Auxiliary sinking device for large-structure open caisson

Abstract

The utility model relates to the field of sinking devices, in particular to a large-structure open caisson auxiliary sinking device which comprises an open caisson and an auxiliary assembly. An auxiliary assembly used for assisting the body in sinking is installed at the outer end of the open caisson. The auxiliary assembly comprises a conveying plate, a connecting hose, a conveying pipe, a cement frame, a supporting plate, a connecting block, a vertical detection head and a supporting column. A plurality of groups of transmission plates are arranged between the open caisson and the soil body to inject thixotropic slurry or lubricating liquid, and the thixotropic slurry or the lubricating liquid is uniformly distributed on the outer wall of the open caisson through the flowing grooves, so that a soil layer has certain flowability, and the sinking difficulty caused by overlarge frictional resistance between the well wall and the soil body is reduced; the open caisson can rapidly and evenly sink to the designed elevation, the sinking time is effectively controlled, effective sinking of the open caisson is guaranteed, the perpendicularity of the open caisson is monitored in real time in an auxiliary mode through the perpendicular detection head, the inclination condition of the open caisson is found in time, deviation correction treatment is conducted in time in the sinking process of the open caisson, and the construction risk caused by deviation of the open caisson is reduced.

Description

Technical Field

[0001] This utility model relates to the field of sinking devices, and in particular to an auxiliary sinking device for large structure caissons. Background Technology

[0002] Large-structure caissons are cylindrical structures primarily used for constructing underground structures and deep foundations. They sink to the design elevation by their own weight, overcoming the frictional resistance of the caisson walls. After being sealed with concrete and the boreholes filled, they become the foundation of the structure. The caisson sinking device utilizes an air-assisted mud suction machine to address the earthwork excavation during the sinking process. Thixotropic mud is injected into the outer wall of the caisson to reduce frictional resistance between the wall and the soil. Once the caisson reaches the design elevation, the mud solidifies over a period of time, maintaining the stability of the caisson, reducing ground subsidence near the caisson, and allowing the large-structure caisson to sink smoothly to the design elevation, while also improving construction efficiency and safety.

[0003] In existing sinking devices, the cutting edge and a section of the well wall of the caisson are usually prefabricated on the ground during the sinking process. However, due to the uneven hardness of the soil under the cutting edge of the caisson during sinking, the caisson is prone to displacement, resulting in uneven stress on the caisson structure, affecting its stability and safety, and increasing construction risks.

[0004] Therefore, for the existing sinking devices, the cutting edge and a section of the caisson wall are usually prefabricated on the ground. However, due to the uneven hardness of the soil under the cutting edge during sinking, the caisson is prone to displacement, leading to uneven stress on the caisson structure. Without timely correction, its stability and safety are affected, increasing construction risks. A large-structure auxiliary sinking device can be designed, with flow channels evenly distributed on the outer wall of the caisson, giving the soil a certain degree of fluidity and reducing sinking difficulties caused by excessive frictional resistance between the caisson wall and the soil. A vertical detection head assists in real-time monitoring of the caisson's verticality, promptly detecting any tilting and allowing for timely correction during sinking. This rapidly increases the construction speed of the caisson while ensuring construction quality, preventing excessive displacement, and ensuring construction safety. Utility Model Content

[0005] To overcome the problems of existing sinking devices, the cutting edge and a section of the well wall of the caisson are usually prefabricated on the ground. However, during the sinking process, the soil under the cutting edge of the caisson is uneven in hardness, which makes the caisson prone to displacement. This leads to uneven stress on the caisson structure. If the deviation is not corrected in time, it will affect its stability and safety and increase the construction risk.

[0006] The technical solution of this utility model is as follows: a large structure caisson auxiliary sinking device, including a caisson and auxiliary components; the outer end of the caisson is equipped with auxiliary components for assisting the sinking of the main body, the auxiliary components include a transmission plate, a connecting hose, a transmission pipe, a cement frame, a support plate, a connecting block, a vertical detection head, and a support column. Multiple sets of injection grooves are opened at the outer end of the caisson, and multiple sets of flow grooves are opened on the outer wall of the caisson. Each set of injection grooves is equipped with a transmission plate inside, and multiple sets of discharge holes are opened inside the transmission plates. A connector is fixedly provided at one end of each set of transmission plates, and a connecting hose is connected inside the connector. A transmission pipe is provided at one end of the connector.

[0007] Preferably, by installing multiple sets of transfer plates between the caisson and the soil to inject thixotropic mud or lubricating liquid, which is evenly distributed on the outer wall of the caisson through a flow channel, the soil layer has a certain fluidity, reducing the difficulty of sinking caused by excessive frictional resistance between the caisson wall and the soil. This allows the caisson to sink quickly and evenly to the design elevation, effectively controlling the sinking time and ensuring the effective sinking of the caisson. Furthermore, a vertical detection head is used to assist in real-time monitoring of the verticality of the caisson, promptly detecting any tilting and correcting it during the sinking process. This rapidly increases the construction speed of the caisson while ensuring the construction quality, avoiding excessive caisson deviation, reducing construction risks caused by caisson deviation, and ensuring construction safety. By pouring cement frames and placing heavy blocks to assist the sinking of the caisson, the self-weight of the caisson is increased. Adjusting the number and distribution of the heavy blocks allows for precise control of the sinking depth of the caisson, avoiding over-sinking or under-sinking, and ensuring that the caisson sinks to the predetermined design depth.

[0008] Preferably, the inner wall of the caisson is provided with multiple sets of support plates, the upper end of the support plates is welded with a connecting block, and the outer end of the connecting block is fixed with a vertical detection head.

[0009] Preferably, a reinforcing plate is fixed between multiple sets of support plates, and two sets of support columns are provided inside the multiple sets of support plates. A limiting ring is welded to the outer end of the support column at the connection with the support plate.

[0010] Preferably, one end of the multiple sets of connectors is provided with a threaded head, which is threaded to the connector, and a through hole is provided inside the threaded head.

[0011] As a preferred option, the upper end of the caisson is cast with multiple sets of cement frames, and multiple sets of weight blocks are fixed inside the cement frames.

[0012] Preferably, one end of the transmission pipe is fixedly provided with a docking plate, and the docking plate has multiple sets of connection holes inside, and the docking plate is connected to the transmission pipe.

[0013] Preferably, the support plate has a connection hole inside to accommodate the support column, and the support plate is fixedly connected to the support column by a limiting ring.

[0014] The beneficial effects of this utility model are:

[0015] 1. Compared to traditional auxiliary sinking devices, this method involves installing multiple sets of transmission plates between the caisson and the soil to inject thixotropic mud or lubricating liquid. This liquid is then evenly distributed on the outer wall of the caisson through a flow channel, giving the soil a certain degree of fluidity. This reduces sinking difficulties caused by excessive frictional resistance between the caisson wall and the soil, allowing the caisson to sink quickly and evenly to the design elevation. This effectively controls the sinking time and ensures the effective sinking of the caisson. Furthermore, a vertical detection head is used to assist in real-time monitoring of the caisson's verticality, promptly detecting any tilting and correcting it during the sinking process. This rapidly increases the construction speed of the caisson while ensuring construction quality, preventing excessive caisson deviation, reducing construction risks caused by caisson deviation, and ensuring construction safety. By pouring cement frames and placing weights to assist in the sinking, the caisson's self-weight is increased. Adjusting the number and distribution of weights allows for precise control of the sinking depth, preventing over-sinking or under-sinking, and ensuring the caisson sinks to the predetermined design depth. Attached Figure Description

[0016] Figure 1 The diagram shown is a schematic representation of the overall structure of the auxiliary sinking device for large-structure caissons of this utility model.

[0017] Figure 2 The diagram shown is a schematic representation of the transmission plate structure of the large-structure caisson auxiliary sinking device of this utility model.

[0018] Figure 3 The diagram shown is a schematic representation of the vertical detection head structure of the large-structure caisson auxiliary sinking device of this utility model.

[0019] Figure 4 The diagram shown is a schematic representation of the support column structure of the auxiliary sinking device for large-structure caissons of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Caisson; 201. Transmission plate; 202. Connecting joint; 203. Connecting hose; 204. Threaded head; 205. Transmission pipe; 206. Connecting plate; 207. Cement frame; 208. Weight block; 209. Support plate; 210. Connecting block; 211. Vertical detection head; 212. Support column; 213. Limiting ring; 214. Reinforcing plate. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Large-structure caissons are a type of structure used for constructing underground structures and deep foundations. They are created by constructing a well-like structure on the ground surface, and then, with the well walls enclosed, soil is continuously excavated from within, causing the caisson to gradually sink under its own weight and the load from above. Once it reaches the design elevation, the bottom is sealed and the holes are filled, ultimately forming a well-like structure that serves as the foundation for the structure. They are used in bridge pier foundations, underground pump rooms, water tanks, oil depots, mining shafts, as well as foundations for large equipment, high-rise and super high-rise buildings, etc. They are suitable for various soil types, such as silt, sand, clay, and gravelly sand. The caisson structure design must have sufficient strength and rigidity to ensure anti-buoyancy stability during construction and use. Large-structure caissons are widely used in deep foundations or underground structures due to their advantages such as large burial depth, strong integrity, and good stability.

[0023] Large-structure caisson auxiliary sinking devices are a collective term for a series of technologies and equipment designed to help caissons reach the predetermined depth more smoothly, efficiently, and safely during the sinking process. These devices, including asymmetric caisson assistance, offer several key advantages, such as improved ease of caisson construction, adjustment of sinking speed, reduced difficulty in quality control, early warning systems, and shorter construction cycles. These devices allow for more effective control of the caisson sinking process, especially in strata with uneven soil hardness and significant strength differences, preventing structural tilting, displacement, or even overturning, thus improving the safety of the construction project.

[0024] Although there are many large-structure caisson auxiliary sinking devices on the market, they still face some problems and challenges in practical applications. Existing sinking devices usually have the caisson's cutting edge and a section of the caisson wall prefabricated on the ground. During the sinking process, the soil under the caisson's cutting edge is uneven in hardness, which can easily cause the caisson to deviate. This leads to uneven stress on the caisson structure. If the deviation is not corrected in time, it will affect its stability and safety and increase construction risks.

[0025] Please see Figures 1-4This utility model provides an embodiment of a large structure caisson auxiliary sinking device, including a caisson 1 and auxiliary components; the outer end of the caisson 1 is equipped with auxiliary components for assisting the sinking of the main body, the auxiliary components include a transmission plate 201, a connecting hose 203, a transmission pipe 205, a cement frame 207, a support plate 209, a connecting block 210, a vertical detection head 211, and a support column 212. The outer end of the caisson 1 is provided with multiple sets of injection grooves, and the outer wall of the caisson 1 is provided with multiple sets of flow grooves. Each set of injection grooves is provided with a transmission plate 201 inside, and the transmission plate 201 is provided with multiple sets of discharge holes inside. One end of each set of transmission plates 201 is fixedly provided with a connector 202, the connector 202 is connected to the connecting hose 203, and one end of the connector 202 is provided with a transmission pipe 205.

[0026] Please see Figures 1-2 In this embodiment, the inner wall of the caisson 1 is provided with multiple sets of support plates 209. A connecting block 210 is welded to the upper end of each support plate 209, and a vertical detection head 211 is fixed to the outer end of the connecting block 210. By using the vertical detection head 211 to assist in real-time monitoring of the verticality of the caisson 1, the tilt of the caisson 1 can be detected in a timely manner, and timely correction can be performed during the sinking process of the caisson 1. This not only rapidly improves the construction speed of the caisson 1 but also ensures the construction quality of the caisson 1, avoids excessive displacement of the caisson 1, reduces construction risks caused by the displacement of the caisson 1, and ensures construction safety. Multiple sets of support plates 209 are fixedly connected... The structure includes a reinforcing plate 214 and multiple sets of support plates 209, each with two sets of support columns 212 inside. A limiting ring 213 is welded to the outer end of the support column 212 at the connection point with the support plate 209. By using the support columns 212 to connect the support plates 209, supports are added sequentially according to the sinking depth of the caisson 1, thereby increasing the stability of the structure and preventing the caisson 1 from tilting or deforming due to soil pressure or other external forces during the sinking process. Furthermore, the addition of supports according to the sinking depth adapts to the construction needs at different depths, ensuring that the caisson 1 can be effectively supported and protected at each stage, thus improving the overall stability.

[0027] Please see Figures 1-3In this embodiment, one end of each set of connectors 202 is provided with a threaded head 204. The threaded head 204 is threadedly fixed to the connector 202. The threaded head 204 has a through hole inside. After the caisson 1 is lowered, the threaded head 204 is threadedly connected to the transmission plate 201 to adapt to the lubrication work of the caisson 1 at different depths and to meet the needs of different stages of lowering. This ensures that the caisson 1 is effectively lubricated at all depths. The upper end of the caisson 1 is cast with multiple sets of cement frames 207. Multiple sets of weight blocks 208 are fixed inside the cement frames 207. By casting the cement frames 207 and placing the weight blocks 208, the caisson 1 is lowered, increasing its self-weight. The number and distribution of the weight blocks 208 are adjusted to precisely control the lowering depth of the caisson 1, avoiding excessive or insufficient lowering, and ensuring that the caisson 1 is lowered to the predetermined design depth.

[0028] Please see Figures 2-4 In this embodiment, a docking plate 206 is fixedly provided at one end of the transmission pipe 205. The docking plate 206 has multiple sets of connection holes inside. The docking plate 206 is connected to the transmission pipe 205. By using the docking plate 206 to seal the transmission pipe 205, the mud or lubricating fluid is transmitted. The reasonable arrangement of the transmission pipe 205 can control the distribution of mud or lubricating fluid, which helps to control the sinking direction and attitude of the caisson 1 and adapt to the construction requirements. The support plate 209 has a connection hole inside to accommodate the support column 212. The support plate 209 is fixedly connected to the support column 212 through the limiting ring 213. By using the limiting ring 213 to limit the support plate 209 to prevent it from shaking and shifting, the sinking speed and sinking distance of the caisson 1 are effectively controlled, avoiding sudden sinking, over-sinking and other situations, ensuring the safe and stable sinking of the caisson 1, and ensuring construction safety.

[0029] During the work, firstly, when caisson 1 is lowered, multiple sets of transmission plates 201 are installed between caisson 1 and the soil to inject thixotropic mud or lubricating fluid. Transmission pipes 205 are connected via connecting plates 206 to facilitate the transmission of mud or lubricating fluid. The distribution of mud or lubricating fluid is controlled by the reasonable arrangement of transmission pipes 205. The mud or lubricating fluid is evenly distributed on the outer wall of caisson 1 through a flow channel, giving the soil a certain degree of fluidity and reducing the difficulty of lowering caused by excessive frictional resistance between the caisson wall and the soil. This allows caisson 1 to sink quickly and evenly to the design elevation, effectively controlling the lowering time. During the slow lowering of caisson 1, a vertical detection head 211 is used to assist in real-time monitoring of the verticality of caisson 1, promptly detecting any tilting and correcting it during the lowering process. This significantly improves the construction speed of caisson 1. To ensure the construction quality of caisson 1, prevent excessive displacement of caisson 1, reduce construction risks caused by displacement of caisson 1, and ensure construction safety, when the descent speed of caisson 1 is slow, multiple sets of cement frames 207 are poured at the top of caisson 1, and multiple sets of weight blocks 208 are placed inside the cement frames 207 to increase the self-weight of caisson 1. The number and distribution of weight blocks 208 are adjusted to precisely control the sinking depth of caisson 1, avoiding excessive or insufficient sinking, and ensuring that caisson 1 sinks to the predetermined design depth. Support columns 212 are used to connect support plates 209 to add support sequentially according to the sinking depth of caisson 1, to prevent caisson 1 from tilting or deforming due to soil pressure or other external forces during the sinking process. This adapts to the construction needs of different depths, ensuring that caisson 1 can be effectively supported and protected at each stage, and realizing the auxiliary sinking work of the large structure caisson 1.

[0030] Through the above steps, by installing multiple sets of transmission plates 201 between the caisson 1 and the soil, thixotropic mud or lubricating liquid is injected and evenly distributed on the outer wall of the caisson 1 through a flow channel, giving the soil a certain degree of fluidity. This reduces the difficulty of sinking caused by excessive frictional resistance between the caisson wall and the soil, allowing the caisson 1 to sink quickly and evenly to the design elevation. This effectively controls the sinking time and ensures the effective sinking of the caisson 1. Furthermore, the verticality of the caisson 1 is monitored in real time using a vertical detection head 211 to promptly detect any tilting and correct it during the sinking process. This not only rapidly increases the construction speed of the caisson 1 but also ensures the construction quality, preventing excessive deviation of the caisson 1 and reducing construction risks caused by deviation, thus ensuring construction safety. By pouring a cement frame 207 and placing weight blocks 208 to assist the sinking of the caisson 1, the self-weight of the caisson 1 is increased. Adjusting the number and distribution of the weight blocks 208 precisely controls the sinking depth of the caisson 1, avoiding over-sinking or under-sinking, and ensuring that the caisson 1 sinks to the predetermined design depth.

Claims

1. A large-structure caisson auxiliary sinking device, comprising a caisson (1); characterized in that: It also includes auxiliary components; the outer end of the caisson (1) is equipped with auxiliary components for assisting the sinking of the main body. The auxiliary components include a transmission plate (201), a connecting hose (203), a transmission pipe (205), a cement frame (207), a support plate (209), a connecting block (210), a vertical detection head (211), and a support column (212). The outer wall of the caisson (1) is provided with multiple sets of injection grooves and multiple sets of flow grooves. The interior of each set of injection grooves is provided with a transmission plate (201). The interior of the transmission plate (201) is provided with multiple sets of discharge holes. One end of each set of transmission plates (201) is fixedly provided with a connector (202). The interior of the connector (202) is connected with a connecting hose (203). One end of the connector (202) is provided with a transmission pipe (205).

2. The auxiliary sinking device for large-structure caissons according to claim 1, characterized in that: The inner wall of the caisson (1) is provided with multiple sets of support plates (209), and a connecting block (210) is welded to the upper end of the support plate (209). A vertical detection head (211) is fixed to the outer end of the connecting block (210).

3. The auxiliary sinking device for large-structure caissons according to claim 2, characterized in that: A reinforcing plate (214) is fixed between multiple sets of support plates (209). Two sets of support columns (212) are provided inside the multiple sets of support plates (209). A limiting ring (213) is welded to the outer end of the support column (212) at the connection with the support plate (209).

4. The auxiliary sinking device for large-structure caissons according to claim 3, characterized in that: One end of the multiple sets of connectors (202) is provided with a threaded head (204), the threaded head (204) is threadedly fixed to the connector (202), and a through hole is provided inside the threaded head (204).

5. The auxiliary sinking device for large-structure caissons according to claim 4, characterized in that: The upper end of the caisson (1) is cast with multiple sets of cement frames (207), and multiple sets of weight blocks (208) are fixed inside the multiple sets of cement frames (207).

6. The auxiliary sinking device for large-structure caissons according to claim 4, characterized in that: One end of the transmission pipe (205) is fixedly provided with a docking plate (206), and the docking plate (206) has multiple sets of connection holes inside, and the docking plate (206) is connected to the transmission pipe (205).

7. The auxiliary sinking device for large-structure caissons according to claim 3, characterized in that: The support plate (209) has a connection hole for accommodating the support column (212) inside. The support plate (209) is fixedly connected to the support column (212) through a limiting ring (213).

Images