CN213268585U - Confined concrete column based on sea sand seawater TRC prefabricated shell - Google Patents
Confined concrete column based on sea sand seawater TRC prefabricated shell Download PDFInfo
- Publication number
- CN213268585U CN213268585U CN202020904527.8U CN202020904527U CN213268585U CN 213268585 U CN213268585 U CN 213268585U CN 202020904527 U CN202020904527 U CN 202020904527U CN 213268585 U CN213268585 U CN 213268585U
- Authority
- CN
- China
- Prior art keywords
- trc
- corrosion
- concrete column
- concrete
- sea sand
- 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
Abstract
The utility model discloses a confined concrete column based on a TRC prefabricated shell, which comprises a TRC prefabricated shell and a core concrete column poured in the TRC prefabricated shell; the TRC prefabricated shell comprises a corrosion-resistant lining and a TRC composite material adhered to the periphery of the corrosion-resistant lining; the TRC composite material comprises fine aggregate concrete and at least one layer of fiber woven mesh pre-embedded in the fine aggregate concrete; the fine aggregate concrete is prepared from sea sand, seawater, cement and the like; the surface of the corrosion-resistant lining is provided with a plurality of hollow grouting holes, and fine aggregate concrete is filled in each hollow grouting hole; the core concrete column is made of seaside broken stone, sea sand, seawater and cement. The utility model discloses well all component materials all are able to bear or endure the marine corrosion environment, and the main raw materials can be gathered materials on the spot, and construction facility, green. The TRC prefabricated shell can be used as a pouring template of the core concrete column and can also have a restraint effect on the core concrete column, so that the total axial pressure bearing capacity is improved.
Description
Technical Field
The utility model relates to a concrete technical field, especially a confined concrete column based on sea sand sea water TRC prefabricated shell.
Background
China is advocating "sea force" and "take one road", so island reefs, sea guards, ports, docks and traffic infrastructures are being constructed on a large scale. In the construction of these civil engineering, a large amount of stones, sand and water are necessary to form the basic raw materials of the concrete material, but the stones, sand and water adopted in the common concrete are mainly materials under the fresh water environment, so as to prevent the steel bars in the common concrete structure from being corroded by corrosive media under the marine environment, rusting and being damaged. If a common concrete structure is adopted in the island construction, a large amount of stones, river sand, fresh water and the like need to be transported from inland, so that the transportation cost is extremely high; in addition, the general reinforced concrete structure has poor durability in the marine corrosive environment, and thus it is urgently needed to develop a concrete structure or member adapted to the marine corrosive environment to complete the corresponding infrastructure construction. Meanwhile, a large amount of resources such as sea stones, sea sand, sea water and the like exist in the marine environment, if the marine sand and sea water concrete can be prepared from local materials for construction, the problem of shortage of fresh water and light sand resources can be relieved, the manufacturing cost of a concrete structure can be greatly reduced, and the method has remarkable significance for marine economic development and sea island national defense construction.
In summary, there is a need to develop a novel fiber composite-concrete composite column member which is suitable for marine corrosive environment, has good stress performance, is convenient to construct, and has obvious economic benefits, so as to provide support for the construction of infrastructures such as island, sea defense and port wharf.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is not enough to above-mentioned prior art, and provide a restraint concrete column based on sea sand sea water TRC prefabricated shell, this restraint concrete column based on sea sand sea water TRC prefabricated shell adopts the TRC prefabricated shell that the sea sand sea water was made to retrain the column of congealing to can solve among the ocean island reef engineering that the structure corrosion resistance is poor, the component bearing capacity is difficult to guarantee, draw materials inconvenient and the too big scheduling problem of construction cost.
In order to solve the technical problem, the utility model discloses a technical scheme is:
a confined concrete column based on a sea sand seawater TRC prefabricated shell comprises the TRC prefabricated shell and a core concrete column poured in the TRC prefabricated shell.
The TRC prefabricated shell comprises a corrosion-resistant lining and a TRC composite material bonded to the periphery of the corrosion-resistant lining.
The TRC composite material comprises fine aggregate concrete and at least one layer of fiber woven mesh pre-buried in the fine aggregate concrete. The aggregate in the fine aggregate concrete is sea sand, and the water body mixed with the fine aggregate concrete is seawater.
A plurality of hollow grouting holes are formed in the surface of the corrosion-resistant lining, and fine aggregate concrete is filled in each hollow grouting hole.
Aggregate in the core concrete column is seaside broken stone and sea sand, and the water body mixed with the core concrete column is seawater.
The core concrete column is pre-embedded with corrosion-resistant reinforcing ribs.
The corrosion-resistant reinforcing rib is a stainless steel bar or an FRP rib.
The fiber woven mesh is a carbon fiber woven mesh or a basalt fiber woven mesh.
The surface of the fiber woven net is provided with a gum dipping layer or a reinforcing steel wire net lining.
The hollow rate on the corrosion-resistant lining is 40-60%.
The utility model discloses following beneficial effect has:
(1) the utility model discloses can draw materials on the spot, ocean resources such as make full use of sea sand sea water. For example, in fine aggregate concrete and core concrete, except cement and a water reducing agent, seawater, sea sand and seaside broken stones can be obtained from local resources, so that the transportation cost is greatly reduced. Wherein the sea sand can also be coral sand, and the sea side broken stone can also be coral stone.
(2) Is suitable for the marine salt corrosion environment and has good corrosion resistance. The materials are all corrosion-resistant materials, and seawater, sea sand or seaside broken stones in the fine aggregate concrete and the core concrete are obtained from oceans and are self corrosion-resistant. The corrosion-resistant lining, the fiber woven mesh and the corrosion-resistant reinforcing ribs can resist corrosion and have good durability.
(3) The bearing capacity is strong. The setting of fretwork grout hole in the corrosion-resistant inside lining for tensile strength between corrosion-resistant interior village and the TRC combined material is high, and the mechanicalness is good, and the ductility is good, carries out the hoop restraint to core concrete column, has improved the axle load bearing capacity of core concrete column.
(4) The demoulding is removed, the structural integrity is improved, and the construction speed is accelerated. The corrosion-resistant lining and the TRC composite material with the surface subjected to the notch hollow-out treatment not only serve as a stress constraint component of the core concrete column, but also serve as a template of the core concrete column, so that the demolding procedure is omitted, a large amount of template materials are saved, and the construction speed of a project is accelerated.
(5) The adhesive property is strong. Fretwork has been done on corrosion-resistant inside lining surface, and during the construction, the pulpous fine aggregate concrete of sand among the TRC combined material will link up fretwork grout hole, and when increasing area of contact, the pulpous fine aggregate concrete of sand also provides the certain cotter bolt power of corrosion-resistant inside lining for T ═ T1+T2＞T1Thereby the bonding performance is stronger than that of the smooth lining surface, and the bearing capacity of the concrete is improved.
(6) Is economical and practical and saves cost. Used sea sand sea water is got materials locally and has been removed the freight of big pen from, utilizes FRP combined material and ripple steel pipe etc. to retrain simultaneously for other combination posts and consolidates the restraint concrete, the utility model discloses used corrosion-resistant inside lining adopts PVC or stainless steel etc. so the cost is lower, can effectual saving cost during the construction.
Drawings
Fig. 1 is a schematic structural diagram of a column of confined concrete based on a sea sand seawater TRC prefabricated shell in a cylindrical front section.
Fig. 2 is a schematic structural diagram of a square column front section of a confined concrete column based on a sea sand seawater TRC prefabricated shell.
Fig. 3 is a schematic perspective view of a restrained concrete column of a TRC prefabricated shell based on sea sand and seawater in a cylindrical shape.
Fig. 4 is a schematic perspective view of a confined concrete column in the form of a square column based on a sea sand seawater TRC prefabricated shell.
Fig. 5 is a schematic view of the cylindrical corrosion resistant liner of fig. 3.
Fig. 6 is a schematic diagram of the construction of the corrosion resistant liner of fig. 4 in the form of a square cylinder.
Fig. 7 is a schematic illustration of the TRC pre-fabricated enclosure of fig. 3 when pre-fabricated.
Fig. 8 is a schematic view of the TRC prefabricated shell of fig. 4 when prefabricated.
Fig. 9 is a schematic view of a force analysis of the cylindrical core concrete of fig. 3.
Fig. 10 is a schematic view of force analysis of the square column-shaped core concrete of fig. 4.
Among them are:
10. a TRC composite; 11. fine aggregate concrete; 12. weaving a fiber mesh;
20. a corrosion resistant liner; 21. hollowing out grouting holes;
30. a core concrete column; 31 core concrete; 32. longitudinal ribs; 33. hooping;
41. a corrosion-resistant plastic inner membrane plate; 42. and (4) supporting by using a cross.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, "first", "second" and the like do not indicate the degree of importance of the component parts, and thus, are not to be construed as limiting the present invention. The specific dimensions used in the present embodiment are only for illustrating the technical solution, and do not limit the protection scope of the present invention.
As shown in fig. 1 to 4, a column of confined concrete based on a TRC prefabricated shell made of sea sand and seawater comprises a TRC prefabricated shell and a column of core concrete 30 poured inside the TRC prefabricated shell.
The confined concrete column can be designed as a cylinder as shown in fig. 1 and 3 or a square column as shown in fig. 2 and 4, as required.
The TRC prefabricated shell is used for restraining and reinforcing the core concrete column. The TRC prefabricated shell comprises a corrosion resistant inner lining 20 and a TRC composite 10 bonded to the periphery of the corrosion resistant inner lining. The TRC prefabricated shell is correspondingly designed into a cylindrical shape or a square cylindrical shape. When the TRC prefabricated shell is a square cylindrical shape, a circular arc chamfer is provided at each corner portion.
The TRC composite material comprises fine aggregate concrete 11 and at least one layer of fiber woven mesh 12 pre-buried in the fine aggregate concrete.
The aggregate in the fine aggregate concrete is sea sand, and the water body mixed with the fine aggregate concrete is seawater.
The number of layers of the woven fiber net 12 is preferably n, and n is a natural number; the fiber woven net is preferably a carbon fiber woven net or a basalt fiber woven net. Furthermore, the surface of the fiber woven net is provided with a dipping layer or a reinforcing steel wire net lining.
The fiber woven mesh reinforced concrete (TRC) is a composite material formed by reinforcing high-performance fine aggregate concrete by using high-performance corrosion-resistant fiber woven fabric. The high-performance fiber mesh is usually woven by corrosion-resistant fiber materials such as carbon fiber and basalt fiber, can resist corrosive media in the external environment, and is suitable for sea sand and seawater concrete and marine environment. Similarly, if corrosion-resistant fibers are used for manufacturing reinforcing bars (such as carbon fiber bars), the reinforcing bars are also suitable for sea sand and seawater concrete and in marine environments. The base body of the TRC material is generally inorganic high-performance fine aggregate concrete (mortar), and has the characteristics of high strength, good toughness, ageing resistance, high temperature resistance and the like, so that when the TRC material is used for reinforcing or restraining a concrete structure or a member, the TRC material has the advantages of good compatibility with the concrete material, good high temperature resistance and plasticity, suitability for marine corrosion environment and the like, and has application in reinforcing and repairing engineering of bridges and house buildings. Because of the corrosion resistance of the fiber woven mesh, the sea sand seawater fine aggregate concrete (mortar) containing corrosive media can be used as a matrix to form the sea sand seawater TRC composite material, so that river sand, gravel, water and other resources in a fresh water environment can be greatly saved, and the stress performance of the fiber woven mesh is the same as that of the traditional TRC composite material. In addition, a large amount of template materials are needed in the traditional concrete structure pouring process, a large amount of manpower and material resources are consumed to install and disassemble the template, and the construction time and the cost are huge. If the prefabricated TRC shell is used as a permanent template of a concrete structural member, on one hand, a large amount of template raw materials can be saved, on the other hand, the procedures of installing and disassembling the template are also saved, and the construction time and the construction cost are both greatly reduced; and the TRC prefabricated shell can be produced in batches in a factory and is suitable for the development target of building industrialization which is being promoted in China.
As shown in fig. 5 and 6, a plurality of hollow grouting holes 21 are formed in the surface of the corrosion-resistant lining, and fine aggregate concrete is filled in each hollow grouting hole.
The corrosion-resistant lining is preferably a PVC pipe or a hollow pipe made of stainless steel plates.
The thickness of the TRC prefabricated shell is about 15mm-25mm, and generally the thickness is larger when the number of layers of the fiber net in the TRC shell is larger; considering the thin-wall characteristic of the TRC shell, the outer diameter of the core concrete column is not larger than 600 mm; the corrosion-resistant lining mainly plays a role of supporting an inner membrane, and the thickness is preferably within the range of 2mm-3 mm. In addition, because the thickness of the corrosion-resistant lining and the size of the cross-sectional dimension of the composite column have obvious magnitude difference, the influence of the lining is generally ignored in the analysis of the axial pressure bearing capacity of the composite column, and meanwhile, the influence is biased to safety.
When the corrosion-resistant lining is a PVC pipe, the PVC material is a vinyl polymer and is a crystalline material. In actual use, the PVC material is often added with stabilizers, lubricants, auxiliary processing agents, pigments, impact resistance agents and other additives, so that the PVC material has the advantages of non-flammability, high strength, weather resistance and excellent geometric stability. PVC has strong resistance to oxidant, reducing agent and strong acid, has better tensile and compressive properties, corrosion resistance, is not influenced by moisture and soil pH value and the like, and is suitable for being applied in a marine corrosive environment; in addition, the PVC material is easy to cut and machine and can keep relatively stable mechanical property.
When the corrosion-resistant lining is a hollow pipe made of a stainless steel plate, the surface of the stainless steel plate is clean, and the corrosion-resistant lining has high plasticity, toughness and mechanical strength and resists corrosion of acid, alkaline gas, solution and other media. It is an alloy steel which is not easy to rust. Stainless steel sheets are steel sheets resistant to corrosion by weak media such as air, steam, and water, and acid-resistant steel sheets are steel sheets resistant to corrosion by chemically aggressive media such as acids, alkalis, and salts. The stainless steel or stainless steel bars are adopted to replace common steel bars in the marine corrosive environment, so that the deterioration phenomenon of a concrete structure or a component due to corrosion can be effectively prevented.
Above-mentioned fretwork grout hole can be through the mode of nick fretwork, if utilize pin and turn round etc. and leave the fretwork grout hole of establishing evenly distributed on corrosion-resistant inside lining, and the thin aggregate concrete of being convenient for during the construction is in the same place with the abundant bonding of corrosion-resistant inside lining, strengthens its adhesion properties.
In the TRC prefabricated shell, the binding force T is formed between the corrosion-resistant lining and the fine aggregate concrete, and the calculation formula is as follows:
T＝T1+T2
T2＝ftA′
in the above formula, T1Is the cementing force between the contact surfaces of the corrosion-resistant lining and the fine aggregate concrete. T is2The bolt force of the fine aggregate concrete in the hollow grouting hole in the corrosion-resistant lining is obtained.
Is the average bonding stress between the corrosion-resistant lining and the fine aggregate concrete. And S is the perimeter of the cross section of the contact surface of the corrosion-resistant lining and the fine aggregate concrete. l is a mixture of corrosion-resistant lining and fine aggregateAxial length of the contact surface of the two concretes. f. oftThe split tensile strength of the medium mortar. A' is the filling cross-sectional area of the fine aggregate concrete in all the hollowed-out grouting holes.
Aggregate in the core concrete column is seaside broken stone and sea sand, and the water body mixed with the core concrete column is seawater.
The seawater, the sea sand and the seaside crushed stones can be made of local materials, and the transportation cost is greatly reduced. Wherein the sea sand can also be coral sand, and the sea side broken stone can also be coral stone. China has a long and narrow coastline, and the total sand body area resource amount is huge; the sea sand is adopted to replace river sand in an offshore or island reef structure, so that local materials can be used, the transportation cost is reduced, the price is low, and the damage to the river environment can be reduced; the seawater can be regarded as water resource which is inexhaustible and has unlimited available quantity; seaside or middle-sea macadam is also very easy to obtain. Therefore, adopt corrosion-resistant reinforcing material's prefabricated shell of TRC cooperation core concrete material to form the utility model discloses a restraint concrete column towards marine environment is china's ocean development and extensive island reef construction's second choice.
The core concrete column is embedded with corrosion-resistant reinforcing ribs, preferably stainless steel bars or FRP ribs. In this embodiment, the corrosion-resistant reinforcement bar is preferably a reinforcement cage, and includes a corrosion-resistant stirrup and a corrosion-resistant longitudinal bar.
As shown in FIGS. 9 and 10, the core concrete of the present invention was subjected to stress analysis, and the total axial pressure that the column of constraining concrete can withstand was assumed to be FTThen F isTThe calculation formula of (a) is as follows:
FT＝Fc+Fe
Fc＝fcAc+fyAs
Fe＝σrAcor
in the above formula, FcMix for coreThe axial pressure bearing capacity provided by the concrete column; feAdditional axial pressure bearing capacity is provided for the TRC prefabricated shell to restrain the core concrete column; f. ofcThe axial compressive strength of the core concrete; a. thecIs the effective cross-sectional area of the core concrete column; f. ofyThe yield strength of the corrosion-resistant reinforcing bar is enhanced; a. thesThe total cross-sectional area of the corrosion-resistant reinforcing rib; sigmarRestraining radial compressive stress on the core concrete column for the TRC prefabricated shell; a. thecorIs the cross-sectional area of the core concrete column; dcorThe diameter or side length of the corrosion-resistant lining; s is the distance between stirrups in the corrosion-resistant reinforcing bar; f. ofyvThe yield strength of the stirrup in the reinforcement is enhanced for corrosion resistance; a. thesvThe cross-sectional area of a single stirrup in the corrosion-resistant reinforcing rib; lsThe length of the mesh side of the fiber woven mesh is; n is the number of layers of fiber woven meshes in the TRC prefabricated shell; a. thefThe cross-sectional area of a single fiber in the fiber woven mesh; f. offIs the ultimate tensile strength of the fibers in the woven web of fibers.
In this embodiment, the bearing capacity provided is neglected here because the corrosion resistant lining is thin.
When the combined column is under the action of axial load or pressure, the prefabricated TRC shell can form an annular restraining effect on the core concrete column; therefore, the core concrete axial compressive strength f of the combined column is greatly improved and can be calculated according to the following formula:
f＝fc+σr
in the above formula, fcCompressive strength under axial pressure, sigma, of core concreterAnd restraining the radial compressive stress on the core concrete column for the TRC prefabricated shell.
The preparation method of the confined concrete column based on the sea sand seawater TRC prefabricated shell comprises the following steps.
Step 1, preparing the corrosion-resistant lining.
A) According to the shape requirement of the concrete column, PVC or stainless steel pipes are adopted to manufacture the corrosion-resistant lining with a set size specification. FIG. 3 shows a schematic view of a corrosion resistant liner using PVC round tubing; fig. 4 shows a schematic view of a square hollow tube made of stainless steel plate as a corrosion-resistant inner liner, which is rounded at four corners of the square hollow tube.
B) The surface of the corrosion-resistant lining is preferably hollowed out by a drilling machine or the like to form a plurality of evenly distributed hollowed-out grouting holes as shown in fig. 5 and 6. The method is characterized in that the hollow-out rate of the corrosion-resistant lining is selected according to the actual requirement by selecting the strongest bonding performance parameter, and the optimum hollow-out rate is generally between 40% and 60% through simple experiments.
And 2, fixing the corrosion-resistant lining.
As shown in fig. 7 and 8, a layer of corrosion-resistant plastic inner membrane plate is arranged on the inner side surface of the corrosion-resistant lining, and the inner cavity of the corrosion-resistant plastic inner membrane plate is fixed by adopting a cross support.
The specific method comprises the following steps: the hollow corrosion-resistant lining is stably erected on a construction operation ground or a component production workshop through the cross support, the corrosion-resistant plastic inner membrane plate is attached between the corrosion-resistant lining and the cross support, the mortar-shaped fine aggregate concrete is fully bonded with the corrosion-resistant lining, and the fine aggregate concrete mortar is prevented from flowing into the barrel through the hollow grouting holes.
And 3, preparing the TRC composite material, which comprises the following steps.
And 32, coating the first inner layer fine aggregate concrete.
And (3) after the step 2 is finished, coating a layer of the mortar-like fine aggregate concrete prepared in the step 31 on the outer side surface of the corrosion-resistant lining to form a first inner layer of fine aggregate concrete, and filling each hollowed-out grouting hole of the corrosion-resistant lining with the mortar-like fine aggregate concrete.
And 34, repeating the step 33, and laying the fiber woven net from the second layer to the last layer until the set thickness requirement is met.
Step 35, maintenance: curing in standard curing environment, such as humid air with temperature of 20 ℃ + -2 and relative humidity above 95%, for 28 days.
The utility model provides a prefabricated TRC shell compares with solitary TRC combined material shell, has better rigidity, toughness and hoop bearing capacity, and this performance advantage can guarantee that when it acts as sea sand sea water core concrete pouring template, can not cause TRC prefabricated shell base member to take place cracked and damaged because of construction processes such as core concrete pouring, vibration and compaction.
Step 5, pouring the core concrete column, which comprises the following steps:
step 51, preparing core concrete: mixing cement, seawater, sea sand and seaside crushed stone according to a set proportion to form the core concrete. Core concrete preparation may be performed simultaneously with curing in step 35.
Wherein the preferable set proportion of cement, seawater, sea sand and seaside broken stone is 1: 0.5: 1.5: 3.0, so that an intensity level of C40 can be reached. The cement is preferably corrosion resistant portland cement.
Step 52, mounting the prefabricated TRC shell: and (4) installing and fixing the TRC prefabricated shell formed in the step (4) on the construction site of the infrastructure to be reinforced.
Step 53, pouring a core concrete column: and taking the prefabricated TRC shell installed in the step 52 as a template, pouring the core concrete prepared in the step 51 into an inner cavity of the prefabricated TRC shell, vibrating while pouring, and after pouring is finished, leveling the surface.
If the core concrete column with higher strength and bearing capacity is sought, before the core concrete is poured, the corrosion-resistant longitudinal ribs 32 and the corrosion-resistant stirrups 33 with fixed longitudinal intervals are bound in the cavity of the TRC prefabricated shell to form a stainless steel reinforcement cage, and then the core concrete is slowly poured.
And step 54, curing for 28 days in a standard curing environment to form a confined concrete column comprising the core concrete column and the TRC prefabricated shell.
The above detailed description describes the preferred embodiments of the present invention, but the present invention is not limited to the details of the above embodiments, and the technical idea of the present invention can be within the scope of the present invention to perform various equivalent transformations, which all belong to the protection scope of the present invention.
Claims (6)
1. The utility model provides a confined concrete post based on prefabricated shell of sea sand sea water TRC which characterized in that: the TRC prefabricated shell comprises a TRC prefabricated shell and a core concrete column poured in the TRC prefabricated shell;
the TRC prefabricated shell comprises a corrosion-resistant lining and a TRC composite material adhered to the periphery of the corrosion-resistant lining;
the TRC composite material comprises fine aggregate concrete and at least one layer of fiber woven mesh pre-embedded in the fine aggregate concrete;
a plurality of hollow grouting holes are formed in the surface of the corrosion-resistant lining, and fine aggregate concrete is filled in each hollow grouting hole.
2. The sea sand seawater TRC precast shell based confined concrete column of claim 1, characterized in that: the core concrete column is pre-embedded with corrosion-resistant reinforcing ribs.
3. The sea sand seawater TRC precast shell based confined concrete column of claim 2, characterized in that: the corrosion-resistant reinforcing rib is a stainless steel bar or an FRP rib.
4. The sea sand seawater TRC precast shell based confined concrete column of claim 1, characterized in that: the fiber woven mesh is a carbon fiber woven mesh or a basalt fiber woven mesh.
5. The column of confined concrete based on sea sand seawater TRC precast shell according to claim 1 or 4, characterized in that: the surface of the fiber woven net is provided with a gum dipping layer or a reinforcing steel wire net lining.
6. The sea sand seawater TRC precast shell based confined concrete column of claim 1, characterized in that: the hollow rate on the corrosion-resistant lining is 40-60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020904527.8U CN213268585U (en) | 2020-05-26 | 2020-05-26 | Confined concrete column based on sea sand seawater TRC prefabricated shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020904527.8U CN213268585U (en) | 2020-05-26 | 2020-05-26 | Confined concrete column based on sea sand seawater TRC prefabricated shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213268585U true CN213268585U (en) | 2021-05-25 |
Family
ID=75936526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020904527.8U Expired - Fee Related CN213268585U (en) | 2020-05-26 | 2020-05-26 | Confined concrete column based on sea sand seawater TRC prefabricated shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213268585U (en) |
-
2020
- 2020-05-26 CN CN202020904527.8U patent/CN213268585U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111851400B (en) | Confined concrete column based on sea sand seawater TRC prefabricated shell and preparation method | |
| CN102383418B (en) | Anti-seismic prefabricated concrete solid square pile and production method thereof | |
| CN101343871B (en) | Composite pile with high permanent stability protection layer and its production and construction method | |
| CN101343870A (en) | Fiber-reinforced composite material rib concrete pile and its production and construction method | |
| CN107503470A (en) | A kind of pre-stress FRP sleeve FRP tendons sea sand seawater expansive concrete coupled column | |
| CN101962951A (en) | Construction method of composite pile of fiber reinforced composite deep-water bridge and composite pile thereof | |
| CN106223544A (en) | A kind of ultra-high performance concrete post permanent template and preparation method thereof | |
| CN107447646B (en) | Preparation method of steel-continuous fiber composite bar ECC-concrete composite column/pier | |
| CN104652243B (en) | FRP tube concrete and FRP corrugated plate combined buried arch bridge and construction method thereof | |
| CN208718220U (en) | A kind of profile steel concrete column using GFRP tendons | |
| CN212561486U (en) | FRP composite pile prepared by FRP composite material | |
| CN213268585U (en) | Confined concrete column based on sea sand seawater TRC prefabricated shell | |
| CN112982396A (en) | Tensile fiber anchor rod body and anchor rod | |
| CN106049759A (en) | Cylindrical ultra-high performance concrete permanent formwork and preparation method thereof | |
| CN105064411A (en) | Method for building post-pouring expansion reinforcing band of wallboard of underground structure | |
| CN109555267A (en) | A kind of complex coagulation earth pillar and preparation method thereof | |
| CN112757437B (en) | Solid waste large-mixing-amount concrete prefabricated laminated slab and preparation method thereof | |
| CN115012406A (en) | Construction method for underwater glass fiber sleeve reinforced pile foundation | |
| CN107938845A (en) | A kind of concrete prefabricated assembling combining structures of FRP | |
| CN210507502U (en) | Prefabricated assembled concrete slab bed structure | |
| CN207905112U (en) | A kind of concrete prefabricated assembly composite structures of FRP- | |
| WO2007137152A2 (en) | Composite structure | |
| CN204571286U (en) | Cast-in-place bracket column concrete construction formwork | |
| CN110056129A (en) | FRP pipe profile sea sand fast hardening concrete square combination column | |
| CN205088677U (en) | Low hollow side of prestressed concrete stake of high performance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20210525 |