A posture adjusting device for sinking a caisson

Abstract

The utility model discloses a kind of attitude adjusting devices for sinking well sinking. Including multiple force supports, multiple pressurizing mechanisms for pressing the force support and soil taking device. The multiple force supports are detachably connected on the outside wall of sinking well, and are spaced along the circumferential direction of the sinking well. The multiple pressurizing mechanisms are spaced along the circumferential direction of sinking well on the outside of sinking well. The multiple pressurizing mechanisms and the multiple force supports are same in number and one-to-one corresponding arrangement. The soil taking device is used for soil taking inside the sinking well. The attitude adjusting device provided in the application can adjust the sinking attitude of sinking well in real time according to the inclination of sinking well, has good correction effect, and can avoid the problem of excessive inclination angle of well body during sinking well sinking.

Description

Technical Field

[0001] This utility model relates to the technical field of caisson construction equipment, and in particular to a posture adjustment device for caisson sinking. Background Technology

[0002] A caisson is a cylindrical structure. It is formed by excavating soil into the well, relying on its own weight to overcome the frictional resistance of the well wall, and sinking it to the design elevation. Then, the bottom is sealed with concrete and the well hole is filled, making it the foundation of bridge piers or other structures.

[0003] During the caisson sinking construction, it is necessary to ensure a stable sinking posture and avoid any adverse situations such as tilting, to prevent difficulties in correcting the deviation after the caisson has sunk to the design elevation. Therefore, the posture of the caisson needs to be adjusted during the sinking process. Currently, the main method for adjusting the posture of the caisson during sinking is to control the soil extraction area during construction to adjust the posture of the caisson, that is, to correct deviation. Specifically, if the caisson tilts during the actual sinking process, more soil is extracted from the side that tilts more during the following period to guide the caisson to tilt to the other side. In this way, more soil is extracted from the other side when one side tilts, and the adjustment is repeated to achieve the goal of keeping the caisson sinking as vertically as possible. Utility Model Content

[0004] The inventors discovered that existing methods for adjusting the sinking attitude of caissons are passive correction methods. When the caisson tilts too much during sinking, controlling the area where soil is removed to correct the tilt has limited effectiveness, and the success rate of returning the caisson to a vertical position is low. In view of the above problems, this invention proposes a caisson sinking attitude adjustment device to overcome or at least partially solve the aforementioned problems.

[0005] The present invention proposes an attitude adjustment device for sinking a caisson, comprising: multiple force-bearing supports, multiple pressurizing mechanisms for pressing down the force-bearing supports, and a soil-taking device.

[0006] The plurality of load-bearing supports are detachably connected to the outer wall of the caisson and are spaced apart along the circumference of the caisson.

[0007] The multiple pressurizing mechanisms are arranged at intervals along the circumference of the caisson on the outside of the caisson;

[0008] The plurality of pressurizing mechanisms and the plurality of force-bearing supports are the same in number and are arranged in a one-to-one correspondence;

[0009] The soil-taking device is used to take soil from inside the caisson.

[0010] Optionally, the pressurizing mechanism includes a fixed bracket, a pressurizing base, and a hydraulic cylinder for pressing down the force-bearing support;

[0011] The fixed support is installed on the outside of the caisson;

[0012] The pressure base is connected to the fixed bracket, and the height of the pressure base is adjustable;

[0013] The hydraulic cylinder is connected to the bottom of the pressure base.

[0014] Optionally, the fixed bracket is provided with a guide mechanism for guiding the height adjustment of the pressurized base.

[0015] Optionally, the attitude adjustment device further includes an annular guide rail, which is arranged on the outside of the caisson, and the fixed bracket is slidably mounted on the annular guide rail.

[0016] Optionally, the fixed bracket is provided with a locking mechanism for restricting the sliding of the fixed bracket.

[0017] Optionally, the annular guide rail is provided with a plurality of slots spaced apart, and the locking mechanism includes a telescopic pin located at the bottom of the fixed bracket.

[0018] Optionally, a circular pressure plate is connected to the bottom of the piston rod of the hydraulic cylinder, and the area of ​​the bottom of the circular pressure plate is larger than the area of ​​the bottom of the piston rod.

[0019] Optionally, the fixed bracket includes a bracket body and reinforcing ribs. The bracket body includes a horizontal plate and a vertical plate connected to each other, and the two ends of the reinforcing ribs are respectively connected to the horizontal plate and the vertical plate.

[0020] Optionally, it also includes multiple position sensors, which are arranged at intervals along the circumference of the caisson on the inner wall of the caisson. The number of the multiple position sensors is the same as the number of the multiple force supports and they are arranged in a one-to-one correspondence.

[0021] The beneficial effects of the above-mentioned technical solutions provided by the embodiments of this utility model include at least the following:

[0022] In the technical solution provided in this application, multiple load-bearing supports are detachably connected to the outer wall of the caisson and are spaced apart along the circumference of the caisson. Furthermore, multiple pressurizing mechanisms are installed in the same number as the load-bearing supports, and each corresponds to one of them. This allows for active adjustment of the caisson's sinking attitude throughout its entire circumference. When the caisson is found to be tilted, the side opposite the tilt direction is determined as the pressurizing side. Then, for one or more load-bearing supports near the pressurizing side, downward pressure is applied to the supports by driving the corresponding pressurizing mechanisms, causing the caisson to tend towards the correct attitude. This attitude adjustment method is an active correction method, capable of adjusting the caisson's sinking attitude in real time according to its tilt, thereby avoiding the problem of excessive tilt angle during the caisson's sinking process. Moreover, while the pressurizing mechanism is pressing down, the soil removal device of this application removes soil from the area near the pressurizing side inside the caisson, which helps guide the caisson to tilt towards the pressurizing side. Under the combined action of the pressurizing mechanism and the soil removal device, the effect of adjusting the attitude of the caisson can be greatly improved, ensuring that the caisson sinks smoothly and steadily.

[0023] Furthermore, it is worth mentioning that the attitude adjustment device of this application can be used for attitude adjustment to correct the tilt generated during the sinking of the caisson. On the other hand, when the sinking of the caisson encounters difficulties, the attitude adjustment device can also be used as an auxiliary sinking aid device for the sinking of the caisson. By using a pressurizing mechanism to press down on the side of the caisson that is difficult to sink, the sinking aid can be achieved, thus realizing the dual functions of attitude adjustment and auxiliary sinking aid for the sinking of the caisson. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the structure of an attitude adjustment device for sinking a caisson provided by this utility model;

[0026] Figure 2 A schematic diagram of the structure of the pressurizing mechanism provided by this utility model when pressing down on the force-bearing support;

[0027] Figure 3 A schematic diagram of the pressurization mechanism provided by this utility model.

[0028] Explanation of icon numbers:

[0029] 200-caisson;

[0030] 100 - Attitude adjustment device;

[0031] 1-Force-bearing support;

[0032] 2-Pressure mechanism; 21-Fixed bracket; 211-Horizontal plate; 212-Vertical plate; 213-Reinforcing rib; 214-Guide mechanism; 22-Pressure base; 23-Hydraulic cylinder; 231-Piston rod; 232-Circular pressure plate;

[0033] 3-Soil sampling device;

[0034] 4-Position sensor. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0037] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0038] Currently, the main method for adjusting the attitude of caissons during sinking is to control the soil extraction area during construction. In the actual sinking process, if the caisson tilts, more soil is extracted from the other side to guide the caisson to tilt to the other side. This process is repeated, with soil extracted from the other side to adjust the caisson's attitude as much as possible, in order to maintain the caisson's vertical sinking as much as possible.

[0039] The inventors discovered that existing methods for adjusting the sinking attitude of caissons are passive correction methods. When the caisson tilts excessively during sinking, controlling the area where soil is removed has limited effectiveness in correcting the tilt, and the success rate of returning the caisson to a vertical position is low. To address this issue, the inventors attempted to design a caisson sinking attitude adjustment device. They unexpectedly discovered that by arranging multiple load-bearing supports at intervals along the circumference of the caisson's outer wall, and then arranging corresponding pressure mechanisms at intervals along the circumference of the outer wall, applying downward pressure to the load-bearing supports on the opposite side of the tilted caisson, the sinking attitude can be actively adjusted. Furthermore, this active correction method can adjust the sinking attitude of the caisson in real time, thus preventing excessive tilt during sinking. Based on this, this invention provides a caisson sinking attitude adjustment device. Figures 1 to 3 This is a specific embodiment of the attitude adjustment device for sinking a caisson provided by this utility model.

[0040] Please see Figure 1 The attitude adjustment device 100 for sinking a caisson 200 provided by this utility model includes multiple load-bearing supports 1, multiple pressurizing mechanisms 2 for pressing down the load-bearing supports 1, and a soil-collecting device 3. The multiple load-bearing supports 1 are detachably connected to the outer wall of the caisson 200 and are spaced apart along the circumference of the caisson 200. The multiple pressurizing mechanisms 2 are spaced apart along the circumference of the caisson 200 on the outer side of the caisson 200. The number of pressurizing mechanisms 2 is the same as the number of load-bearing supports 1, and they are arranged in a one-to-one correspondence. The soil-collecting device 3 is used to collect soil from inside the caisson 200.

[0041] The adjustment process of the attitude adjustment device 100 provided in this application is as follows: When the tilt of the caisson 200 is detected, the side opposite to the tilt direction of the caisson 200 is determined as the pressure side. Then, for one or more force-bearing supports 1 near the pressure side, the corresponding pressure mechanism 2 is driven to apply downward pressure to the force-bearing supports 1, causing the caisson 200 to tilt towards the pressure side, so that the caisson 200 tends to the correct attitude, thereby avoiding the problem of excessive tilt angle of the caisson 200 during the sinking process. Moreover, while the pressure mechanism 2 is pressing down, the soil-taking device 3 of this application performs soil-taking operations in the area near the pressure side of the caisson 200, which can reduce the frictional resistance on the well wall of the pressure side of the caisson 200, thereby playing a role in assisting to guide the caisson 200 to tilt towards the pressure side. Under the joint action of the pressure mechanism 2 and the soil-taking device 3, the effect of attitude adjustment of the caisson 200 can be greatly improved, ensuring that the caisson 200 sinks smoothly and steadily.

[0042] It should be noted that the soil extraction device 3 provided in this application is not specifically limited, as long as it can extract soil from the internal area of ​​the caisson 200. For example, the soil extraction device 3 uses a grab excavator. The magnitude of the downward pressure provided by the pressurizing mechanism 2 is not specifically limited and can be selected or adjusted in real time according to actual conditions. The number of force-bearing supports 1 and pressurizing mechanisms 2 is also not specifically limited and can be selected according to actual conditions. The spacing of the force-bearing supports 1 arranged along the circumference of the caisson 200 is also not specifically limited and can be selected according to actual conditions. Preferably, multiple force-bearing supports 1 are arranged at equal intervals. Please refer to [link to relevant documentation]. Figure 1 For example, four load-bearing supports 1 are arranged at equal intervals on the outer wall of the caisson 200, and four pressurizing mechanisms 2 corresponding to the load-bearing supports 1 are provided on the outer side of the caisson 200.

[0043] It is worth mentioning that the caisson 200 is typically composed of multiple shaft segments. During the sinking construction of the caisson 200, one shaft segment is sunk at a time. The inventors discovered that the top of each shaft segment usually has a steel reinforcement structure for connecting to another shaft segment, making the top surface of the shaft segment uneven and difficult to serve as a force-bearing platform for the pressurizing mechanism 2 to apply downward pressure. Therefore, a force-bearing support 1 connected to the outer wall of the caisson 200 was designed to provide a stable force-bearing platform. Moreover, since the force-bearing support 1 is detachably connected, it can be replaced with other force-bearing supports of different sizes or shapes according to actual conditions, and it also facilitates disassembly and maintenance. The method by which the force-bearing support 1 is detachably connected to the outside of the caisson 200 is not specifically limited. For example, bolts are pre-embedded in the outer wall of the caisson 200, and the force-bearing support 1 is connected to the outer wall of the caisson 200 by bolts.

[0044] In some embodiments, the pressurizing mechanism 2 includes a fixed bracket 21, a pressurizing base 22, and a hydraulic cylinder 23 for pressing down the force-bearing support 1. The fixed bracket 21 is disposed on the outside of the caisson 200, and the pressurizing base 22 is connected to the fixed bracket 21, and the height of the pressurizing base 22 is adjustable. The hydraulic cylinder 23 is connected to the bottom of the pressurizing base 22. Thus, by driving the piston rod 231 of the hydraulic cylinder 23 to press down the force-bearing support 1, the sinking posture of the caisson 200 can be adjusted. Moreover, the adjustable height of the pressurizing base 22 can increase the stroke range of the piston rod 231, thereby avoiding the situation where the piston rod 231 of the hydraulic cylinder 23 is insufficient in stroke after the caisson 200 has sunk a certain distance, resulting in the inability to apply downward pressure. It should be noted that there is no restriction on the specific location of the fixed bracket 21 on the outside of the caisson 200. It can be selected according to the actual situation, as long as the hydraulic cylinder 23 can press down the force support 1. In addition, in order to ensure the stability of the pressing process, the fixed bracket 21 can also be fixed by the column foot anchor bolts pre-embedded in the ground.

[0045] It should be noted that there are no specific restrictions on the height adjustment method of the pressure base 22. The pressure base 22 can be connected to the drive mechanism, and the drive mechanism can drive the pressure base 22 to move up and down. The drive mechanism can be a hydraulic cylinder, an electric push rod, a screw jack, etc.

[0046] In some embodiments, the fixed bracket 21 is provided with a guide mechanism 214 for guiding the height adjustment of the pressure base 22, so that the pressure base 22 moves only in the vertical direction, preventing the hydraulic cylinder 23 from deviating in the horizontal direction and causing the piston rod 231 to bend and break. The guide mechanism 214 is not specifically limited and can be a guide rail, a slide, etc. For example, please refer to [reference needed]. Figure 3 In this embodiment, the guide mechanism 214 includes two grooves formed on the fixed bracket 21.

[0047] It is understandable that when the caisson 200 tilts, applying pressure to the side opposite to the tilt direction is the most effective way to correct its deviation. In some embodiments of this application, the attitude adjustment device 100 further includes an annular guide rail, which is arranged on the outside of the caisson 200, and the fixed bracket 21 is slidably mounted on the annular guide rail. This allows the pressure mechanism 2 to move on the annular guide rail. When the caisson 200 is found to be tilted, the side opposite to the tilt direction is determined as the pressure side. At this time, a pressure mechanism 2 near the pressure side can be moved directly to the pressure side via the annular guide rail. At the same time, the force support 1 corresponding to the pressure mechanism 2 is disassembled and installed on the outer wall of the pressure side of the caisson 200. Then, the pressure mechanism 2 located on the pressure side presses down on the corresponding force support 1 to adjust the sinking attitude of the caisson 200, thereby improving the accuracy and effectiveness of attitude adjustment.

[0048] To ensure the pressurizing mechanism 2 can be more stably fixed in the designated area after it moves to that area, in some embodiments, the fixed bracket 21 is provided with a locking mechanism to limit its sliding. It should be noted that the specific arrangement of the locking mechanism is not limited; for example, an electromagnetic adsorption fixing method can be used, where an electromagnet is placed at the bottom of the fixed bracket 21, and the annular guide rail is made of ferromagnetic material. Fixing is achieved by generating attraction through energizing the electromagnet. However, considering that the pressurizing mechanism 2 needs to apply downward pressure during use, this application scenario requires high reliability of the locking mechanism. Therefore, in some embodiments of this application, a mechanical slot-type locking mechanism is used. Multiple slots are spaced apart on the annular guide rail, and a telescopic pin is provided at the bottom of the fixed bracket 21. The movement of the fixed bracket 21 is limited by driving the telescopic pin to insert into the slot. This rigid limiting method offers better reliability and safety.

[0049] In some embodiments, a circular pressure plate 232 is connected to the bottom of the piston rod 231 of the hydraulic cylinder 23. The area of ​​the bottom of the circular pressure plate 232 is larger than the area of ​​the bottom of the piston rod 231. The circular pressure plate 232 increases the bearing area of ​​the load-bearing support 1, reduces the contact pressure, and can reduce the deformation of the load-bearing support 1 caused by stress concentration. Moreover, the circular pressure plate 232 can distribute the eccentric load on the piston rod 231, reduce the lateral bending moment borne by the piston rod 231, and reduce the risk of bending of the piston rod 231.

[0050] In order to make the fixed bracket 21 have better structural stability, in some embodiments, the fixed bracket 21 includes a bracket body and a reinforcing rib 213. The bracket body includes a horizontal plate 211 and a vertical plate 212 connected to each other. The two ends of the reinforcing rib 213 are connected to the horizontal plate 211 and the vertical plate 212 respectively. This structure can optimize the amount of material and structural stability to the maximum extent while ensuring the load-bearing strength.

[0051] In some embodiments, the attitude adjustment device 100 includes a plurality of position sensors 4, which are arranged at intervals along the circumferential direction of the caisson 200 on the inner sidewall of the caisson 200. The number of position sensors 4 is the same as the number of force-bearing supports 1 and they are arranged in a one-to-one correspondence. The position sensors 4 can obtain the position information of the caisson 200 at the sensor installation position, thereby providing guidance for construction personnel when driving the pressurization mechanism 2 to adjust the attitude.

[0052] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A posture adjustment device for caisson sinking, characterized in that, include: Multiple load-bearing supports, multiple pressurizing mechanisms for pressing down the load-bearing supports, and a soil-taking device; The plurality of load-bearing supports are detachably connected to the outer wall of the caisson and are spaced apart along the circumference of the caisson. The multiple pressurizing mechanisms are arranged at intervals along the circumference of the caisson on the outside of the caisson; The plurality of pressurizing mechanisms and the plurality of force-bearing supports are the same in number and are arranged in a one-to-one correspondence; The soil-taking device is used to take soil from inside the caisson.

2. The attitude adjustment device for caisson sinking as described in claim 1, characterized in that, The pressurizing mechanism includes a fixed bracket, a pressurizing base, and a hydraulic cylinder for pressing down the force-bearing support; The fixed support is installed on the outside of the caisson; The pressure base is connected to the fixed bracket, and the height of the pressure base is adjustable; The hydraulic cylinder is connected to the bottom of the pressure base.

3. The attitude adjustment device for caisson sinking as described in claim 2, characterized in that, The fixed bracket is equipped with a guide mechanism for guiding the height adjustment of the pressurized base.

4. The attitude adjustment device for sinking a caisson as described in claim 2, wherein the attitude adjustment device further includes an annular guide rail, the annular guide rail being arranged on the outside of the caisson, and the fixed bracket being slidably disposed on the annular guide rail.

5. The attitude adjustment device for sinking a caisson as described in claim 4, wherein the fixed support is provided with a locking mechanism for restricting the sliding of the fixed support.

6. The attitude adjustment device for sinking a caisson as described in claim 5, wherein the annular guide rail is provided with a plurality of slots spaced apart, and the locking mechanism includes a telescopic pin located at the bottom of the fixed bracket.

7. The attitude adjustment device for caisson sinking as described in claim 2, characterized in that, The piston rod of the hydraulic cylinder is connected to a circular pressure plate at its bottom, and the area of ​​the bottom of the circular pressure plate is larger than the area of ​​the bottom of the piston rod.

8. The attitude adjustment device for caisson sinking as described in claim 2, characterized in that, The fixed bracket includes a bracket body and reinforcing ribs. The bracket body includes a horizontal plate and a vertical plate connected to each other. The two ends of the reinforcing ribs are respectively connected to the horizontal plate and the vertical plate.

9. The attitude adjustment device for caisson sinking as described in claim 1, characterized in that, It also includes multiple position sensors, which are arranged at intervals along the circumference of the caisson on the inner wall of the caisson. The number of the multiple position sensors is the same as the number of the multiple force supports and they are arranged in a one-to-one correspondence.

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