A large-scale special-shaped deep foundation pit support device

Abstract

The invention relates to a supporting device, which belongs to the technical field of foundation pit engineering, and specifically to a large-scale special-shaped deep foundation pit supporting device, comprising a base plate, wherein the upper surface of the base plate is provided with two groups of positioning holes, and the two groups of positioning holes of the base plate are provided with mounting mechanisms for limiting the movement range of the base plate, a card slot is provided on the base plate, a slide plate is slidably connected to the inner wall of the card slot, a special-shaped limiting plate is provided on the back of the slide plate, a supporting mechanism for limiting the position of the special-shaped limiting plate is provided on the upper surface of the base plate, a limiting mechanism is provided on the upper surface of the supporting mechanism, and a protective mechanism is provided on the top of the inner wall of the mounting mechanism; the invention can improve the efficiency of installing the base plate, and at the same time provide sufficient supporting force for the special-shaped limiting plate, thereby improving the stability of the subsequent special-shaped limiting plate during use; and solves the problem that the existing deep foundation pit supporting device has insufficient support when dealing with the application of special-shaped guard plates, resulting in the easy movement of the subsequent special-shaped guard plates during use.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit engineering, in particular to a large-scale special-shaped deep foundation pit supporting device. Background Art

[0002] A deep foundation pit refers to a project with an excavation depth of more than 5 meters (including 5 meters), or a project with a depth of less than 5 meters but particularly complex geological conditions, surrounding environment and underground pipelines. In order to ensure the safety of construction and excavation, it is necessary to design a foundation pit support system according to the situation, and use the support system to support the foundation pit earth wall to prevent pipeline collapse and landslide problems.

[0003] In the prior art, a deep foundation pit support device disclosed in a Chinese patent with announcement number CN219118178U relates to the technical field of support devices, including a bottom plate, a fixing mechanism is provided on the bottom plate, a side plate is hinged on the bottom plate, an adjustment mechanism is provided on the bottom plate, a top plate is provided on the adjustment mechanism, the top plate is in contact with the side plate, and a telescopic mechanism is provided in the side plate. The patent provides a deep foundation pit support device, which is provided by providing a plug rod in the bottom plate, a screw rod is connected to the plug rod by threading, a slider is welded on the plug rod, and the screw rod and the plug rod are rotated to make a threaded movement, so that the plug rod is extended from the bottom plate, so that the bottom plate is placed stably on the ground, and relative displacement of the bottom plate is avoided.

[0004] However, this patent still has some shortcomings. In this patent, the deep foundation pit support devices used are mostly rectangular guard plates, which makes it impossible for the existing support mechanism to support the special-shaped guard plates during use, making it easy for subsequent special-shaped guard plates to move during use, thereby reducing the practicality of the equipment. Therefore, a large-scale special-shaped deep foundation pit support device is proposed to solve the above problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention proposes a large-scale special-shaped deep foundation pit support device, which can use an installation mechanism to install and position the base plate, reduce manpower consumption and improve the efficiency of installing the base plate, and at the same time provide sufficient supporting force for the special-shaped limiting plate to avoid subsequent movement of the special-shaped limiting plate during use, thereby improving the stability of the subsequent special-shaped limiting plate during use.

[0006] The technical solution to achieve the purpose of the present invention is: a large-scale special-shaped deep foundation pit support device, including a base plate, two groups of positioning holes are opened on the upper surface of the base plate, and the two groups of positioning holes of the base plate are provided with a mounting mechanism for limiting the movement range of the base plate. A card slot is opened on the base plate, and a slide is slidably connected to the inner wall of the card slot. A special-shaped limiting plate is arranged on the back of the slide, and a supporting mechanism for limiting the position of the special-shaped limiting plate is arranged on the upper surface of the base plate, a limiting mechanism is arranged on the upper surface of the supporting mechanism, and a protective mechanism is arranged on the top of the inner wall of the mounting mechanism.

[0007] In some embodiments, the mounting mechanism includes an L-shaped fixing plate and a fixing block, wherein the L-shaped fixing plate and the fixing block are both fixedly connected to the upper surface of the base plate, a through hole is opened on the side of the fixing block, and the inner wall of the through hole of the fixing block is rotatably connected to a fixing rod, and the outer surface of the fixing rod is fixedly connected to two groups of bevel gears 1, and the external teeth of the two groups of bevel gears 1 are meshed and connected with bevel gears 4, and the inner walls of the two groups of bevel gears 4 are fixedly connected to a rotating rod, a motor is provided at the top of the inner wall of the L-shaped fixing plate, the output shaft of the motor is fixedly connected to bevel gear 3, the external teeth of the bevel gear 3 are meshed and connected with bevel gear 2, and the inner wall of the bevel gear 2 is fixedly connected to the outer surface of the fixing rod, and the external threads of the two groups of rotating rods are connected to sliders, and the two groups of sliders are respectively slidably connected to the inner walls of the two groups of positioning holes of the base plate, and the lower surfaces of the two groups of sliders are fixedly connected to fixing sleeves, and the lower surfaces of the two groups of fixing sleeves are fixedly connected to triangular cones.

[0008] In some embodiments, the protective mechanism includes an L-shaped sliding plate and a side limiting plate, the side limiting plate is fixedly connected to the top of the inner wall of the L-shaped fixed plate, the lower surface of the side limiting plate is in contact with the upper surface of the bottom plate, a slot is provided at the top of the inner wall of the L-shaped fixed plate, the L-shaped sliding plate is slidably connected to the inner wall of the slot of the L-shaped fixed plate, the positions of the L-shaped sliding plate and the side limiting plate are respectively arranged at the left and right ends of the fixed rod, and the position of the side limiting plate is located on the moving path of the L-shaped sliding plate.

[0009] In some embodiments, a groove is formed on one side of the L-shaped sliding plate close to the fixed block, a magnetic block is disposed inside the groove, and the side limiting plate is made of metal iron.

[0010] In some embodiments, the support mechanism includes a support fixing plate, which is fixedly connected to the upper surface of the base plate, and the support fixing plate is positioned on the rear side of the L-shaped fixing plate. Two groups of connecting plates and a hydraulic cylinder are provided on the side of the support fixing plate close to the special-shaped limiting plate, and the output end of the hydraulic cylinder is installed on the front side of the special-shaped limiting plate. Two groups of threaded holes are opened on the front side of each group of the connecting plates, and the two groups of threaded holes of each group of the connecting plates are threadedly connected to limiting screws, and the back sides of the four groups of limiting screws are respectively fitted with the four end corners of the front side of the special-shaped limiting plate.

[0011] In some embodiments, the limiting mechanism includes a U-shaped fixing plate, which is fixedly connected to the upper surface of the supporting fixing plate, the inner wall of the U-shaped fixing plate is slidably connected to a top plate, a positioning block is provided on the back of the top plate, a threaded hole is provided on the upper surface of the positioning block, the internal thread of the positioning block is connected to a bolt, a threaded hole is provided on the upper surface of the special-shaped limiting plate, the external thread of the bolt passes through the threaded hole of the positioning block and is connected to the inside of the threaded hole of the special-shaped limiting plate, and the top plate is positioned at the upper end of the hydraulic cylinder.

[0012] In some embodiments, the outer surfaces of the four groups of limiting screws are all provided with fixing rings, and the sides of the four groups of fixing rings away from the special-shaped limiting plates are all provided with handles.

[0013] In some embodiments, an acrylic plate is provided on the upper surface of the L-shaped fixing plate, and the acrylic plate is positioned at the front end of the supporting mechanism. A control panel is provided on the front of the acrylic plate, and an electrical connection is established between the control panel and the control end of the hydraulic cylinder.

[0014] Compared with the prior art, the present invention has the following significant advantages:

[0015] First, the present invention drives the bevel gear three and the bevel gear two to rotate by starting the motor, so that the bevel gear two drives the fixing rod to rotate inside the through hole of the fixing block during the rotation process, and then the external teeth of the two sets of bevel gear one are meshed and connected with the bevel gear four, so that the subsequent fixing rod drives the two sets of rotating rods to rotate synchronously during the rotation process, and then the motor drives the two sets of rotating rods to trigger the two sets of sliders to slide inside the two sets of positioning holes of the bottom plate during the starting process, and the two sets of fixing sleeves are installed on the lower surfaces of the two sets of sliders, so that the two sets of sliders drive the two sets of triangular cones to drill into the inside of the ground at the lower end of the bottom plate during the movement, thereby completing the installation of the bottom plate; the installation mechanism is started instead of the staff manually positioning and installing the bottom plate, so that the labor and time consumed by the subsequent staff in the process of positioning and installing the bottom plate are reduced, thereby improving the practicality of the device during use;

[0016] Second: The present invention starts the hydraulic cylinder to push the special-shaped limit plate to move, so that the side of the special-shaped limit plate close to the foundation pit is abutted against the side wall of the foundation pit, and then by rotating four groups of limit screws, the back sides of the four groups of limit screws are abutted against the front side of the special-shaped limit plate, so that the four groups of limit screws limit the moving position of the four end corners of the special-shaped limit plate, and then the contact area between the supporting mechanism and the special-shaped limit plate is increased by the four groups of limit screws, so as to avoid the subsequent movement of the special-shaped limit plate during use, thereby improving the stability of the subsequent special-shaped limit plate during use.

[0017] The invention solves the problem that the existing deep foundation pit supporting device has insufficient support when dealing with the application of special-shaped guard plates, which causes the subsequent special-shaped guard plates to be easily moved during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments:

[0019] Figure 1 is a schematic diagram of the main structure provided in one embodiment of the present invention;

[0020] Figure 2 is a schematic diagram of a front plan structure provided in one embodiment of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of a triangular pyramid part (cross section) provided in one embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 1. Bottom plate; 2. Mounting mechanism; 201. L-shaped fixing plate; 202. Motor; 203. Fixing block; 204. Bevel gear one; 205. Bevel gear two; 206. Bevel gear three; 207. Fixing rod; 208. Bevel gear four; 209. Rotating rod; 210. Sliding block; 211. Fixing sleeve; 212. Triangular cone; 3. Protection mechanism; 301. L-shaped sliding plate; 302. Side limit plate; 4. Acrylic plate; 5. Magnetic block; 6. Support mechanism; 601. Support fixing plate; 602. Connecting plate; 603. Limiting screw; 604. Hydraulic cylinder; 7. Slide plate; 8. Special-shaped limit plate; 9. Control panel; 10. Limiting mechanism; 1001. U-shaped fixing plate; 1002. Top plate; 1003. Positioning block; 1004. Bolt; 11. Fixing ring; 12. Handle. DETAILED DESCRIPTION

[0024] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The present invention provides a large-scale special-shaped deep foundation pit support device through improvement. The technical solution of the present invention is:

[0026] like Figure 1-Figure 3 As shown, a large-scale special-shaped deep foundation pit support device includes a base plate 1, two groups of positioning holes are opened on the upper surface of the base plate 1, and a mounting mechanism 2 for limiting the moving range of the base plate 1 is arranged inside the two groups of positioning holes of the base plate 1, a card slot is opened on the base plate 1, a slide plate 7 is slidably connected to the inner wall of the card slot, a special-shaped limiting plate 8 is arranged on the back of the slide plate 7, a supporting mechanism 6 for limiting the position of the special-shaped limiting plate 8 is arranged on the upper surface of the base plate 1, a limiting mechanism 10 is arranged on the upper surface of the supporting mechanism 6, and a protective mechanism 3 is arranged on the top of the inner wall of the mounting mechanism 2.

[0027] Specifically, by starting the installation mechanism 2, the bottom end of the installation mechanism 2 is inserted into the ground at the lower end of the base plate 1, and then the installation mechanism 2 is started to replace the manual positioning and installation of the base plate 1 by the staff, so that the labor and time consumed by the subsequent staff in the process of positioning and installing the base plate 1 are reduced, thereby improving the practicality of the device during use.

[0028] like Figure 1-Figure 3 As shown, in one embodiment, the mounting mechanism 2 includes an L-shaped fixing plate 201 and a fixing block 203, both of which are fixedly connected to the upper surface of the bottom plate 1, a through hole is provided on the side of the fixing block 203, a fixing rod 207 is rotatably connected to the inner wall of the through hole of the fixing block 203, two sets of bevel gears 1 204 are fixedly connected to the outer surface of the fixing rod 207, the outer teeth of the two sets of bevel gears 1 204 are meshed and connected to bevel gears 4 208, the inner walls of the two sets of bevel gears 4 208 are fixedly connected to the rotating rod 209, the L-shaped fixing plate 201 A motor 202 is provided at the top of the inner wall, and the output shaft of the motor 202 is fixedly connected with a bevel gear three 206, and the external teeth of the bevel gear three 206 are meshedly connected with the bevel gear two 205, and the inner wall of the bevel gear two 205 is fixedly connected to the outer surface of the fixed rod 207, and the external threads of the two groups of rotating rods 209 are connected with sliders 210, and the two groups of sliders 210 are respectively slidably connected to the inner walls of the two groups of positioning holes of the bottom plate 1, and the lower surfaces of the two groups of sliders 210 are fixedly connected with fixed sleeves 211, and the lower surfaces of the two groups of fixed sleeves 211 are fixedly connected with triangular cones 212.

[0029] Specifically, the bevel gear three 206 and the bevel gear two 205 are driven to rotate by starting the motor 202, so that the bevel gear two 205 drives the fixed rod 207 to rotate inside the through hole of the fixed block 203 during the rotation process, and then the external teeth of the two groups of bevel gear one 204 are meshed and connected with the bevel gear four 208, so that the subsequent fixed rod 207 drives the two groups of rotating rods 209 to rotate synchronously during the rotation process, so that the motor 202 drives the two groups of rotating rods 209 to trigger the two groups of sliders 210 to slide inside the two groups of positioning holes of the bottom plate 1 during the startup process, and is installed on the lower surfaces of the two groups of sliders 210 through the two groups of fixing sleeves 211, so that the two groups of sliders 210 drive the two groups of triangular cones 212 to drill into the inside of the ground at the lower end of the bottom plate 1 during the movement, thereby completing the installation of the bottom plate 1; the installation mechanism 2 is started instead of the staff manually positioning and installing the bottom plate 1, so that the labor and time consumed by the subsequent staff in the process of positioning and installing the bottom plate 1 are reduced, thereby improving the practicality of the device during use.

[0030] like Figure 1 and Figure 2 As shown, in one embodiment, the protection mechanism 3 includes an L-shaped sliding plate 301 and a side limiting plate 302, the side limiting plate 302 is fixedly connected to the top of the inner wall of the L-shaped fixed plate 201, the lower surface of the side limiting plate 302 is in contact with the upper surface of the bottom plate 1, a card slot is provided on the top of the inner wall of the L-shaped fixed plate 201, the L-shaped sliding plate 301 is slidably connected to the inner wall of the card slot of the L-shaped fixed plate 201, the positions of the L-shaped sliding plate 301 and the side limiting plate 302 are respectively arranged at the left and right ends of the fixed rod 207, and the position of the side limiting plate 302 is located on the moving path of the L-shaped sliding plate 301;

[0031] Specifically, through the L-shaped sliding plate 301, the side of the L-shaped sliding plate 301 close to the fixed block 203 is abutted against the side of the side limit plate 302 close to the fixed block 203, so that the protection mechanism 3 can block the opening of the L-shaped fixed plate 201 during use, and then the protection mechanism 3 can shield and protect some parts and equipment of the installation mechanism 2 at the lower end of the L-shaped fixed plate 201, thereby minimizing damage to the subsequent installation mechanism 2 caused by collision with debris, thereby improving the service life of the subsequent installation mechanism 2.

[0032] like Figure 2 As shown, in one embodiment, a groove is provided on one side of the L-shaped sliding plate 301 close to the fixed block 203, a magnetic block 5 is provided inside the groove, and the side limit plate 302 is made of metal iron;

[0033] Specifically, by pushing the L-shaped sliding plate 301, the side of the magnetic block 5 close to the fixed block 203 is abutted against the side of the side limiting plate 302 close to the fixed block 203, so that the magnetic block 5 limits the moving position of the L-shaped sliding plate 301 inside the card slot of the L-shaped fixed plate 201, thereby minimizing the subsequent movement of the L-shaped sliding plate 301 during use.

[0034] like Figure 1 and Figure 2 As shown, in one embodiment, the support mechanism 6 includes a support fixing plate 601, which is fixedly connected to the upper surface of the base plate 1, and the support fixing plate 601 is arranged at the rear side of the L-shaped fixing plate 201. Two groups of connecting plates 602 and a hydraulic cylinder 604 are arranged on one side of the support fixing plate 601 close to the special-shaped limiting plate 8. The output end of the hydraulic cylinder 604 is installed on the front side of the special-shaped limiting plate 8. Two groups of threaded holes are opened on the front side of each group of connecting plates 602. The two groups of threaded holes of each group of connecting plates 602 are threadedly connected to the limiting screws 603. The backs of the four groups of limiting screws 603 are respectively fitted with the four end corners of the front side of the special-shaped limiting plate 8.

[0035] Specifically, when the base plate 1 is installed and positioned at the upper end of the ground, the hydraulic cylinder 604 is started to push the special-shaped limiting plate 8 to move, and the side of the special-shaped limiting plate 8 close to the foundation pit is abutted against the side wall of the foundation pit, and then the four groups of limiting screws 603 are rotated to abut the back of the four groups of limiting screws 603 against the front of the special-shaped limiting plate 8, so that the four groups of limiting screws 603 limit the movement position of the four end corners of the special-shaped limiting plate 8, and then the four groups of limiting screws 603 are used to increase the contact area between the support mechanism 6 and the special-shaped limiting plate 8, so as to avoid the subsequent movement of the special-shaped limiting plate 8 during use, thereby improving the stability of the subsequent special-shaped limiting plate 8 during use.

[0036] At the same time, the position of the special-shaped limiting plate 8 is synchronously positioned and installed on the side wall of the special-shaped foundation pit through four sets of limiting screws 603 and hydraulic cylinders 604, so that when the subsequent hydraulic cylinder 604 is damaged, the supporting mechanism 6 can support the position of the special-shaped limiting plate 8 through the four sets of limiting screws 603, thereby avoiding the movement of the position of the special-shaped limiting plate 8 when the subsequent hydraulic cylinder 604 is damaged, thereby improving the safety of the device during use.

[0037] like Figure 1 and Figure 2As shown, in one embodiment, the limiting mechanism 10 includes a U-shaped fixing plate 1001, which is fixedly connected to the upper surface of the supporting fixing plate 601, and the inner wall of the U-shaped fixing plate 1001 is slidably connected with a top plate 1002, and a positioning block 1003 is provided on the back of the top plate 1002, and a threaded hole is provided on the upper surface of the positioning block 1003, and a bolt 1004 is connected to the internal thread of the positioning block 1003, and a threaded hole is provided on the upper surface of the special-shaped limiting plate 8, and the external thread of the bolt 1004 passes through the threaded hole of the positioning block 1003 and is connected to the inside of the threaded hole of the special-shaped limiting plate 8, and the position of the top plate 1002 is set at the upper end of the hydraulic cylinder 604;

[0038] Specifically, the end of the top plate 1002 away from the U-shaped fixing plate 1001 is installed on the upper surface of the special-shaped limiting plate 8, so that the special-shaped limiting plate 8 can synchronously drive the top plate 1002 to move during the movement, and then the position of the top plate 1002 is set at the upper end of the hydraulic cylinder 604, so that the top plate 1002 shields and protects the hydraulic cylinder 604, thereby minimizing the possibility that the hydraulic cylinder 604 is hit by falling foreign objects during use and causes the hydraulic cylinder 604 to bend.

[0039] like Figure 2 As shown, in one embodiment, the outer surfaces of the four groups of limiting screws 603 are all provided with fixing rings 11, and the sides of the four groups of fixing rings 11 away from the special-shaped limiting plates 8 are all provided with handles 12;

[0040] Specifically, by pushing the four groups of handles 12, the four groups of fixed rings 11 are driven to accelerate and drive the four groups of limit screws 603 to rotate inside the two groups of threaded holes of the two groups of connecting plates 602, thereby reducing the labor consumed by subsequent staff in adjusting and moving the positions of the four groups of limit screws 603, thereby reducing the time consumed by subsequent staff in installing and positioning the special-shaped limit plates 8.

[0041] like Figure 1 and Figure 2 As shown, an acrylic plate 4 is disposed on the upper surface of the L-shaped fixing plate 201, and the acrylic plate 4 is disposed at the front end of the supporting mechanism 6. A control panel 9 is disposed on the front of the acrylic plate 4, and an electrical connection is made between the control panel 9 and the control end of the hydraulic cylinder 604;

[0042] Specifically, the hydraulic cylinder 604 is started by operating the control panel 9, and the control panel 9 is positioned on the side of the acrylic plate 4 away from the supporting mechanism 6, so that the staff does not need to have close contact with the foundation pit when opening the supporting mechanism 6 to support the special-shaped limiting plate 8, thereby improving the safety of subsequent staff when installing and positioning the special-shaped limiting plate 8; because the material of the acrylic plate 4 is a transparent material, the staff can observe the state of the foundation pit slope during the process of operating the control panel 9 to start the supporting mechanism 6 to install the special-shaped limiting plate 8, and then the staff can escape in time when the subsequent foundation pit slope collapses, thereby improving the safety of subsequent staff when installing the special-shaped limiting plate 8.

[0043] The specific working method is as follows: when the large-scale special-shaped deep foundation pit supporting device is used, the bevel gear three 206 and the bevel gear two 205 are driven to rotate by starting the motor 202, so that the bevel gear two 205 drives the fixing rod 207 to rotate inside the through hole of the fixing block 203 during the rotation, and then the external teeth of the two sets of bevel gear one 204 are meshed and connected with the bevel gear four 208, so that the subsequent fixing rod 207 drives the two sets of rotating rods 209 to rotate synchronously during the rotation, and then the motor 202 drives the two sets of rotating rods 209 to trigger the two sets of sliders 210 to slide inside the two sets of positioning holes of the bottom plate 1 during the startup process, and through the two sets of A set of fixing sleeves 211 are installed on the lower surfaces of the two sets of sliders 210, so that the two sets of sliders 210 drive the two sets of triangular cones 212 to drill into the ground at the lower end of the base plate 1 during movement, thereby completing the installation of the base plate 1; by pushing the L-shaped sliding plate 301, the side of the L-shaped sliding plate 301 close to the fixed block 203 is abutted against the side of the side limit plate 302 close to the fixed block 203, so that the protection mechanism 3 blocks the opening of the L-shaped fixing plate 201 during use, and then the protection mechanism 3 blocks and protects some parts and equipment of the installation mechanism 2 at the lower end of the L-shaped fixing plate 201, thereby minimizing damage to the subsequent installation mechanism 2 caused by collision with debris.

[0044] At the same time, the hydraulic cylinder 604 is started to push the special-shaped limit plate 8 to move, and the side of the special-shaped limit plate 8 close to the foundation pit is abutted against the side wall of the foundation pit, and then the four sets of limit screws 603 are rotated to abut the back of the four sets of limit screws 603 against the front of the special-shaped limit plate 8, so that the four sets of limit screws 603 limit the movement position of the four end corners of the special-shaped limit plate 8, and then the four sets of limit screws 603 are used to increase the contact area between the support mechanism 6 and the special-shaped limit plate 8, so as to avoid the subsequent movement of the special-shaped limit plate 8 during use. , thereby improving the stability of the subsequent special-shaped limiting plate 8 during use; the top plate 1002 is installed on the upper surface of the special-shaped limiting plate 8 at one end away from the U-shaped fixing plate 1001, so that the special-shaped limiting plate 8 can synchronously drive the top plate 1002 to move during the movement, and then the position of the top plate 1002 is set at the upper end of the hydraulic cylinder 604, so that the top plate 1002 shields and protects the hydraulic cylinder 604, thereby minimizing the subsequent hydraulic cylinder 604 from being hit by falling foreign objects during use, causing the hydraulic cylinder 604 to bend.

[0045] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above technical means, but also include technical solutions composed of equivalent replacement of the above technical features. Matters not covered in the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A large-scale special-shaped deep foundation pit support device, comprising a bottom plate (1), characterized in that: The upper surface of the base plate (1) is provided with two groups of positioning holes, and a mounting mechanism (2) for limiting the movement range of the base plate (1) is arranged inside the two groups of positioning holes of the base plate (1); a card slot is provided on the base plate (1), and a slide plate (7) is slidably connected to the inner wall of the card slot, and a special-shaped limiting plate (8) is arranged on the back of the slide plate (7); a supporting mechanism (6) for limiting the position of the special-shaped limiting plate (8) is arranged on the upper surface of the base plate (1), and a limiting mechanism (10) is arranged on the upper surface of the supporting mechanism (6); and a protective mechanism (3) is arranged on the top of the inner wall of the mounting mechanism (2); The mounting mechanism (2) comprises an L-shaped fixing plate (201) and a fixing block (203); the L-shaped fixing plate (201) and the fixing block (203) are both fixedly connected to the upper surface of the bottom plate (1); a through hole is provided on the side of the fixing block (203); a fixing rod (207) is rotatably connected to the inner wall of the through hole of the fixing block (203); two sets of bevel gears (204) are fixedly connected to the outer surface of the fixing rod (207); the outer teeth of the two sets of bevel gears (204) are meshedly connected to bevel gears (208); the inner walls of the two sets of bevel gears (208) are fixedly connected to rotating rods (209); the inner wall of the L-shaped fixing plate (201) is A motor (202) is arranged at the top, the output shaft of the motor (202) is fixedly connected to a bevel gear three (206), the external teeth of the bevel gear three (206) are meshedly connected to a bevel gear two (205), the inner wall of the bevel gear two (205) is fixedly connected to the outer surface of a fixed rod (207), the external threads of the two groups of rotating rods (209) are connected to sliders (210), the two groups of sliders (210) are respectively slidably connected to the inner walls of the two groups of positioning holes of the bottom plate (1), the lower surfaces of the two groups of sliders (210) are fixedly connected to fixed sleeves (211), and the lower surfaces of the two groups of fixed sleeves (211) are fixedly connected to triangular cones (212); The protection mechanism (3) comprises an L-shaped sliding plate (301) and a side limiting plate (302), wherein the side limiting plate (302) is fixedly connected to the top of the inner wall of the L-shaped fixed plate (201), the lower surface of the side limiting plate (302) is in contact with the upper surface of the bottom plate (1), the top of the inner wall of the L-shaped fixed plate (201) is provided with a slot, the L-shaped sliding plate (301) is slidably connected to the inner wall of the slot of the L-shaped fixed plate (201), the positions of the L-shaped sliding plate (301) and the side limiting plate (302) are respectively arranged at the left and right ends of the fixed rod (207), and the position of the side limiting plate (302) is located on the moving path of the L-shaped sliding plate (301); A groove is provided on one side of the L-shaped sliding plate (301) close to the fixed block (203), a magnetic block (5) is arranged inside the groove, and the side limit plate (302) is made of metal iron; The support mechanism (6) comprises a support fixing plate (601), the support fixing plate (601) being fixedly connected to the upper surface of the bottom plate (1), the support fixing plate (601) being arranged at the rear side of the L-shaped fixing plate (201), two groups of connecting plates (602) and a hydraulic cylinder (604) being arranged on one side of the support fixing plate (601) close to the special-shaped limiting plate (8), the output end of the hydraulic cylinder (604) being mounted on the front side of the special-shaped limiting plate (8), two groups of threaded holes being arranged on the front side of each group of connecting plates (602), the two groups of threaded holes of each group of connecting plates (602) being threadedly connected to the limiting screws (603), and the back sides of the four groups of limiting screws (603) being respectively fitted with the four end corners of the front side of the special-shaped limiting plate (8); The limiting mechanism (10) comprises a U-shaped fixing plate (1001), the U-shaped fixing plate (1001) being fixedly connected to the upper surface of the supporting fixing plate (601), the inner wall of the U-shaped fixing plate (1001) being slidably connected to a top plate (1002), a positioning block (1003) being arranged on the back side of the top plate (1002), a threaded hole being arranged on the upper surface of the positioning block (1003), a bolt (1004) being connected to the inner thread of the positioning block (1003), a threaded hole being arranged on the upper surface of the special-shaped limiting plate (8), the outer thread of the bolt (1004) passing through the threaded hole of the positioning block (1003) being connected to the inner thread of the threaded hole of the special-shaped limiting plate (8), and the top plate (1002) being arranged at the upper end of the hydraulic cylinder (604).

2. A large-scale special-shaped deep foundation pit support device according to claim 1, characterized in that: The outer surfaces of the four groups of limiting screws (603) are all provided with fixing rings (11), and the sides of the four groups of fixing rings (11) away from the special-shaped limiting plates (8) are all provided with handles (12).

3. A large-scale special-shaped deep foundation pit support device according to claim 1, characterized in that: An acrylic plate (4) is provided on the upper surface of the L-shaped fixing plate (201); the acrylic plate (4) is arranged at the front end of the supporting mechanism (6); a control panel (9) is provided on the front of the acrylic plate (4); and an electrical connection is established between the control panel (9) and the control end of the hydraulic cylinder (604).

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