Method for assembling and disassembling a water beam bed mold

Abstract

The application discloses a kind of water beam bottom mould's installation and disassembly method, it is related to wharf construction technical field.The method includes: installing hoop on pile foundation, and placing I-beam and wood square on the hoop;Laying bottom mould and pouring water beam;Install ring chain type hand tensioner on beam, and through it, I-beam is lifted tight;Remove the connecting bolt of hoop, so that the hoop is hung below I-beam;Drop ring chain type hand tensioner, so that I-beam falls, and wood square and bottom mould are removed in turn;Finally, I-beam and hoop are integrally transferred to land and separated.The application optimizes installation and disassembly process and hoop structure, improves the overall stability of bottom mould system, reduces water operation time and large equipment dependence, effectively reduces construction safety risk and cost, and protects the completed beam from damage.

Description

Technical Field

[0001] This invention relates to the field of wharf construction technology, specifically to a method for installing and dismantling the bottom formwork of a crossbeam on water. Background Technology

[0002] In waterway terminal engineering, the floating beam is a crucial component connecting the pile foundation to the superstructure. Its construction typically involves erecting a bottom formwork system on the pile foundation scaffolding before concrete pouring. Traditional methods for installing and dismantling the bottom formwork of floating beams mainly fall into two categories: Method 1: Using a crane vessel in conjunction with a construction vessel. First, steel clamps are installed on the pile foundation. Then, the crane vessel places the I-beams onto the clamps, followed by the laying of timber and formwork. After the beam is poured, the crane vessel is used again to tighten the I-beams, while the construction vessel moors at the bottom of the beam. Workers then remove the clamps and formwork, and finally, the I-beams are transported to the next work area. This method heavily relies on large crane vessels and barges. Construction is greatly affected by natural conditions such as wind, waves, water levels, and currents. This not only easily leads to project delays and idle time, increasing high equipment rental costs, but also, during the dismantling process, the frequent mooring of the construction vessel at the bottom of the beam greatly increases the risk of collision with the pile foundation, causing damage and resulting in additional repair costs and safety hazards.

[0003] Method Two: To reduce the impact of water flow, some projects opted to construct steel trestle bridges and replace the crane boats with crawler cranes. While this method reduces the impact of water flow to some extent, the lifting equipment requires the trestle bridge passage for extended periods, hindering the transport of materials and the passage of equipment for other processes, leading to a chain reaction of idle work. Furthermore, the command personnel, positioned on the trestle bridge, have a limited field of vision, making it difficult to fully assess the dismantling progress at the bottom of the crossbeams. When hoisting I-beams and other components, collisions with completed crossbeams are possible, causing structural damage, and the construction safety risks remain high.

[0004] Therefore, existing technologies suffer from problems such as long operating time on water, high dependence on large equipment, great influence from the natural environment, easy damage to completed structures, high construction costs, and many safety hazards. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides a method for installing and dismantling the bottom formwork of a crossbeam on water, comprising the following steps: Step S1: Install I-beams; After the pile foundation construction on the water forms a frame, install the clamps on the pile foundation; place the I-beams in sections on both sides of the clamps and tie them together; lay the timber on top of the I-beams; Step S2: Lay the bottom formwork and pour the water beam; Lay the bottom formwork on top of the timber, and pour concrete in the bottom formwork on site to complete the construction of the water beam; Step S3: Install the chain-type manual tensioner; install the chain-type manual tensioner on the crossbeam above water, and tighten the I-beam using the chain-type manual tensioner; Step S4: Remove the bottom formwork; remove the connecting bolts of the bottom clamps of the crossbeam, so that the clamps are vertically hung below the I-beam; lower the chain-type manual tensioner to make the I-beam fall, and then remove the timber and bottom formwork respectively. Step S5: Remove the clamps; simultaneously transfer all the I-beams and clamps at the bottom of the beam to land, then separate the I-beams and clamps on land, and move all the above materials to the next beam and repeat the above construction steps.

[0006] Furthermore, in step S1, a crawler crane is used to lift the clamp and install it on the pile foundation; a crawler crane is also used to lift the I-beam and install it on the clamp.

[0007] Furthermore, step S1 includes the following steps: Step S11: Install the clamp on the pile foundation; place the two semi-circular clamp plates on both sides of the pile foundation, with steel plates used for horizontal reinforcement at the straight ends of the clamp plates. Connecting bolts are used at the connection points of the clamp plates to secure them together and make them parallel to the axis of the pile foundation frame. A bracket is welded to the middle position of the outer side of the center of the semi-circle of the clamp plate. The bracket is set perpendicular to the axis of the frame. If the bracket is used on the inclined pile, the welding angle can be finely adjusted according to the actual slope of the inclined pile. After installation, the top of the extended steel bracket maintains the same horizontal contact surface with the straight piles and inclined piles in the whole crossbeam, thereby effectively controlling the elevation at this point. This greatly improves the overall stability and quality assurance of the overall force system during the bottom formwork installation process. At the same time, the force is uniform when the upper load is applied, and the safety and reliability are greatly guaranteed. Step S12: Place the I-beam on the clamp; the I-beam is placed on the brackets on both sides of the clamp, the brackets are perpendicular to the axis of the frame, and the brackets are provided with reserved holes. Use iron wire to pass through the reserved holes of the steel clamp and fix it to the I-beam.

[0008] Step S13: Lay the timber on top of the I-beams and tie it to the I-beams with wire; the timber is perpendicular to the axis of the frame. The length of the timber is selected based on the width of the bottom of the crossbeam and the construction passage, while the thickness, width, and quantity are selected based on the stress calculation requirements. Using timber as a vertical support, as part of the bottom formwork load-bearing system, mainly reduces the weight of the bottom formwork load-bearing system while providing the necessary support and stability. Furthermore, every two piles form a horizontal row, and an I-beam is placed on each side of each horizontal row of piles. The I-beams are installed sequentially from the first horizontal row to the last horizontal row. The last horizontal row is arranged as horizontal row B, and the remaining horizontal rows are arranged as horizontal row A.

[0009] Furthermore, the I-beams in the first horizontal row are arranged in a figure-eight shape from the first horizontal row to the last horizontal row, with one end facing the starting point of the arrangement being the smaller angle end and the other end being the larger angle end. The I-beams on the smaller end side are arranged symmetrically close to the outer edge of the pile foundation. The I-beams in the second horizontal row are arranged symmetrically and parallel to the outer edge of the pile foundation, with one end facing the starting point of the arrangement abutting against the inner side of the larger angle end of the first horizontal row.

[0010] Furthermore, the I-beam... The starting section should be set from the small end of the angle of the first horizontal row, and the outer side of the small end of the second horizontal row should be spliced ​​with the inner side of the large end of the angle of the first horizontal row for at least one pile position. A bolt device should be installed at the splice, and the four I-beams should be pulled into a whole connection. Then, iron wire should be passed through the reserved hole in the middle of the bracket tail and tied to the I-beam. The advantages of using I-beams are that, except for the last span, all other I-beams are angled according to the first horizontal row, and the last span's second horizontal row is parallel to the pile foundation. This combination ensures that the clamped pile foundations are firmly held on both sides of the I-beam and are aligned in a straight line, preventing pile foundation displacement over time. It maximizes the use of existing short I-beam materials, saving construction costs. Simultaneously, it utilizes the length of existing materials to ensure overall stress balance and meet the requirements of the superstructure load. Wheeled cranes can be used for installation, avoiding complete blockage of the steel trestle bridge passage and preventing idle work due to obstructed access. It eliminates the need for large-tonnage crawler cranes, significantly reducing machinery rental costs and avoiding additional expenses for idle work. It also allows for uninterrupted construction of overlapping work processes, effectively shortening construction time and contributing to a shorter project duration. The dimensions and quantity must be selected based on the pile foundation diameter and the superstructure load, after calculation.

[0011] Furthermore, a bracket is provided on the outer side of the hoop plate. The bracket is perpendicular to the axis of the frame. A reserved hole is provided on the bracket, and the reserved hole is located at the end of the bracket away from the pile foundation.

[0012] Furthermore, the bracket is made of square steel, with one end welded to the center of the outer side of the hoop plate.

[0013] Furthermore, step S12 also includes: installing a bolt device, wherein the middle part of the I-beam is provided with an installation hole, and a bolt device is installed in the installation hole to tie the I-beams on both sides of the clamp together, and the bolt device is set perpendicular to the axis of the frame.

[0014] Furthermore, the mounting holes are drilled based on data such as the length of the existing I-beams and the positions of the driven piles. The bolt holes are designed in a long strip shape, allowing for fine-tuning of the bolt positions during installation, thus facilitating installation. The number and location of the holes are selected based on the stress calculation requirements and the diameter of the bolts.

[0015] Furthermore, the connecting bolt device further includes: a screw, a washer ring, and a nut. The screw has threads at both ends, and the threads are machined according to the length of the I-beam being pulled. The washer ring is divided into a standard washer ring and a non-standard washer ring. The non-standard washer ring is machined according to the angle of the position on the I-beam being installed. The screw has an washer ring and a nut arranged sequentially from the inside to the outside at both ends.

[0016] Furthermore, in step S2, the bottom formwork is made of composite plastic sheeting, installed on top of the timber, with the bottom of the crossbeam fully covered by the bottom formwork. Using composite plastic sheeting as the bottom formwork is convenient to cut, lightweight, stronger than bamboo plywood, and less prone to deformation, while also being water-resistant and corrosion-resistant.

[0017] Furthermore, step S3 includes the following steps: Step S31: After the construction of the water-based crossbeam is completed, pass the upper chain of the chain-type manual tensioner through the lifting device and lock it into the outward stirrup at the top of the water-based crossbeam. Step S32: Install a double-ear flat lifting strap at the lower part of the chain-type manual tensioner. The double-ear flat lifting strap is used to lift the I-beam. Step S33: Install a protective device at the top of the water beam and at the contact point of the chain-type manual tensioner.

[0018] Furthermore, the lifting device is located at the top of the horizontal beam on the water. The lifting device is U-shaped with a notch facing the top surface of the horizontal beam on the water. The upper chain of the manual tensioner is threaded through the notch.

[0019] Furthermore, the outward-extending stirrups and the stirrups of the water-based crossbeam are integrated and used for the construction of the upper structure of the water-based crossbeam.

[0020] Furthermore, the lifting device includes a first lifting clip and a second lifting clip, which are horizontally arranged and fixed together. The first lifting clip is made of wood, and the second lifting clip is made of steel. The combination of wood and steel significantly improves its strength. The groove at the bottom of the device prevents the concrete at the top of the horizontal beam from contacting the upper end of the chain-type manual tensioner during lifting, effectively protecting the concrete from damage.

[0021] Furthermore, the double-ear flat lifting sling includes two lifting points, which are hooked in the chain hook at the bottom of the chain-type manual tensioner.

[0022] Furthermore, the protective device includes two protective bases and a flexible non-woven fabric. The two ends of the flexible non-woven fabric are fixed to the protective bases with steel nails. The bottom surface of one protective base is located on the side of the contact angle between the upper chain of the chain-type manual tensioner and the water beam, and the bottom surface of the other protective base is located on the top surface of the contact angle.

[0023] Compared with existing technologies, the advantages and effects of this application are as follows: 1. This application utilizes a chain-type manual tensioner installed on the crossbeam to bear the weight of the bottom formwork system immediately after the crossbeam is poured, and removes the clamp connecting bolts. This transforms the high-risk demolition work that originally had to be carried out on the ship into a relatively safe operation on the top of the crossbeam or on the trestle, significantly reducing the risk of personnel falling into the water and ships colliding with the pile foundation.

[0024] 2. This application involves transferring the I-beams and clamps to the land for separation, reducing the time that the crane or crawler crane occupies, allowing it to be put into other processes earlier, thereby saving high equipment rental costs and avoiding idle time for other types of work caused by equipment occupying the road for a long time.

[0025] 3. The overall hoisting of the I-beams and clamps in this application avoids the possibility of components falling or colliding when separated directly on water, effectively protecting the integrity and appearance quality of the poured beam concrete.

[0026] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the preferred embodiments of this application are described in detail below with reference to the accompanying drawings.

[0027] The above and other objects, advantages and features of this application will become more apparent to those skilled in the art from the following detailed description of specific embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0029] in: Figure 1 A flowchart illustrating a method for installing and dismantling the bottom formwork of a crossbeam on water; Figure 2 This is a schematic diagram illustrating the installation and dismantling process of a bottom formwork for a horizontal beam on water. Figure 3 A top view of the installation and dismantling process of a bottom formwork for a horizontal beam on water; Figure 4 An enlarged schematic diagram of the pile foundation during the installation and dismantling process of the bottom formwork for a horizontal beam on water. Figure 5 is a schematic diagram of the clamp structure for installing and removing the bottom formwork of a crossbeam on water. Figure 5A A top view of the clamp structure for installing and removing the bottom formwork of a crossbeam on water; Figure 5B A front view of the clamp structure for installing and dismantling the bottom formwork of a crossbeam on water; Figure 5C This is a side view of the clamp structure; Figure 6 This is a side view of an I-beam structure. Figure 7 A schematic diagram of the structure of a double-ear flat lifting sling; Figure 8 A schematic diagram of a chain-type manual tensioner; Figure 9 is a schematic diagram of the protective device; Figure 9A This is a bottom view of the protective device; Figure 9B This is a front view of the protective device; Figure 10 is a structural schematic diagram of the lifting device fastening mechanism; Figure 10A This is a side view of the lifting device's structure. Figure 10B This is a front view of the lifting device's structure. Figure 11 This is a structural disassembly diagram of the bolt assembly.

[0030] Explanation of reference numerals in the attached drawings: 1-Pile foundation; 2-Clamping hoop; 201-Clamping plate; 202-Corner; 203-Reserved hole; 204-Connecting bolt; 3-I-beam; 301-Mounting hole; 4-Timber; 5-Bottom formwork; 6-Overwater crossbeam; 7-Extended stirrup; 8-Double-ear flat lifting sling; 801-Lifting point; 9-Chain manual tensioner; 10-Protective device; 1001-Protective base; 1002-Flexible non-woven fabric; 1003-Steel nail; 11-Lifting tool buckle device; 1101-First lifting tool buckle; 1102-Second lifting tool buckle; 12-Bolt device; 1201-Threaded rod; 1202-Iron washer; 1203-Nut. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. In the following description, specific details such as specific configurations and components are provided merely to help fully understand the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. In addition, for clarity and brevity, descriptions of known functions and structures are omitted in the embodiments.

[0032] It should be understood that the phrase "an embodiment" or "this embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "an embodiment" or "this embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0033] Furthermore, reference numerals and / or letters may be repeated in different examples within this application. Such repetition is for the purpose of simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0034] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" describes another type of relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it have an "or" relationship.

[0035] In this article, the term "at least one" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, "at least one of A and B" can mean: A exists alone, A and B exist simultaneously, or B exists alone.

[0036] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion.

[0037] Example 1 This embodiment describes a method for installing and dismantling the bottom formwork of a crossbeam on water.

[0038] Please refer to Figure 1-4 As shown, Figure 1 A flowchart illustrating a method for installing and dismantling the bottom formwork of a crossbeam on water; Figure 2 This is a schematic diagram illustrating the installation and dismantling process of a bottom formwork for a horizontal beam on water. Figure 3 A top view of the installation and dismantling process of a bottom formwork for a horizontal beam on water; Figure 4 An enlarged schematic diagram of the pile foundation during the installation and dismantling process of the bottom formwork for a horizontal beam on water. A method for installing and dismantling the bottom formwork of a crossbeam on water includes the following steps: Step S1: Install I-beams 3; After the construction of the pile foundation 1 on the water forms a frame, install the clamps 2 on the pile foundation 1; Place the I-beams 3 in sections on both sides of the clamps 2 and tie them together; Lay the timber 4 on top of the I-beams 3; Step S2: Lay the bottom formwork 5 and pour the water beam 6; Lay the bottom formwork 5 on top of the timber 4, and pour concrete in the bottom formwork 5 on site to complete the construction of the water beam 6. Step S3: Install the chain-type manual tensioner 9; Install the chain-type manual tensioner 9 on the water beam 6, and tighten the I-beam 3 using the chain-type manual tensioner 9; Step S4: Remove the bottom formwork 5; remove the connecting bolts 204 of the bottom clamp 2 of the water beam 6 so that the clamp 2 is vertically hung below the I-beam 3; lower the chain-type manual tensioner 9 so that the I-beam 3 falls down, and then remove the timber 4 and the bottom formwork 5 respectively. Step S5: Remove clamps 2; transfer all I-beams 3 and clamps 2 at the bottom of the water beam 6 to land at the same time, and then separate the I-beams 3 and clamps 2 on land.

[0039] The technical advantages of this embodiment are as follows: By placing the I-beams on the brackets of the clamps and fixing them with wire through the pre-drilled holes, the stability of the I-beams is ensured. In particular, by using bolts to tie the I-beams on both sides of the clamps together, an integral load-bearing frame is formed, which can effectively clamp the pile foundation and prevent it from shifting during construction. This significantly improves the overall rigidity and stability of the bottom formwork support system, and is especially suitable for scaffolding structures with both straight and inclined piles.

[0040] Example 2 Based on Embodiment 1, this embodiment discloses a further design of step S1 of the method for installing and dismantling the bottom formwork of a crossbeam on water.

[0041] Please refer to Figures 5-6 and 11. Figure 5 is a schematic diagram of the clamp structure for installing and removing the bottom formwork of a crossbeam on water. Figure 6 This is a side view of an I-beam structure. Figure 11 This is a structural disassembly diagram of the bolt assembly.

[0042] Furthermore, in step S1, a crawler crane is used to lift the clamp 2 and install it on the pile foundation 1; a crawler crane is used to lift the I-beam 3 and install it on the clamp 2.

[0043] Furthermore, step S1 includes the following steps: Step S11: Install the clamp 2 on the pile foundation 1; set the two semi-circular clamp plates 201 of the clamp 2 on both sides of the pile foundation 1, and set the connecting bolts 204 at the connection of the clamp plates 201 to secure the clamp plates 201 together; Step S12: Place the I-beam 3 on the clamp 2; the I-beam 3 is placed on the brackets 202 on both sides of the clamp 2. The brackets 202 are perpendicular to the axis of the frame. The brackets 202 are provided with reserved holes 203. Iron wire is passed through the reserved holes 203 of the steel clamp 2 and fixed to the I-beam 3.

[0044] Step S13: Lay the timber 4 on top of the I-beam 3; the timber 4 is set perpendicular to the axis of the frame.

[0045] Furthermore, a bracket 202 is provided on the outer side of the hoop plate 201. The bracket 202 is perpendicular to the axis of the frame. A reserved hole 203 is provided on the bracket 202. The reserved hole 203 is located at the end of the bracket 202 away from the pile foundation 1.

[0046] Furthermore, the bracket 202 is made of square steel, with one end welded to the center of the hoop plate 201 at the middle position on the outer side.

[0047] Furthermore, every two piles form a horizontal row, and an I-beam 3 is placed on each side of each pile 1 in the horizontal row. The I-beams 3 are installed sequentially from the first horizontal row to the last horizontal row. The last horizontal row is arranged as horizontal row B, and the remaining horizontal rows are arranged as horizontal row A.

[0048] Furthermore, the I-beams 3 in the first horizontal row are arranged in a figure-eight shape from the first horizontal row to the last horizontal row, with one end facing the starting point of the arrangement being the smaller angle end and the other end being the larger angle end. The I-beams 3 on the smaller end side are symmetrically arranged close to the outer edge of the pile foundation 1. The I-beams 3 in the second horizontal row are symmetrically arranged parallel to the outer edge of the pile foundation 1, with one end facing the starting point of the arrangement abutting against the inner side of the larger angle end of the first horizontal row.

[0049] Furthermore, step S12 also includes: installing bolt device 12, wherein the middle part of the I-beam 3 is provided with mounting hole 301, and bolt device 12 is installed in mounting hole 301 to tie the I-beams 3 on both sides of clamp 2 together, and the bolt device 12 is set perpendicular to the axis of the frame.

[0050] Furthermore, the starting section should be set from the small end of the angle of the first horizontal row, and the outer side of the small end of the second horizontal row should be spliced ​​with the inner side of the large end of the angle of the first horizontal row for at least one pile position. The bolt device 12 is installed at the splice, and the four I-beams 3 are pulled into a whole connection. Then, the iron wire is passed through the reserved hole 203 in the middle of the tail of the corbel 202 and tied to the I-beam 3.

[0051] Furthermore, the bolting device 12 includes: a screw 1201, a washer ring 1202, and a nut 1203. The screw 1201 has threads at both ends, and the threads are machined according to the length of the I-beam 3 being pulled. The washer ring 1202 is divided into a standard washer ring 1212 and a non-standard washer ring 1222. The non-standard washer ring 1222 is machined according to the angle of the position where it is installed on the I-beam 3. The washer ring 1202 and the nut 1203 are arranged sequentially from the inside to the outside at both ends of the screw 1201.

[0052] The technical advantages of this embodiment are: compared to directly using the lugs of the clamp for load-bearing, the corbel structure has a more reasonable stress distribution, avoiding local stress concentration and making the clamp structure lighter. At the same time, the pre-drilled holes on the corbel facilitate quick binding and fixing, while the bolt device design enables rapid connection and disassembly between the I-beams, improving construction efficiency.

[0053] Example 3 Based on Example 1, this example discloses a further design of step S3 in the method for installing and dismantling the bottom formwork of a crossbeam on water.

[0054] Please refer to Figure 7-1 As shown in 0, Figure 7 A schematic diagram of the structure of a double-ear flat lifting sling; Figure 8 Figure 9 is a schematic diagram of the structure of the chain manual tensioner; Figure 10 is a schematic diagram of the structure of the protective device; Figure 11 is a schematic diagram of the structure of the lifting device. Furthermore, step S3 includes the following steps: Step S31: After the construction of the water beam 6 is completed, the upper chain of the chain-type manual tensioner 9 is passed through the lifting device 11 and locked in the outward stirrup 7 at the top of the water beam 6. Step S32: A double-ear flat lifting strap 8 is installed at the lower part of the chain-type manual tensioner 9. The double-ear flat lifting strap 8 is used to lift the I-beam 3. Step S33: Install a protective device 10 at the top of the water beam 6 and the contact position of the chain-type manual tensioner 9.

[0055] Furthermore, the lifting device 11 is installed on the top of the water beam 6. The lifting device 11 is U-shaped and has a notch. The notch faces the top surface of the water beam 6, and the upper chain of the ring chain manual tensioner 9 is inserted into the notch.

[0056] Furthermore, the outward-extending stirrups 7 and the stirrups of the water-surface beam 6 are integral and used for the construction of the upper structure of the water-surface beam 6.

[0057] Furthermore, the lifting device 11 includes a first lifting device buckle 1101 and a second lifting device buckle 1102, which are horizontally arranged and fixed together. The first lifting device buckle 1101 is made of wood, and the second lifting device buckle 1102 is made of steel.

[0058] Furthermore, the double-ear flat lifting sling 8 includes two lifting points 801, which are hooked in the chain hook at the lower part of the chain-type manual tensioner 9.

[0059] Furthermore, the protective device 10 includes two protective bases and a flexible non-woven fabric 1002. The two ends of the flexible non-woven fabric 1002 are fixed to the protective bases with steel nails 1003. The bottom surface of one protective base is located on the side of the contact angle between the upper chain of the chain-type manual tensioner 9 and the water beam 6, and the bottom surface of the other protective base is located on the top surface of the contact angle.

[0060] The technical advantages of this embodiment are as follows: Utilizing the outward-extending stirrups of the crossbeam itself as lifting points, combined with the U-shaped lifting hook device, provides a secure and non-slipping attachment point for the chain-type manual tensioner, ensuring verticality and stability of the force during lowering. The design of the double-ear flat lifting straps enables flexible and stable lifting of the I-beam. A protective device containing flexible non-woven fabric is installed at the contact angle between the crossbeam and the chain of the chain-type manual tensioner, effectively preventing wear and damage to the concrete edges of the crossbeam by the tensioner chain during stress or adjustment, reflecting a refined construction protection concept.

[0061] The above description is merely a preferred embodiment of the present invention and does not limit the scope of protection of the present invention. Various modifications and variations are possible with respect to the present invention. Any changes, modifications, substitutions, integrations, and parameter alterations to these embodiments within the spirit and principles of the present invention fall within the scope of protection of the claims of the present invention.

Claims

1. A method for installing and dismantling the bottom formwork of a horizontal beam on water, characterized in that, Includes the following steps: Step S1: Install I-beams (3); After the pile foundation (1) on the water is constructed and a frame is formed, install the clamps (2) on the pile foundation (1); place the I-beams (3) in sections on both sides of the clamps (2) and tie them together with the clamps (2); lay the timber (4) on top of the I-beams (3); Step S2: Lay the bottom formwork (5) and pour the water beam (6); Lay the bottom formwork (5) on top of the timber (4), and pour concrete in the bottom formwork (5) on site to complete the construction of the water beam (6); Step S3: Install the chain-type manual tensioner (9); Install the chain-type manual tensioner (9) on the water beam (6) and tighten the I-beam (3) using the chain-type manual tensioner (9); Step S4: Remove the bottom formwork (5); remove the connecting bolts (204) of the bottom clamp (2) of the water beam (6) so that the clamp (2) is vertically hung below the I-beam (3); lower the chain-type manual tensioner (9) so that the I-beam (3) falls down, and then remove the timber (4) and the bottom formwork (5) respectively. Step S5: Remove the clamps (2); transfer all the I-beams (3) and clamps (2) at the bottom of the water beam (6) to land at the same time, and then separate the I-beams (3) and clamps (2) on land.

2. The method for installing and dismantling the bottom formwork of the underwater beam according to claim 1, characterized in that, Step S1 includes the following steps: Step S11: Install the clamp (2) on the pile foundation (1); Set the two semi-circular clamp plates (201) of the clamp (2) on both sides of the pile foundation (1). The straight ends of the clamp plates (201) are horizontally reinforced with steel plates. The straight ends of the clamp plates (201) are the connection points. Connecting bolts (204) are set at the connection points to secure the clamp plates (201) together. A bracket (202) is welded to the middle position of the outer side of the center of the semicircle of the clamp plate (201). Step S12: Place the I-beam (3) on the clamp (2); the I-beam (3) is placed on the brackets (202) on both sides of the clamp (2). The brackets (202) are perpendicular to the axis of the frame. The brackets (202) are provided with reserved holes (203). Use iron wire to pass through the reserved holes (203) of the steel clamp (2) and fix it to the I-beam (3). Step S13: Lay the timber (4) on top of the I-beam (3); the timber (4) and the frame axis are set perpendicularly.

3. The method for installing and dismantling the bottom formwork of the underwater beam according to claim 2, characterized in that, A corbel (202) is provided on the outside of the hoop plate (201). The corbel (202) is perpendicular to the axis of the frame. A reserved hole (203) is provided on the corbel (202). The reserved hole (203) is located at the end of the corbel (202) away from the pile foundation (1).

4. The method for installing and dismantling the bottom formwork of the underwater beam according to claim 3, characterized in that, Step S12 further includes: installing a bolt device (12), wherein the middle part of the I-beam (3) is provided with a mounting hole (301), and the bolt device (12) is installed in the mounting hole (301) to tie the I-beams (3) on both sides of the clamp (2) together. The bolt device (12) is set perpendicular to the axis of the frame.

5. The method for installing and dismantling the bottom formwork of the underwater beam according to claim 4, characterized in that, The bolt device (12) includes: a screw (1201), a washer ring (1202) and a nut (1203). The two ends of the screw (1201) are threaded, and the two ends of the screw (1201) are provided with washer ring (1202) and nut (1203) from the inside to the outside.

6. The method for installing and dismantling the bottom formwork of the underwater beam according to claim 1, characterized in that, Step S3 includes the following steps: Step S31: After the construction of the water beam (6) is completed, the upper chain of the chain-type manual tensioner (9) is passed through the lifting device (11) and locked in the outward stirrup (7) at the top of the water beam (6); Step S32: Set a double-ear flat lifting strap (8) at the lower part of the chain manual tensioner (9), the double-ear flat lifting strap (8) is used to lift the I-beam (3); Step S33: Install a protective device (10) at the top of the water beam (6) and the contact position of the chain manual tensioner (9).

7. The method for installing and dismantling the bottom formwork of the underwater beam according to claim 6, characterized in that, The lifting device (11) is set on the top of the water beam (6). The lifting device (11) is U-shaped and has a notch. The notch faces the top surface of the water beam (6). The upper chain of the ring chain manual tensioner (9) is inserted into the notch.

8. The method for installing and dismantling the bottom formwork of the underwater beam according to claim 7, characterized in that, The outward-extending stirrups (7) and the stirrups of the water-surface beam (6) are an integral whole and are used for the construction of the upper structure of the water-surface beam (6).

9. The method for installing and dismantling the bottom formwork of the underwater beam according to claim 1, characterized in that, The double-ear flat lifting sling (8) includes two lifting points (801), which are hooked in the chain hook at the bottom of the ring chain manual tensioner (9).

10. The method for installing and dismantling the bottom formwork of the underwater beam according to claim 6, characterized in that, The protective device (10) includes two protective bases and a flexible nonwoven fabric (1002). The two ends of the flexible nonwoven fabric (1002) are fixed to the protective bases with steel nails (1003). The bottom surface of one protective base is set on the side of the contact angle between the upper chain of the chain-type manual tensioner (9) and the water beam (6), and the bottom surface of the other protective base is set on the top surface of the contact angle.

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