An assembled earthen wall structure and a construction method thereof

Abstract

The application discloses an assembled earthen brick wall structure and a construction method thereof. The wall structure comprises a main frame, a wall body foundation, a wall body and a coping. The wall body comprises a main wall body and a buffer support layer. The main frame comprises vertical beams arranged in a vertical direction and ring beams arranged in a horizontal direction. The vertical beams and the ring beams are uniformly arranged on the inner and outer sides of the main wall body and gradually increase in thickness from top to bottom in the vertical direction. The structure is largely made of prefabricated parts and is constructed by using an assembled construction method. Compared with the existing structure and construction method of a tank chamber wall or a tank chamber protective wall, the bearing capacity of the assembled earthen brick wall structure can better adapt to the changes of the internal earthen tank pressure and the external earthen layer pressure, the bearing capacity and the protection capacity are improved, the construction efficiency is greatly improved, the construction period is shortened, the construction quality is ensured, and in addition, the construction by using the prefabricated parts reduces the emission of pollutants in the process of on-site treatment and construction of raw materials, and the environmental protection of the whole construction process is improved.

Description

Technical Field

[0001] This invention belongs to the field of soil-covered tank technology, and particularly relates to a prefabricated soil-covered brick wall structure and its construction method. Background Technology

[0002] Storage tanks are installed in underground bunkers, which consist of protective walls and roofs. The protective walls are constructed using precast brick, stone, or concrete, or cast-in-place concrete. This type of storage tank is often called a soil-covered tank or soil-covered storage tank. Compared to storage tanks directly exposed to the external environment, soil-covered tanks reduce evaporation losses and delay the deterioration of the petrochemical products stored inside. Because soil-covered tanks have good airtightness, and the top and sides are covered with at least 0.5 meters of soil, the temperature inside the tank is relatively stable and less affected by the ambient temperature, which helps reduce the tank's breathing and evaporation losses and delay the deterioration of the petrochemical products. Furthermore, soil-covered tanks also have a certain degree of protection against airborne attacks, making them relatively safe. The soil and vegetation covering effectively conceals the tanks, reducing the possibility of enemy detection and attack. In addition, the tank enclosure provides a certain level of protection, resisting some enemy attacks and preventing spillage in the event of a fire or explosion, thus mitigating the impact on adjacent tanks.

[0003] The existing construction procedure for covered tanks usually involves first excavating a certain space on flat ground or a hillside to build the storage tank, then constructing the tank chamber walls, pouring the protective arch, assembling the storage tank accessories, and finally covering it with soil. This construction method is usually limited by the terrain, making construction difficult and inefficient. Alternatively, the tank chamber can be built first, and then the storage tank can be built inside. For example, invention patent (CN201010223969.7) discloses a method for constructing covered tanks, which discloses the construction of the covered tank chamber first and then the installation of the storage tank.

[0004] However, in the two existing methods of constructing covered tanks, both use simple masonry structures for the tank walls or protective walls, and are built on-site. This approach requires multiple cycles of construction, quality inspection, acceptance, and continued construction, easily leading to inconsistent construction quality and low efficiency. Furthermore, the storage of various construction materials on-site creates complex management issues. On-site material handling also generates dust, wastewater, and waste residue, which is detrimental to environmental protection. Moreover, the simple masonry structure results in a uniform and unadjustable horizontal load-bearing capacity of the tank walls or protective walls. Actual monitoring shows that the pressure on both the covered tank and the external covering structure gradually increases vertically from top to bottom. Therefore, the bottom of the existing tank walls or protective walls is prone to uneven stress under pressure from both the inside and outside, leading to displacement or collapse.

[0005] This shows that the existing technology has many shortcomings and needs further improvement and enhancement. Summary of the Invention

[0006] This invention provides a prefabricated earth-covered brick wall structure and its construction method to solve at least one of the above-mentioned technical problems.

[0007] The technical solution adopted in this invention is as follows:

[0008] In a first aspect, the present invention provides a prefabricated earth-covered brick wall structure, disposed on the outside of an earth-covered tank, comprising a wall foundation, a wall, and a capping; the wall comprises a main wall and a buffer support layer, the buffer support layer being disposed on the side of the main wall facing the earth-covered tank or on both sides of the main wall; it also includes a main frame for setting the main wall, the main frame being connected to the wall foundation, including vertical beams arranged in a vertical direction and ring beams arranged in a horizontal direction, the vertical beams and the ring beams being provided in multiples and evenly distributed on the inner and outer sides of the main wall; the buffer support layer comprises a buffer layer and a support member, one end of the support member being connected to the main frame for supporting the buffer layer, and the other end of the support member contacting and engaging with the outer wall of the earth-covered tank.

[0009] In the above scheme, the main frame, wall foundation, main wall, and buffer support layer can all be constructed using prefabricated components or a combination of prefabricated components and on-site construction. Compared with the existing technology that relies entirely on on-site construction, this greatly improves construction efficiency, shortens the construction cycle, and thus helps reduce construction costs. At the same time, the use of the above-mentioned prefabricated earth-covered brick wall structure facilitates the monitoring of the quality of each prefabricated component before and during construction, which helps ensure the construction quality and thus the structural strength of the entire prefabricated earth-covered brick wall structure, so as to better support, buffer, and protect the earth-covered layer and the earth-covered tank. In addition, the prefabricated earth-covered brick wall structure in this application uses a large number of prefabricated components for construction, eliminating the emission of pollutants such as dust, waste residue, and wastewater caused by the on-site processing of construction materials, greatly improving the environmental friendliness of the entire construction process.

[0010] In a preferred embodiment of this application, the main wall includes a wall frame and brick wall units. The wall frame has multiple mounting slots, and the brick wall units are fixedly installed in the mounting slots. Each brick wall unit includes a precast skeleton and bricks laid on the precast skeleton. The precast skeleton has mutually adaptable mating parts and locking parts on its side. Two adjacent brick wall units are joined together by the mating parts and locking parts. The precast skeleton also has a first through pipe arranged in the vertical and / or horizontal direction. The first through pipes in adjacent brick wall units are interconnected. The wall frame has a first through hole corresponding to the first through pipe. Reinforcing bars can be inserted into the first through hole and the first through pipe to connect the brick wall units arranged in adjacent mounting slots.

[0011] In the above scheme, the cooperation structure between the brick wall unit and the installation grid is simple and easy to install. Furthermore, the interlocking of the cooperation part and the locking part between the brick wall units, as well as the limiting of the brick wall unit and the installation grid by the steel bars passing through the first through hole and the first through pipe, ensure that the connection structure between each brick wall unit and between the installation grid and the brick wall unit has sufficient structural strength and stability. This is beneficial to improving the load-bearing capacity of the entire prefabricated earth-covered brick wall structure for the earth cover, and avoids the earth cover pressure directly pressing on the earth cover tank, which could lead to deformation or even damage and rupture of the pipe body.

[0012] In a preferred embodiment of this application, the vertical beam and the ring beam are provided with a first connecting portion on the side facing the main wall, and the wall frame and / or the brick wall unit have a second connecting portion adapted to the first connecting portion on the side facing the main frame; it also includes fasteners that are respectively connected to the first connecting portion and the second connecting portion, and the first connecting portion and the second connecting portion are locked together by the fasteners so that the main frame is fixedly connected to the main wall. Furthermore, in a preferred embodiment of this application, the vertical beams increase in size horizontally from top to bottom, and the horizontal thickness of the lower ring beam is greater than the horizontal thickness of the upper ring beam.

[0013] With the above structure, the first connecting part, the second connecting part, and the fasteners are connected in a horizontal direction, thereby firmly connecting the main frame and the main wall together in the horizontal direction. Combined with the aforementioned reinforcement passing through the first through hole and the first through pipe, the main wall is fixed both vertically and horizontally, greatly improving construction quality while ensuring construction efficiency. Furthermore, by varying the dimensions of the vertical beams and ring beams, the horizontal load-bearing capacity of the main frame in this application can be increased vertically from top to bottom, better adapting to changes in the pressure of the internal cover tank and the external cover layer, thus enhancing its load-bearing capacity and better protecting the internal cover tank.

[0014] In a preferred embodiment of this application, the wall frame, the vertical beam, and the ring beam are all made of reinforced concrete. The first connecting part and the second connecting part are both connecting holes, and the fasteners are expansion bolts that mate with the connecting holes. Alternatively, the wall frame, the vertical beam, and the ring beam are all made of structural steel. The first connecting part is a first connecting plate protruding from the surface of the vertical beam and the ring beam, and the second connecting part is a second connecting plate protruding from the surface of the wall frame. The first connecting plate and the second connecting plate are arranged parallel to each other or perpendicular to each other. The first connecting plate and the second connecting plate are welded together or bolted together.

[0015] In the above scheme, when both the main frame and the wall frame are made of reinforced concrete, the structural strength and load-bearing capacity of each part of the entire brick wall structure are relatively uniform, and the overall structural strength is high. When the main frame is constructed of steel profiles and the wall frame is made of reinforced concrete, the steel profiles are lighter than the reinforced concrete structure. This allows for a lighter design of the main frame while ensuring structural strength, thereby reducing the self-weight of the main frame and reducing the horizontal load on the main wall, which in turn reduces the horizontal load on the backfilling tank. In addition, in the above scheme, both the connection structure between the connecting holes and the expansion bolts and the connection structure between the first connecting plate and the second connecting plate have the advantages of simple structure and reliable connection, which facilitates improved construction efficiency and saves construction costs.

[0016] In a preferred embodiment of this application, the support member is made of an elastic metal material, and the buffer layer is made of a non-metallic material; the buffer layer fills the gap between the main wall and the soil-covering tank, and is used to absorb and buffer the interaction force between the main wall and / or the main frame and the soil-covering tank.

[0017] The above solution utilizes support components made of elastic metal materials to achieve a support connection between the main frame, main wall, and soil-covering tank, while also acting as a buffer and energy absorber for the main frame, main wall, and soil-covering tank.

[0018] In a preferred embodiment of this application, the pressure cap is arched, including an arched main body and a right-angle connecting portion disposed circumferentially along the edge of the arched main body; the arched main body includes an arched frame and an arched top unit disposed on the arched frame; the right-angle connecting portion includes a horizontal portion and a vertical portion; the horizontal portion extends horizontally away from the arched main body and its extension distance is not less than the horizontal thickness of the main frame, and the vertical portion extends vertically downward and is connected to the end of the horizontal portion away from the arched main body.

[0019] The above scheme uses an arched cap to facilitate the design of the arched structure of the soil covering tank inside. At the same time, the arched structure has a higher load-bearing capacity and better waterproofing and drainage compared to the flat structure. In the above scheme, the arched cap is connected to the main frame and / or main wall through right-angle connectors. The connection structure is simple, reliable, and has high assembly efficiency.

[0020] In a preferred embodiment of this application, the horizontal portion is disposed on the upper part of the main frame and the wall; the lower part of the horizontal portion is provided with a connecting rod extending toward the main frame and the wall, and the extension direction of the connecting rod is biased toward the soil covering tank relative to the vertical direction; the upper part of the main frame and / or the wall is provided with a first mounting hole corresponding to the connecting rod; the vertical portion is provided with a second through hole penetrating the vertical portion in the horizontal direction; the upper side wall of the main frame has a second mounting hole corresponding to the second through hole; a fastening bolt passes through the second through hole and extends into the second mounting hole to lock and fix the vertical portion to the main frame; and in the horizontal direction, there is a filling space between the end of the fastening bolt away from the main frame and the opening of the second through hole, and the filling space is filled with waterproof sealing material.

[0021] By adopting the above solution, the horizontal and vertical parts are connected to the main frame and main wall, and the self-weight of the arched cap is utilized to effectively limit and fix the arched cap in both the vertical and horizontal directions. Furthermore, the mating structure between the connecting rod and the first assembly hole, as well as the mating structure between the second through hole, the second assembly hole and the fastening bolt, have low processing costs, are easy to assemble, and have reliable connections. In addition, by filling the above-mentioned filling space with waterproof sealing material, external moisture can be prevented from invading the connection structure and causing erosion to the connection structure, the main frame, and the main wall.

[0022] In a preferred embodiment of this application, the arched frame includes an arched bottom mesh and an arched steel frame disposed on the upper part of the arched bottom mesh; the arched top unit is a precast component formed by precast concrete and steel reinforcement skeleton, and the arched top unit is fixedly connected to the arched steel frame; or, the arched steel frame has a casting groove, and the arched top unit is formed by directly casting concrete into the casting groove.

[0023] Using the above scheme, the entire arched frame can be assembled from multiple arched steel frames, which facilitates the construction of the capping at high altitudes through hoisting and other methods. At the same time, laying prefabricated arch units or directly pouring concrete after the arched frame is built helps to reduce the hoisting weight during construction, thereby reducing construction difficulty, improving construction efficiency, and also helping to ensure construction safety.

[0024] In a preferred embodiment of this application, a waterproof layer is provided on the upper part of the pressure cap, the waterproof layer including anti-corrosion paint coated on the upper surface of the pressure cap and / or EPS board disposed on the upper part of the pressure cap; the EPS board is bonded to the upper part of the pressure cap.

[0025] By adopting the above solution, the waterproof and corrosion-resistant capabilities of the pressure cap can be greatly improved by applying anti-corrosion paint to the top of the pressure cap and installing EPS boards. Moreover, the solution is easy to install and has low maintenance and repair costs.

[0026] Secondly, this application also discloses a construction method for prefabricated earth-covered brick walls, used to construct the prefabricated earth-covered brick wall structure as described above, including the following steps:

[0027] S1: Prepare materials, select prefabricated components, metal profiles and structural components, as well as their quantity and size, according to the structure and size of the soil covering tank, and transport them to the construction site; wherein the prefabricated components include wall foundations, brick wall units, and arch units, and the metal profiles include wall frames, vertical beams, ring beams, support components, arch steel frames and other assembly accessories such as fasteners required.

[0028] S2: Fix the precast wall foundation. Dig a foundation trench on the ground around the soil tank according to the size of the wall foundation. After digging the foundation trench, hoist the wall foundation into the foundation trench and then pour concrete into the foundation trench to fix the wall foundation in the foundation trench.

[0029] S3: To build a single-layer main frame, first fix a ring beam on the inner and outer sides of the upper part of the wall foundation, and then fix multiple vertical beams that cooperate with the ring beam at even intervals along the circumference to the pre-set connection points on the bottom ring beam.

[0030] S4: Construct a single-layer main wall, set up a wall frame between the fixed main frames, install brick wall units on the wall frame, and connect the first and second connecting parts with bolts and fasteners to fix the wall frame and brick wall units to the main frame.

[0031] S5: Construct a single-layer buffer support layer. Connect a support component made of constant elastic alloy material to the side of the fixed main frame facing the soil covering tank, and fill the space between the fixed main wall and the soil covering tank with fine sand to form a buffer layer.

[0032] S6: Vertically from bottom to top, build a new main frame on the basis of the lower main frame, and repeat steps S4 and S5 until the height of the main frame, main wall and buffer support layer is the same as or higher than the height of the cover tank.

[0033] S7: Install the capping. After completing step S6, first hoist the bottom mesh and the prefabricated arched steel frame to the top of the main frame, main wall and buffer support layer and assemble and connect them with the assembly accessories. Then pour concrete into the pouring groove of the arched steel frame to form the capping.

[0034] S8: Lay the waterproof layer. After completing step S7, first apply anti-corrosion paint to the upper surface of the capping, and then attach EPS boards to the upper part of the capping so that the EPS boards cover the upper surface of the capping.

[0035] Compared with traditional construction methods, the above-mentioned scheme greatly improves construction efficiency, shortens the construction cycle, facilitates the early commissioning of the covering tank, and saves on construction material and time costs. Furthermore, the above-mentioned construction scheme facilitates quality supervision during the construction process, ensures construction quality, and improves the environmental friendliness of the construction process. Attached Figure Description

[0036] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and, together with their description, serve to explain this application and do not constitute an undue limitation of the invention. In the drawings:

[0037] Figure 1 This is a structural diagram of a prefabricated earth-covered brick wall structure.

[0038] Figure 2 for Figure 1 A magnified structural diagram of part A in the middle;

[0039] Figure 3 for Figure 1 A magnified structural diagram of part B in the middle section;

[0040] Figure 4 for Figure 1 A magnified structural diagram of section C;

[0041] Figure 5 This is a schematic diagram of an arched coping structure.

[0042] Figure 6 This is a partial structural diagram of a brick wall unit.

[0043] in,

[0044] 1. Covering pot;

[0045] 21 Vertical beam, 22 Ring beam, 23 First connecting part;

[0046] 31 Wall frame, 311 First through hole, 32 Brick wall unit, 321 First through pipe, 322 Mating part, 323 Locking part, 33 Second connecting part;

[0047] 41 Buffer layer, 42 Support component;

[0048] 5. Top cap, 51. Arched main body, 511. Arched frame, 512. Arched top unit, 52. Right angle connection, 521. Horizontal part, 522. Vertical part, 523. Connecting rod, 524. Second perforation;

[0049] 61 First assembly hole, 62 Second assembly hole, 63 Fastening bolt, 64 Filling space, 65 Waterproof sealing material;

[0050] 71 Anti-corrosion paint, 72 EPS board;

[0051] 8. Wall foundation;

[0052] 9. Foundation. Detailed Implementation

[0053] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0054] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0055] Furthermore, in the description of this invention, it should be understood that the terms "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0056] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0057] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0058] like Figure 1-6As shown, this invention provides a prefabricated earth-covered brick wall structure and its construction method. The prefabricated earth-covered brick wall structure is located on the outer side of the earth-covered tank 1 wall and mainly includes a main frame, a wall foundation 8, a wall, and a capping 5. The wall includes a main wall and a buffer support layer, which is located on the side of the main wall facing the earth-covered tank 1 or on both sides of the main wall. The main frame is connected to the wall foundation 8 and includes vertical beams 21 arranged vertically and ring beams 22 arranged horizontally. Multiple vertical beams 21 and ring beams 22 are evenly distributed on the inner and outer sides of the main wall. The buffer support layer includes a buffer layer 41 and support members 42. One end of the support member 42 is connected to the main frame to support the buffer layer 41, and the other end of the support member 42 contacts and engages with the outer wall of the earth-covered tank 1.

[0059] Using the above scheme, the main frame, wall foundation 8, main wall, and buffer support layer can all be constructed using prefabricated components or a combination of prefabricated components and on-site construction. Compared with the existing construction method that relies entirely on on-site construction, this can greatly improve construction efficiency, shorten the construction cycle, and thus help reduce construction costs. At the same time, using the above-mentioned prefabricated earth-covered brick wall structure makes it convenient to monitor the quality of each prefabricated component before and during construction, which helps to ensure the construction quality and thus guarantee the structural strength of the entire prefabricated earth-covered brick wall structure, so as to better play the role of support, buffer, and protection between the earth-covered layer and the earth-covered tank 1.

[0060] In a preferred embodiment of this application, the support member 42 is made of an elastic metal material, and the buffer layer 41 is made of a non-metallic material. The buffer layer 41 fills the gap between the main wall and the covering tank 1, and is used to absorb and buffer the interaction force between the main wall and / or the main frame and the covering tank 1. With this solution, the support member 42, made of an elastic metal material, not only provides a supporting connection between the main frame, the main wall, and the covering tank 1, but also acts as a buffer and absorbs energy within the main frame, the main wall, and the covering tank 1. Preferably, the support member 42 can be made of a constant elastic alloy, such as Ni42CrTiAl, Ni43CrTiAl, Ni42CrTiAlMoCu, etc., so that the support member 42 can adapt to the temperature of the covering tank 1 under different medium storage conditions, ensuring the elastic support and elastic buffering effect of the support member 42. Of course, the above example is only a preferred embodiment of this application, and the support member 42 can also be made of other elastic alloy materials such as beryllium bronze.

[0061] Reference Figure 1-4As shown, in one example, the main wall includes a wall frame 31 and brick wall units 32. The wall frame 31 has multiple mounting slots, and the brick wall units 32 are fixedly installed in the mounting slots. The brick wall unit 32 includes a precast skeleton and bricks laid on the precast skeleton, as shown in the figure. Figure 6 As shown, the precast frame has mutually adaptable mating parts 322 and locking parts 323 on its side. Two adjacent brick wall units 32 are joined together by the mating parts 322 and locking parts 323. The precast frame also has first through-tubes 321 arranged vertically and / or horizontally. The first through-tubes 321 in adjacent brick wall units 32 are interconnected. Each mounting grid has a first through-hole 311 corresponding to the first through-tube 321. Reinforcing bars can pass through the first through-hole 311 and the first through-tube 321 to connect the brick wall units 32 in adjacent mounting grids. Specifically, the mating parts 322 and locking parts 323 are mutually adaptable grooves and protrusions on the side of the precast frame. Their structure is simple, easy to process, low in processing cost, and simultaneously provides a positioning effect, facilitating assembly. In the above scheme, the mating structure between the brick wall unit 32 and the mounting grid is simple and easy to install. Furthermore, the engagement of the mating part 322 and the locking part 323 between the brick wall units 32, and the restriction of the brick wall unit 32 and the mounting grid by the steel bars passing through the first through hole 311 and the first through pipe 321, ensures that the connection structure between each brick wall unit 32 and between the mounting grid and the brick wall unit 32 has sufficient structural strength and stability. This helps to improve the load-bearing capacity of the entire prefabricated earth-covered brick wall structure for the earth cover, preventing the earth cover pressure from directly compressing the earth cover tank 1, which could lead to deformation or even damage and rupture of the pipe. It should be noted that the above examples are only preferred embodiments of this application, and other schemes besides the examples can also be adopted. This application does not specifically limit the connection method and connection structure between the brick wall units 32 or between the brick wall unit 32 and the mounting grid.

[0062] Furthermore, referring to Figure 2 and Figure 3 As shown, the vertical beam 21 and the ring beam 22 are provided with a first connecting part 23 on the side facing the main wall, and the wall frame 31 and / or brick wall unit 32 have a second connecting part 33 adapted to the first connecting part 23 on the side facing the main frame; it also includes fasteners that are respectively connected to the first connecting part 23 and the second connecting part 33, and the first connecting part 23 and the second connecting part 33 are locked together by the fasteners so that the main frame is fixedly connected to the main wall. With the above structure, the first connecting part 23, the second connecting part 33 and the fasteners are connected in the horizontal direction, so that the main frame and the main wall can be firmly connected together in the horizontal direction. With the cooperation of the aforementioned steel bars passing through the first through hole 311 and the first through pipe 321, the main wall is fixed in both the vertical and horizontal directions, which greatly improves the construction quality while ensuring construction efficiency.

[0063] Specifically, in one example, the wall frame 31, vertical beam 21, and ring beam 22 are all made of reinforced concrete. The first connection part 23 and the second connection part 33 are both connection holes, and the fasteners are expansion bolts that mate with the connection holes. In another example, the wall frame 31, vertical beam 21, and ring beam 22 are all made of structural steel. The first connection part 23 is a first connecting plate protruding from the surface of the vertical beam 21 and the ring beam 22. The second connection part 33 is a second connecting plate protruding from the surface of the wall frame 31. The first connecting plate and the second connecting plate are parallel to each other or the second connecting plate is perpendicular to each other. The first connecting plate and the second connecting plate are welded together or bolted together.

[0064] As a preferred embodiment of this application, the ring beam 22 can adopt a segmented structure, that is, it is divided into multiple segments along the circumference of the ring beam 22. Compared with an integral structure, this segmented structure makes it easier to transport, lift and assemble the ring beam 22, greatly reducing the difficulty and risk of lifting, and facilitating adjustments during construction, resulting in higher assembly efficiency.

[0065] In the above scheme, when both the main frame and the wall frame 31 are made of reinforced concrete, the structural strength and load-bearing capacity of each part of the entire brick wall structure are relatively uniform, and the overall structural strength is high. When the main frame is made of steel and the wall frame 31 is made of reinforced concrete, the steel is lighter than the reinforced concrete structure. While ensuring structural strength, it is conducive to the lightweight design of the main frame, thereby reducing the self-weight of the main frame, which helps to reduce the load on the main wall in the horizontal direction, and thus helps to reduce the load on the soil covering tank 1 in the horizontal direction. In addition, in the above scheme, both the connection structure of the connecting hole and the expansion bolt and the connection structure between the first connecting plate and the second connecting plate have the advantages of simple structure and reliable connection, which facilitates the improvement of construction efficiency and saves construction costs.

[0066] Furthermore, referring to Figure 1 and Figure 4 and Figure 5As shown, in a preferred embodiment of this application, the pressure cap 5 is arched in shape, including an arched body 51 and a right-angle connecting portion 52 disposed circumferentially on the edge of the arched body 51; the arched body 51 includes an arched frame 511 and an arched top unit 512 disposed on the arched frame 511; the right-angle connecting portion 52 includes a horizontal portion 521 and a vertical portion 522; the horizontal portion 521 extends horizontally away from the arched body 51 and its extension distance is not less than the horizontal thickness of the main frame, and the vertical portion 522 extends vertically downward and is connected to the end of the horizontal portion 521 away from the arched body 51. With the above structure, the arched cap 5 facilitates the design of the arched structure of the soil covering tank 1 inside to improve its load-bearing capacity, or facilitates the connection of the rope structure inside the cap 5 with the existing flat top structure of the soil covering tank 1, thereby stretching the existing flat top structure of the soil covering tank 1 in the vertical direction to improve its load-bearing capacity. At the same time, compared with the flat top structure, the arched structure has more installation and operation space inside, which facilitates the maintenance of the soil covering tank 1. It also has a higher load-bearing capacity and better waterproofing and drainage effects. In the above scheme, the arched cap 5 is connected to the main frame and / or main wall through the right-angle connecting part 52. Its connection structure is simple, reliable, and has high assembly efficiency.

[0067] In one example, refer to Figure 1 and Figure 4As shown, the horizontal part 521 is provided on the upper part of the main frame and the wall; the lower part of the horizontal part 521 is provided with a connecting rod 523 extending toward the main frame and the wall, and the extension direction of the connecting rod 523 is biased toward the soil covering tank 1 relative to the vertical direction; the upper part of the main frame and / or the wall is provided with a first mounting hole 61 corresponding to the connecting rod 523; the vertical part 522 is provided with a second through hole 524 that passes through the vertical part 522 in the horizontal direction; the upper side wall of the main frame is provided with a second mounting hole 62 corresponding to the second through hole 524; the fastening bolt 63 passes through the second through hole 524 and extends into the second mounting hole 62 to lock and fix the vertical part 522 to the main frame; and in the horizontal direction, there is a filling space 64 between the end of the fastening bolt 63 away from the main frame and the opening of the second through hole 524, and the filling space 64 is filled with waterproof sealing material 65. By adopting the above scheme, the connection between the horizontal part 521 and the vertical part 522 and the main frame and main wall, combined with the self-weight of the arched cap 5, can effectively limit and fix the arched cap 5 in both the vertical and horizontal directions. Furthermore, the mating structure between the connecting rod 523 and the first mounting hole 61, and the mating structure between the second through hole 524, the second mounting hole 62 and the fastening bolt 63, have low processing costs, are easy to assemble, and provide reliable connections. In addition, filling the filling space 64 with waterproof sealing material 65 can prevent external moisture from intruding into the connection structure and causing erosion to the connection structure, main frame, and main wall. Preferably, phase change material or expanding foam can be used to fill and seal the filling space 64. Furthermore, the horizontal extension length of the filling space 64 should not be too long, preferably 20mm-35mm, to facilitate the subsequent removal of the waterproof sealing material 65 and the loosening and removal of the fastening bolt 63.

[0068] Furthermore, referring to Figure 5 As shown, the arched frame 511 includes an arched bottom grid and an arched steel frame set on the upper part of the arched bottom grid; the arched top unit 512 is a precast component made of precast concrete and steel reinforcement, and the arched top unit 512 is fixedly connected to the arched steel frame; or, the arched steel frame has a casting groove, and the arched top unit 512 is formed by directly pouring concrete into the casting groove. Using the above scheme, the entire arched frame 511 can be assembled from multiple arched steel frames, thus facilitating the construction of the capping 5 at heights via hoisting or other methods. Furthermore, laying the precast arched top unit 512 or directly pouring concrete after the arched frame 511 is constructed helps reduce the hoisting weight during construction, thereby reducing construction difficulty, improving construction efficiency, and also helping to ensure construction safety.

[0069] Furthermore, in a preferred embodiment of this application, a waterproof layer is provided on the upper part of the capping 5. The waterproof layer includes an anti-corrosion paint 71 coated on the upper surface of the capping 5 and / or an EPS board 72 disposed on the upper part of the capping 5; preferably, the EPS board 72 is bonded to the upper part of the capping 5. By adopting the above solution, the waterproof and anti-corrosion capabilities of the capping 5 can be greatly improved by coating the top of the capping 5 with anti-corrosion paint 71 and providing the EPS board 72. Moreover, it is convenient to install and has low maintenance and repair costs.

[0070] Based on the structure of the prefabricated brick wall shown in the attached drawings, this application also provides a construction method for a prefabricated earth-covered brick wall, used to construct the prefabricated earth-covered brick wall structure as described above, mainly including the following steps:

[0071] S1: Prepare materials. Based on the structure and dimensions of the covering tank 1, select precast components, metal profiles, and structural parts, as well as their quantities and dimensions, and transport them to the construction site. The precast components include wall foundations 8, brick wall units 32, and arch units 512. The metal profiles include wall frames 31, vertical beams 21, ring beams 22, support members 42, arched steel frames, and other necessary fasteners and assembly accessories. Step S1 allows for an inventory of all materials and manpower required for construction in the early stages, facilitating the planning of more efficient construction management methods. It also helps avoid problems such as insufficient materials or manpower affecting construction quality and delaying the construction period.

[0072] S2: Fix the prefabricated wall foundation 8. Dig a foundation trench on the foundation 9 around the soil tank 1 according to the size of the wall foundation 8. After digging the foundation trench, hoist the wall foundation 8 into the foundation trench and then pour concrete into the foundation trench to fix the wall foundation 8 in the foundation trench. Through step S2, a stable wall foundation 8 can be quickly built around the soil tank 1, laying a solid foundation for subsequent construction steps.

[0073] S3: Construct a single-layer main frame. First, fix a ring beam 22 on the inner and outer sides of the upper part of the wall foundation 8. Then, fix multiple vertical beams 21 that cooperate with the ring beam 22 at even intervals along the circumference to the pre-set connection points on the bottom ring beam 22.

[0074] S4: Construct a single-layer main wall, set up a wall frame 31 between the fixed main frames and install brick wall units 32 on the wall frame 31, and connect the first connecting part 23 and the second connecting part 33 with bolt fasteners so that the wall frame 31 and the brick wall unit 32 are fixedly connected to the main frame.

[0075] S5: Construct a single-layer buffer support layer, connect the support component 42 made of constant elastic alloy material to the side of the fixed main frame facing the soil covering tank 1, and fill the space between the fixed main wall and the soil covering tank 1 with fine sand to form a buffer layer 41.

[0076] S6: In the vertical direction from bottom to top, build a new main frame on the basis of the lower main frame, and repeat steps S4 and S5 until the height of the main frame, main wall and buffer support layer is level with or higher than the height of the cover tank 1.

[0077] By performing the above steps S3-S6, the main frame, main walls, and buffer support layer can be constructed. The construction operation is standardized and modularized, which is more efficient and easier to manage, and both construction efficiency and construction quality can be effectively guaranteed.

[0078] S7: Install capping 5. After completing step S6, first hoist the bottom net and the prefabricated arched steel frame to the top of the main frame, main wall and buffer support layer and assemble and connect them with the assembly accessories. Then pour concrete into the pouring groove of the arched steel frame to form capping 5.

[0079] S8: Lay a waterproof layer. After completing step S7, first apply anti-corrosion paint 71 to the upper surface of the capping 5, and then attach EPS board 72 to the upper part of the capping 5 so that the EPS board 72 covers the upper surface of the capping 5.

[0080] Compared with traditional construction methods, the above-mentioned scheme greatly improves construction efficiency, shortens the construction cycle, facilitates the early commissioning of the soil covering tank 1, and saves construction material and time costs. Furthermore, the above-mentioned construction scheme is conducive to quality supervision during the construction process and ensures construction quality.

[0081] For any parts not mentioned in this invention, existing technologies can be used or referenced.

[0082] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0083] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A prefabricated earth-covered brick wall structure, installed on the outside of an earth-covering tank, characterized in that, It includes a wall foundation, a wall, and a coping; the wall includes a main wall and a buffer support layer, wherein the buffer support layer is disposed on the side of the main wall facing the cover tank or on both sides of the main wall; It also includes a main frame for setting up the main wall, the main frame being connected to the wall foundation, including vertical beams and horizontal ring beams, with multiple vertical beams and ring beams evenly distributed on the inner and outer sides of the main wall; the buffer support layer includes a buffer layer and a support member, one end of the support member being connected to the main frame for supporting the buffer layer, and the other end of the support member contacting and engaging with the outer wall of the soil covering tank; The main wall includes a wall frame and brick wall units. The wall frame has multiple mounting slots, and the brick wall units are fixedly installed in the mounting slots. Each brick wall unit includes a precast skeleton and bricks laid on the precast skeleton. The precast skeleton has mutually adaptable mating parts and locking parts on its side. Two connected brick wall units are joined together by the mating parts and locking parts. The precast skeleton also has a first through pipe arranged in the vertical and / or horizontal direction. The first through pipes in two adjacent brick wall units are interconnected. The wall frame has a first through hole corresponding to the first through pipe. Reinforcing bars can be inserted into the first through hole and the first through pipe to connect the brick wall units arranged in adjacent mounting slots. The vertical beam and the ring beam are provided with a first connecting part on the side facing the main wall, and the wall frame and / or the brick wall unit have a second connecting part adapted to the first connecting part on the side facing the main frame; it also includes fasteners that are respectively connected to the first connecting part and the second connecting part, and the first connecting part and the second connecting part are locked together by the fasteners so that the main frame is fixedly connected to the main wall.

2. The prefabricated earth-covered brick wall structure as described in claim 1, characterized in that, The wall frame, the vertical beam and the ring beam are all made of reinforced concrete. The first connection part and the second connection part are both connection holes. The fasteners are expansion bolts that mate with the connection holes. Alternatively, the wall frame, the vertical beam, and the ring beam are all made of structural steel. The first connecting part is a first connecting plate protruding from the surface of the vertical beam and the ring beam, and the second connecting part is a second connecting plate protruding from the surface of the wall frame. The first connecting plate and the second connecting plate are arranged parallel to each other or the second connecting plate is arranged perpendicular to each other. The first connecting plate and the second connecting plate are welded and fixed or the first connecting plate and the second connecting plate are fixedly connected by bolts.

3. The prefabricated earth-covered brick wall structure as described in claim 1, characterized in that, The support component is made of elastic metal material, and the buffer layer is made of non-metallic material; the buffer layer fills the gap between the main wall and the soil covering tank, and is used to absorb and buffer the interaction force between the main wall and / or the main frame and the soil covering tank.

4. The prefabricated earth-covered brick wall structure as described in claim 3, characterized in that, The capping is arched, including an arched main body and a right-angle connecting part arranged circumferentially on the edge of the arched main body; the arched main body includes an arched frame and an arched top unit arranged on the arched frame; the right-angle connecting part includes a horizontal part and a vertical part; the horizontal part extends horizontally away from the arched main body and its extension distance is not less than the horizontal thickness of the main frame, and the vertical part extends vertically downward and is connected to the end of the horizontal part away from the arched main body.

5. The prefabricated earth-covered brick wall structure as described in claim 4, characterized in that, The horizontal part is provided on the upper part of the main frame and the wall; the lower part of the horizontal part is provided with a connecting rod extending toward the main frame and the wall, and the extension direction of the connecting rod is biased toward the soil covering tank relative to the vertical direction; the upper part of the main frame and / or the wall is provided with a first assembly hole corresponding to the connecting rod. The vertical part has a second through hole that extends horizontally through the vertical part. The upper side wall of the main frame has a second mounting hole corresponding to the second through hole. The fastening bolt passes through the second through hole and extends into the second mounting hole to lock and fix the vertical part to the main frame. In addition, in the horizontal direction, there is a filling space between the end of the fastening bolt away from the main frame and the opening of the second through hole. The filling space is filled with waterproof sealing material.

6. The prefabricated earth-covered brick wall structure as described in claim 5, characterized in that, The arched frame includes an arched bottom mesh and an arched steel frame disposed on the upper part of the arched bottom mesh; The arch unit is a precast component made of concrete and a steel reinforcement frame, and the arch unit is fixedly connected to the arched steel frame; or, the arched steel frame has a casting groove, and the arch unit is formed by directly pouring concrete into the casting groove.

7. The prefabricated earth-covered brick wall structure as described in claim 6, characterized in that, A waterproof layer is provided on the upper part of the pressure cap. The waterproof layer includes anti-corrosion paint coated on the upper surface of the pressure cap and / or EPS board disposed on the upper part of the pressure cap; the EPS board is bonded to the upper part of the pressure cap.

8. A construction method for a prefabricated earth-covered brick wall structure, characterized in that, For constructing a prefabricated earth-covered brick wall structure as described in any one of claims 1-7, the following steps are included: S1: Prepare materials, select prefabricated components, metal profiles and structural components, as well as their quantity and size, according to the structure and size of the soil covering tank, and transport them to the construction site; wherein the prefabricated components include wall foundations, brick wall units, and arch units, and the metal profiles include wall frames, vertical beams, ring beams, supports, arch steel frames, fasteners and other assembly accessories. S2: Fix the precast wall foundation. Dig a foundation trench on the ground around the soil tank according to the size of the wall foundation. After digging the foundation trench, hoist the wall foundation into the foundation trench and then pour concrete into the foundation trench to fix the wall foundation in the foundation trench. S3: To build a single-layer main frame, first fix a ring beam on the inner and outer sides of the upper part of the wall foundation, and then fix multiple vertical beams that cooperate with the ring beam at even intervals along the circumference to the pre-set connection points on the bottom ring beam. S4: Construct a single-layer main wall, set up a wall frame between the fixed main frames, install brick wall units on the wall frame, and connect the first and second connecting parts with bolts and fasteners to fix the wall frame and brick wall units to the main frame. S5: Construct a single-layer buffer support layer. Connect a support component made of constant elastic alloy material to the side of the fixed main frame facing the soil covering tank, and fill the space between the fixed main wall and the soil covering tank with fine sand to form a buffer layer. S6: Vertically from bottom to top, build a new main frame on the basis of the lower main frame, and repeat steps S4 and S5 until the height of the main frame, main wall and buffer support layer is the same as or higher than the height of the cover tank. S7: Install the capping. After completing step S6, first hoist the bottom mesh and the prefabricated arched steel frame to the top of the main frame, main wall and buffer support layer and assemble and connect them with the assembly accessories. Then pour concrete into the pouring groove of the arched steel frame to form the capping. S8: Lay the waterproof layer. After completing step S7, first apply anti-corrosion paint to the upper surface of the capping, and then attach EPS boards to the upper part of the capping so that the EPS boards cover the upper surface of the capping.

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