Prefabricated concrete pontoon based on staggered prestressed tensioning technology and manufacturing method

Abstract

The present invention discloses an assembled concrete pontoon based on staggered prestressed tensioning technology, comprising: N concrete units, the N concrete units are connected to each other in the circumferential direction; M prestressed steel bundles, the M prestressed steel bundles are evenly arranged in the N concrete units in the height direction, and any one of the prestressed steel bundles is arranged inside n continuous concrete units among the N concrete units, and is used to perform circumferential tensioning on the n continuous concrete units, each concrete unit and the adjacent n-1 continuous concrete units form a concrete unit group, the N concrete units are divided into a plurality of concrete unit groups, and the plurality of concrete unit groups are all circumferentially tensioned by the prestressed steel bundles to form a concrete pontoon shell, wherein n, N and M are all natural numbers, and n≤N. The present invention discloses an assembled concrete pontoon structure connection and manufacturing method based on multi-stage multi-point staggered prestressed tensioning technology.

Description

Technical Field

[0001] The present invention belongs to the technical field of civil and marine engineering structures, and in particular to an assembled concrete buoy structure connection and a manufacturing method thereof based on a multi-level multi-point staggered prestressed tensioning technology. Background Art

[0002] Prefabricated structures are a powerful way to achieve the industrialization of civil engineering. Prefabricated structures have the advantages of high component quality, low labor costs and short construction period. Prefabricated structures often use steel structures and concrete structural systems. Concrete structure technology is mature, and the nodes connecting adjacent modules are often connected by post-cast concrete wet connections. Wet connections are achieved through steel lap joints and a small amount of cast-in-place concrete, while dry connections do not use cast-in-place concrete. Most of them are connected by bolts, welding, etc. The concrete pontoon structure is a new structural system for marine engineering. Its most ideal production process is to adopt a prefabricated construction method.

[0003] At present, buoy structures are often used in offshore power generation devices or offshore activity platforms, which are susceptible to fatigue damage caused by wave motion or corrosion damage in the marine environment. Offshore floating platforms are conventionally made of pure steel structures, which have the disadvantages of easy corrosion, high construction process requirements and difficult later maintenance. The harsh marine environment places high demands on the mechanical properties and anti-corrosion properties of the steel of the device, which directly increases the cost of the project. On the other hand, for floating wind turbines that are pure steel structure systems, the designed service life is usually 20 years. The reinforced concrete floating platforms currently designed and used abroad have a designed service life of more than 50 years, which fully demonstrates the high durability of reinforced concrete materials. The wet connection of concrete buoy structures requires a lot of wet work on site and there are problems with steel bar collisions in the node area, and the installation efficiency is still not high enough. If a prestressed assembly frame with dry node connection is used, the efficiency of factory production and on-site installation of precast concrete can be better utilized, and the post-tensioned prestressed technology connection can provide good structural recovery performance, and there is a large space for innovation in self-recovery design, which is convenient for the rapid repair of marine engineering structures after disasters.

[0004] In view of this, it is urgent to propose an assembled concrete pontoon and a manufacturing method based on staggered prestressed tensioning technology, which has the advantages of fast assembly, standardized construction, economical and high durability, and excellent waterproof and anti-seepage performance. Summary of the invention

[0005] The purpose of the present invention is to provide an assembled concrete pontoon based on staggered prestressed tensioning technology and a manufacturing method thereof.

[0006] In order to achieve the above object, the technical solution provided by the present invention is:

[0007] In a first aspect, a prefabricated concrete pontoon based on staggered prestressed tensioning technology is provided, comprising: a prefabricated concrete pontoon based on staggered prestressed tensioning technology, comprising:

[0008] N concrete units, wherein the N concrete units are connected to each other in a circumferential direction;

[0009] M prestressed steel strands are evenly spaced in the height direction and arranged in rows in the N concrete units, and any one of the prestressed steel strands is arranged inside n consecutive concrete units among the N concrete units and is used to circumferentially tension the n consecutive concrete units, each of the concrete units and the adjacent n-1 consecutive concrete units form a concrete unit group, the N concrete units are divided into a plurality of concrete unit groups, and the plurality of concrete unit groups are circumferentially tensioned by the prestressed steel strands to form a concrete pontoon shell, wherein n, N and M are all natural numbers, and n≤N.

[0010] M layers of corrugated pipe holes are evenly arranged in rows and circumferentially arranged throughout the interior and both end surfaces of each concrete unit in the height direction, and the M prestressed steel strands are correspondingly passed through the M layers of corrugated pipe holes.

[0011] A water stop groove is provided at the relative connection of each concrete unit, and a water stop material is arranged at the water stop groove.

[0012] When N=6, n=4, the concrete pontoon shell is a hexagonal concrete pontoon shell formed by connecting 6 concrete units, the 6 concrete units are respectively a first concrete unit, a second concrete unit, a third concrete unit, a fourth concrete unit, a fifth concrete unit, and a sixth concrete unit, and the M prestressed steel strands are evenly spaced in a height direction and arranged inside any consecutive 4 of the 6 concrete units, and are used to perform circumferential tensioning on any consecutive 4 concrete units.

[0013] The odd-numbered steel strands in the M prestressed steel strands are arranged inside the first concrete unit, the second concrete unit, the third concrete unit and the fourth concrete unit, and the first concrete unit, the second concrete unit, the third concrete unit and the fourth concrete unit are circumferentially tensioned;

[0014] An even number of layers of the M prestressed steel strands are arranged inside the fourth concrete unit, the fifth concrete unit, the sixth concrete unit and the first concrete unit, and the fourth concrete unit, the fifth concrete unit, the sixth concrete unit and the first concrete unit are circumferentially tensioned.

[0015] At the connection point between two adjacent concrete units, the interface of the corrugated pipe hole is provided with a blunt chamfered structure.

[0016] Both ends of the prestressed steel bundle are also connected with anchor heads, and the end of the anchor head opposite to the corrugated pipe hole is arranged into a truncated cone structure and is anchored to the outside of the corrugated pipe hole through the truncated cone structure.

[0017] A corrugated pipe is sleeved in the corrugated pipe hole, and the prestressed steel bundle is sleeved in the corrugated pipe.

[0018] It also includes a pier head structure, which is L-shaped, with one side arranged at the inner side of the concrete unit and the other side arranged at the end surface of the concrete unit, and allows the corrugated pipe hole to pass through.

[0019] In a second aspect, the present invention provides a method for manufacturing an assembled concrete pontoon based on staggered prestressing tensioning technology, comprising the following steps:

[0020] Step 1, prefabricate N concrete units in a factory, and evenly open M layers of corrugated pipe holes arranged circumferentially through the interior and both end surfaces of the concrete units in the height direction, and the inner wall of the concrete unit is also provided with a pier head structure at the connection between two adjacent concrete units;

[0021] Step 2, providing M prestressed steel tendons;

[0022] Step 3, arrange M prestressed steel strands in N concrete units at uniform intervals in the height direction, arrange any one of the prestressed steel strands inside n consecutive concrete units among the N concrete units, and circumferentially tension the n consecutive concrete units by the prestressed steel strands; wherein each concrete unit and the adjacent n-1 consecutive concrete units form a concrete unit group, the N concrete units are divided into multiple concrete unit groups, and the multiple concrete unit groups are all circumferentially tensioned by the prestressed steel strands to form a concrete pontoon shell, wherein n, N and M are all natural numbers, and n≤N.

[0023] Beneficial effects of the present invention:

[0024] 1. The present invention connects the nodes between the panels by alternately connecting the prestressed steel strands along the height and the circumferential direction, forming a continuous and stable spatial load-bearing system, which greatly improves the integrity and safety of the assembled structure;

[0025] 2. The prestressed splicing technology used in the present invention is reliable in quality, high in connection strength, and convenient in construction, and can realize full dry operation on site. In addition, the post-tensioning non-bonded prestressed assembly method is adopted, and the damaged unit can be quickly replaced after the plate is damaged. The splicing method is simple, the connection method is reliable, and the centering adjustment is controllable, which solves the problem that the cast-in-place nodes cannot be adjusted;

[0026] 3. All structural load-bearing components are prefabricated, and the concrete slabs are completed in the factory in advance, which can greatly save manpower and material resources, reduce on-site construction work, and significantly improve construction efficiency. Prestressed steel strands or corrugated pipe holes can be reserved in the slabs according to actual construction needs.

[0027] The present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, which are used to illustrate embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Shown is a schematic diagram of an embodiment of a prefabricated concrete pontoon based on staggered prestressing tensioning technology.

[0029] Figure 2 As shown Figure 1 Schematic diagram of the vertical connection of prefabricated concrete pontoons based on staggered prestressing tensioning technology is shown.

[0030] Figure 3 As shown Figure 1 A schematic diagram of the circumference of a prefabricated concrete pontoon based on staggered prestressing tensioning technology is shown.

[0031] Figure 4 As shown Figure 1 The schematic diagram of the prestressed connection of the prefabricated concrete pontoon node based on the staggered prestressing tensioning technology is shown.

[0032] Figure 5 Shown is a schematic structural diagram of the anchor head.

[0033] Figure 6 Shown is a schematic diagram of a concrete unit with a pier head structure.

[0034] Figure 7 Shown Figure 6 Another angle view of. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0037] Hereinafter, the terms "including", "having" and their cognates used in various embodiments of the present invention are intended only to indicate specific features, numbers, steps, operations, elements, components or combinations of the foregoing items, and should not be understood as first excluding the existence of one or more other features, numbers, steps, operations, elements, components or combinations of the foregoing items or adding the possibility of one or more features, numbers, steps, operations, elements, components or combinations of the foregoing items.

[0038] In addition, when the present invention involves the terms "first", "second", "third", etc., they are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0039] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as those generally understood by those skilled in the art to which the various embodiments of the present invention belong. The terms (such as those defined in generally used dictionaries) will be interpreted as having the same meanings as the contextual meanings in the relevant technical field and will not be interpreted as having idealized meanings or overly formal meanings unless clearly defined in the various embodiments of the present invention.

[0040] The embodiment of the present invention provides an assembled concrete pontoon 100 based on staggered prestressing tensioning technology, comprising:

[0041] N concrete units, wherein the N concrete units are connected to each other in a circumferential direction;

[0042] In one embodiment, the concrete unit in the concrete pontoon 100 is a concrete unit of a plate-like structure. For easier description, the embodiments of the present invention are all described as concrete units of a plate-like structure. Each of the concrete units has an end face connected to other adjacent concrete units. When two adjacent concrete units are connected, the end faces can be tightly connected together.

[0043] In one embodiment, the concrete pontoon 100 includes six concrete units 1a, 1b, 1c, 1d, 1e, and 1f, and the six concrete units are connected to each other in the circumferential direction to achieve a sealed connection;

[0044] In the above embodiment, the concrete pontoon 100 includes five prestressed steel strands 2a, 2b, 2c, 2d, and 2e. The five prestressed steel strands are evenly spaced in the height direction and arranged in rows in the six concrete units, and the six concrete units form a concrete pontoon shell.

[0045] It should be noted that the starting end and the terminal end of any of the prestressed steel strands are arranged in the middle of the inner wall of the concrete unit, that is, the starting end and the terminal end of the prestressed steel strand are anchored in the middle of the inner wall of the concrete unit, for example Figure 1 As shown, the starting end of the prestressed steel bundle 2a is anchored in the middle of the inner wall of the concrete unit 1e, and the terminal end is anchored in the middle of the interior of the concrete unit 1b; as another example, the starting end of the prestressed steel bundle 2b is anchored in the middle of the inner wall of the concrete unit 1b, and the terminal end is anchored in the middle of the interior of the concrete unit 1e; it should also be noted that in the above embodiments, the structures of the starting end and the terminal end of the prestressed steel bundle are the same, that is, the prestressed steel bundle 2a can be anchored in a clockwise direction or in a counterclockwise direction. In addition, the structure of the anchor head will be introduced below.

[0046] Five layers of circumferentially arranged corrugated pipe holes are evenly spaced in the height direction throughout the interior and both end surfaces of each concrete unit, and the five prestressed steel strands 2a, 2b, 2c, 2d, and 2e are correspondingly passed through the five layers of corrugated pipe holes.

[0047] Any one of the prestressed steel strands is arranged inside four consecutive concrete units among the six concrete units, and is used to perform circumferential tensioning on the four consecutive concrete units.

[0048] Specifically, taking the prestressed steel bundle 2a as an example, the prestressed steel bundle 2a is arranged at the topmost layer of the concrete pontoon 100 from the top to the bottom, and is arranged inside the concrete units 1e, 1f, 1a, and 1b. The starting end of the prestressed steel bundle 2a is arranged at the inner middle part of the concrete unit 1e, and the terminal end is arranged inside the inner side of the concrete unit 1b.

[0049] Taking the prestressed steel bundle 2b as an example, the prestressed steel bundle 2b is arranged on the second layer from the top to the bottom of the concrete pontoon 100, and is arranged inside the concrete units 1b, 1c, 1d, and 1e. The starting end of the prestressed steel bundle 2b is arranged at the inner middle part of the concrete unit 1b, and the terminal end is arranged inside the inner side of the concrete unit 1e.

[0050] According to the above setting rules, the five prestressed steel strands 2a, 2b, 2c, 2d, and 2e are arranged from top to bottom and correspondingly penetrate the holes of the five layers of corrugated pipes, and finally the six concrete units 1a, 1b, 1c, 1d, 1e, and 1f are connected to each other in the circumferential direction, so that the six concrete units 1a, 1b, 1c, 1d, 1e, and 1f have overall synergy, and the six concrete units form a concrete pontoon shell.

[0051] Each of the concrete units and the adjacent n-1 continuous concrete units form a concrete unit group, and the N concrete units are divided into a plurality of concrete unit groups, which are now described as follows:

[0052] refer to Figure 1 , 3 In one embodiment, every four concrete units form a concrete unit group, and the concrete units 1a, 1b, 1c, 1d, 1e, and 1f can form multiple concrete unit groups. For example, the concrete units 1a, 1b, 1c, and 1d form a concrete unit group, the concrete units 1b, 1c, 1d, and 1e form a concrete unit group, and the concrete units 1c, 1d, 1e, and 1f form a concrete unit group. Taking concrete unit 1a as an example, the other three concrete units adjacent to the concrete unit 1a form a concrete unit group, which can be the concrete units 1a, 1b, 1c, and 1d, or the concrete units 1f, 1a, 1b, and 1c, or the concrete units 1e, 1f, 1a, 1b, and 1c, that is, the concrete unit 1a is one of the four consecutive concrete units.

[0053] refer to Figure 4 A water stop groove 3 is provided at the relative connection of each concrete unit, and a water stop material 4 is provided at the water stop groove 3. By providing the water stop groove 3 and providing the water stop material in the water groove 3, the structure can be sealed to prevent water leakage.

[0054] Specifically, refer to Figure 1 Taking the concrete units 1a and 1f as an example, the outer side and the inner side of the connection between the concrete units 1a and 1f are provided with the water stop groove 3, respectively, and the water stop material 4 is provided in the water stop groove 3. Optionally, the water stop material is a rubber water stop strip or other water-swelling water stop material strip. The water stop material 4 plays a sealing role to ensure that a sealed space is formed inside the concrete pontoon shell.

[0055] In one embodiment, reference Figure 1 , 23. The concrete pontoon shell is a hexagonal concrete pontoon shell formed by connecting 6 concrete units, the 6 concrete units are respectively a first concrete unit 1a, a second concrete unit 1b, a third concrete unit 1c, a fourth concrete unit 1d, a fifth concrete unit 1e, and a sixth concrete unit 1f, and the 5 prestressed steel strands 2a, 2b, 2c, 2d, and 2e are evenly spaced in the height direction and arranged in rows inside any consecutive 4 of the 6 concrete units 1a, 1b, 1c, 1d, 1e, and 1f, and are used to perform circumferential tensioning on any consecutive 4 concrete units.

[0056] Specifically, in one embodiment, reference Figure 1 , 2 3. In the concrete pontoon shell, the prestressed steel bundle 2a is arranged on the concrete units 1e, 1f, 1a, and 1b, and the prestressed steel bundle 2a is provided on the first layer of the concrete pontoon shell from the top to the bottom.

[0057] Specifically, in one embodiment, reference Figure 1 , 2 3. In the concrete pontoon shell, the prestressed steel bundle 2b is arranged on the concrete units 1b, 1c, 1d, and 1e, and the prestressed steel bundle 2b is provided on the second layer from the top to the bottom of the concrete pontoon shell.

[0058] Specifically, in one embodiment, reference Figure 1 , 2 3. In the concrete pontoon shell, the prestressed steel bundle 2c is arranged on the concrete units 1f, 1a, 1b, and 1c, and the prestressed steel bundle 2c is provided on the third layer from the top to the bottom of the concrete pontoon shell.

[0059] Specifically, in one embodiment, reference Figure 1 , 2 3. In the concrete pontoon shell, the prestressed steel bundle 2d is arranged on the concrete units 1c, 1d, 1e, and 1f, and the prestressed steel bundle 2d is provided on the fourth layer from the top to the bottom of the concrete pontoon shell.

[0060] Specifically, in one embodiment, reference Figure 1 , 2 3. In the concrete pontoon shell, the prestressed steel bundle 2e is arranged on the concrete units 1a, 1b, 1c, and 1d, and the prestressed steel bundle 2e is provided on the fifth layer from the top to the bottom of the concrete pontoon shell.

[0061] In short, the prestressed steel strands 2a, 2b, 2c, 2d, and 2e divide four consecutive concrete units among the six concrete units 1a, 1b, 1c, 1d, 1e, and 1f into one concrete unit for tensioning, and finally the six concrete units are tensioned into a whole to form a concrete pontoon.

[0062] In one embodiment, reference Figure 1 , the odd-numbered steel strands in the M prestressed steel strands are arranged inside the first concrete unit 1a, the second concrete unit 1b, the third concrete unit 1c and the fourth concrete unit 1d, and the first concrete unit 1a, the second concrete unit 1b, the third concrete unit 1c and the fourth concrete unit 1d are circumferentially tensioned;

[0063] The even-numbered layers of the M prestressed steel strands are arranged inside the fourth concrete unit 1d, the fifth concrete unit 1e, the sixth concrete unit 1f and the first concrete unit 1a, and the fourth concrete unit 1d, the fifth concrete unit 1e, the sixth concrete unit 1f and the first concrete unit 1a are circumferentially tensioned.

[0064] It should be noted that the prestressed steel strands 2a, 2b, 2c, 2d, 2e are arranged in rows evenly spaced in the height direction and tensioned in the six concrete units 1a, 1b, 1c, 1d, 1e, 1f, and each height level is only tensioned on four adjacent concrete slab units. Each prestressed steel strand is tensioned at both ends at the same time, which can avoid excessive tension on one side and damage to the concrete slab unit, and can effectively reduce prestress loss.

[0065] In one embodiment, at the connection point between two adjacent concrete units, the interface of the corrugated pipe hole is provided with a blunt chamfered structure. This arrangement is to facilitate the prestressed steel strand to pass through the adjacent concrete units, which can effectively improve the construction efficiency.

[0066] In one embodiment, reference Figure 5 Both ends of any one of the prestressed steel strands 2a, 2b, 2c, 2d, and 2e are also connected to an anchor head 10, and the end of the anchor head 10 opposite to the corrugated pipe hole is configured as a truncated cone structure, and is anchored to the outside of the corrugated pipe hole through the truncated cone structure, and the anchor head 10 is anchored in the middle of the inner side of the concrete unit.

[0067] It should be noted that the outer diameter of the end of the truncated cone structure away from the corrugated pipe hole is larger than the diameter of the corrugated pipe hole, so that the anchor head 10 can be firmly anchored on the outside of the corrugated pipe hole.

[0068] refer to Figure 5 A corrugated pipe 11 is sleeved in the corrugated pipe hole, and the prestressed steel bundle is sleeved in the corrugated pipe 11.

[0069] Specifically, by providing the bellows 11, it has better ductility, so that the prestressed steel bundle can follow the deformation when it is deformed without causing structural damage. Therefore, it has better adaptability and can improve the performance of the overall structure.

[0070] In one embodiment, reference Figure 6 and 7 , and also includes a pier head structure 12, which is L-shaped, and one side is arranged at the inner side surface of the concrete unit, and the other side is arranged at the end surface of the concrete unit, and the corrugated pipe hole is allowed to pass through, that is, the pier head structure 12 is provided with an opening relative to the passage of the corrugated pipe and the prestressed steel bundle, which can allow the corrugated pipe and the prestressed steel bundle to pass through. Through the protection of the pier head structure 12, the prestressed steel bundle is prevented from damaging the end surface of the concrete unit, and the flatness of the end surface is maintained. In addition, the pier head structure 12 can be manufactured and connected together with the steel structure inside the concrete unit, and cast together.

[0071] Specifically, for example, in reference Figure 6 , 7 As shown, for example, the pier head structure 12 is provided in both concrete units 1f and 1a, and at the end faces where the concrete units 1f and 1a are connected, the two pier head structures 12 are connected to each other via one of their sides. Such an arrangement can prevent the end faces of the concrete units 1f and 1a from being damaged by the prestressed steel strands.

[0072] In addition, the function of the pier head structure is to be at the edge of the concrete unit and to compact the prestressed steel bundle. The prestressed steel bundle bypasses the pier head structure 12 of two adjacent concrete units, and then passes through the middle of the starting and ending concrete units to perform bidirectional tensioning, and is finally anchored through the anchoring structure 10.

[0073] refer to Figure 1 , 2 , 3, 4, the present invention provides a method for manufacturing an assembled concrete pontoon based on staggered prestressing tensioning technology, comprising the following steps:

[0074] Step 1, prefabricate N concrete units in a factory, and evenly open M layers of corrugated pipe holes arranged circumferentially through the interior and both end surfaces of the concrete units in the height direction, and the inner wall of the concrete unit is also provided with a pier head structure at the connection between two adjacent concrete units;

[0075] Specifically, in one embodiment, six concrete units are prefabricated in a factory, and water stop grooves 3 are provided at the connection between the two end surfaces of the concrete unit and another concrete unit, and five layers of corrugated pipe holes are evenly arranged in a circumferential direction through the interior and the two end surfaces of the concrete unit. The inner wall of the concrete unit is also provided with a pier head structure 10 at the connection between two adjacent concrete units;

[0076] Step 2, providing M prestressed steel tendons;

[0077] Specifically, for better description, in one embodiment, step 2 is to provide 5 prestressed steel tendons;

[0078] Step 3, arrange M prestressed steel strands in N concrete units at uniform intervals in the height direction, arrange any one of the prestressed steel strands inside n consecutive concrete units among the N concrete units, and circumferentially tension the n consecutive concrete units by the prestressed steel strands; wherein each concrete unit and the adjacent n-1 consecutive concrete units form a concrete unit group, the N concrete units are divided into multiple concrete unit groups, and the multiple concrete unit groups are all circumferentially tensioned by the prestressed steel strands to form a concrete pontoon shell, wherein n, N and M are all natural numbers, and n≤N.

[0079] In one embodiment, the concrete pontoon 100 includes six concrete units 1a, 1b, 1c, 1d, 1e, and 1f, and the six concrete units are connected to each other in the circumferential direction;

[0080] In the above embodiment, the concrete pontoon 100 includes five prestressed steel strands 2a, 2b, 2c, 2d, and 2e. The five prestressed steel strands are evenly spaced in the height direction and arranged in rows in the six concrete units, and the six concrete units form a concrete pontoon shell.

[0081] It should be noted that the starting end and the terminal end of any of the prestressed steel strands are arranged in the middle of the inner wall of the concrete unit, that is, the starting end and the terminal end of the prestressed steel strand are anchored in the middle of the inner wall of the concrete unit, for example Figure 1 As shown, the starting end of the prestressed steel bundle 2a is anchored in the middle of the inner wall of the concrete unit 1e, and the terminal end is anchored in the middle of the interior of the concrete unit 1b; as another example, the starting end of the prestressed steel bundle 2b is anchored in the middle of the inner wall of the concrete unit 1b, and the terminal end is anchored in the middle of the interior of the concrete unit 1e; it should also be noted that in the above embodiments, the structures of the starting end and the terminal end of the prestressed steel bundle are the same, that is, the prestressed steel bundle 2a can be anchored in a clockwise direction or in a counterclockwise direction.

[0082] Five layers of circumferentially arranged corrugated pipe holes are evenly spaced in the height direction throughout the interior and both end surfaces of each concrete unit, and the five prestressed steel strands 2a, 2b, 2c, 2d, and 2e are correspondingly passed through the five layers of corrugated pipe holes.

[0083] Any one of the prestressed steel strands is arranged inside four consecutive concrete units among the six concrete units, and is used to perform circumferential tensioning on the four consecutive concrete units.

[0084] Specifically, taking the prestressed steel bundle 2a as an example, the prestressed steel bundle 2a is arranged at the topmost layer of the concrete pontoon 100 from the top to the bottom, and is arranged inside the concrete units 1e, 1f, 1a, and 1b. The starting end of the prestressed steel bundle 2a is arranged at the inner middle part of the concrete unit 1e, and the terminal end is arranged inside the inner side of the concrete unit 1b.

[0085] Taking the prestressed steel bundle 2b as an example, the prestressed steel bundle 2b is arranged on the second layer from the top to the bottom of the concrete pontoon 100, and is arranged inside the concrete units 1b, 1c, 1d, and 1e. The starting end of the prestressed steel bundle 2b is arranged at the inner middle part of the concrete unit 1b, and the terminal end is arranged inside the inner side of the concrete unit 1e.

[0086] According to the above setting rules, the five prestressed steel strands 2a, 2b, 2c, 2d, and 2e are respectively passed through the holes of the five layers of corrugated pipes, and finally the six concrete units 1a, 1b, 1c, 1d, 1e, and 1f are circumferentially connected to each other, and the six concrete units are formed into a concrete pontoon shell.

[0087] Each of the concrete units and the adjacent n-1 continuous concrete units form a concrete unit group, and the N concrete units are divided into a plurality of concrete unit groups, which are now described as follows:

[0088] refer to Figure 1 , 3In one embodiment, every four concrete units form a concrete unit group, and the concrete units 1a, 1b, 1c, 1d, 1e, and 1f can form multiple concrete unit groups. For example, the concrete units 1a, 1b, 1c, and 1d form a concrete unit group, the concrete units 1b, 1c, 1d, and 1e form a concrete unit group, and the concrete units 1c, 1d, 1e, and 1f form a concrete unit group. Taking concrete unit 1a as an example, the other three concrete units adjacent to the concrete unit 1a form a concrete unit group, which can be the concrete units 1a, 1b, 1c, and 1d, or the concrete units 1f, 1a, 1b, and 1c, or the concrete units 1e, 1f, 1a, 1b, and 1c, that is, the concrete unit 1a is among the four consecutive concrete units. Reference Figure 4 A water stop groove 3 is provided at the relative connection of each concrete unit, and a water stop material 4 is provided at the water stop groove 3.

[0089] Specifically, refer to Figure 1 Taking the concrete units 1a and 1f as an example, the outer side and the inner side of the connection between the concrete units 1a and 1f are provided with the water stop groove 3, respectively, and the water stop material 4 is provided in the water stop groove 3. Optionally, the water stop material is a rubber water stop strip or other water-swelling water stop material strip. The water stop material 4 plays a sealing role to ensure that a sealed space is formed inside the concrete pontoon shell.

[0090] In one embodiment, reference Figure 1 , 2 3. The concrete pontoon shell is a hexagonal concrete pontoon shell formed by connecting 6 concrete units, the 6 concrete units are respectively a first concrete unit 1a, a second concrete unit 1b, a third concrete unit 1c, a fourth concrete unit 1d, a fifth concrete unit 1e, and a sixth concrete unit 1f, and the 5 prestressed steel strands 2a, 2b, 2c, 2d, and 2e are evenly spaced in the height direction and arranged in rows inside any consecutive 4 of the 6 concrete units 1a, 1b, 1c, 1d, 1e, and 1f, and are used to perform circumferential tensioning on any consecutive 4 concrete units.

[0091] Specifically, in one embodiment, reference Figure 1 , 2 3. In the concrete pontoon shell, the prestressed steel bundle 2a is arranged on the concrete units 1e, 1f, 1a, and 1b, and the prestressed steel bundle 2a is provided on the first layer of the concrete pontoon shell from the top to the bottom.

[0092] Specifically, in one embodiment, reference Figure 1 , 2 3. In the concrete pontoon shell, the prestressed steel bundle 2b is arranged on the concrete units 1b, 1c, 1d, and 1e, and the prestressed steel bundle 2b is provided on the second layer from the top to the bottom of the concrete pontoon shell.

[0093] Specifically, in one embodiment, reference Figure 1 , 2 3. In the concrete pontoon shell, the prestressed steel bundle 2c is arranged on the concrete units 1f, 1a, 1b, and 1c, and the prestressed steel bundle 2c is provided on the third layer from the top to the bottom of the concrete pontoon shell.

[0094] Specifically, in one embodiment, reference Figure 1 , 2 3. In the concrete pontoon shell, the prestressed steel bundle 2d is arranged on the concrete units 1c, 1d, 1e, and 1f, and the prestressed steel bundle 2d is provided on the fourth layer from the top to the bottom of the concrete pontoon shell.

[0095] Specifically, in one embodiment, reference Figure 1 , 2 3. In the concrete pontoon shell, the prestressed steel bundle 2e is arranged on the concrete units 1a, 1b, 1c, and 1d, and the prestressed steel bundle 2e is provided on the fifth layer from the top to the bottom of the concrete pontoon shell.

[0096] In one embodiment, reference Figure 1 , the odd-numbered steel strands in the M prestressed steel strands are arranged inside the first concrete unit 1a, the second concrete unit 1b, the third concrete unit 1c and the fourth concrete unit 1d, and the first concrete unit 1a, the second concrete unit 1b, the third concrete unit 1c and the fourth concrete unit 1d are circumferentially tensioned;

[0097] The even-numbered layers of the six prestressed steel strands are arranged inside the fourth concrete unit 1d, the fifth concrete unit 1e, the sixth concrete unit 1f and the first concrete unit 1a, and the fourth concrete unit 1d, the fifth concrete unit 1e, the sixth concrete unit 1f and the first concrete unit 1a are circumferentially tensioned.

[0098] It should be noted that the prestressed steel strands 2a, 2b, 2c, 2d, 2e are arranged in rows evenly spaced in the height direction for tensioning in the six concrete units 1a, 1b, 1c, 1d, 1e, 1f, and each height level is only tensioned on four adjacent concrete slab units. Each prestressed steel strand is tensioned at both ends simultaneously, which can avoid excessive tension on one side and damage to the concrete slab unit, and can effectively reduce prestress loss.

[0099] In one embodiment, at the connection point between two adjacent concrete units, the interface of the corrugated pipe hole is provided with a blunt chamfered structure. This is provided so that the prestressed steel strand can easily pass through the adjacent concrete units, and standardized construction can effectively improve construction efficiency.

[0100] In one embodiment, reference Figure 5 Both ends of any one of the prestressed steel strands 2a, 2b, 2c, 2d, and 2e are also connected to an anchor head 10, and the end of the anchor head 10 opposite to the corrugated pipe hole is configured as a truncated cone structure, and is anchored to the outside of the corrugated pipe hole through the truncated cone structure, and the anchor head 10 is anchored in the middle of the inner side of the concrete unit.

[0101] The present invention is applied to marine structures, where adjacent concrete units are aligned and closed, and the nodes between the panels are connected by alternately connecting prestressed steel strands along the height and circumferential direction, forming a continuous and stable spatial load-bearing system, which greatly improves the integrity and safety of the assembled marine structures.

[0102] The present invention adopts prestressed splicing technology with reliable quality, high connection strength, convenient construction, and can realize full dry operation on site. In addition, the post-tensioning non-bonded prestressed assembly method is adopted, and the damaged unit can be quickly replaced after the plate is damaged. The splicing method is simple, the connection method is reliable, and the centering adjustment is controllable, which solves the problem of difficult adjustment of cast-in-place nodes;

[0103] All structural load-bearing components are prefabricated, and the concrete slabs are completed in the factory in advance, which can greatly save manpower and material resources, reduce on-site construction work, and significantly improve construction efficiency. Pipelines or pipe grooves can be pre-buried in the slabs according to actual construction needs;

[0104] The use of a hybrid structure of prestressed steel strands and concrete is conducive to leveraging the advantages of both materials. The entire structure has high strength, high rigidity, good hydrodynamic performance, low construction cost and strong market competitiveness.

[0105] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. An assembled concrete pontoon based on staggered prestressed tensioning technology, It is characterized in that include: N concrete units, wherein the N concrete units are connected to each other in a circumferential direction; M prestressed steel strands are evenly spaced in the height direction and arranged in rows in the N concrete units, and any one of the prestressed steel strands is arranged inside n consecutive concrete units among the N concrete units and is used to circumferentially tension the n consecutive concrete units, each of the concrete units and the adjacent n-1 consecutive concrete units form a concrete unit group, the N concrete units are divided into a plurality of concrete unit groups, and the plurality of concrete unit groups are all circumferentially tensioned by the prestressed steel strands to form a concrete pontoon shell, wherein n, N and M are all natural numbers, and n<N.

2. The assembled concrete pontoon based on staggered prestressing tensioning technology as claimed in claim 1, It is characterized in that M layers of circumferentially arranged corrugated pipe holes are evenly spaced in rows and run through the interior and both end surfaces of each concrete unit in the height direction, and the M prestressed steel strands are correspondingly passed through the M layers of corrugated pipe holes.

3. The assembled concrete pontoon based on staggered prestressing tensioning technology as claimed in claim 1, It is characterized in that A water stop groove is provided at the relative connection of each concrete unit, and a water stop material is arranged at the water stop groove.

4. The assembled concrete pontoon based on staggered prestressing tensioning technology as claimed in claim 1, It is characterized in that When N=6, n=4, the concrete pontoon shell is a hexagonal concrete pontoon shell formed by connecting 6 concrete units, the 6 concrete units are respectively a first concrete unit, a second concrete unit, a third concrete unit, a fourth concrete unit, a fifth concrete unit, and a sixth concrete unit, and the M prestressed steel strands are evenly spaced in the height direction and arranged inside any consecutive 4 of the 6 concrete units, and are used to perform circumferential tensioning on any consecutive 4 concrete units.

5. The assembled concrete pontoon based on staggered prestressing tensioning technology as claimed in claim 4, It is characterized in that The odd-numbered steel strands in the M prestressed steel strands are arranged inside the first concrete unit, the second concrete unit, the third concrete unit and the fourth concrete unit, and the first concrete unit, the second concrete unit, the third concrete unit and the fourth concrete unit are circumferentially tensioned; An even number of layers of the M prestressed steel strands are arranged inside the fourth concrete unit, the fifth concrete unit, the sixth concrete unit and the first concrete unit, and the fourth concrete unit, the fifth concrete unit, the sixth concrete unit and the first concrete unit are circumferentially tensioned.

6. The assembled concrete pontoon based on staggered prestressing tensioning technology as claimed in claim 2, It is characterized in that At the connection point between two adjacent concrete units, the interface of the corrugated pipe hole is provided with a blunt chamfered structure.

7. The assembled concrete pontoon based on staggered prestressing tensioning technology as claimed in claim 2, It is characterized in that Both ends of the prestressed steel bundle are also connected with anchor heads, and the end of the anchor head opposite to the corrugated pipe hole is arranged into a truncated cone structure and is anchored to the outside of the corrugated pipe hole through the truncated cone structure.

8. The assembled concrete pontoon based on staggered prestressing tensioning technology as claimed in claim 2, It is characterized in that A corrugated pipe is sleeved in the corrugated pipe hole, and the prestressed steel bundle is sleeved in the corrugated pipe.

9. The assembled concrete pontoon based on staggered prestressing tensioning technology as claimed in claim 2, It is characterized in that It also includes a pier head structure, which is L-shaped, with one side arranged at the inner side of the concrete unit and the other side arranged at the end surface of the concrete unit, and allows the corrugated pipe hole to pass through.

10. A method for manufacturing an assembled concrete pontoon based on staggered prestressing tensioning technology as claimed in claim 2, It is characterized in that The steps include: Step 1, prefabricate N concrete units in a factory, and evenly open M layers of corrugated pipe holes arranged circumferentially through the interior and both end surfaces of the concrete units in the height direction, and the inner wall of the concrete unit is also provided with a pier head structure at the connection between two adjacent concrete units; Step 2, providing M prestressed steel tendons; Step 3, arrange M prestressed steel strands in N concrete units at uniform intervals in the height direction, arrange any one of the prestressed steel strands inside n consecutive concrete units among the N concrete units, and circumferentially tension the n consecutive concrete units by the prestressed steel strands; wherein each concrete unit and the adjacent n-1 consecutive concrete units form a concrete unit group, the N concrete units are divided into multiple concrete unit groups, and the multiple concrete unit groups are all circumferentially tensioned by the prestressed steel strands to form a concrete pontoon shell, wherein n, N and M are all natural numbers, and n<N.

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