Anti-sedimentation limiting device for bottom of enclosure

Abstract

The invention relates to the technical field of foundation pit engineering enclosure structure construction, in particular to an enclosure bottom anti-sedimentation limiting device, an inner cavity of a limiting bearing plate is provided with an anti-sedimentation assembly, the anti-sedimentation assembly comprises a positive and negative screw rod, the positive and negative screw rod is located in the inner cavity of the limiting bearing plate, and the surface of the positive and negative screw rod is fixedly sleeved with a rotating disc; an operation notch facilitating operation is formed in the top of the limiting pressure-bearing plate, threaded sleeves are arranged on the positive and negative threaded surfaces of the positive and negative threaded rod in a threaded and sleeving mode, push plates are fixedly arranged on the surfaces of the threaded sleeves in a sleeving mode, guide blocks are arranged at the two ends of the top of each push plate, guide grooves matched with the guide blocks are formed in the two ends of the top of an inner cavity of the limiting pressure-bearing plate, and positioning rods are arranged on the outer sides of the push plates. The push plate is driven by the positive and negative screws to drive the positioning rod to perform bidirectional displacement adjustment, multi-point active limiting of the bottom of the enclosure structure is achieved, differential settlement and horizontal displacement are effectively controlled, and the device has the advantages of being capable of being actively adjusted, convenient to install and high in adaptability.

Description

Technical Field

[0001] This invention relates to the field of construction technology for retaining structures in foundation pit engineering, specifically to a bottom anti-settlement limiting device for retaining structures. Background Technology

[0002] In the construction of deep foundation pits, the bottom stability of the retaining structure is a key factor in ensuring the safety of the entire pit. Due to complex geological conditions, the effect of confined water head, and the unloading effect during excavation, uneven settlement, horizontal slippage, or "kick-out" deformation often occur at the bottom of the retaining structure. These deformations not only directly affect the structural integrity of the foundation pit itself but may also trigger ground settlement outside the pit through soil stress transfer, causing cascading damage to surrounding buildings, underground pipelines, roads, and other infrastructure. These problems are particularly prominent in soft soil foundations or high-water-level areas.

[0003] Currently, three main approaches are used in engineering practice to address this problem: first, increasing the insertion depth of the retaining structure to improve stability, but this significantly increases material costs and construction difficulty; second, reinforcing the bottom of the pit, such as using jet grouting piles or soil mixing piles, but these methods have long construction cycles and are heavily restricted by site conditions; and third, using passive support measures such as anti-uplift piles, but these have drawbacks such as high project costs and strict requirements for construction precision. These traditional solutions generally suffer from low construction efficiency, poor economy, and insufficient adaptability, making it difficult to meet the dual demands of modern foundation pit engineering for both ease of construction and reliability. Therefore, developing a retaining bottom limiting device that is actively adjustable, easy to install, and highly adaptable has become an urgent technical challenge to be solved in the field of foundation pit engineering.

[0004] To address the aforementioned issues, existing technologies urgently need improvement. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a bottom anti-settlement limiting device for enclosures, which has the advantages of being actively adjustable, easy to install, and highly adaptable.

[0006] This application provides a bottom anti-settlement limiting device for enclosures, the technical solution of which is as follows: The inner cavity of the limiting pressure plate is equipped with an anti-settlement component, which includes positive and negative screws located in the inner cavity of the limiting pressure plate. A turntable is fixedly sleeved on the surface of the positive and negative screws. An operation notch for easy operation is opened at the top of the limiting pressure plate. Screw sleeves are threaded on both the positive and negative threaded surfaces of the positive and negative screws. A push plate is fixedly sleeved on the surface of the screw sleeves. Guide blocks are provided at both ends of the top of the push plate. Guide grooves that match the guide blocks are opened at both ends of the top of the inner cavity of the limiting pressure plate. A positioning rod is provided on the outer side of the push plate, and one end of the positioning rod passes through and extends to the outer side of the limiting pressure plate. The surface of the positioning rod is movably connected to the inner cavity of the limiting pressure plate.

[0007] Furthermore, this application also proposes that the surface of the turntable is provided with anti-slip threads, and the number of anti-slip threads is not less than fifteen.

[0008] Furthermore, this application also proposes that the outer side of the push plate is fixedly connected to the positioning rod by a connecting block, and that the number of positioning rods on the outer side of the push plate is not less than eight.

[0009] Furthermore, this application also proposes that the two ends of the push plate top are fixedly connected to the guide block by welding, and the surface of the guide block is in close contact with the inner cavity of the guide groove.

[0010] Furthermore, this application also proposes that each of the four corners of the bottom of the limiting pressure plate is fixedly connected with a threaded sleeve, and the inner cavity of the threaded sleeve is threadedly connected with a screw rod, and the bottom of the screw rod is fixedly connected with a cone head.

[0011] Furthermore, this application also proposes that the operating notch is located at the center of the top of the limiting pressure plate, and the length of the operating notch is greater than the length of the turntable.

[0012] Furthermore, this application also proposes that the front and rear sides of the top of the limiting pressure plate are fixedly connected with a sleeve, the inner surface of the sleeve is slidably connected with a plate, and the left and right ends of the inner surface of the plate are provided with reserved holes.

[0013] Furthermore, this application also proposes that an anchor rod is inserted into the inner surface of the reserved hole, and the sleeve and the plate are connected by bolts.

[0014] As can be seen from the above, the anti-settlement limiting device and its anti-settlement components at the bottom of the enclosure provided in this application use positive and negative screws to drive the push plate to drive the positioning rod for bidirectional displacement adjustment, thereby realizing active limiting at multiple points at the bottom of the enclosure structure, effectively controlling uneven settlement and horizontal displacement. It has the advantages of being actively adjustable, easy to install and highly adaptable. Adjust the position of the clamping plate in the clamping sleeve, then tighten the bolts, and finally insert the anchor rod through the reserved hole and into the ground, thereby further improving the overall stability of the device. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a bottom view of the limiting pressure plate structure of the present invention; Figure 3 This is a schematic diagram of the anti-settlement component structure of the present invention.

[0016] In the diagram: 1. Limiting pressure plate; 2. Operating notch; 3. Screw sleeve; 4. Screw; 5. Cone head; 6. Anti-settlement component; 601. Positive and negative screws; 602. Guide block; 603. Turntable; 604. Connecting block; 605. Positioning rod; 606. Threaded sleeve; 607. Push plate; 7. Guide groove; 8. Compression sleeve; 9. Clamping plate; 10. Anchor bolt; 11. Bolt; 12. Reserved hole. Detailed Implementation

[0017] The following drawings disclose several embodiments of the present invention. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details are not intended to limit the invention. That is, in some embodiments of the invention, these practical details are not essential. Furthermore, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0018] Please see Figure 1-3 In existing technologies, stability control of the bottom of the retaining structure in deep foundation pit engineering often relies on increasing the insertion depth or reinforcing the pit bottom. These traditional methods suffer from long construction cycles and high costs, and are particularly difficult to implement quickly in soft soil strata due to soil deformation. During the construction of a subway station's deep foundation pit, uneven settlement occurred at the bottom of the retaining piles, causing displacement of adjacent pipelines. Conventional reinforcement schemes are limited by site space and cannot be implemented in confined working areas, revealing the insufficient adaptability of traditional technologies to complex working conditions.

[0019] To address the aforementioned issues, engineers observed that the displacement of the retaining structure primarily occurred at the bottom contact surface, necessitating an adjustable mechanical limiting device. Analysis of the interaction mechanism between the soil and the structure revealed that bidirectional synchronous pressure application could effectively balance lateral earth pressure. Based on the mechanical principle of threaded transmission, an adjustable-depth positioning mechanism was designed, utilizing symmetrical thrust to achieve structural self-stabilization.

[0020] Therefore, this application proposes a device including a limiting pressure plate 1, the inner cavity of which is provided with an anti-settlement component 6. This component includes a screw 4 with positive and negative threads, a rotating disk 603 fixed to the surface of the screw 4, and an operating notch 2 at the top. Each of the positive and negative threaded surfaces is provided with a threaded sleeve 606, which fixes a push plate 607. Guide blocks 602 are provided at both ends of the top of the push plate 607 to cooperate with guide grooves 7. A positioning rod 605 is provided on the outer side of the push plate 607, penetrating the limiting pressure plate 1, and the positioning rod 605 is movably connected to the inner cavity.

[0021] Among them, the forward and reverse screw 601 refers to a drive shaft with bidirectional threads, which can be implemented using a trapezoidal thread structure to generate bidirectional displacement through rotation. The turntable 603 refers to an operating disc mounted on the surface of the screw 4, which can be implemented using a cast iron disc with anti-slip texture to facilitate the application of rotational torque. The operating notch 2 refers to the opening at the top of the limiting pressure plate 1, which can be implemented using a rectangular cut structure to allow tools to reach into the operating turntable 603. The threaded sleeve refers to a sliding component with internal threads, which can be implemented using a copper alloy bushing to convert the rotation of the screw 4 into linear motion. The guide block 602 and guide groove 7 refer to mutually cooperating guiding structures, which can be implemented using a dovetail groove and a slider to constrain the movement trajectory of the push plate 607. The positioning rod 605 refers to a bearing component inserted into the soil, which can be implemented using a steel rod with a pointed tip to provide pull-out resistance through friction with the soil layer.

[0022] Specifically, when the rotating turntable 603 drives the forward and reverse screws 601, the two side sleeves move in opposite directions, causing the push plate 607 to expand outward synchronously. The guide block 602 slides along the guide groove 7 to ensure the linear movement of the push plate 607 and avoid deflection and jamming. The push plate 607 pushes the positioning rod 605 outward to insert into the surrounding soil to form multi-point anchoring. The operating notch 2 provides sufficient space for tools such as wrenches to operate the turntable 603 to achieve precise adjustment. The frictional resistance between the positioning rod 605 and the soil forms an anti-pull-out system, limiting the sinking of the limiting bearing plate 1. The structure of the guide groove 7 and the guide block 602 ensures uniform distribution of thrust and prevents local stress concentration.

[0023] Compared to existing technologies, traditional pit bottom reinforcement requires large-scale construction and cannot be adjusted, while this solution achieves instant response through mechanical adjustment. Existing anti-uplift piles are fixed structures, while this device can dynamically adjust the depth of the positioning rod 605 according to the settlement. Conventional limiting devices lack guiding mechanisms and are prone to deflection; this design ensures vertical force application through the constraint of the guide groove 7 and guide block 602.

[0024] Through the above technical solutions, this application achieves bidirectional synchronous limiting at the bottom of the retaining structure, effectively dispersing soil pressure. The mechanical transmission structure allows for quantifiable adjustment of settlement control, adapting to different geological conditions. The guiding mechanism ensures the stability of the device's operation and avoids structural damage caused by eccentric loading. The multi-point anchoring system significantly improves pull-out resistance and prevents the retaining structure from undergoing kick-out deformation.

[0025] This application further proposes that the surface of the turntable 603 is provided with anti-slip threads, and the number of anti-slip threads is not less than fifteen.

[0026] The anti-slip threads refer to the continuous raised and recessed textures formed on the outer circumferential surface of the turntable 603. Specifically, these can be formed on the surface of the metal turntable 603 using rolling or cutting processes, with the texture depth controlled within the range of 0.5-1.2 mm. This texture increases the coefficient of friction on the contact surface, preventing slippage during manual operation.

[0027] The requirement of at least fifteen anti-slip threads refers to independent thread segments evenly distributed along the circumference of the turntable 603. These can be achieved by equidistant arrangement, with a spacing of 20-24 mm between adjacent thread segments. This number ensures that the contact area between the palm and the turntable 603 during operation covers at least three thread segments, providing multi-point support.

[0028] Specifically, the anti-slip threads are machined with a V-shaped cross-section, with a top width of 2-3 mm and a bottom width of 4-5 mm. When the operator holds the turntable 603 and rotates it through the operating notch 2, a micro-engaging effect is created between the palm and the thread. The design with no fewer than fifteen threads ensures that a new thread segment enters the stress area every 24 degrees of rotation of the turntable 603, thus maintaining a uniform distribution of friction during continuous rotation. In soft soil foundation construction scenarios, this structure effectively counteracts the decrease in grip strength caused by hand sweat or mud.

[0029] Compared to existing technologies, the turntable 603 of traditional enclosure structure limiting devices typically employs a smooth surface or simple groove anti-slip design, which is prone to slippage in humid environments. This solution, through a specific number and shape of anti-slip threads, enables the turntable 603 to provide stable torque transmission even under conditions of silt or groundwater immersion, avoiding limit adjustment failure due to slippage.

[0030] Through the above technical solution, this application solves the problem of control failure caused by insufficient friction when manually adjusting the turntable 603, ensuring accurate adjustment of the bottom limit device of the retaining structure under complex geological conditions, while reducing the physical exertion of operators. The dense arrangement of anti-slip threads further avoids the risk of structural failure caused by local wear, extending the service life of the device.

[0031] This application further proposes that the connection between the outer side of the push plate 607 and the positioning rod 605 is fixedly connected by a connecting block 604, and the number of positioning rods 605 on the outer side of the push plate 607 is not less than eight.

[0032] The connecting block 604 is a metal component used to achieve a rigid connection between the push plate 607 and the positioning rod 605. This connection can be achieved through welding or bolt fastening, and its function is to enhance the load transfer efficiency between the push plate 607 and the positioning rod 605. The positioning rod 605 is a rod-shaped structure that is vertically inserted into the soil to provide lateral restraint. It can be implemented using a steel rod with threaded ends, and its function is to distribute the soil pressure borne at the bottom of the retaining structure through multi-point anchoring.

[0033] Specifically, the push plate 607 and the positioning rods 605 are rigidly connected by the connecting block 604, ensuring that the horizontal thrust generated by the push plate 607 under the drive of the positive and negative screws 601 is evenly transmitted to each positioning rod 605. When the number of positioning rods 605 on the outside of the push plate 607 reaches eight or more, the multiple positioning rods 605 form a distributed anchoring system in the soil, thereby generating a continuous constraint band at the bottom of the retaining structure and effectively suppressing lateral deformation of the soil. The cooperation between the guide block 602 and the guide groove 7 ensures that the push plate 607 moves along a predetermined trajectory, avoiding uneven force on the positioning rods 605 due to deflection.

[0034] Compared with existing technologies, traditional enclosure structure bottom reinforcement devices typically employ single-point anchoring or localized reinforcement methods. These devices often have a limited number of positioning rods 605, and the connections are mostly direct welding, which can easily lead to weld cracking due to stress concentration. This solution uses a connecting block 604 to achieve modular assembly of the push plate 607 and the positioning rods 605. Simultaneously, increasing the number of positioning rods 605 creates planar constraints, significantly improving the overall deformation resistance of the device.

[0035] Through the above technical solution, this application can achieve multi-point synchronous anchoring at the bottom of the retaining structure, avoid settlement problems caused by excessive local soil stress, reduce the risk of connection node failure, and ensure the long-term stability of the device under complex geological conditions.

[0036] This application further proposes that the two ends of the top of the push plate 607 are fixedly connected to the guide block 602 by welding, and the surface of the guide block 602 is in close contact with the inner cavity of the guide groove 7.

[0037] Among them, the fixed connection by welding refers to the permanent connection between the push plate 607 and the guide block 602 by filling the joint with molten metal. Specifically, it can be achieved by electric arc welding or gas shielded welding process to ensure that the connection part will not undergo relative displacement when subjected to force.

[0038] The close contact between the surface of the guide block 602 and the inner cavity of the guide groove 7 is to control the gap between the outer contour of the guide block 602 and the inner wall of the guide groove 7 within a small range. Specifically, the fit tolerance between the guide block 602 and the guide groove 7 can be ensured through machining, so that the guide block 602 can move smoothly when sliding in the guide groove 7, and avoids skewing or jamming caused by excessive gap.

[0039] Specifically, the two ends of the top of the push plate 607 are rigidly connected to the guide block 602 by welding. The welding area covers the contact surface between the push plate 607 and the guide block 602, ensuring that the guide block 602 does not separate from the push plate 607 when subjected to lateral loads. After the guide block 602 is embedded in the guide groove 7, its surface forms a surface contact with the inner wall of the guide groove 7. When the push plate 607 moves horizontally driven by the positive and negative screws 601, the guide block 602 slides along the extension direction of the guide groove 7. The close contact restricts the displacement of the push plate 607 in the vertical direction, thereby maintaining the stability of the push plate 607's movement trajectory.

[0040] Compared with existing technologies, traditional enclosure limiting devices often use bolted connections or snap-fit ​​assemblies for their guide structures. These connections are prone to loosening due to vibration or load impact, leading to a decrease in guide accuracy. Welding eliminates the risk of loosening of the connectors. Combined with the precision machining of the guide block 602 and guide groove 7, the stability of the guide structure can be maintained over a long period, preventing device failure caused by component misalignment.

[0041] Through the above technical solution, this application solves the problems of easy loosening of the guide structure and unstable movement trajectory in traditional limiting devices. Through the dual design of welding fixation and precision matching, it ensures that the push plate 607 always moves along the predetermined path during repeated extension and retraction, thereby improving the reliability of the bottom limiting of the enclosure structure and reducing the maintenance needs caused by device deformation during construction.

[0042] This application further proposes that each of the four corners of the bottom of the limiting pressure plate 1 is fixedly connected with a threaded sleeve 3, and the inner cavity of the threaded sleeve 3 is threadedly connected with a screw 4, and the bottom of the screw 4 is fixedly connected with a cone head 5.

[0043] The threaded sleeve 3 refers to a tubular structure with internal threads, specifically a steel sleeve welded to the four corners of the bottom of the limiting pressure plate 1, providing a vertical adjustment channel for the screw 4. The screw 4 refers to a rod-shaped component with external threads, specifically made of high-strength alloy steel. Its length is adjusted by screwing it into the threaded sleeve 3, thereby controlling the depth of the cone 5 inserted into the soil. The cone 5 refers to a pointed structure, specifically a conical steel component welded to the end of the screw 4, used to penetrate the soil and form an anchoring point.

[0044] Specifically, during installation at the bottom of the foundation pit, four threaded sleeves 3 are fixed at the four corners of the limiting bearing plate 1. The operator rotates the screw 4 to move it up and down along the internal thread of the threaded sleeve 3. When the screw 4 is screwed downwards, the cone head 5 is pressed into the soil layer at the bottom of the foundation pit, forming a multi-point anchoring structure. The screw 4, which can be adjusted synchronously at the four corners, can adapt to the bearing capacity requirements of different geological conditions. When the cone head 5 penetrates the soft soil layer and contacts the hard bearing layer, it can effectively disperse the load transmitted by the retaining structure.

[0045] Compared to existing technologies, traditional pit bottom reinforcement requires large-scale construction of cement mixing piles or jet grouting piles, which not only damages the original soil but also makes it impossible to adjust the anchoring depth. This solution, through the combination of adjustable screw 4 and cone head 5, can maintain the integrity of the soil while precisely controlling the anchoring depth according to the actual geological conditions, avoiding material waste caused by excessive construction.

[0046] Through the above technical solution, this application achieves synchronous anchoring at the four corners of the bottom of the retaining structure. After the cone head 5 penetrates the soft soil layer, it forms a stable support point, effectively preventing settlement and deformation of the retaining structure due to insufficient local bearing capacity. The adjustable length of the screw 4 allows the device to adapt to the distribution of bearing layers at different depths, and can still establish a reliable anchoring system in strata with alternating soft and hard surfaces.

[0047] This application further proposes that the operating notch 2 is opened at the center of the top of the limiting pressure plate 1, and the length of the operating notch 2 is greater than the length of the turntable 603.

[0048] Among them, the operating notch 2 refers to the through structure opened at the top of the limiting pressure plate 1, which can be realized by a rectangular or U-shaped slot. Its center position is designed to facilitate the vertical insertion of the operating tool into the device and direct contact with the turntable 603 for rotation control.

[0049] Among them, the turntable 603 refers to the disc-shaped component that is fixedly connected to the positive and negative screws 601. Specifically, it can be made of metal casting or machined. The anti-slip texture on its surface can enhance the friction when rotating manually. The positive and negative screws 601 drive the push plates 607 on both sides to move synchronously in opposite directions.

[0050] Specifically, when the operating notch 2 is located in the center area of ​​the top of the limiting pressure plate 1, the operator can directly observe the position of the turntable 603 through the notch and apply rotational torque to the turntable 603 by vertically inserting tools such as wrenches into the notch. The design of the operating notch 2 being longer than the diameter of the turntable 603 ensures that the turntable 603 will not interfere with the edge of the notch during rotation, ensuring that the turntable 603 can complete a full 360-degree rotation. When the turntable 603 drives the positive and negative screws 601 to rotate, the push plates 607 on both sides achieve linear movement under the constraint of the guide groove 7 and the guide block 602, thereby driving the positioning rod 605 to extend outward, forming multi-point limiting support for the bottom of the enclosure structure.

[0051] Compared with existing technologies, the operating port of traditional limiting devices is usually off-center or insufficient in size, resulting in limited tool operating space and the rotation angle of turntable 603 being blocked by the edge of the notch. This solution, through the design of a centrally symmetrical operating notch 2, enables the operating tool to be precisely aligned with turntable 603 along the vertical axis, avoiding the problem of screw 4 jamming due to eccentric operation; at the same time, the matching relationship between the notch length and the size of turntable 603 eliminates the risk of mechanical interference during rotation.

[0052] Through the above technical solution, this application achieves spatial optimization of the rotation operation of turntable 603, enabling construction personnel to quickly complete the adjustment of the limit device in a narrow foundation pit working environment, solving the problem of low adjustment efficiency caused by the inconvenience of traditional devices, and reducing the risk of device damage caused by operational errors.

[0053] The front and rear sides of the top of the limiting pressure plate 1 are fixedly connected with a sleeve 8, and the inner surface of the sleeve 8 is slidably connected with a plate 9, and the left and right ends of the inner surface of the plate 9 are provided with reserved holes 12.

[0054] An anchor rod 10 is inserted into the inner surface of the reserved hole 12, and the sleeve 8 and the plate 9 are connected by bolts 11.

[0055] Compared with the existing technology, adjusting the position of the adjusting plate 9 in the sleeve 8, then tightening the bolt 11, and finally inserting the anchor rod 10 through the reserved hole 12 into the ground can further improve the overall stability of the device.

[0056] 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 bottom anti-settlement limiting device for enclosures, comprising a limiting pressure plate (1), characterized in that: The inner cavity of the limiting pressure plate (1) is provided with an anti-settlement component (6). The anti-settlement component (6) includes a positive and negative screw (601), and the positive and negative screw (601) is located in the inner cavity of the limiting pressure plate (1). A turntable (603) is fixedly sleeved on the surface of the positive and negative screw (601). An operation notch (2) for easy operation is opened on the top of the limiting pressure plate (1). The positive and negative thread surfaces of the positive and negative screw (601) are both threaded with threaded sleeves (606). A push plate (607) is fixedly sleeved on the surface. Both ends of the top of the push plate (607) are provided with guide blocks (602). Both ends of the top of the inner cavity of the limiting pressure plate (1) are provided with guide grooves (7) that are adapted to the guide blocks (602). A positioning rod (605) is provided on the outer side of the push plate (607), and one end of the positioning rod (605) passes through and extends to the outer side of the limiting pressure plate (1). The surface of the positioning rod (605) is movably connected to the inner cavity of the limiting pressure plate (1).

2. The bottom anti-settlement limiting device for enclosures according to claim 1, characterized in that: The surface of the turntable (603) is provided with anti-slip threads, and the number of anti-slip threads is not less than fifteen.

3. The bottom anti-settlement limiting device for enclosures according to claim 1, characterized in that: The outer side of the push plate (607) is fixedly connected to the positioning rod (605) by a connecting block (604), and the number of positioning rods (605) on the outer side of the push plate (607) is not less than eight.

4. The bottom anti-settlement limiting device of the enclosure according to claim 1, characterized in that: The top two ends of the push plate (607) are fixedly connected to the guide block (602) by welding, and the surface of the guide block (602) is in close contact with the inner cavity of the guide groove (7).

5. The bottom anti-settlement limiting device of the enclosure according to claim 1, characterized in that: The four corners of the bottom of the limiting pressure plate (1) are fixedly connected with screw sleeves (3), and the inner cavity of the screw sleeves (3) is threaded with screw rods (4), and the bottom of the screw rods (4) is fixedly connected with cone heads (5).

6. The bottom anti-settlement limiting device of the enclosure according to claim 1, characterized in that: The operating notch (2) is located at the center of the top of the limiting pressure plate (1), and the length of the operating notch (2) is greater than the length of the turntable (603).

7. The bottom anti-settlement limiting device of the enclosure according to claim 1, characterized in that: The front and rear sides of the top of the limiting pressure plate (1) are fixedly connected with a sleeve (8), and the inner surface of the sleeve (8) is slidably connected with a plate (9), and the left and right ends of the inner surface of the plate (9) are provided with reserved holes (12).

8. The bottom anti-settlement limiting device of the enclosure according to claim 7, characterized in that: An anchor rod (10) is inserted into the inner surface of the reserved hole (12), and the sleeve (8) and the plate (9) are connected by bolts (11).

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