Inner support device and method for open caisson construction

Abstract

The application provides an inner support device and method for open caisson construction, wherein the device part comprises a centering base, a plurality of translational elements, a synchronous driving member and a synchronous winding member; the plurality of translational elements are in sliding connection with the centering base to move towards or away from the central axis of the centering base; each translational element is hinged with a swing arm, and the swing end of the swing arm is provided with a support plate; the synchronous driving member and the synchronous winding member are arranged on the centering base and are respectively used for driving the translational element to move towards or away from the centering base and driving the swing arm to swing to a horizontal state or a vertical state; the inner support device and method for open caisson construction can reduce the width of the device to ensure that the device is placed inside the open caisson; and by abutting the inner wall of the open caisson through the support plate, the centering base and the center of the ground surface inside the open caisson can be aligned, so that the open caisson is supported from the inside, which can improve the structural stability of the open caisson relative to the ground and ensure the stability of the open caisson during sinking.

Description

Technical Field

[0001] This application belongs to the field of caisson construction technology, specifically relating to an internal support device and method for caisson construction. Background Technology

[0002] Caisson construction is a common construction method in underground engineering, widely used in the foundation construction of structures such as bridge piers, pump rooms, shafts, and underground corridors. During construction, the cutting edge and well wall are first made, and the well is lowered to the design elevation by its own weight or with the help of auxiliary measures. Then the bottom is sealed to form the underground structure.

[0003] In existing technologies, caisson construction typically relies on the rigidity of the caisson wall itself to resist the pressure of the surrounding rock and soil. During sinking, it generally relies on the friction between the outer wall and the soil and the guiding effect of the cutting edge.

[0004] The inventors discovered that traditional caisson structures face the following problems in actual construction: First, in soft soil or high-water-level strata, the caisson wall will bear a large amount of external soil pressure and water pressure, which is difficult to effectively resist by the rigidity of the caisson wall itself, and the caisson wall is prone to instability; Second, during the sinking process, due to the lack of corresponding guiding constraints, the caisson is prone to tilting and twisting, affecting the sinking posture and making it difficult to correct the deviation, resulting in difficulty in ensuring construction accuracy. Summary of the Invention

[0005] This application provides an internal support device and method for caisson construction, which aims to support the inner side of the caisson wall to improve its structural stability relative to the ground and ensure its stability during the sinking process.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: An internal support device for caisson construction is provided, comprising: The center seat is used to insert into the center of the ground surface inside the caisson; Multiple translational members are arranged around the centering seat and are slidably connected to the centering seat to be adapted to move toward or away from the central axis of the centering seat; each translational member is hinged with a swing arm, and the swing end of the swing arm has a support plate; when the swing arm swings to a horizontal state, by driving the translational member to move away from the central axis of the centering seat, the support plate can be made to abut against the inner wall of the caisson; A synchronous drive component, disposed on the centering seat, is drively connected to the plurality of translational members, for driving each translational member to move toward or away from the central axis of the centering seat; and A synchronous winding component is disposed on the centering seat and is connected to the multiple swing arms for driving each swing arm to swing to the horizontal or vertical state.

[0007] In one possible implementation, the synchronization drive component includes: A drive gear is coaxially disposed at the bottom of the centering seat and rotatably connected to the centering seat; the drive gear is driven by a first rotary motor; and Multiple transmission screws are arranged one-to-one on multiple translational members, with one end fixedly connected to the translational member and the other end extending toward the central axis of the centering seat into the interior of the centering seat; Each of the transmission screws is threaded with a transmission nut, which is located inside the centering seat and is rotatably connected to the centering seat. Furthermore, the transmission nut is connected to the drive gear via a transmission gear set, so that the transmission nut rotates synchronously when the drive gear rotates.

[0008] In one possible implementation, the transmission gear set includes: The driven helical gear is rotatably disposed inside the centering seat and coaxially connected to the transmission nut; and A drive shaft is rotatably disposed inside the centering seat, and its axial direction is parallel to the axial direction of the drive gear; the drive shaft has a driven gear that meshes with the drive gear, and a driving helical gear that meshes with the driven helical gear.

[0009] In one possible implementation, the power output end face of the first rotary motor has a convex shaft, and the center of the drive gear has a through hole suitable for the convex shaft to pass through. The drive gear also has a drill bit on its lower side, which is rotatably connected to the bottom surface of the centering seat, and its top end has a slot suitable for the insertion of the cam shaft.

[0010] In one possible implementation, the synchronous winding component includes: Multiple linkage shafts correspond one-to-one with the multiple swing arms. Each linkage shaft is rotatably mounted on the upper side of the centering seat and rotatably connected to the centering seat. The multiple linkage shafts are spaced apart around the central axis of the centering seat, and adjacent linkage shafts are connected by a helical gear set. The second rotating motor is fixedly mounted on the centering seat and is connected to one of the linkage shafts via a spur gear set; Each of the linkage shafts is connected to a take-up belt, which is wound around the linkage shaft, and the free end of the take-up belt is connected to the swing arm.

[0011] In one possible implementation, the outer wall of the centering seat has multiple sets of guide arms corresponding one-to-one with multiple translational members, and each translational member is slidably connected to the corresponding guide arm; the internal support device for caisson construction further includes: Multiple sets of positioning stakes are used to fix the stakes on the ground surface, and are spaced apart around the center of the ground surface. Each set of positioning stakes has a positioning groove at its top. Multiple alignment shafts are arranged one-to-one on multiple sets of guide arms, and all are used to insert into the positioning groove to restrict the horizontal movement of the centering seat relative to the positioning post.

[0012] In one possible implementation, each set of positioning stakes includes two positioning stakes spaced apart in a horizontal direction, with an elastic band between the two positioning stakes; When the swing arm swings to the horizontal state, the swing arm abuts against the positioning stake.

[0013] In one possible implementation, the centering seat has an upwardly extending cantilever at its top end, and the cantilever has a plurality of reserved holes spaced apart in the vertical direction with different inner diameters. Each of the reserved holes is used to connect with the lifting device of a crane to drive the centering seat to move.

[0014] In one possible implementation, the centering seat includes: The base, with a hollow interior and an upward-opening structure, is designed to be inserted into the ground surface and is located at the center of the ground surface; and A top cover is disposed on the upper side of the base and is detachably connected to the base; The translational member and the synchronous drive member are both disposed on the base, and the synchronous winding member is disposed on the top cover.

[0015] In this embodiment, by placing the centering seat at the center of the ground surface inside the caisson, a reference origin for radial adjustment is provided for the device. Simultaneously, by utilizing multiple translational members arranged around the centering seat and capable of synchronously moving towards or away from the central axis, and each translational member having a hinged swing arm with a support plate at its swinging end, a synchronous winding component drives all swing arms to a horizontal position. Then, a synchronous drive component drives the translational members to move away from the central axis, causing each support plate to simultaneously abut against the inner wall of the caisson, forming a uniformly distributed internal support system along the circumference. This structure subjects the inner wall of the caisson to symmetrical radial support forces from the center, effectively improving the wall's stiffness against external earth and water pressure.

[0016] The core of the aforementioned device lies in establishing a geometric center using a centering seat, and through the synchronous radial movement of the translational components and the horizontal deployment of the swing arms, forming a controllable annular support array of the support plates inside the caisson. This technique achieves two objectives: firstly, the supporting force is applied outward from the inside of the caisson wall, actively balancing external loads and preventing inward instability of the caisson wall in soft soil or high-water-level strata; secondly, since all support plates extend synchronously around the centering seat, the contact points between each support plate and the caisson wall are located on the same theoretical circle, thus providing continuous radial restraint and guidance for the caisson during its sinking process, effectively suppressing caisson tilt and torsion.

[0017] Compared with the prior art, the internal support device for caisson construction provided in this embodiment can establish an adjustable circumferential rigid support inside the caisson through synchronously driven radial movement and swing arm extension and retraction. This systematically solves the core problems of traditional caissons being prone to instability in soft soil or high water level strata due to insufficient caisson wall rigidity, and the lack of guiding constraints during sinking leading to deflection and torsion. It significantly improves the structural safety and sinking attitude control accuracy of caisson construction.

[0018] The technical solution adopted in this application also provides an internal support method for caisson construction, based on the internal support device for caisson construction proposed in any of the foregoing claims, including the following steps: S1. Clean the impurities on the surface inside the caisson and mark the center of the surface; S2. The synchronous winding component drives the swing arm to swing to a vertical position, and the synchronous driving component drives each of the translational components to move toward the central axis of the translational component; S3. The centering seat is moved to the inside of the caisson by a crane and is located on the upper side of the ground surface inside the caisson; S4. The synchronous winding component drives the swing arm to swing to a horizontal state, and the synchronous driving component drives each translation component to move away from the central axis of the translation component, so that the support plate abuts against the inner wall of the caisson; S5. The centering seat is lowered to the surface of the ground inside the caisson using a crane.

[0019] The beneficial effects of the internal support method for caisson construction provided in this embodiment are the same as those of the aforementioned internal support device for caisson construction, and will not be repeated here. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is one of the three-dimensional structural schematic diagrams of the internal support device provided in the embodiments of this application; Figure 2 for Figure 1 A magnified view of a portion of the middle circle A; Figure 3 A second three-dimensional structural schematic diagram of the internal support device provided in the embodiments of this application; Figure 4 The third three-dimensional structural schematic diagram of the internal support device provided in the embodiments of this application (the positioning piles in the figure are hidden for easy display). Figure 5 This is a three-dimensional structural diagram of the translational component, swing arm, and support plate used in the embodiments of this application in a combined state; Figure 6 A cross-sectional view of the internal support device provided in the embodiments of this application (the positioning piles are hidden in the figure for easy display). Figure 7 This is an exploded view of the centering seat used in the embodiments of this application; Figure 8 This is a partially enlarged schematic diagram of the top cover used in the embodiments of this application from a cross-sectional perspective; Figure 9 This is a three-dimensional structural diagram of the synchronous winding component used in the embodiments of this application; Figure 10 This is a three-dimensional structural diagram of the base, guide arm, and alignment shaft used in the embodiments of this application in a combined state; Figure 11 This is a three-dimensional structural diagram of the positioning pile used in the embodiments of this application; Figure 12 This is a three-dimensional structural diagram of the synchronous drive component and transmission gear set used in the embodiments of this application in a combined state; Figure 13 This is an exploded view of the transmission screw and transmission gear set used in the embodiments of this application; Figure 14 This is a three-dimensional structural diagram of the first rotating motor, drive gear, and drill bit used in the embodiments of this application in a combined state; Figure 15 This is a cross-sectional view of the first rotating motor, drive gear, and drill bit used in the embodiments of this application from an explosive perspective. Figure 16 A schematic flowchart illustrating the internal support method provided in this application embodiment; Explanation of reference numerals in the attached drawings: 1. Centering seat; 11. Base; 111. Guide arm; 112. Alignment shaft; 12. Top cover; 121. Cantilever; 1211. Reserved hole; 2. Translation component; 21. Swing arm; 22. Support plate; 3. Synchronous drive component; 31. Drive gear; 311. Through hole; 32. Transmission screw; 321. Transmission nut; 4. Synchronous winding component; 41. Linkage shaft; 411. Helical gear set; 412. Winding belt; 42. Second rotating motor; 421. Spur gear set; 5. Transmission gear set; 51. Driven helical gear; 52. Transmission shaft; 521. Driven gear; 522. Driving helical gear; 6. Drill bit; 61. Slot; 7. Positioning post; 71. Positioning groove; 72. Elastic band; 10. First rotating motor; 101. Protruding shaft. Detailed Implementation

[0022] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0024] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] Please refer to the following: Figures 1 to 15 The internal support device for caisson construction provided in this application will now be described. The internal support device proposed in this application includes a centering base 1, multiple translational components 2, a synchronous drive component 3, and a synchronous winding component 4.

[0027] The center seat 1 is used to be placed at the center of the ground inside the caisson and to be in contact with the ground surface, so as to serve as the support and positioning foundation for this device.

[0028] Multiple translational members 2 are arranged around the centering seat 1 and are all slidably connected to the centering seat 1. The direction of their sliding connection is parallel to the direction of the translational members 2 toward the central axis of the centering seat 1, so that each translational member 2 has the freedom to move toward or away from the central axis of the centering seat 1.

[0029] Each translational member 2 is hinged with a swing arm 21, and the swing end of the swing arm 21 is fixedly connected to a support plate 22. The hinge axis of the swing arm 21 is perpendicular to its length direction and parallel to the horizontal plane. The outer surface of the support plate 22 is an arc surface with the same curvature as the inner wall of the caisson, so as to achieve surface contact and increase the contact area between the support plate 22 and the inner wall of the caisson.

[0030] When the swing arm 21 swings to the vertical position, the support plate 22 is above the centering seat 1. In this state, the device occupies a smaller area on the horizontal plane, which makes it easier to insert into the caisson, avoids scraping and collision with the edge of the caisson, and reduces the centering requirements of the centering seat 1 outside the caisson.

[0031] When the swing arm 21 swings to a horizontal position, the translation component 2 is driven to move away from the central axis of the centering seat 1, so that the support plate 22 can abut against the inner wall of the caisson. It should be noted that the technical means of "swinging first and then translating" here is to avoid the outer surface of the support plate 22 from rubbing against the inner wall of the caisson when the swing arm 21 swings. In actual use, by adjusting the moving distance of the translation component 2, complete contact between the support plate 22 and the inner wall of the caisson can be ensured.

[0032] The synchronous drive component 3 is mounted on the centering seat 1 and is connected to multiple translation components 2 for driving each translation component 2 to move toward or away from the central axis of the centering seat 1.

[0033] The synchronous winding component 4 is mounted on the centering seat 1 and is connected to multiple swing arms 21 for driving each swing arm 21 to swing to a horizontal or vertical state.

[0034] In this embodiment, the centering seat 1 is placed at the center of the ground surface inside the caisson, providing a reference origin for radial adjustment of the device. Simultaneously, by utilizing multiple translational members 2 arranged around the centering seat 1 and capable of synchronously moving towards or away from the central axis, and each translational member 2 having a hinged swing arm 21 with a support plate 22 at its swinging end, the synchronous winding member 4 drives all the swing arms 21 to swing synchronously to a horizontal state. Then, the synchronous driving member 3 drives the translational members 2 to move away from the central axis, causing each support plate 22 to simultaneously abut against the inner wall of the caisson, forming an internal support system evenly distributed along the circumference. This structure subjects the inner wall of the caisson to symmetrical radial support forces from the center, effectively improving the stiffness of the caisson wall against external earth and water pressure.

[0035] The core of the aforementioned device lies in establishing a geometric center using the centering seat 1, and through the synchronous radial movement of the translational member 2 and the horizontal deployment of the swing arm 21, forming a controllable annular support array of support plates 22 inside the caisson. This technique achieves two objectives: firstly, the supporting force is applied outward from the inside of the caisson wall, actively balancing external loads and preventing inward instability of the caisson wall in soft soil or high-water-level strata; secondly, since all support plates 22 extend synchronously around the centering seat 1, the contact points between each support plate 22 and the caisson wall are located on the same theoretical circle, thus providing continuous radial restraint and guidance for the caisson during its sinking process, effectively suppressing the caisson's tilt and torsion.

[0036] Compared with the prior art, the internal support device for caisson construction provided in this embodiment can establish an adjustable circumferential rigid support inside the caisson through synchronously driven radial movement and the extension and retraction of the swing arm 21. This systematically solves the core problems of traditional caissons being prone to instability in soft soil or high water level strata due to insufficient caisson wall rigidity, and the lack of guiding constraints during sinking leading to deflection and torsion. It significantly improves the structural safety and sinking attitude control accuracy of caisson construction.

[0037] In some embodiments, such as Figure 6 , Figure 12 and Figure 13 As shown, the synchronous drive component 3 includes a drive gear 31 and multiple transmission screws 32.

[0038] The drive gear 31 is coaxially mounted at the bottom of the centering seat 1 and rotatably connected to the centering seat 1. Furthermore, the drive gear 31 is connected to a first rotating motor 10, which is fixedly mounted inside the centering seat 1. Its power output shaft extends below the centering seat 1 to coaxially connect with the drive gear 31, which is also mounted on the outside of the centering seat 1. A protective shell is detachably connected to the lower side of the centering seat 1, covering the drive gear 31 to prevent the ground surface inside the caisson from contacting the drive gear 31 and causing it to malfunction.

[0039] It should be noted that in this embodiment, the centering seat 1 also has multiple downward-extending legs (not shown in the figure) on its bottom surface. These legs can ensure that the centering seat 1 can maintain a preset distance from the ground surface inside the caisson after it is lowered, thus avoiding damage to the drive gear 31.

[0040] Multiple transmission screws 32 are arranged one-to-one on multiple translational members 2. Specifically, the transmission screws 32 penetrate the centering seat 1 radially, with one end outside the centering seat 1 and the other end inside the centering seat 1. Based on this, the outer end of the transmission screws 32 is fixedly connected to the translational members 2.

[0041] To ensure that there is no positional interference between the multiple transmission screws 32, in this embodiment, there are four transmission screws 32, divided into two groups. Each group of transmission screws 32 includes two transmission screws 32 arranged in parallel, and the two groups of transmission screws 32 are spaced apart in the vertical direction.

[0042] At the same time, in order to ensure the stability of the movement of the transmission screw 32, please combine... Figure 10 and Figure 13 The interior of the center seat 1 has multiple sets of guide rods corresponding to multiple transmission screws 32. Each set of guide rods includes two guide rods arranged side by side in the horizontal direction. Furthermore, the inner end of the transmission screw 32 has an integral disk extending outward in its radial direction. This integral disk has two through holes that pass through in the radial direction, and the two guide rods are respectively inserted into the two through holes to limit the sliding direction of the transmission screw 32.

[0043] Each drive screw 32 is threadedly connected to a drive nut 321, which is located inside the centering seat 1 and rotatably connected to it. Specifically, the drive screw 32 only has the degree of freedom to rotate relative to the centering seat 1, but not the degree of freedom to move relative to it, so that when the drive nut 321 rotates, the drive screw 32 translates relative to the drive nut 321, and the direction of translation is consistent with the axial direction of the drive nut 321.

[0044] The transmission nut 321 is connected to the drive gear 31 via the transmission gear set 5, so that when the drive gear 31 rotates, multiple transmission nuts 321 rotate synchronously. In other words, this synchronous drive component 3, through the cooperation of the drive gear 31 and the transmission gear set 5, achieves the synchronous rotation of multiple transmission nuts 321, thereby driving each transmission screw 32 and the translational component 2 to move synchronously radially. Its beneficial effects are: The first rotating motor 10 drives the drive gear 31 to rotate, and the driving force is transmitted to all the transmission nuts 321 simultaneously through the transmission gear set 5. Since the pitch of each transmission nut 321 is the same, the movement distance of each transmission screw 32 is completely consistent, ensuring that all support plates 22 synchronously abut against the well wall and the force is uniform. At the same time, the screw and nut transmission has a self-locking characteristic, and the support force can be maintained without continuous power supply during the support process.

[0045] In some embodiments, such as Figure 12 and Figure 13 As shown, the transmission gear set 5 includes a driven helical gear 51 and a transmission shaft 52.

[0046] Driven helical gear 51 is rotatably mounted inside centering seat 1 and is coaxially connected to transmission nut 321.

[0047] The drive shaft 52 is rotatably mounted inside the centering seat 1, and its axial direction is parallel to the axial direction of the drive gear 31.

[0048] The transmission shaft 52 has a driven gear 521 that meshes with the drive gear 31, and a driving helical gear 522 that meshes with the driven helical gear 51.

[0049] The transmission gear set 5 achieves power transmission between the drive gear 31 and the transmission nut 321 through helical gear meshing. Its advantages are: helical gear transmission has the characteristics of smooth meshing and high load-bearing capacity, which is suitable for heavy-load conditions in caisson construction; at the same time, through the layout of the transmission shaft 52, the rotational motion of the drive gear 31 can be converted into the synchronous rotation of multiple transmission nuts 321, which is compact and has high transmission efficiency.

[0050] In some embodiments, such as Figure 14 and Figure 15 As shown, the power output end face of the first rotary motor 10 has a convex shaft 101. In this embodiment, there are two convex shafts 101, which are symmetrically arranged with respect to the central axis of the power output shaft. Correspondingly, the center of the drive gear 31 has a through hole 311 suitable for the convex shaft 101 to pass through, so as to realize the power transmission of the first rotary motor 10 to drive the gear 31 axially.

[0051] In addition, the lower side of the drive gear 31 also has a drill bit 6, which is rotatably connected to the bottom surface of the centering seat 1 (specifically, connected to the bottom surface of the aforementioned protective shell), and its top end has a slot 61 suitable for the insertion of the convex shaft 101.

[0052] The drill bit 6, in conjunction with the first rotating motor 10, provides auxiliary fixation for the centering seat 1. Its beneficial effect is that after the centering seat 1 is placed at the center of the ground surface inside the caisson, the first rotating motor 10 drives the drill bit 6 to rotate via the cam shaft 101, causing the drill bit 6 to drill below the ground surface and anchor the centering seat 1 in the center position. This prevents horizontal slippage or rotation of the centering seat 1 during subsequent deployment and support of the swing arm 21, ensuring the reference accuracy of the radial drive. During the aforementioned anchoring process, the translational component 2 can move outward synchronously, thereby ensuring the accurate centering effect of the centering seat 1.

[0053] In some embodiments, such as Figure 2 and Figure 9 As shown, the synchronous winding component 4 includes multiple linkage shafts 41 and a second rotating motor 42.

[0054] Multiple linkage shafts 41 correspond one-to-one with multiple swing arms 21. Each linkage shaft 41 is rotatably mounted on the upper side of the centering seat 1 and rotatably connected to the centering seat 1. In this embodiment, there are four linkage shafts 41, which are distributed at intervals around the central axis of the centering seat 1, and the axial directions of two adjacent linkage shafts 41 are perpendicular to each other. Furthermore, adjacent linkage shafts 41 are connected by a helical gear set 411. Specifically, the shaft ends of two linkage shafts 41 are coaxially connected to a first helical gear and a second helical gear, and the first helical gear and the second helical gear mesh with each other, so that when one linkage shaft 41 rotates, the other linkage shaft 41 rotates synchronously and in the opposite direction.

[0055] The second rotary motor 42 is fixedly mounted on the centering seat 1 and is connected to one of the linkage shafts 41 via a spur gear set 421. Specifically, the power output end of the second rotary motor 42 has a first spur gear coaxially connected to it, and a second spur gear meshing with the first spur gear is coaxially connected to the linkage shaft 41.

[0056] Each linkage shaft 41 is connected to a take-up belt 412, which is wound around the linkage shaft 41, and the free end of the take-up belt 412 is connected to the swing arm 21.

[0057] It should be noted that although adjacent linkage shafts 41 rotate in opposite directions, the winding direction of the take-up belt 412 can be adjusted in advance to ensure that multiple linkage shafts 41 pull the take-up belt 412 back synchronously or release the take-up belt 412 outward.

[0058] In this embodiment, the synchronous winding and unwinding of all swing arms 21 is achieved through the cooperation of the linkage shaft 41 and the helical gear set 411. Furthermore, the second rotary motor 42 drives one of the linkage shafts 41 to rotate, and transmits power to all linkage shafts 41 through the helical gear set 411, causing each winding tape 412 to wind or unwind synchronously, thereby driving each swing arm 21 to swing synchronously to a horizontal or vertical state, avoiding uneven force on the support plate 22 or motion interference caused by inconsistent movements of the swing arms 21.

[0059] In some embodiments, such as Figure 3 , Figure 4 and Figure 11 As shown, the outer wall of the center seat 1 has multiple sets of guide arms 111 that correspond one-to-one with multiple translational members 2, and each translational member 2 is slidably connected to the corresponding guide arm 111.

[0060] Based on the foregoing, the internal support device for caisson construction also includes multiple sets of positioning piles 7 and multiple sets of alignment shafts 112.

[0061] Multiple sets of positioning stakes 7 are used to fix them on the ground surface and are spaced apart around the center of the ground surface. Each set of positioning stakes 7 has a positioning groove 71 at the top.

[0062] Multiple sets of alignment shafts 112 are arranged one-to-one on multiple sets of guide arms 111, and are all used to insert into the positioning groove 71 to limit the horizontal movement of the centering seat 1 relative to the positioning post 7.

[0063] By adopting the above technical solution, before the centering seat 1 is hoisted to the center of the ground, the positioning pile 7 is driven into the ground at the predetermined position; when the centering seat 1 is lowered, the alignment shaft 112 on the guide arm 111 falls into the positioning groove 71, thereby accurately locking the centering seat 1 in the center position, while preventing it from rotating when the swing arm 21 is subsequently deployed, ensuring the radial alignment accuracy of each support plate 22.

[0064] In some embodiments, such as Figure 11 As shown, each set of positioning piles 7 includes two positioning piles 7 spaced apart in the horizontal direction, and there is an elastic band 72 between the two positioning piles 7.

[0065] When the swing arm 21 swings to a horizontal position, the swing arm 21 abuts against the positioning pile 7.

[0066] The elastic band 72 is designed to buffer the impact when the swing arm 21 swings. Its beneficial effect is that when the swing arm 21 swings down from the vertical position to the horizontal position, the swing arm 21 first contacts the elastic band 72. The elastic deformation of the elastic band 72 absorbs the impact energy, avoiding rigid collision between the swing arm 21 and the positioning post 7, which would cause damage or positioning displacement. At the same time, the tension of the elastic band 72 can help the swing arm 21 maintain stability in the horizontal position.

[0067] In this embodiment, in order to ensure that the swing arm 21 and the elastic band 72 can make contact and to achieve adjustable contact depth, the outer side of the swing arm 21 has a height-adjustable pad so that when the swing arm 21 swings to a horizontal state, the pad and the elastic band 72 make contact and press the elastic band 72.

[0068] The height of the pad is adjusted as follows: the pad consists of multiple pads, which are connected by Velcro. During adjustment, the overall height can be adjusted by loading new pads onto the pad group or removing the original pads from the pad group.

[0069] In some embodiments, such as Figure 4 and Figure 6 As shown, the centering seat 1 has an upwardly extending cantilever 121 at its top end. This cantilever 121 has multiple reserved holes 1211 with different inner diameters spaced apart in the vertical direction. Each reserved hole 1211 is used to connect with the hook of the crane to drive the centering seat 1 to move.

[0070] The design of the cantilever 121 and multiple pre-drilled holes 1211 facilitates the hoisting and attitude adjustment of the centering seat 1. Its advantages are: operators can select a suitable inner diameter pre-drilled hole 1211 to connect with the lifting device according to the specifications of the crane hook or the on-site hoisting requirements, improving the versatility of the device; simultaneously, hoisting via the cantilever 121 ensures that the centering seat 1 remains horizontal during hoisting, facilitating the alignment of the alignment shaft 112 with the positioning pile 7.

[0071] In some embodiments, such as Figure 6 and Figure 7 As shown, the center seat 1 includes a base 11 and a top cover 12.

[0072] The base 11 has a hollow interior and an open top structure, which is used to be placed on the ground and is located at the center of the ground.

[0073] The top cover 12 is located on the upper side of the base 11 and is detachably connected to the base 11.

[0074] The translation component 2 and the synchronous drive component 3 are both mounted on the base 11, and the synchronous winding component 4 is mounted on the top cover 12.

[0075] This split structure facilitates the installation and maintenance of internal components. Its advantages are: during device assembly or maintenance, the top cover 12 can be separated from the base 11, thereby exposing the internal space of the base 11, which facilitates the installation, debugging and maintenance of components such as the synchronous drive component 3 and the transmission gear set 5; at the same time, the synchronous winding component 4 is independently set on the top cover 12, avoiding motion interference with the bottom drive mechanism.

[0076] Based on the same inventive concept, this application also provides an internal support method for caisson construction, based on any of the aforementioned internal support devices for caisson construction, such as... Figure 16 As shown, the method includes the following steps: S1. Clean the impurities on the surface inside the caisson and mark the center of the surface. At the same time, it is also necessary to set up multiple sets of positioning stakes 7 around the center, each set of positioning stakes 7 including two positioning stakes 7 arranged side by side in the horizontal direction.

[0077] S2. The swing arm 21 is swung to a vertical position by the synchronous winding component 4, and each translation component 2 is moved toward the central axis of the translation component 2 by the synchronous drive component 3. This process is usually performed when the device leaves the factory, that is, this state is the initial state of the device.

[0078] S3. The centering seat 1 is moved to the inside of the caisson by a crane, and is located on the upper side of the ground surface inside the caisson. The cooperation between the crane and the centering seat 1 is achieved by the cantilever 121, that is, the crane hook can be selected from one of the reserved holes 1211 with different outer diameters and hooked into it to achieve a quick connection.

[0079] S4. The swing arm 21 is driven to swing to a horizontal state by the synchronous winding component 4, and each translation component 2 is driven to move away from the central axis of the translation component 2 by the synchronous drive component 3, so that the support plate 22 abuts against the inner wall of the caisson.

[0080] S5. Using a crane, lower the centering seat 1 to the surface of the ground inside the caisson, so that the bottom of the centering seat 1 (specifically the bottom of the protective shell or the bottom of the legs) is in contact with the surface of the ground inside the caisson.

[0081] It should be noted that in this embodiment, S5 can be executed after the swing arm 21 is swung to a horizontal state by the synchronous winding member 4. That is, the centering seat 1 is first lowered to the surface of the ground inside the caisson, and then each translation member 2 is moved away from the central axis of the translation member 2 by the synchronous drive member 3. The purpose of this setting is that when the centering seat 1 has the aforementioned drill bit 6 on its lower side, the drill bit 6 drills into the ground and the translation member 2 moves outward at the same time.

[0082] This method involves first retracting the swing arm 21 and the translational component 2 to create a compact structure for easy hoisting into the caisson; after insertion, the swing arm 21 is extended and the support plate 22 is pushed out radially to establish internal support; finally, the centering seat 1 is lowered to the ground surface to ensure stable load-bearing capacity of the support system. This method is simple in procedure, safe in operation, and fully utilizes the synchronous adjustment advantage of the internal support device, effectively ensuring the structural stability and attitude control of the caisson during subsequent sinking or construction.

[0083] The above content is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An internal support device for caisson construction, characterized in that, include: The center seat is used to insert into the center of the ground surface inside the caisson; Multiple translational members are arranged around the centering seat and are slidably connected to the centering seat to be adapted to move toward or away from the central axis of the centering seat; each translational member is hinged with a swing arm, and the swing end of the swing arm has a support plate; when the swing arm swings to a horizontal state, by driving the translational member to move away from the central axis of the centering seat, the support plate can be made to abut against the inner wall of the caisson; A synchronous drive component is disposed on the centering seat and is connected to the plurality of translational components for driving each translational component to move toward or away from the central axis of the centering seat. as well as A synchronous winding component is disposed on the centering seat and is connected to the multiple swing arms for driving each swing arm to swing to the horizontal or vertical state.

2. The internal support device for caisson construction as described in claim 1, characterized in that, The synchronous drive component includes: A drive gear is coaxially disposed at the bottom of the centering seat and rotatably connected to the centering seat; the drive gear is driven by a first rotary motor; and Multiple transmission screws are arranged one-to-one on multiple translational members, with one end fixedly connected to the translational member and the other end extending toward the central axis of the centering seat into the interior of the centering seat; Each of the transmission screws is threaded with a transmission nut, which is located inside the centering seat and is rotatably connected to the centering seat. Furthermore, the transmission nut is connected to the drive gear via a transmission gear set, so that the transmission nut rotates synchronously when the drive gear rotates.

3. The internal support device for caisson construction as described in claim 2, characterized in that, The transmission gear set includes: The driven helical gear is rotatably disposed inside the centering seat and coaxially connected to the transmission nut; and A drive shaft is rotatably disposed inside the centering seat, and its axial direction is parallel to the axial direction of the drive gear; the drive shaft has a driven gear that meshes with the drive gear, and a driving helical gear that meshes with the driven helical gear.

4. The internal support device for caisson construction as described in claim 2, characterized in that, The first rotating motor has a convex shaft on its power output end face, and the drive gear has a through hole at its center suitable for the convex shaft to pass through. The drive gear also has a drill bit on its lower side, which is rotatably connected to the bottom surface of the centering seat, and its top end has a slot suitable for the insertion of the cam shaft.

5. The internal support device for caisson construction as described in claim 1, characterized in that, The synchronous winding component includes: Multiple linkage shafts correspond one-to-one with the multiple swing arms. Each linkage shaft is rotatably mounted on the upper side of the centering seat and rotatably connected to the centering seat. The multiple linkage shafts are spaced apart around the central axis of the centering seat, and adjacent linkage shafts are connected by a helical gear set. The second rotating motor is fixedly mounted on the centering seat and is connected to one of the linkage shafts via a spur gear set; Each of the linkage shafts is connected to a take-up belt, which is wound around the linkage shaft, and the free end of the take-up belt is connected to the swing arm.

6. The internal support device for caisson construction as described in claim 1, characterized in that, The outer wall of the centering seat has multiple sets of guide arms corresponding one-to-one with multiple translational members, and each translational member is slidably connected to the corresponding guide arm; the internal support device for caisson construction also includes: Multiple sets of positioning stakes are used to fix the stakes on the ground surface, and are spaced apart around the center of the ground surface. Each set of positioning stakes has a positioning groove at its top. Multiple alignment shafts are arranged one-to-one on multiple sets of guide arms, and all are used to insert into the positioning groove to restrict the horizontal movement of the centering seat relative to the positioning post.

7. The internal support device for caisson construction as described in claim 6, characterized in that, Each set of positioning stakes includes two positioning stakes spaced apart in the horizontal direction, with an elastic band between the two positioning stakes; When the swing arm swings to the horizontal state, the swing arm abuts against the positioning stake.

8. The internal support device for caisson construction as described in claim 1, characterized in that, The centering seat has an upwardly extending cantilever at its top end. The cantilever has multiple reserved holes of different inner diameters spaced apart in the vertical direction. Each of the reserved holes is used to connect with the lifting device of a crane to drive the centering seat to move.

9. The internal support device for caisson construction as described in claim 1, characterized in that, The centering seat includes: The base, with a hollow interior and an upward-opening structure, is designed to be inserted into the ground surface and is located at the center of the ground surface; and A top cover is disposed on the upper side of the base and is detachably connected to the base; The translational member and the synchronous drive member are both disposed on the base, and the synchronous winding member is disposed on the top cover.

10. A method for internal support in caisson construction, based on the internal support device for caisson construction according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Clean the impurities on the surface inside the caisson and mark the center of the surface; S2. The synchronous winding component drives the swing arm to swing to a vertical position, and the synchronous driving component drives each of the translational components to move toward the central axis of the translational component; S3. The centering seat is moved to the inside of the caisson by a crane and is located on the upper side of the ground surface inside the caisson; S4. The synchronous winding component drives the swing arm to swing to a horizontal state, and the synchronous driving component drives each translation component to move away from the central axis of the translation component, so that the support plate abuts against the inner wall of the caisson; S5. The centering seat is lowered to the surface of the ground inside the caisson using a crane.

Images