Deep foundation pit construction supporting device and supporting method thereof

Abstract

The invention discloses a deep foundation pit construction supporting device and a supporting method thereof.The deep foundation pit construction supporting device comprises a foundation pit, supporting plates are arranged on the four sides of the interior of the foundation pit, and a supporting column is installed in the middle of the bottom end of the interior of the foundation pit. By arranging the fixing mechanism, the supporting column is fixedly supported in the middle of the bottom end of the interior of the foundation pit, then through the cooperation effect of the supporting plates and the supporting mechanism, four sets of clamping blocks are clamped into clamping grooves formed in the four sets of supporting plates correspondingly, the foundation pit is supported, and collapse of the foundation pit is prevented; the foundation pit supporting device is suitable for supporting foundation pits with different depths and different sizes, practicability and applicability are improved, in addition, the first auxiliary mechanism and the second auxiliary mechanism are arranged for cooperation, the foundation pit supporting device is suitable for the foundation pits with different depths, workers are automatically conveyed to the bottom end positions in the foundation pits from the tops of the foundation pits, and the working efficiency is improved. And a worker can conveniently inspect or construct the interior of the foundation pit, and convenience and rapidness are achieved.

Description

Technical Field

[0001] This invention relates to the field of foundation pit construction support technology, specifically to a deep foundation pit construction support device and its support method. Background Technology

[0002] When constructing a building, the first step is to excavate a foundation pit. A deep foundation pit is defined as one with an excavation depth exceeding five meters. Foundation pit support is a set of measures to support, reinforce, and protect the sidewalls of the foundation pit in order to ensure the safety of the underground structure construction and the surrounding environment. During the construction of the foundation pit, foundation pit support devices are required to support the sidewalls of the foundation pit.

[0003] The existing foundation pit support structure includes a protective plate that is attached to and supports the sidewall of the foundation pit, and a support rod installed between the protective plate and the bottom of the foundation pit. The protective plate is pressed tightly against the sidewall of the foundation pit by the inclined support rod, thereby reinforcing the sidewall of the foundation pit. The two ends of the support rod in this support structure need to be connected to the protective plate and the bottom of the foundation pit respectively. Not only is the connection process cumbersome and labor-intensive, but it is also unable to support foundation pits of different depths and sizes, reducing its practicality and applicability. Summary of the Invention

[0004] To solve the above-mentioned technical problems, a deep foundation pit construction support device and its support method are provided. This technical solution solves the problems mentioned in the background technology.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A deep foundation pit construction support device includes a foundation pit, with support plates installed on all four sides of the interior of the foundation pit. A support column is installed at the middle position of the bottom of the interior of the foundation pit. Three sets of fixing mechanisms are installed on the bottom of the outer surface of the support column to fix the support column inside the foundation pit. Four sets of support mechanisms are installed on the top of the outer surface of the support column to support the support plates on the inner side of the foundation pit. A first auxiliary mechanism is connected to the top of the support column. A second auxiliary mechanism is also installed inside the support column. The first and second auxiliary mechanisms work together to send workers into the foundation pit for construction or to send them out of the foundation pit.

[0006] Preferably, the fixing mechanism includes a first fixing frame welded to the outer wall of the support column, a first motor fixedly connected to the outer wall of the first fixing frame, the output end of the first motor extending into the first fixing frame and fixedly connected to the rotating cylinder, and a lifting plate being provided inside the rotating cylinder.

[0007] Preferably, the fixing mechanism further includes a first lead screw and a first guide rod. The first lead screw is rotatably connected inside the rotating cylinder, and the first guide rod is fixedly connected inside the rotating cylinder. The outer end of the first lead screw is fixedly connected to the output end of the first stepper motor. The first stepper motor is located at the top of the rotating cylinder, and the lifting plate is threadedly connected to the outer wall of the first lead screw. The lifting plate is slidably connected to the first guide rod, and a second motor is fixedly installed at the top of the lifting plate. The output end of the second motor is fixedly connected to the drill bit.

[0008] Preferably, the support mechanism includes a second fixed frame fixedly installed on the outer wall of the support column. A threaded rod is rotatably connected inside the second fixed frame. The threads at both ends of the threaded rod have opposite directions, and both ends of the outer wall of the threaded rod are threadedly connected to movable frames. The interiors of the two sets of movable frames are rotatably connected to one end of the first scissor telescopic member. A fixed rod is also welded inside the second fixed frame, and the movable frames are slidably connected to the fixed rod.

[0009] Preferably, a servo motor for driving the threaded rod to rotate is provided on the outer wall of the second fixed frame. The other two ends of the first scissor telescopic member are rotatably connected to the inside of two sets of sliding frames. Both sets of sliding frames are slidably mounted on the connecting rod. The connecting rod is fixedly mounted inside the mounting frame. A locking block is also fixedly connected to the outside of the mounting frame. A slot adapted to the locking block is opened on the inner side of the support plate.

[0010] Preferably, the first auxiliary mechanism includes a third fixed frame, a second sleeve, a third sleeve, and a fourth sleeve. The third fixed frame is welded to the top of the support column. The first sleeve is rotatably connected inside the third fixed frame. The rotation of the first sleeve is driven by a third motor located outside the third fixed frame. The second, third, and fourth sleeves are all slidably connected inside the first sleeve. A first frame is welded to the outer end of the fourth sleeve. A first rotating plate is rotatably connected inside the first frame. An electric push rod is located on the top of the first rotating plate. The output end of the electric push rod is fixedly connected to a first receiving frame. A fourth motor that drives the first rotating plate to rotate is located on the outer wall of the first frame.

[0011] Preferably, the first auxiliary mechanism further includes two sets of connecting blocks fixedly installed on the outer wall of the first sleeve. A second lead screw is rotatably connected between the two sets of connecting blocks. A second frame is threadedly connected to the outer surface of the second lead screw. The second frame is slidably connected to the second guide rod. The two ends of the second guide rod are respectively fixedly connected to the inner walls of the two sets of connecting blocks. A second stepper motor for driving the second lead screw to rotate is provided at the bottom of one set of connecting blocks. A second receiving frame is rotatably connected inside the second frame. The rotation of the second receiving frame is driven by a fifth motor provided on the outside of the second frame.

[0012] Preferably, a third stepper motor is fixedly installed inside the first sleeve, and the output end of the third stepper motor is fixedly connected to a third lead screw. A third guide rod is also fixedly connected inside the first sleeve, and a lifting frame is slidably connected to the third guide rod. The lifting frame is threadedly connected to the third lead screw. A second scissor-type telescopic component is rotatably installed inside the lifting frame. The bottom two ends of the second scissor-type telescopic component are rotatably connected to the bottom end inside the first sleeve, and the top two ends of the second scissor-type telescopic component are rotatably connected to the top end inside the fourth sleeve. Limiting grooves are formed on the inner walls of both the third and fourth sleeves. A limiting slide rod is connected to the second scissor-type telescopic component, and the limiting slide rod is slidably connected inside the limiting groove.

[0013] Preferably, the second auxiliary mechanism includes a fourth stepper motor fixedly installed at the bottom of the inside of the support column. The output end of the fourth stepper motor is fixedly connected to a fourth lead screw. A support plate is threadedly connected to the outer wall of the fourth lead screw. The support plate is slidably connected to a fourth guide rod. The fourth guide rod is welded to the inside of the support column, and an outlet is provided through the bottom of the outer wall of the support column.

[0014] A method for supporting deep foundation pit construction includes: S1. The support column is lifted by a crane and kept vertical. The support column is lifted to the middle position of the bottom of the foundation pit. The output ends of the three sets of first motors are controlled to rotate, causing the three sets of rotating cylinders to rotate. This changes the tilt angle of the three sets of rotating cylinders. Under the action of the output ends of the first motors installed inside each cylinder, the lifting plate moves downward along the outer wall of the first guide rod, and then the drill bit moves downward. At the same time, the output end of the second motor is driven to rotate, causing the drill bit to rotate and drive the drill bit into the ground. This fixes the support column in the bottom of the foundation pit, and the support column is also in a vertical position at this time. S2. Based on the size of the inner side of the foundation pit, select four sets of support plates that are suitable for the size of the inner side wall of the foundation pit, and place them in sequence on the inner side wall of the foundation pit. Then, control the output end of the corresponding servo motor to rotate, which drives the threaded rod to rotate. This causes the two sets of movable frames to move closer to each other along the outer wall of the fixed rod, and the two sets of sliding frames to also move closer to each other. This enables the first scissor telescopic component to be in the extended state, and causes the four sets of locking blocks to be locked into the slots opened on the four sets of support plates, thereby supporting the foundation pit and preventing the foundation pit from collapsing. S3. By controlling the output of the third motor to rotate, the first sleeve, second sleeve, third sleeve and fourth sleeve are rotated as a whole. Then, by controlling the output of the third stepper motor to rotate, the third lead screw is rotated, which moves the lifting frame upward. The second scissor telescopic component is in the extended state, which enables the second sleeve, third sleeve and fourth sleeve to extend synchronously from the first sleeve, which enables the first frame, first rotating plate and first receiving frame to move upward as a whole. Then, in conjunction with the output of the fourth motor to rotate, the first rotating plate and first receiving frame are rotated as a whole. The first rotating plate and first receiving frame are in a horizontal state and are located at the edge of the top of the pit. The workers stand inside the first receiving frame and hold the edge of the first receiving frame with their hands. The second frame and the second receiving frame are located at the top of the first sleeve and are in a horizontal state. By controlling the output end of the electric push rod to extend, the first receiving frame moves towards the second receiving frame. The worker walks out of the first receiving frame and enters the interior of the second receiving frame. Then, the output end of the second stepper motor drives the second lead screw to rotate, so that the second frame and the second receiving frame move downward along the outer wall of the second guide rod to the bottom of the first sleeve. The support plate is located at the top of the inside of the support column. The worker walks out from the second support frame and stands on top of the support plate. By controlling the output end of the fourth stepper motor to rotate, the fourth lead screw is driven to rotate, causing the support plate to move downward along the outer wall of the fourth guide rod. Afterward, the worker walks out of the support column through the exit and reaches the bottom of the pit. Then, the worker can inspect or carry out construction inside the pit. This method is suitable for pits of different depths and can automatically send workers to the bottom of the pit, which is convenient and fast.

[0015] Compared with the prior art, the present invention provides a deep foundation pit construction support device and support method, which has the following beneficial effects: This invention features a fixing mechanism that secures the support column at the bottom center of the foundation pit. The combination of a support plate and a supporting mechanism allows four sets of locking blocks to engage with slots on the four support plates, thus supporting the foundation pit and preventing collapse. It is suitable for supporting foundation pits of varying depths and sizes, improving practicality and applicability. Furthermore, the invention includes a first auxiliary mechanism and a second auxiliary mechanism that work together to automatically transport workers from the top of the pit to the bottom, facilitating inspection and construction within the pit, making the process convenient and efficient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the support plate in this invention; Figure 3 This is a schematic diagram of the outer structure of the pillar in this invention; Figure 4 This is a schematic diagram of the fixing mechanism in this invention; Figure 5 This is a schematic diagram of the internal structure of the rotating cylinder in this invention; Figure 6 This is a schematic diagram of the support mechanism in this invention; Figure 7 This is a schematic diagram of the structure of the first auxiliary mechanism in this invention; Figure 8 This is a schematic diagram of the outer structure of the first sleeve in this invention; Figure 9 This is a schematic diagram of the internal structure of the fourth sleeve in this invention; Figure 10 This is a schematic diagram of the internal structure of the first sleeve in this invention; Figure 11 This is a schematic diagram of the structure of the second auxiliary mechanism in this invention.

[0017] The numbers on the map are: 1. Excavation pit; 101. Support plate; 102. Slot; 103. Support column; 104. Exit; 2. Fixing mechanism; 201. First fixing frame; 202. First electric motor; 203. Rotating cylinder; 204. First lead screw; 205. First guide rod; 206. First stepper motor; 207. Lifting plate; 208. Second electric motor; 209. Drill bit; 3. Support mechanism; 301. Second fixed frame; 302. Threaded rod; 303. Fixed rod; 304. Servo motor; 305. Movable frame; 306. First scissor telescopic component; 307. Mounting frame; 308. Connecting rod; 309. Sliding frame; 310. Locking block; 4. First auxiliary mechanism; 401. Third fixed frame; 402. Third motor; 403. First sleeve; 404. Second sleeve; 405. Third sleeve; 406. Fourth sleeve; 407. First frame; 408. Fourth motor; 409. First rotating plate; 410. Electric push rod; 411. First receiving frame; 412. Connecting block; 413. Second lead screw; 414. Second guide rod; 415. Second stepper motor; 416. Second frame; 417. Fifth motor; 418. Second receiving frame; 419. Third stepper motor; 420. Third lead screw; 421. Third guide rod; 422. Lifting frame; 423. Second scissor telescopic component; 424. Limiting slide groove; 425. Limiting slide rod; 5. Second auxiliary mechanism; 501. Fourth stepper motor; 502. Fourth lead screw; 503. Fourth guide rod; 504. Support plate. Detailed Implementation

[0018] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0019] Example 1 Please refer to Figures 1-11 As shown, a deep foundation pit construction support device includes a foundation pit 1. Support plates 101 are provided on all four sides of the interior of the foundation pit 1. A column 103 is installed at the middle position of the bottom of the interior of the foundation pit 1. Three sets of fixing mechanisms 2 are installed on the bottom of the outer surface of the column 103. The fixing mechanisms 2 are used to fix the column 103 inside the foundation pit 1. Four sets of support mechanisms 3 are provided on the top of the outer surface of the column 103. The support mechanisms 3 are used to support the support plates 101 on the inner side of the foundation pit 1. A first auxiliary mechanism 4 is connected to the top of the column 103. A second auxiliary mechanism 5 is also provided inside the column 103. The first auxiliary mechanism 4 and the second auxiliary mechanism 5 work together to send workers into the foundation pit 1 for construction or to send them out of the foundation pit 1.

[0020] Example 2 Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the fixing mechanism 2 includes a first fixing frame 201 welded to the outer wall of the support column 103. A first motor 202 is fixedly connected to the outer wall of the first fixing frame 201. The output end of the first motor 202 extends into the first fixing frame 201 and is fixedly connected to the rotating cylinder 203. A lifting plate 207 is provided inside the rotating cylinder 203.

[0021] Please refer to Figure 5 As shown, the fixing mechanism 2 also includes a first lead screw 204 and a first guide rod 205. The first lead screw 204 is rotatably connected to the inside of the rotating cylinder 203, and the first guide rod 205 is fixedly connected to the inside of the rotating cylinder 203. The outer end of the first lead screw 204 is fixedly connected to the output end of the first stepper motor 206. The first stepper motor 206 is located at the top of the rotating cylinder 203, and the lifting plate 207 is threadedly connected to the outer wall of the first lead screw 204. The lifting plate 207 is slidably connected to the first guide rod 205. A second motor 208 is fixedly installed on the top of the lifting plate 207, and the output end of the second motor 208 is fixedly connected to the drill bit 209.

[0022] Those skilled in the art will understand that the angle between the three sets of rotating cylinders 203 is 120 degrees. By controlling the output end of the first motor 202 to rotate, the rotating cylinders 203 rotate, changing the tilt angle of the rotating cylinders 203. Then, under the action of the output end of the first step motor 206, the lifting plate 207 moves downward along the outer wall of the first guide rod 205, thereby causing the drill bit 209 to move downward. At the same time, the output end of the second motor 208 is driven to rotate, causing the drill bit 209 to rotate, thus driving the drill bit 209 into the ground, thereby fixing the support column 103 to the bottom of the pit 1.

[0023] Example 3 Please refer to Figure 6 As shown, the support mechanism 3 includes a second fixed frame 301 fixedly installed on the outer wall of the support column 103. A threaded rod 302 is rotatably connected inside the second fixed frame 301. The threads at both ends of the threaded rod 302 have opposite directions of rotation, and both ends of the outer wall of the threaded rod 302 are threadedly connected to movable frames 305. The interiors of the two sets of movable frames 305 are rotatably connected to one end of the first scissor telescopic member 306. A fixed rod 303 is also welded inside the second fixed frame 301. The movable frames 305 are slidably connected to the fixed rod 303.

[0024] Please refer to Figure 6 As shown, a servo motor 304 for driving the threaded rod 302 to rotate is provided on the outer wall of the second fixed frame 301. The other two ends of the first scissor telescopic member 306 are rotatably connected to the inside of the two sets of sliding frames 309. The two sets of sliding frames 309 are slidably mounted on the connecting rod 308. The connecting rod 308 is fixedly mounted inside the mounting frame 307. A locking block 310 is also fixedly connected to the outside of the mounting frame 307. A slot 102 that matches the locking block 310 is opened on the inner side of the support plate 101.

[0025] Those skilled in the art will understand that the output end of the servo motor 304 drives the threaded rod 302 to rotate, causing the two sets of movable frames 305 to move closer or further apart along the outer wall of the fixed rod 303. When the two sets of movable frames 305 move closer together, the two sets of sliding frames 309 also move closer together, thus enabling the first scissor-type telescopic member 306 to be in an extended state. When the two sets of movable frames 305 move further apart, the two sets of sliding frames 309 also move further apart, thus enabling the first scissor-type telescopic member 306 to be in a retracted state, thereby enabling the locking block 310 to move towards or away from the inner wall of the pit 1. In summary, when supporting the interior of the foundation pit 1, the present invention places support plates 101 on the four sides inside the foundation pit 1. Through the aforementioned support mechanism 3, the locking blocks 310 extend into the slots 102 opened on the support plates 101, and the support plates 101 abut against the inner wall of the foundation pit 1 to achieve support and prevent the foundation pit 1 from collapsing. Different foundation pits 1 have different interior depths, so only support plates 101 of different heights need to be placed. Moreover, the height of the slots 102 opened on the support plates 101 of different heights is fixed because the height of the locking blocks 310 in the support mechanism 3 is fixed. Therefore, the present invention is applicable to supporting the interior of foundation pits 1 of different depths and sizes, improving the practicality and applicability of the device. Furthermore, when the device is not in use, all four sets of first scissor telescopic components 306 are in a fully retracted state, reducing the overall volume of the device.

[0026] Example 4 Please refer to Figure 7 and Figure 8 As shown, the first auxiliary mechanism 4 includes a third fixed frame 401, a second sleeve 404, a third sleeve 405, and a fourth sleeve 406. The third fixed frame 401 is welded to the top of the support column 103. The first sleeve 403 is rotatably connected inside the third fixed frame 401. The rotation of the first sleeve 403 is driven by a third motor 402 provided on the outside of the third fixed frame 401. The second sleeve 404, the third sleeve 405, and the fourth sleeve 406 are all slidably connected inside the first sleeve 403. A first frame 407 is welded to the outer end of the fourth sleeve 406. A first rotating plate 409 is rotatably connected inside the first frame 407. An electric push rod 410 is provided on the top of the first rotating plate 409. The output end of the electric push rod 410 is fixedly connected to the first receiving frame 411. A fourth motor 408 is provided on the outer wall of the first frame 407 to drive the first rotating plate 409 to rotate.

[0027] Please refer to Figure 8 As shown, the first auxiliary mechanism 4 also includes two sets of connecting blocks 412 fixedly installed on the outer wall of the first sleeve 403. A second lead screw 413 is rotatably connected between the two sets of connecting blocks 412. A second frame 416 is threadedly connected to the outer surface of the second lead screw 413. The second frame 416 is slidably connected to the second guide rod 414. The two ends of the second guide rod 414 are fixedly connected to the inner walls of the two sets of connecting blocks 412 respectively. A second stepper motor 415 is provided at the bottom of one set of connecting blocks 412 to drive the second lead screw 413 to rotate. A second receiving frame 418 is rotatably connected inside the second frame 416. The rotation of the second receiving frame 418 is driven by a fifth motor 417 provided on the outside of the second frame 416.

[0028] Please refer to Figure 9 and Figure 10As shown, a third stepper motor 419 is fixedly installed inside the first sleeve 403. The output end of the third stepper motor 419 is fixedly connected to the third lead screw 420. A third guide rod 421 is also fixedly connected inside the first sleeve 403. A lifting frame 422 is slidably connected to the third guide rod 421. The lifting frame 422 is threadedly connected to the third lead screw 420. A second scissor telescopic component 423 is rotatably installed inside the lifting frame 422. The bottom two ends of the second scissor telescopic component 423 are rotatably connected to the bottom end inside the first sleeve 403. The top two ends of the second scissor telescopic component 423 are rotatably connected to the top end inside the fourth sleeve 406. Limiting grooves 424 are opened on the inner walls of the third sleeve 405 and the fourth sleeve 406. A limiting slide rod 425 is connected to the second scissor telescopic component 423. The limiting slide rod 425 is slidably connected inside the limiting groove 424.

[0029] Those skilled in the art will understand that by controlling the output of the third stepper motor 419 to rotate, the third lead screw 420 is rotated, causing the lifting frame 422 to move up and down along the outer wall of the third guide rod 421. When the lifting frame 422 moves upward, the second scissor telescopic member 423 is in an extended state, which enables the second sleeve 404, the third sleeve 405, and the fourth sleeve 406 to extend synchronously from the first sleeve 403. When the lifting frame 422 moves downward, the second scissor telescopic member 423 is in a retracted state, which enables the second sleeve 404, the third sleeve 405, and the fourth sleeve 406 to retract synchronously into the first sleeve 403. This enables the first frame 407, the first rotating plate 409, and the first receiving frame 411 to move upward or downward as a whole. By controlling the output of the fourth motor 408 to rotate, the first rotating plate 409 and the first receiving frame 411 are rotated as a whole. The output of the second stepper motor 415 drives the second lead screw 413 to rotate, causing the second frame 416 and the second receiving frame 418 to move up and down along the outer wall of the second guide rod 414. The output of the fifth motor 417 is controlled to rotate, thereby driving the second receiving frame 418 to rotate. By controlling the output of the third motor 402 to rotate, the first sleeve 403, the second sleeve 404, the third sleeve 405 and the fourth sleeve 406 are rotated as a whole. When the device is not in use, the first sleeve 403 remains horizontal, and the second sleeve 404, the third sleeve 405 and the fourth sleeve 406 are completely retracted into the first sleeve 403, thereby further reducing the overall volume.

[0030] Example 5 Please refer to Figure 11As shown, the second auxiliary mechanism 5 includes a fourth stepper motor 501 fixedly installed at the bottom of the inside of the support column 103. The output end of the fourth stepper motor 501 is fixedly connected to the fourth lead screw 502. The outer wall of the fourth lead screw 502 is threadedly connected to a support plate 504. The support plate 504 is slidably connected to the fourth guide rod 503. The fourth guide rod 503 is welded to the inside of the support column 103, and an outlet 104 is provided through the bottom of the outer wall of the support column 103.

[0031] Those skilled in the art will understand that by controlling the output end of the fourth stepper motor 501 to rotate, the fourth lead screw 502 is driven to rotate, causing the support plate 504 to move up and down along the outer wall of the fourth guide rod 503.

[0032] The method of using this invention is as follows: S1. The support column 103 is lifted by a crane and kept vertical. The support column 103 is lifted to the middle position of the bottom of the foundation pit 1. The output ends of the three sets of first motors 202 are controlled to rotate, causing the three sets of rotating cylinders 203 to rotate. This changes the tilt angle of the three sets of rotating cylinders 203. Under the action of the output end of the first step motor 206 installed inside each cylinder, the lifting plate 207 moves downward along the outer wall of the first guide rod 205. This causes the drill bit 209 to move downward and simultaneously drives the output end of the second motor 208 to rotate, causing the drill bit 209 to rotate and drive the drill bit 209 into the ground. This fixes the support column 103 to the bottom of the foundation pit 1. At this time, the support column 103 is also in a vertical state. S2. Based on the size of the inner side of the foundation pit 1, select four sets of support plates 101 that are suitable for the size of the inner side of the foundation pit 1, and place them in sequence on the four inner side walls of the foundation pit 1. Then, control the output end of the corresponding servo motor 304 to rotate, which drives the threaded rod 302 to rotate. This causes the two sets of movable frames 305 to move closer to each other along the outer wall of the fixed rod 303, and the two sets of sliding frames 309 to also move closer to each other. This enables the first scissor telescopic component 306 to be in the extended state, which drives the four sets of locking blocks 310 to be locked into the slots 102 opened on the four sets of support plates 101, thereby supporting the foundation pit 1 and preventing the foundation pit 1 from collapsing. S3. By controlling the output of the third motor 402 to rotate, the first sleeve 403, the second sleeve 404, the third sleeve 405 and the fourth sleeve 406 are rotated as a whole. Then, by controlling the output of the third stepper motor 419 to rotate, the third lead screw 420 is rotated, which causes the lifting frame 422 to move upward. The second scissor telescopic component 423 is in the extended state, which causes the second sleeve 404, the third sleeve 405 and the fourth sleeve 406 to extend synchronously from the first sleeve 403, which causes the first frame 407, the first rotating plate 409 and the first receiving frame 411 to move upward as a whole. Then, in conjunction with the output of the fourth motor 408 to rotate, the first rotating plate 409 and the first receiving frame 411 are rotated as a whole. The first rotating plate 409 and the first receiving frame 411 are in a horizontal state and are located at the edge of the top of the pit 1. The workers stand inside the first receiving frame 411 and hold the edge of the first receiving frame 411 with their hands. The second frame 416 and the second receiving frame 418 are located at the top of the first sleeve 403 and are in a horizontal state. By controlling the output end of the electric push rod 410 to extend, the first receiving frame 411 moves towards the second receiving frame 418. The worker walks out of the first receiving frame 411 and enters the interior of the second receiving frame 418. Then, the output end of the second stepper motor 415 drives the second lead screw 413 to rotate, so that the second frame 416 and the second receiving frame 418 move downward along the outer wall of the second guide rod 414 to the bottom of the first sleeve 403. The support plate 504 is located at the top of the inside of the support column 103. The worker walks out from the second receiving frame 418 and stands on the top of the support plate 504. By controlling the output end of the fourth stepper motor 501 to rotate, the fourth lead screw 502 is rotated, causing the support plate 504 to move downward along the outer wall of the fourth guide rod 503. Afterward, the worker walks out from the support column 103 through the exit 104 and reaches the bottom of the pit 1. The worker can then inspect or carry out construction inside the pit 1. This method is applicable to pits 1 of different depths and can automatically send workers to the bottom of the pit 1, which is convenient and fast.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A deep foundation pit construction support device, comprising a foundation pit (1), characterized in that, The foundation pit (1) is provided with support plates (101) on all four sides. A column (103) is installed at the middle of the bottom of the foundation pit (1). Three sets of fixing mechanisms (2) are installed on the bottom of the outer surface of the column (103). The fixing mechanisms (2) are used to fix the column (103) inside the foundation pit (1). Four sets of support mechanisms (3) are provided on the top of the outer surface of the column (103). The support mechanisms (3) are used to support the support plates (101) on the inner side of the foundation pit (1). The top of the column (103) is connected to a first auxiliary mechanism (4). A second auxiliary mechanism (5) is also provided inside the column (103). The first auxiliary mechanism (4) and the second auxiliary mechanism (5) work together to send workers into the foundation pit (1) for construction or out of the foundation pit (1).

2. The deep foundation pit construction support device according to claim 1, characterized in that, The fixing mechanism (2) includes a first fixing frame (201) welded to the outer wall of the support column (103). A first motor (202) is fixedly connected to the outer wall of the first fixing frame (201). The output end of the first motor (202) extends into the first fixing frame (201) and is fixedly connected to the rotating cylinder (203). A lifting plate (207) is provided inside the rotating cylinder (203).

3. The deep foundation pit construction support device according to claim 2, characterized in that, The fixing mechanism (2) further includes a first lead screw (204) and a first guide rod (205). The first lead screw (204) is rotatably connected to the inside of the rotating cylinder (203), and the first guide rod (205) is fixedly connected to the inside of the rotating cylinder (203). The outer end of the first lead screw (204) is fixedly connected to the output end of the first stepper motor (206). The first stepper motor (206) is located at the top of the rotating cylinder (203), and the lifting plate (207) is threadedly connected to the outer wall of the first lead screw (204). The lifting plate (207) is slidably connected to the first guide rod (205). A second motor (208) is fixedly installed on the top of the lifting plate (207), and the output end of the second motor (208) is fixedly connected to the drill bit (209).

4. A deep foundation pit construction support device according to claim 3, characterized in that, The support mechanism (3) includes a second fixed frame (301) fixedly installed on the outer wall of the support column (103). A threaded rod (302) is rotatably connected inside the second fixed frame (301). The threads at both ends of the threaded rod (302) are opposite in direction, and both ends of the outer wall of the threaded rod (302) are threadedly connected to movable frames (305). The interiors of the two sets of movable frames (305) are rotatably connected to one end of the first scissor telescopic member (306). A fixed rod (303) is also welded inside the second fixed frame (301). The movable frame (305) is slidably connected to the fixed rod (303).

5. A deep foundation pit construction support device according to claim 4, characterized in that, The second fixed frame (301) is provided with a servo motor (304) for driving the threaded rod (302) to rotate on its outer wall. The other two ends of the first scissor telescopic member (306) are rotatably connected to the inside of two sets of sliding frames (309). Both sets of sliding frames (309) are slidably mounted on the connecting rod (308). The connecting rod (308) is fixedly mounted inside the mounting frame (307). The outer side of the mounting frame (307) is also fixedly connected with a locking block (310). The inner side of the support plate (101) is provided with a locking groove (102) that matches the locking block (310).

6. A deep foundation pit construction support device according to claim 5, characterized in that, The first auxiliary mechanism (4) includes a third fixed frame (401), a second sleeve (404), a third sleeve (405), and a fourth sleeve (406). The third fixed frame (401) is welded to the top of the support column (103). The first sleeve (403) is rotatably connected inside the third fixed frame (401). The rotation of the first sleeve (403) is driven by a third motor (402) provided on the outside of the third fixed frame (401). The second sleeve (404), the third sleeve (405), and the fourth sleeve... (406) are all slidably connected inside the first sleeve (403). The outer end of the fourth sleeve (406) is welded with a first frame (407). The first frame (407) is rotatably connected to a first rotating plate (409). An electric push rod (410) is provided on the top of the first rotating plate (409). The output end of the electric push rod (410) is fixedly connected to the first receiving frame (411). A fourth motor (408) for driving the first rotating plate (409) to rotate is provided on the outer wall of the first frame (407).

7. A deep foundation pit construction support device according to claim 6, characterized in that, The first auxiliary mechanism (4) further includes two sets of connecting blocks (412) fixedly installed on the outer wall of the first sleeve (403). A second lead screw (413) is rotatably connected between the two sets of connecting blocks (412). A second frame (416) is threadedly connected to the outer surface of the second lead screw (413). The second frame (416) is slidably connected to the second guide rod (414). The two ends of the second guide rod (414) are respectively fixedly connected to the inner walls of the two sets of connecting blocks (412). A second stepper motor (415) for driving the second lead screw (413) to rotate is provided at the bottom of one set of connecting blocks (412). A second receiving frame (418) is rotatably connected inside the second frame (416). The rotation of the second receiving frame (418) is driven by a fifth motor (417) provided on the outside of the second frame (416).

8. A deep foundation pit construction support device according to claim 7, characterized in that, A third stepper motor (419) is fixedly installed inside the first sleeve (403). The output end of the third stepper motor (419) is fixedly connected to the third lead screw (420). A third guide rod (421) is also fixedly connected inside the first sleeve (403). A lifting frame (422) is slidably connected to the third guide rod (421). The lifting frame (422) is threadedly connected to the third lead screw (420). A second scissor telescopic component (423) is rotatably installed inside the lifting frame (422). The bottom ends of the second scissor telescopic member (423) are rotatably connected to the bottom inside of the first sleeve (403), and the top ends of the second scissor telescopic member (423) are rotatably connected to the top inside of the fourth sleeve (406). Limiting grooves (424) are provided on the inner walls of the third sleeve (405) and the fourth sleeve (406). A limiting rod (425) is connected to the second scissor telescopic member (423), and the limiting rod (425) is slidably connected inside the limiting groove (424).

9. A deep foundation pit construction support device according to claim 8, characterized in that, The second auxiliary mechanism (5) includes a fourth stepper motor (501) fixedly installed at the bottom of the inside of the support column (103). The output end of the fourth stepper motor (501) is fixedly connected to the fourth lead screw (502). The outer wall of the fourth lead screw (502) is threadedly connected to a support plate (504). The support plate (504) is slidably connected to the fourth guide rod (503). The fourth guide rod (503) is welded to the inside of the support column (103), and an outlet (104) is opened through the bottom of the outer wall of the support column (103).

10. A method for supporting deep foundation pit construction, used to implement the deep foundation pit construction support device as described in claim 9, characterized in that, include: S1. The support column (103) is lifted by a crane and kept vertical. The support column (103) is lifted to the middle position of the bottom of the pit (1). The output ends of the three sets of first motors (202) are controlled to rotate, so that the three sets of rotating cylinders (203) rotate, changing the tilt angle of the three sets of rotating cylinders (203). Then, under the action of the output end of the first step motor (206) installed inside each, the lifting plate (207) moves downward along the outer wall of the first guide rod (205), and the drill bit (209) moves downward. At the same time, the output end of the second motor (208) is driven to rotate, driving the drill bit (209) to rotate, so that the drill bit (209) is driven into the ground, thereby fixing the support column (103) at the bottom of the pit (1). At this time, the support column (103) is also in a vertical state. S2. Based on the size of the inner side of the foundation pit (1), select four sets of support plates (101) that are suitable for each other, and place them in sequence on the four inner side walls of the foundation pit (1). Then, control the output end of the corresponding servo motor (304) to rotate, drive the threaded rod (302) to rotate, so that the two sets of movable frames (305) move closer to each other along the outer wall of the fixed rod (303), causing the two sets of sliding frames (309) to also move closer to each other, thereby driving the first scissor telescopic component (306) to be in the extended state, driving the four sets of card blocks (310) to be inserted into the card slots (102) opened on the four sets of support plates (101) respectively, thereby supporting the foundation pit (1) and preventing the foundation pit (1) from collapsing. S3. By controlling the output of the third motor (402) to rotate, the first sleeve (403), second sleeve (404), third sleeve (405), and fourth sleeve (406) are rotated as a whole. Then, by controlling the output of the third stepper motor (419) to rotate, the third lead screw (420) is rotated, which drives the lifting frame (422) to move upward. The second scissor telescopic component (423) is in the extended state, which enables the second sleeve (404), third sleeve (405), and fourth sleeve (406) to move synchronously from the first sleeve. Extending out of the cylinder (403), it drives the first frame (407), the first rotating plate (409) and the first receiving frame (411) to move upward as a whole. Then, in conjunction with the output end of the fourth motor (408), it rotates, driving the first rotating plate (409) and the first receiving frame (411) to rotate as a whole. The first rotating plate (409) and the first receiving frame (411) are in a horizontal state and are located at the edge of the top of the pit (1). The workers stand inside the first receiving frame (411) and hold the edge of the first receiving frame (411) with their hands. The second frame (416) and the second receiving frame (418) are located at the top of the first sleeve (403) and are in a horizontal state. By controlling the output end of the electric push rod (410) to extend, the first receiving frame (411) moves towards the second receiving frame (418). The worker walks out of the first receiving frame (411) and enters the interior of the second receiving frame (418). Then, the output end of the second stepper motor (415) drives the second lead screw (413) to rotate, so that the second frame (416) and the second receiving frame (418) move downward along the outer wall of the second guide rod (414) to the bottom of the first sleeve (403). The support plate (504) is located at the top of the inside of the support column (103). The worker walks out from the second receiving frame (418) and stands on the top of the support plate (504). By controlling the output end of the fourth stepper motor (501) to rotate, the fourth lead screw (502) is driven to rotate, so that the support plate (504) moves downward along the outer wall of the fourth guide rod (503). After that, the worker walks out from the support column (103) through the exit (104) and reaches the bottom of the pit (1). Then, the worker can inspect or carry out construction inside the pit (1). This method is applicable to pits (1) of different depths. The worker can be automatically sent to the bottom of the pit (1), which is convenient and fast.

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