Construction method of a water-based building structure based on a hanging box

Abstract

The present application relates to the field of water construction structure construction, and particularly relates to a water construction structure construction method based on a hanging box, comprising the following steps: S1, installing the hanging box on the underwater pipe pile; S2, hoisting the water collecting well filled with floating bodies into the installation opening of the hanging box; S3, pouring the bottom sealing concrete on the bottom plate, and embedding the shear leg installed on the outer periphery of the water collecting well in the bottom sealing concrete; S4, after the bottom sealing concrete reaches the preset strength, the water in the hanging box is pumped out; S5, laying the steel bars and the formwork on the bottom sealing concrete, forming the pouring space between the formwork and the hanging box, and pouring the structure concrete in the pouring space; and S6, disassembling the hanging box and the formwork, and completing the construction. The present application utilizes the floating bodies inside the water collecting well to improve the buoyancy and reduce the hoisting tension when hoisting the water collecting well; after the water in the hanging box is pumped out, the shear leg fixed in the bottom sealing concrete is used for anti-floating, which can guarantee the safety of the subsequent construction.

Description

Technical Field

[0001] This invention relates to the field of construction of floating structures, and in particular to a construction method for floating structures based on caissons. Background Technology

[0002] In the construction of underwater structures, especially those with water storage structures such as swimming pools, it is common practice to build a caisson on piles driven into the water. The caisson is then used as a template for constructing the pool structure. After construction, the caisson may be submerged or contain a certain level of water. For the construction of pool ancillary facilities, such as sump pits or pump houses, which need to be installed on the base of the caisson, a hoisting method is typically used. Specifically, hoisting equipment is used to lift the sump pit from above the water surface to its installation position on the underwater caisson base. Since the sump pit's structure is similar to a cylindrical container, as it is lowered… In the initial stage, the buoyancy of the sump can be used to reduce the lifting load. However, as the sump is lowered below the water surface, it will fill with water, increasing the lifting load. In addition, after the sump is installed on the bottom plate of the caisson, the water inside the caisson needs to be pumped out to form a dry construction area for subsequent concrete pouring. After pumping out the water, the buoyancy of the sump will be greater than its own weight, causing it to float. Therefore, the instability risks and safety hazards caused by the change in stress mode during the installation and subsequent construction of the sump need to be overcome by improving the corresponding construction methods. Summary of the Invention

[0003] The purpose of this invention is to overcome the technical problem that existing floating pool structures, such as caissons, experience instability and safety hazards during construction due to changes in the stress mode of their auxiliary facilities (such as water collection wells), and to provide a construction method for floating building structures based on caissons.

[0004] This invention provides a construction method for a floating structure based on a caisson, comprising:

[0005] S1: Construct several pipe piles at the pre-set underwater pile positions, and install a base plate and side plates on the pipe piles to form a lifting box; an installation port for a water collection well is formed on the base plate; S2: The water collection well filled with float is hoisted to the top of the base plate and lowered, so that the water collection well is suspended in the installation port; S3: Place the shear bracket installed on the outer periphery of the water collection well onto the base plate; pour bottom sealing concrete on the base plate and embed the shear bracket in the bottom sealing concrete; S4: After the bottom sealing concrete reaches the preset strength, drain the water from the hopper; S5: Reinforcing bars and formwork are laid on the bottom concrete, and a pouring space is formed between the formwork and the caisson. Structural concrete is poured in the pouring space. S6: Disassemble the caisson and the template to complete the construction of the floating structure.

[0006] This invention employs floats to fill the interior of the water collection well before installation. This prevents the well from filling with water after installation, thus avoiding increased lifting weight. The floats also increase buoyancy, further reducing lifting weight and facilitating the suspension of the well in the underwater installation opening. During lifting, buoyancy is used to reduce lifting tension. When pouring the bottom sealing concrete underwater, shear supports for the well can be embedded in the concrete. Once the concrete has solidified and met strength requirements, the water in the caisson can be pumped out to create a dry construction area for subsequent structural concrete pouring. After pumping out the water, the water pressure above the well disappears, leaving only the buoyancy of the water below. This increases the overall buoyancy of the well, allowing the shear supports fixed in the bottom sealing concrete to resist buoyancy and prevent the well from lifting off the base plate and causing leakage in the caisson. This ensures the stability and safety of subsequent construction.

[0007] Preferably, in step S2, the step of suspending the water collection well in the installation port includes: S21: The water collection well is lowered into the installation opening using a crane installed outside the caisson; and a suspension beam is erected on the upper end of the casing of the pipe pile around the installation opening to form a suspension system, so that the suspension beam is located above the water collection well; S22: Connect the water collection well to the lifting beam with a sling, and then disconnect the crane from the water collection well.

[0008] Before installation, the sump well is prefabricated and then transported to the construction area by transport equipment for installation. For example, the sump well can be transported by a barge and then lifted by a crawler crane on the barge, or it can be transported by vehicle from land to the shore near the construction area and then lifted by a crane. Since the sump well needs to be suspended for a long time after being lifted into the installation opening, it usually takes several days to be released from suspension after the bottom sealing concrete is poured and the water is pumped out. Therefore, the crane suspension needs to be changed to suspension through a fixed suspension system set in the lifting box until the bottom sealing concrete is poured and the water pumping operation is completed. The suspension system can use the steel casing of the pipe pile next to the installation opening, and a lifting beam is erected on the steel casing to form a flat beam structure. Then, the sump well is suspended in the installation opening by slings.

[0009] Preferably, in S1, the construction steps of the base plate include: S11: Install clamps on the piles such that the clamps are located in the same horizontal plane; S12: Align the reserved holes on the base plate with the pipe pile, lower the base plate from top to bottom, and place the base plate above the several clamps.

[0010] The base plate can be assembled from multiple steel plates. It can be prefabricated in the factory and assembled on the construction site. During the prefabrication of the base plate, holes are reserved at the positions of the pipe pile casing and the water collection well. These holes correspond to the reserved holes of the pipe pile casing and the installation openings of the water collection well. The dimensions of the reserved holes and installation openings are larger than the outer diameter of the pipe pile casing and the outer contour dimensions of the water collection well. During the on-site installation of the base plate, multiple base plates can be assembled into a whole on land by bolting, and then hoisted and installed on the pipe pile clamps as a whole. Alternatively, they can be hoisted onto the pipe pile clamps in sections and then assembled underwater to form the base plate as a whole.

[0011] Preferably, in S11, after the clamps are installed, several horizontal beams and several vertical beams are erected on top of the clamps, and the horizontal beams and the vertical beams intersect to form a base plate support structure; in S12, the base plate is placed on top of the base plate support structure.

[0012] To ensure uniform stress on the base plate, a base plate support structure consisting of multiple intersecting horizontal and vertical beams needs to be installed on the pipe pile clamps before the base plate is installed. The base plate support structure can cover the installation area of ​​the base plate. When installing the base plate, the base plate is placed on the base plate support structure. The base plate support structure can also support areas on the base plate where no pipe piles are installed. The supporting force provided by the pipe pile clamps can be evenly transferred to the base plate through the base plate support structure, avoiding uneven stress on the base plate and local collapse.

[0013] Preferably, the base plate includes a support for weak areas, and the construction steps of the base plate further include: The height of the clamps on the pipe piles surrounding the weak support area is adjusted to be lower than the horizontal plane, and a reinforcing beam structure is installed on the clamps on the pipe piles surrounding the weak support area, so that the reinforcing beam structure spans the weak support area.

[0014] For certain areas of the base slab, there may be sections without pipe pile support and with large spans, which are called weak support areas. To address this, additional support structures can be erected on the pipe piles around the weak support areas to strengthen the support effect. For example, a reinforcing beam structure can be added and made to span across the weak support area. This adds an extra support structure to the original base slab support structure, giving the weak support area stronger support performance and further preventing downward deflection in that area.

[0015] Preferably, the reinforcing beam structure includes a spreader beam and a connecting beam, wherein the spreader beam connects the pipe piles located on the same side of the weak support area, and the connecting beam connects the spreader beams located on both sides of the weak support area.

[0016] Specifically, the reinforced beam structure formed by the spreader beam and the connecting beam can form a stable force system. The spreader beam is erected between the pipe piles on the same side, and the connecting beam connects the spreader beams on both sides, so as to form stable support for the weak support area.

[0017] Preferably, in step S6, the step of disassembling the hoisting box includes: S61: Hoist and remove the side plate, and disassemble the clamp; S62: Detach the base plate from the concrete and dismantle the base plate in sections.

[0018] Preferably, in S3, before the bottom sealing concrete is poured, a steel mesh is covered above the bottom slab, the steel mesh is fixedly connected to the casing of several of the pipe piles, and the steel mesh is placed in the pouring area of ​​the bottom sealing concrete.

[0019] Preferably, the method further includes: fixing the steel mesh to the shear brace.

[0020] The bottom plate is placed on the underwater casing clamps. The buoyancy it experiences can be offset by the pressure of the water above and its own weight. However, after the water in the hopper is pumped out, its own weight alone cannot offset the buoyancy, causing it to float upwards and detach from the clamps, which will affect subsequent construction. Therefore, by laying a steel mesh on top of the bottom plate and connecting the steel mesh between each pipe pile casing, the bottom plate can be limited and prevented from floating. At the same time, placing the steel mesh in the pouring space of the bottom sealing concrete allows the steel mesh to be embedded in it during the pouring of the bottom sealing concrete, which can also improve the strength of the bottom sealing concrete.

[0021] Preferably, the method of filling the buoy into the water collection well includes: C1: The float is inserted into the inner cavity of the water collection well, so that the inner cavity of the water collection well is filled; C2: Install the limiting component at the opening of the water collection well.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention provides a construction method for a floating structure based on a caisson. Before installing the sump, floats are used to fill the inside of the sump, preventing it from filling with water after installation and increasing the lifting weight. The floats also increase the buoyancy of the sump, further reducing the lifting weight and facilitating its suspension in the underwater installation opening. During sump lifting, buoyancy is used to reduce the lifting tension. When pouring the bottom sealing concrete underwater, shear supports for the sump can be embedded in the concrete. After the bottom sealing concrete solidifies and meets strength requirements, the water in the caisson can be pumped out to create a dry construction area for subsequent structural concrete pouring. After pumping out the water, the water pressure above the sump disappears, leaving only the buoyancy of the water below. This increases the overall buoyancy of the sump, allowing the shear supports fixed in the bottom sealing concrete to resist buoyancy and prevent the sump from lifting upwards and detaching from the base plate, thus ensuring the stability and safety of subsequent construction. Attached Figure Description

[0023] Figure 1 This is a top-plan view of the caisson (showing the supporting structure below the base plate).

[0024] Figure 2 This is a top-plan view of the caisson (showing the steel mesh above the base plate).

[0025] Figure 3 This is a schematic elevation view of the caisson installed on the pipe pile.

[0026] Figure 4 This is a schematic elevation view of the suspended water collection well.

[0027] Figure 5 This is a top view of the suspension system suspending the water collection well.

[0028] Figure 6 This is a schematic diagram of the connection structure between the water collection well and the bottom plate.

[0029] Figure 7 A schematic diagram of a reinforced beam structure to support the weak area.

[0030] Marked in the image: 1. Pipe pile, 2. Hoist, 3. Hoisting box, 31. Side plate, 32. Bottom plate, 33. Mounting port, 34. Support weak area, 4. Sump well, 41. Shear bracket, 5. Bottom sealing concrete, 6. Suspension system, 7. Bottom plate support structure, 8. Reinforcing beam structure, 81. Spread beam, 82. Connecting beam, 9. Steel mesh, 10. Float, 11. Limiting component. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0032] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of the present invention is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0033] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but that it can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0034] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0035] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as 2, 3, 4, 5, 6, 7, 8, or 9, and can even exceed nine.

[0036] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0037] Example This embodiment provides a construction method for a floating structure based on a caisson.

[0038] Combination Figures 1 to 7 The construction method for the caisson-based floating structure in this embodiment includes the following steps: S1: Construct several pipe piles 1 at the pre-set underwater pile positions, and install a base plate 32 and a side plate 31 on the pipe piles 1 to form a lifting box 3; an installation port 33 for a water collection well 4 is formed on the base plate 32; S2: Hoist the water collection well 4 filled with float 10 to the top of the base plate 32 and lower it so that the water collection well 4 is suspended in the installation port 33; S3: Place the shear bracket 41 installed on the outer periphery of the water collection well 4 on the base plate 32; pour the bottom sealing concrete 5 on the base plate 32 and embed the shear bracket 41 in the bottom sealing concrete 5; S4: After the bottom sealing concrete 5 reaches the preset strength, drain the water from the caisson 3; S5: Reinforcing bars and formwork are laid on the bottom concrete 5, and a pouring space is formed between the formwork and the caisson 3. Structural concrete is poured in the pouring space. S6: Dismantle the caisson 3 and the formwork to complete the construction of the water-based building structure.

[0039] Before installation, the present invention uses floats 10 to fill the interior of the water collection well 4, which prevents the well from being filled with water after being submerged, thus avoiding increased lifting weight. Simultaneously, the floats 10 increase the buoyancy of the well, further reducing the lifting weight and facilitating the suspension of the well 4 in the underwater installation opening 33. During lifting, buoyancy is used to reduce the lifting pull. When pouring the bottom sealing concrete 5 underwater, the shear brackets 41 of the well 4 can be embedded in the bottom sealing concrete 5. 5. After solidification and meeting the strength requirements, the water in the caisson 3 can be drained to form a dry construction area for subsequent structural concrete pouring. After the water in the caisson 3 is drained, the water pressure above the sump 4 disappears, and it only receives the buoyancy of the water below. Therefore, the buoyancy of the sump 4 as a whole increases, and the shear bracket 41 fixed in the bottom sealing concrete 5 can be used to resist buoyancy, preventing the sump 4 from rising and detaching from the bottom plate 32, causing the caisson 3 to leak water, thus ensuring the stability and safety of subsequent construction.

[0040] In this embodiment, combined with Figures 4 to 6 In step S2 above, the step of suspending the water collection well 4 in the installation port 33 includes: S21: Use a crane set outside the caisson 3 to lift the water collection well 4 and lower it into the installation port 33; and set up a suspension beam on the upper end of the casing of the pipe pile 1 around the installation port 33 to form a suspension system 6, so that the suspension beam is located above the water collection well 4; S22: Connect the water collection well 4 to the lifting beam with slings, and then disconnect the crane from the water collection well 4.

[0041] Before installation, the water collection well 4 is prefabricated and then transported to the construction area by transportation equipment for installation. For example, the water collection well 4 can be transported by a barge and then lifted by a crawler crane on the barge, or it can be transported by vehicle from land to the shore near the construction area and then lifted by a crane. Since the water collection well 4 needs to be suspended for a long time after being lifted into the installation port 33, it usually takes several days to release the suspension after the bottom sealing concrete 5 is poured and the water is pumped out. Therefore, the suspension by the crane needs to be changed to suspension by the fixed suspension system 6 set in the lifting box 3 until the bottom sealing concrete 5 is poured and the water pumping operation is completed. The suspension system 6 can use the steel casing of the pipe pile 1 next to the installation port 33, and a lifting beam is erected on the steel casing to form a flat beam 81 structure. Then, the water collection well 4 is suspended in the installation port 33 by slings.

[0042] After the water collection well 4 is installed, shear brackets are welded to the steel casing of pipe pile 1 within the range of the bottom sealing concrete 5. Reinforcing mesh 9 is then arranged on the shear brackets of the steel casing of pipe pile 1 to ensure the bottom plate resists buoyancy through the shear brackets and reinforcing mesh 9. Stress calculation analysis indicates that the bottom sealing concrete 5 can be made of C30 concrete with a thickness of, for example, 0.3m. The bottom sealing concrete 5 is poured in one go, and the elevation of the bottom sealing concrete 5 inside the caisson 3 is consistent. The bottom sealing concrete 5 is poured underwater before the caisson 3 is pumped out, and should be done when waves are small and wind speeds are low. The bottom sealing concrete 5 is poured in one go, with the concrete pumped to the funnel by a pump truck and poured through a duct below the funnel. The duct is used to pour the bottom sealing concrete 5, and the duct layout should meet the requirements of concrete fluidity. The bottom sealing construction is completed before the concrete initially sets. To ensure the waterproofing effect of the bottom sealing concrete 5, before pouring the concrete, an opening is made in the side plate 31 to install a connector to ensure that the water level inside and outside the box is consistent and that the water pressure inside and outside the box is balanced, so as not to affect the quality of the concrete.

[0043] In this embodiment, combined with Figure 1 and Figure 3 In step S1 above, the construction steps of the base plate 32 include: S11: Install clamps 2 on several pipe piles 1 so that the clamps 2 are located in the same horizontal plane; S12: Align the reserved holes on the base plate 32 with the pipe pile 1, lower the base plate 32 from top to bottom, and place the base plate 32 on top of several clamps 2.

[0044] The base plate 32 can be assembled from multiple steel plates. It can be prefabricated in the factory and assembled on the construction site. During the prefabrication of the base plate 32, holes are reserved at the positions of the casing of the pipe pile 1 and the water collection well 4. These holes correspond to the reserved holes of the casing of the pipe pile 1 and the installation openings 33 of the water collection well 4. The dimensions of the reserved holes and the installation openings 33 are larger than the outer diameter of the casing of the pipe pile 1 and the outer contour dimensions of the water collection well 4. During the on-site installation of the base plate 32, multiple base plates 32 can be assembled into a whole on land by bolting, and then hoisted and installed on the clamp 2 of the pipe pile 1 as a whole. Alternatively, they can be hoisted onto the clamp 2 of the pipe pile 1 in sections and then assembled underwater to form the base plate 32 as a whole.

[0045] Alternatively, in step S11 above, after the clamps 2 are installed, several horizontal beams and several vertical beams are erected on top of several clamps 2, and the horizontal beams and vertical beams are interlaced to form a base plate support structure 7; in step S12 above, the base plate 32 is placed on top of the base plate support structure 7.

[0046] To ensure uniform stress on the base plate 32, before installing the base plate 32, a base plate support structure 7, formed by multiple intersecting horizontal and vertical beams, needs to be installed on the pipe pile 1 clamp 2. The base plate support structure 7 can cover the installation area of ​​the base plate 32. When installing the base plate 32, the base plate 32 is placed on the base plate support structure 7. The base plate support structure 7 can also support the area of ​​the base plate 32 where the pipe pile 1 is not installed. The supporting force provided by the pipe pile 1 clamp 2 can be evenly transmitted to the base plate 32 through the base plate support structure 7, avoiding uneven stress on the base plate 32 and local collapse.

[0047] In this embodiment, combined with Figure 1 and Figure 7 The base plate 32 includes a support for the weak area 34, and the construction steps of the base plate 32 also include: Adjust the height of the clamp 2 on the pipe pile 1 surrounding the weak support area 34 to be below the horizontal plane, and install the reinforcing beam structure 8 on the clamp 2 on the pipe pile 1 surrounding the weak support area 34 so that the reinforcing beam structure 8 spans across the weak support area 34.

[0048] For certain areas of the base plate 32, there may be sections without pipe pile 1 support and with large spans, which are called weak support areas 34. To address this, additional support structures can be erected on the pipe piles 1 around the weak support areas 34 to strengthen the support effect. For example, a reinforcing beam structure 8 can be added and span across the weak support areas 34. This adds another support structure to the original base plate support structure 7, giving the weak support areas 34 stronger support performance and further preventing downward deflection in this area.

[0049] Alternatively, the reinforcing beam structure 8 includes a spreader beam 81 and a connecting beam 82. The spreader beam 81 connects the pipe piles 1 on the same side of the weak support zone 34, and the connecting beam 82 connects the spreader beams 81 on both sides of the weak support zone 34.

[0050] Specifically, the reinforced beam structure 8 formed by the spreader beam 81 and the connecting beam 82 can form a stable force system. The spreader beam 81 is erected between the pipe piles 1 on the same side, and the connecting beam 82 connects the spreader beams 81 on both sides, so as to form stable support for the weak support area 34.

[0051] In this embodiment, step S6 above, the step of disassembling the hoisting box 3, includes: S61: Hoist and remove side panel 31, and disassemble clamp 2; S62: Remove the base plate 32 from the concrete and lower it in sections to dismantle the base plate 32.

[0052] Here, in order to reduce the adhesion between the bottom sealing concrete 5 and the bottom plate 32 and reduce the risk and difficulty of removing the bottom plate 32, a circular ring plate can be set in the gap between the bottom plate 32 and the casing of the pipe pile 1 during the installation of the bottom plate 32. The gap between the bottom plate 32 and the casing of the pipe pile 1 is sealed by the circular ring plate before the bottom sealing concrete 5 is poured. The bottom sealing concrete 5 can avoid seeping out from the gap between the bottom plate 32 and the casing of the pipe pile 1 due to the sealing effect of the circular ring plate. When demolding, the circular ring plate can be removed first to expose the gap between the bottom plate 32 and the casing of the pipe pile 1, so as to provide enough space to pry the bottom plate 32 under the bottom sealing concrete 5, thereby promoting the detachment of the bottom plate 32 bonded to the bottom sealing concrete 5 and thus promoting demolding.

[0053] In this embodiment, combined with Figure 2 In step S3 above, before the bottom sealing concrete 5 is poured, a steel mesh 9 is covered above the bottom plate 32, the steel mesh 9 is fixedly connected to the casing of several pipe piles 1, and the steel mesh 9 is placed in the pouring area of ​​the bottom sealing concrete 5.

[0054] Alternatively, step S3 may further include: fixing the steel mesh 9 to the shear bracket 41.

[0055] The bottom plate 32 is placed on the underwater casing clamp 2. The buoyancy it experiences can be offset by the pressure of the water above and its own weight. However, after the water in the hopper 3 is pumped out, its own weight alone cannot offset the buoyancy, and it will float upward and detach from the clamp 2, which will affect subsequent construction. Therefore, by laying a steel mesh 9 on the bottom plate 32 and connecting the steel mesh 9 between each pipe pile 1 casing, the bottom plate 32 can be limited and resisted from floating. At the same time, the steel mesh 9 is placed in the pouring space of the bottom sealing concrete 5, so that the steel mesh 9 can be embedded in it when pouring the bottom sealing concrete 5, which can also play a role in improving the strength of the bottom sealing concrete 5.

[0056] Alternatively, the method of filling the water collection well 4 with the float 10 includes: C1: Insert the float 10 into the inner cavity of the water collection well 4, so that the inner cavity of the water collection well 4 is filled; C2: Install the limiting member 11 at the opening of the water collection well 4.

[0057] Here, the limiting member 11 can be a mesh structure welded from steel bars, with the mesh aperture smaller than the outer diameter of a single float 10. Covering the opening of the water collection well 4, it can prevent the float 10 filled in the water collection well 4 from floating and detaching from the water collection well 4 after water is introduced. The float 10 can be a lightweight object that can float on water, such as plastic foam.

[0058] In summary, this invention provides a construction method for a floating structure based on a caisson. Before installing the sump, floats are used to fill the inside of the sump, preventing it from filling with water and increasing the lifting weight. The floats also increase the buoyancy of the sump, further reducing the lifting weight and facilitating its suspension in the underwater installation opening. During sump lifting, buoyancy is used to reduce the lifting tension. When pouring the bottom sealing concrete underwater, shear supports for the sump can be embedded in the concrete. After the bottom sealing concrete solidifies and meets strength requirements, the water in the caisson can be pumped out to create a dry construction area for subsequent structural concrete pouring. After pumping out the water, the water pressure above the sump disappears, leaving only the buoyancy of the water below. Therefore, the overall buoyancy of the sump increases, allowing the shear supports fixed in the bottom sealing concrete to resist buoyancy and prevent the sump from lifting upwards and detaching from the bottom plate, thus ensuring the stability and safety of subsequent construction.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A construction method for a floating structure based on a caisson, characterized in that, include: S1: Construct several pipe piles (1) at the pre-set underwater pile positions, and install a bottom plate (32) and a side plate (31) on the pipe piles (1) to form a lifting box (3); an installation port (33) is formed on the bottom plate (32). S2: The water collection well (4) filled with float (10) is hoisted to the top of the bottom plate (32) and lowered, so that the water collection well (4) is suspended in the installation port (33); S3: Place the shear bracket (41) installed on the outer periphery of the water collection well (4) on the bottom plate (32); pour the bottom sealing concrete (5) on the bottom plate (32) and embed the shear bracket (41) in the bottom sealing concrete (5); S4: After the bottom sealing concrete (5) reaches the preset strength, the water in the hoisting box (3) is drained; S5: Reinforcing bars and formwork are laid on the bottom concrete (5), and a pouring space is formed between the formwork and the caisson (3). Structural concrete is poured in the pouring space. S6: Disassemble the caisson (3) and the template to complete the construction of the water-based building structure.

2. The construction method for a caisson-based floating structure according to claim 1, characterized in that, In S2, the step of suspending the water collection well (4) in the installation port (33) includes: S21: The water collection well (4) is lowered into the installation port (33) using a crane set outside the hoisting box (3); and a hanging beam is erected on the upper end of the casing of the pipe pile (1) around the installation port (33) to form a suspension system (6), so that the hanging beam is located above the water collection well (4); S22: Connect the water collection well (4) to the lifting beam with a sling, and then disconnect the crane from the water collection well (4).

3. The construction method for a caisson-based floating structure according to claim 1, characterized in that, In S1, the construction steps of the base plate (32) include: S11: Install clamps (2) on several of the pipe piles (1) so that the clamps (2) are located in the same horizontal plane; S12: Align the reserved hole on the base plate (32) with the pipe pile (1), lower the base plate (32) from top to bottom, and place the base plate (32) above several of the clamps (2).

4. The construction method for a caisson-based floating structure according to claim 3, characterized in that, In S11, after the clamps (2) are installed, several horizontal beams and several vertical beams are erected on the top of several clamps (2), and the horizontal beams and the vertical beams intersect to form a base plate support structure (7); in S12, the base plate (32) is placed on top of the base plate support structure (7).

5. The construction method for a caisson-based floating structure according to claim 3, characterized in that, The base plate (32) includes a support for a weak area (34), and the construction steps of the base plate (32) further include: Adjust the height of the clamp (2) on the pipe pile (1) surrounding the weak support area (34) to be lower than the horizontal plane, and install a reinforcing beam structure (8) on the clamp (2) on the pipe pile (1) surrounding the weak support area (34) so ​​that the reinforcing beam structure (8) spans the weak support area (34).

6. The construction method for a caisson-based floating structure according to claim 5, characterized in that, The reinforcing beam structure (8) includes a spreader beam (81) and a connecting beam (82). The spreader beam (81) is connected between the pipe piles (1) located on the same side of the weak support area (34), and the connecting beam (82) is connected between the spreader beams (81) located on both sides of the weak support area (34).

7. The construction method for a caisson-based floating structure according to claim 3, characterized in that, In S6, the step of disassembling the hoisting box (3) includes: S61: Hoist and remove the side plate (31) and disassemble the clamp (2); S62: Remove the base plate (32) from the concrete and dismantle the base plate (32) in sections.

8. The construction method for a caisson-based floating structure according to claim 1, characterized in that, In S3, before the bottom sealing concrete (5) is poured, a steel mesh (9) is covered above the bottom plate (32), the steel mesh (9) is fixedly connected to the casing of several pipe piles (1), and the steel mesh (9) is placed in the pouring area of ​​the bottom sealing concrete (5).

9. The construction method for a caisson-based floating structure according to claim 8, characterized in that, Also includes: The steel mesh (9) is fixedly connected to the shear brace (41).

10. The construction method for a caisson-based floating structure according to claim 1, characterized in that, The method of filling the buoy (10) into the water collection well (4) includes: C1: The float (10) is inserted into the inner cavity of the water collection well (4) to fill the inner cavity of the water collection well (4); C2: Install the limiting member (11) at the opening of the water collection well (4).

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