Construction device for expanding underground space under existing independent foundation

Abstract

The invention provides a construction device for expanding an underground space under an existing independent foundation, and relates to the technical field of underground space expanding, the construction device comprises a supporting mechanism mounted on the ground of a basement, a supporting plate is arranged in the supporting mechanism, and the supporting plate is supported on a wall of the basement; the supporting mechanism comprises a fixed box body, a lifting carrying assembly, a function switching assembly and a splicing assembly. The fixed box body is installed on the inner wall of the basement. Through the arrangement of the integrated lifting and carrying assembly, the function switching assembly and the splicing assembly, the multiple procedures of taking, placing, transporting, aligning and connecting of the supporting plate are integrated into one device to be continuously completed, the links which depend on manual hoisting, carrying, positioning and fastening in traditional construction are greatly reduced, the building speed of a supporting wall is greatly increased, and the construction efficiency is improved. The whole construction period is shortened, automation and integration of the whole process of supporting plate installation are achieved, and the construction efficiency is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of underground space expansion technology, specifically a construction device for expanding underground space on an existing independent foundation. Background Technology

[0002] The foundation of an existing, in-use building (such as an office building or residential building). This type of foundation is usually an independent concrete pier or raft slab that directly supports the columns or load-bearing walls above. Without demolishing the superstructure or affecting its safe use, underground spaces such as basements, parking lots, and equipment floors are excavated and constructed below or to the side of these independent foundations.

[0003] Patent publication number CN114808926A discloses a construction device for expanding underground space under an existing independent foundation. This invention belongs to the field of underground space expansion and includes a pile body. The pile body is characterized by being a hollow structure with several filter holes on its side, distributed along the axial direction of the pile body. A drill bit is located at the bottom of the pile body. The device also includes a frame installed on the foundation, with a lifting device and a driving device on the frame. The output end of the lifting device is rotatably connected to a limiting plate, which is fitted onto and connected to the pile body. The driving device is connected to the limiting plate and drives its rotation. This invention has the beneficial effects of preventing pile breakage, reducing the impact on the soil structure, facilitating the stepped extension of the pile body, and adapting to longer pile lengths.

[0004] Although the aforementioned patent can solve the problem of avoiding fracture of static pressure piles, it still has the following shortcomings: In traditional construction, the handling, lifting, alignment and splicing of support plates mainly rely on manual labor and simple machinery. The process is cumbersome, labor-intensive and time-consuming. Moreover, when manually installing support plates, problems such as positioning deviation, uneven splicing and inconsistent connection tightness are prone to occur, which affect the overall rigidity, flatness and sealing of the support wall, and may endanger the safety of the foundation pit. Summary of the Invention

[0005] The purpose of this invention is to provide a construction device for expanding underground space on an existing independent foundation, aiming to solve the problems of low construction efficiency, high safety risks, and difficulty in controlling installation quality of support plates in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a construction device for expanding underground space under an existing independent foundation includes a support mechanism installed on the basement floor, wherein a support plate is provided inside the support mechanism, and the support plate is supported on the basement wall. The support mechanism includes a fixed housing, a lifting and transporting assembly, a function switching assembly, and a splicing assembly. The fixed housing is installed on the inner wall of the basement. The lifting and transporting assembly includes a lifting frame, a drive assembly, a clamping assembly, and two lifting plates. The fixed housing has a guide groove, and the lifting frame slides within the guide groove. The drive assembly is installed inside the fixed housing, and its output end is connected to the lifting frame. The lifting plates slide within the lifting frame, and the clamping assembly is installed on the lifting plates. The function switching component is fixedly connected to the lifting frame; The splicing assembly is installed in the fixed box. The upper end of the support plate has a slot, and the lower end of the support plate has an insert plate. One of the insert plates of the support plate is guided to be inserted into the slot of the adjacent support plate located below it. The slot has a locking and limiting groove, and the insert plate has a through hole. The splicing assembly is provided with several detachable snap-fit ​​blocks. The snap-fit ​​blocks pass through the locking and limiting groove and are snap-fitted into the through hole to fix two adjacent support plates in a relatively fixed connection.

[0007] Preferably, the lifting frame includes two movable side plates, two first lead screws extending in the vertical direction, and two lifting blocks; The movable side plate is guided and slid in the guide groove, and each of the lifting plates is guided and slid in the corresponding movable side plate. The opposite sides of the two lifting plates are fixedly connected to the lifting block, and the lifting block is threadedly fitted on the first lead screw. The upper end of the fixed housing is provided with a strip-shaped hole, and a sliding block is guided and slidable in the strip-shaped hole. The lower end of the first lead screw rotates through the sliding block and is connected to the drive assembly for transmission.

[0008] Preferably, the drive assembly includes a moving frame, two first bevel gear sets, a first motor, a splined sleeve, and a second bevel gear set; The first motor is fixed on the inner bottom wall of the fixed housing. The output shaft of the first motor is fixedly connected to the spline sleeve rod. The end of the spline sleeve rod away from the first motor is connected to a rotating shaft through a second bevel gear set. The rotating shaft rotates on the movable frame. Both first bevel gear sets are connected to the rotating shaft. Both first lead screws are connected to the first bevel gear sets. The inner bottom wall of the fixed box is provided with a guide rail groove for guiding the movement of the movable frame.

[0009] Preferably, the function switching component includes two first telescopic rods and a placement frame. The first telescopic rods are fixed to the upper end of the fixed box, and the movable end of the first telescopic rod is fixedly connected to the movable side plate. The placement rack is fixed to the top of the fixed box, and several of the support plates are placed on the placement rack.

[0010] Preferably, the placement rack includes a placement frame and a placement slot, the placement frame is fixed to the top of the fixed box, the placement slot is disposed on the placement frame, and the support plate is placed in the placement slot.

[0011] Preferably, a connecting plate is fixed between the two lifting plates, and the clamping assembly is mounted on the connecting plate.

[0012] Preferably, the clamping assembly includes a second motor, a base frame, two bidirectional lead screws, two sets of connecting rods, and two clamping plates; The second motor is fixed on the connecting plate, the base frame is fixed on the connecting plate, the two bidirectional lead screws rotate on the base frame, the second motor is connected to the two bidirectional lead screws in a transmission connection, each bidirectional lead screw is threadedly connected to two threaded blocks, each clamping plate is hinged to the corresponding connecting rod group, and the connecting rod group is hinged to the threaded blocks.

[0013] Preferably, two main sprockets are fixed on the output shaft of the second motor, and a secondary sprocket is fixed at one end of each of the bidirectional lead screws. The main sprockets and the secondary sprockets are connected by chain drive.

[0014] Preferably, the splicing assembly includes a limiting component and a pushing component. The limiting component slides on the bottom wall of the fixed box, the snap-fit ​​block is disposed inside the limiting component, the pushing component is installed on the limiting component, and the pushing component is threadedly connected to the snap-fit ​​block.

[0015] Preferably, the limiting component includes a sliding frame and a second telescopic rod. The second telescopic rod is fixed to the bottom wall of the fixed box. The movable end of the second telescopic rod is fixedly connected to the sliding frame. The fixed box is provided with a sliding groove for guiding the sliding frame to slide. The locking block is guided to slide within the sliding frame. The pushing component includes a third motor and a second lead screw. The third motor is fixed on the sliding frame, and the output shaft of the third motor is fixedly connected to the second lead screw. The second lead screw is threadedly connected to several locking blocks.

[0016] The beneficial effects are: 1. By integrating lifting and transporting components, function switching components and splicing components, multiple processes such as picking up, placing, transporting, aligning and connecting the support plate are integrated into one device and completed continuously. This greatly reduces the number of manual hoisting, handling, positioning and fastening steps that are heavily reliant on in traditional construction, greatly speeds up the construction of the support wall, shortens the overall construction period, realizes full automation and integration of the support plate installation process, and significantly improves construction efficiency.

[0017] 2. By using mechanically driven clamping components for gripping and lifting, combined with the lateral positioning of the function switching components, it is possible to ensure that each support plate is accurately transported to the designed position, thereby improving the installation accuracy and connection reliability of the support structure and ensuring construction quality.

[0018] 3. The splicing components enable a quick and secure mechanical interlock between the upper and lower support plates, ensuring consistent and stable connection quality. This avoids problems such as misalignment and weak connections that may occur during manual installation, thereby ensuring the rigidity and sealing of the overall support system. Attached Figure Description

[0019] Figure 1 This is a rear-view structural schematic diagram of the present invention; Figure 2 This is a front view structural schematic diagram of the present invention; Figure 3 This is a rear view structural schematic diagram of Embodiment 1 of the present invention; Figure 4 This is a partial cross-sectional structural schematic diagram of the fixed box body of the present invention; Figure 5 This is a schematic diagram of the connection between the spline sleeve and the first motor according to the present invention; Figure 6 This is a schematic diagram of the structure of the clamping assembly clamping support plate of the present invention; Figure 7 This is a partial cross-sectional structural schematic diagram of the base frame of the present invention; Figure 8 This is a schematic diagram of the connection between the bidirectional lead screw and the threaded block of the present invention; Figure 9 This is a schematic diagram of the assembly components of the present invention installed inside a fixed box. Figure 10 This is a schematic diagram of the assembly component of the present invention, in which the snap-fit ​​block is inserted between two adjacent support plates; Figure 11 This is a structural schematic diagram of the assembly components of the present invention.

[0020] In the diagram: 1. Support plate; 2. Fixed housing; 3. Limiting component; 301. Sliding frame; 302. Second telescopic rod; 4. Lifting frame; 401. Moving side plate; 402. First lead screw; 403. Lifting block; 5. Drive assembly; 501. Moving frame; 502. First bevel gear set; 503. First motor; 504. Splined sleeve rod; 505. Second bevel gear set; 601. Second motor; 602. Base frame; 603. Bidirectional lead screw; 604. Linkage assembly; 605, clamping plate; 7, lifting plate; 8, slot; 9, insert plate; 10, locking limit slot; 11, through hole; 12, snap-fit ​​block; 13, strip hole; 14, sliding block; 15, rotating shaft; 16, first telescopic rod; 17, connecting plate; 18, placement frame; 1801, placement frame; 1802, placement slot; 19, threaded block; 20, main sprocket; 21, secondary sprocket; 22, pushing component; 2201, third motor; 2202, second lead screw. Detailed Implementation

[0021] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0022] Example 1 A construction device for expanding underground space on an existing independent foundation includes a support mechanism installed on the basement floor. The support mechanism contains a support plate 1, which is supported on the basement wall. The support mechanism includes a fixed box 2 and a lifting and transporting assembly. The fixed box 2 is installed on the inner wall of the basement. Through the lifting and transporting assembly, the support plate 1 is manually placed on the assembly. Then, under the action of the lifting and transporting assembly, the support plate 1 is clamped and pushed downward, so that the support plate 1 can be supported on the wall. Adjacent support plates 1 are connected by bolts, which improves construction efficiency and eliminates the need for manual placement of the support plates 1.

[0023] like Figure 3 As shown, the lifting and transporting assembly includes a lifting frame 4, a drive assembly 5, a clamping assembly, and two lifting plates 7. The lifting frame 4 is fixed on the fixed housing 2. The drive assembly 5 is installed inside the fixed housing 2. The output end of the drive assembly 5 is connected to the lifting plate frame 4 for transmission. The lifting plate 7 slides within the lifting frame 4. The clamping assembly is installed on the lifting plate 7 so that when the lifting plate 7 moves up and down, it can drive the clamping assembly to move up and down. When the clamping assembly moves up and down, it can move the support plate 1.

[0024] Specifically, the lifting frame 4 includes two movable side plates 401, two first lead screws 402 extending in the vertical direction, and two lifting blocks 403. The movable side plates 401 are fixed on the fixed housing 2. Each lifting plate 7 is guided and slidably within the corresponding movable side plate 401. The opposite sides of the two lifting plates 7 are fixedly connected to the lifting blocks 403. The lifting blocks 403 are threadedly fitted onto the first lead screws 402. When the drive assembly 5 is activated, it can drive the first lead screws 402 to rotate. Since the first lead screws 402 and the lifting blocks 403 are threadedly connected, the lifting blocks 403 can move up and down, thereby realizing the lifting plates 7 moving up and down along the extension direction of the movable side plates 401.

[0025] The drive assembly 5 includes a movable frame 501, two first bevel gear sets 502, and a first motor 503. The first motor 503 is fixed to the inner bottom wall of the fixed housing 2. The output shaft of the first motor 503 is fixedly connected to a rotating shaft 15. In this embodiment, the first bevel gear set 502 includes a first main bevel gear and a first secondary bevel gear. The first main bevel gear is fixed on the rotating shaft 15, and the first secondary bevel gear is fixed on the first lead screw 402. The first main bevel gear and the first secondary bevel gear mesh with each other. The rotating shaft 15 rotates on the movable frame 501. Both first bevel gear sets 502 are drivenly connected to the rotating shaft 15. Both first lead screws 402 are drivenly connected to the first bevel gear sets 502, so that the first motor 503 can start and drive the rotating shaft 15 to rotate. The rotation of the rotating shaft 15 can drive the first lead screw 402 to rotate through the first bevel gear sets 502.

[0026] like Figures 6-8 As shown, a connecting plate 17 is fixed between the two lifting plates 7. The clamping assembly is installed on the connecting plate 17. When the support plate 1 is moved to the bottom of the clamping assembly, the support plate 1 can be clamped by the clamping assembly. After clamping, the support plate 1 is pushed down to form two adjacent support plate modules. After the two adjacent support plates 1 are spliced, the workers fix the two adjacent support plates 1 together with bolts so that the whole is connected. Positioning bolts can also be added to the support plate 1 to ensure that the support plate 1 is in a vertical state. In this embodiment, the positioning bolt includes two nuts and a stud. The support plate 1 is fitted on the stud and located between the two nuts. The stud is fixed to the wall. After the verticality of the support plate 1 is measured, the position of the two nuts is adjusted so that the upper and lower adjacent support plates 1 are in the same vertical position. The structure and principle of the positioning bolt are existing technologies and will not be described in detail here.

[0027] Specifically, the clamping assembly includes a second motor 601, a base frame 602, two bidirectional lead screws 603, two sets of connecting rods 604, and two clamping plates 605. The second motor 601 is fixed on the connecting plate 17, the base frame 602 is fixed on the connecting plate 17, and the two bidirectional lead screws 603 rotate on the base frame 602. The second motor 601 is connected to the two bidirectional lead screws 603 in a transmission connection. Each bidirectional lead screw 603 is threadedly connected to two threaded blocks 19. Each clamping plate 605 is hinged to the corresponding connecting rod set 604. The connecting rod set 604 is hinged to the threaded blocks 19, which enables the second motor 601 to start and drive the two bidirectional lead screws 603 to rotate. The rotation of the bidirectional lead screws 603 causes the two threaded blocks 19 to move in opposite or opposite directions along the extension direction of the bidirectional lead screws 603, thereby causing the two clamping plates 605 to move in opposite or opposite directions to clamp the support plate 1.

[0028] Two main sprockets 20 are fixed on the output shaft of the second motor 601, and a secondary sprocket 21 is fixed at one end of each bidirectional lead screw 603. When the second motor 601 is started, the output shaft of the second motor 601 can drive the two main sprockets 20 to rotate. Since the main sprockets 20 and the secondary sprockets 21 are connected by chain drive, they can drive the secondary sprockets 21 to rotate, thereby driving the two bidirectional lead screws 603 to rotate.

[0029] Working principle: The device is installed on the basement floor. After the operator initially places the single support plate 1 below the clamping assembly, the second motor 601 starts. The second motor 601 drives the two double-acting screws 603 to rotate through the main sprocket 20 and the auxiliary sprocket 21. The two threaded blocks 19 on each double-acting screw 603 then move linearly in opposite directions. This motion is converted into the opening and closing of the two clamping plates 605 through the connecting rod group 604, thus firmly clamping the two sides of the support plate 1. After clamping, the first motor 503 starts, and its output shaft drives the rotating shaft 15 to rotate. The rotating shaft 15 transmits power to the two clamping plates 605 through two pairs of first bevel gear groups 502. The vertically installed first lead screw 402, along with the lifting block 403 connected to it via a threaded connection, moves vertically. Since the lifting block 403 is fixedly connected to the lifting plate 7, and the clamping assembly is mounted on the connecting plate 17, the entire clamping assembly holding the support plate 1 descends smoothly along with the lifting plate 7 until the support plate 1 is precisely pushed to the designed support position of the basement exterior wall. Once the support plate 1 is lowered to the predetermined height, the operator can temporarily maintain the clamping state to assist in positioning. Subsequently, the verticality and planar position of the support plate 1 are finely adjusted and temporarily fixed using positioning bolts (consisting of studs and two adjusting nuts) pre-installed on the wall. After adjustment, this support plate 1 is finally tightened to the adjacent support plate 1 below it using bolts, thus forming a continuous support wall. This completes the installation cycle of one support plate 1. The clamping assembly is released, the lifting and transporting assembly resets, and the installation of the next support plate 1 can begin.

[0030] Example 2 In the structure of Embodiment 1, the same structure as in Embodiment 1 will not be described again. In Embodiment 1, the handling of the support plate 1 is often done manually, which results in high labor costs and the workers are prone to injury during the handling of the support plate 1.

[0031] Based on the above problems, in this embodiment, as follows: Figures 1-5 As shown, the support mechanism also includes a function switching component, which is fixedly connected to the lifting frame 4. After the function switching component is activated, the lifting frame 4 can move along the extension direction of the guide groove so that the stacked support plate 1 can be moved above the wall support position so that the adjacent support plates 1 can be spliced ​​together.

[0032] Specifically, a guide groove is provided on the fixed housing 2, the lifting frame 4 slides within the guide groove, the movable side plate 401 slides within the guide groove, and a strip-shaped hole 13 is provided at the upper end of the fixed housing 2. A sliding block 14 slides within the strip-shaped hole 13. The lower end of the first lead screw 402 rotates through the sliding block 14 and is connected to the drive assembly 5, so that when the movable side plate 401 moves along the guide groove under the action of the function switching assembly, the sliding block 14 can move and adjust along the extension direction of the strip-shaped hole 13. The drive assembly 5 also includes a splined sleeve 504 and a second bevel gear set 505. In this embodiment, the splined sleeve 504 includes a splined rod and a splined sleeve. The splined sleeve is guided and fitted onto the splined rod. The first motor 503 is fixed on the inner bottom wall of the fixed housing 2. The output shaft of the first motor 503 is fixedly connected to the splined sleeve 504. The end of the splined sleeve 504 away from the first motor 503 is connected to a rotating shaft 15 through the second bevel gear set 505, so that the first motor 503 can start and drive the first lead screw 402 to rotate through the splined sleeve 504 and the first bevel gear set 502. When the movable side plate 401 moves, the splined sleeve 504 can be extended and retracted to adjust the position of the movable side plate 401. However, the first motor 503 can drive the first lead screw 402 to rotate. A guide rail groove is provided on the inner bottom wall of the fixed housing 2 for guiding the movable frame 501 to move.

[0033] like Figure 1 and Figure 2 As shown, the function switching component includes two first telescopic rods 16 and a placement frame 18. In this embodiment, the first telescopic rods 16 are electric or hydraulic telescopic rods. The principle and structure of electric or hydraulic telescopic rods are existing technologies and will not be described in detail here. The first telescopic rods 16 are fixed to the upper end of the fixed box 2. The movable end of the first telescopic rod 16 is fixedly connected to the movable side plate 401. When the first telescopic rod 16 is activated, it can pull the movable side plate 401 to move along the guide groove, thereby driving the movable frame 501 to move along the extension direction of the guide groove. While the movable frame 501 is moving, it can also drive the movable side plate 401 to move along the extension direction of the guide groove. The placement frame 18 is fixed to the top of the fixed box 2. Several support plates 1 are placed on the placement frame 18 so that the movable frame 501 can move onto the placement frame 18 to clamp the support plates 1.

[0034] The placement frame 18 includes a placement frame 1801 and a placement groove 1802. The placement frame 1801 is fixed to the top of the fixed box 2, and the placement groove 1802 is set on the placement frame 1801. The support plate 1 is placed on the placement groove 1802. When the clamping component needs to clamp a new support plate 1, the moving frame 501 can be moved to the upper end of the placement groove 1802 first, and then the support plate 1 can be clamped by the clamping component. After clamping, the support plate 1 can be moved to the position of the placement support plate 1 so that the support plate 1 can be spliced.

[0035] Compared to Embodiment 1, in this embodiment, the mechanically driven clamping assembly is used for gripping and lifting, and combined with the lateral positioning of the function switching assembly, it can ensure that each support plate 1 is accurately transported to the designed position without the need for manual handling. This not only improves work efficiency but also reduces the labor intensity of workers and avoids injuries.

[0036] Example 3: In the structure of Example 1 and Example 2, the same structure in Example 1 and Example 2 will not be described again. After the two adjacent support plates 1 in Example 1 and Example 2 are assembled, they need to be bolted manually to fix the two support plates 1 to each other. The operation requires manual operation and is cumbersome.

[0037] Based on the above problems, in this embodiment, as follows: Figures 9-11 As shown, the support mechanism also includes a splicing assembly, which is installed inside the fixed housing 2. The upper end of the support plate 1 has a slot 8, and the lower end of the support plate 1 is fixed with an insert plate 9. One of the insert plates 9 of the support plate 1 is guided and inserted into the slot 8 of the support plate 1 adjacent to it and located below it. The slot 8 has a locking and limiting groove 10, and the insert plate 9 has a through hole 11. The splicing assembly is provided with several detachable snap-fit ​​blocks 12. The snap-fit ​​blocks 12 pass through the locking and limiting groove 10 and snap-fit ​​with the through hole 11, so that the two adjacent support plates 1 are relatively fixedly connected. After the insert plate 9 is guided and inserted into the slot 8, the splicing assembly can push the snap-fit ​​blocks 12 through the locking and limiting groove 10 and into the through hole 11, so that the two adjacent support plates 1 are relatively fixedly connected.

[0038] Specifically, the splicing assembly includes a limiting member 3 and a pushing member 22. The limiting member 3 slides on the bottom wall of the fixed box 2. The snap-fit ​​block 12 is set inside the limiting member 3. The pushing member 22 is installed on the limiting member 3 and is threadedly connected to the snap-fit ​​block 12. When the limiting member 3 abuts against the support plate 1, the pushing member 22 can push the snap-fit ​​block 12 along the extension direction of the limiting member 3, so that the snap-fit ​​block 12 passes through the locking limiting groove 10 and snaps into the through hole 11.

[0039] The limiting component 3 includes a sliding frame 301 and a second telescopic rod 302. In this embodiment, the second telescopic rod 302 is an electric telescopic rod or a hydraulic telescopic rod. The structure and principle of the electric telescopic rod or the hydraulic telescopic rod are existing technologies and will not be described in detail here. The sliding frame 301 has a rectangular tube structure with its opening facing the support plate 1. The rectangular tube structure is adapted to the snap-fit ​​block 12. Each snap-fit ​​block 12 has a threaded hole pre-drilled, which is adapted to the thread of the second lead screw 2202, so that the snap-fit ​​block 12 can be supplemented. The second telescopic rod 302 is fixed to the inner bottom wall of the fixed box 2. The movable end of the rod 302 is fixedly connected to the sliding frame 301. A sliding groove is provided on the fixed housing 2 for guiding the sliding frame 301 to slide. After the second telescopic rod 302 is activated, it can push the sliding frame 301 to move along the sliding groove. The sliding frame 301 stops when it abuts against the support plate 1, and the locking block 12 guides the sliding within the sliding frame 301. The pushing component 22 includes a third motor 2201 and a second lead screw 2202. The third motor 2201 is fixed to the sliding frame 301, and the output shaft of the third motor 2201 is connected to the second lead screw 2202. 02. Fixed connection: The second lead screw 2202 is threadedly connected to several locking blocks 12. When the sliding frame 301 is pushed back, the third motor 2201 starts. After the third motor 2201 starts, it can drive the second lead screw 2202 to rotate. When the second lead screw 2202 rotates, it moves the locking blocks 12 towards the position of the support plate 1. Because the locking blocks 12 are guided and slid within the sliding frame 301, the second lead screw 2202 can move the locking blocks 12 into the through hole 11 when it rotates. In this embodiment, the size of the locking block 12 is adapted to the locking limit groove 10 and the through hole 11. During the engagement process, the second lead screw 2202 rotates, which drives the engagement block 12 in the sliding frame 301 to move synchronously towards the position of the support plate 1. When the engagement block 12 closest to the support plate 1 (referred to as the first engagement block) disengages from the second lead screw 2202, the second lead screw 2202 rotates, which enables the second engagement block 12 closest to the support plate 1 (referred to as the second engagement block) to push the first engagement block to move, so that the first engagement block is squeezed into the through hole 11 under the action of the second engagement block. After that, the second telescopic rod 302 retracts, causing the second engagement block to disengage from the corresponding through hole 11.

[0040] In this embodiment, when two adjacent support plates 1 are spliced, the upper support plate 1 is first vertically inserted into the lower support plate 1. A slot is provided on the inner wall of the slot 8, and a locking strip is fixed on the insert plate 9. When the insert plate 9 is guided and inserted into the slot 8, the locking strip is also inserted into the slot. Then the sliding frame 301 is pressed against the support plate 1, and then the locking block 12 is passed through the locking limit groove 10 and inserted into the through hole 11.

[0041] After assembly, the support plate 1 is fixed to the existing wall at regular intervals with bolts to stabilize the assembled support plate 1.

[0042] Compared to Embodiments 1 and 2, the splicing assembly achieves a quick and secure mechanical interlock between the upper and lower support plates 1, ensuring stable and consistent connection quality. It does not require manual operation, avoiding problems such as misalignment and weak connection that may occur during manual installation, thereby ensuring the rigidity and sealing of the overall support system.

[0043] The embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. The basic concept of the present invention is to integrate multiple processes of picking up, placing, transporting, aligning and connecting the support plate 1 into a single device through a lifting and transporting assembly, a function switching assembly 6 and a splicing function, thereby completing them continuously. This significantly reduces the number of manual hoisting, handling, positioning and fastening steps that are heavily reliant on in traditional construction, and improves work efficiency. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A construction device for expanding underground space on an existing independent foundation, characterized in that, Includes a support mechanism installed on the basement floor, wherein a support plate (1) is provided inside the support mechanism, and the support plate (1) is supported on the basement wall; The support mechanism includes a fixed box (2), a lifting and transporting assembly, a function switching assembly, and a splicing assembly. The fixed box (2) is installed on the inner wall of the basement. The lifting and transporting assembly includes a lifting frame (4), a drive assembly (5), a clamping assembly, and two lifting plates (7). The fixed housing (2) has a guide groove, the lifting frame (4) slides within the guide groove, the drive assembly (5) is installed inside the fixed housing (2), the output end of the drive assembly (5) is connected to the lifting frame (4) in a transmission connection, the lifting plate (7) slides within the lifting frame (4), and the clamping assembly is installed on the lifting plate (7). The function switching component is fixedly connected to the lifting frame (4); The splicing assembly is installed inside the fixed box (2). The upper end of the support plate (1) is provided with a slot (8), and the lower end of the support plate (1) is fixed with a plug plate (9). One of the plug plates (9) of the support plate (1) is guided and inserted into the slot (8) of the support plate (1) adjacent to it and located below it. The slot (8) is provided with a locking and limiting groove (10), and the plug plate (9) is provided with a through hole (11). The splicing assembly is provided with several detachable snap-fit ​​blocks (12). The snap-fit ​​blocks (12) pass through the locking and limiting groove (10) and snap-fit ​​with the through hole (11) to make the two adjacent support plates (1) relatively fixedly connected.

2. The construction device for expanding underground space under an existing independent foundation as described in claim 1, characterized in that, The lifting frame (4) includes two movable side plates (401), two first lead screws (402) extending in the vertical direction, and two lifting blocks (403). The movable side plate (401) is guided and slid in the guide groove, and each of the lifting plates (7) is guided and slid in the corresponding movable side plate (401). The opposite sides of the two lifting plates (7) are fixedly connected to the lifting block (403), and the lifting block (403) is threaded onto the first lead screw (402). The upper end of the fixed box (2) is provided with a strip hole (13), and a sliding block (14) is guided and slid in the strip hole (13). The lower end of the first lead screw (402) rotates through the sliding block (14) and is connected to the drive assembly (5) for transmission.

3. The construction device for expanding underground space under an existing independent foundation as described in claim 2, characterized in that, The drive assembly (5) includes a moving frame (501), two first bevel gear sets (502), a first motor (503), a spline sleeve (504), and a second bevel gear set (505). The first motor (503) is fixed on the inner bottom wall of the fixed housing (2). The output shaft of the first motor (503) is fixedly connected to the spline sleeve (504). The end of the spline sleeve (504) away from the first motor (503) is connected to the rotating shaft (15) through the second bevel gear set (505). The rotating shaft (15) rotates on the moving frame (501). Both first bevel gear sets (502) are connected to the rotating shaft (15). Both first lead screws (402) are connected to the first bevel gear set (502). The inner bottom wall of the fixed box (2) is provided with a guide rail groove for guiding the movement of the movable frame (501).

4. The construction device for expanding underground space under an existing independent foundation as described in claim 3, characterized in that, The function switching component includes two first telescopic rods (16) and a placement rack (18). The first telescopic rods (16) are fixed to the upper end of the fixed box (2), and the movable end of the first telescopic rods (16) is fixedly connected to the movable side plate (401). The placement rack (18) is fixed to the top of the fixed box (2), and several of the support plates (1) are placed on the placement rack (18).

5. A construction device for expanding underground space under an existing independent foundation as described in claim 4, wherein the placement frame (18) includes a placement frame (1801) and a placement groove (1802), the placement frame (1801) is fixed on the top of the fixed box (2), the placement groove (1802) is set on the placement frame (1801), and the support plate (1) is placed in the placement groove (1802).

6. A construction device for expanding underground space under an existing independent foundation according to any one of claims 1-5, characterized in that, A connecting plate (17) is fixed between the two lifting plates (7), and the clamping assembly is mounted on the connecting plate (17).

7. The construction device for expanding underground space under an existing independent foundation as described in claim 6, characterized in that, The clamping assembly includes a second motor (601), a base frame (602), two bidirectional lead screws (603), two sets of linkages (604), and two clamping plates (605). The second motor (601) is fixed on the connecting plate (17), the base frame (602) is fixed on the connecting plate (17), the two bidirectional lead screws (603) rotate on the base frame (602), the second motor (601) is connected to the two bidirectional lead screws (603) in a transmission connection, each bidirectional lead screw (603) is threadedly connected to two threaded blocks (19), each clamping plate (605) is hinged to the corresponding connecting rod group (604), and the connecting rod group (604) is hinged to the threaded block (19).

8. A construction device for expanding underground space under an existing independent foundation as described in claim 7, characterized in that, Two main sprockets (20) are fixed on the output shaft of the second motor (601), and a secondary sprocket (21) is fixed at one end of each of the bidirectional lead screws (603). The main sprockets (20) and the secondary sprockets (21) are connected by chain drive.

9. A construction device for expanding underground space under an existing independent foundation as described in claim 1, characterized in that, The splicing assembly includes a limiting component (3) and a pushing component (22). The limiting component (3) is guided and slid on the bottom wall of the fixed box (2). The snap-fit ​​block (12) is set inside the limiting component (3). The pushing component (22) is installed on the limiting component (3) and is threadedly connected to the snap-fit ​​block (12).

10. A construction device for expanding underground space under an existing independent foundation as described in claim 9, characterized in that, The limiting component (3) includes a sliding frame (301) and a second telescopic rod (302). The second telescopic rod (302) is fixed on the bottom wall of the fixed box (2). The movable end of the second telescopic rod (302) is fixedly connected to the sliding frame (301). The fixed box (2) is provided with a sliding groove for guiding the sliding frame (301) to slide. The snap-fit ​​block (12) is guided to slide inside the sliding frame (301). The pushing component (22) includes a third motor (2201) and a second lead screw (2202). The third motor (2201) is fixed on the sliding frame (301). The output shaft of the third motor (2201) is fixedly connected to the second lead screw (2202). The second lead screw (2202) is threadedly connected to several locking blocks (12).

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