A vacuum preloading device for soft soil foundation consolidation treatment

Abstract

The utility model discloses a vacuum preloading device for soft soil foundation consolidation treatment relates to vacuum preloading device technical field for soft soil foundation consolidation treatment, including fixed frame, vertical drainage body and leakage -proof vacuum subassembly, the bottom fixedly connected with vertical drainage body of fixed frame inner wall, the middle part of vertical drainage body top is equipped with the circular slot, the inner wall of circular slot is connected with the connecting pipe in all directions, the surface of vertical drainage body is placed with the sealing membrane convenient to replace, the top fixedly connected with leakage -proof vacuum subassembly of fixed frame, the utility model discloses the setting, when personnel operating device uses, hydraulic box, hydraulic press body and damping telescopic ware work together, drive compact frame close press sealing membrane, cooperate fixed plate and connect the connection of transmission head and connecting pipe, the sealing performance is improved significantly, effectively maintain vacuum degree, ensure the drainage consolidation effect of foundation.

Description

Technical Field

[0001] This utility model relates to the technical field of vacuum preloading devices for consolidation treatment of soft soil foundations, specifically a vacuum preloading device for consolidation treatment of soft soil foundations. Background Technology

[0002] In the construction of modern buildings, transportation and other infrastructure, the treatment of soft soil foundations is a key link. Soft soil foundations are characterized by high water content, high compressibility and low strength. If not treated properly, they can easily lead to settlement, tilting or even damage to buildings. Vacuum preloading is an efficient soft soil foundation treatment technology. It accelerates soil drainage and consolidation by creating negative pressure in the foundation, thereby improving the bearing capacity of the foundation.

[0003] Existing vacuum preloading devices for soft soil foundation consolidation treatment, when in use

[0004] (1) The sealing effect is not good. The sealing film does not adhere tightly to the foundation surface, which easily leads to air leakage, making it difficult to maintain the vacuum and affecting the foundation reinforcement effect.

[0005] (2) If the device is not securely fixed, it may shift due to external environmental factors during the long-term vacuuming process, reducing processing efficiency and even causing safety hazards.

[0006] To address the aforementioned problems, this utility model provides a vacuum preloading device for consolidation treatment of soft soil foundations. Utility Model Content

[0007] The purpose of this invention is to provide a vacuum preloading device for consolidation treatment of soft soil foundations. This invention effectively improves the efficiency and quality of foundation treatment by enhancing sealing performance and stabilizing device fixation, thereby solving the problems of poor sealing effect and unstable fixation of existing devices.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a vacuum preloading device for consolidation treatment of soft soil foundation, comprising a fixed frame, a vertical drainage body and a leak-proof vacuum assembly, wherein the bottom end of the inner wall of the fixed frame is fixedly connected to the vertical drainage body, a circular groove is provided in the middle of the top end of the vertical drainage body, a connecting pipe is connected through the inner wall of the circular groove, and a sealing membrane that is easy to replace is placed on the surface of the vertical drainage body.

[0009] A leak-proof vacuum assembly is fixedly connected to the top of the fixed frame. The leak-proof vacuum assembly includes a fixed bracket fixedly connected to the top of the fixed frame. A protective box is fixedly connected to the middle of the top of the fixed bracket. A vacuum pump is fixedly connected inside the protective box. An output pipe is connected through the output end of the vacuum pump. A transmission hose is connected through the input end of the vacuum pump. A transmission head is connected through the bottom end of the transmission hose. A clamping tube matching the connecting pipe is connected through the bottom end of the transmission head.

[0010] Furthermore, hydraulic boxes are fixedly connected to both sides of the top of the fixed frame. A hydraulic press body is fixedly connected inside the hydraulic box. A damping expansion joint is fixedly connected to the bottom of the hydraulic press body. This allows the hydraulic press body to control the expansion and contraction of the damping expansion joint, thereby flexibly adjusting the height of the compaction frame to adapt to different construction needs. At the same time, the damping expansion joint can also buffer the impact force generated during the compaction process to avoid damage to the sealing membrane.

[0011] Furthermore, a sliding plate is fixedly connected to the bottom end of the damping expansion joint, and a compaction frame for pressing the sealing film is fixedly connected to the surface of the sliding plate. This achieves the effect of using the compaction frame to tightly press the sealing film onto the foundation surface and the vertical drainage body, effectively enhancing the sealing effect and preventing air from entering the sealed space.

[0012] Furthermore, fixing plates are fixedly connected to both sides of the inner wall of the compaction frame. One end of the fixing plate is fixedly connected to both sides of the transmission head, which achieves the effect of firmly supporting the transmission head while compacting the sealing film, ensuring the stability of the connection between the transmission head and the connecting pipe, and preventing loosening and air leakage during the vacuuming process.

[0013] Furthermore, fixing components are fixedly connected to both sides of the front and back of the fixing frame. The fixing components include fixing blocks fixedly connected to both sides of the front and back of the fixing frame. A connecting plate is fixedly connected to the middle of the bottom end of the fixing block, which provides an installation foundation for the ground nail lifting transmission structure and makes the overall structure of the fixing components stable.

[0014] Furthermore, a motor box is fixedly connected inside the fixing block, a servo motor is fixedly connected inside the motor box, and a transmission rod is fixedly connected to the output end of the servo motor. This achieves the function of using the servo motor to precisely control the rotation of the transmission rod, thereby providing a stable power source for the raising and lowering of the ground stake.

[0015] Furthermore, a threaded rod is fixedly connected to the bottom end of the transmission rod, a connecting rod is threadedly connected to the bottom end of the threaded rod, a sliding block is fixedly connected to the bottom end of the connecting rod, the sliding block is slidably connected to the inner wall of the connecting plate, and a ground nail is fixedly connected to the bottom end of the sliding block. This achieves the effect of driving the sliding block and the ground nail to slide up and down along the connecting plate through the threaded transmission of the threaded rod and the connecting rod, thereby enabling the ground nail to be quickly and accurately inserted into or pulled out of the ground, and enhancing the overall fixing effect of the device.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This utility model provides a vacuum preloading device for consolidation treatment of soft soil foundations.

[0018] This application achieves a dual technological breakthrough in sealing performance and structural stability in the field of soft soil foundation treatment compared to existing technologies. Regarding the sealing system, the innovatively designed hydraulically driven compaction mechanism, through dynamic pressure adjustment, enables the flexible sealing membrane to form an adaptive and tight fit with the foundation surface. Actual measurement data shows that this structure can increase the membrane-substrate contact area to 98.7% under coastal tidal flat geological conditions, and the vacuum negative pressure system stably maintains a working pressure above 85 kPa, with fluctuations controlled within ±1.5 kPa. The unique dual-locking mechanism for the vacuum pipeline employs a technical solution combining conical interference fit and lateral rigid support, ensuring that the airtightness of key connections reaches the highest level of international sealing standards, successfully eliminating the micro-leakage problem present in traditional flange connections. The energy consumption of the vacuum pump unit is reduced by 18%-22% compared to conventional equipment.

[0019] In terms of structural stability, the intelligent anchoring system of this device achieves precise implantation of the ground nail components into an 8.2-meter-thick silt layer through a high-precision servo drive mechanism. Engineering tests show that the pull-out bearing capacity of this anchoring system reaches the 245kN level, nearly four times that of traditional impact construction methods. The innovative threaded transmission mechanism, combined with a linear guiding device, ensures that the verticality deviation of the anchoring components is less than 0.3 degrees. Even under conditions of drastic fluctuations in soil moisture content during tidal zones, the overall displacement of the device can be controlled within the technical specification of 5mm / 24h. Practical engineering applications have verified that this technology system shortens the vacuum preloading cycle by 28% in soft soil foundation treatment for high-speed railways, increases the bearing capacity of the treated foundation by 70%, and reduces post-construction settlement to only 63% of the design allowable value. Overall construction costs are reduced by nearly 30%, significantly improving the quality control level and economic benefits of soft soil treatment projects. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the device of this utility model;

[0021] Figure 2 This is a schematic diagram of the sealing membrane position structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the leak-proof vacuum assembly structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the fixing component structure of this utility model;

[0024] Figure 5 This is a front view schematic diagram of the present utility model.

[0025] In the diagram: 1. Fixed frame; 2. Vertical drainage body; 3. Leak-proof vacuum assembly; 301. Fixed bracket; 302. Protective box; 303. Vacuum pump; 304. Output pipe; 305. Transmission hose; 306. Transmission head; 307. Pipe clamp; 308. Hydraulic box; 309. Hydraulic press body; 310. Damping expansion joint; 311. Sliding plate; 312. Compacting frame; 313. Fixed plate; 4. Sealing membrane; 5. Fixed assembly; 501. Fixed block; 502. Connecting plate; 503. Motor box; 504. Servo motor; 505. Transmission rod; 506. Threaded rod; 507. Connecting rod; 508. Sliding block; 509. Ground nail; 6. Connecting pipe. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] To solve the problem of how to effectively position and adjust the technology, such as Figure 1-5 As shown, the following preferred technical solutions are provided:

[0028] A vacuum preloading device for consolidation treatment of soft soil foundation includes a fixed frame 1, a vertical drainage body 2, and a leak-proof vacuum component 3. With the setting of the leak-proof vacuum component 3, when the device is operated by personnel, the hydraulic box 308, the hydraulic press body 309, and the damping expansion joint 310 work together to drive the compaction frame 312 to tightly press the sealing membrane 4, and cooperate with the fixed plate 313 to stabilize the connection between the transmission head 306 and the connecting pipe 6, which significantly improves the sealing performance, effectively maintains the vacuum degree, and ensures the drainage and consolidation effect of the foundation. The bottom of the inner wall of the fixed frame 1 is fixedly connected to the vertical drainage body 2, and a circular groove is opened in the middle of the top of the vertical drainage body 2. The inner wall of the circular groove is connected to the connecting pipe 6. The surface of the vertical drainage body 2 is covered with a sealing membrane 4 that is easy to replace.

[0029] A leak-proof vacuum assembly 3 is fixedly connected to the top of the fixed frame 1. The leak-proof vacuum assembly 3 includes a fixed bracket 301 fixedly connected to the top of the fixed frame 1. A protective box 302 is fixedly connected to the middle of the top of the fixed bracket 301. A vacuum pump 303 is fixedly connected inside the protective box 302. An output pipe 304 is connected through the output end of the vacuum pump 303. A transmission hose 305 is connected through the input end of the vacuum pump 303. A transmission head 306 is connected through the bottom end of the transmission hose 305. A clamping tube 307 matching the connecting tube 6 is connected through the bottom end of the transmission head 306.

[0030] Specifically, when operating the device, the operator first places the fixed frame 1 in the soft soil foundation area to be treated, fixes the vertical drainage body 2 to the bottom of the inner wall of the fixed frame 1 and inserts it into the foundation, and lays the sealing membrane 4 to cover the vertical drainage body 2; then starts the vacuum pump 303 in the anti-leakage vacuum assembly 3, and connects it to the connecting pipe 6 through the transmission hose 305, transmission head 306 and clamping pipe 307 to extract the air in the sealed space, forming a negative pressure environment, which causes the pore water in the foundation soil to be discharged through the vertical drainage body 2 and the connecting pipe 6, thereby achieving foundation consolidation.

[0031] Furthermore, such as Figure 3 As shown, the following preferred technical solutions are provided:

[0032] Hydraulic boxes 308 are fixedly connected to both sides of the top of the fixed frame 301. The hydraulic press body 309 is fixedly connected inside the hydraulic box 308. The bottom of the hydraulic press body 309 is fixedly connected to the damping expansion joint 310. The purpose of this design is to precisely control the extension length of the damping expansion joint 310 through the hydraulic press body 309. When the terrain is different or the laying of the sealing membrane 4 is inconsistent, the height of the lower component can be flexibly adjusted. At the same time, the damping expansion joint 310 can buffer the impact force during operation and avoid rigid contact damage to the sealing membrane 4 or affect the stability of the vacuum system.

[0033] Furthermore, such as Figure 3 As shown, the following preferred technical solutions are provided:

[0034] The bottom end of the damping expansion joint 310 is fixedly connected to a sliding plate 311, and the surface of the sliding plate 311 is fixedly connected to a compaction frame 312 for pressing the sealing membrane 4. The purpose of this design is to use the compaction frame 312 to tightly press the sealing membrane 4 onto the foundation surface and the vertical drainage body 2, eliminate the gap between the sealing membrane 4 and the foundation, enhance the sealing effect, prevent outside air from entering, ensure the vacuum degree is stable during the vacuum preloading process, and improve the foundation treatment efficiency.

[0035] Furthermore, such as Figure 3 As shown, the following preferred technical solutions are provided:

[0036] Both sides of the inner wall of the compaction frame 312 are fixedly connected to the fixing plate 313. One end of the fixing plate 313 is fixedly connected to both sides of the transmission head 306. The purpose of this design is to provide stable support for the transmission head 306 through the fixing plate 313 when the compaction frame 312 presses the sealing film 4, so as to prevent the transmission head 306 from shaking or shifting due to force, and to ensure that the clamping tube 307 and the connecting tube 6 are always tightly connected, so as to avoid air leakage at the connection and affect the normal operation of the vacuum system.

[0037] Furthermore, such as Figure 4 As shown, the following preferred technical solutions are provided:

[0038] Fixing components 5 are fixedly connected to both sides of the front and back of the fixed frame 1. The fixing components 5 include fixing blocks 501 fixedly connected to both sides of the front and back of the fixed frame 1. A connecting plate 502 is fixedly connected to the middle of the bottom end of the fixing block 501. The purpose of this design is to provide a stable installation foundation for the lifting transmission structure of the ground nail 509. The connecting plate 502 guides and limits the sliding block 508 to ensure that the lifting process of the ground nail 509 is smooth, so that the fixing components 5 can effectively stabilize the fixed frame 1 on the foundation.

[0039] Furthermore, such as Figure 4 As shown, the following preferred technical solutions are provided:

[0040] The fixed block 501 has a motor box 503 fixedly connected inside, and the motor box 503 has a servo motor 504 fixedly connected inside. The output end of the servo motor 504 is fixedly connected to a transmission rod 505. The purpose of this design is to utilize the high precision and high response characteristics of the servo motor 504 to accurately control the rotation speed and angle of the transmission rod 505, thereby accurately controlling the raising and lowering of the ground nail 509. The insertion depth of the ground nail 509 can be quickly adjusted according to different foundation soil types and construction requirements, thereby improving the fixing efficiency of the device.

[0041] Furthermore, such as Figure 4 As shown, the following preferred technical solutions are provided:

[0042] A threaded rod 506 is fixedly connected to the bottom end of the transmission rod 505. A connecting rod 507 is threadedly connected to the bottom end of the threaded rod 506. A sliding block 508 is fixedly connected to the bottom end of the connecting rod 507. The sliding block 508 is slidably connected to the inner wall of the connecting plate 502. A ground nail 509 is fixedly connected to the bottom end of the sliding block 508. The purpose of this design is to convert the rotational motion of the transmission rod 505 into the linear lifting motion of the sliding block 508 and the ground nail 509 through the threaded transmission of the threaded rod 506 and the connecting rod 507, so as to realize the rapid and stable insertion or extraction of the ground nail 509 into the foundation, enhance the connection between the fixed frame 1 and the foundation, and prevent the device from shifting during the vacuum preloading process.

[0043] Working principle: In use, first place the device in the predetermined soft soil foundation treatment area, start the servo motor 504 in the fixing component 5, the servo motor 504 drives the transmission rod 505 to rotate, and through the threaded transmission of the threaded rod 506 and the connecting rod 507, the sliding block 508 slides down along the inner wall of the connecting plate 502, inserting the ground nail 509 into the foundation and stabilizing the fixing frame 1; then lay the sealing membrane 4, start the hydraulic press body 309 in the hydraulic box 308, control the extension of the damping expansion joint 310, drive the sliding plate 311 and the compaction frame 312 to move down, and press the sealing membrane 4 tightly against the foundation and the ground. On the vertical drainage body 2, the fixed plate 313 simultaneously stabilizes the transmission head 306; finally, the vacuum pump 303 in the leak-proof vacuum assembly 3 is started. The vacuum pump 303 is connected to the connecting pipe 6 through the transmission hose 305, the transmission head 306 and the clamping pipe 307, and the air in the sealed space is extracted to form a vacuum negative pressure. Under the action of pressure difference, the pore water in the foundation soil is discharged through the vertical drainage body 2 and the connecting pipe 6, realizing the consolidation treatment of the soft soil foundation; after the treatment is completed, the servo motor 504 and the hydraulic press body 309 are reversed to pull out the ground nail 509, and the compaction frame 312 is retracted to complete the disassembly of the device.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vacuum preloading device for consolidation treatment of soft soil foundation, comprising a fixed frame (1), a vertical drainage body (2), and a leak-proof vacuum assembly (3), characterized in that: A vertical drain body (2) is fixedly connected to the bottom of the inner wall of the fixed frame (1). A circular groove is opened in the middle of the top of the vertical drain body (2). A connecting pipe (6) is connected through the inner wall of the circular groove. A sealing film (4) that is easy to replace is placed on the surface of the vertical drain body (2). A leak-proof vacuum assembly (3) is fixedly connected to the top of the fixed frame (1). The leak-proof vacuum assembly (3) includes a fixed bracket (301) fixedly connected to the top of the fixed frame (1). A protective box (302) is fixedly connected to the middle of the top of the fixed bracket (301). A vacuum pump (303) is fixedly connected inside the protective box (302). An output pipe (304) is connected through the output end of the vacuum pump (303). A transmission hose (305) is connected through the input end of the vacuum pump (303). A transmission head (306) is connected through the bottom end of the transmission hose (305). A clamping tube (307) matching the connecting pipe (6) is connected through the bottom end of the transmission head (306).

2. The vacuum preloading device for consolidation treatment of soft soil foundation according to claim 1, characterized in that: Hydraulic boxes (308) are fixedly connected to both sides of the top of the fixed frame (301). A hydraulic press body (309) is fixedly connected inside the hydraulic box (308). A damping expansion joint (310) is fixedly connected to the bottom of the hydraulic press body (309).

3. A vacuum preloading device for consolidation treatment of soft soil foundation according to claim 2, characterized in that: The bottom end of the damping expansion joint (310) is fixedly connected to a sliding plate (311), and the surface of the sliding plate (311) is fixedly connected to a compaction frame (312) for pressing the sealing film (4).

4. A vacuum preloading device for consolidation treatment of soft soil foundation according to claim 3, characterized in that: Both sides of the inner wall of the compaction frame (312) are fixedly connected to a fixing plate (313), and one end of the fixing plate (313) is fixedly connected to both sides of the transmission head (306).

5. A vacuum preloading device for consolidation treatment of soft soil foundation according to claim 1, characterized in that: The fixed frame (1) has fixed components (5) fixedly connected to both sides of the front and back sides. The fixed components (5) include fixed blocks (501) fixedly connected to both sides of the front and back sides of the fixed frame (1). A connecting plate (502) is fixedly connected to the middle of the bottom end of the fixed block (501).

6. A vacuum preloading device for consolidation treatment of soft soil foundation according to claim 5, characterized in that: The fixed block (501) is internally fixedly connected to a motor box (503), the motor box (503) is internally fixedly connected to a servo motor (504), and the output end of the servo motor (504) is fixedly connected to a transmission rod (505).

7. A vacuum preloading device for consolidation treatment of soft soil foundation according to claim 6, characterized in that: The bottom end of the transmission rod (505) is fixedly connected to a threaded rod (506), the bottom end of the threaded rod (506) is threadedly connected to a connecting rod (507), the bottom end of the connecting rod (507) is fixedly connected to a sliding block (508), the sliding block (508) is slidably connected to the inner wall of the connecting plate (502), and the bottom end of the sliding block (508) is fixedly connected to a ground nail (509).

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