamation land and a sludge layer positioned on a lower layer, a water level variable zone is arranged on the sand layer along the height direction, and the height of the water level variable zone is smaller than that of the sand layer; the concrete structure foundation comprises a pile foundation bearing platform, and a plurality of pile bodies are arranged at the bottom of the pile foundation bearing platform; the periphery of the concrete structure foundation is provided with a waterproof curtain, the upper end of the waterproof curtain and the upper end face of the sand layer are positioned on the same level, and the lower end of the waterproof curtain is arranged inside the sludge layer.
Optionally, a basement is arranged at the bottom end of the building, and the pile foundation cap is located at the bottom end of the basement; the waterproof curtain is arranged on the outer edge of the basement foundation pit.
Optionally, the waterproof curtain is a cement soil curtain formed by mixing cement and foundation soil.
Optionally, the pile foundation bearing platform is arranged in the sand layer, and the lower end of the pile foundation bearing platform is higher than the surface of the sludge layer; the pile body penetrates through the sludge layer and enters the bearing layer at the lower part of the sludge layer, and the upper part of the pile body is positioned in the sand layer.
Optionally, the height of the sand layer is 2-10m; the height of the water level fluctuation belt is 4-7m; the height of the waterproof curtain is 3-11m.
Optionally, the lower end of the water-proof curtain extends into the sludge layer by a depth of 1-2m.
Optionally, a plurality of pile bodies are uniformly arranged at the bottom of the pile foundation cap; pile foundation cushion cap inside is provided with first reinforcing bar, and every pile body is inside to be provided with the second reinforcing bar, the second reinforcing bar stretch into pile foundation cushion cap inside and with first reinforcing bar is tied up together.
Compared with the prior art, the method has the following beneficial effects that:
the bottom of a building is provided with a concrete structure foundation, the concrete structure foundation is arranged in a stratum, the stratum comprises a sand layer and a sludge layer, a water-proof curtain is arranged on the periphery of the concrete structure foundation at the bottom of the building, the upper end of the water-proof curtain and the upper end surface of the sand layer are positioned on the same level, and the lower end of the water-proof curtain is arranged in the sludge layer; the arrangement of the waterproof curtain greatly reduces the permeability of a sand layer, and the concrete structure foundation at the bottom of the building is isolated from the surrounding water environment of the building, so that the concrete structure foundation is in a relatively independent water environment consisting of the waterproof curtain and the waterproof stratum, and the isolated concrete structure foundation is not influenced by the fluctuation of underground water of a water level fluctuation zone, thereby reducing the corrosion degree of the concrete structure foundation and protecting the concrete structure; the application has the advantages that the structure is simple, the construction is convenient, the permeability of a sand layer is greatly reduced, the corrosion degree of a concrete structure foundation is further reduced, and the corrosion prevention cost is reduced; when the waterproof curtain is constructed, the cement slurry is stirred according to the requirement before the machine is started, the cement mixing amount is not less than 23%, through practice tests, the cement mixing amount enables the using effect of the waterproof curtain to be good, and the water stopping effect of a sand layer is guaranteed.
Drawings
To more intuitively illustrate the prior art and the present application, several exemplary drawings are given below. It should be understood that the specific shapes, configurations and illustrations in the drawings are not to be construed as limiting, in general, the practice of the present application; for example, it is within the ability of those skilled in the art to make routine adjustments or further optimizations based on the technical concepts disclosed in the present application and the exemplary drawings, for the increase/decrease/attribution of certain units (components), specific shapes, positional relationships, connection manners, dimensional ratios, and the like.
FIG. 1 is a schematic structural view (without basement) provided by an embodiment of the present application;
FIG. 2 is a schematic structural view (with a basement) provided in an embodiment of the present application;
fig. 3 is a schematic top view of fig. 1.
Description of the reference numerals:
1. a building; 2. a concrete structure foundation; 201. a pile foundation bearing platform; 202. a pile body; 3. a sand layer; 4. a sludge layer; 5. a water level fluctuation belt; 6. a waterproof curtain; 7. a basement.
Detailed Description
The present application will be described in further detail below with reference to specific embodiments thereof, with reference to the accompanying drawings.
In the description of the present application: "plurality" means two or more unless otherwise specified. The terms "first", "second", "third", and the like in this application are intended to distinguish one referenced item from another without having a special meaning in technical connotation (e.g., should not be construed as emphasizing a degree or order of importance, etc.). The terms "comprising," "including," "having," and the like, are intended to be inclusive and mean "not limited to" (some elements, components, materials, steps, etc.).
In the present application, terms such as "upper", "lower", "left", "right", "middle", and the like are generally used for easy visual understanding with reference to the drawings, and are not intended to absolutely limit the positional relationship in an actual product. Changes in these relative positional relationships are also considered to be within the scope of the present disclosure without departing from the technical concepts disclosed in the present disclosure.
In one embodiment of the present application, a device for preventing a concrete structure from being corroded is applied to a coastal area, sand is filled on a beach to form a special stratum, the upper part of the special stratum is a sand layer, and the lower part of the special stratum is a sludge layer; due to the fluctuation of seawater, the backfill sand layer is positioned in an upper and lower fluctuation zone of the underground water level, and the corrosion degree of sulfate in water and soil to a concrete structure is stronger under a dry-wet alternative environment with the fluctuation of the underground water level.
Referring to fig. 1-3, the present application includes: the building comprises a building 1, wherein the building 1 is positioned on the ground, a concrete structure foundation 2 is arranged at the bottom of the building 1, the concrete structure foundation 2 is arranged in the ground, and the concrete structure foundation 2 supports the building 1; the stratum comprises a sand layer 3 positioned on an upper layer of the sea filling and reclamation land and a sludge layer 4 positioned on a lower layer, the sand layer 3 is broken stone and is laid at the upper end of the sludge layer 4, a water level variable belt 5 is arranged on the sand layer 3 along the height direction, and the height of the water level variable belt 5 is smaller than that of the sand layer 3; the concrete structure foundation 2 comprises a pile foundation bearing platform 201, wherein a plurality of pile bodies 202 are arranged at the bottom of the pile foundation bearing platform 201; a waterproof curtain 6 is arranged on the periphery of the concrete structure foundation 2, the upper end of the waterproof curtain 6 and the upper end surface of the sand layer 3 are positioned at the same level, and the lower end of the waterproof curtain is arranged in the sludge layer 4; the sludge layer 4 is a water-resisting stratum.
Preferably, the basement 7 is arranged at the bottom end of the building 1, and the pile foundation cap 201 is positioned at the bottom end of the basement 7; the waterproof curtain 6 is arranged at the outer edge of the basement foundation pit and is firstly used as the waterproof curtain 6 for foundation pit construction, and then is used as the waterproof curtain 6 for the foundation of the building 1 after the foundation pit construction is finished.
Further preferably, the waterproof curtain 6 is a cement soil curtain formed by stirring cement and foundation soil, wherein cement slurry is stirred according to the requirement before starting up, the cement doping amount is not less than 23%, and the waterproof curtain 6 has a good use effect under the cement doping amount proportion through practice tests, and the water stopping effect of the sand layer 3 is ensured; the construction can be carried out by adopting a three-shaft mixing pile machine or a TRD (blast furnace direct grouting) construction machine, and the continuous construction is carried out along the outer edge of the concrete structure foundation 2 or the basement foundation pit to form a closed loop.
Still further preferably, the water-proof curtain 6 has a square cross section.
Preferably, the pile foundation cap 201 is arranged in the sand layer 3, and the lower end of the pile foundation cap 201 is higher than the surface of the sludge layer 4; the pile body 202 passes through the sludge layer 4 and enters a bearing stratum at the lower part of the sludge layer 4, and the upper part of the pile body 202 is positioned in the sand layer 3.
Preferably, the height of the sand layer 3 is 2-10m; the height of the water level variable belt 5 is 4-7m; the height of the waterproof curtain 6 is 3-11m.
Further preferably, the depth that the lower end of the waterproof curtain 6 extends into the sludge layer 4 is 1-2m, which is convenient for the construction of the pile foundation cap 201; the depth of the water-barrier curtain 6 may exceed that of the water-barrier formation.
Preferably, a plurality of pile bodies 202 are uniformly arranged at the bottom of the pile foundation cap 201; the pile foundation pile cap 201 is internally provided with first steel bars, each pile body 202 is internally provided with second steel bars, and the second steel bars extend into the pile foundation pile cap 201 and are bound with the first steel bars.
In the construction of the embodiment, the construction of the foundation pile is firstly carried out; constructing a waterproof curtain 6 by using a triaxial mixing pile machine or a TRD machine; finally, constructing the concrete structure foundation 2; the method comprises the following specific steps:
1) Measuring and paying off: according to the coordinate reference point, the general plane layout drawing and the containment engineering construction drawing; discharging a pile position control line according to a drawing, and setting a temporary control pile;
2) Digging a groove: digging a groove by using a digging machine according to the enclosing side line of the foundation pit, removing underground obstacles, and timely treating the soil body of the dug groove to ensure normal construction of triaxial deep stirring;
3) The pile driver is in place: a technician uniformly commands the pile driver to be in place, lays a steel plate under the pile driver, moves nearby conditions, finds that an obstacle is in time to be removed, and checks and corrects the positioning condition in time after the movement is finished; the pile driver is stable and straight, and is observed by a theodolite or a plumb bob to ensure the verticality of the drilling machine; the pile position positioning deviation of the triaxial cement mixing pile is not less than 1cm; after pile forming, the deviation of the center of the pile cannot exceed 50mm, and the verticality deviation of the pile body cannot exceed 0.2%;
4) Preparing cement slurry and injecting the slurry: a. building a slurry mixing construction platform on a construction site, building a cement silo near the platform, and mixing cement slurry according to the requirement before starting up, wherein the cement mixing amount is not less than 23%; feeding the prepared cement slurry into a grouting barrel for later use; b. after the cement paste is prepared, the stagnation time is not more than 2h, and the construction interval of the adjacent overlapped stirring piles is not more than 24h;
5) Drilling and stirring: the three-shaft stirring pile adopts a construction process of 'two-spraying two-stirring', and adopts a jumping construction mode; cement slurry is injected into the triaxial cement mixing pile in the sinking and lifting processes, the sinking speed and the mixing and lifting speed are controlled within 0.6m/min, and the uniform sinking and uniform lifting are kept; and (5) repeatedly stirring and grouting the pile bottom part, staying for about 1min, and making an original record.
According to the evaluation standard of geotechnical engineering investigation Specification GB50021-2001 (2009 edition), if the corrosion environments I and II do not have alternate action of dry and wet, the evaluation limit of the corrosivity of the sulfate on the concrete structure is improved by 30%, the corrosion grade is reduced, and the corrosion prevention cost is reduced.
The application has the advantages that the structure is simple, the construction is convenient, the permeability of a sand layer is greatly reduced, the corrosion degree to a concrete structure foundation is further reduced, the concrete structure is protected, and the corrosion prevention cost is reduced; the original corrosion grade is strong, medium and weak corrosion, and can be reduced to medium, weak and micro corrosion.
In addition, the waterproof curtain adopts a cement soil curtain formed by stirring cement and foundation soil, and a triaxial mixing pile machine is adopted, so that the construction speed is high, the construction efficiency is high, the operation is simple, and the cost is low; when the waterproof curtain is constructed, the cement slurry is stirred according to the requirement before starting, the cement mixing amount is not less than 23%, through practice inspection, the cement mixing amount enables the using effect of the waterproof curtain to be good, and the water stopping effect of a sand layer is guaranteed.
All the technical features of the above embodiments can be arbitrarily combined (as long as there is no contradiction between the combinations of the technical features), and for brevity of description, all the possible combinations of the technical features in the above embodiments are not described; these examples, which are not explicitly described, should be considered to be within the scope of the present description.
The present application has been described in considerable detail with reference to certain embodiments and examples thereof. It should be understood that several general adaptations or further innovations of these specific embodiments can also be made based on the technical idea of the present application; however, such conventional modifications and further innovations may also fall within the scope of the claims of the present application as long as they do not depart from the technical idea of the present application.
Claims (7)
1. An apparatus for preventing corrosion of a concrete structure, comprising: the system comprises a building and a concrete structure foundation arranged at the bottom of the building, wherein the concrete structure foundation is arranged in a stratum; the stratum comprises a sand layer positioned on an upper layer of the sea filling and reclamation land and a sludge layer positioned on a lower layer, a water level variable zone is arranged on the sand layer along the height direction, and the height of the water level variable zone is smaller than that of the sand layer; the concrete structure foundation comprises a pile foundation bearing platform, and a plurality of pile bodies are arranged at the bottom of the pile foundation bearing platform; the periphery of the concrete structure foundation is provided with a waterproof curtain, the upper end of the waterproof curtain and the upper end face of the sand layer are positioned on the same level, and the lower end of the waterproof curtain is arranged inside the sludge layer.
2. The apparatus for preventing corrosion of a concrete structure according to claim 1, wherein a basement is provided at a bottom end of the building, and the pile foundation cap is located at a bottom end of the basement; the waterproof curtain is arranged on the outer edge of the basement foundation pit.
3. The apparatus for preventing a concrete structure from being corroded according to claim 2, wherein the waterproof curtain is a soil cement curtain formed by mixing cement and foundation soil.
4. The apparatus for preventing corrosion of a concrete structure according to claim 1, wherein the pile foundation cap is provided in the sand layer with a lower end thereof higher than a surface of the sludge layer; the pile body penetrates through the sludge layer and enters the bearing layer at the lower part of the sludge layer, and the upper part of the pile body is positioned in the sand layer.
5. The apparatus for preventing corrosion of a concrete structure according to claim 1, wherein the height of said sand layer is 2-10m; the height of the water level fluctuation belt is 4-7m; the height of the waterproof curtain is 3-11m.
6. The apparatus for preventing corrosion of a concrete structure according to claim 5, wherein the lower end of the water-proof curtain is extended into the sludge layer by a depth of 1-2m.
7. The apparatus for preventing corrosion of a concrete structure according to claim 1, wherein a plurality of said pile bodies are uniformly arranged at the bottom of said pile foundation cap; pile foundation cushion cap inside is provided with first reinforcing bar, and every pile body is inside to be provided with the second reinforcing bar, the second reinforcing bar stretch into pile foundation cushion cap inside and with first reinforcing bar is tied up together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211009643.3A CN115262658A (en) | 2022-08-22 | 2022-08-22 | Device for preventing concrete structure from being corroded |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211009643.3A CN115262658A (en) | 2022-08-22 | 2022-08-22 | Device for preventing concrete structure from being corroded |
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| Publication Number | Publication Date |
|---|---|
| CN115262658A true CN115262658A (en) | 2022-11-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211009643.3A Pending CN115262658A (en) | 2022-08-22 | 2022-08-22 | Device for preventing concrete structure from being corroded |
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| CN (1) | CN115262658A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615015A (en) * | 2013-10-26 | 2014-03-05 | 芜湖新兴铸管有限责任公司 | Building foundation reinforcing structure |
| CN203603160U (en) * | 2013-10-26 | 2014-05-21 | 芜湖新兴铸管有限责任公司 | Ground stabilization structure of building |
| CN104452829A (en) * | 2014-11-18 | 2015-03-25 | 中大建设有限公司 | Piled raft foundation anti-floating structure and construction method |
| CN106759379A (en) * | 2017-01-25 | 2017-05-31 | 北京市政建设集团有限责任公司 | A kind of construction method of the asymmetric water-stop curtain of foundation ditch |
| CN106894430A (en) * | 2017-01-25 | 2017-06-27 | 北京市政建设集团有限责任公司 | A kind of three axes agitating pile waterproof curtain construction method |
| CN112663694A (en) * | 2019-10-15 | 2021-04-16 | 北京恒祥宏业基础加固技术有限公司 | Construction method for lifting and rectifying building on silt geology |
-
2022
- 2022-08-22 CN CN202211009643.3A patent/CN115262658A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615015A (en) * | 2013-10-26 | 2014-03-05 | 芜湖新兴铸管有限责任公司 | Building foundation reinforcing structure |
| CN203603160U (en) * | 2013-10-26 | 2014-05-21 | 芜湖新兴铸管有限责任公司 | Ground stabilization structure of building |
| CN104452829A (en) * | 2014-11-18 | 2015-03-25 | 中大建设有限公司 | Piled raft foundation anti-floating structure and construction method |
| CN106759379A (en) * | 2017-01-25 | 2017-05-31 | 北京市政建设集团有限责任公司 | A kind of construction method of the asymmetric water-stop curtain of foundation ditch |
| CN106894430A (en) * | 2017-01-25 | 2017-06-27 | 北京市政建设集团有限责任公司 | A kind of three axes agitating pile waterproof curtain construction method |
| CN112663694A (en) * | 2019-10-15 | 2021-04-16 | 北京恒祥宏业基础加固技术有限公司 | Construction method for lifting and rectifying building on silt geology |
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Address after: No. 327 Jiahe Road, Siming District, Xiamen City, Fujian Province, 361000, 21D Applicant after: China Building Materials (Fujian) Survey and Design Co.,Ltd. Xiamen Branch Address before: 21D, No. 327, Jiahe Road, Siming District, Xiamen, Fujian, 361001 Applicant before: Building Materials Fuzhou Geological Engineering Survey Institute Co.,Ltd. Xiamen Branch |
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