CN203373739U - Prestress centrifugal corrosion resistant hollow square pile - Google Patents
Prestress centrifugal corrosion resistant hollow square pile Download PDFInfo
- Publication number
- CN203373739U CN203373739U CN201320308155.2U CN201320308155U CN203373739U CN 203373739 U CN203373739 U CN 203373739U CN 201320308155 U CN201320308155 U CN 201320308155U CN 203373739 U CN203373739 U CN 203373739U
- Authority
- CN
- China
- Prior art keywords
- pile
- hollow square
- end plate
- corrosion
- square pile
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The utility model discloses a prestress centrifugal corrosion resistant hollow square pile which comprises a pile body, a pile end or a pile point, an end connecting structure and a joint protecting structure. The pile point is located at the front end of the pile body. The pile point and the pile body are of an integrated structure. A steel bar is arranged at the front end of the pile point. The end connecting structure comprises an end board and a strip steel apron board. The end board is arranged at one end portion of the hollow square pile and connected with a main reinforcing rib of the pile body. A welding groove is formed in the side face of the end board. A reinforcing rib penetrating hole and a tension hole are formed in the end board. The reinforcing rib penetrating hole and the tension hole are symmetric about the center of the end board. The strip steel apron board is connected with the end board and arranged on the connecting portion of the end board and the pile body of the hollow square pile. The joint protecting structure comprises a corrosion resistant coating and/or a negative pole cushion board. The negative pole cushion board is embedded in one end portion of the hollow square pile. The joint portion of the pile body is coated with the corrosion resistant coating and the end board and the welding portion of the end board are coated with the corrosion resistant coating. According to the prestress centrifugal corrosion resistant hollow square pile, the durability and the corrosion resistant performance of a centrifugal steam curing precast pile and a pile foundation are improved so that the safety of building materials and a building foundation can be improved.
Description
Technical field
The utility model relates to building material field, specifically belongs to a kind of corrosion-resistant and prestressed centrifugally hollow square pile durability that relates to.
Background technology
China is vast in territory, marine environment is different and weather is various, damp and hot, carbonization and chlorine salt corrosion as the southeastern coastal areas, the freeze thawing of Northern Coastal Provinces, carbonization and chlorine salt corrosion, dry and cold, xeothermic, the villaumite of western Salt Lake Area and sulphate corrosion, these all make the mode of failure of precast concrete general, various and complicated.
In the Second Committee concrete durability international conference of holding in 1991, Metha points out " world today; the main cause that concrete component destroys is successively decreased and put in order by importance: the physics chemical action of corrosion of steel bar, freeze thawing circulation, erosion environment " in the report that is entitled as " concrete durability-50 year progress ", that is to say, corrosion is one of principal element affected concrete durability, and corrosion comprises acid, alkali, the concrete corrosion of salt pair usually.
With cast-in-situ concrete, compare, precast concrete is about research and the correlation technique exploitation wretched insufficiency of corrosion resistance, durability.2006, combined a research by Zhongshan Sanhe Building Materials Co., Ltd., Shenzhen Graduate School of Tsinghua University, material engineering research institute of Tongji University, this research thinks now widely used and mixes levigate sand, adopts the durability of prestress high intensity concrete stake of steam pressure explained hereafter lower, is not suitable for the pile foundation engineering that, chloride-penetration resistance freeze proof for having under the drying and watering cycle condition and sulphate corrosion etc. require.The eighties in 20th century, Mehta and Gerwick have investigated the beam body that San Francisco Bay San Mateo-Hayward bridge is corroded, and the single cement consumption of this beam body concrete is 370kg, and wherein a part of beam adopts stream curing, and a part of beam adopts natural curing.After the exposure of 17 years, adopt steam-cured beam corrosion to occur and had to be repaired, and the sign of any corrosion does not also appear in the beam of natural curing.The people's such as Detwiler result of study shows, the ability of the maintenance meeting reduction portland cement concrete chloride-penetration resistance under higher temperature, and the corrosion resistance problem more easily occurs than the member of natural curing in this explanation steamed concrete member.
The utility model content
Technical problem to be solved in the utility model is to provide the corrosion-resistant hollow square pile of a kind of prestressed centrifugally, solves durability and the corrosion resistance problem of centrifugal steam curing of concrete member.
For solving the problems of the technologies described above, the corrosion-resistant hollow square pile of the prestressed centrifugally that the utility model provides, comprise pile body, stake end, end connecting structure and joint protective structure,
Described end connecting structure comprises end plate and band steel skirtboard, described end plate is located at the end of hollow square pile and is connected with the main muscle of pile body, the side of described end plate has bevel for welding, end plate is provided with wears muscle hole and stretch-draw hole, describedly wear the muscle hole and the stretch-draw hole is centrosymmetric with the end plate center, described band steel skirtboard and end plate link together, and this is located at the pile body connecting portion of end plate and hollow square pile with the steel skirtboard;
Described joint protective structure comprises corrosion-inhibiting coating and/or negative electrode cushion block, and wherein the negative electrode cushion block is embedded in the end of hollow square pile in advance, and corrosion-inhibiting coating is coated on the joint of pile body and the weld of end plate and end plate is enclosed in to its inside.
Further, described square pile can also comprise pile top, this pile top be positioned at the concrete hollow square pile pile body front end and with pile body be overall structure, described pile top is terrace with edge shape, be provided with the pile top reinforcing bar in pile top, every group of pile top reinforcing bar comprises vertically section of a tilting section and, and the front end of pile top is provided with a rod iron, described rod iron is enclosed in inside and is fixedly connected with the pile top reinforcing bar by vertical section of pile top reinforcing bar, and described rod iron stretches out and is positioned at outside the end face of pile top.
In said structure, the concrete of described pile body and pile top comprises cement, admixture, sandstone, corrosion-resistant agent, water reducing agent and water.Wherein, described corrosion-resistant agent comprises barium hydroxide, natrium citricum, boric acid, calgon, Sodium Benzoate, neopelex, ten disulfo sodium sulphate, silica sand; Described admixture comprises flyash, breeze, silicon ash, metakaolin; Described water reducing agent comprises naphthalene system, polycarboxylic acids, polycarboxylic acids grafting side chain, naphthalene system's improvement (being formed by naphthalene water reducer and other additive complex).
Preferably, described pile top is positive truncated rectangular pyramids shape, and described rod iron is positioned at the center of positive truncated rectangular pyramids, and the front end of rod iron stretches out outside the pile top end face; Be provided with four groups of pile top reinforcing bars in described pile top, the angle between two adjacent groups pile top reinforcing bar is 90 °, and the tilting section of every group of pile top reinforcing bar is parallel to a side of pile top.
Preferably, described pile body has columnar mesopore, has the circular hole identical with the median pore diameter of square pile on end plate; Describedly wear muscle hole and stretch-draw pore size distribution in the circular hole outside of end plate the distribution that is square.
Wherein, on described band steel skirtboard, be pressed with some convex tendons, described convex tendon is outstanding to the center of hollow square pile.
In said structure, the length of side of described end plate, all identical with the pile body length of side of hollow square pile with the length of side of steel skirtboard.Perhaps, the length of side of end plate is less than the pile body length of side of hollow square pile, and described band steel skirtboard is stepped, and its part length of side near pile body is identical with the pile body length of side of hollow square pile, is less than the pile body length of side of hollow square pile near the part length of side of end plate.
Wherein, described negative electrode cushion block is embedded in the intersection of end plate, skirtboard and square pile end in advance.
The corrosion-resistant hollow square pile of prestressed centrifugally of the present utility model is from the angle of building pile foundation integral protection; research and design to pile foundation overall durability and corrosion resistance; optimize concrete constituent and the proportioning of square pile pile body; and adjust square pile form of reinforcement and protective layer thickness etc.; improve durability and the decay resistance of centrifugal stream curing preformed pile and pile foundation, solved concrete, the steel concrete problem in application life in corrosive medium and environment.Improved the safety of constructional materials and building foundation.
The accompanying drawing explanation
Fig. 1 is the schematic perspective view of corrosion-resistant hollow square pile described in the utility model;
Fig. 2 is the enlarged diagram of pile top;
Fig. 3 is the longitudinal cross-section schematic diagram through the square pile center line;
Fig. 4 is the transverse sectional view at pile top place;
Fig. 5 is the top view of square pile;
Fig. 6 is a kind of schematic diagram of end connecting structure;
Fig. 7 is the another kind of schematic diagram of end connecting structure;
Fig. 8 is the sectional view of end plate;
Fig. 9 is the partial enlarged drawing of the bevel for welding on end plate;
Figure 10 is the schematic diagram of joint protective structure.
Wherein description of reference numerals is as follows:
1 is pile body; 2 is pile top; 3 is main muscle; 4 is the pile top reinforcing bar; 5 is round steel; 6 is end plate; 7 is band steel skirtboard; 8 is bevel for welding; 9 for wearing the muscle hole; 10 is the stretch-draw hole; 11 is convex tendon; 12 is weld; 13 is the negative electrode cushion block; 14 is corrosion-inhibiting coating; The length of side that L1 is end plate; L2 is the pile body length of side; W is the bevel for welding width.
The specific embodiment
Below in conjunction with accompanying drawing and the specific embodiment, the utility model is described in further detail.
The corrosion-resistant hollow square pile of the prestressed centrifugally that the utility model provides, as shown in Figure 1, comprise pile body 1, stake end, end connecting structure and joint protective structure, can comprise pile top 2 in addition.
As shown in Figure 2, described pile top 2 is positioned at the front end of pile body 1, and with pile body 1 be overall structure, the front end of described pile top 2 is provided with rod iron (as round steel 5 or square steel).As shown in Figure 2 and Figure 3, pile top 2 is positive truncated rectangular pyramids shape, and described round steel 5 or square steel are positioned at the center of positive truncated rectangular pyramids, and the front end of round steel 5 or square steel stretches out outside pile top 2 end faces.As shown in Figure 4, be provided with four groups of pile top reinforcing bars 4 in pile top 2, the angle between two adjacent groups pile top reinforcing bar 4 is 90 °, and every group of pile top reinforcing bar 4 comprises vertically section of a tilting section and, each tilting section is parallel to a side of pile top, and described round steel 5 or square steel are enclosed in inside by vertical section.
As shown in Figure 1, the bottom surface of pile top 2 is identical with the cross section of square pile pile body 1.Square pile pile body master muscle 3 positions are provided with the reinforcing bar that is parallel to the square pile central axis, as shown in Figure 3, can increase its anti-bending strength and penetrability.The tilting section of pile top reinforcing bar 4 is connected with distributing bar, and described distributing bar is parallel to the main muscle 3 of square pile pile body and is positioned at the square pile pile body.
As shown in Fig. 6, Fig. 7, Fig. 8, end connecting structure comprises end plate 6 and band steel skirtboard 7, described end plate 6 is located at the end of hollow square pile and is connected with the main muscle 3 of pile body 1, the side of described end plate 6 has bevel for welding 8, end plate 6 is provided with wears muscle hole 9 and stretch-draw hole 10, describedly wear muscle hole 9 and stretch-draw hole 10 is centrosymmetric with end plate 6 centers, described band steel skirtboard 7 links together with end plate 6, and this is located at the pile body connecting portion of end plate 6 and hollow square pile with steel skirtboard 7.
Described joint protective structure comprises corrosion-inhibiting coating 14 and/or negative electrode cushion block 13, and wherein negative electrode cushion block 13 is embedded in the end of hollow square pile in advance, and corrosion-inhibiting coating 14 is coated on the joint of pile body 1 and the weld of end plate 6 and end plate 12 is enclosed in to its inside.
The concrete of described pile body 1 and pile top 2 adopts the concrete of identical proportioning, and together centrifugal forming and maintenance, comprise cement, admixture (admixture A, B, C represent respectively breeze, flyash and silicon ash), sandstone, corrosion-resistant agent, water reducing agent and water, its composition proportion sees the following form.
Aforementioned concrete has higher corrosion resistance, and in the chloride environment of different brackets corrodes, the electric flux Properties Control is at 100C～1000C; Chloride diffusion coefficient is controlled at 0.9 * 10
-12～3.0 * 10
-12m
2/ s; In the sulfate ion environmental attack of different brackets, more than the resisting erosion of sulfate grade is controlled at KS90～KS150; In the severe cold environment of different brackets corrodes, more than freeze proof grade is controlled at F300～F400.
Wherein, described corrosion-resistant agent comprises barium hydroxide, natrium citricum, boric acid, calgon, Sodium Benzoate, neopelex, ten disulfo sodium sulphate, silica sand; Described admixture comprises flyash, breeze, silicon ash, metakaolin; Described water reducing agent comprises naphthalene system, polycarboxylic acids, naphthalene system improvement (being formed by naphthalene water reducer and other additive complex), polycarboxylic acids grafting side chain.
As shown in Figure 4, Figure 5, have columnar mesopore in hollow square pile, be evenly distributed with main muscle 3 in the outside of mesopore, in the utility model, main muscle 3 is eight, and described main muscle 3 is square and distributes and parallel with the middle axially bored line of square pile.There is the circular hole identical with the median pore diameter of square pile on end plate 6, wear muscle hole 9 and stretch-draw hole 10 and be square and be distributed in the end plate circular hole outside, and be centrosymmetric with the center of end plate 6.Band steel skirtboard 7 links together by welding and mechanical die mould with end plate 6, and to be pressed with some convex tendon 11(on band steel skirtboard 7 be two convex tendons in the utility model), as shown in Figure 6, Figure 7, convex tendon 6 is given prominence to the center of hollow square pile.
Wherein, the length of side L1 of end plate 6, with pile body 1 length of side L2 of the length of side of steel skirtboard 7 and hollow square pile all identical (basic identical), as shown in Figure 6.Perhaps, end plate 6 adopts stake end undergauge technology, and as shown in Figure 7, the length of side L1 of end plate 6 is less than pile body 1 length of side L2 of hollow square pile, and square pile, with after square pile is connected, is smeared corrosion-inhibiting coating 14 by this zone at the stake interface.Stepped with the band steel skirtboard 7 that end plate 6 is connected, its part length of side near pile body 1 is identical with the pile body length of side L2 of hollow square pile, be less than the pile body length of side L2 of hollow square pile near the part length of side of end plate 6, wherein preferred, with the two-part junction of the steel skirtboard 2 different length of sides between the joint face of end plate and end plate apart from being 15mm～25mm.
As shown in Figure 9, the corrosion-resistant hollow square pile that the square pile pile body length of side is 300mm～500mm, when design life is 50 years, the bevel for welding width W is that 12mm gets final product; When design life is 100 years, the bevel for welding width W is that 15mm gets final product.And the corrosion-resistant hollow square pile that the square pile pile body length of side is 550～1000mm, when design life is 50 years and 100 years, the bevel for welding width W is 15mm and gets final product, and makes like this bonding area between end plate increase.
In said structure, the square pile joint can adopt separately the protection method of corrosion-inhibiting coating 14 according to different corrosive environments and classification, also can adopt separately the protection method of negative electrode cushion block 13, can also adopt the mode of the two combination.
By the electrochemical corrosion principle, can be obtained, the corrosion rate of weld 12 is not more than the corrosion rate of end plate 6, total throat thickness of end plate 6 should meet every mechanical property of square pile simultaneously, therefore in order to guarantee that corrosion-resistant hollow square pile meets the required mechanical property of corrosion-resistant hollow square pile in the designed corrosion time limit, need to design according to correlative factor the throat thickness of end plate.End plate can be reserved corrosion thickness according to design period and the corrosion-resistant scheme adopted, and increases throat thickness.Improve corrosive nature and the endurance quality of corrosion-resistant hollow square pile.Varying environment situation and stake type, its corrosion rate and corrosion thickness (according to the rule formula in " port works Code for design of steel structures ", being designed) are as follows:
Conventional coating initial stage coating damage coefficient should be in water 1%～2%, and in mud 25%～50%, the coating damage rate be annual increase by 1%～3%.Protected area should comprise metal construction in water and the area in mud, and should consider to affect the area (comprising end plate, reinforcing bar pier nose etc.) of other metal construction of metal construction cathodic protection effect.According to the end plate thickness of square pile and the width of skirtboard, each termination of square pile of the various length of sides is calculated result of calculation (being designed according to the rule formula in " Hydraulic Metal anti-corrosion code ") as follows with the area contacted of water.
Therefore; cathodic protection is that the skirtboard that sacrificial anode is made suitable thickness according to different quality (increases thickness of slab; meet welding and connection request) (thickness is below 1.5mm to replace original skirtboard; can't meet the requirements such as welding and connection); be used for guaranteeing laying of negative electrode cushion block, the sacrificial anode quality (being designed according to the rule formula) of the utility model design is as follows:
Preferably, as shown in figure 10, negative electrode cushion block 5 is embedded in the intersection of end plate 2, skirtboard 3 and square pile 1 end in advance.
Wherein, corrosion-inhibiting coating 14 comprises rustproof paint, organosilicon osmosis type coating, epoxy resin, polyurethane water-proof paint and pitch.The formation method of this corrosion-inhibiting coating is surface filming formula, infiltration type or closed, wherein the surface filming formula is that corrosion-inhibiting coating forms protecting film on the square pile surface, play the effect be hedged off from the outer world, infiltration type is that corrosion-inhibiting coating penetrates into pile body inside, tamp the capillary hole of pile body, make pile body surface more closely knit, external substance can't infiltrate into its inside, and closed be the combination of surface filming formula and infiltration type, best results.
In hollow square pile of the present utility model, hollow square pile pile top and pile body are overall structure, there do not is obvious tie point, there is no space, can effectively resist the erosion of corrosive medium, there is superior decay resistance, and pile top and pile body adopt the concrete of identical proportioning, can by with batch stirring, centrifugal and maintenance forms.Simultaneously, end plate has bevel for welding, can increase bonding area and height between end plate and end plate according to model and the life requirements design of square pile environment for use and square pile, has improved the pre-etching amount of weld.In addition, the protection of welded joints structure adopts cathode protection technology and corrosion-inhibiting coating technology, can adopt one or more protection structures according to different corrosive environments and classification, so just can improve durability and the decay resistance of square pile joint.The utility model has improved durability and the decay resistance of centrifugal stream curing preformed pile and pile foundation, and the safety of constructional materials and building foundation is improved.
Abovely by specific embodiment, the utility model is had been described in detail, this embodiment is only preferred embodiment of the present utility model, and it is not limited the utility model.In the situation that do not break away from the utility model principle, equivalent replacement and improvement that those skilled in the art makes square pile structure of the present utility model, in the technology category that all should be considered as protecting at the utility model.
Claims (8)
1. the corrosion-resistant hollow square pile of prestressed centrifugally, is characterized in that, comprises pile body, stake end, end connecting structure and joint protective structure,
Described end connecting structure comprises end plate and band steel skirtboard, described end plate is located at the end of hollow square pile and is connected with the main muscle of pile body, the side of described end plate has bevel for welding, end plate is provided with wears muscle hole and stretch-draw hole, describedly wear the muscle hole and the stretch-draw hole is centrosymmetric with the end plate center, described band steel skirtboard and end plate link together, and this is located at the pile body connecting portion of end plate and hollow square pile with the steel skirtboard;
Described joint protective structure comprises corrosion-inhibiting coating and/or negative electrode cushion block, and wherein the negative electrode cushion block is embedded in the end of hollow square pile in advance, and corrosion-inhibiting coating is coated on the joint of pile body and the weld of end plate and end plate is enclosed in to its inside.
2. the corrosion-resistant hollow square pile of prestressed centrifugally according to claim 1, it is characterized in that, described square pile also comprises pile top, this pile top be positioned at the concrete hollow square pile pile body front end and with pile body be overall structure, described pile top is terrace with edge shape, be provided with the pile top reinforcing bar in pile top, every group of pile top reinforcing bar comprises vertically section of a tilting section and, the front end of pile top is provided with a rod iron, described rod iron is enclosed in inside and is fixedly connected with the pile top reinforcing bar by vertical section of pile top reinforcing bar, and described rod iron stretches out and is positioned at outside the end face of pile top.
3. the corrosion-resistant hollow square pile of prestressed centrifugally according to claim 2, is characterized in that, described pile top is positive truncated rectangular pyramids shape, and described rod iron is positioned at the center of positive truncated rectangular pyramids, and the front end of rod iron stretches out outside the pile top end face; Be provided with four groups of pile top reinforcing bars in described pile top, the angle between two adjacent groups pile top reinforcing bar is 90 °, and the tilting section of every group of pile top reinforcing bar is parallel to a side of pile top.
4. the corrosion-resistant hollow square pile of prestressed centrifugally according to claim 1, is characterized in that, described pile body has columnar mesopore, has the circular hole identical with the median pore diameter of square pile on end plate; Describedly wear muscle hole and stretch-draw pore size distribution in the circular hole outside of end plate the distribution that is square.
5. the corrosion-resistant hollow square pile of prestressed centrifugally according to claim 1, is characterized in that, on described band steel skirtboard, is pressed with some convex tendons, and described convex tendon is outstanding to the center of hollow square pile.
6. the corrosion-resistant hollow square pile of prestressed centrifugally according to claim 1, is characterized in that, the length of side of described end plate, all identical with the pile body length of side of hollow square pile with the length of side of steel skirtboard.
7. the corrosion-resistant hollow square pile of prestressed centrifugally according to claim 1, it is characterized in that, the length of side of described end plate is less than the pile body length of side of hollow square pile, described band steel skirtboard is stepped, its part length of side near pile body is identical with the pile body length of side of hollow square pile, is less than the pile body length of side of hollow square pile near the part length of side of end plate.
8. the corrosion-resistant hollow square pile of prestressed centrifugally according to claim 1, is characterized in that, described negative electrode cushion block is embedded in the intersection of end plate, skirtboard and square pile end in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320308155.2U CN203373739U (en) | 2013-05-30 | 2013-05-30 | Prestress centrifugal corrosion resistant hollow square pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320308155.2U CN203373739U (en) | 2013-05-30 | 2013-05-30 | Prestress centrifugal corrosion resistant hollow square pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203373739U true CN203373739U (en) | 2014-01-01 |
Family
ID=49836284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320308155.2U Expired - Fee Related CN203373739U (en) | 2013-05-30 | 2013-05-30 | Prestress centrifugal corrosion resistant hollow square pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203373739U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321218A (en) * | 2013-05-30 | 2013-09-25 | 上海大禺预制构件有限公司 | Prestressed centrifugal corrosion-resistant hollow square pile |
| CN104179175A (en) * | 2014-09-04 | 2014-12-03 | 德翰智慧科技有限公司 | Prestressed concrete pipe pile device having anticorrosion function |
| CN104358257A (en) * | 2014-11-13 | 2015-02-18 | 中船第九设计研究院工程有限公司 | Reinforced connection method for PHC (prestress high concrete) tubular pile |
-
2013
- 2013-05-30 CN CN201320308155.2U patent/CN203373739U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321218A (en) * | 2013-05-30 | 2013-09-25 | 上海大禺预制构件有限公司 | Prestressed centrifugal corrosion-resistant hollow square pile |
| CN103321218B (en) * | 2013-05-30 | 2016-01-27 | 上海大禺预制构件有限公司 | Prestressed centrifugally Corrosion-resistant hollow square pile |
| CN104179175A (en) * | 2014-09-04 | 2014-12-03 | 德翰智慧科技有限公司 | Prestressed concrete pipe pile device having anticorrosion function |
| CN104358257A (en) * | 2014-11-13 | 2015-02-18 | 中船第九设计研究院工程有限公司 | Reinforced connection method for PHC (prestress high concrete) tubular pile |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203782564U (en) | Thin-layer modified polyurethane steel bridge deck pavement structure | |
| CN103321218B (en) | Prestressed centrifugally Corrosion-resistant hollow square pile | |
| WO2021082768A1 (en) | Novel template-free anti-corrosion uhpc-nc combined bearing platform and construction method therefor | |
| CN103332890A (en) | Corrosion-resistant hollow square pile concrete | |
| CN203373739U (en) | Prestress centrifugal corrosion resistant hollow square pile | |
| CN107304634A (en) | A kind of high strength stainless steel silk screen strengthens ECC reinforced concrete structures | |
| CN109678414A (en) | A kind of porous mortar of flush type composite sacrificial anode and preparation method thereof | |
| CN104496270A (en) | Waterproof building material | |
| Liu | Damage to concrete structures in a marine environment | |
| CN110056128B (en) | Light assembled stiffening box groove type FRP (fiber reinforce Plastic) section sea sand concrete beam | |
| CN203373742U (en) | Corrosion resistance hollow square pile tip | |
| CN101607808A (en) | Dam concrete and preparation method | |
| CN103334425B (en) | Joint protection structure of anti-corrosion hollow square pile | |
| CN203361135U (en) | Adapter protection structure of corrosion-resistant hollow square pile | |
| CN104498963B (en) | Maritime concrete flush type high activity sacrificial anode | |
| Pan et al. | Effects of environmental Water-Level changes and bidirectional electromigration rehabilitation on durability of concrete | |
| CN205776191U (en) | A kind of stake for port and pier permanent support | |
| CN203373765U (en) | Bearing platform connecting structure of corrosion resistance hollow square pile | |
| CN211772846U (en) | Composite rib-composite material grid seawater sea sand bridge deck | |
| CN211178112U (en) | Cement-based cooling tower anticorrosion and waterproof system | |
| CN114169048A (en) | Durability design method for reinforced concrete bridge in high-concentration saline-alkali environment | |
| CN203361134U (en) | End connection device of corrosion-resistant hollow square pile | |
| CN106948550A (en) | A kind of FRP tube nucleus heart reinforcing bar sea sand concrete columns | |
| CN103321219B (en) | Corrosion-resistant hollow square pile tip | |
| CN201952799U (en) | Fiber reinforced composite deepwater composite pile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20140101 Termination date: 20180530 |