Prefabricated wall structures with grouting sleeve connections in low-temperature environments and their construction methods

Abstract

This application relates to a prefabricated wall structure with grouting sleeve connection in low-temperature environments and its construction method. The construction method includes: inserting multiple sleeves into the ends of the vertical reinforcing bars of a first reinforcing mesh; sequentially wrapping heating elements around the perimeter of the multiple sleeves; pouring grout into the first reinforcing mesh to form a prefabricated wall, with a communicating cavity formed inside the wall that communicates with all the sleeves; the ends of the heating elements extending from the wall and electrically connected to a temperature control component; inserting the vertical reinforcing bars in the floor slab into the sleeves at the ends away from the first reinforcing mesh, injecting grout into the grouting ports, and filling each sleeve through the communicating cavity; using the temperature control component to control the heating elements to heat the sleeves to a preset temperature, and achieving the connection between the wall and the floor slab after the grout has solidified. This application uses built-in heating elements to heat the wall concrete and the grout inside the sleeves, actively regulating the temperature of the grout inside the sleeves, thus playing a role in heating and temperature control. Even in low-temperature environments, the grout can solidify and harden at a suitable temperature, thereby improving the strength and durability of the grout and ensuring a firm connection between the prefabricated walls.

Description

Technical Field

[0001] This application relates to the field of prefabricated building technology, and in particular to a prefabricated wall structure with grouting sleeve connection in a low-temperature environment and its construction method. Background Technology

[0002] With the development of the construction industry, prefabricated construction, as a new type of construction method, has gradually attracted widespread attention from the industry due to its advantages such as fast construction speed, high quality, environmental protection, and energy saving. Prefabricated construction greatly improves construction efficiency and shortens the project cycle by prefabricating various parts of the building in a factory and then transporting them to the construction site for rapid assembly.

[0003] Prefabricated building technology mainly includes three stages: the production of prefabricated components, transportation, and on-site assembly. Prefabricated components include walls, floor slabs, stairs, and roofs. These components are precisely manufactured in factories according to design drawings, ensuring consistency in quality and dimensions. Protective measures for prefabricated components during transportation are also crucial to prevent damage. On-site, through precise positioning and connection technologies, the individual prefabricated components are quickly assembled into a complete building structure.

[0004] However, during the construction of prefabricated buildings, after the bottom reinforcing bars are inserted into the holes in the precast wall above, grout needs to be injected into the holes to achieve structural connection and fixation. But in low-temperature environments, the temperature of the grout is often difficult to reach the temperature required for solidification and hardening, which directly affects the solidification quality of the grout and the stability of the structure. Summary of the Invention

[0005] To address the issue that grout often fails to reach the required temperature for solidification and hardening in low-temperature environments, this application provides a prefabricated wall structure with grout sleeve connection in low-temperature environments and its construction method.

[0006] This application provides a prefabricated wall structure with grouting sleeve connection in low-temperature environments and its construction method, which adopts the following technical solution:

[0007] Firstly, a construction method for a prefabricated wall structure with grouting sleeve connection in a low-temperature environment includes the following steps:

[0008] A first steel mesh and a plurality of sleeves are provided. The sleeves are hollow and open at both ends. The sleeves are provided with a grout outlet and a grouting outlet. The plurality of sleeves are inserted at intervals along the length of the first steel mesh at the ends of the vertical steel bars of the first steel mesh.

[0009] A flexible heating element is provided, which is sequentially wrapped around the periphery of a plurality of sleeves;

[0010] Grout is poured into the first steel mesh to form a prefabricated wall, so that multiple sleeves and heating elements are prefabricated in the wall. A communicating cavity is formed in the wall that communicates with multiple sleeves. The end of the heating element extends out of the wall and is electrically connected to the temperature control component. The grout outlet, the grouting port, and the end of the sleeve away from the first steel mesh are all connected to the outside.

[0011] A floor slab is provided, in which a second steel mesh is prefabricated. The vertical steel bars of the second steel mesh are inserted into the sleeve at the end away from the first steel mesh. The grouting port is located below the grout outlet. Grouting material is injected into the grouting port, and the grouting material fills each sleeve through the connecting cavity.

[0012] The temperature control component is used to control the heating element to heat the sleeve to a preset temperature. After the grout solidifies, the connection between the wall and the floor slab is achieved.

[0013] By adopting the above technical solution, when connecting the wall and the floor slab, the reinforcing steel of the floor slab is inserted into the sleeve, and grout is injected into the sleeve. Through the built-in heating element, both the wall concrete and the grout in the sleeve can be heated. The temperature of the grout in the sleeve can be actively regulated, ensuring that even in low-temperature environments, the grout can solidify and harden at a suitable temperature, thereby improving the strength and durability of the grout and ensuring a firm connection between the prefabricated walls. The prefabricated heating element and insulation layer enable precise control of the grout solidification process, accelerating construction speed and improving construction efficiency. Simultaneously, it allows for construction in a wider range of climatic conditions, expanding the application scope of prefabricated buildings.

[0014] Optionally, after the wall is formed, an insulation layer is detachably connected to the outer surface of the wall corresponding to the sleeve.

[0015] By adopting the above technical solution, the insulation layer can delay heat loss and improve heating efficiency, enabling the built-in heating element to transfer heat to the grouting material more quickly and accelerate the solidification process.

[0016] Optionally, after the connection between the wall and the floor is established, the insulation layer can be removed.

[0017] By adopting the above technical solution, the insulation layer can be detachably attached to the outer surface of the wall, and the insulation layer can be recycled and reused, reducing production costs.

[0018] Optionally, the inner wall of the sleeve is provided with a plurality of spaced through grooves along the circumferential direction.

[0019] By adopting the above technical solution, the effective bonding area and bond strength between the sleeve and the grout can be increased, and the reinforcing bars of the first and second reinforcing mesh will not be obstructed when entering the sleeve.

[0020] Optionally, the inner sidewall of the sleeve is provided with a plurality of protrusions at intervals.

[0021] By adopting the above technical solution, the heat transfer efficiency is improved, and the heat generated by the heating element is more evenly distributed in the grout. The presence of the protrusion also enhances the mechanical interlocking between the sleeve and the grout, and improves the stability of the connection.

[0022] Optionally, the outer wall of the sleeve is provided with a plurality of protrusions at intervals.

[0023] By adopting the above technical solution, the contact area between the sleeve and the wall can be increased, improving heat transfer efficiency and helping to accelerate the solidification process of the grout in low-temperature environments. The protrusions enhance the mechanical interlocking between the sleeve and the wall, improving the overall stability and connection strength of the structure.

[0024] Optionally, the heating element is wound around the sleeve and engaged between adjacent protrusions.

[0025] By adopting the above technical solution, the protrusion can limit the position of the heating element, ensuring that the heating element will not be displaced due to the flow of grout or construction operations during the wall pouring process, thereby ensuring the uniformity and reliability of the heating effect.

[0026] Optionally, the multiple sleeves are arranged in two rows and staggered, and the heating element is arranged in a wave-like pattern.

[0027] By adopting the above technical solution, the heating elements are more evenly distributed throughout the wall, and the wavy heating wire further increases the surface area in contact with the grout, thereby achieving more balanced heat transfer in the width direction of the wall.

[0028] Optionally, the heating element is an electric heating wire, with both ends of the electric heating wire located outside the wall, and the middle part folded in half to form two heating sections, which are wound around the sleeve at intervals.

[0029] By adopting the above technical solution, the electrical connection between the heating element and the temperature control component can be guaranteed, and the two electrical connection points can be located on the same side of the wall, reducing the length of the external wires and making it easier for construction personnel to operate; at the same time, the contact area between the heating element and the sleeve can be increased, thereby improving the heat transfer efficiency.

[0030] Optionally, after the two heating sections are connected and wrapped around the sleeve at the very end, the two heating sections are wrapped around the sleeve from the far side of the adjacent staggered sleeves, with one heating section located in the upper middle part of the sleeve and the other heating section located in the lower middle part of the sleeve.

[0031] By adopting the above technical solution, the two heating sections are located at different heights in the sleeve, which realizes layered heating of heat in the vertical direction. This helps to heat the grouting material in the entire sleeve more evenly and avoids local overheating or uneven solidification caused by concentrated heat.

[0032] Secondly, a prefabricated wall structure with grouting sleeve connection in low-temperature environments includes:

[0033] The wall is reinforced with a first steel mesh.

[0034] Multiple sleeves, hollow and open at both ends, are spaced apart along the length of the wall and one end is inserted into the first steel mesh; the multiple sleeves are prefabricated in the wall and have grout outlets and grouting ports communicating with the outside, and the other end of the sleeves is communicating with the outside; a communicating cavity is formed in the wall that communicates with the multiple sleeves.

[0035] A flexible heating element is sequentially arranged around the periphery of multiple sleeves and prefabricated in the wall. The end of the heating element extends out of the wall and is electrically connected to the temperature control component.

[0036] The floor slab has a second steel mesh installed inside, which is inserted at the other end of the sleeve. Grouting material is injected into both the sleeve and the connecting cavity to connect the wall and the floor slab.

[0037] In summary, this application includes at least one of the following beneficial technical effects:

[0038] 1. When connecting the wall to the floor slab, the steel bars of the floor slab are inserted into the sleeve, and grout is injected into the sleeve. Through the built-in heating element and the external insulation layer, the wall concrete and the grout in the sleeve can be heated. The temperature of the grout in the sleeve can be actively regulated. The insulation layer can delay heat loss. Even in low-temperature environments, the grout can solidify and harden at a suitable temperature, thereby improving the strength and durability of the grout and ensuring a firm connection between the prefabricated walls.

[0039] 2. Multiple sleeves are arranged in two rows and staggered, which makes the heating elements more evenly distributed throughout the wall. The wavy heating wire further increases the surface area in contact with the grout, thereby achieving more balanced heat transfer in the width direction of the wall. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the prefabricated wall structure with grouting sleeve connection in a low-temperature environment according to an embodiment of the present invention;

[0041] Figure 2 yes Figure 1 A structural diagram used to illustrate the internal structure of the wall;

[0042] Figure 3 yes Figure 2 A structural schematic diagram of point A (heating component hidden);

[0043] Figure 4 This is a schematic diagram illustrating a structure in one embodiment where both the inner and outer walls of the sleeve are provided with through grooves;

[0044] Figure 5 A structural diagram used to illustrate the arrangement of the sleeves;

[0045] Figure 6 This is a schematic diagram of the structure of the heating element being wound around the sleeve in one embodiment.

[0046] Explanation of reference numerals in the attached drawings: 1. Wall; 11. First steel mesh; 2. Sleeve; 21. Grout outlet; 22. Grouting port; 23. Protrusion; 24. Through groove; 3. Heating element; 31. Heating section; 4. Insulation layer; 5. Temperature control component; 6. Floor slab; 61. Second steel mesh. Detailed Implementation

[0047] The following will be combined with the appendix Figure 1-6 The technical solutions in the embodiments of this application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] This application discloses a prefabricated wall structure with grouting sleeve connection in a low-temperature environment and its construction method. The prefabricated wall structure is manufactured using this construction method. Specifically, the construction method of the prefabricated wall structure with grouting sleeve connection in a low-temperature environment includes the following steps:

[0050] A first steel mesh 11 and multiple sleeves 2 are provided. The sleeves 2 are hollow and open at both ends. The sleeves 2 have a grout outlet 21 and a grouting outlet 22. The multiple sleeves 2 are inserted at intervals along the length of the first steel mesh 11 into the ends of the vertical steel bars of the first steel mesh 11.

[0051] A flexible heating element 3 is provided, and the heating element 3 is sequentially wrapped around the periphery of multiple sleeves 2;

[0052] Grouting material is poured into the first steel mesh 11 to form a prefabricated wall 1, so that multiple sleeves 2 and heating elements 3 are prefabricated inside the wall 1. A connecting cavity is formed inside the wall 1 that is connected to multiple sleeves 2. The end of the heating element 3 extends out of the wall 1 and is electrically connected to the temperature control component 5. The grout outlet 21, grouting port 22 and the end of the sleeve 2 away from the first steel mesh 11 are all connected to the outside.

[0053] After the wall 1 is formed, the insulation layer 4 is detachably connected to the outer surface of the wall 1 corresponding to the sleeve 2.

[0054] A floor slab 6 is provided, and a second steel mesh 61 is prefabricated inside the floor slab 6. The vertical steel bars of the second steel mesh 61 are inserted into the sleeve 2 at the end away from the first steel mesh 11. The grouting port 22 is located below the grout outlet 21. Grouting material is injected into the grouting port 22, and the grouting material fills each sleeve 2 through the connecting cavity.

[0055] The temperature control component 5 controls the heating element 3 to heat the sleeve 2 to the preset temperature. After the grout solidifies, the connection between the wall 1 and the floor slab 6 is achieved.

[0056] After connecting the wall 1 and the floor slab 6, the insulation layer 4 is removed.

[0057] Reference Figure 1 The prefabricated wall structure with grouting sleeve connection in low temperature environment, which is made using the above construction method, includes a wall 1, multiple sleeves 2 and a floor slab 6.

[0058] A first steel mesh 11 is arranged inside the wall 1. Multiple hollow sleeves 2, each open at both ends, are spaced apart along the length of the wall 1, with one end inserted into the first steel mesh 11. The ends of the vertical reinforcing bars at the bottom of the first steel mesh 11 are fixedly connected to the sleeves 2. Each sleeve 2 is prefabricated within the wall 1 and has a grout outlet 21 and a grouting inlet 22 communicating with the outside. The other end of each sleeve 2 is also open to the outside. A connecting cavity is formed within the wall 1, communicating with all of the sleeves 2.

[0059] A second steel mesh 61 is installed inside the floor slab 6. The second steel mesh 61 is inserted into the other end of the sleeve 2. Grouting material is injected into the sleeve 2 and the connecting cavity through the grouting port 22. The grouting port 22 is located below the grout outlet 21. After the sleeve 2 is filled with grouting material, the grout flows out from the grout outlet 21. The grouting port 22 and the grout outlet 21 are blocked by a plug. After the grouting material solidifies, the wall 1 and the floor slab 6 are fixedly connected.

[0060] The prefabricated wall structure with grouting sleeve connection in low-temperature environments also includes a flexible heating element 3, an insulation layer 4, and a temperature control component 5. The flexible heating element 3 is sequentially wound around the periphery of multiple sleeves 2 and prefabricated within the wall 1. The end of the heating element 3 extends from the wall 1 and is electrically connected to the temperature control component 5. The heating element 3 is connected to the temperature control component 5, which controls the heating element 3. In this embodiment, the heating element 3 is a heating wire. A sensor, which can be a thermocouple sensor, may be installed inside the sleeve 2. The sensor is connected to the temperature control component 5. The temperature control component 5 includes a control board, which may include a main switch, a main switch indicator light, a heating switch, a heating voltmeter, a voltage adjustment button, a temperature controller, and a temperature control switch. The temperature control component 5 is connected to the heating element 3 and can control and measure the heating temperature and automatically adjust the start and stop of heating.

[0061] The heating wire is electrically connected to the thermocouple and temperature control component 5 for heating. The thermocouple sensor is connected to the temperature control component 5 via a circuit. Thermocouple sensors are commonly used temperature-sensing elements in temperature measuring instruments; they sense temperature and convert it into a usable output signal. When the power is turned on, the heating wire begins to generate heat. Once the desired temperature is reached, the presence of the thermocouple sensor maintains a constant temperature inside the sleeve 2. The temperature control component 5 works by controlling the heating voltage adjustment switch to achieve the desired temperature. During the experiment, turning on the main switch illuminates the relevant indicator lights. Turning on the temperature control switch and adjusting to the desired temperature displays the current and final temperatures on the temperature controller and outputs temperature data. The heating wire around the sleeve 2 slowly heats it. Once the desired temperature is reached, the thermocouple sensor automatically senses and transmits the signal to the temperature controller. The temperature control switch then immediately stops the heating wire, stabilizing the temperature at the desired level. This is existing technology; the specific structure is not detailed here, but can be referenced in examples such as heating kettles with temperature control functions.

[0062] In this embodiment, the wall 1 is connected to the floor slab 6, and the floor slab 6 is located below the wall 1. Of course, the wall 1 can also be connected to the floor slab, and the floor slab can be located on the side of the wall 1. In this case, the sleeve 2 can be located on the side of the wall 1.

[0063] The insulation layer 4 is attached to the outer surface of the wall 1 at the location corresponding to the sleeve 2. In this embodiment, the floor slab 6 is located below the wall 1, and the sleeve 2 is located at the bottom of the wall 1, so the insulation layer 4 only needs to be attached to the bottom of the wall 1. The presence of the insulation layer 4 reduces heat loss and improves heating efficiency, allowing the built-in heating element 3 to transfer heat to the grout more quickly, accelerating the solidification process. The insulation layer 4 effectively isolates the grout from the influence of low external temperatures on the solidification process of the grout, maintaining the temperature required for the grout to solidify and harden, ensuring that the grout can work normally even in low-temperature environments. In this embodiment, the insulation layer 4 is detachably attached to the outer surface of the wall 1, and the insulation layer 4 is recyclable, reducing production costs.

[0064] When connecting wall 1 to floor slab 6, the reinforcing bars of floor slab 6 are inserted into sleeve 2, and grout is injected into sleeve 2. The built-in heating element 3 heats both the concrete of the wall and the grout in the sleeve, actively regulating the temperature of the grout in sleeve 2. The insulation layer slows down heat loss, ensuring that the grout solidifies and hardens at a suitable temperature even in low-temperature environments, thereby improving the strength and durability of the grout and ensuring a firm connection between prefabricated walls. The prefabricated heating element 3 and insulation layer 4 enable precise control of the grout solidification process, accelerating construction speed and improving efficiency. They also allow for construction in a wider range of climatic conditions, expanding the application scope of prefabricated buildings.

[0065] Furthermore, referring to Figure 3 The inner wall of the sleeve 2 is provided with multiple protrusions 23 at intervals, which can increase the contact area between the sleeve 2 and the grout inside the sleeve 2, improve heat transfer efficiency, promote a more uniform distribution of heat generated by the heating element 3 into the grout, and accelerate heat conduction, so that the grout can reach the required solidification temperature more quickly after injection. In addition, the presence of protrusions 23 also enhances the mechanical interlocking between the sleeve 2 and the grout, improving the stability of the connection.

[0066] In an optional embodiment, refer to Figure 4 The inner and outer walls of the sleeve 2 are provided with multiple spaced through grooves 24 along the circumference, which can increase the effective bonding area and gripping force between the sleeve 2 and the grouting material, and the reinforcing bars of the first steel mesh 11 and the second steel mesh 61 will not be obstructed when passing through the sleeve 2.

[0067] Reference Figure 3 The outer wall of the sleeve 2 is provided with multiple protrusions 23 at intervals, which can increase the contact area between the sleeve 2 and the wall 1, improve heat transfer efficiency, and help accelerate the solidification process of the grout in low-temperature environments. Secondly, the presence of protrusions 23 enhances the mechanical interlocking between the sleeve 2 and the wall 1, improving the overall stability and connection strength of the structure. In addition, the protrusions 23 may also serve as stress concentration points, helping to disperse and absorb internal stress caused by thermal expansion or contraction, reducing crack formation, and improving the durability of the wall.

[0068] The heating element 3 is wound around the sleeve 2 and secured between adjacent protrusions 23. This serves to limit the position of the heating element 3, ensuring that it will not shift due to the flow of grout or construction operations during the pouring of the wall 1, thus guaranteeing the uniformity and reliability of the heating effect. The securing of the heating element 3 between the protrusions 23 also helps protect it from damage during construction, extending its service life. Simultaneously, it increases the contact area between the heating element 3 and the sleeve 2, improving the heat transfer efficiency between them, allowing heat to be transferred more effectively to the grout and accelerating its solidification process.

[0069] Multiple sleeves 2 are arranged in two rows with an alternating pattern, and the heating wires are arranged in a wavy pattern, making the heating elements more evenly distributed throughout the wall. The wavy heating wires further increase the surface area in contact with the grout, thus achieving more balanced heat transfer along the width of the wall. The alternating arrangement of the sleeves 2 reduces dead zones in the heat transfer process, ensuring that all parts of the wall receive a suitable temperature, and accelerating the solidification and hardening process of the grout. At the same time, it reduces the problem of local overheating or uneven hardening caused by concentrated heat, improving the construction quality and structural stability of the wall.

[0070] In one embodiment, the two ends of the heating wire are located outside the wall 1, and the middle is folded to form two heating sections 31. The two heating sections 31 are wound around the sleeve 2 at intervals, which can ensure the electrical connection between the heating element 3 and the temperature control component 5, so that the two electrical connection points are located on the same side of the wall 1, reducing the length of the external wire and making it easier for construction personnel to operate; at the same time, it increases the contact area between the heating element 3 and the sleeve 2, and improves the heat transfer efficiency.

[0071] The connection point of the two heating sections 31 is fixed on the sleeve 2 at the very end. After the heating wire is wound around the sleeve 2 at the very end, it is wound around the sleeve 2 from the farthest side of the adjacent staggered sleeves 2. Both heating sections 31 are located in the middle of the sleeve 2.

[0072] In another embodiment, the heating element 3 is fixed in the middle of the end sleeve 2 and wrapped around it once, providing a stable starting point for the heating wire and enhancing the stability of the heating element 3 fixed to the sleeve 2. Secondly, wrapping the heating wire around the end sleeve 2 helps to concentrate heat, providing an initial heating area for the grout, thereby accelerating the start of the solidification process. Wrapping the heating wire from the side furthest from the adjacent sleeve 2 ensures that after wrapping once on the sleeve 2, the heating element 3 can continue to wrap around to the adjacent sleeve 2, ensuring uniform heat distribution between the sleeves and avoiding localized overheating or uneven heating. The two heating sections 31 are located in the middle of the sleeve 2 and can be wrapped around simultaneously, simplifying the installation of the heating element 3 and making the heating of the entire wall more uniform, which helps to improve the overall solidification quality of the grout and the uniformity of the structure.

[0073] After the two heating sections 31 are connected, they are wound around the sleeve 2 at the very end. Then, the two heating sections 31 are wound around the far side of the adjacent staggered sleeve 2 in turn. One heating section 31 is located in the upper middle part of the sleeve 2, and the other heating section 31 is located in the lower middle part of the sleeve 2.

[0074] By wrapping the heating wire around the end sleeve 2 once, a stable starting point is provided, helping to ensure the stability and uniform distribution of the heating wire throughout the wall. Secondly, the two heating sections 31, located at different heights in the sleeve 2, achieve layered heating in the vertical direction. This helps to heat the grouting material more evenly throughout the sleeve 2, avoiding localized overheating or uneven solidification caused by concentrated heat. Furthermore, this layered heating method can more effectively promote the evaporation of moisture inside the grouting material, reducing internal stress caused by temperature gradients and thus lowering the risk of cracking. Simultaneously, it improves heating efficiency because heat can be transferred more directly to different parts of the grouting material, reducing heat loss during the transfer process.

[0075] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0076] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0077] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A construction method of a fabricated wall structure of a grout sleeve connection in a low temperature environment, characterized by, The method comprises the following steps: providing a first reinforcing mesh (11) and a plurality of sleeves (2), the sleeves (2) being hollow and open at both ends, the sleeves (2) being provided with grout outlets (21) and grouting outlets (22), a plurality of the sleeves (2) being inserted in the length direction of the first reinforcing mesh (11) at the vertical reinforcing end of the first reinforcing mesh (11) at intervals; providing a flexible heating element (3), the heating element (3) being wound around the periphery of the plurality of sleeves (2) in sequence; pouring grouting material into the first reinforcing mesh (11) to form a prefabricated wall body (1), so that the plurality of sleeves (2) and the heating element (3) are prefabricated in the wall body (1), a communication cavity in communication with the plurality of sleeves (2) being formed in the wall body (1), and the end of the heating element (3) extending out of the wall body (1) and being electrically connected with a temperature control assembly (5); the grout outlet (21), the grouting outlet (22) and the end of the sleeve (2) away from the first reinforcing mesh (11) are all in communication with the outside; providing a floor (6), the floor (6) being prefabricated with a second reinforcing mesh (61), the vertical reinforcing mesh of the second reinforcing mesh (61) being inserted into the end of the sleeve (2) away from the first reinforcing mesh (11), the grouting outlet (22) being located below the grout outlet (21), grouting material being injected into the grouting outlet (22), and the grouting material filling each of the sleeves (2) through the communication cavity; controlling the heating element (3) to heat the sleeve (2) to a preset temperature by using the temperature control assembly (5), and connecting the wall body (1) and the floor (6) after the grouting material solidifies; a plurality of through grooves (24) are formed in the inner wall of the sleeve (2) in the circumferential direction; a plurality of protrusions (23) are arranged at intervals on the outer side wall of the sleeve (2); and the heating element (3) is wound outside the sleeve (2) and clamped between adjacent protrusions (23).

2. The method of constructing a panelized wall structure with grout sleeve connections in a cryogenic environment of claim 1, wherein, After the wall body (1) is formed, a thermal insulation layer (4) is detachably connected to the outer surface of the wall body (1) corresponding to the sleeve (2).

3. The method of constructing a panelized wall structure with grout sleeve connections in a cryogenic environment of claim 2, wherein, After the wall body (1) and the floor (6) are connected, the thermal insulation layer (4) is detached.

4. The method of constructing a panelized wall structure with grout sleeve connections in a cryogenic environment of claim 1, wherein, The plurality of sleeves (2) are arranged in two rows and staggered, and the heating element (3) is arranged in a wave shape.

5. The method of constructing a panelized wall structure with grout sleeve connections in a cryogenic environment of claim 4, wherein, The heating element (3) is an electric heating wire, both ends of the electric heating wire are located outside the wall body (1), the middle part is folded to form two heating sections (31), and the two heating sections (31) are arranged at intervals on the sleeve (2).

6. The method of constructing a panelized wall structure with grout sleeve connections in a cryogenic environment of claim 5, wherein, After the part where the two heating sections (31) are connected is wound around one sleeve (2) at the most end, the two heating sections (31) are sequentially wound around the farther side of the adjacent and staggered sleeves (2), and one of the heating sections (31) is located in the upper part of the sleeve (2), and the other heating section (31) is located in the lower part of the sleeve (2).

7. A fabricated wall structure with grout sleeve connections in a low temperature environment, characterized by Formed based on the construction method as claimed in any one of claims 1 to 6, comprising: a wall body (1) in which a first steel bar net (11) is arranged; a plurality of sleeves (2) which are hollow and open at both ends, the plurality of sleeves (2) are spaced along the length direction of the wall body (1) and one end is inserted on the first steel bar net (11); the plurality of sleeves (2) are precast in the wall body (1) and are provided with a grout outlet (21) and a grouting port (22) which are in communication with the outside, and the other end of the sleeve (2) is in communication with the outside; a communication cavity which is in communication with the plurality of sleeves (2) is formed in the wall body (1); a flexible heating element (3) is sequentially arranged around the plurality of sleeves (2) and is precast in the wall body (1), and the end of the heating element (3) extends out of the wall body (1) and is electrically connected with a temperature control assembly (5); a floor slab (6) in which a second steel bar net (61) is arranged, the second steel bar net (61) is inserted into the other end of the sleeve (2), and the sleeve (2) and the communication cavity are both filled with grouting material to connect the wall body (1) and the floor slab (6).

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