CN209873803U - Seawater corrosion resistant reinforced concrete structure and construction structure - Google Patents
Seawater corrosion resistant reinforced concrete structure and construction structure Download PDFInfo
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- CN209873803U CN209873803U CN201920111523.1U CN201920111523U CN209873803U CN 209873803 U CN209873803 U CN 209873803U CN 201920111523 U CN201920111523 U CN 201920111523U CN 209873803 U CN209873803 U CN 209873803U
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Abstract
The utility model discloses an anti seawater corrosion's reinforced concrete structure and construction structures relates to coastal reinforced concrete structure field, including ordinary reinforced concrete layer, ordinary reinforced concrete layer is equipped with the dismantlement-free metal mold board all around outside the side, and ultra high performance concrete layer is located dismantlement-free metal mold board lateral surface and ordinary concrete layer bottom and top. The common reinforced concrete layer bears the load borne by the structure, and the ultra-high performance concrete layer resists the erosion in the chloride ions in the seawater, so that the seawater corrosion resistance of the structure can be improved, and the service life of the structure can be prolonged. The utility model provides a reinforced concrete construction structures, it is convenient for pour aforementioned reinforced concrete structure fast.
Description
Technical Field
The utility model relates to a coastal reinforced concrete structure field, especially an anti seawater corrosion's reinforced concrete structure still provides an anti seawater corrosion's reinforced concrete construction structures.
Background
The reinforced concrete structure has higher bearing capacity due to the combination of the advantages of high compressive strength and tensile strength of concrete, and good bonding between the steel bar and the concrete, and is widely applied to coastal engineering construction. However, the chlorine ions in the seawater can enter the concrete through the micropores of the concrete and react with alkaline substances such as calcium hydroxide in the concrete to gradually reduce the pH value in the concrete to below 9, so that the passive film on the surface of the steel bar in the concrete is gradually damaged and the steel bar is corroded. After the reinforcing steel bar is corroded, the volume of the concrete protective layer expands, so that the concrete protective layer with lower tensile strength is burst, peeled and damaged, the bond between the reinforcing steel bar and the concrete is damaged, the stressed section of the reinforcing steel bar is reduced, the bearing capacity and the durability of a reinforced concrete structure are reduced, and even the reinforced concrete structure is damaged.
In order to improve the chlorine ion invasion resistance of a reinforced concrete structure of coastal engineering, prevent the reinforced concrete structure from being damaged prematurely due to seawater corrosion, improve the durability of the reinforced concrete structure and prolong the service life of coastal engineering, the main technical measure at present is to adopt seawater corrosion resistant concrete; the seawater corrosion resistant concrete is prepared by additionally adding admixture such as ground slag, silica powder and the like and additive into common concrete, and the manufacturing cost of the seawater corrosion resistant concrete is more than 30% higher than that of the common concrete. An ultra-high performance cement-based material developed at home and abroad in recent years, namely ultra-high performance concrete (UHPC for short), has ultra-high strength and durability, the compressive strength of the ultra-high performance cement-based material reaches 150MPa, the impermeability exceeds P30, the electric flux is lower than 40C, the sulfate resistance exceeds KS150, the frost resistance exceeds F500, the service life of the ultra-high performance concrete possibly reaches 200 years, the ultra-high performance concrete is applied to marine environmental engineering at present, but the cost is high, the unit price is 5-10 times of that of common concrete, and the popularization and application are restricted.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an anti seawater corrosion's reinforced concrete structure bears the load that the structure receives by inside ordinary reinforced concrete layer, keeps out the erosion that chlorine in the sea water leaves by outlying ultra high performance concrete layer, can improve the anti seawater corrosion ability of structure, the life of extension structure, can reduce the construction cost of coastal reinforced concrete structure engineering again
Also provided is a seawater corrosion resistant reinforced concrete construction structure which facilitates rapid casting of the aforementioned reinforced concrete structure.
The utility model provides a solution of its technical problem is: the seawater corrosion resistant reinforced concrete structure comprises a common reinforced concrete layer, wherein a layer of ultrahigh-performance concrete layer is arranged at the top end and the bottom end of the common reinforced concrete layer respectively, a disassembly-free metal formwork is arranged outside the peripheral side surface of the common reinforced concrete layer, and the ultrahigh-performance concrete layer is arranged outside the disassembly-free metal formwork.
As a further improvement of the technical scheme, the thickness of the ultra-high performance concrete layer is 30-50 mm.
The reinforced concrete construction structure capable of resisting seawater corrosion comprises a steel reinforcement cage which is erected on a common concrete cushion layer, wherein non-dismantling metal formworks are laid on the outer side of the periphery of the steel reinforcement cage, peripheral formworks are laid on the outer sides of the non-dismantling metal formworks, an ultrahigh-performance concrete pouring space is formed between the non-dismantling metal formworks and the peripheral formworks, a common concrete layer pouring space is formed inside the non-dismantling metal formworks, a plurality of common concrete cushion blocks are laid between the non-dismantling metal formworks and the steel reinforcement cage, and gaps exist between adjacent common concrete cushion blocks.
As a further improvement of the technical scheme, a plurality of ultrahigh-performance concrete cushion blocks are laid between the disassembly-free metal template and the peripheral template, a gap exists between every two adjacent ultrahigh-performance concrete cushion blocks, and the ultrahigh-performance concrete cushion blocks and the common concrete cushion blocks are arranged in a staggered mode.
As a further improvement of the technical scheme, a plurality of ultrahigh-performance concrete cushion blocks are laid between the disassembly-free metal template at the lowest layer and the common concrete cushion layer, and gaps exist between the adjacent ultrahigh-performance concrete cushion blocks.
As a further improvement of the technical scheme, the distance between the disassembly-free metal template and the stressed steel bar in the steel bar cage is 30-50 mm.
The utility model has the advantages that: the utility model discloses an inside ordinary reinforced concrete layer bears the load that the structure receives, keeps out the erosion in the chlorine ion in the sea water by outlying ultra high performance concrete layer, can improve the anti sea water corrosion ability of structure, the life of extension structure, can reduce the construction cost of coastal reinforced concrete structure engineering again. The utility model provides a reinforced concrete construction structures, it is convenient for pour aforementioned reinforced concrete structure fast.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.
FIG. 1 is a schematic longitudinal sectional view of a reinforced concrete structure according to the present invention;
fig. 2 is a cross-sectional schematic view of a reinforced concrete structure of the present invention.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned herein do not mean that the components are directly connected, but mean that a better coupling structure can be formed by adding or reducing coupling accessories according to specific implementation conditions.
Referring to fig. 1 to 2, the seawater corrosion resistant reinforced concrete structure comprises a common reinforced concrete layer 4, wherein a layer of ultra-high performance concrete layer 1 is respectively arranged at the top end and the bottom end of the common reinforced concrete layer 4, a non-dismantling metal formwork 2 is arranged outside the peripheral side surface of the common reinforced concrete layer 4, and the ultra-high performance concrete layer 1 is arranged outside the non-dismantling metal formwork 2. The reinforced concrete structure can be a beam, a plate and a column, and can also be a pier, a wall and a foundation. The common reinforced concrete layer 4 in the reinforced concrete structure mainly acts to bear the load borne by the structure, the ultra-high performance concrete layer 1 mainly acts to resist seawater corrosion, and the non-dismantling metal formwork 2 mainly plays a role in separating and molding two types of concrete and avoiding mixing materials.
The bearing requirement of the reinforced concrete structure is to design common reinforced concrete in the seawater corrosion resistant reinforced concrete structure, and determine the mechanical index requirements of specification, arrangement distance, strength and the like of reinforcing steel bars in the common reinforced concrete in the seawater corrosion resistant reinforced concrete structure.
After the size of a common reinforced concrete layer 4 in a reinforced concrete structure is determined, a layer of ultra-high performance concrete layer 1 with the thickness of 30-50 mm is arranged on the periphery of the common reinforced concrete layer 4, the ultra-high performance concrete layer 1 can be a concrete structure with reinforcing steel bars or a concrete structure without reinforcing steel bars, the ultra-high performance concrete layer 1 is poured by UHPC, wherein a layer of non-dismantling metal formwork 2 is arranged on the periphery of the common reinforced concrete layer 4, the non-dismantling metal formwork 2 is not arranged at the bottom and the top of the common reinforced concrete layer 4, and the distance between the non-dismantling metal formwork 2 on the periphery and the stressed reinforcing steel bars in the reinforcement cage is 30-50 mm.
The utility model provides a reinforced concrete construction structure of anti seawater corrosion, includes steel reinforcement cage 3 of founding on ordinary concrete cushion, exempt from to tear open metal forming board 2 has been laid to the outside all around of steel reinforcement cage 3, exempt from to tear open metal forming board 2 outside and laid and have been equipped with peripheral template, form ultra high performance concrete pouring space between exempt from to tear open metal forming board 2 and the peripheral template, exempt from to tear open metal forming board 2 inside and form ordinary concrete layer pouring space, lay polylith ordinary concrete cushion between exempt from to tear open metal forming board 2 and the steel reinforcement cage 3, there is the clearance between the adjacent ordinary concrete cushion. The gap between two adjacent common concrete cushion blocks is 0.8-1.5 m. Preferably, the gap is 1 m.
In order to ensure the distance between the disassembly-free metal template 2 and the peripheral template, a plurality of ultrahigh-performance concrete cushion blocks are laid between the disassembly-free metal template 2 and the peripheral template, a gap exists between every two adjacent ultrahigh-performance concrete cushion blocks, and the ultrahigh-performance concrete cushion blocks and the common concrete cushion blocks are arranged in a staggered mode. The clearance between two adjacent ultrahigh-performance concrete cushion blocks is 0.8-1.5 m. Preferably, the gap is 1 m.
In order to rapidly pour the layer of the ultra-high performance concrete layer 1 at the bottom, a plurality of ultra-high performance concrete cushion blocks are laid between the disassembly-free metal template 2 at the lowest layer and the common concrete cushion layer, gaps exist between the adjacent ultra-high performance concrete cushion blocks, and the gaps are communicated with the ultra-high performance concrete pouring space at the bottom and the common concrete layer pouring space.
A construction method of reinforced concrete resisting seawater corrosion comprises the following steps,
1) pouring a common concrete cushion layer on the soft foundation or the rock foundation, and measuring and releasing the position of the reinforced concrete structure, the position of the reinforcement cage 3 and the position of the non-dismantling metal template 2 on the common concrete cushion layer;
2) binding the processed and manufactured steel bars according to the measured positions to form a steel bar cage 3;
3) installing a non-dismantling metal formwork 2 on the outer side of the periphery of the reinforcement cage 3, and filling a plurality of common concrete cushion blocks between the reinforcement cage 3 and the non-dismantling metal formwork 2;
4) installing a peripheral template on the outer side of the disassembly-free metal template 2;
5) pouring a layer of ultra-high performance concrete on the common concrete cushion layer, wherein the ultra-high performance concrete at the bottom covers the space in the non-dismantling metal formwork 2 and the space between the non-dismantling metal formwork 2 and the peripheral formwork;
6) after the ultra-high performance concrete layer 1 at the bottom is poured, firstly pouring a layer of common concrete into the non-dismantling metal formwork 2, then pouring a layer of ultra-high performance concrete between the peripheral formwork and the non-dismantling metal formwork 2, alternately pouring until reaching a preset position, then pouring a layer of ultra-high performance concrete covering the space in the dismantling metal formwork and the space between the non-dismantling metal formwork 2 and the peripheral formwork, and then sealing the roof.
In order to ensure the distance between the non-dismantling metal formwork 2 and the peripheral formwork, in the step 4), a plurality of ultrahigh-performance concrete cushion blocks are arranged between the non-dismantling metal formwork 2 and the peripheral formwork.
An ultra-high performance concrete cushion block with the thickness of 30-50 mm is arranged between the disassembly-free metal template 2 and the peripheral template every 1m, and a common concrete cushion block with the thickness of 30-50 mm is arranged between the reinforcement cage 3 and the disassembly-free metal template 2 every 1 m.
In order to quickly pour the layer of the ultra-high performance concrete layer 1 at the bottom, a plurality of ultra-high performance concrete cushion blocks are arranged between the disassembly-free metal template 2 at the lowest layer and the common concrete cushion layer in the step 3).
In order to facilitate the installation and reinforcement of the steel bars, the non-dismantling metal formwork 2 and the peripheral formwork and the pouring of the ultra-high performance concrete, a construction joint is arranged every 3m along the height direction of the reinforced concrete structure, and the ultra-high performance concrete is poured in the range of 30 mm-50 mm at the top of the concrete at the lower layer of the construction joint and in the range of 30 mm-50 mm at the bottom of the concrete at the upper layer of the construction joint.
And after the ultrahigh-performance concrete reaches the preset strength, removing the peripheral template to obtain the seawater corrosion resistant reinforced concrete structure.
The reinforced concrete construction method of the present invention will be described in detail below by taking the bottom plate structure as an example.
1) In order to facilitate the construction of the seawater corrosion resistant reinforced concrete structure, a flat common concrete cushion is poured on a soft foundation or a rock foundation at the structural position of the bottom plate, and the position of the reinforced concrete structure and the position of a steel bar inside the structure are measured and released on the common concrete cushion so as to avoid the removal of the metal template 2.
2) And binding the processed and manufactured steel bars according to the measured positions to form a steel bar cage 3.
3) After the steel bars are installed and meet the requirements, the disassembly-free metal templates 2 are installed around the steel bar cage 3, and common concrete cushion blocks with the thickness of 30-50 mm are filled between the steel bar cage 3 and the disassembly-free metal templates 2 every 1m to fix the positions of the disassembly-free metal templates 2 and ensure that the distance between the disassembly-free metal templates 2 and the steel bar cage 3 meets the design requirements.
4) After the non-dismantling metal formwork 2 is installed and meets the requirements after the installation, the peripheral formwork is installed, an ultra-high performance concrete cushion block with the thickness of 30-50 mm is arranged between the non-dismantling metal formwork 2 and the peripheral formwork every 1m, the ultra-high performance concrete cushion block is made of ultra-high performance concrete, and the position of the ultra-high performance concrete cushion block is arranged in a staggered mode with the ordinary concrete cushion block between the non-dismantling metal formwork 2 and the reinforcement cage 3.
5) After the peripheral templates are installed and the experience is collected to meet the requirements, concrete pouring can be carried out; when the concrete is poured, the ultra-high performance concrete with the thickness of 30 mm-50 mm at the bottom is poured firstly, and the ultra-high performance concrete at the bottom covers the space in the non-dismantling metal formwork 2 and the space between the non-dismantling metal formwork 2 and the peripheral formwork.
6) After the ultra-high performance concrete with the thickness of 30-50 mm at the bottom is completely poured, common concrete with the thickness of 30-50 cm in the non-dismantling metal formwork 2 is poured firstly, then the ultra-high performance concrete with the thickness of 30-50 cm between the peripheral formwork and the non-dismantling metal formwork 2 is poured for 30-50 cm, the circulation is carried out according to the above steps, the concrete is poured to the position 30-50 mm away from the top surface of the structure, and then a layer of the ultra-high performance concrete with the thickness of 30-50 mm is poured.
7) And after the concrete pouring is finished and reaches a certain strength, removing the peripheral template to build the sea corrosion resistant reinforced concrete structure.
8) In order to facilitate the installation and reinforcement of the steel bars, the non-dismantling metal formwork 2 and the peripheral formwork and the pouring of the ultrahigh-performance concrete, when the seawater corrosion resistant reinforced concrete structure is constructed, a construction joint is arranged every 3m in height. And pouring ultrahigh-performance concrete in the range of 30-50 mm at the top of the lower layer concrete of the construction joint and in the range of 30-50 mm at the bottom of the upper layer concrete.
9) Because the distance between the peripheral template and the non-dismantling metal template 2 is only 30 mm-50 mm, the ultra-high performance concrete is conveyed into a warehouse by adopting a hose of about 25 mm.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.
Claims (6)
1. A seawater corrosion resistant reinforced concrete structure is characterized in that: the concrete formwork comprises a common reinforced concrete layer, wherein the top end and the bottom end of the common reinforced concrete layer are respectively provided with a layer of ultra-high performance concrete layer, the peripheral side surfaces of the common reinforced concrete layer are externally provided with disassembly-free metal formworks, and the disassembly-free metal formworks are externally provided with the ultra-high performance concrete layer.
2. The seawater corrosion resistant reinforced concrete structure of claim 1, wherein: the thickness of the ultra-high performance concrete layer is 30 mm-50 mm.
3. The utility model provides an anti seawater corrosion's reinforced concrete construction structures which characterized in that: the concrete cushion is characterized by comprising a steel reinforcement cage which is erected on a common concrete cushion, wherein non-dismantling metal formworks are laid on the outer side of the periphery of the steel reinforcement cage, peripheral formworks are laid on the outer sides of the non-dismantling metal formworks, an ultrahigh-performance concrete pouring space is formed between the non-dismantling metal formworks and the peripheral formworks, a common concrete layer pouring space is formed inside the non-dismantling metal formworks, a plurality of common concrete cushions are laid between the non-dismantling metal formworks and the steel reinforcement cage, and gaps exist between adjacent common concrete cushions.
4. The seawater corrosion resistant reinforced concrete construction structure of claim 3, wherein: a plurality of ultrahigh-performance concrete cushion blocks are laid between the disassembly-free metal template and the peripheral template, gaps exist between every two adjacent ultrahigh-performance concrete cushion blocks, and the ultrahigh-performance concrete cushion blocks and the common concrete cushion blocks are arranged in a staggered mode.
5. The seawater corrosion resistant reinforced concrete construction structure of claim 3, wherein: a plurality of ultra-high performance concrete cushion blocks are laid between the disassembly-free metal template positioned at the lowest layer and the common concrete cushion layer, and gaps exist between the adjacent ultra-high performance concrete cushion blocks.
6. The seawater corrosion resistant reinforced concrete construction structure of claim 3, wherein: the distance between the disassembly-free metal template and the stressed steel bars in the steel bar cage is 30-50 mm.
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| CN201920111523.1U CN209873803U (en) | 2019-01-22 | 2019-01-22 | Seawater corrosion resistant reinforced concrete structure and construction structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109811768A (en) * | 2019-01-22 | 2019-05-28 | 广东水电二局股份有限公司 | A kind of reinforced concrete structure of anti-seawater corrosion, constructing structure and construction method |
| CN112049664A (en) * | 2020-08-31 | 2020-12-08 | 香港理工大学深圳研究院 | Box body structure based on perforated steel plate and preparation method thereof |
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2019
- 2019-01-22 CN CN201920111523.1U patent/CN209873803U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109811768A (en) * | 2019-01-22 | 2019-05-28 | 广东水电二局股份有限公司 | A kind of reinforced concrete structure of anti-seawater corrosion, constructing structure and construction method |
| CN112049664A (en) * | 2020-08-31 | 2020-12-08 | 香港理工大学深圳研究院 | Box body structure based on perforated steel plate and preparation method thereof |
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