CN203603175U - Anti-corrosion structure of wind power generator foundation prestress component and wind power generator foundation - Google Patents
Anti-corrosion structure of wind power generator foundation prestress component and wind power generator foundation Download PDFInfo
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- CN203603175U CN203603175U CN201320835611.9U CN201320835611U CN203603175U CN 203603175 U CN203603175 U CN 203603175U CN 201320835611 U CN201320835611 U CN 201320835611U CN 203603175 U CN203603175 U CN 203603175U
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- 238000005260 corrosion Methods 0.000 title claims abstract description 42
- 238000000576 coating method Methods 0.000 claims description 22
- 239000011248 coating agent Substances 0.000 claims description 19
- 239000000565 sealant Substances 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 14
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- 239000011701 zinc Substances 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 abstract description 21
- 238000000034 method Methods 0.000 description 13
- 230000002421 anti-septic effect Effects 0.000 description 10
- 239000004800 polyvinyl chloride Substances 0.000 description 7
- 229920000915 polyvinyl chloride Polymers 0.000 description 6
- 238000005246 galvanizing Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000001680 brushing effect Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 239000003755 preservative agent Substances 0.000 description 3
- 230000002335 preservative effect Effects 0.000 description 3
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The utility model discloses an anti-corrosion structure of a wind power generator foundation prestress component and a wind power generator foundation, and relates to the technical field of the wind power generator foundation. The anti-corrosion structure of the wind power generator foundation prestress component and the wind power generator foundation are designed to solve the corrosion problem of the prestress component of the wind power generator foundation. The anti-corrosion structure of the wind power generator foundation prestress component comprises the prestress component which comprises a polish rod portion and threaded ends arranged at the two ends of the polish rod portion, a heat shrink tubing wraps the outer surface of the polish rod portion tightly, the outer surface of the heat shrink tubing is sleeved with a sleeve, and the sleeve and the heat shrink tubing are in clearance fit. The anti-corrosion structure of the wind power generator foundation prestress component is used for the wind power generator foundation.
Description
Technical field
The utility model relates to wind driven generator base technical field, relates in particular to a kind of anticorrosion structure and blower foundation of blower foundation prestressed member.
Background technology
The prestressed member that blower foundation (being wind driven generator base) adopts is generally crab-bolt or high-strength bolt, in order to reach prestressing without bondn structure, need to be outside prestressed member sheathed PVC (polyvinyl chloride) sleeve pipe, due to gapped between PVC sleeve pipe and crab-bolt, therefore before the lifting of blower foundation construction tail tower during this period of time and in the life cycle of 20 years, necessarily have water or steam enters in PVC sleeve pipe.
Existing prestressed member aseptic technic adopts galvanizing or Dacroment aseptic technic, and the prestressed member antiseptic property that Dacroment method was processed is better, but coating is very crisp, occasionally collides with and will break ring, and stretch-draw also can crack, and cost is higher.Utility model people finds realizing in process of the present utility model research, and the prestressed member of galvanizing processing has the process of high tempering to prestressed member, if whole prestressed member is adopted, can affect its mechanical property.In addition, both corrosion-inhibiting coatings are all to a little less than the anticorrosion opposing of soaking.In addition, screw thread exposed parts only adopts grease or corrosion resistant coating brushing, end antiseptic power also a little less than.
Utility model content
The purpose of this utility model is to provide a kind of anticorrosion structure and blower foundation of blower foundation prestressed member, has prevented the corrosion of blower foundation prestressed member, has increased the application life of prestressed member, has guaranteed the safety of wind-powered electricity generation unit.
For achieving the above object, embodiment of the present utility model adopts following technical scheme:
A kind of anticorrosion structure of blower foundation prestressed member, comprise prestressed member, described prestressed member comprises polished rod portion and is arranged at the end of thread at polished rod portion two ends, described polished rod portion external surface is close to and is coated with heat-shrink tube, described heat-shrink tube external surface is arranged with sleeve pipe, between described sleeve pipe and described heat-shrink tube, is matched in clearance.
Further, described end of thread external surface is provided with anti-corrosive metal coating.
Further, described anti-corrosive metal coating is zinc anticorrosive coat.
Further, described sleeve pipe is pvc pipe.
Further, also comprise concrete foundation, the upper surface of described concrete foundation is provided with anchor slab, the soffit of described concrete foundation is provided with lower anchor slab, on described upper anchor slab and lower anchor slab, all offer flange hole, the upper surface of described concrete foundation is provided with blower fan pylon, the lower end of described blower fan pylon is provided with tower flanges, in described tower flanges, the flange hole of corresponding described upper anchor slab offers tower flanges hole, the end of thread of described prestressed member lower end is connected with described lower anchor slab by nut through after the flange hole of described lower anchor slab, the end of thread of described prestressed member upper end is successively through being fastenedly connected by nut and described tower flanges behind the flange hole of described upper anchor slab and described tower flanges hole.
Further, be positioned at the prestressed member in described blower fan pylon outside, the part that the end of thread in the top exceeds described tower flanges upper surface is arranged with waterproof block, and the opening part of described waterproof block is tightly connected by the upper surface of fluid sealant and described tower flanges.
Further, the upper end of described heat-shrink tube is stretched into the upper surface that arranges and do not exceed described tower flanges in the flange hole of described upper anchor slab and described tower flanges hole successively.
Further, the gap between the upper end of described heat-shrink tube and described tower flanges hole is by elastic sealant shutoff.
Alternatively, the upper end of described sleeve pipe is stretched into the upper surface that arranges and do not exceed described tower flanges in the flange hole of described upper anchor slab and described tower flanges hole successively.
Further, the gap between the upper end of described sleeve pipe and described tower flanges hole is by elastic sealant shutoff.
Embodiment of the present utility model also provides a kind of blower foundation, comprises the anticorrosion structure of the blower foundation prestressed member described in above-mentioned arbitrary technical scheme.
Anticorrosion structure and the blower foundation of the blower foundation prestressed member that embodiment of the present utility model provides, be close to and be coated with heat-shrink tube at the external surface of the polished rod portion of prestressed member, because heat-shrink tube has certain toughness, therefore in the time that prestressed member is subject to post-tension of pre-stress distortion, heat-shrink tube can be out of shape with prestressed member, not easy to crack, and heat-shrink tube antiseptic effect under immersion condition is better, thus, prevent the corrosion of prestressed member, increase the application life of prestressed member, guaranteed the safety of wind-powered electricity generation unit.Meanwhile, be arranged with sleeve pipe at heat-shrink tube external surface, and be matched in clearance between sleeve pipe and heat-shrink tube, thus, can make between prestressed member and concrete foundation in without bond state, while having guaranteed prestressed stretch-draw, heat-shrink tube is not scratched by concrete, has improved the application life of heat-shrink tube.
Accompanying drawing explanation
Fig. 1 is the structural representation of the anticorrosion structure of the utility model embodiment blower foundation prestressed member;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the structural representation of the anticorrosion structure practical application of the utility model embodiment blower foundation prestressed member;
Fig. 4 is the C portion enlarged drawing of Fig. 3;
Fig. 5 is the B portion enlarged drawing of Fig. 3;
Wherein: anchor slab, 6-blower fan pylon, 7-waterproof block, 11-polished rod portion, the 12-end of thread, 61-tower flanges under 1-prestressed member, 2-heat-shrink tube, 3-sleeve pipe, the upper anchor slab of 4-, 5-.
The specific embodiment
Below in conjunction with accompanying drawing, anticorrosion structure and the blower foundation of a kind of blower foundation prestressed member of the utility model embodiment are described in detail.
In description of the present utility model, it will be appreciated that, term " " center ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of indications such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.
Fig. 1 is a specific embodiment of the anticorrosion structure of the utility model embodiment blower foundation prestressed member, the A-A sectional view that Fig. 2 is Fig. 1.With reference to Fig. 1, Fig. 2, the anticorrosion structure of blower foundation prestressed member in the present embodiment, comprise prestressed member 1, prestressed member 1 comprises polished rod portion 11 and is arranged at the end of thread 12 at polished rod portion 11 two ends, polished rod portion 11 external surfaces are close to and are coated with heat-shrink tube 2, heat-shrink tube 2 external surfaces are arranged with sleeve pipe 3, between sleeve pipe 3 and heat-shrink tube 2, are matched in clearance.
The anticorrosion structure of the blower foundation prestressed member that embodiment of the present utility model provides, be close to and be coated with heat-shrink tube 2 at polished rod portion 11 external surfaces of prestressed member 1, because heat-shrink tube 2 has certain toughness, therefore in the time that prestressed member 1 is subject to post-tension of pre-stress distortion, heat-shrink tube 2 can be with prestressed member 1 distortion, not easy to crack, and heat-shrink tube 2 antiseptic effect under immersion condition is better, thus, prevent the corrosion of prestressed member 1, increase the application life of prestressed member 1, guaranteed the safety of wind-powered electricity generation unit.Meanwhile, be arranged with sleeve pipe 3 at heat-shrink tube 2 external surfaces, and be matched in clearance between sleeve pipe 3 and heat-shrink tube 2, can make between prestressed member 1 and concrete foundation in without bond state, while having guaranteed prestressed stretch-draw, heat-shrink tube 2 is not scratched by concrete, has improved the application life of heat-shrink tube 2.
Because the end of thread 12 of prestressed member 1 cannot be coated heat-shrink tube 2, therefore can do separately preservative treatment to the end of thread of prestressed member 1 12, such as can, at the end of thread 12 external surface brushing grease or corrosion resistant coatings, also can anti-corrosive metal coating being set at the end of thread 12 external surfaces.Because anti-corrosive metal coating is more durable, difficult drop-off, and antiseptic effect is better, therefore preferably double thread end 12 to use anti-corrosive metal coating to carry out anticorrosion.
Anti-corrosive metal coating can comprise multiple, and as Dacromet/steel, zinc anticorrosive coat etc., because complex process and the cost of coating Dacromet/steel are higher, therefore preferably double thread end 12 uses galvanizing processing, thereby can be cost-saving under the prerequisite that guarantees antiseptic effect.
Further, the anticorrosion structure of described blower foundation prestressed member is applicable to various prestressed members, and its planform to prestressed member 1 does not have specific (special) requirements, for example, applicable to crab-bolt or high-strength bolt.
Wherein, sleeve pipe 3 can select multiple material to make, for example, can select polyvinyl chloride (PVC) material or metal material to make.In order to save cost of manufacture, preferably use PVC to make.PVC material price is cheap and have certain intensity, be arranged between heat-shrink tube 2 and concrete foundation, can make between heat-shrink tube 2 and concrete foundation in without bond state, while having guaranteed prestressed stretch-draw, heat-shrink tube 2 is not scratched by concrete, has improved the application life of heat-shrink tube 2.
With reference to Fig. 3, Fig. 3 is the structural representation of the anticorrosion structure practical application of the utility model embodiment blower foundation prestressed member, blower foundation generally comprises concrete foundation (not shown), upper anchor slab 4, lower anchor slab 5, prestressed member 1 and blower fan pylon 6, upper anchor slab 4 is arranged at the upper surface of concrete foundation, lower anchor slab 5 is arranged at the soffit of described concrete foundation, on upper anchor slab 4 and lower anchor slab 5, all offer flange hole, the upper surface of described concrete foundation is provided with blower fan pylon 6, the lower end of described blower fan pylon 6 is provided with tower flanges 61, in described tower flanges 61, the flange hole of corresponding described upper anchor slab 4 offers tower flanges hole.With reference to Fig. 4, the C portion enlarged drawing that Fig. 4 is Fig. 3, the end of thread 12 of prestressed member 1 lower end is connected with described lower anchor slab 5 by nut through after the flange hole of described lower anchor slab 5; With reference to Fig. 5, the B portion enlarged drawing that Fig. 5 is Fig. 3, the end of thread 12 of prestressed member 1 upper end is successively through being fastenedly connected by nut and described tower flanges 61 behind the flange hole of described upper anchor slab 4 and described tower flanges hole.
With reference to Fig. 5, in order to prevent that the ponding in flange hole from causing corrosion to prestressed member, the upper end of heat-shrink tube 2 can be stretched into successively to the upper surface that arranges and do not exceed tower flanges 61 in the flange hole of upper anchor slab 4 and tower flanges hole.Thus, by heat-shrink tube 2, prestressed member 1 and flange hole inwall are separated, prestressed member 1 is not directly contacted with flange hole inwall, effectively prevented that the ponding in flange hole from causing corrosion to prestressed member.Simultaneously, arrange owing to the upper end of heat-shrink tube 2 being stretched into successively in the flange hole of upper anchor slab 4 and tower flanges hole, make the upper end of heat-shrink tube 2 exceed the bonding surface of upper anchor slab 4 and tower flanges 61, thus, can effectively prevent aqueous vapor from bonding surface enters at position, heat-shrink tube termination ponding, thereby prestressed member is caused to corrosion.
Further, can be by the gap between the upper end of described heat-shrink tube 2 and described tower flanges hole by elastic sealant shutoff.Thus, can effectively the prestressed member 1 of extraneous aqueous vapor and concrete foundation inside be isolated, prevent from, the gap of outside aqueous vapor between heat-shrink tube 2 and flange hole from entering concrete foundation inside, prestressed member 1 is caused to corrosion.
More preferably, the upper end of sleeve pipe 3 can be stretched into successively to the upper surface that arranges and do not exceed tower flanges 61 in the flange hole of described upper anchor slab 4 and tower flanges hole.And elastic sealant shutoff is passed through in the gap between the upper end of sleeve pipe 3 and described tower flanges hole.Thus, in effectively having prevented that the ponding in flange hole from causing corrosion to prestressed member 1, also prevented that flange hole inwall from causing wearing and tearing to heat-shrink tube 2.
Embodiment of the present utility model also provides a kind of anti-corrosion method of blower foundation prestressed member, comprises the following steps:
Heat-shrink tube 2 cover is set to the polished rod portion 11 of prestressed member 1, and heating makes to produce negative-pressure vacuum between heat-shrink tube 2 and polished rod portion 11 external surfaces, thereby make heat-shrink tube 2 be close to the external surface that is coated on polished rod portion 11;
At the sheathed sleeve pipe 3 of heat-shrink tube 2 external surface, between sleeve pipe 3 and described heat-shrink tube 2, be matched in clearance.
The anti-corrosion method of the blower foundation prestressed member that embodiment of the present utility model provides, be close to and be coated with heat-shrink tube 2 at the external surface of the polished rod portion 11 of prestressed member 1, because heat-shrink tube 2 has certain toughness, therefore in the time that prestressed member 1 is subject to post-tension of pre-stress distortion, heat-shrink tube 2 can be out of shape with prestressed member, not easy to crack, and heat-shrink tube 2 antiseptic effect under immersion condition is better, thus, prevent the corrosion of prestressed member 1, increase the application life of prestressed member 1, guaranteed the safety of wind-powered electricity generation unit.Meanwhile, be arranged with sleeve pipe 3 at heat-shrink tube 2 external surfaces, and be matched in clearance between sleeve pipe 3 and heat-shrink tube 2, can make between prestressed member 1 and concrete foundation in without bond state, while having guaranteed prestressed stretch-draw, heat-shrink tube 2 is not scratched by concrete, has improved the application life of heat-shrink tube 2.
Further, said method is further comprising the steps of: the end of thread 12 to prestressed member 1 two ends carries out anti-corrosive metal coating processing.Because the end of thread 12 of prestressed member 1 cannot be coated heat-shrink tube 2, therefore can do separately preservative treatment to the end of thread of prestressed member 1 12, such as can, at the end of thread 12 external surface brushing grease or corrosion resistant coatings, also can anti-corrosive metal coating being set at the end of thread 12 external surfaces.Because anti-corrosive metal coating is more durable, difficult drop-off, and antiseptic effect is better, therefore preferably double thread end 12 to use anti-corrosive metal coating to carry out anticorrosion.
Preferably, described anti-corrosive metal coating is treated to galvanizing processing.Anti-corrosive metal coating can comprise multiple, and as Dacromet/steel, zinc anticorrosive coat etc., because complex process and the cost of coating Dacromet/steel are higher, therefore preferably double thread end 12 uses galvanizing processing, thereby can be cost-saving under the prerequisite that guarantees antiseptic effect.
In order to prevent that the ponding in flange hole from causing corrosion to prestressed member 1, described method is further comprising the steps of: the upper end of heat-shrink tube 2 is stretched into successively to the upper surface that arranges and do not exceed tower flanges 61 in the flange hole of upper anchor slab 4 and tower flanges hole; Then use the gap between elastic sealant shutoff flange hole and heat-shrink tube 2.Thus, by heat-shrink tube 2, prestressed member 1 and flange hole inwall are separated, prestressed member 1 is not directly contacted with flange hole inwall, effectively prevented that the ponding in flange hole from causing corrosion to prestressed member 1.Simultaneously, arrange owing to the upper end of heat-shrink tube 2 being stretched into successively in the flange hole of upper anchor slab 4 and tower flanges hole, make the upper end of heat-shrink tube 2 exceed the bonding surface of upper anchor slab 4 and tower flanges 61, thus, can effectively prevent aqueous vapor from bonding surface enters at position, heat-shrink tube termination ponding, thereby prestressed member is caused to corrosion.In addition, with the gap between elastic sealant shutoff flange hole and heat-shrink tube 2, can effectively the prestressed member 1 of extraneous aqueous vapor and concrete foundation inside be isolated, prevent from, the gap of outside aqueous vapor between heat-shrink tube 2 and flange hole from entering concrete foundation inside, prestressed member 1 is caused to corrosion.
In order to prevent that flange hole inwall from causing wearing and tearing to heat-shrink tube 2, described method is further comprising the steps of: the upper end of sleeve pipe 3 is stretched into successively to the upper surface that arranges and do not exceed tower flanges 61 in the flange hole of upper anchor slab 4 of blower foundation and tower flanges hole.Then use the gap between elastic sealant shutoff flange hole and sleeve pipe 3.Thus, in effectively having prevented that the ponding in flange hole from causing corrosion to prestressed member 1, also prevented that flange hole inwall from causing wearing and tearing to heat-shrink tube 2.
Be positioned at the prestressed member 1 in blower fan pylon 6 outsides, the part that exceeds described tower flanges 61 upper surfaces due to the end of thread 12 of its upper end directly contacts with outside air, is more prone to be corroded.Therefore preferably use following methods to carry out preservative treatment: to being positioned at the prestressed member 1 in blower fan pylon outside of blower foundation, the sheathed waterproof block 7 of part that exceeds tower flanges 61 upper surfaces at the end of thread 12 of these prestressed member 1 upper ends, the opening part of described waterproof block 7 is tightly connected by fluid sealant and tower flanges 61 upper surfaces.Thus, waterproof block 7 can effectively prevent the corrosion of aqueous vapor double thread end 12 exposed parts, and junction is connected and can further be prevented aqueous vapor infiltration by sealant sealing.
Embodiment of the present utility model also provides a kind of blower foundation, comprises the anticorrosion structure of the blower foundation prestressed member described in above-mentioned arbitrary technical scheme.
The anticorrosion structure of the blower foundation prestressed member providing in the each embodiment due to the anticorrosion structure of the blower foundation prestressed member using in the blower foundation of the present embodiment and the anticorrosion structure of above-mentioned blower foundation prestressed member is identical, therefore the two can solve identical technical problem, and reaches identical Expected Results.
To sum up, the useful technique effect that the utility model produces may be summarized as follows:
(1) practicality simple to operate, and do not affect crab-bolt prestressed stretch-draw and the lifting of tower cylinder;
(2) reduce the scope of surface anticorrosion processing, reduced the cost of crab-bolt;
(3) antiseptic effect is obviously better than existing method;
(4) go deep into crab-bolt with the crab-bolt sectional dimension of heat-shrink tube compared with I and be connected gap with flange, guarantee that flange hole internal water accumulation can not impact crab-bolt bulk material;
(5) considered the anticorrosion of crab-bolt exposed parts and crab-bolt body.
In the description of this manual, specific features, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
The above; it is only the specific embodiment of the present utility model; but protection domain of the present utility model is not limited to this; any be familiar with those skilled in the art the utility model disclose technical scope in; can expect easily changing or replacing, within all should being encompassed in protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of described claim.
Claims (11)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320835611.9U CN203603175U (en) | 2013-12-17 | 2013-12-17 | Anti-corrosion structure of wind power generator foundation prestress component and wind power generator foundation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320835611.9U CN203603175U (en) | 2013-12-17 | 2013-12-17 | Anti-corrosion structure of wind power generator foundation prestress component and wind power generator foundation |
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| Publication Number | Publication Date |
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| CN203603175U true CN203603175U (en) | 2014-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320835611.9U Expired - Lifetime CN203603175U (en) | 2013-12-17 | 2013-12-17 | Anti-corrosion structure of wind power generator foundation prestress component and wind power generator foundation |
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| CN (1) | CN203603175U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696448A (en) * | 2013-12-17 | 2014-04-02 | 北京金风科创风电设备有限公司 | Anti-corrosion structure and anti-corrosion method of fan foundation prestressed component and fan foundation |
| CN105002934A (en) * | 2015-07-08 | 2015-10-28 | 周剑辉 | Anti-corrosion protection system with function of initiative permeation for reinforced concrete base |
-
2013
- 2013-12-17 CN CN201320835611.9U patent/CN203603175U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696448A (en) * | 2013-12-17 | 2014-04-02 | 北京金风科创风电设备有限公司 | Anti-corrosion structure and anti-corrosion method of fan foundation prestressed component and fan foundation |
| CN103696448B (en) * | 2013-12-17 | 2016-05-18 | 北京金风科创风电设备有限公司 | Anti-corrosion structure and anti-corrosion method of fan foundation prestressed components, fan foundation |
| CN105002934A (en) * | 2015-07-08 | 2015-10-28 | 周剑辉 | Anti-corrosion protection system with function of initiative permeation for reinforced concrete base |
| CN105002934B (en) * | 2015-07-08 | 2018-01-09 | 周剑辉 | A kind of reinforced concrete foundation anti-corrosion protection system of active infiltration |
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Granted publication date: 20140521 |