Foundation structure

Abstract

The utility model provides a foundation structure. The foundation structure comprises a protective shell with a containing cavity; one end of the stand column is installed in the containing cavity, and the other end of the stand column penetrates out of the protective shell; the concrete structure is located in the containing cavity; the reinforcement cage is installed in the concrete structure, and the outer surface of the reinforcement cage is sequentially coated with a first bonding layer and a first anti-corrosion layer from inside to outside. According to the technical scheme, the foundation structure can solve the problem that an existing foundation structure is poor in service durability.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, in particular to a foundation structure. Background Art

[0002] Concrete is the largest artificial material and the most important building and structural engineering material in the world today. According to statistics, my country's total cement production has reached 2.377 billion tons in 2020, and the total production of commercial concrete has reached 2.899 billion cubic meters, ranking first in the world, and is still on an upward trend. Concrete materials play a vital role in improving people's livelihood, improving living standards and promoting social development. With the development of society and the advancement of science and technology, various construction projects are constantly developing towards higher, larger and deeper spaces and scales, and the requirements for the quality of concrete materials and the service life of materials are getting higher and higher.

[0003] Concrete structures have been in service for a long time in the Qarhan area. Under the multiple effects of low pressure, low humidity and salt corrosion, it is easy to cause expansion and cracking on the concrete surface, exposing the steel bars, and ultimately reducing the service durability of the concrete buildings, causing huge economic losses. Utility Model Content

[0004] The main purpose of the utility model is to provide a foundation structure, which can solve the problem of poor service durability of the existing foundation structure.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a foundation structure, including: a protective shell having a accommodating cavity; a column, one end of which is installed in the accommodating cavity, and the other end of the column passes through the protective shell; a concrete structure is located in the accommodating cavity; a steel cage is installed in the concrete structure, and the outer surface of the steel cage is coated with a first bonding layer and a first anti-corrosion layer from the inside to the outside.

[0006] Furthermore, the first bonding layer is an epoxy paint layer, the first anti-corrosion layer is an epoxy resin paint layer, and the thickness of the epoxy paint layer is less than the thickness of the epoxy resin paint layer.

[0007] Furthermore, the thickness of the first bonding layer ranges from 20 μm to 30 μm, and the thickness of the first anti-corrosion layer ranges from 45 μm to 55 μm.

[0008] Furthermore, a plurality of barbs are arranged on the outer wall surface of the steel cage.

[0009] Furthermore, at least some of the barbs have different inclination angles; and / or the barbs are in the form of a sheet, a column or a strip.

[0010] Furthermore, the steel cage includes a plurality of first steel bars and a plurality of second steel bars, the plurality of first steel bars and the plurality of second steel bars are cross-arranged, and at least some of the first steel bars and / or at least some of the second steel bars are provided with barbs.

[0011] Furthermore, the foundation structure also includes a protective plate, which is arranged in the accommodating cavity and located between the inner wall of the protective shell and the concrete structure.

[0012] Furthermore, a waterproof layer is provided on at least one side of the protective plate.

[0013] Furthermore, the inner wall surface of the protective shell is coated with a second bonding layer and a second anti-corrosion layer in sequence from the inside to the outside; and / or, the outer wall surface of the protective shell is coated with a third bonding layer and a third anti-corrosion layer in sequence from the inside to the outside.

[0014] Furthermore, the protective shell has an upper cover, and a through hole is provided on the upper cover for the pillar to pass through; and / or, there are multiple pillars, and the multiple pillars are arranged in the accommodating cavity at intervals.

[0015] By applying the technical solution of the utility model, a concrete structure is filled in the accommodating cavity, a steel cage is located in the concrete structure, and the outer surface of the steel cage is coated with a first bonding layer. On the one hand, the first bonding layer can fill the depressions on the outer surface of the steel cage to make the outer surface of the steel cage more uniform and smooth. On the other hand, the first bonding layer can enhance the adhesion between the first anti-corrosion layer and the outer surface of the steel cage. The provision of the first anti-corrosion layer can prevent moisture, chloride ions and other substances in the concrete structure from invading the surface of the steel cage and causing the steel bars to rust. This can not only enhance the overall bearing capacity and structural stability of the foundation structure, but also improve the service durability of the foundation structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the specification of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0017] In the figure:

[0018] Figure 1 A structural schematic diagram of a foundation structure of an embodiment of the utility model is shown.

[0019] The above drawings include the following reference numerals:

[0020] 10. Protective shell; 11. Upper cover; 20. Column; 30. Concrete structure; 40. Steel cage; 41. First steel bar; 42. Second steel bar; 43. Barb; 50. Protective plate; 60. Waterproof layer. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] The composition of concrete materials is easily affected by the external climate environment. The climate environment in the Chaerhan area is harsh, with an average altitude of 2,670m. The climate is characterized by high altitude, low humidity and large temperature difference between day and night. The Chaerhan Salt Lake is a dry salt lake with rich intercrystalline brine. The salt lake contains a large amount of soluble salt, with a maximum salt content of more than 400g / L. The salt layer crystals are filled with highly mineralized brine. The concentration of MgCl2 and Clˉ ions in the brine is as high as 202g / L, and the concentration of Mg2+ ions is as high as 29g / L. It is easy to react with Ca(OH)2 produced during the bloom of cement concrete. The Mg(OH)2 generated by the reaction is a soft substance without cementing ability, and is also rich in magnesium chloride. In addition, it also contains more than 20 elements such as sulfur, iodine, boron, phosphorus, lithium, etc. It is a key development area. Therefore, this specific environment in the Chaerhan area is very harsh on building materials, especially cement concrete, and durability and corrosion resistance are particularly prominent.

[0023] The corrosion of concrete and reinforced concrete in this corrosive medium is very serious. From the initial occurrence of pockmarks and sand on the surface of the building or component, and then peeling, it is quickly destroyed, greatly reducing the service life of cement concrete projects. Salt crystallization damage is different from chemical corrosion of salts. Its crystallization damage is that after the salt solution in the brine is absorbed to the equilibrium height in the capillary, the water evaporates and the solution is concentrated, and the salt substances crystallize. Due to the crystallization pressure, the capillary wall cracks and damages, causing the mortar protective layer to powder and peel off, and the hardened cement paste to peel off in a small crack-like manner, and gradually causing the concrete to peel off and crack. The survey found that if the concrete structure is in service for a long time under the conditions of low pressure, low humidity and salt corrosion like the Chaerhan area, it is easy to cause the concrete surface to expand and crack, and the steel bars to be exposed, which will eventually reduce the service durability of the concrete building. The main reason is that the water evaporation rate on the surface of the concrete component increases in this composite environment, resulting in a decrease in the degree of cement hydration and deterioration of the pore structure, which ultimately leads to a decrease in the corrosion resistance and durability of the concrete structure and a shortened service life.

[0024] The concrete surface above the soil in contact with the air has serious slurry shedding and the steel aggregate is exposed to the air, and the cement slurry on the surface also has serious peeling. We selected a representative corrosion condition for the working conditions of the salt lake in the Chaerhan area for analysis. In the production of potash fertilizer in the Chaerhan area, among the four potash fertilizer processes used, the hot melt crystallization process for producing potassium chloride is also the most corrosive process for producing potash fertilizer. It is a representative harsh environment, and therefore it is also a representative process for corrosion protection. For the production of potassium chloride under normal temperature conditions, salt spray environment, full contact and semi-contact conditions with brine, high temperature environment, and slightly acidic environment, the application of corrosion-resistant stainless steel is increased in materials, and organic coatings, as well as hot-dip galvanizing, hot-spraying zinc and hot-spraying aluminum and other anti-corrosion technologies are mostly used for protection. However, these protection technologies have serious corrosion to varying degrees, and it is difficult to meet the harsh salt lake production conditions. The production corrosion problem of the hot melt device is more serious, and its corrosion forms are mainly water vapor corrosion and mineral material corrosion. In addition, there is also water corrosion in a humid environment. The corrosion of concrete foundation is mainly caused by mineral corrosion. The equipment failure rate increases due to corrosion, and some tank surfaces and pipelines often leak, which aggravates the corrosion conditions of concrete foundations such as factories.

[0025] In the environment of the Chaerhan region, concrete components are damaged earlier and more severely than those in low-altitude areas. This is mainly because the early low-pressure and low-humidity curing deteriorated the pore structure of the specimens, resulting in an increase in the number of connected capillaries. In the later period, the salt solution enters the specimen under capillary action, migrates to the components exposed to the air through adsorption and diffusion, and then evaporates into the environment under low humidity and low air pressure, causing the internal salt solution to be saturated prematurely, resulting in physical crystallization and chemical erosion damage. Finally, it is proposed that the durability of concrete components in plateau environments should be improved by reducing the porosity of components, improving microstructures, improving structural uniformity, and reducing corrosion sources. The problem of concrete durability is very complex and is closely related to the performance of the concrete material itself. The impact of the service environment is more far-reaching. The destructive factors that affect the durability of concrete are steel bar corrosion, freeze-thaw damage, and corrosion. Steel problems mainly refer to steel bar corrosion, and concrete problems can be divided into environmental effects and damage under alkali-aggregate reaction. Environmental effects can be divided into freeze-thaw, chemical corrosion, biological and mechanical physical effects, etc. Steel bar corrosion is the most common and largest durability problem of concrete structures, while chemical corrosion is the most complicated. The Qarhan Salt Lake contains a large number of corrosive ions, such as chloride ions, sulfate ions, and magnesium ions. It is generally believed that steel bar corrosion caused by chloride ions is the most common cause of reinforced concrete corrosion, while sulfate ions and magnesium ions are the main causes of chemical corrosion of concrete.

[0026] Steel corrosion caused by chloride salts is one of the most common causes of degradation of reinforced concrete structures. Steel corrosion in concrete will cause two kinds of harm: first, corrosion will reduce the effective cross-section of steel bars and weaken the bearing capacity of steel bars; second, corrosion will cause steel bar volume expansion, resulting in cracking of concrete protective layer, reducing the bonding ability between steel bars and concrete, losing the function of protecting steel bars, and finally leading to structural damage. Steel corrosion in concrete is an electrochemical process, which will occur even if there are no chloride ions in the service environment. This is a common and inevitable phenomenon. However, the corrosion reaction on the surface of steel bars is a long process, and chloride ions can accelerate the transfer of electrons, which can significantly accelerate the corrosion of steel bars. According to the service life model of concrete damage caused by steel corrosion caused by chloride ion corrosion, the service life of concrete structures can be divided into two stages: induction period and extension period. The induction period refers to the chloride ions reaching the vicinity of steel bars through the concrete pores, which is mainly related to the thickness of the concrete protective layer and the chloride ion concentration. The extension period refers to the destruction of the passivation layer on the surface of the steel bars, and the steel bars begin to corrode. The time of steel bar corrosion mainly depends on the induction period. In engineering practice, the prediction of reinforced concrete life usually refers to the time when chloride ions reach the critical concentration on the steel bar surface, that is, the time of the induction period is mainly considered. From the service life model diagram, it can be seen that the corrosion of steel bars in concrete is not an instantaneous process, and the chloride ion concentration needs to reach a critical value. Therefore, the critical chloride ion amount can be considered as the amount of chloride ions required to maintain the local depassivation of the steel bar and thus cause corrosion. If this value is exceeded, it can be considered that the steel bar begins to corrode.

[0027] At present, it is generally believed that only free chloride ions that can move freely can accelerate the corrosion of steel bars. However, the hydration products of cement will bind or adsorb some chloride ions to become bound chloride ions. Although these chloride ions cannot move in cement-based materials, they will become free chloride ions under the influence of other factors. Therefore, the chemical equilibrium between free chloride ions and bound chloride ions will also affect the critical chloride ion concentration. In addition, the pH, temperature and carbonation of the pore solution will change the stability of bound chloride ions and ultimately affect the critical chloride ion concentration. There are many factors that affect the critical chloride ion concentration. The following are some important and common factors: (1) temperature; (2) the interface between steel bars and cement-based materials and the properties of steel bars; (3) the type of cementitious material (chloride ion binding capacity); (4) the humidity inside the concrete; (5) the source of chloride ions (internal admixture and external infiltration); (6) other ions (mainly sulfate). The physical and chemical reactions that chloride ions undergo in the process of being transmitted to the surface of steel bars have a huge impact on the ion transmission process. The ion transmission process is an important factor in determining the service life.

[0028] Chloride ions will inevitably be introduced into concrete materials during the preparation and service stages. The ways of introducing chloride ions can be called internal admixture and external infiltration. Internal admixture of chloride ions refers to the chloride ions brought in by the raw materials of cement, such as sand, mixing water, admixtures, etc., and external infiltration refers to the chloride ions in the service environment that penetrate into the cement-based materials. The amount of internal admixture of chloride ions can be kept within an acceptable range through strict control, but external infiltration of chloride ions will inevitably continue to enter the cement-based materials, so external infiltration of chloride ions is the main cause of steel corrosion. There are many ways for external chloride ions to enter the concrete, including: adsorption, diffusion, combination, penetration, capillary adsorption, etc. However, under saturation conditions, the diffusion process with ion concentration as the main driving force is the most important migration method for chloride ions to enter the concrete material.

[0029] like Figure 1 As shown, the utility model provides a foundation structure, which includes: a protective shell 10, having a accommodating cavity; a column 20, one end of the column 20 is installed in the accommodating cavity, and the other end of the column 20 passes through the protective shell 10; a concrete structure 30, located in the accommodating cavity; a steel cage 40, installed in the concrete structure 30, and the outer surface of the steel cage 40 is coated with a first bonding layer and a first anti-corrosion layer from the inside to the outside.

[0030] In this embodiment, the protective shell 10 is used for pouring and forming the concrete structure 30. It provides a specific shape and fixed support for the concrete structure 30 and helps the concrete solidify and form. The concrete structure 30 is filled in the accommodating cavity, one end of the column 20 is inserted into the concrete structure 30, and the other end of the column 20 is inserted from the top of the protective shell 10. The steel cage 40 is first placed in the accommodating cavity, and then concrete is poured into the accommodating cavity to form the concrete structure 30. At this time, the steel cage 40 is located in the concrete structure 30. The outer surface of the steel cage 40 is coated with a first bonding layer. On the one hand, the first bonding layer can fill the depression on the outer surface of the steel cage 40, so that the outer surface of the steel cage 40 is more uniform and smooth. On the other hand, the first bonding layer can strengthen the adhesion between the first anti-corrosion layer and the outer surface of the steel cage 40. The setting of the first anti-corrosion layer can prevent moisture and chloride ions in the concrete structure 30 from invading the surface of the steel cage 40 to cause the steel cage 40 to rust, which can not only enhance the overall bearing capacity and structural stability of the foundation structure, but also improve the service durability of the foundation structure.

[0031] In one embodiment, in view of the serious chloride ion corrosion and low durability of concrete in salt lake areas, the concrete structure 30 uses high-grade gypsum slag cement, which has the characteristics of micro-expansion, strong bonding and resistance to sulfate medium corrosion. At the same time, it reduces the water-cement ratio, improves the compactness and strength, and prevents the loss of calcium hydroxide to reduce dissolution corrosion and solid phase product volume expansion corrosion. Among them, cement: needs to meet the requirements of national standard GB / T175-2007; sand: the particle diameter must be between 1.18mm and 5mm, and it must be processed by screening, washing and other processes; gravel: meets GB / T14685-2011 standard, with a particle size between 5mm and 40mm, and uniform mass distribution; water: clean, free of corrosive substances, neutral pH, and unfrozen. In addition, the raw materials of concrete must also comply with the regulations of local industry regulatory departments, including cement varieties, strength grades, factory certificates, etc. The concrete structure 30 as a structural support material of the building has a high-strength load-bearing capacity, can withstand huge pressure, has good earthquake resistance and good thermal insulation performance, and can ensure the stability and safety of the building.

[0032] In one embodiment, the steel cage 40 is made of threaded steel with a diameter of 10 mm.

[0033] In one embodiment, the first bonding layer is an epoxy iron red primer.

[0034] In one embodiment of the utility model, the first bonding layer is an epoxy paint layer, the first anti-corrosion layer is an epoxy resin paint layer, and the thickness of the epoxy paint layer is less than the thickness of the epoxy resin paint layer.

[0035] The above arrangement can improve the adhesion between the first anti-corrosion layer and the outer surface of the steel cage 40, and also play a good anti-corrosion role. The thickness of the epoxy paint layer is less than that of the epoxy resin paint layer, which can avoid the first anti-corrosion layer from falling off due to cracking of the epoxy paint layer being too thick.

[0036] In an embodiment of the utility model, the thickness of the first bonding layer ranges from 20 μm to 30 μm, and the thickness of the first anti-corrosion layer ranges from 45 μm to 55 μm.

[0037] Through the above arrangement, it is possible to avoid the first bonding layer and the first anti-corrosion layer being too thick while ensuring the anti-corrosion effect of the first anti-corrosion layer and the adhesion between the first anti-corrosion layer and the outer surface of the steel cage 40, thereby saving costs.

[0038] In one embodiment, the first bonding layer is epoxy iron red primer, and the first anti-corrosion layer is epoxy resin paint. Before coating, rust removal is performed using an electric tool, and the rust removal grade is ST2. The thickness of the epoxy iron red primer is 25 μm, and the thickness of the epoxy resin paint is 50 μm.

[0039] like Figure 1 As shown, in one embodiment of the present invention, a plurality of barbs 43 are provided on the outer wall surface of the steel cage 40 .

[0040] In this embodiment, the concrete structure 30 is formed by pouring concrete into the accommodating cavity, and a plurality of barbs 43 are arranged on the outer surface of the steel cage 40, which can strengthen the bonding ability between the steel cage 40 and the concrete structure 30, so that the concrete is not easy to fall off from the outer surface of the steel cage 40.

[0041] like Figure 1 As shown, in one embodiment of the present invention, at least some of the barbs 43 have different inclination angles.

[0042] In this embodiment, a plurality of barbs 43 are arranged on the outer surface of the steel cage 40 along the circumference of the steel cage 40, and some of the barbs 43 are arranged at different positions and at different inclination angles. This can prevent concrete at different positions from falling off the outer surface of the steel cage 40, thereby further improving the bonding ability between the steel cage 40 and the concrete structure 30.

[0043] In one embodiment of the present invention, the barbs 43 are in the form of a sheet, a column or a strip.

[0044] like Figure 1 As shown, in one embodiment of the utility model, the steel cage 40 includes a plurality of first steel bars 41 and a plurality of second steel bars 42, the plurality of first steel bars 41 and the plurality of second steel bars 42 are cross-arranged, and at least some of the first steel bars 41 and / or at least some of the second steel bars 42 are provided with barbs 43.

[0045] In this embodiment, a plurality of first steel bars 41 and a plurality of second steel bars 42 are cross-arranged to form a steel cage 40, and at least a portion of the first steel bars 41 and / or at least a portion of the second steel bars 42 are provided with barbs 43, which can prevent concrete at different positions from falling off the outer surface of the steel cage 40, thereby improving the bonding ability between the steel cage 40 and the concrete structure 30.

[0046] like Figure 1 As shown, in one embodiment of the utility model, the foundation structure further includes a protective plate 50 , which is disposed in the accommodating cavity, and the protective plate 50 is located between the inner wall of the protective shell 10 and the concrete structure 30 .

[0047] In this embodiment, the provision of the protective plate 50 can further enhance the structural strength of the foundation structure.

[0048] like Figure 1 As shown, in one embodiment of the present invention, a waterproof layer 60 is provided on at least one side of the protective plate 50 .

[0049] Through the above arrangement, the soil and water containing chloride ions in the environment can be prevented from corroding the steel cage 40 .

[0050] In one embodiment, the waterproof layer 60 is made of SBS waterproof membrane.

[0051] In one embodiment of the present invention, the inner wall surface of the protective shell 10 is coated with a second bonding layer and a second anti-corrosion layer in sequence from the inside to the outside.

[0052] Through the above arrangement, the adhesion between the second anti-corrosion layer and the inner wall surface of the protective shell 10 can be improved, and the anti-corrosion performance of the foundation structure can also be enhanced.

[0053] In one embodiment, the thickness of the second bonding layer is less than the thickness of the second anti-corrosion layer. Through the above arrangement, the adhesion between the second anti-corrosion layer and the inner wall of the protective shell 10 can be improved, and a good anti-corrosion effect can also be achieved. The thickness of the second bonding layer is less than the thickness of the second anti-corrosion layer, which can avoid the second anti-corrosion layer from falling off due to cracking caused by the second bonding layer being too thick.

[0054] In one embodiment, the second bonding layer is epoxy iron red primer, and the second anti-corrosion layer is epoxy resin paint. Before coating, rust removal is performed using an electric tool, and the rust removal grade is ST2. The thickness of the epoxy iron red primer is 25 μm, and the thickness of the epoxy resin paint is 50 μm.

[0055] In one embodiment of the present invention, the outer wall surface of the protective shell 10 is coated with a third bonding layer and a third anti-corrosion layer in sequence from the inside to the outside.

[0056] Through the above arrangement, the adhesion between the second anti-corrosion layer and the outer wall surface of the protective shell 10 can be improved, and the anti-corrosion performance of the foundation structure can also be enhanced.

[0057] In one embodiment, the thickness of the third bonding layer is less than the thickness of the third anti-corrosion layer. Through the above arrangement, the adhesion between the third anti-corrosion layer and the outer wall of the protective shell 10 can be improved, and a good anti-corrosion effect can also be achieved. The thickness of the third bonding layer is less than the thickness of the third anti-corrosion layer, which can avoid the third anti-corrosion layer from falling off due to cracking caused by the third bonding layer being too thick.

[0058] In one embodiment, the third bonding layer is epoxy iron red primer, and the third anti-corrosion layer is epoxy resin paint. Before coating, rust removal is performed using an electric tool, and the rust removal grade is ST2. The thickness of the epoxy iron red primer is 25 μm, and the thickness of the epoxy resin paint is 50 μm.

[0059] In one embodiment of the present invention, the protective housing 10 has an upper cover 11 , and the upper cover 11 is provided with a through hole for the column 20 to pass through.

[0060] In this embodiment, before pouring the concrete structure 30, the upper cover 11 is opened, and after pouring the concrete structure 30, the upper cover 11 is closed, so as to protect the concrete structure 30 and the steel cage 40 in the accommodating cavity from erosion by rainwater.

[0061] In an embodiment of the present invention, there are multiple pillars 20, and the multiple pillars 20 are arranged in the accommodating cavity at intervals.

[0062] In this embodiment, the plurality of columns 20 can transfer the weight of the building constructed on the foundation structure to the depth of the foundation structure, thereby ensuring the stability of the building.

[0063] In one embodiment, the process of forming the foundation structure of the present application on the original corroded foundation is as follows: clean the corroded concrete, thoroughly clean the corroded concrete above the foundation ground of the column 20, and prevent the chloride ions in the original concrete from corroding the newly poured concrete structure 30; make a steel cage 40 (steel corrosion is the most common corrosion problem of the concrete structure 30. The main reason is that the moisture and chloride ions in the concrete will invade the surface of the steel bars, causing the steel bars to begin to rust. The corrosion of the steel bars will cause their volume to increase, thereby causing the concrete to crack and peel off, further damaging the integrity and stability of the concrete structure 30). Use φ10mm threaded steel bars to make a steel cage 40 with a size of 100mm×100mm×200mm, and then apply epoxy iron red primer with a thickness of 25μm and thick 30% epoxy iron red primer on the outer surface of the steel cage 40. The epoxy resin paint is 50μm thick, and the rust is removed by an electric rust removal tool before coating, and the rust removal grade is ST2, and then the steel cage 40 is placed in the accommodating cavity; Q235B6mm steel plate is used to make a protective shell 10 with a size of 650mm×650mm×250mm, and the inner wall surface of the protective shell 10 is coated with an epoxy iron red primer with a thickness of 25μm and an epoxy resin paint with a thickness of 50μm in sequence. The rust is removed by an electric rust removal tool before coating, and the rust removal grade is ST2, which plays a role of secondary anti-seepage and anti-corrosion; the protective plate 50 is installed in the installation cavity, and a waterproof layer 60 is arranged on the side of the protective plate 50 facing the inner wall of the protective shell 10, which improves the strength while reducing the permeability and blocks the contact between the concrete structure 30 and the corrosive medium, so as to achieve the effect of anti-corrosion reinforcement; concrete is poured into the accommodating cavity to form a concrete structure 30.

[0064] From the above description, it can be seen that the above-mentioned embodiments of the utility model achieve the following technical effects: the concrete structure is filled in the accommodating cavity, the steel cage is located in the concrete structure, and the outer surface of the steel cage is coated with a first bonding layer. On the one hand, the first bonding layer can fill the depressions on the outer surface of the steel cage, making the outer surface of the steel cage more uniform and smooth. On the other hand, the first bonding layer can enhance the adhesion between the first anti-corrosion layer and the outer surface of the steel cage. The setting of the first anti-corrosion layer can prevent moisture and chloride ions in the concrete structure from invading the surface of the steel cage and causing the steel cage to rust, which can not only enhance the overall bearing capacity and structural stability of the foundation structure, but also improve the service durability of the foundation structure.

[0065] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0066] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0067] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A foundation structure, characterized in that: include: A protective housing (10) having a receiving cavity; A column (20), one end of the column (20) is installed in the accommodating cavity, and the other end of the column (20) passes through the protective shell (10); A concrete structure (30) located in the accommodating cavity; A steel cage (40) is installed in the concrete structure (30), and the outer surface of the steel cage (40) is coated with a first bonding layer and a first anti-corrosion layer in sequence from the inside to the outside.

2. The foundation structure according to claim 1, characterized in that: The first bonding layer is an epoxy paint layer, the first anti-corrosion layer is an epoxy resin paint layer, and the thickness of the epoxy paint layer is less than the thickness of the epoxy resin paint layer.

3. The foundation structure according to claim 1, characterized in that: The thickness of the first bonding layer ranges from 20 μm to 30 μm, and the thickness of the first anti-corrosion layer ranges from 45 μm to 55 μm.

4. The foundation structure according to claim 1, characterized in that: A plurality of barbs (43) are arranged on the outer wall surface of the steel cage (40).

5. The foundation structure according to claim 4, characterized in that: At least some of the barbs (43) have different inclination angles; and / or the barbs (43) are in the form of a sheet, a column or a strip.

6. The foundation structure according to claim 4, characterized in that: The steel cage (40) comprises a plurality of first steel bars (41) and a plurality of second steel bars (42), wherein the plurality of first steel bars (41) and the plurality of second steel bars (42) are cross-arranged, and the barbs (43) are provided on at least some of the first steel bars (41) and / or at least some of the second steel bars (42).

7. The foundation structure according to claim 1, characterized in that: The foundation structure further comprises a protective plate (50), wherein the protective plate (50) is arranged in the accommodating cavity, and the protective plate (50) is located between the inner wall of the protective shell (10) and the concrete structure (30).

8. The foundation structure according to claim 7, characterized in that: At least one side of the protective plate (50) is provided with a waterproof layer (60).

9. The foundation structure according to claim 1, characterized in that: The inner wall surface of the protective shell (10) is coated with a second bonding layer and a second anti-corrosion layer in sequence from the inside to the outside; and / or the outer wall surface of the protective shell (10) is coated with a third bonding layer and a third anti-corrosion layer in sequence from the inside to the outside.

10. The foundation structure according to claim 1, characterized in that: The protective shell (10) has an upper cover (11), and the upper cover (11) is provided with a through hole for the column (20) to pass through; and / or, there are multiple columns (20), and the multiple columns (20) are arranged at intervals in the accommodating cavity.

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