Active control sinking method for passive sinking of urban open caisson

Abstract

The invention relates to the field of building installation, and discloses an urban open caisson passive sinking'active regulation and control 'sinking method, which comprises a regulation and control system, the regulation and control system comprises a protection box arranged on the ground, and a circulation mechanism is arranged in the protection box; the connecting mechanism is connected with the circulating mechanism, one side of the connecting mechanism is connected with a plurality of sedimentation mechanisms and an open caisson main body which are spliced with one another, a plurality of grouting holes which are transversely formed are formed in the middle of the open caisson main body, internal pipes are connected in the grouting holes, a plurality of vertical holes which are formed in the forward direction are formed in the open caisson main body, vertical pipes are connected in the vertical holes, and the vertical pipes are connected in the open caisson main body. According to the open caisson device, open caisson work can be conveniently carried out, meanwhile, multi-point and multi-dimensional adjustment can be carried out at any time in the open caisson process, the posture of an open caisson body can be conveniently adjusted, open caisson work is guaranteed, excavation work can be simplified, the overall work difficulty can be lowered, the open caisson device adapts to open caisson and adjustment in different environments and different terrains, the adaptability is wide, and the open caisson device is worthy of popularization and application. The application is convenient.

Description

Technical Field

[0001] The invention relates to the field of building installation, and in particular to a sinking method for "actively regulating" passive sinking of an urban caisson. Background Art

[0002] Caisson is a shaft-shaped structure. It is excavated in the well, and sinks to the designed elevation by relying on its own gravity to overcome the friction resistance of the well wall. Then, it is sealed with concrete and the well hole is filled to make it the foundation of bridge piers or other structures. It is generally used in the construction of foundation pits of large bridge piers, sewage pumping stations, large equipment foundations, civil air defense shelters, shield assembly wells, underground lanes and station hydraulic foundation construction enclosures. The geological conditions and surrounding environment of the construction site of the jacking work well in the project are relatively complex. The verticality and stability of the caisson are difficult to control during the construction process, and the deformation characteristics of the soil around the caisson are difficult to grasp during the actual construction process. The settlement problem of the surrounding soil caused by this is more common during the caisson construction process. In addition, when taking soil for the sinking of the caisson in the soil layer of special areas, the surrounding soil may flow into the well due to the increase in the height difference between the inside and outside of the well, causing the soil at the bottom of the well to bulge, making it difficult to sink the caisson, affecting subsequent construction. Summary of the invention

[0003] In order to solve the technical problem of inconvenient construction adjustment, the present invention provides a sinking method of "active regulation" of passive sinking of urban caisson.

[0004] The present invention is implemented by the following technical scheme: a sinking method of passive sinking "active regulation" of urban caisson, comprising the following steps:

[0005] S1: Geological survey to understand the underground soil layer distribution, groundwater level and other information;

[0006] S2: Structural design, design the appropriate caisson body size, shape and wall thickness according to geological conditions, and dig the preliminary foundation pit on the ground;

[0007] S3: Install the platform ring in the foundation pit, and hoist the caisson body at the bottom to achieve connection, and use its own gravity to lower the caisson body;

[0008] S4: Install the next layer of caisson, and install the control system on the caisson and make connections;

[0009] S5: Based on the measurement, fine-tune the corresponding points to balance the caisson and reach the specified parameters;

[0010] S6: inject water through a high-pressure pipe to flush and soften the soil at the bottom, allowing the main body of the caisson to continue sinking;

[0011] S7: remove part of the control system, install a new caisson body on the top caisson, and after the installation is completed, put on the removed control system to carry out the next round of caisson;

[0012] S8: Continue to make fine adjustments by grouting at the deviation locations through measurement;

[0013] S9: Remove part of the control system and fill the corresponding holes with high-strength concrete.

[0014] As a further improvement of the above scheme, the control system includes: a protection box, which is arranged on the ground, and a circulation mechanism is arranged in the protection box; a connecting mechanism, which is connected to the circulation mechanism, and one side of the connecting mechanism is connected to a plurality of mutually spliced ​​settlement mechanisms;

[0015] As a further improvement of the above scheme, the sinking mechanism comprises: a caisson body, in the middle of which a plurality of grouting holes arranged horizontally are arranged, the grouting holes are connected to internal pipes, and the caisson body is provided with a plurality of vertical holes arranged in the forward direction, the vertical holes are connected to vertical pipes;

[0016] As a further improvement of the above scheme, a connecting unit is arranged in the caisson body; the connecting unit includes: a connecting sleeve three, which is fixedly connected to one end of the internal pipe, the other end of the connecting sleeve three is connected to the external pipe, the other end of the external pipe is connected to a connecting sleeve four, the middle of the connecting sleeve four is rotatably connected to the slurry pipe, and the top of the slurry pipe is rotatably connected to the connecting sleeve one; an extraction pipe, which is arranged in the slurry pipe, the outer side of the extraction pipe is fixedly connected to a support rod fixedly connected to the slurry pipe, and one end of the extraction pipe is rotatably connected to the connecting sleeve two; an excavation unit, which is connected to the extraction pipe at the bottom.

[0017] As a further improvement of the above scheme, the excavation unit includes: a table-shaped ring, on which a plurality of conducting tubes are fixedly connected, one end of the conducting tubes extends into the vertical hole at the bottom for connection; a rotating column, which is rotatably sleeved on the bottom end of the conducting tube, and a plurality of fixed nozzles are fixedly connected to the outer side of the rotating column; a power box, which is fixedly connected in the rotating column, the input end of the power box is connected to a feed pipe connected to the conducting tube, the power output end of the power box is transmission-connected to a transmission box 2, the output end of the transmission box 2 is transmission-connected to a transmission box 1, the output end of the transmission box 1 is connected to a pulling column, and the other end of the pulling column is fixedly connected to a moving nozzle slidably sleeved with the fixed nozzle.

[0018] As a further improvement of the above solution, a spray hole is provided on one side of the fixed nozzle, the cross section of the trapezoidal ring is stepped, and the liquid output end of the power box is located inside the trapezoidal ring.

[0019] As a further improvement of the above scheme, the connecting mechanism includes: a dispersion ring, which is connected to the vertical pipe at the top, and one side of the dispersion ring is connected to a high-pressure pipe connected to the circulation mechanism; a dispersion sleeve, which is connected to the connecting sleeve 1 at the top, one side of the dispersion sleeve is connected to a slurry pipe, and the top of the dispersion sleeve is connected to a sealing cover; a suction pipe, one end of which is connected to the circulation mechanism, and the other end of the suction pipe is connected to the connecting sleeve 2 at the top.

[0020] As a further improvement of the above solution, a stabilizing ring is sleeved on the outer side of the dispersion sleeve, a plurality of telescopic rods are fixedly connected to the outer side of the stabilizing ring, and one end of the telescopic rod is connected to a support column.

[0021] As a further improvement of the above scheme, the circulation mechanism includes: a sewage pump, which is fixedly connected to the protection box, the input end of the sewage pump is connected to the suction pipe, the output end of the sewage pump is connected to the lifting pipe, and the other end of the lifting pipe is connected to the filter box fixedly connected to the protection box; a guide pipe, which is connected to the filter box, and the other end of the guide pipe is connected to the filter press located in the protection box; a clean water pipe, one end of which is connected to the bottom of the filter box, and the other end is connected to the purification box fixedly connected to the protection box, and the clean water end of the filter press is connected to the purification box; a series pipe, one end of which is connected to the purification box, and the other end is connected to the booster located in the protection box, and one end of the booster is connected to the high-pressure pipe.

[0022] As a further improvement of the above scheme, the slurry pipe water injection pressure booster is 200-1000 bar, and the grouting slurry is concrete or polymer filling material.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. Through the mutual cooperation between multiple devices, the caisson work can be carried out conveniently. At the same time, multi-point and multi-dimensional adjustments can be made at any time during the caisson process, which is convenient for adjusting the posture of the caisson body, ensuring the progress of the caisson work, simplifying the excavation work, and reducing the difficulty of the overall work.

[0025] 2. Through water circulation injection, it can save water resources while adapting to smaller caissons and reducing the area for laying surrounding equipment. It can adapt to caissons in different environments and terrains and can be adjusted. It has wide adaptability and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a flow chart of the present invention;

[0027] Figure 2 It is a schematic diagram of the overall structure of the front side of the present invention;

[0028] Figure 3 It is a schematic diagram of the overall structure of the rear side of the present invention;

[0029] Figure 4 It is a schematic diagram of the front structure of the circulation mechanism;

[0030] Figure 5 It is a schematic diagram of the rear structure of the circulation mechanism;

[0031] Figure 6 This is a schematic diagram of the main structure of the caisson from a bird's-eye view;

[0032] Figure 7 This is a schematic diagram of the main structure of the caisson when viewed from above;

[0033] Figure 8 is a schematic diagram of the connecting mechanism structure;

[0034] Fig. 9 This is a schematic diagram of the excavation unit structure;

[0035] Fig.10 It is a schematic diagram of the local structure of the excavation unit;

[0036] Fig.11 It is a partial cutaway diagram of the excavation unit;

[0037] Fig.12 This is a partial upward-looking schematic diagram of the excavation unit.

[0038] Description of main symbols:

[0039] 01. Protective box; 02. Suction pipe; 03. Slurry pipe; 04. Dispersion ring; 05. Support column; 06. Telescopic rod; 07. Vertical pipe; 08. Grouting hole; 09. Platform ring; 11. Caisson body; 12. Stabilization ring; 13. High-pressure pipe; 14. Controller; 15. Water tank; 16. Filter box; 17. Sewage pump; 20. Booster; 21. Serial pipe; 22. Purification box; 23. Filter press; 24. Diversion pipe; 26. Lifting pipe ; 27. Dispersion sleeve; 28. Sealing cover; 29. ​​Internal tube; 30. External tube; 31. Connecting sleeve one; 32. Connecting sleeve two; 33. Extraction tube; 34. Connecting sleeve three; 35. Slurry tube; 36. Connecting sleeve four; 38. Vertical hole; 39. Conducting tube; 40. Rotating column; 41. Fixed nozzle; 42. Moving nozzle; 43. Injection hole; 44. Transmission box one; 45. Power box; 46. Transmission box two; 47. Pumping column; 48. Feeding pipe. DETAILED DESCRIPTION

[0040] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0041] Example:

[0042] Please combine Figure 1-12 A sinking method of "active regulation" of passive sinking of urban caissons, the regulation method is implemented based on a regulation system, wherein the regulation system includes: a protection box 01, which is arranged on the ground, and a circulation mechanism is arranged in the protection box 01, the protection box 01 is used for protection and limited support, and the circulation mechanism performs corresponding water circulation work to reduce the use of water resources;

[0043] The connecting mechanism is connected to the circulation mechanism, and one side of the connecting mechanism is connected with a plurality of mutually spliced ​​settling mechanisms. The connecting mechanism is connected to ensure the overall penetration, and the settling mechanism performs main body settling and peripheral limitation work.

[0044] The sedimentation mechanism includes:

[0045] The caisson body 11 is provided with a plurality of grouting holes 08 arranged horizontally in the middle, and the grouting holes 08 are connected to the internal pipe 29. The caisson body 11 is provided with a plurality of vertical holes 38 arranged in the forward direction, and the vertical holes 38 are connected to the vertical pipe 07. The caisson body 11 is made of reinforced concrete material to protect the periphery of the foundation pit. The grouting holes 08 and the vertical holes 38 facilitate the installation of the internal pipe 29 and the vertical pipe 07. The internal pipe 29 and the vertical pipe 07 are made of steel material and are connected. At the same time, after the installation is completed, a certain rigid support is provided;

[0046] The connection unit is arranged in the caisson body 11, and the connection unit performs the connection at the top.

[0047] The connection unit includes:

[0048] A connecting sleeve three 34 is fixedly connected to one end of the internal tube 29, and the other end of the connecting sleeve three 34 is connected to the external tube 30, and the other end of the external tube 30 is connected to a connecting sleeve four 36. The middle of the connecting sleeve four 36 is rotatably connected to the slurry tube 35, and the top of the slurry tube 35 is rotatably connected to the connecting sleeve one 31, and the connecting sleeve three 34 is connected, and the connecting sleeve three 34 is connected to the external tube 30, thereby realizing conduction with the connecting sleeve four 36 and the slurry tube 35. At the same time, the connecting sleeve four 36 can rotate outside 35, and cooperate with the bending or deformation of the external tube 30, so that the connecting sleeve three 34 can be connected to different 29 to realize conduction grouting, wherein 30 adopts a deformable pipeline similar to a gooseneck tube;

[0049] The extraction pipe 33 is arranged in the slurry pipe 35. The outer side of the extraction pipe 33 is fixedly connected with a support rod fixedly connected with the slurry pipe 35. One end of the extraction pipe 33 is rotatably sleeved with a second connection sleeve 32. The extraction pipe 33 is connected. The second connection sleeve 32 ensures the connection, so that multiple extraction pipes 33 are connected.

[0050] The excavation unit is connected to the extraction pipe 33 at the bottom, and performs the excavation of the main body.

[0051] The mining unit includes:

[0052] The platform ring 09 is fixedly connected with a plurality of conducting pipes 39, one end of which extends into the vertical hole 38 at the bottom for connection. The platform ring 09 shields the periphery, and the conducting pipes 39 are connected with the vertical holes 38 in the caisson body 11 to realize the conduction of high-pressure water for subsequent transmission;

[0053] The rotating column 40 is rotatably sleeved on the bottom end of the conducting tube 39. A plurality of fixed nozzles 41 are fixedly connected to the outer side of the rotating column 40. The rotating column 40 ensures the installation of the fixed nozzles 41 to ensure the subsequent high-pressure injection.

[0054] The power box 45 is fixedly connected to the rotating column 40, the input end of the power box 45 is connected to the feed pipe 48 connected to the conducting pipe 39, the power output end of the power box 45 is transmission-connected to the transmission box 2 46, the output end of the transmission box 2 46 is transmission-connected to the transmission box 1 44, the output end of the transmission box 1 44 is connected to the pumping column 47, and the other end of the pumping column 47 is fixedly connected to the moving nozzle 42 slidably sleeved with the fixed nozzle 41. The high-pressure water flow introduced into the vertical hole 38 passes through the conducting pipe 39 and the feed pipe 48 and enters the power box 45. The power box 4 5 is equipped with a paddle, which rotates under the impetus of the water flow, thereby driving the power output end to transmit the power, and at the same time, the high-pressure water overflows through the outlet of the power box 45, enters the rotating column 40, and is further sprayed through the fixed nozzle 41 and the moving nozzle 42 to perform high-pressure washing on the surrounding soil, soften the soil structure, and make the caisson body 11 sink. At the same time, the power is output through the transmission box 2 46, etc., driving the pumping column 47 to move back and forth, and then driving the moving nozzle 42 to move periodically, impacting the surrounding area, and performing auxiliary work.

[0055] A spray hole 43 is provided on one side of the fixed nozzle 41 . The cross section of the trapezoidal ring 09 is stepped. The liquid output end of the power box 45 is located inside the trapezoidal ring 09 .

[0056] The connection mechanism includes:

[0057] The dispersion ring 04 is connected to the vertical pipe 07 at the top. One side of the dispersion ring 04 is connected to a high-pressure pipe 13 connected to the circulation mechanism. A mounting hole is provided at the bottom of the dispersion ring 04. The mounting hole cooperates with the vertical pipe 07 to realize the installation between the dispersion ring 04 and the vertical pipe 07. The high-pressure pipe 13 is fed with high-pressure water to supply water.

[0058] The dispersion sleeve 27 is connected to the connection sleeve 1 31 at the top. A slurry pipe 03 is connected to one side of the dispersion sleeve 27. A sealing cover 28 is connected to the top of the dispersion sleeve 27. The dispersion sleeve 27 is sleeved so that it is connected to the connection sleeve 1 31 and the extraction pipe 33. The slurry pipe 03 is connected to an external device to supply slurry, and then grouting is performed at the corresponding position to adjust the angle of the caisson body 11.

[0059] One end of the suction pipe 02 is connected to the circulation mechanism, and the other end of the suction pipe 02 is connected to the top connection sleeve 2 32. The suction pipe 02 pumps sewage and flows water to realize the transportation of sludge along with the operation of the circulation mechanism.

[0060] The outer side of the dispersion sleeve 27 is sleeved with a stabilizing ring 12, and a plurality of telescopic rods 06 are fixedly connected to the outer side of the stabilizing ring 12. One end of the telescopic rod 06 is connected to a support column 05. The stabilizing ring 12 is connected stably, and the telescopic rod 06 can be telescoped. At the same time, a sensor is arranged inside to measure the telescopic amount, so as to provide auxiliary support for the pipeline.

[0061] The circulation mechanism includes:

[0062] The sewage pump 17 is fixedly connected to the protection box 01, the input end of the sewage pump 17 is connected to the suction pipe 02, the output end of the sewage pump 17 is connected to the lifting pipe 26, the other end of the lifting pipe 26 is connected to the filter box 16 fixedly connected to the protection box 01, and the sewage pump 17 performs corresponding connection pumping to transfer the bottom sludge and enter the filter box 16 through the lifting pipe 26. The filter box 16 is provided with a filter plate to filter the water body. The sludge that has been initially filtered enters the guide pipe 24. Enter into the filter press 23, the guide pipe 24 is connected to the filter box 16, the other end of the guide pipe 24 is connected to the filter press 23 located in the protection box 01, the clean water pipe, one end of which is connected to the bottom of the filter box 16, and the other end is connected to the purification box 22 fixedly connected to the protection box 01, the clean water end of the filter press 23 is connected to the purification box 22, the clean water pipe is used for transfer, and then the clean water of the filter box 16 and the water in the filter press 23 enter the purification box 22 for the final filtration;

[0063] One end of the serial pipe 21 is connected to the purification box 22, and the other end is connected to the booster 20 located in the protection box 01. One end of the booster 20 is connected to the high-pressure pipe 13. The water filtered by the purification box 22 is then extracted and pressurized by the booster 20 and enters the high-pressure pipe 13 for transportation. The booster 20 is equipped with a high-pressure pump and a booster for extraction and pressurization.

[0064] A water tank 15 and a controller 14 are connected to the protection box 01. One side of the water tank 15 is connected to a one-way pipe connected to the purification box 22. The one-way pipe is connected to a flow control valve and a one-way valve. Water is stored in the water tank 15 to provide preliminary water. The controller 14 performs data processing and signal transmission on the whole.

[0065] The implementation principle of the embodiment of the present application is as follows: when working, excavation is carried out at the base layer, and then a stage-shaped ring 09 is installed in the foundation pit, and then a corresponding number of caisson bodies 11 are installed, and a dispersion ring 04, a suction pipe 02 and a dispersion sleeve 27 are installed on the top caisson body 11 to achieve connection, and then the power is turned on, so that the external water is pumped through the external water, and then enters the dispersion ring 04 through the high-pressure pipe 13, and further passes through multiple vertical pipes 07 and sealing covers 28, enters the conducting pipe 39, and then passes through the feed pipe 48 and the power box 45 to achieve driving, and high-pressure water is sprayed through the rotating column 40, the fixed nozzle 41 and the moving nozzle 42 to soften and dissolve the soil, and the caisson body 11 is lowered by the action of gravity, and at the same time, the rotating column 40 rotates and the moving nozzle 42 shakes at the same time to achieve auxiliary work, and the muddy water is flushed and accumulated in the caisson body In the body 11, after being pumped by the sewage pump 17, the internal muddy water enters the filter box 16 through the extraction pipe 33, the suction pipe 02 and the lifting pipe 26 for the first filtration, and then through the action of gravity, the cement-containing soil enters the filter press 23 through the guide pipe 24 for filter pressing. The soil is initially dried and then loaded for transportation. The clean water in the filter press 23 and the clean water in the filter box 16 enter the purification box 22 through the purification pipe for another filtration, and is pumped and pressurized by the supercharger 20 and enters the high-pressure pipe 13 to realize circulation, thereby reducing the supplement of external water and saving water resources. After the caisson main body 11 sinks to a certain angle, the dispersion ring 04 and the dispersion sleeve 27 are removed, and then other prefabricated caisson main bodies 11 are hoisted and installed on the top of the caisson main body 11, and then the dispersion ring 04 and the dispersion sleeve 27 are installed to perform circulation until it reaches the specified position. The caisson main body 11 installed at one time can be one or more.

[0066] During the sinking process of the caisson body 11, due to external factors, the caisson body 11 is relatively displaced. At this time, a special slurry can be supplied from the outside so that it passes through the slurry pipe 03 and enters the dispersion sleeve 27, and then passes through the extraction pipe 33, the external pipe 30, the connecting sleeve three 34, and the internal pipe 29 to enter the external space of the caisson body 11 for filling and support, and adjust the designated position of the caisson body 11 to ensure the dynamic balance of the caisson body 11 and simplify the process.

[0067] Embodiment 2, the sinking method comprises the following steps:

[0068] S1: Geological survey to understand the underground soil layer distribution, groundwater level and other information;

[0069] S2: Structural design, design the appropriate caisson size, shape and wall thickness according to geological conditions, dig the foundation pit in the early stage on the ground, set the size of the caisson according to the specific excavation and support needs, and prefabricate it at the designated location to meet the requirements;

[0070] S3: Install the bottom layer protection in the foundation pit, and hoist the caisson at the bottom to achieve connection, and use its own gravity to lower the caisson. The bottom layer protection is synchronized with the size of the caisson, and prefabrication is carried out in the early stage;

[0071] S4: Install the next layer of caisson, and install the control system on the caisson and make connections;

[0072] S5: Based on the measurement, fine-tune the corresponding points to balance the caisson and reach the specified parameters;

[0073] S6: inject water through a high-pressure pipe to flush and soften the soil at the bottom, allowing the main body of the caisson to continue sinking;

[0074] S7: remove part of the control system, install a new caisson body on the top caisson, and after the installation is completed, put on the removed control system to carry out the next round of caisson;

[0075] S8: Continue to make fine adjustments by grouting at the deviation locations through measurement;

[0076] S9: Remove part of the control system and fill the corresponding holes with high-strength concrete.

[0077] The slurry pipe 03 has a water injection pressure booster of 200-1000 bar, and the grouting slurry is concrete or polymer filling material.

[0078] The implementation principle of the embodiment of the present application is:

[0079] Through the corresponding sinking method, the corresponding sinking adjustment is realized to ensure the verticality and stability of the caisson body 11 and to ensure the subsequent use.

[0080] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A sinking method of passive sinking "active regulation" of urban caisson, characterized in that: The following steps are involved: S1: Geological survey to understand the underground soil layer distribution, groundwater level and other information; S2: Structural design, designing appropriate caisson size, shape and wall thickness according to geological conditions, and excavating the preliminary foundation pit on the ground; S3: Install bottom protection in the foundation pit, hoist the caisson at the bottom, connect it, use its own gravity to lower the caisson, and adjust the system to destroy the bottom soil so that the caisson can continue to descend; S4: Install the next layer of caisson, and install the control system on the caisson and make connections; S5: Based on the measurement, fine-tune the corresponding points to balance the caisson and reach the specified parameters; S6: Water is injected through the control system to flush and soften the soil at the bottom again, so that the caisson continues to sink; S7: remove part of the control system, install a new caisson on the top caisson, and after the installation is completed, put on the removed control system to carry out the next round of caisson; S8: Continue to make fine adjustments by grouting at the deviation locations through measurement; S9: remove part of the control system and fill the corresponding holes with high-strength concrete; The control method is implemented based on a control system; Wherein, the control system comprises: A protection box is arranged on the ground, and a circulation mechanism is arranged in the protection box; The connecting mechanism is connected to the circulation mechanism, and one side of the connecting mechanism is connected to a plurality of mutually spliced ​​settling mechanisms.

2. A method for passive sinking of an urban caisson by "active regulation" as claimed in claim 1, characterized in that: The sinking mechanism comprises: The caisson body has a plurality of grouting holes arranged transversely in the middle thereof, the grouting holes are connected to internal pipes, and the caisson body has a plurality of vertical holes arranged in the forward direction, the vertical holes are connected to vertical pipes; A connecting unit is arranged in the caisson body; The connecting unit comprises: A connecting sleeve three is fixedly connected to one end of the inner tube, the other end of the connecting sleeve three is connected to the outer tube, the other end of the outer tube is connected to a connecting sleeve four, the middle of the connecting sleeve four is rotatably connected to a slurry tube, and the top end of the slurry tube is rotatably connected to the connecting sleeve one; An extraction pipe is arranged in the slurry pipe, the outer side of the extraction pipe is fixedly connected to a support rod fixedly connected to the slurry pipe, and one end of the extraction pipe is rotatably sleeved with a connecting sleeve 2; An excavation unit is connected to the bottom-most extraction pipe.

3. A sinking method of passive sinking "active regulation" of urban caisson as claimed in claim 2, characterized in that: The excavation unit comprises: A stage-shaped ring, on which a plurality of conducting tubes are fixedly connected, one end of each conducting tube extending into a vertical hole at the bottom for connection; A rotating column is rotatably sleeved on the bottom end of the conducting tube, and a plurality of fixed nozzles are fixedly connected to the outer side of the rotating column; A power box is fixedly connected in the rotating column, the input end of the power box is connected to a feed pipe connected to the conducting pipe, the power output end of the power box is transmission-connected to a transmission box 2, the output end of the transmission box 2 is transmission-connected to a transmission box 1, the output end of the transmission box 1 is connected to a pumping column, and the other end of the pumping column is fixedly connected to a moving nozzle slidably sleeved with a fixed nozzle.

4. A sinking method of passive sinking "active regulation" of urban caisson as claimed in claim 3, characterized in that: A spray hole is arranged on one side of the fixed nozzle, the cross section of the trapezoidal ring is stepped, and the liquid output end of the power box is located inside the trapezoidal ring.

5. A sinking method of passive sinking "active regulation" of urban caisson as claimed in claim 1, characterized in that: The connecting mechanism comprises: A dispersion ring connected to the vertical pipe at the top, one side of the dispersion ring is connected to a high-pressure pipe connected to the circulation mechanism; A dispersion sleeve is connected to the connection sleeve at the top, a slurry pipe is connected to one side of the dispersion sleeve, and a sealing cover is connected to the top of the dispersion sleeve; One end of the suction pipe is connected to the circulation mechanism, and the other end of the suction pipe is connected to the connecting sleeve 2 at the top.

6. A sinking method of passive sinking "active regulation" of urban caisson as claimed in claim 1, characterized in that: The outer side of the dispersion sleeve is sleeved with a stabilizing ring, the outer side of the stabilizing ring is fixedly connected with a plurality of telescopic rods, and one end of the telescopic rod is connected with a supporting column.

7. A sinking method of passive sinking "active regulation" of urban caisson as claimed in claim 1, characterized in that: The circulation mechanism comprises: A sewage pump is fixedly connected to the protection box, the input end of the sewage pump is connected to the suction pipe, the output end of the sewage pump is connected to a lifting pipe, and the other end of the lifting pipe is connected to a filter box fixedly connected to the protection box; A flow guide pipe connected to the filter box, the other end of which is connected to a filter press located in the protection box; A clean water pipe, one end of which is connected to the bottom of the filter box, and the other end of which is connected to a purification box fixedly connected to the protection box, and the clean water end of the filter press is connected to the purification box; One end of the series pipe is connected to the purification box, and the other end is connected to a booster located in the protection box, and one end of the booster is connected to the high-pressure pipe.

8. A method for passive sinking of an urban caisson by "active regulation" as claimed in claim 7, characterized in that: A water tank and a controller are connected in the protection box, one side of the water tank is connected to a one-way pipe connected to the purification box, and a flow control valve and a one-way valve are connected to the one-way pipe.

9. A method for passive sinking of an urban caisson by "active regulation" as claimed in claim 1, characterized in that: The slurry pipe water injection pressure booster is 200-1000 bar, and the grouting slurry is concrete or polymer filling material.

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