A support device for cast-in-place pile steel pipe columns

Abstract

The present invention provides a bored pile steel pipe column support device, which belongs to the field of building construction. With the rapid development of urban construction and the vigorous development and utilization of underground space, there are more and more deep foundation pit buildings and overweight components. When the underground structure is constructed by the reverse method, before the initial setting of the concrete, the steel pipe column must be inserted into the bored pile and temporarily suspended by a crane, and then wait for further solidification. This process takes several days and will occupy the crane all the time. The present invention provides a bored pile steel pipe column support device, including multiple groups of support structures, each support structure includes a base, a support arm, a load-bearing assembly and a power assembly, which can lift and support the steel pipe column, release the crane occupancy, and optimize the cost and construction period; at the same time, compared with the crane, the support device also has the function of vertical adjustment to improve the installation accuracy of the steel pipe column.

Description

Technical Field

[0001] The present invention belongs to the field of building construction, and particularly relates to a support device for steel pipe columns of cast-in-place piles. Background Art

[0002] With the rapid development of urban construction and the extensive development and utilization of underground space, there are more and more deep foundation pit buildings and overweight components. When the underground structure is constructed by the top-down method, before the concrete initial sets, the steel pipe column needs to be inserted into the cast-in-place pile and temporarily suspended by a crane, and then wait for further solidification. This process takes several days.

[0003] There are mainly two adverse effects in the above process. One is that the time from the completion of concrete pouring of the cast-in-place pile to the completion of steel pipe column insertion is relatively long. Considering the influence of concrete hydration heat and other unexpected factors, super-retarding underwater concrete needs to be used, with an initial setting time of not less than 48 hours and a final setting time of not more than 72 hours. As a result, during this process, the crane needs to be occupied for several days. Moreover, usually multiple cast-in-place piles are constructed synchronously in the same project, and it is impossible to find so many cranes on site. Even if there are, the cost is difficult to bear. The other is that the axis accuracy of the steel pipe column is reduced. In the prior art, during the process of waiting for the concrete to solidify, the lower part of the steel pipe column is inserted into the concrete, and the upper part is temporarily suspended by a crane. As the solidification process progresses, the stress changes due to the change of the cement slurry components, and the supporting force on the steel pipe column will also change, which may lead to situations such as the inclination and axis deviation of the steel pipe column. However, the crane lifting method cannot effectively prevent such situations from occurring. Summary of the Invention

[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a support device for steel pipe columns of cast-in-place piles, which is used to solve the problem that the crane needs to be occupied all the time during the concrete solidification process in the prior art.

[0005] To achieve the above object and other related objects, the present invention provides a support device for steel pipe columns of cast-in-place piles, which is used to support the steel pipe columns of cast-in-place piles. The steel pipe columns are located inside the cast-in-place piles and the ends are higher than the cast-in-place piles.

[0006] The support device for steel pipe columns of cast-in-place piles includes multiple groups of support structures uniformly arranged circumferentially around the cast-in-place pile. The support structure includes a base, a support arm, a bearing assembly, and a power assembly.

[0007] The base is fixedly installed on the ground, and the axis of the base is perpendicular to the axis of the cast-in-place pile. One end of the support arm is connected to the base through a sliding block and can slide and rotate relative to the base.

[0008] The bearing assembly is rotatably connected to the other end of the support arm. The bearing assemblies of multiple support structures are in contact with each other and fixedly connected to form a support platform. There is a pile hole in the middle of the support platform for the steel pipe column to pass through.

[0009] The power of the power assembly is connected to the sliding block and drives the sliding block to slide. At this time, the support arm connected to the sliding block forms a linkage mechanism and lifts the support platform to the support flange of the steel pipe column.

[0010] Optionally, protrusions are arranged at intervals on the inner bottom of the base. Multiple grooves are provided at the bottom of the sliding block. The width and setting gap of the grooves are the same as the setting width and gap of the protrusions. A limit block is correspondingly arranged in each groove.

[0011] The limit block is connected to the inside of the groove through a first elastic member. The limit block is provided with a chamfer on the side facing the steel pipe column and is located inside the groove. The other side of the limit block protrudes from the groove.

[0012] When the sliding block moves towards the steel pipe column, the protrusion pushes the limit block into the groove to achieve sliding. When the sliding block moves in the reverse direction, the limit block will snap into the space between the protrusions, thereby preventing the sliding block from sliding.

[0013] Optionally, locking grooves are provided on both sides of the base, and locking screw holes are provided on both sides of the sliding block. When the sliding block cooperates with the base, the locking screw holes and the locking grooves are at the same height. At this time, bolts can be used to penetrate the base and the sliding block and lock them, thereby restricting the sliding of the sliding block.

[0014] Optionally, a rotating seat is provided on the bottom surface of the bearing assembly. The bearing assembly is connected to the support arm through the rotating seat. The top surface of the bearing assembly is a smooth support surface. The inner side of the bearing assembly is arc-shaped, and first connection holes are provided at both outer ends. The adjacent bearing assemblies are connected through the first connection holes, and multiple bearing assemblies are connected to form a closed support platform.

[0015] Optionally, the bearing assembly includes a support member and a contact member. The support member is rotatably connected to the support arm. The contact member is located above the support member. An upper opening of the support member forms a first cavity. The upper part of the contact member is a smooth support surface. The lower part of the contact member is matched with the first cavity and can slide up and down. A plurality of annular columns are arranged in the first cavity. A plurality of second elastic members are fixed to the inner side of the contact member. When the contact member cooperates with the support member, the second elastic members are located in the annular columns.

[0016] Optionally, a second cavity is further provided on the side of the support member facing the steel pipe column. A bladder is arranged in the second cavity, and the bladder is connected to a pneumatic source or a hydraulic source through a pressure regulating valve.

[0017] Optionally, the bladder includes a cord fabric skeleton and a rubber layer, and the cord fabric skeleton is laminated in the rubber layer.

[0018] Optionally, the power assembly includes a mounting seat, a power shaft, a guide shaft and a cable. The two mounting seats are symmetrically arranged on both sides of the base and are located between the base and the steel pipe column. The power shaft and the guide shaft are rotatably mounted on the two mounting seats.

[0019] The axis of the guide shaft is at the same height as the axis of the sliding block, and the axis of the power shaft is higher than the guide shaft.

[0020] A first gear is respectively installed at both ends of the power shaft. A second gear is further provided on the power shaft of one of the power assemblies, and the second gear meshes with the power gear of the power source.

[0021] The first gears between two adjacent power assemblies are meshed, so as to realize power synchronization between multiple power assemblies. A wire winding disc is installed in the middle of each power shaft. One end of the cable is fixedly connected to the sliding block, and the other end is wound and fixed on the wire winding disc. When the wire winding disc rotates, the sliding block is pulled to slide.

[0022] Optionally, there are four groups of the support structures, which are arranged in pairs opposite to each other. A first pulley and a second pulley are further installed on each power shaft. The diameter of the first pulley is smaller than that of the second pulley. The two groups of first pulleys and second pulleys are symmetrically installed on both sides of the wire winding disc. One group of symmetrically arranged power assemblies are connected through a first transmission belt and the two first pulleys, and the other group of power assemblies are connected through a second transmission belt and the two second pulleys.

[0023] Optionally, the multiple mounting seats are fixedly connected into a whole by a connecting plate.

[0024] As described above, a steel pipe column support device for a cast-in-place pile of the present invention has at least the following beneficial effects:

[0025] 1. Reduction of crane occupation: In the prior art, one bored pile requires a crane for several days. During the construction of multiple bored piles, it is impossible to obtain multiple cranes. Even if there are multiple cranes and all of them are occupied, the project will come to a complete standstill for the next few days and can only continue after solidification, seriously affecting the construction period and thus increasing time and costs. The bored pile steel pipe column support device provided by the present invention includes a base, a support arm, a bearing assembly and a power assembly, which can replace the crane and release the crane from occupation for construction in other places;

[0026] 2. Improvement of the installation accuracy of the steel pipe column: In the prior art, the crane cannot maintain the axis accuracy of the steel pipe column. The bored pile steel pipe column support device provided by the present invention is provided with multiple air bags around the steel pipe column, and the axis of the steel pipe column can be finely adjusted by adjusting the air bag pressure to radially jack up the steel pipe column until the verticality of the steel pipe column meets the requirements. Description of the Drawings

[0027] Figure 1 Shown is a schematic diagram of a single support structure of the bored pile steel pipe column support device of the present invention.

[0028] Figure 2 Shown is a combined schematic diagram of the bored pile steel pipe column support device of the present invention.

[0029] Figure 3 Shown is a schematic diagram of the support height adjustment of the bored pile steel pipe column support device of the present invention.

[0030] Figure 4 Shown is a schematic diagram of the connection between the base and the support arm of the bored pile steel pipe column support device of the present invention.

[0031] Figure 5 Shown is an axonometric schematic diagram of the sliding block of the bored pile steel pipe column support device of the present invention.

[0032] Figure 6 Shown is a bottom schematic diagram of the sliding block of the bored pile steel pipe column support device of the present invention.

[0033] Figure 7 Shown is a side view of the connection between the base and the support arm of the bored pile steel pipe column support device of the present invention.

[0034] Figure 8 Shown is a schematic diagram of the bearing assembly of the bored pile steel pipe column support device of the present invention.

[0035] Figure 9 Shown is an internal schematic diagram of the bearing assembly of the bored pile steel pipe column support device of the present invention.

[0036] Figure 10 Shown is a schematic diagram of the air bag of the bored pile steel pipe column support device of the present invention.

[0037] Figure 11 It shows a schematic diagram of the power component of the steel pipe column support device for cast-in-place piles of the present invention.

[0038] Figure 12 It shows a combined schematic diagram of the power component of the steel pipe column support device for cast-in-place piles of the present invention.

[0039] Figure 13 It shows a combined schematic diagram of the power component of the steel pipe column support device for cast-in-place piles of the present invention.

[0040] Wherein: base 1, sliding block 10, groove 101, limit block 102, first elastic member 103, locking screw hole 104, protrusion 11, locking groove 12, support arm 2, bearing assembly 3, rotating seat 30, first connection hole 31, support surface 32, support member 33, annular column 330, first cavity 331, second cavity 332, second elastic member 34, contact member 35, bladder 36, support platform 37, pile hole 371, second connection hole 38, power component 4, power source 40, power gear 401, mounting seat 41, power shaft 42, first gear 421, wire reel 422, second gear 423, guide shaft 45, first pulley 424, second pulley 425, cable 46, first transmission belt 48, second transmission belt 49, connecting plate 44, steel pipe column 5, support flange 51. Detailed implementation manners

[0041] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0042] Please refer to Figures 1 to 13 . It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limited conditions for the implementation of the present invention. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" used in this specification are only for the convenience of clear narration, and are not used to limit the scope for the implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope for the implementation of the present invention.

[0043] The following individual embodiments are only for illustration. Combinations can be made between individual embodiments, and it is not limited to the content shown in the following single embodiment.

[0044] In this embodiment, please refer to Figure 1, a steel pipe column support device provided by the present invention is used to support the steel pipe column 5 of the cast-in-place pile. The steel pipe column 5 is located inside the cast-in-place pile and its end is higher than the cast-in-place pile.

[0045] The steel pipe column support device of the cast-in-place pile includes multiple groups of support structures uniformly arranged circumferentially around the cast-in-place pile. The support structure includes a base 1, a support arm 2, a bearing assembly 3, and a power assembly 4.

[0046] The base 1 is fixedly installed on the ground, and the axis of the base 1 is perpendicular to the axis of the cast-in-place pile. One end of the support arm 2 is connected to the base 1 through a sliding block 10 and can slide and rotate relative to the base 1.

[0047] The bearing assembly 3 is rotatably connected to the other end of the support arm 2. Please refer to Figure 2 , the bearing assemblies 3 of multiple support structures are in contact with each other and fixedly connected to form a support platform 37. There is a pile hole 371 in the middle of the support platform 37 for the steel pipe column 5 to pass through.

[0048] The power of the power assembly 4 is connected to the sliding block 10 and drives the sliding block 10 to slide. At this time, the support arm 2 connected to the sliding block 10 forms a linkage mechanism and lifts the support platform 37 to the support flange 51 of the steel pipe column 5.

[0049] The combination of multiple support structures makes the installation of the support device in this embodiment more convenient. The support device can be intervened after the construction of the foundation pile, and the device can be assembled by the way of clamping instead of installing this device first during the construction of the foundation pile.

[0050] When the underground structure is constructed by the top-down method, the foundation pile is constructed first. It generally adopts the form of inserting a structural column at the bottom of the cast-in-place pile. The steel pipe column structural pile is one of the common forms. During the construction of the steel pipe column, its guiding, positioning and plumb adjustment have great technical difficulties, and it also has a direct impact on the bearing capacity and stability of the vertical support system. It is one of the key technologies in the top-down construction.

[0051] During construction, first use a rotary drilling rig to drill the required pile hole by the "step-by-step drilling" method, then use the hoisting method to hoist the steel reinforcement cage weighing several tons into the hole at one time, and then carry out the pouring of the super-retarding concrete pile foundation. C50 super-retarding underwater concrete can be used, with an initial setting time of not less than 48h and a final setting time of not more than 72h.

[0052] During this process, install the steel pipe column. Pay special attention to the installation accuracy. Use a horizontal adjuster and a vertical calibration device for fine adjustment. After accurate positioning, insert it. During the process, pay attention to the verticality of the steel pipe column at any time through a vertical sensor and adjust it in time.

[0053] After the steel pipe column is inserted, a crane is needed to lift the steel pipe column for 72 hours to wait for the concrete to reach final set. A 350t truck crane can be used. However, during this process, the crane will be occupied all the time. When multiple piles are constructed simultaneously, it is impossible to allocate enough cranes, and the long occupation time will also lead to delays in the project schedule and increased costs.

[0054] In the prior art, there is also a way to use a lap support platform to replace the crane. However, the process of lapping and disassembling the support platform is time-consuming, and this support is only used for temporary support for a few days. Just when the lapped platform is just right, the required support period ends, and it has to be disassembled immediately.

[0055] The cast-in-place pile steel pipe column support device provided in this embodiment realizes the effect of efficient quick installation and quick disassembly of the support platform by means of mechanical combination, completely releases the crane, and has strong practicability and convenience. During specific implementation, first construct according to the normal steps. After the steel pipe column is inserted, install this support device around the steel pipe column. First install the base and the power assembly, and then install the support arm and the bearing assembly. The length and cross-section of the support arm need to be designed according to the height and load to be supported actually. The base can be assembled. The base guide rails in all directions are spliced by multiple short rails into long rails, which is convenient for the manufacture, transportation and storage of the base.

[0056] After the device is assembled, use the power device to simultaneously push the sliding blocks at the bottom of each support arm along the guide rail, and the bearing assembly can be moved upward. Please refer to Figure 3 . In the initial stage, it can be quickly lifted. When the bearing assembly is about to contact the support flange of the steel pipe column, reduce the lifting speed, slowly and gradually approach until it contacts and supports the steel pipe column. The support situation can be judged by the load condition of the crane. When the crane no longer bears the load, it means that the support is in place. At this time, stop lifting, remove the cable of the crane, and release the crane. In order to reduce space occupation, the redundant base can also be removed first, and only the section where the support arm is located is left.

[0057] Generally speaking, in addition to not occupying the crane, this device also has the advantages of convenient disassembly and assembly and convenient implementation compared with the prior art.

[0058] For this embodiment, please refer to FIGS. 4 Figure 5 and Figure 6 . A plurality of protrusions 11 are arranged at intervals on the inner bottom of the base 1. A plurality of grooves 101 are provided at the bottom of the sliding block 10. The width and setting gap of the grooves 101 are the same as the setting width and gap of the protrusions 11. A limiting block 102 is correspondingly arranged in each groove 101.

[0059] The stop block 102 is connected to the groove 101 through a first elastic member 103. The stop block 102 has a chamfered side facing the steel pipe column 5 and is located in the groove 101. The other side of the stop block 102 protrudes from the groove 101.

[0060] When the sliding block 10 moves toward the steel pipe column 5, the protrusion 11 pushes the limit block 102 into the groove 101 to achieve sliding. When the sliding block 10 moves in the opposite direction, the limit block 102 will be stuck between the protrusions 11, thereby preventing the sliding block 10 from sliding.

[0061] When the device supports the steel pipe column, it will also be subject to the reaction force of the steel pipe column. The reaction force of the steel pipe column will be transmitted to the sliding block in the opposite direction along the support arm, generating a backward thrust on the sliding block. In this process, if the forward thrust of the power source on the sliding block is less than the reaction force generated by the steel pipe column on the sliding block, the sliding block will move in the opposite direction, which will lead to support failure and may cause safety hazards.

[0062] Therefore, in this embodiment, a backward locking function is designed. After the entire cast-in-place pile steel pipe column support device is installed, the sliding seat can only drive the support arm to perform lifting movement, and will not move in the opposite direction. Even if the external power source is suddenly interrupted during the lifting or supporting process, the supporting state can be maintained, which effectively improves reliability and safety.

[0063] For this example, please refer to Figure 7 and Figure 8 The base 1 is provided with locking grooves 12 on both sides, and the sliding block 10 is provided with locking screw holes 104 on both sides. When the sliding block 10 is matched with the base 1, the locking screw holes 104 and the locking grooves 12 are located at the same height. At this time, bolts can be used to penetrate the base 1 and the sliding block 10 and lock them, thereby limiting the sliding of the sliding block 10.

[0064] Based on the scenario of preventing the slider from moving backward mentioned in the previous embodiment, this embodiment provides another way, that is, after the support is in place, locking is implemented by the cooperation of the locking groove and the locking screw hole. The difference between this embodiment and the previous embodiment is that in the previous embodiment, the device will automatically lock during the lifting process, and only lock the reverse sliding, and the forward sliding is still possible; in this embodiment, the locking process requires manual insertion and tightening of the bolt, and it is a two-way locking, and the sliding block can neither move forward nor backward.

[0065] During specific implementation, you can choose as needed, or use them at the same time. Use the automatic locking method during the lifting process, and add the manual locking method after the lifting is completed. The combination of the two will provide more reliable performance.

[0066] For this example, please refer to Figure 2and Figure 8 A rotating base 30 is provided on the bottom surface of the bearing assembly 3. The bearing assembly 3 is connected to the support arm 2 through the rotating base 30. The top surface of the bearing assembly 3 is a smooth support surface 32. The inner side of the bearing assembly 3 is arc-shaped, and first connection holes 31 are provided at both outer ends. The adjacent bearing assemblies 3 are connected through the first connection holes 31, and a plurality of the bearing assemblies 3 are interconnected to form a closed support platform 37.

[0067] Please refer to Figure 9 , the bearing assembly 3 includes a support member 33 and a contact member 35. The support member 33 is rotatably connected to the support arm 2. The contact member 35 is located above the support member 33. An upper opening of the support member 33 forms a first cavity 331. The upper part of the contact member 35 is a smooth support surface 32. The lower part of the contact member 35 is matched with the first cavity 331 and can slide up and down. A plurality of annular columns 330 are arranged in the first cavity 331. A plurality of second elastic members 34 are fixed inside the contact member 35. When the contact member 35 is matched with the support member 33, the second elastic members 34 are located in the annular columns 330.

[0068] During on-site construction, the weight of the steel pipe column is very large, and even a little axis inclination may cause very large load differences at various positions around the steel pipe column. During the lifting process of the cast-in-place pile steel pipe column support device in this embodiment, when the support platform gradually approaches the support flange of the steel pipe column, the support surfaces of each support structure may not contact simultaneously. Some contact first and some contact later, thus resulting in load and stroke differences of each support structure.

[0069] Therefore, in this embodiment, a second elastic member is provided as a buffer device to ensure a flexible transition during the support process. Especially during the process that the support load is gradually transferred from the crane to the support device in this embodiment, the stability and reliability of the support of this support device are effectively improved.

[0070] Please refer to this embodiment Figure 10 , a second cavity 332 is further provided on one side of the support member 33 facing the steel pipe column 5. A bladder 36 is arranged in the second cavity 332. The bladder 36 is connected to an air pressure source or a hydraulic pressure source through a pressure regulating valve.

[0071] As an important support structure during the top-down excavation process, the installation accuracy of the steel pipe column not only affects the structural safety during the excavation process, but also has a direct impact on the bearing capacity and stability of the vertical support system.

[0072] During the on-site construction process, when the steel pipe column is inserted into the cast-in-place pile, the concrete slurry has not completely solidified yet. At this time, the steel pipe column is temporarily supported by the cast-in-place pile steel pipe column support device of this embodiment. However, during the solidification process, as the solidification process progresses, the components of the cement slurry change, the stress changes, and the supporting force on the steel pipe column will also change, which may cause situations such as the inclination and axis deviation of the steel pipe column.

[0073] Therefore, this embodiment adds a bladder device, which is arranged around the steel pipe column. Each bladder is respectively connected to an air pressure source or a hydraulic source by an independent pressure regulating valve. When it is detected that the steel pipe column is inclined, the air pressure difference between the bladders can be adjusted, so as to radially jack up the steel pipe column and give the steel pipe column a lateral force, thereby adjusting the axis of the steel pipe column, ensuring the vertical accuracy of the steel pipe column, and ensuring that the building meets the design requirements.

[0074] Furthermore, the bladder 36 includes a cord fabric skeleton and a rubber layer, and the cord fabric skeleton is laminated inside the rubber layer. The self-weight of the steel pipe column is extremely large. In order to effectively adjust, the bladder needs to be able to withstand extremely large pressures, so a cord fabric skeleton structure is provided, and a similar structure is also applied to automobile tires.

[0075] Please refer to this embodiment Figure 11 The power assembly 4 includes a mounting seat 41, a power shaft 42, a guide shaft 45 and a cable 46. The two mounting seats 41 are symmetrically arranged on both sides of the base 1 and are located between the base 1 and the steel pipe column 5. The power shaft 42 and the guide shaft 45 are rotatably mounted on the two mounting seats 41.

[0076] The axis of the guide shaft 45 is at the same height as the axis of the sliding block 10, and the axis of the power shaft 42 is higher than the guide shaft 45.

[0077] A first gear 421 is respectively installed at both ends of the power shaft 42. A second gear 423 is also provided on the power shaft 42 of one of the power assemblies 4. The second gear 423 meshes with the power gear 401 of the power source 40.

[0078] The first gears 421 between two adjacent power assemblies 4 are meshed, so as to realize power synchronization between multiple power assemblies 4. A cable reel 422 is installed in the middle of each power shaft 42. One end of the cable 46 is fixedly connected to the sliding block 10, and the other end is wound and fixed on the cable reel 422. When the cable reel 422 rotates, the sliding block 10 is pulled to slide.

[0079] The above embodiments provide a specific implementation method for the power assembly of the steel pipe column support device for bored piles. In this embodiment, the same power source is used among multiple support structures, and the power is synchronized through gears. The beneficial effects are that it not only saves power devices and simplifies the system structure but also improves reliability. Specifically, the steel pipe column support device for bored piles includes multiple load-bearing components, and the load-bearing components are combined into a support platform. If the power among the support structures cannot be synchronized, the steel pipe column support device for bored piles itself will be damaged by its own power, and the parts will pull each other, resulting in failure.

[0080] In addition, in this embodiment, a cable is used as the power transmission device, which also improves the practicality of the system. Compared with the conventional shaft drive, the system is more flexible, concise, occupies less space, and is convenient for installation and maintenance. After the main components are installed, the cable is connected to the cable reel and the sliding block to start construction.

[0081] Please refer to Figure 12 and Figure 13 , there are four groups of the support structures, which are arranged in pairs opposite to each other. A first pulley 424 and a second pulley 425 are further installed on each power shaft 42. The diameter of the first pulley 424 is smaller than that of the second pulley 425. The two groups of the first pulleys 424 and the second pulleys 425 are symmetrically installed on both sides of the cable reel 422. One group of the symmetrically arranged power assemblies 4 is connected by a first transmission belt 48 and the two first pulleys 424, and the other group of the power assemblies 4 is connected by a second transmission belt 49 and the two second pulleys 425.

[0082] On the basis of the previous embodiment, this embodiment further connects the support structures arranged in pairs opposite to each other by a synchronous belt. The beneficial effects are as follows: First, the power is synchronized. The power that originally needed to be synchronized after being transmitted by bevel gears multiple times is now directly synchronized, reducing the efficiency loss in the bevel gear transmission process. Second, during the lifting process, when pulling the sliding block, the loads received between the support structures arranged in pairs opposite to each other are opposite. Through the connection of the transmission belt, it is beneficial to the internal cancellation of the loads and increases the system performance.

[0083] Please refer to Figure 12 and Figure 13 , the multiple mounting seats 41 are fixedly connected into a whole by a connecting plate 44. On the basis of connecting the transmission shafts by a transmission belt, this embodiment further uses a structural connecting plate to connect the mounting seats of each power shaft together, so that the loads between the power shafts cancel each other out, further increasing the stability of the system.

[0084] In summary, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0085] The above embodiments are only illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A steel pipe column support device for cast-in-place piles, used to support the steel pipe column of the cast-in-place pile. The steel pipe column (5) is located inside the cast-in-place pile and its end is higher than the cast-in-place pile. It is characterized in that: The steel pipe column support device for cast-in-place piles includes multiple groups of support structures evenly arranged circumferentially around the cast-in-place pile. The support structure includes a base (1), a support arm (2), a bearing assembly (3) and a power assembly (4). The base (1) is fixedly installed on the ground, and the axis of the base (1) is perpendicular to the axis of the cast-in-place pile. One end of the support arm (2) is connected to the base (1) through a sliding block (10) and can slide and rotate relative to the base (1). The bearing assembly (3) is rotatably connected to the other end of the support arm (2). The bearing assemblies (3) of multiple support structures are in contact with each other and fixedly connected to form a support platform (37). There is a pile hole (371) in the middle of the support platform (37) for the steel pipe column (5) to pass through. The power of the power assembly (4) is connected to the sliding block (10) and drives the sliding block (10) to slide. At this time, the support arm (2) connected to the sliding block (10) forms a linkage mechanism and lifts the support platform (37) to the support flange (51) of the steel pipe column (5). The power assembly (4) includes a mounting seat (41), a power shaft (42), a guide shaft (45) and a cable (46). The two mounting seats (41) are symmetrically arranged on both sides of the base (1) and are located between the base (1) and the steel pipe column (5). The power shaft (42) and the guide shaft (45) are rotatably installed on the two mounting seats (41). The axis of the guide shaft (45) is at the same height as the axis of the sliding block (10), and the axis of the power shaft (42) is higher than the guide shaft (45). A first gear (421) is installed at each end of the power shaft (42). A second gear (423) is also provided on the power shaft (42) of one of the power assemblies (4). The second gear (423) meshes with the power gear (401) of the power source (40). The first gears (421) between two adjacent power assemblies (4) are meshed, so as to realize power synchronization between multiple power assemblies (4). A cable reel (422) is installed in the middle of each power shaft (42). One end of the cable (46) is fixedly connected to the sliding block (10), and the other end is wound and fixed on the cable reel (422). When the cable reel (422) rotates, it pulls the sliding block (10) to slide.

2. The steel pipe column support device for cast-in-place piles according to claim 1, characterized in that: Protrusions (11) are arranged at intervals on the inner bottom of the base (1). Multiple grooves (101) are provided at the bottom of the sliding block (10). The width and setting gap of the grooves (101) are the same as the setting width and gap of the protrusions (11). A limiting block (102) is correspondingly arranged in each groove (101). The limiting block (102) is connected to the inside of the groove (101) through a first elastic member (103). The limiting block (102) has a chamfer on the side facing the steel pipe column (5) and is located inside the groove (101). The other side of the limiting block (102) protrudes out of the groove (101). When the sliding block (10) moves towards the steel pipe column (5), the protrusion (11) pushes the limiting block (102) into the groove (101) to achieve sliding. When the sliding block (10) moves in the reverse direction, the limiting block (102) will get stuck between the protrusions (11), thereby preventing the sliding block (10) from sliding.

3. The cast-in-place pile steel pipe column support device according to claim 2, wherein Locking grooves (12) are provided on both sides of the base (1). Locking screw holes (104) are provided on both sides of the sliding block (10). When the sliding block (10) cooperates with the base (1), the locking screw holes (104) and the locking grooves (12) are at the same height. At this time, a bolt can pass through the base (1) and the sliding block (10) and be tightened, thereby restricting the sliding of the sliding block (10).

4. The cast-in-place pile steel pipe column support device according to claim 1, characterized in that, A rotating seat (30) is provided on the bottom surface of the bearing assembly (3). The bearing assembly (3) is connected to the support arm (2) through the rotating seat (30). The top surface of the bearing assembly (3) is a smooth support surface (32). The inner side of the bearing assembly (3) is arc-shaped, and first connection holes (31) are provided at both outer ends. The adjacent bearing assemblies (3) are connected through the first connection holes (31), and multiple bearing assemblies (3) are connected to each other to form a closed support platform (37).

5. The cast-in-place pile steel pipe column support device according to claim 4, characterized in that, The bearing assembly (3) includes a support member (33) and a contact member (35). The support member (33) is rotatably connected to the support arm (2). The contact member (35) is located above the support member (33). The upper part of the support member (33) is open to form a first cavity (331). The upper part of the contact member (35) is a smooth support surface (32). The lower part of the contact member (35) cooperates with the first cavity (331) and can slide up and down. A plurality of annular columns (330) are arranged in the first cavity (331). A plurality of second elastic members (34) are fixed to the inner side of the contact member (35). When the contact member (35) cooperates with the support member (33), the second elastic members (34) are located in the annular columns (330).

6. The cast-in-place pile steel pipe column support device according to claim 5, characterized in that A second cavity (332) is further provided on the side of the support member (33) facing the steel pipe column (5). A bladder (36) is arranged in the second cavity (332). The bladder (36) is connected to a pneumatic source or a hydraulic source through a pressure regulating valve.

7. The cast-in-place pile steel pipe column support device according to claim 6, characterized in that, The bladder (36) includes a cord fabric skeleton and a rubber layer, and the cord fabric skeleton is laminated inside the rubber layer.

8. The cast-in-place pile steel pipe column support device according to claim 1, wherein, There are four groups of the support structures, which are arranged in pairs opposite to each other. A first pulley (424) and a second pulley (425) are also installed on each power shaft (42). The diameter of the first pulley (424) is smaller than that of the second pulley (425). The two groups of the first pulleys (424) and the second pulleys (425) are symmetrically installed on both sides of the wire winding disc (422). Between one group of the symmetrically arranged power components (4), they are connected by a first transmission belt (48) and the two first pulleys (424). Between the other group of the power components (4), they are connected by a second transmission belt (49) and the two second pulleys (425).

9. The cast-in-place pile steel pipe column support device according to claim 1, wherein Between the multiple mounting seats (41), they are fixedly connected into a whole by a connecting plate (44).

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