Open caisson settlement control mechanism

Abstract

The utility model discloses an open caisson settlement control mechanism which comprises an open caisson body arranged in a foundation, a plurality of bottom plates arranged in the radial direction are evenly distributed on the open caisson body in the circumferential direction of the open caisson body, the front end of each bottom plate points to the open caisson body, and the top face of the front end of each bottom plate is provided with a forward extending frame with the same arrangement direction as the corresponding bottom plate. The top face of the rear end of the bottom plate is provided with a fixing seat, the top of the fixing seat is provided with a bearing and a transmission shaft coaxially fixed to the bearing, the transmission shaft is provided with a winding drum coaxially fixed to the transmission shaft, and the rear end of the bottom plate is provided with a base connected with the bottom plate. A motor and a speed reducer connected with the power output end of the motor are arranged on the base, the power output end of the speed reducer is connected with the transmission shaft, a steel cable is wound around the winding drum, and one end of the steel cable bypasses the guide wheel and is provided with a towing hook supporting the bottom of the open caisson body. The open caisson settlement control device has the advantages of accurately controlling the settlement amount of the open caisson and avoiding excessive settlement, and can be widely applied to the technical field of open caisson construction.

Description

Technical Field

[0001] The utility model relates to the technical field of open caisson construction, in particular to an open caisson settlement control mechanism. Background Technique

[0002] An open caisson is a well - shaped structure. It excavates soil inside the well and sinks to the designed elevation by relying on its own gravity to overcome the frictional resistance of the well wall. Then, after concrete bottom sealing and filling the well hole, it becomes the foundation of a bridge pier or other structures. Generally, it is used in the construction of large - scale bridge pier foundations, sewage pumping stations, large - scale equipment foundations, civil air defense shelters, shield assembly wells, and the construction of retaining devices for underground lanes and stations' hydraulic foundations.

[0003] Currently, when an open caisson sinks, it excavates soil inside and then sinks by using its own weight. The amount of excavated soil and the thickness of the soil layer directly affect the sinking amount of the open caisson. Although the thickness of the excavated soil can be accurately controlled by measurement, it is difficult to deal with the soil layer conditions. This leads to the situation that when the soil layer is unstable, the open caisson sinks excessively beyond the elevation, affecting the construction. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the above - mentioned background technique and provide an open caisson settlement control mechanism to accurately control the settlement amount of the open caisson and avoid the situation of excessive sinking.

[0005] An open caisson settlement control mechanism provided by the utility model includes an open caisson body arranged in the foundation. A plurality of bottom plates arranged radially are evenly distributed along the circumferential direction of the open caisson body. The front end of each bottom plate points to the open caisson body, and a front - extending frame with the same setting direction as the bottom plate is provided on the front - end top surface. A rotating shaft and a guide wheel coaxially arranged with the rotating shaft are respectively provided on the front - extending frame. A fixed seat is provided on the rear - end top surface of the bottom plate. A bearing and a transmission shaft coaxially fixed with the bearing are provided on the top of the fixed seat. A winding drum coaxially fixed with the transmission shaft is provided on the transmission shaft. A base connected to the rear - end of the bottom plate is provided. A motor and a reducer connected to the power output end of the motor are provided on the base. The power output end of the reducer is connected to the transmission shaft. A steel cable is wound around the winding drum. One end of the steel cable bypasses the guide wheel and is provided with a drag hook for supporting the bottom of the open caisson body.

[0006] In the above - mentioned technical solution, the control ends of all motors are provided with the same synchronous controller.

[0007] In the above - mentioned technical solution, a worm gear coaxially fixed with the transmission shaft is provided on the transmission shaft. A worm is provided at the power output end of the reducer. The worm gear and the worm are meshed to form a worm - gear assembly. A shaft seat corresponding to the worm is provided on the fixed seat. A bearing coaxially fixed with the worm is provided on the shaft seat.

[0008] In the above technical solution, a casing coaxial with the cable is provided on the outer edge of the cable between the guide pulley and the drum, and a bracket fixedly connected to the bottom plate is provided at the bottom of the casing.

[0009] In the above technical solution, the bracket is in an "Λ" - shaped structure.

[0010] In the above technical solution, there are multiple brackets, and the multiple brackets are arranged along the length direction of the bottom plate.

[0011] In the above technical solution, a plurality of embedded seats are evenly distributed along the length direction at the bottom of the bottom plate, and the embedded seats are arranged in the foundation.

[0012] In the above technical solution, a groove is provided in the middle of the tow hook, and a rubber pad is provided on the side wall and the top surface of the groove.

[0013] The settlement control mechanism of the caisson of the present utility model has the following beneficial effects:

[0014] 1. The control device forms a support for the bottom of the caisson through the cable. When the caisson sinks, the sinking depth is controlled by the released length of the cable, and the settlement amount of the caisson can be accurately controlled to avoid the situation of excessive sinking.

[0015] 2. The control device forms an encircling protection for the cable through the casing. When the cable accidentally breaks, it can prevent the cable from being thrown out and injuring people to ensure safety.

[0016] 3. The control device drives the rotation of the drum through the transmission structure of the worm and worm gear. The worm and worm gear have a self - locking structure, which can prevent the self - rotation of the drum. Description of the Drawings

[0017] Figure 1 It is the top view of the overall structure of the caisson settlement control mechanism of the present utility model;

[0018] Figure 2 It is the structural schematic diagram of the main structure of the caisson settlement control mechanism of the present utility model;

[0019] Figure 3 It is the structural schematic diagram of the power and transmission part in the caisson settlement control mechanism of the present utility model;

[0020] Figure 4 It is the overall structural sectional view of the caisson settlement control mechanism of the present utility model. Detailed Description of the Embodiment

[0021] The present utility model will be further described in detail below in conjunction with the drawings and embodiments, but the embodiments should not be construed as limiting the present utility model.

[0022] Please refer to Figures 1-4, the settlement control device of the utility model caisson includes a caisson body 2 constructed in the foundation 1. A plurality of hanging hooks 3 are evenly arranged at the bottom of the caisson body 2. A rubber pad 19 is installed at the position where the top surface of the hanging hook 3 is in contact with the bottom of the caisson body 1. A bottom plate 9 is arranged on the foundation 1 around the caisson body 2. A front extension frame 5 is welded and installed on the top surface of the front end of the bottom plate 9. A guide wheel 4 is installed at the front end of the front extension frame 5. A fixed seat 8 is welded and installed at a position near the rear end on the top surface of the bottom plate 9. A winding drum 7 is installed on the fixed seat 8. A transmission shaft 12 is installed on the fixed seat 8 by bearing sleeving, and the transmission shaft 12 is welded and fixed to one end of the winding drum 7;

[0023] The transmission shaft 12 is in transmission connection with a reducer 15, and the reducer 15 is in transmission connection with a motor 16. The reducer 15 and the motor 16 are both installed on the top surface of the bottom plate 9 at corresponding positions. A steel cable 6 is wound around the winding drum 7. One end of the steel cable 6 is wound around the guide wheel 4 and fixed to the hanging hook 3.

[0024] When the settlement of the settlement body 2 is carried out, by controlling the operation of the motor 16, the winding drum 7 is driven to rotate to release the steel cable 6, so that the caisson body 2 sinks under its own weight. The settlement amount control of the caisson body 2 can be directly controlled by the released length of the steel cable 6. Compared with the existing method of excavating soil inside the caisson body 2 for settlement, the settlement amount control is more accurate, and it is also easy to maintain the vertical stability of the caisson body 2. After the construction of the caisson body 2 is completed, the steel cable 6 above the foundation 1 can be cut off.

[0025] In this embodiment, the steel cable 6 between the winding drum 7 and the guide wheel 4 is sleeved in a sleeve 17. A support 18 is welded and installed on the sleeve 17, and the support 18 is welded and fixed to the corresponding position on the top surface of the bottom plate 9.

[0026] The sleeve 17 is used to protect the steel cable 6. When the steel cable 6 accidentally breaks, it can prevent the broken steel cable 6 from being thrown out and hurting people.

[0027] In this embodiment, a worm gear 11 is welded and installed on the transmission shaft 12, a worm 13 is installed on the reducer 15 in a transmission manner, the worm gear 11 is in transmission engagement with the worm 13, and a shaft seat 14 is also welded and installed on the fixed seat 8 at the position corresponding to the worm 13. The end of the worm 13 far from the reducer 15 is sleeved on the bearing of the shaft seat 14 and fixed.

[0028] Through the transmission of the worm gear and worm structure, when the motor 16 operates, the worm 13 is driven to rotate, and then the worm gear 11 is driven to rotate. When the motor 16 stops, when the worm gear 11 is pulled and rotated by the weight of the caisson body 2, it cannot drive the worm 13 to rotate, thus forming a self-locking structure.

[0029] In this embodiment, a plurality of embedded seats 10 are arranged at the bottom of the bottom plate 9. The embedded seats 10 are formed by cement pouring in the foundation 1, and the bottom plate 9 is supported by the top surface of the embedded seats 10.

[0030] The embedded base 10 provides more reliable stability for the floor slab 9 to land on, and at the same time provides a support point for the floor slab 9 to keep its position fixed.

[0031] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and its equivalent technologies, the present utility model is also intended to include these modifications and variations.

[0032] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

Claims

1. A caisson settlement control mechanism, comprising a caisson body (2) arranged in a foundation (1), characterized in that: The caisson body (2) is evenly distributed along its circumference with a plurality of radially arranged bottom plates (9), the front end of each bottom plate (9) pointing to the caisson body (2), and the top surface of the front end is provided with a forward extension frame (5) in the same direction as the bottom plate (9), the forward extension frame (5) is respectively provided with a rotating shaft and a guide wheel (4) arranged coaxially with the rotating shaft, the top surface of the rear end of the bottom plate (9) is provided with a fixed seat (8), the top of the fixed seat (8) is provided with a bearing and a transmission shaft (12) coaxially fixed with the bearing, the transmission shaft (12) is provided with a reel (7) coaxially fixed thereto, the rear end of the bottom plate (9) is provided with a base connected thereto, the base is provided with a motor (16) and a reducer (15) connected to the power output end of the motor (16), the power output end of the reducer (15) is connected to the transmission shaft (12), a steel cable (6) is wound around the reel (7), one end of the steel cable (6) is wound around the guide wheel (4) and is provided with a towing hook (3) supporting the bottom of the caisson body (2).

2. The caisson settlement control mechanism according to claim 1, characterized in that: The motors (16) correspond to the base plates (9) one by one, and the control ends of all the motors (16) are provided with the same synchronous controller.

3. The caisson settlement control mechanism according to claim 2, characterized in that: The transmission shaft (12) is provided with a worm wheel (11) coaxially fixed thereto; a worm (13) is provided at the power output end of the reducer (15); the worm wheel (11) and the worm (13) are meshed and connected to form a worm wheel assembly; the fixed seat (8) is provided with a shaft seat (14) corresponding to the worm (13); and the shaft seat (14) is provided with a bearing coaxially fixed with the worm (13).

4. The caisson settlement control mechanism according to claim 3 is characterized in that: The outer edge of the steel cable (6) between the guide wheel (4) and the drum (7) is provided with a sleeve (17) coaxially arranged therewith, and the bottom of the sleeve (17) is provided with a bracket (18) fixedly connected to the bottom plate (9).

5. The caisson settlement control mechanism according to claim 4, characterized in that: The support (18) has an "Λ"-shaped structure.

6. The caisson settlement control mechanism according to claim 5, characterized in that: There are a plurality of brackets (18), and the plurality of brackets (18) are arranged along the length direction of the bottom plate (9).

7. The caisson settlement control mechanism according to claim 6, characterized in that: A plurality of embedded seats (10) are evenly distributed along the length direction at the bottom of the base plate (9), and the embedded seats (10) are arranged in the foundation (1).

8. The caisson settlement control mechanism according to claim 6, characterized in that: A groove is provided in the middle of the towing hook (3), and the side wall and top surface of the groove are provided with a same rubber pad.

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