Construction device and method for sinking and deslagging of open caisson in limited space

Abstract

The invention belongs to the technical field of open caisson construction equipment, particularly relates to an open caisson sinking deslagging construction device and method in a limited space, and provides the following scheme aiming at the problem that existing open caisson deslagging equipment is large in size and is not beneficial to being used in the limited space: the open caisson sinking deslagging construction device comprises a prefabricated well body, and a bearing platform plate is arranged outside the prefabricated well body; a screw rod is arranged outside the bearing platform plate, a muck hopper is arranged below the screw rod and located in the prefabricated well body, and an unfolding type muck discharging module is arranged outside the bearing platform plate. According to the open caisson sinking deslagging construction device and method under the limited space, the device can be rapidly deployed in the limited space in a prefabricated well body, the structure is simple, the space occupied area of the device in the prefabricated well body is remarkably reduced through the design of folding and unfolding, and the construction efficiency is improved. Therefore, the interference of the device on the open caisson construction procedure in the prefabricated well body is greatly reduced, the open caisson construction excavation efficiency is improved, and the construction progress is accelerated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of caisson construction equipment, and particularly relates to a caisson sinking and slag discharging construction device and method in a limited space. BACKGROUND

[0002] A caisson is a well-tube structure without bottom and cover. During construction, the structure is first made on the ground, then soil is continuously excavated in the well, and the caisson is sunk to the design elevation by overcoming the friction between the well wall and the soil layer with its own weight. Finally, the caisson is sealed at the bottom to form a stable deep foundation or underground space structure.

[0003] The existing caisson sinking and slag discharging device is large in size, and occupies a large space in the caisson in a limited space, which hinders the work of the equipment and workers in the caisson, is not conducive to the progress of the caisson construction, causes delay of the construction period, and increases the construction cost. SUMMARY

[0004] The present application discloses a caisson sinking and slag discharging construction device and method in a limited space, and aims to solve the technical problem of the large size of the existing caisson slag discharging device in the background art.

[0005] The caisson sinking and slag discharging construction device in a limited space comprises a prefabricated well body, a bearing platform is arranged outside the prefabricated well body, a screw rod is arranged outside the bearing platform, a slag soil hopper is arranged below the screw rod and located in the prefabricated well body, an unfolding slag discharging module is arranged outside the bearing platform, an angle control module is arranged on the bearing platform, the unfolding slag discharging module comprises a conveying pipe, the screw rod is arranged in the conveying pipe, a slag discharging frame is fixedly connected to the outside of the conveying pipe, the slag discharging frame is located on the upper side of the bearing platform, a starting plate is arranged outside the bearing platform, a plurality of extension plates are arranged below the starting plate and distributed at equal intervals, and two symmetrical hydraulic rods are fixedly connected to the bottom of the slag soil hopper.

[0006] In a preferred scheme, the outer part of the conveying pipe is fixedly connected with two symmetrical stabilizing frames, the outer parts of the two stabilizing frames are fixedly connected with the starting plate and the lowermost extension plate respectively, and each of the adjacent starting plate and extension plate is movably connected with the same adapter, the outer parts of the starting plate and the extension plate are fixedly connected with a plurality of symmetrical bosses; the outer part of the bearing platform is fixedly connected with two symmetrical hooking frames, the inner walls of the two hooking frames are slidably connected with the same connecting shaft, a circular hole is formed in the starting plate, the inner wall of the circular hole is fixedly connected with the outer part of the connecting shaft, and the same pin is inserted into the two adjacent bosses on the same side; the outer parts of the two hooking frames are fixedly connected with arc surface accommodating frames, the arc surface accommodating frames are located outside the connecting shaft, the inner walls of the arc surface accommodating frames are slidably connected with curved surface limiting racks, curved surface grooves are formed in the arc surface accommodating frames, the curved surface grooves are slidably connected with the pull rods, the opposite sides of the pull rods and the curved surface limiting racks are fixedly connected, the opposite sides of the curved surface limiting racks and the connecting shaft are slidably connected, a plurality of circumferentially equidistant arc-shaped plates are fixedly connected to the upper side of the precast well body, sliding rails are formed in the arc-shaped plates, the inner walls of the sliding rails are slidably connected with the outer part of the bearing platform, the inner walls of the arc-shaped plates are fixedly connected with arc-shaped racks, a transmission motor is fixedly connected to the outer part of the bearing platform, the output end of the transmission motor is connected with a gear through a shaft coupling, and the gears are engaged with the arc-shaped racks; the outer parts of the two hooking frames are fixedly connected with short shafts, the outer parts of the short shafts are movably connected with buckles, cutouts are formed in the outer parts of the arc surface accommodating frames, the buckles are located in the cutouts, the outer parts of the buckles are clamped with the outer parts of the curved surface limiting racks on the same side, the outer parts of the short shafts are fixedly connected with torsion springs, and the outer parts of the torsion springs away from the short shafts are fixedly connected with the outer parts of the hooking frames on the same side; the outer part of the screw rod is movably connected with a guide block, the outer part of the guide block is fixedly connected with the inner wall of the conveying pipe, a notch is formed in the conveying pipe, the notch and the guide block are located in the same plane, a driving motor is fixedly connected to the upper side of the slag discharging frame, the output end of the driving motor is connected with the upper side of the screw rod through a shaft coupling, two symmetrical hole grooves are formed in the outer part of the slag discharging frame, rotating rollers are movably connected in the hole grooves, the outer parts of the two rotating rollers are provided with the same conveying belt, the conveying belt is located in the slag discharging frame, a rotating motor is fixedly connected to the outer part of the slag discharging frame, the output end of the rotating motor is connected with one side of one of the rotating rollers through a shaft coupling, the outer part of the lowermost extension plate is movably connected with the inner wall of the slag soil hopper, two symmetrical hydraulic rods are fixedly connected to the bottom of the slag soil hopper, and the output ends of the hydraulic rods are fixedly connected with rollers.

[0007] In a preferred scheme, the angle control module comprises a rectangular groove, the rectangular groove is provided on the bearing platform, the inner wall of the rectangular groove is fixedly connected with a shaft rod, the outer portion of the shaft rod is movably connected with a steering plate, and the inner walls of the two sides of the rectangular groove are both provided with a narrow groove; the same wedge-shaped plate is slidably connected in the two narrow grooves, the side opposite to the steering plate of the wedge-shaped plate is slidably connected, and the outer portion of the bearing platform is fixedly connected with four symmetrical bosses; the inner walls of the two bosses located on the same side are movably connected with a smooth rod and a threaded rod respectively, and the outer portion of the wedge-shaped plate is provided with two symmetrical fine holes, the inner wall of one of the fine holes is slidably connected with the outer portion of the smooth rod, the inner wall of the other fine hole is rotatably connected with the outer portion of the threaded rod through external threads, and the upper side of the threaded rod is fixedly connected with a knob.

[0008] A limited space sinking well sinking slag construction method uses a limited space sinking well sinking slag construction device as described above, and includes the following steps:

[0009] Step one, when the slag is discharged at the bottom of the sinking well construction, the slag discharge direction on the prefabricated well body is selected, and the slag discharge equipment is built on the upper edge of the prefabricated well body;

[0010] Step two, the excavated slag is accumulated in the slag hopper by excavating instruments or personnel, the spiral rod is driven to rotate by the unfolding slag discharge module to lift the slag, and the slag is discharged through the slag discharge frame;

[0011] Step three, when the new soil layer is excavated, the angle of the starting plate is adjusted by using the angle control module, so that the slag hopper can be as close as possible to the excavation part, and the angle is adjusted in time as the excavation part spreads outwards from the center.

[0012] As can be seen from the above, the limited space sinking well sinking slag construction device provided by the present application has the advantages that the device can be quickly deployed in the limited space in the prefabricated well body, the structure is simple, the space occupation area of the device in the prefabricated well body is significantly reduced through the foldable and unfolding design, the device greatly reduces the obstruction to the sinking well construction process in the prefabricated well body, improves the efficiency of the sinking well construction excavation, and improves the effect of the construction progress. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The present application provides a limited space sinking well sinking slag construction device, and a whole structure schematic view of the limited space sinking well sinking slag construction device is shown in the figure;

[0014] Figure 2 The present application provides a limited space sinking well sinking slag construction device, and a whole structure schematic view of the limited space sinking well sinking slag construction device is shown in the figure;

[0015] Figure 3 The present application provides a limited space sinking well sinking slag construction device, and a whole structure schematic view of the limited space sinking well sinking slag construction device is shown in the figure;

[0016] Figure 4 A starting plate structure diagram of a limited space sinking well sinking slag construction device is provided in the present application.

[0017] Figure 5 A slag discharge frame structure diagram of a limited space sinking well sinking slag construction device is provided in the present application.

[0018] Figure 6 An arc surface containing frame structure diagram of a limited space sinking well sinking slag construction device is provided in the present application.

[0019] Figure 7 A slag soil bucket structure diagram of a limited space sinking well sinking slag construction device is provided in the present application.

[0020] Figure 8 An angle control module structure diagram of a limited space sinking well sinking slag construction device is provided in the present application.

[0021] In the figure: 1, prefabricated well body; 2, bearing plate; 3, slag soil bucket; 4, unfolding slag discharge module; 401, conveying pipe; 402, stabilizing frame; 403, hydraulic rod; 404, arc plate; 405, sliding rail; 406, arc rack; 407, slag discharge frame; 408, driving motor; 409, guide block; 410, connecting shaft; 411, hooking frame; 412, starting plate; 413, extension plate; 414, adapter; 415, convex seat; 416, bolt; 417, rotating roller; 418, conveyor belt; 419, rotating motor; 420, arc surface containing frame; 421, curved surface limiting rack; 422, curved surface groove; 423, lever; 424, fastener; 425, torsional spring; 426, roller; 427, transmission motor; 428, gear; 5, angle control module; 501, rectangular groove; 502, shaft; 503, turning plate; 504, narrow groove; 505, wedge-shaped plate; 506, boss; 507, smooth rod; 508, threaded rod; 509, knob; 6, screw rod. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0023] The limited space sinking well sinking slag construction device disclosed in the present application is mainly applied to the scene that the existing sinking well slag discharge equipment is large in size and is not conducive to use in limited space.

[0024] REFERENCE Figures 1-8The application discloses a sinking well sinking slag construction device in a limited space, which comprises a prefabricated well body 1, an abutment plate 2 arranged outside the prefabricated well body 1, a spiral rod 6 arranged outside the abutment plate 2, a slag hopper 3 arranged below the spiral rod 6 and located in the prefabricated well body 1, an unfolding slag discharging module 4 arranged outside the abutment plate 2, an angle control module 5 arranged on the abutment plate 2, the unfolding slag discharging module 4 comprising a conveying pipe 401, the spiral rod 6 being arranged in the conveying pipe 401, a slag discharging frame 407 being bolted to the outside of the conveying pipe 401 and located on the upper side of the abutment plate 2, a starting plate 412 being arranged outside the abutment plate 2, a plurality of extension plates 413 being arranged at equal intervals below the starting plate 412, and two symmetrical hydraulic rods 403 being bolted to the bottom of the slag hopper 3.

[0025] Specifically, the device can be quickly deployed in the limited space in the prefabricated well body 1 by using the unfolding slag discharging module 4, the structure is simple, the space occupation area of the device in the prefabricated well body 1 is significantly reduced by the foldable and unfolding design, the device greatly reduces the obstruction to the sinking well construction process in the prefabricated well body 1, the efficiency of the sinking well construction and the earth excavation is improved, and the construction progress is improved.

[0026] Referring to Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7In a preferred embodiment, the outside of the conveying pipe 401 is bolted to two symmetrical stabilizers 402. The outside of the two stabilizers 402 is bolted to the outside of the starting plate 412 and the outside of the lowermost extension plate 413, respectively. Adjacent starting plates 412 and extension plates 413 are rotatably connected by the same connector 414 via bearings. Multiple symmetrical bosses 415 are bolted to the outside of both the starting plate 412 and the extension plate 413. The outside of the support plate 2 is bolted to two symmetrical hook brackets 411. The inner wall of 411 is slidably connected to the same connecting shaft 410. A circular hole is provided on the starting plate 412, and the inner wall of the circular hole is bolted to the outside of the connecting shaft 410. Two adjacent bosses 415 on the same side are fitted with the same pin 416. Both hook brackets 411 are bolted to the outside of an arc-shaped receiving frame 420. The arc-shaped receiving frames 420 are located outside the connecting shaft 410. The inner wall of each arc-shaped receiving frame 420 is slidably connected to a curved limiting rack 421. Each arc-shaped receiving frame 420 has a curved groove 422. The curved groove 422 contains a sliding... A lever 423 is dynamically connected, and the side of the lever 423 opposite to the curved surface limiting rack 421 is bolted together. The side of the curved surface limiting rack 421 opposite to the connecting shaft 410 is slidably connected. Multiple circumferentially distributed arc-shaped plates 404 are bolted to the upper side of the precast well body 1. Each arc-shaped plate 404 has a slide rail 405, and the inner wall of the slide rail 405 is slidably connected to the outer side of the support plate 2. Arc-shaped racks 406 are bolted to the inner walls of the arc-shaped plates 404. A drive motor 427 is bolted to the outer side of the support plate 2. The output end of 27 is connected to gear 428 via a coupling, and gear 428 meshes with arc-shaped rack 406; the exterior of both hook brackets 411 is connected to short shafts via bolts, and the exterior of the short shafts is rotatably connected to fasteners 424 via bearings; the exterior of the arc-shaped receiving frame 420 is provided with a notch, and fasteners 424 are located in the notch; the exterior of fasteners 424 is engaged with the exterior of the curved limiting rack 421 on the same side; and the exterior of the short shafts is connected to torsion springs 425 via bolts, and the exterior of torsion springs 425 away from the short shafts is connected to the exterior of the hook brackets 411 on the same side via bolts;A guide block 409 is rotatably connected to the outside of the screw rod 6 via bearings. The outside of the guide block 409 is bolted to the inner wall of the conveying pipe 401. A slot is provided on the conveying pipe 401, and the slot and the guide block 409 are located on the same plane. A drive motor 408 is bolted to the upper side of the slag discharge frame 407. The output end of the drive motor 408 is connected to the upper side of the screw rod 6 via a coupling. Two symmetrical slots are provided on the outside of the slag discharge frame 407, and rotating rollers 417 are rotatably connected to each slot via bearings. A conveyor belt 418 is installed outside the roller 417. The conveyor belt 418 is located inside the slag discharge frame 407. A rotating motor 419 is bolted to the outside of the slag discharge frame 407. The output end of the rotating motor 419 is connected to one side of one of the rotating rollers 417 via a coupling. The outer side of the lowermost extension plate 413 is rotatably connected to the inner wall of the slag hopper 3 via bearings. Two symmetrical hydraulic rods 403 are bolted to the bottom of the slag hopper 3. The output ends of the hydraulic rods 403 are bolted to rollers 426.

[0027] Specifically, after selecting the slag discharge position, the drive motor 427 is started. The drive motor 427 drives the gear 428 to rotate, allowing the support plate 2 to rotate along the slide rail 405 on the arc plate 404. After moving to the designated position, the drive motor 427 is turned off, and the connecting shaft 410 connected to the starting plate 412 is placed on the hook bracket 411. The lever 423 is rotated, causing the lever 423 to push the curved limiting rack 421 to rotate along the outside of the connecting shaft 410. Under the torque of the torsion spring 425, the fastener 424 locks the curved limiting rack 421, so that the curved limiting rack 421 and the arc receiving frame 420 are wrapped around the outside of the connecting shaft 410. The folded starting plate 412, connecting piece 414 and extension plate 413 are unfolded. According to the depth of the caisson, the connecting piece 414 and extension plate 413 are continued at the bottom. On the long plate 413, the pin 416 is inserted into the boss 415 to keep the starting plate 412 and the extension plate 413 in a straight line. The stabilizing frame 402, which is connected to the conveying pipe 401 and the slag discharge frame 407, is installed on the starting plate 412 and the extension plate 413. The drive motor 408 and the rotation motor 419 are started. The excavating equipment or workers put the excavated slag into the slag hopper 3. The inner wall of the slag hopper 3 facing the central axis of the precast well body 1 is sloping. After the slag is filled into 3, it will slide down towards the direction of the auger 6. The auger 6 lifts the slag while rotating and guides it through the guide block 409. It falls onto the conveyor belt 418 and is discharged with the conveyor belt 418. As the slag is discharged, under the action of the bottom wedge-shaped cutting foot of the precast well body 1, the precast well body 1 will gradually sink as the caisson is excavated and eventually sink to the elevation.

[0028] In specific application scenarios, the unfolding slag discharge module 4 is mainly suitable for the unfolding slag discharge stage in the unfolding slag discharge process. That is, the unfolding slag discharge module 4 uses the conveying pipe 401, screw rod 6, slag hopper 3, and conveyor belt 418 to enable the equipment to quickly and conveniently complete the lifting and transportation of slag at the bottom of the well, improving the conveying efficiency of the device. The starting plate 412, extension plate 413, connecting piece 414, and pin 416 can be used to adjust the length of the device according to the well depth during use, improving the adaptability of the device. The connecting shaft 410 and hook bracket 411 can improve the assembly and disassembly efficiency of the device. The device can be folded and stored when not in use to save space, and unfolded when in use to ensure that its function is not affected. The curved receiving frame 420, the curved limiting rack 421 and the fastener 424 can constrain the position of the connecting shaft 410, preventing the spiral rod 6 on the starting plate 412 from being affected by vibration during operation and detaching from the hook frame 411 and collapsing, thus reducing the safety risk. The hydraulic rod 403 and the roller 426 can adjust the level of the slag hopper 3 when the device is in use, thereby ensuring that the slag hopper 3 can fully contain the slag and effectively assist the spiral rod 6 in picking up the slag.

[0029] Reference Figure 8 In a preferred embodiment, the angle control module 5 includes a rectangular groove 501, which is formed on the support plate 2. The inner wall of the rectangular groove 501 is bolted to a shaft 502, and the outer side of the shaft 502 is rotatably connected to a steering plate 503 via a bearing. Narrow grooves 504 are formed on both inner walls of the rectangular groove 501. A wedge plate 505 is slidably connected to the two narrow grooves 504. The wedge plate 505 is slidably connected to the side opposite to the steering plate 503. Four symmetrical bosses 506 are bolted to the outer side of the support plate 2. The inner walls of the two bosses 506 on the same side are respectively rotatably connected to a smooth rod 507 and a threaded rod 508 via bearings. Two symmetrical small holes are formed on the outer side of the wedge plate 505. The inner wall of one small hole is slidably connected to the outer side of the smooth rod 507, and the inner wall of the other small hole is rotatably connected to the outer side of the threaded rod 508 via an external thread. A knob 509 is bolted to the upper side of the threaded rod 508.

[0030] Specifically, when excavating the new soil layer at the bottom of the well, the knob 509 is turned, which drives the threaded rod 508 to rotate, thereby causing the wedge plate 505 to move upward. The wedge plate 505 pushes the steering plate 503 to rotate around the shaft 502 towards the starting plate 412, thereby lifting the starting plate 412 and causing the starting plate 412 to rotate around the connecting shaft 410, so that the slag hopper 3 can approach the center of the soil layer excavation area.

[0031] In specific application scenarios, the angle control module 5 is mainly used for the angle control link in the angle control process. That is, the angle control module 5 can control the rotation angle of the starting plate 412 by using the wedge plate 505 and the steering plate 503. Thus, when excavating the slag at the center of the bottom of the well, the slag hopper 3 can be as close as possible, reducing the slag transportation distance and reducing the consumption of excavation equipment or workers when transferring slag.

[0032] A method for constructing a caisson in a confined space for muck removal, using a caisson in a confined space for muck removal construction device as described above, includes the following steps:

[0033] Step 1: When removing slag from the bottom of the caisson during construction, select the slag removal direction on the precast caisson body 1 and set up the slag removal equipment on the upper edge of the precast caisson body 1.

[0034] Step 2: Excavators or personnel pile the excavated soil into the slag hopper 3. The unfolding slag discharge module 4 drives the auger 6 to rotate, lifting the soil and discharging it through the slag discharge frame 407. (After selecting the discharge position, start the drive motor 427. The drive motor 427 drives the gear 428 to rotate, allowing the support plate 2 to rotate along the slide rail 405 on the arc plate 404. After moving to the designated position, turn off the drive motor 427. Place the connecting shaft 410, which is connected to the starting plate 412, on the hook frame 411. Rotate the lever 423, causing it to push the curved limiting rack 421 to rotate along the outside of the connecting shaft 410. Under the torque of the torsion spring 425, the fastener 424 locks the curved limiting rack 421, causing the curved limiting rack 421 and the arc receiving frame 420 to wrap around the outside of the connecting shaft 410. Unfold the folded starting plate 412, connecting piece 414, and extension plate 413.) Depending on the depth of the caisson, the connector 414 and extension plate 413 are connected to the bottom extension plate 413. The pin 416 is inserted into the boss 415 to keep the starting plate 412 and extension plate 413 in a straight line. The stabilizing frame 402, which is connected to the conveying pipe 401 and the slag discharge frame 407, is installed on the starting plate 412 and extension plate 413. The drive motor 408 and the rotation motor 419 are started, and the excavating equipment or workers put the excavated slag into the slag discharge frame. In the hopper 3, the inner wall of the hopper 3 facing the central axis of the precast well body 1 is sloping. After the slag is filled into hopper 3, it will slide down towards the direction of the auger rod 6. The auger rod 6 lifts the slag as it rotates and guides it through the guide block 409, so that it falls onto the conveyor belt 418 and is discharged with the conveyor belt 418. As the slag is discharged, under the action of the bottom wedge-shaped cutting foot of the precast well body 1, the precast well body 1 will gradually sink as the caisson is excavated, and eventually sink to the elevation.

[0035] Step 3: When excavating the new soil layer, use the angle control module 5 to adjust the angle of the starting plate 412 so that the slag hopper 3 can be as close as possible to the excavation site. As the excavation site spreads outward from the center, the angle is adjusted in time. (When excavating the new soil layer at the bottom of the well, turn the knob 509. The knob 509 drives the threaded rod 508 to rotate, thereby moving the wedge plate 505 upward. The wedge plate 505 pushes the steering plate 503 to rotate in the direction of the starting plate 412 around the shaft 502, thereby lifting the starting plate 412 and making the starting plate 412 rotate around the connecting shaft 410 so that the slag hopper 3 can be close to the center excavation area of ​​the soil layer.)

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A confined space caisson sinking and slag removal construction device, comprising a prefabricated well body (1), characterized in that, The prefabricated well body (1) is provided with a support plate (2) on the outside, a spiral rod (6) is provided on the outside of the support plate (2), a slag hopper (3) is provided below the spiral rod (6), and the slag hopper (3) is located inside the prefabricated well body (1). An unfoldable slag discharge module (4) is provided on the outside of the support plate (2), and an angle control module (5) is provided on the support plate (2). The unfoldable slag discharge module (4) includes a conveying pipe (401), the spiral rod (6) is located inside the conveying pipe (401), and a slag discharge frame (407) is bolted to the outside of the conveying pipe (401). The slag discharge frame (407) is located on the upper side of the support plate (2). A starting plate (412) is provided on the outside of the support plate (2), and multiple equidistant extension plates (413) are provided below the starting plate (412). Two symmetrical hydraulic rods (403) are bolted to the bottom of the slag hopper (3).

2. The confined space caisson sinking and slag removal construction device according to claim 1, characterized in that, The outside of the conveying pipe (401) is connected by bolts to two symmetrical stabilizers (402). The outside of the two stabilizers (402) is connected by bolts to the outside of the starting plate (412) and the bottom extension plate (413), respectively. The adjacent starting plate (412) and extension plate (413) are rotatably connected by the same connector (414) through bearings. The outside of the starting plate (412) and extension plate (413) are connected by bolts to multiple symmetrical bosses (415).

3. The confined space caisson sinking and slag removal construction device according to claim 2, characterized in that, The outer side of the support plate (2) is connected by bolts to two symmetrical hook brackets (411). The inner walls of the two hook brackets (411) are slidably connected to the same connecting shaft (410). The starting plate (412) has a round hole. The inner wall of the round hole is connected to the outer side of the connecting shaft (410) by bolts. The same pin (416) is inserted into two adjacent bosses (415) on the same side.

4. The confined space caisson sinking and slag removal construction device according to claim 3, characterized in that, Both hook brackets (411) are externally connected to arc-shaped receiving frames (420) by bolts. The arc-shaped receiving frames (420) are located outside the connecting shaft (410). The inner walls of the arc-shaped receiving frames (420) are slidably connected to curved limiting racks (421). The arc-shaped receiving frames (420) are provided with curved grooves (422). The curved grooves (422) are slidably connected to levers (423). The levers (423) and the side opposite to the curved limiting racks (421) are connected by bolts. The side opposite to the curved limiting racks (421) and the connecting shaft (410) is also connected by bolts. The precast well body (1) is connected by bolts to multiple circumferentially distributed arc plates (404). Each arc plate (404) is provided with a slide rail (405). The inner wall of the slide rail (405) is slidably connected to the outer side of the support plate (2). The inner wall of the arc plate (404) is not uniformly connected to an arc rack (406) by bolts. The outer side of the support plate (2) is connected to a drive motor (427) by bolts. The output end of the drive motor (427) is connected to a gear (428) by a coupling. The gear (428) meshes with the arc rack (406).

5. A confined space caisson sinking and slag removal construction device according to claim 4, characterized in that, Both hook brackets (411) are bolted to the outside of each short shaft, and fasteners (424) are rotatably connected to the outside of each short shaft via bearings. The outside of the arc-shaped receiving frame (420) is provided with a cutout, and the fasteners (424) are located inside the cutout. The outside of the fasteners (424) is engaged with the outside of the curved limiting rack (421) on the same side. The outside of each short shaft is bolted to a torsion spring (425), and the outside of the torsion springs (425) away from the short shaft is bolted to the outside of the hook brackets (411) on the same side.

6. The confined space caisson sinking and slag removal construction device according to claim 5, characterized in that, The screw rod (6) is rotatably connected to a guide block (409) via a bearing. The outer side of the guide block (409) is bolted to the inner wall of the conveying pipe (401). A slot is provided on the conveying pipe (401), and the slot is located on the same plane as the guide block (409). A drive motor (408) is bolted to the upper side of the slag discharge frame (407). The output end of the drive motor (408) is connected to the upper side of the screw rod (6) via a coupling. Two symmetrical slots are provided on the outer side of the slag discharge frame (407). Rotating rollers (417) are rotatably connected to each slot via bearings. (417) is equipped with the same conveyor belt (418) on the outside. The conveyor belt (418) is located inside the slag discharge frame (407). The outside of the slag discharge frame (407) is connected to a rotating motor (419) by bolts. The output end of the rotating motor (419) is connected to one side of one of the rotating rollers (417) by a coupling. The outside of the extension plate (413) at the bottom is rotatably connected to the inner wall of the slag hopper (3) by bearings. The bottom of the slag hopper (3) is connected to two symmetrical hydraulic rods (403) by bolts. The output ends of the hydraulic rods (403) are all connected to rollers (426) by bolts.

7. A confined space caisson sinking and slag removal construction device according to claim 6, characterized in that, The angle control module (5) includes a rectangular groove (501), which is provided on the support plate (2). The inner wall of the rectangular groove (501) is connected to a shaft (502) by bolts. The outer side of the shaft (502) is rotatably connected to a steering plate (503) by bearings. Narrow grooves (504) are provided on both sides of the inner wall of the rectangular groove (501).

8. A confined space caisson sinking and slag removal construction device according to claim 7, characterized in that, The same wedge plate (505) is slidably connected in the two narrow slots (504). The wedge plate (505) is slidably connected to the side opposite to the steering plate (503), and four symmetrical bosses (506) are bolted to the outside of the support plate (2).

9. A confined space caisson sinking and slag removal construction device according to claim 8, characterized in that, The inner walls of the two protrusions (506) located on the same side are respectively rotatably connected to a smooth rod (507) and a threaded rod (508) via bearings. The wedge plate (505) has two symmetrical small holes on its outer side. The inner wall of one of the small holes is slidably connected to the outer side of the smooth rod (507), and the inner wall of the other small hole is rotatably connected to the outer side of the threaded rod (508) via an external thread. A knob (509) is connected to the upper side of the threaded rod (508) via a bolt.

10. A method for constructing a caisson in a confined space with muck removal, using a caisson in a confined space with muck removal construction device as described in claim 9, characterized in that... Includes the following steps: Step 1: When removing slag at the bottom of the caisson during construction, select the slag removal direction on the precast caisson body (1) and set up the slag removal equipment on the upper edge of the precast caisson body (1); Step 2: Excavating equipment or personnel pile the excavated slag into the slag hopper (3), use the unfolded slag discharge module (4) to drive the screw rod (6) to rotate and lift the slag, and discharge the slag through the slag discharge frame (407); Step 3: When excavating the new soil layer, use the angle control module (5) to adjust the angle of the starting plate (412) so that the slag bucket (3) can be as close as possible to the excavation site, and adjust the angle in time as the excavation site spreads outward from the center.

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