A support changing device for a foundation pit support

Abstract

The application discloses a support changing device for a foundation pit, and relates to the technical field of foundation pit support, which comprises a support bottom plate, a vertical plate fixed on the support bottom plate, an adjusting assembly for driving a sliding plate to slide, a plurality of rotating seats I fixed on a rotating shaft II, a supporting frame installed on a lifting plate, a clamping block II slidingly installed on a connecting seat II, a fixing disc fixed on the clamping block II, a rotary connecting assembly rotatably installed on the clamping block I, and an extension support assembly installed between the rotary connecting assembly and the clamping block II. The supporting frame is arranged to support the foundation pit, and a support structure formed by an extension column and a support cylinder supports the supporting frame. When the support changing operation is performed, the clamping block II and the clamping block I are respectively clamped with the connecting seat II and the rotating seat I, the support structure can be quickly disassembled or installed, and the operation efficiency of the support structure replacement is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of foundation pit support technology, specifically a support replacement device for internal support of foundation pits. Background Technology

[0002] An excavation pit is a temporary trench excavated for underground structure construction in building engineering, and it is a fundamental component of underground engineering. The excavation depth and surrounding environment determine the support level, which is classified into three levels according to standards: Level 1, Level 2, and Level 3. The higher the level, the more stringent the support and monitoring requirements. Common support methods include slope protection, soil nailing walls, pile foundations, and diaphragm walls, which must be selected rationally based on geological conditions. During construction, strict control of the excavation slope and dewatering measures is necessary to prevent collapses, water inrushes, and other potential hazards. Simultaneously, real-time monitoring of the excavation pit slope, surrounding buildings, and pipelines is required, with timely data feedback and adjustments to the construction plan to ensure construction safety and environmental stability.

[0003] Pit support replacement is a crucial step in deep pit internal support systems, safely transferring the soil and water pressure on the retaining structure from temporary internal supports to the main basement structure. However, current pit support replacement devices have poor adjustability and cannot be adapted to support needs. Furthermore, the installation of the support structure is inconvenient during the replacement process, hindering the improvement of operation efficiency. To address these shortcomings, a pit support replacement device is provided to solve these problems. Summary of the Invention

[0004] The purpose of this invention is to provide a replacement support device for internal support in foundation pits, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A support replacement device for internal support in a foundation pit includes a support base plate, a vertical plate fixed on the support base plate, a horizontally slidable translation plate on the support base plate, an adjustment component for driving the translation plate to slide on the support base plate, a vertically slidable lifting plate on the vertical plate, a rotating shaft II rotatably mounted on the translation plate, a rotating shaft I rotatably mounted on the lifting plate, a plurality of equally spaced rotating seats I fixedly mounted on the rotating shaft II, a plurality of equally spaced connecting seats II fixedly mounted on the rotating shaft I, each connecting seat II corresponding to a rotating seat I, a support frame mounted on the lifting plate, a locking block II slidably mounted on the connecting seat II, a fixed plate fixed on the locking block II, a locking block I slidably mounted on the rotating seat I, a rotating connecting component rotatably mounted on the locking block I, and a telescopic support component installed between the rotating connecting component and the locking block II.

[0006] As an improvement of the present invention: the adjustment assembly includes a threaded rod rotatably mounted on the support base plate, a sliding sleeve block fixed to the translation plate is threadedly sleeved on the threaded rod, a bevel gear I is fixedly sleeved on the threaded rod, a bevel gear II is meshed on the bevel gear I, and a handwheel is coaxially fixed on the bevel gear II.

[0007] As an improvement of the present invention: the rotary connection assembly includes a rotary column rotatably mounted on the snap-fit ​​block I, a mating plate II fixed at the end of the rotary column, a mating plate I mounted on the mating plate II by bolts and nuts, and the mating plate I fixed to the telescopic support assembly.

[0008] As an improvement of the present invention: the telescopic support assembly includes a support cylinder fixed on the docking plate I, an extension column is threadedly connected to the support cylinder, and a fixing plate is fixed to one end of the extension column away from the support cylinder, and the fixing plate is fixed on the snap-fit ​​block II.

[0009] As an improvement of the present invention: a screw ring is fixed on the support cylinder, and a locking stud that abuts against the extension column is threaded onto the support cylinder.

[0010] As an improvement of the present invention: a limiting block is fixed on the snap-fit ​​block I and slidably embedded in the rotating seat I; a sleeve is fixed on the rotating seat I; an insert is slidably installed on the sleeve; an isosceles trapezoidal groove adapted to the insert is opened on the limiting block; and a wedge surface is opened at the end of the insert.

[0011] As an improvement of the present invention: a positioning disk is fixed on the rotating seat I, a connecting seat I is fixed on the translation plate, a triangular positioning block is slidably installed on the connecting seat I, a plurality of V-grooves are circumferentially opened on the positioning disk, the triangular positioning block is engaged with the V-grooves, and a support spring is fixed between the triangular positioning block and the connecting seat I.

[0012] As an improvement of the present invention: the upright plate has a receiving cavity for the sliding extension of the lifting plate, the lifting plate and the translation plate are fixed with a connecting column, and the upright plate has a slide rail adapted to the sliding of the connecting column.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This invention supports the foundation pit by setting up a support frame, and supports the support frame by a support structure composed of an extension column and a support cylinder. When the support is replaced, the support structure can be quickly disassembled or installed by means of the snap-fit ​​block II and snap-fit ​​block I engaging with the connecting seat II and the rotating seat I respectively, which greatly improves the efficiency of the support structure replacement operation.

[0014] 2. This invention uses an adjustable component to drive the translation plate to slide horizontally relative to the supporting base plate, and a telescopic support component to drive the lifting plate to rise and fall vertically, thereby achieving the effect of adjusting the support height of the support frame. The tilt angle of the telescopic support component can be adaptively adjusted according to the support height to ensure effective internal support for the foundation pit. During the adjustment of the support frame height, the positioning plate rotates with the rotating seat I, and the set triangular positioning block and V-groove engage to effectively lock the support cylinder after the angle is adjusted, greatly improving the reliability of the foundation pit support. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged diagram of section A in the middle; Figure 3 For the present invention Figure 1 A structural diagram from a certain perspective; Figure 4 This is a schematic diagram showing the connection of components such as the telescopic support assembly, rotating seat I, extension column, and connecting seat II in this invention. Figure 5 This is a partial structural diagram of the present invention; Figure 6 This is a schematic diagram showing the connection of components such as the docking plate II, rotating column, insertion block, and limiting block in this invention; Figure 7 This is a schematic diagram showing the connection of components such as the extension column, the support cylinder, and the docking plate I in this invention; Figure 8 This is a schematic diagram showing the connection of components such as the support frame, lifting plate, and upright plate in this invention; Figure 9 This is a schematic diagram of the support frame and lifting plate in this invention.

[0016] In the diagram: 1-Support base plate, 2-Upright plate, 3-Lifting plate, 4-Transfer plate, 5-Connecting seat I, 6-Support cylinder, 7-Rotating seat I, 8-Extension column, 9-Connecting seat II, 10-Rotating shaft I, 11-Rotating shaft II, 12-Bevel gear I, 13-Threaded rod, 14-Sliding sleeve block, 15-Handwheel, 16-Tightening ring, 17-Matching plate I, 18-Matching plate II, 19-Snap-fit ​​block I, 20-Limit position 21-Insertion block, 22-Push spring, 23-Sleeve, 24-V groove, 25-Triangular positioning block, 26-Support spring, 27-Rotating column, 28-Isosceles trapezoidal groove, 29-Locking stud, 30-Bolt and nut, 31-Connecting column, 32-Bevel gear II, 33-Fixing disc, 34-Snap-fit ​​block II, 35-Wedge surface, 36-Receiving cavity, 37-Positioning disc, 38-Slide rail, 39-Support frame. Detailed Implementation

[0017] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention. It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0018] First embodiment: Please refer to the appendix Figure 1 - Appendix Figure 9 A support replacement device for internal support in a foundation pit includes a support base plate 1, a vertical plate 2 fixed on the support base plate 1, a horizontally sliding translation plate 4 mounted on the support base plate 1, an adjustment component for driving the translation plate 4 to slide on the support base plate 1, a vertically sliding lifting plate 3 mounted on the vertical plate 2, a rotating shaft II11 rotatably mounted on the translation plate 4, a rotating shaft I10 rotatably mounted on the lifting plate 3, a plurality of equally spaced rotating seats I7 fixedly mounted on the rotating shaft II11, a plurality of equally spaced connecting seats II9 fixedly mounted on the rotating shaft I10, the connecting seats II9 and the rotating seats I7 corresponding one-to-one, a support frame 39 mounted on the lifting plate 3, a locking block II34 slidably mounted on the connecting seat II9, a fixed disk 33 fixed on the locking block II34, a locking block I19 slidably mounted on the rotating seat I7, a rotating connecting component rotatably mounted on the locking block I19, and a telescopic support component installed between the rotating connecting component and the locking block II34.

[0019] The support base plate 1 of this device is installed and fixed at the bottom of the foundation pit by fasteners. The support frame 39 supports the inside of the foundation pit. The sliding plate 4 can be slidably adjusted by the set adjustment components. By sliding the sliding plate 4, the sliding plate 4 can drive the lifting plate 3 to slide vertically with the help of the elastic support components, thereby realizing the height adjustment effect of the support frame 39. This allows for flexible adjustment of the height position of the support frame 39 for the support area, ensuring reliable support for the foundation pit.

[0020] Specifically, the adjustment assembly includes a threaded rod 13 rotatably mounted on the support base plate 1, a sliding sleeve 14 fixed to the translation plate 4 and threadedly sleeved on the threaded rod 13, a bevel gear I12 fixedly sleeved on the threaded rod 13, a bevel gear II32 meshing with the bevel gear I12, and a handwheel 15 coaxially fixed on the bevel gear II32.

[0021] Rotating the handwheel 15 drives the bevel gear II 32 to rotate, which in turn drives the bevel gear I 12 to rotate. The bevel gear I 12 drives the threaded rod 13 to rotate, which in turn drives the sliding sleeve 14 connected to it to move. The sliding sleeve 14 causes the translation plate 4 to slide relative to the support base plate 1. At this time, the translation plate 4 drives the position adjustment of the connecting seat II 9 and the rotating shaft I 10 through the connecting seat I 5, the rotating shaft II 11 and the telescopic support assembly, thereby achieving the height adjustment effect of the lifting plate 3, that is, achieving flexible adjustment of the height of the support frame 39, and ensuring effective internal support for a specific area of ​​the foundation pit.

[0022] The rotating connection assembly of this device includes a rotating column 27 rotatably mounted on the snap-fit ​​block I19. A mating plate II18 is fixed to the end of the rotating column 27, and a mating plate I17 is mounted on the mating plate II18 via bolts and nuts 30. The mating plate I17 is fixed to the telescopic support assembly. The mating plate II18 and mating plate I17 are detachably connected via bolts and nuts 30, allowing the rotating column 27 to rotate relative to the snap-fit ​​block I19, thus facilitating the rotational adjustment of the mating plate II18 and mating plate I17.

[0023] The telescopic support assembly includes a support cylinder 6 fixed to the docking plate I17, an extension post 8 threadedly connected to the support cylinder 6, a fixing plate 33 fixed to the end of the extension post 8 away from the support cylinder 6, and the fixing plate 33 fixed to the snap-fit ​​block II34. A screw ring 16 is fixed to the support cylinder 6, and a locking stud 29 threadedly connected to the support cylinder 6 abuts against the extension post 8.

[0024] Based on the above configuration, the support cylinder 6 can be driven to rotate by turning the screw ring 16. Since the snap-fit ​​block II34 is snapped onto the connecting seat II9, the extension column 8 remains stationary when the support cylinder 6 rotates. That is, the support cylinder 6 rotates relative to the extension column 8 while moving axially, thereby achieving flexible adjustment of the support structure formed by the support cylinder 6 and the extension column 8, ensuring reliable positioning of the lifting plate 3. By turning the locking stud 29 to abut against the extension column 8, the relative positions of the support cylinder 6 and the extension column 8 are locked, improving the stability of the support process.

[0025] Second embodiment: Please refer to the appendix Figure 1 - Appendix Figure 9 In addition to the first embodiment, the device has a limiting block 20 fixed on the snap-fit ​​block I19 and slidably embedded in the rotating seat I7. The rotating seat I7 has a sleeve 23 fixed on it, and an insert 21 is slidably installed on the sleeve 23. The limiting block 20 has an isosceles trapezoidal groove 28 that matches the insert 21, and the end of the insert 21 has a wedge surface 35.

[0026] During the support replacement process, the replacement support structure can be installed between the connecting seat II9 and the rotating seat I7, and then the original support structure can be disassembled. Because the snap-fit ​​block II34 is slidably snapped into the connecting seat II9 and the snap-fit ​​block I19 is slidably snapped into the rotating seat I7, the quick installation and disassembly of the support structure is greatly facilitated, and the convenience and efficiency of the support replacement operation in the foundation pit are significantly improved.

[0027] During the aforementioned support replacement process, after the snap-fit ​​block I19 snaps into the rotating seat I7, the insert block 21 is snapped into the isosceles trapezoidal groove 28 under the elastic pushing action of the push spring 22, which temporarily locks the position of the snap-fit ​​block I19. Due to the isosceles trapezoidal groove 28 and the wedge surface 35 structure on the insert block 21, the docking and separation operation of the snap-fit ​​block I19 and the limiting block 20 is simple and quick, and the reliability after installation is greatly improved.

[0028] In addition, a positioning disk 37 is fixed on the rotating seat I7, and a connecting seat I5 is fixed on the translation plate 4. A triangular positioning block 25 is slidably installed on the connecting seat I5. Several V-grooves 24 are circumferentially opened on the positioning disk 37. The triangular positioning block 25 is engaged with the V-grooves 24. A support spring 26 is fixed between the triangular positioning block 25 and the connecting seat I5.

[0029] By engaging the triangular positioning block 25 with the V-groove 24, the triangular positioning block 25 can engage the positioning plate 37 during the rotation adjustment of the support cylinder 6. This ensures that after the position adjustment of the translation plate 4, the support cylinder 6 and the extension column 8 have more reliable stability after the angle adjustment, guaranteeing that the internal support of the foundation pit can be stably supported before and after the support replacement.

[0030] Additionally, a receiving cavity 36 is provided within the upright plate 2 for the sliding extension of the lifting plate 3. A connecting column 31 is fixed to the support of the lifting plate 3 and the sliding plate 4. A slide rail 38 is provided on the upright plate 2 to slide and adapt to the connecting column 31. The sliding plate 4 can be vertically adjusted relative to the support frame 39. The connecting column 31 and the slide rail 38 can slide relative to each other, serving as a guide for adjusting the height of the support frame 39 and ensuring stable adjustment of the support frame 39's position.

[0031] In summary, this invention supports the foundation pit using a support frame 39, which is supported by a support structure consisting of an extension column 8 and a support cylinder 6. During support replacement, the fastening and disassembly of the support structure can be achieved by engaging the connecting seat II9 and the rotating seat I7 with the snap-fit ​​blocks II34 and I19 respectively, significantly improving the efficiency of support structure replacement. The invention also features an adjustment component that drives the translation plate 4 to slide horizontally relative to the support base plate 1, and a telescopic support component that drives the lifting plate 3 to rise and fall vertically, thus adjusting the support height of the support frame 39. The tilt angle of the telescopic support component can be adaptively adjusted according to the support height, ensuring effective internal support for the foundation pit. During the height adjustment of the support frame 39, the positioning plate 37 rotates with the rotating seat I7, and the triangular positioning block 25 engages with the V-groove 24 to effectively lock the support cylinder 6 after angle adjustment, greatly improving the reliability of the foundation pit support.

[0032] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A replacement support device for internal support in a foundation pit, comprising a support base plate (1), wherein a vertical plate (2) is fixed on the support base plate (1), characterized in that, A horizontal sliding plate (4) is mounted on the supporting base plate (1). An adjustment assembly for driving the sliding plate (4) is mounted on the supporting base plate (1). A vertical sliding lifting plate (3) is mounted on the upright plate (2). A rotating shaft II (11) is rotatably mounted on the sliding plate (4). A rotating shaft I (10) is rotatably mounted on the lifting plate (3). Several equally spaced rotating seats I (7) are fixedly mounted on the rotating shaft II (11). Several equally spaced rotating seats I (7) are fixedly mounted on the rotating shaft I (10). The connecting seat II (9) and the rotating seat I (7) correspond one-to-one. The lifting plate (3) is equipped with a support frame (39). The connecting seat II (9) is slidably installed with a snap-fit ​​block II (34). The snap-fit ​​block II (34) is fixed with a fixed plate (33). The rotating seat I (7) is slidably installed with a snap-fit ​​block I (19). The snap-fit ​​block I (19) is rotatably installed with a rotating connecting component. The rotating connecting component and the snap-fit ​​block II (34) are connected with a telescopic support component.

2. The support replacement device for internal support in a foundation pit according to claim 1, characterized in that, The adjustment assembly includes a threaded rod (13) rotatably mounted on the support base plate (1), a sliding sleeve (14) fixed to the translation plate (4) is threaded onto the threaded rod (13), a bevel gear I (12) is fixedly sleeved onto the threaded rod (13), a bevel gear II (32) is meshed onto the bevel gear I (12), and a handwheel (15) is coaxially fixed onto the bevel gear II (32).

3. The support replacement device for internal support in a foundation pit according to claim 1, characterized in that, The rotary connection assembly includes a rotating column (27) rotatably mounted on the snap block I (19), with a docking plate II (18) fixed at the end of the rotating column (27). A docking plate I (17) is mounted on the docking plate II (18) by bolts and nuts (30), and the docking plate I (17) is fixed to the telescopic support assembly.

4. The support replacement device for internal support in a foundation pit according to claim 3, characterized in that, The telescopic support assembly includes a support cylinder (6) fixed on the docking plate I (17), an extension column (8) threadedly connected to the support cylinder (6), and a fixing plate (33) fixed at one end of the extension column (8) away from the support cylinder (6), and the fixing plate (33) fixed on the snap-fit ​​block II (34).

5. A replacement support device for internal support in a foundation pit according to claim 4, characterized in that, A screw ring (16) is fixed on the support cylinder (6), and a locking stud (29) that abuts against the extension column (8) is threaded onto the support cylinder (6).

6. The support replacement device for internal support in a foundation pit according to claim 1, characterized in that, The snap-fit ​​block I (19) is fixed with a limiting block (20) that is slidably embedded in the rotating seat I (7). The rotating seat I (7) is fixed with a sleeve (23). The sleeve (23) is slidably installed with an insert (21). The limiting block (20) is provided with an isosceles trapezoidal groove (28) that is adapted to the insert (21). The end of the insert (21) is provided with a wedge surface (35).

7. The support replacement device for internal support in a foundation pit according to claim 1, characterized in that, A positioning disk (37) is fixed on the rotating seat I (7), and a connecting seat I (5) is fixed on the translation plate (4). A triangular positioning block (25) is slidably installed on the connecting seat I (5). Several V-grooves (24) are circumferentially opened on the positioning disk (37). The triangular positioning block (25) is engaged with the V-grooves (24). A support spring (26) is fixed between the triangular positioning block (25) and the connecting seat I (5).

8. The support replacement device for internal support in a foundation pit according to claim 1, characterized in that, The upright plate (2) has a cavity (36) for the sliding extension of the lifting plate (3). The lifting plate (3) and the translation plate (4) are fixed with a connecting column (31). The upright plate (2) has a slide (38) that is adapted to the sliding of the connecting column (31).

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