CN114027235A

CN114027235A - Prefabricated UHPC fish farm cage and its construction method

Info

Publication number: CN114027235A
Application number: CN202111063204.6A
Authority: CN
Inventors: 水中和; 郑子杭; 王雷冲; 孟旭
Original assignee: Advanced Engineering Technology Institute Of Zhongshan City And Wuhan University Of Technology; Wuhan University of Technology WUT
Current assignee: Advanced Engineering Technology Institute Of Zhongshan City And Wuhan University Of Technology; Wuhan University of Technology WUT
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2022-02-11

Abstract

The invention discloses a prefabricated UHPC fishery net cage and a construction method thereof. The UHPC fishery net cage comprises an upper-layer floating frame, a lower-layer counterweight frame and a hollow vertical pipe connecting the two, and the upper-layer floating frame is provided with several The transverse upper tensioning tunnel, each upper tensioning tunnel is provided with prestressed tendons, both ends of the upper floating frame are provided with upper prestressed tendon anchors for tightening the prestressed tendons, and the lower counterweight frame is provided with There are several transverse lower tensioning tunnels, each lower tensioning tunnel is provided with prestressed tendons, and both ends of the lower counterweight frame are provided with lower prestressed tendon anchors for tightening the prestressed tendons. The UHPC fishery net cage of the invention has reasonable structure, strong resistance to wave impact and good stability.

Description

Prefabricated UHPC (ultra high performance polycarbonate) fishing ground net cage and construction method thereof

Technical Field

The invention belongs to the technical field of ocean engineering facilities, and particularly relates to a prefabricated UHPC (ultra high performance concrete) fishing ground net cage and a construction method thereof.

Background

With the decline of fishery resources, the marine fishery is mainly changed from the fishing industry to the aquaculture industry, the aquaculture area is gradually expanded from land to sea from offshore estuaries to deep water and deep and open sea, seawater cage culture is one of the important forms of aquaculture activities, the current cage of the fishery mainly takes steel materials as a main structural body, and the cage is rarely built by using cement-based materials. Still have the marine environment under the serious problem of corroding when using traditional steel construction, the maintenance cost is high, has influenced the sustainable development of open sea fishing ground.

With the continuous and deep research and application of Ultra High Performance Concrete (UHPC) materials, the superiority of the UHPC materials as marine floating structures is gradually highlighted. Compared with a traditional steel structure, the structure taking the UHPC as the main material has the characteristics of high strength and high toughness, and simultaneously has stronger resistance to the corrosion reaction of seawater in the marine environment, and has wide application prospect as the structural material of the fishing ground net cage.

Chinese patent publication No. CN 112722178A discloses an anti-rolling UHPC pipe-box combination floating structure and a construction method thereof, the UHPC pipe-box combination floating structure is composed of three layers of members and is connected by high-strength high-toughness hollow pipes, main lifting stress is concentrated near the water surface by optimizing configuration of structural buoyancy and weight, and surrounds the edge of the structure, and simultaneously the gravity center of the structure is reduced to the lowest, thereby forming an anti-rolling system of the floating structure, and the structure has functions of floating, bearing, anti-rolling and the like. However, in the UHPC pipe-box combined floating structure, the annular buoyancy tank forms the whole upper layer structure, and the length and width of the constructed floating structure are small and the cost performance is low under the condition of limiting the usage amount of UHPC materials.

Meanwhile, the Chinese patent with the publication number of CN 111846131A also discloses an assembled UHPC pipe-box combined floating structure and a construction method thereof, the UHPC pipe-box combined floating structure is formed by assembling a plurality of prefabricated small and medium-sized UHPC thin-wall boxes, connecting sleeves and UHPC pipes, the pipe-box combination has stable structure, various forms and strong corrosion resistance, can form a single-layer shallow draft floating platform and a two-layer or multi-layer semi-submersible framework structure platform, and has wide redevelopment potential and application prospect. Compared with the above-mentioned anti-rolling UHPC pipe-box combined floating structure, under the condition of limiting the usage amount of UHPC material, the length and width of the built floating structure are larger, and the cost performance is higher. However, such floating structures also have problems in that the hollow box and the UHPC pipe are connected by means of plugging in each layer of floating structure, the longitudinal connection strength is low, and the resistance to wave impact in the marine environment is poor.

Disclosure of Invention

In view of the above, the invention aims to provide a prefabricated UHPC (ultra high performance concrete) fishing ground net cage which is reasonable in structure, strong in resistance to sea wave impact and good in stability and a construction method thereof.

The technical scheme adopted by the invention for solving the technical problem is as follows:

the utility model provides a prefabricated assembled UHPC fishing ground box with a net, includes upper floating frame, lower floor's counter weight frame and the cavity standpipe of connecting the two, upper floating frame is including splicing into a plurality of cavity box and a plurality of upper crossbeam of frame construction, upper floating frame is provided with a plurality of horizontal upper stretch-draw pore, all wears to be equipped with prestressed muscle in every upper stretch-draw pore, upper floating frame's both ends all are provided with the taut upper prestressed muscle ground tackle of prestressed muscle, the inside of cavity box and the inside of hollow standpipe all are filled with light filler, lower floor's counter weight frame is including splicing into a plurality of lower floor's crossbeam and a plurality of lower floor longitudinal member of frame construction, lower floor's counter weight frame is provided with a plurality of horizontal lower floor's stretch-draw pore, all wears to be equipped with prestressed muscle in every lower floor's stretch-draw pore, lower floor's counter weight frame's both ends all are provided with the taut lower floor's prestressed muscle ground tackle of prestressed muscle .

In a preferred scheme of the invention, each hollow box body is arranged in a row at intervals, every two adjacent hollow box bodies are connected through a plurality of upper-layer cross beams, and the upper-layer tensioning pore passage comprises a first pore section arranged in the hollow box body and a second pore section arranged in the upper-layer cross beams.

In a preferred scheme of the invention, the upper-layer cross beam is spliced with the hollow box body, and the splicing part of the upper-layer cross beam and the hollow box body is solidified through sealant.

In a preferred scheme of the invention, the upper-layer cross beam comprises a plurality of hollow sections and a plurality of solid sections which are arranged in a staggered mode, light filling materials are filled in the hollow sections, the solid sections are provided with first insertion holes, the hollow vertical pipe comprises a small-caliber UHPC pipe, the upper end part of the small-caliber UHPC pipe is in insertion fit with the first insertion holes, and the small-caliber UHPC pipe and the first insertion holes are fixedly connected through sealing glue.

In a preferred scheme of the invention, the lower-layer beam and the lower-layer longitudinal member are both solid UHPC rod members, the lower-layer beam is provided with a second insertion hole corresponding to the first insertion hole, the lower end part of the small-caliber UHPC pipe is in insertion fit with the second insertion hole, and the lower end part and the second insertion hole are fixedly connected through a sealant.

In a preferred embodiment of the present invention, an upper layer tension pipeline arranged along the length direction of the upper layer beam is embedded in the upper layer beam, the upper layer tension pipeline sequentially passes through all the hollow sections and the solid sections, and an inner hole of the upper layer tension pipeline forms the second hole section.

In a preferred scheme of the invention, the lower-layer longitudinal member comprises solid bottom plates respectively positioned at two ends of the lower-layer counterweight structure, all the lower-layer cross beams are connected between the two solid bottom plates, and the lower-layer prestressed tendon anchorage device is arranged at the outer side part of the solid bottom plates.

In a preferred aspect of the present invention, the lower layer tensioning duct includes a third duct section disposed in the solid bottom plate and a fourth duct section disposed in the lower layer cross member.

In a preferred embodiment of the present invention, the lower cross beam has embedded therein a lower tension pipe arranged along a length direction thereof, and an inner hole of the lower tension pipe forms the fourth hole section.

In a preferred embodiment of the present invention, the number of the lower layer beams is 2, and the lower layer longitudinal member further includes a lower layer longitudinal bar connected between the 2 lower layer beams.

In a preferred embodiment of the present invention, the lower longitudinal rod is inserted into the lower cross beam, and the insertion position of the lower longitudinal member is staggered from the insertion position of the small-bore UHPC pipe, so as to avoid a stress weak point.

In a preferred scheme of the invention, the number of the hollow boxes is 3 or more, the hollow boxes at two ends of the upper floating frame are end boxes, the hollow box between the two end boxes is a middle box, the upper prestressed tendon anchorage is arranged at the outer side part of the end boxes, and the hollow vertical pipe comprises a large-caliber UHPC pipe connected between a solid bottom plate and the corresponding end box.

In a preferred embodiment of the present invention, the upper end of the large-caliber UHPC pipe is inserted into the end box, and the lower end of the large-caliber UHPC pipe is inserted into the solid bottom plate.

A method for building a prefabricated UHPC (ultra high Performance concrete) fishery net cage is used for building the prefabricated UHPC fishery net cage and comprises the following steps:

s1, manufacturing accessories, namely manufacturing a hollow box body, an upper-layer cross beam, a hollow vertical pipe, a lower-layer cross beam and a lower-layer longitudinal piece respectively;

s2, assembling and forming an upper floating structure, arranging the hollow box bodies at intervals in a row, installing an upper cross beam between the adjacent hollow box bodies, aligning a first hole section in the hollow box body with a second hole section in the upper cross beam to form a plurality of upper tensioning hole channels, penetrating prestressed tendons into each upper tensioning hole channel, tensioning the prestressed tendons by using an upper prestressed tendon anchorage device, tensioning the prestressed tendons, and then filling cement slurry into the upper tensioning hole channels to enable the prestressed tendons, the upper cross beam and the hollow box bodies to form a whole;

s3, assembling and forming a lower-layer counterweight structure, namely, mounting all lower-layer beams between two solid bottom plates, aligning a third hole section in each solid bottom plate with a fourth hole section in each lower-layer beam to form a plurality of lower-layer tensioning channels, penetrating prestressed tendons into each lower-layer tensioning channel, tensioning the prestressed tendons by using a lower-layer prestressed tendon anchorage device, tensioning the prestressed tendons, and then filling cement slurry into the lower-layer tensioning channels to enable the prestressed tendons, the lower-layer beams and the solid bottom plates to form a whole;

and S4, assembling the upper layer and the lower layer, wherein the hollow vertical pipe comprises a small-caliber UHPC pipe and a large-caliber UHPC pipe, the upper layer cross beam and the lower layer cross beam are connected through the small-caliber UHPC pipe, and the solid bottom plate is connected with the corresponding hollow box body through the large-caliber UHPC pipe.

In a preferred embodiment of the present invention, after step S4 is performed, step S5 is performed, and sealing and consolidating are performed at the joints of all the components by grouting or glue injection.

The invention has the beneficial effects that:

1. the invention is assembled by an upper-layer floating frame, a lower-layer counterweight frame and a hollow vertical pipe which are prefabricated by UHPC materials, wherein the upper-layer floating frame is assembled by a hollow box body and an upper-layer cross beam, and the lower-layer counterweight frame is assembled by a lower-layer cross beam, a solid bottom plate and a lower-layer longitudinal rod, thereby ensuring reasonable stress of the structure, strong integrity, strong resistance to wave impact in the marine environment and good stability.

2. After the upper floating frame and the lower counterweight frame are assembled and molded, the prestressed tendons in the upper tensioning channel are tensioned through the upper prestressed tendon anchorage device, and the prestressed tendons in the lower tensioning channel are tensioned through the lower prestressed tendon anchorage device, so that the transverse strength and the rigidity of the whole structure can be enhanced.

3. The main structural material of the net cage structure is UHPC, and the net cage structure has high strength, good toughness, a series of excellent performances such as corrosion resistance, impact resistance and the like; the hollow vertical pipes and the hollow box body are provided with a large number of cavities, so that sufficient buoyancy can be provided for the structure; the cavity is filled with light filling materials, and the original working state can be kept under the condition that the defects such as cracks and the like appear on the surface of the structure.

4. The UHPC components used in the structure are all prefabricated in factories, and compared with the traditional net cage, the quality of the UHPC net cage can be better controlled, and materials can be saved; the construction strength is reduced, the whole construction period of the structure manufacturing is shortened, and the popularization and the use are facilitated; the maintenance cost of the net cage can be reduced, and the service life of the net cage is prolonged.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a schematic view showing a connection structure of the end tank and the upper cross member;

FIG. 4 is a schematic view of a connection structure of a middle box body and an upper-layer cross beam;

FIG. 5 is a schematic view of a connection structure of a solid bottom plate and a lower-layer cross beam;

FIG. 6 is a schematic structural view of the upper beam;

fig. 7 is a schematic view of a connection structure of the lower vertical bar and the lower cross beam.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly. In addition, the descriptions related to "preferred", "less preferred", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "preferred" or "less preferred" may explicitly or implicitly include at least one such feature.

Referring to fig. 1 to 7, the prefabricated UHPC fishing ground net cage comprises an upper floating frame, a lower counterweight frame and a hollow vertical pipe 1 connecting the upper floating frame and the lower counterweight frame.

The upper floating frame comprises a plurality of hollow boxes 2 and a plurality of upper beams 3 which are assembled into a frame structure, a box cavity 202 is formed in each of the hollow boxes 2, the upper floating frame is provided with a plurality of transverse upper tensioning channels 41, prestressed tendons 42 are arranged in each upper tensioning channel 41 in a penetrating mode, both ends of the upper floating frame are provided with upper prestressed tendon anchors 43 which tension the prestressed tendons 42, and light fillers such as foamed plastics are filled in the hollow boxes 2 and the hollow vertical pipes 1, such as polyphenyl or polyurethane foamed plastics.

The lower-layer counterweight frame comprises a plurality of lower-layer cross beams 5 and a plurality of lower-layer longitudinal pieces 6 which are spliced into a frame structure, the lower-layer counterweight frame is provided with a plurality of transverse lower-layer tensioning holes 71, prestressed tendons 42 are arranged in each lower-layer tensioning hole 71 in a penetrating mode, and lower-layer prestressed tendon anchors 72 which strain the prestressed tendons 42 are arranged at two ends of the lower-layer counterweight frame.

The hollow box body 2, the upper-layer cross beam 3, the hollow vertical pipe 1, the lower-layer cross beam 5 and the lower-layer longitudinal member 6 are all prepared from a high-strength high-toughness cement-based composite material taking UHPC as a main material.

After the upper floating frame and the lower counterweight frame are assembled and molded, the prestressed tendons 42 in the upper tensioning channel 41 are tensioned through the upper prestressed tendon anchorage device 43, and the prestressed tendons 42 in the lower tensioning channel 71 are tensioned through the lower prestressed tendon anchorage device 72, so that the transverse strength and the rigidity of the whole structure can be enhanced.

Referring to fig. 1 and 2, in a preferred embodiment of the present invention, each hollow box body 2 is arranged in a row at intervals, every two adjacent hollow box bodies 2 are connected by a plurality of upper beams 3, and the upper layer tension duct 41 includes a first hole section 411 arranged in the hollow box body 2 and a second hole section 412 arranged in the upper beam 3.

The upper layer beam 3 is spliced with the hollow box body 2, and the splicing position of the upper layer beam and the hollow box body is fixedly connected through sealant. Specifically, a transverse insertion hole 203 is formed in the hollow box body 2, and an insertion block which is in insertion fit with the insertion hole 203 is arranged at the end of the upper-layer cross beam 3.

As a further improvement of the invention, the upper-layer cross beam 3 comprises a plurality of hollow sections 31 and a plurality of solid sections 32 which are arranged in a staggered manner, light filling materials such as foamed plastics are filled in the hollow sections 31, the solid sections 32 are provided with first jacks 301, the hollow vertical tube 1 comprises small-caliber UHPC tubes 11, the upper end parts of the small-caliber UHPC tubes 11 are in splicing fit with the first jacks 301, and the small-caliber UHPC tubes and the first jacks 301 are fixedly connected through sealing glue. An upper layer tension pipeline arranged along the length direction of the upper layer cross beam 3 is embedded in the upper layer cross beam, the upper layer tension pipeline sequentially penetrates through all the hollow sections 31 and the solid sections 32, and an inner hole of the upper layer tension pipeline forms the second hole section 412.

The lower-layer beam 5 is a solid UHPC beam, the lower-layer beam 5 is provided with a second jack 501 corresponding to the first jack 301, the lower end part of the small-caliber UHPC pipe 11 is in splicing fit with the second jack 501, and the lower end part and the second jack are fixedly connected through a sealant.

Further, the lower-layer longitudinal member 6 further comprises solid bottom plates 61 respectively located at two ends of the lower-layer counterweight structure, all the lower-layer beams 5 are connected between the two solid bottom plates 61, and the lower-layer prestressed tendon anchors 72 are arranged at the outer side portions of the solid bottom plates 61. Preferably, the solid bottom plate 61 is provided with a plug hole 612, and the end of the lower-layer beam 5 is inserted into the plug hole 612 and is fixed between the two through a sealant.

Referring to fig. 1 and 2, in a preferred embodiment of the present invention, the lower tension duct 71 includes a third duct section 711 provided in the solid bottom plate 61 and a fourth duct section 712 provided in the lower cross member 5. Specifically, the lower cross member 5 has embedded therein a lower tension pipe arranged along the length direction thereof, and an inner hole of the lower tension pipe constitutes the fourth hole section 712.

Referring to fig. 1, the number of lower cross members 5 is generally set to 2, and the lower longitudinal members 6 further include lower side rails 62 connected between the 2 lower cross members 5.

The lower-layer cross beam 5 is provided with insertion holes 502 corresponding to the lower-layer longitudinal rods 62, and two ends of the lower-layer longitudinal rods 62 are respectively inserted into the insertion holes 502 of the two lower-layer cross beams 5 to reinforce the longitudinal strength and rigidity of the lower-layer counterweight frame. On the lower-layer cross beam 5, the splicing position of the lower-layer longitudinal piece 6 is staggered with that of the small-caliber UHPC pipe 11, so that a stress weak part is avoided.

The quantity of cavity box 2 is 2 and more than, and the quantity when cavity box 2 is 3 and more than, and the cavity box 2 that is located upper strata floating frame both ends is the tip box, and the cavity box 2 that is located between two tip boxes is the middle part box, and upper prestressing tendons ground tackle 43 sets up in the outside portion of tip box, and when the quantity of cavity box 2 was 2, two cavity boxes 2 all were located the both ends of upper strata floating frame, and the two is the tip box.

Further, the hollow riser 1 also comprises a UHPC pipe 12 of large diameter connected between the solid floor 61 and the corresponding end tank. The lower surface of the end box body and the upper surface of the solid bottom plate 61 are both provided with a jack 202 slightly larger than the large-caliber UHPC pipe 12, the upper end of the large-caliber UHPC pipe 12 is inserted into the jack 202 on the lower surface of the end box body, the lower end of the large-caliber UHPC pipe 12 is inserted into the jack 611 on the upper surface of the solid bottom plate 61 to connect the end box body with the solid bottom plate 61, and the splicing part of the large-caliber UHPC pipe 12 and the end box body and the splicing part of the large-caliber UHPC pipe 12 and the solid bottom are both solidified through sealant.

The average density of the whole assembled UHPC fishing ground net cage needs to be less than that of seawater, so that the assembled UHPC fishing ground net cage can float in the seawater. The average density of upper strata floating frame should be less than the average density of lower floor's counter weight frame, generally all sets up solid construction with the solid bottom plate 61 of lower floor's counter weight frame, lower floor's crossbeam 5, lower floor vertical pole 62 for reduce the focus, reinforcing box with a net to the adaptability of various operating modes in ocean complex environment, can reduce the amplitude of rocking under the impact of wave, prevent to tumble.

The construction method for constructing the prefabricated UHPC fishing ground net cage comprises the following steps:

s1, manufacturing accessories, namely manufacturing a hollow box body 2, an upper-layer cross beam 3, a large-caliber UHPC pipe 12, a small-caliber UHPC pipe 11, a lower-layer cross beam 5, a lower-layer longitudinal rod 62 and a solid bottom plate 61 respectively;

s2, assembling and forming an upper floating structure, arranging the hollow box bodies 2 at intervals in a row, installing an upper cross beam 3 between the adjacent hollow box bodies 2, aligning a first hole section 411 in the hollow box bodies 2 with a second hole section 412 in the upper cross beam 3 to form a plurality of upper tensioning hole channels 41, penetrating prestressed tendons 42 into each upper tensioning hole channel 41, tensioning the prestressed tendons 42 by using an upper prestressed tendon anchorage device 43, tensioning the prestressed tendons 42, and then pouring cement slurry into the upper tensioning hole channels 41 to enable the prestressed tendons 42, the upper cross beam 3 and the hollow box bodies 2 to form a whole;

s3, assembling and forming a lower-layer counterweight structure, connecting all lower-layer beams 5 together through lower-layer longitudinal rods 62, installing all the lower-layer beams 5 between two solid bottom plates 61, aligning a third hole section 711 in each solid bottom plate 61 with a fourth hole section 712 in each lower-layer beam 5 to form a plurality of lower-layer tensioning hole channels 71, penetrating prestressed tendons 42 into each lower-layer tensioning hole channel 71, tensioning the prestressed tendons 42 by using a lower-layer prestressed tendon anchorage device 72, tensioning the prestressed tendons 42, and then pouring cement slurry into the lower-layer tensioning hole channels 71 to enable the prestressed tendons 42, the lower-layer beams 5 and the solid bottom plates 61 to form a whole;

and S4, assembling the upper layer and the lower layer, connecting the upper layer beam 3 with the lower layer beam 5 through a small-caliber UHPC pipe 11, and connecting the solid bottom plate 61 with the corresponding hollow box body 2 through a large-caliber UHPC pipe 12.

And S5, sealing and solidifying the joints of all the components in a grouting or glue injection mode.

In the step S1, the method for manufacturing the hollow box 2, the upper beam 3, the large-diameter UHPC pipe 12, and the small-diameter UHPC pipe 11 includes: firstly, a blank of a hollow box body 2, an upper layer beam 3, a large-caliber UHPC pipe 12 and a small-caliber UHPC pipe 11 is made of a high-strength high-toughness cement-based composite material, when the blank is hardened, light fillers such as foamed plastics and the like are injected into inner cavities of the hollow box body 2, the upper layer beam 3, the large-caliber UHPC pipe 12 and the small-caliber UHPC pipe 11, and then an injection opening for injecting the light fillers is sealed.

The above 5 steps are performed at the same time with S1, S2 and S3, or S2, or S3, S2 and S3, then S4 and finally S5.

Example 1

The prefabricated UHPC fishing ground net cage provided by the embodiment is formed by mutually splicing and assembling a hollow box body 2, an upper-layer cross beam 3, a large-caliber UHPC pipe 12, a small-caliber UHPC pipe 11, a lower-layer cross beam 5, a lower-layer longitudinal rod 62 and a solid bottom plate 61.

In this example, the hollow box 2 is 5000 × 2000 × 500mm in size, the side wall thickness is 30mm, the box cavity 202 is located at the center of the box and is 2500 × 1500 × 400mm in size, and the vertical insertion holes in the hollow box 2 have a radius of 600mm and a height of 400 mm. The solid bottom plate 61 has a size of 5000 × 2000 × 200mm, and has a vertical insertion hole with a radius same as that of the hollow box 2 and a height of 100 mm. The size of the upper layer beam 3 is 5000 multiplied by 500mm, the size of the lower layer beam 5 is 12000 multiplied by 500mm, and the size of the lower layer vertical rod 62 is 4000 multiplied by 500 multiplied by 200 mm. The radius of the large-caliber UHPC pipe 12 is 600mm, and the height is 1000 mm; the radius of the small-caliber UHPC pipe 11 is 200mm, and the height is 1000 mm. In combination with the dimensions of the individual components, an overall length of the structure of 16m, a width of 5m, an overall aspect ratio of about 3: 1, the specific parameters are detailed in table 1.

TABLE 1 prefabricated UHPC net cage component dimension parameter table

Name (R)	Length, width and height/mm	Wall thickness/mm	Number/number	Volume/m³	Mass/kg
						Hollow box 2	5000×2000×500	30	3	2.3496	6109.09
Case cavity 202	2500×1500×400		3	4.5000	0
						Solid base plate 61	5000×2000×200		2	3.8870	10106.2
Upper layer beam 3	5000×500×500	20	4	0.8020	2084.83
						Lower layer beam 5	12000×500×500	20	2	0.6394	1662.67
Lower longitudinal bar 62	4000×500×200	20	4	0.4340	1128.86
						Small-bore UHPC pipe 11	r＝200,l＝1000	20		0.3968	332.06
Large-diameter UHPC pipe 12	r＝600,l＝1500	25		0.3346	300.69
						Total weight of structure					21724.4

From table 1, the total weight of the structure is 21724.4kg, and from fig. 1-7, the displacement of the structure is 34280kg, which can be calculated to provide a net buoyancy of 34280-21724.4-12555.6 kg. Therefore, the structure is in a floating state in water and has a considerable bearing capacity. In the actual production process, certain loads such as net clothes of the net cage, manual activities and the like can be borne, and compared with the traditional fence type net cage, the application range and the bearing capacity of the net cage are more superior.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which can be directly or indirectly applied to other related technical fields without departing from the spirit of the present invention, are intended to be included in the scope of the present invention.

Claims

1. A prefabricated UHPC fish farm cage, characterized in that it comprises an upper-layer floating frame, a lower-layer counterweight frame, and a hollow vertical pipe (1) connecting the two, and the upper-layer floating frame comprises a Several hollow boxes (2) and several upper-layer beams (3), the upper-layer floating frame is provided with several transverse upper-layer tensioning tunnels (41), and each upper-layer tensioning tunnel (41) is provided with Prestressed tendons (42), both ends of the upper floating frame are provided with upper-layer prestressed tendon anchors (43) for tightening the prestressed tendons (42), and inside the hollow box (2) The interior of the hollow vertical pipe (1) and the hollow standpipe (1) are filled with light fillers, and the lower counterweight frame includes a plurality of lower beams (5) and a plurality of lower longitudinal members (6) assembled into a frame structure. The heavy frame is provided with a number of transverse lower-layer tensioning tunnels (71), each of the lower-layer tensioning tunnels (71) is provided with prestressed ribs (42), and both ends of the lower counterweight frame are provided with The lower-layer prestressed tendon anchor (72) tightened by the prestressed tendon (42).

2. The prefabricated UHPC fish farm cage according to claim 1, wherein each hollow box (2) is arranged at intervals in a row, and every two adjacent hollow boxes (2) pass through several upper layers Beams (3) are connected, and the upper-layer tensioning tunnel (41) includes a first hole segment (411) arranged in the hollow box (2) and a second hole arranged in the upper-layer beam (3) segment (412).

3. The prefabricated UHPC fish farm cage according to claim 2, wherein the upper beam (3) comprises a plurality of hollow sections (31) and a plurality of solid sections (32) arranged in a staggered manner, and the hollow sections (31) The interior is filled with light-weight filling material, the solid section (32) is provided with a first insertion hole (301), and the hollow vertical pipe (1) includes a small-diameter UHPC pipe (11), the small-diameter UHPC pipe (11). The upper end of the UHPC pipe (11) is plug-fitted with the first insertion hole (301), and the two are fixed by sealant.

4. The prefabricated UHPC fish farm cage according to claim 3, wherein the lower beam (5) is provided with a second jack (501) corresponding to the first jack (301), The lower end of the small-diameter UHPC pipe (11) is inserted and matched with the second insertion hole (501), and the two are fixed by sealant.

5. The prefabricated UHPC fish farm cage according to claim 2, wherein the lower longitudinal member (6) comprises a solid bottom plate (61) located at both ends of the lower counterweight structure, and all lower beams (5) ) are connected between two solid bottom plates (61).

6. The prefabricated UHPC fish farm cage according to claim 5, characterized in that, the lower tension tunnel (71) comprises a third hole segment (711) arranged in the solid bottom plate (61) and a fourth hole section (712) arranged in the lower beam (5).

7. The prefabricated UHPC fish farm cage according to claim 5, wherein the number of the lower beams (5) is 2, and the lower longitudinal members (6) also include two lower beams connected to the lower layers. The lower longitudinal bars (62) between the beams (5).

8. The prefabricated UHPC fish farm cage according to claim 5, characterized in that, the hollow boxes (2) located at both ends of the upper floating frame are end boxes, and the hollow standpipes (1) Includes large diameter UHPC pipe (12) connected between a solid base plate (61) and a corresponding end box.

9. a construction method of prefabricated UHPC fish farm cage, for building the prefabricated UHPC fish farm cage as claimed in claim 6, is characterized in that, comprises the following steps:

S1, making accessories, respectively making the hollow box (2), the upper beam (3), the hollow vertical pipe (1), the lower beam (5), and the lower longitudinal piece (6);

S2. Assemble and form the upper floating structure, arrange the hollow boxes (2) in a row at intervals, and install the upper beams (3) between the adjacent hollow boxes (2), so that the first layer in the hollow box (2) A hole section (411) is aligned with the second hole section (412) in the upper beam (3) to form a plurality of upper layer tensioning channels (41), and then prestressing force is inserted into each upper layer tensioning channel (41) Tensioning the prestressing tendons (42) using the upper prestressing tendon anchors (43), tightening the prestressing tendons (42), and then pouring cement slurry into the upper tensioning tunnel (41) , so that the prestressed tendons (42), the upper beam (3), and the hollow box (2) form a whole;

S3. Assemble and form the lower counterweight structure, and install all the lower beams (5) between the two solid bottom plates (61), so that the third hole section (711) in the solid bottom plate (61) and the lower beam (5) The fourth hole section (712) in ) is aligned to form several lower tensioning tunnels (71), and then the prestressing tendons (42) are inserted into each lower tensioning tunnel (71), and the lower prestressing tendons are used as anchors. The tool (72) stretches these prestressed tendons (42), tightens the prestressed tendons (42), and then pours cement slurry into the lower tensioning tunnel (71) to make the prestressed tendons (42) and the lower beams (5), the solid bottom plate (61) constitutes a whole;

S4. Assembling the upper and lower layers, the hollow vertical pipe (1) includes a small-diameter UHPC pipe (11) and a large-diameter UHPC pipe (12), and the upper-layer beam (3) and the lower-layer beam (5) are connected by the small-diameter UHPC pipe (11). ), and connect the solid bottom plate (61) to the corresponding hollow box body (2) through the large-diameter UHPC pipe (12).

10. The method for constructing prefabricated UHPC fish farm cages according to claim 9, characterized in that, after step S4 is performed, step S5 is performed, and the joints of all parts are sealed and fixed by means of grouting or glue injection Knot.