CN216292625U - Prefabricated UHPC (ultra high performance polycarbonate) fishing ground net cage - Google Patents

Abstract

The utility model discloses a prefabricated UHPC (ultra high Performance Poly carbonate) fishing ground net cage which comprises an upper floating frame, a lower counterweight frame and a hollow vertical pipe connecting the upper floating frame and the lower counterweight frame, wherein the upper floating frame is provided with a plurality of transverse upper tensioning holes, a prestressed tendon is penetrated in each upper tensioning hole, both ends of the upper floating frame are provided with upper prestressed tendon anchors for tensioning the prestressed tendon, the lower counterweight frame is provided with a plurality of transverse lower tensioning holes, a prestressed tendon is penetrated in each lower tensioning hole, and both ends of the lower counterweight frame are provided with lower prestressed tendon anchors for tensioning the prestressed tendon. The UHPC fishing ground net cage disclosed by the utility model is reasonable in structure, strong in resistance to sea wave impact and good in stability.

Description

Prefabricated UHPC fish farm cage

technical field

The utility model belongs to the technical field of marine engineering facilities, in particular to a prefabricated and assembled UHPC fish farm cage.

Background technique

With the decline of fishery resources, marine fishery has changed from fishing to aquaculture, and the aquaculture area has also shifted from land to ocean, and has gradually expanded from offshore harbors to deep water and deep sea. Marine cage aquaculture is aquaculture. One of the important forms of activities, the current fishery cages are mainly made of steel materials, and it is extremely rare to use cement-based materials to build cages. When using traditional steel structures, there are still serious corrosion problems in the marine environment and high maintenance costs, which affect the sustainable development of offshore fishing grounds.

With the continuous deepening of research and application of ultra-high performance concrete (UHPC) materials, its superiority as a marine floating structure has gradually emerged. Compared with the traditional steel structure, the structure with UHPC as the main material has the characteristics of high strength and high toughness, and also has stronger resistance to the erosion reaction of seawater in the marine environment. It has a wide range of application prospects as a structural material for fish farm cages. .

Chinese Patent Publication No. CN 112722178 A discloses an anti-sway type UHPC pipe-box combined floating structure and its construction method. The pipe connection, through the optimized configuration of the buoyancy and weight of the structure, makes the main lifting stress concentrated near the water surface, and surrounds the edge of the structure, while minimizing the center of gravity. The structure has the functions of floating, bearing and anti-rolling. However, in this UHPC tube-box combined floating structure, the annular floating box constitutes the entire superstructure. Under the circumstance that the usage of UHPC materials is limited, the length and width of the constructed floating structure are relatively small and cost-effective.

At the same time, the Chinese Patent Publication No. CN 111846131 A also discloses an assembled UHPC pipe-box combined floating structure and its construction method. This UHPC pipe-box combined floating structure consists of several prefabricated small and medium UHPC The wall box body, connecting sleeve and UHPC pipe are assembled. The pipe-box combination has stable structure, various forms and strong corrosion resistance. It can form a single-layer shallow draft floating platform, and can form a two-layer or multi-layer semi-submersible platform. It is a skeleton structure platform with broad redevelopment potential and application prospects. Compared with the above-mentioned anti-sway UHPC tube-box combined floating structure, under the circumstance that the usage amount of UHPC material is limited, the built floating structure has larger length and width and higher cost performance. However, such a floating structure also has the following problems. In each layer of the floating structure, the hollow box and the UHPC pipe are connected by plugging, the longitudinal connection strength is low, and the resistance to wave impact in the marine environment is poor. .

Utility model content

In view of this, the purpose of the present utility model is to provide a prefabricated UHPC fish farm cage with reasonable structure, strong resistance to wave impact and good stability.

The technical scheme that the utility model adopts for solving its technical problem is:

A prefabricated UHPC fish farm cage, comprising an upper floating frame, a lower counterweight frame, and a hollow standpipe connecting the two, the upper floating frame includes a plurality of hollow boxes assembled into a frame structure and a plurality of upper layers Beam, the upper layer floating frame is provided with several transverse upper layer tensioning tunnels, each upper layer tensioning tunnel is provided with prestressed tendons, and both ends of the upper layer floating frame are provided with the prestressed tendons. The tensioned upper-layer prestressed tendon anchorage, the interior of the hollow box body and the interior of the hollow standpipe are filled with light fillers, and the lower-layer counterweight frame includes several lower-layer beams assembled into a frame structure and several The lower-layer longitudinal piece, the lower-layer counterweight frame is provided with several transverse lower-layer tensioning tunnels, each of the lower-layer tensioning tunnels is provided with prestressed ribs, and both ends of the lower-level counterweight frame are provided with all the tensioning tunnels. The lower prestressed tendon anchorage is tightened by the prestressed tendon.

In a preferred solution of the present invention, each hollow box is arranged in a row at intervals, and every two adjacent hollow boxes are connected by a plurality of upper-layer beams, and the upper-layer tensioning tunnel comprises A first hole section in the body and a second hole section arranged in the upper beam.

In a preferred solution of the present invention, the upper beam and the hollow box body are plugged, and the plug joints of the two are consolidated by sealant.

In a preferred solution of the present utility model, the upper beam includes a plurality of hollow sections and a plurality of solid sections arranged in a staggered manner, the hollow sections are filled with light-weight filling materials, and the solid sections are provided with first insertion holes, The hollow vertical pipe includes a small-diameter UHPC pipe, and the upper end of the small-diameter UHPC pipe is inserted and fitted with the first socket, and the two are fixed by sealant.

In a preferred solution of the present invention, the lower beam and the lower longitudinal member are solid UHPC rods, the lower beam is provided with a second socket corresponding to the first socket, and the small-diameter UHPC pipe is provided with a second socket corresponding to the first socket. The lower end of the socket is inserted and matched with the second socket, and the two are fixed by sealant.

In a preferred solution of the present utility model, the upper-layer tension pipes arranged along the length direction of the upper-layer beams are pre-embedded, and the upper-layer tension pipes pass through all the hollow sections and solid sections in sequence, and the upper-layer tension pipes The inner hole constitutes the above-mentioned second hole segment.

In a preferred solution of the present utility model, the lower-layer longitudinal members include solid bottom plates respectively located at both ends of the lower-layer counterweight structure, all the lower-layer beams are connected between the two solid bottom plates, and the lower-layer prestressed tendons are anchored The tool is arranged on the outer side of the solid bottom plate.

In a preferred solution of the present invention, the lower tension tunnel comprises a third hole section arranged in the solid bottom plate and a fourth hole section arranged in the lower beam.

In a preferred solution of the present invention, the lower-layer tension pipes arranged along the length direction thereof are pre-embedded in the lower-layer beams, and the inner holes of the lower-layer tension pipes constitute the above-mentioned fourth hole section.

In a preferred solution of the present invention, the number of the lower beams is 2, and the lower longitudinal member further includes a lower longitudinal rod connected between the two lower beams.

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

In a preferred solution of the present invention, the number of hollow boxes is 3 or more, the hollow boxes located at both ends of the upper floating frame are end boxes, and the hollow boxes located between the two end boxes are The box body is a middle box body, the upper layer prestressed tendon anchorage is arranged on the outer side of the end box body, and the hollow vertical pipe includes a large vertical pipe connected between the solid bottom plate and the corresponding end box body. Caliber UHPC pipe.

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

A method for constructing a prefabricated UHPC fish farm cage, which is used to construct the prefabricated UHPC fish farm cage as described above, comprising the following steps:

S1. Make accessories, respectively make the hollow box, the upper beam, the hollow vertical pipe, the lower beam, and the lower longitudinal piece;

S2. Assemble the upper floating structure, arrange the hollow boxes in a row at intervals, and install the upper beam between the adjacent hollow boxes, so that the first hole section in the hollow box and the second hole section in the upper beam are aligned , constitute a number of upper tension tunnels, and then penetrate the prestressed tendons in each upper tension tunnel, use the upper prestressed tendon anchors to tension these prestressed tendons, and tighten the prestressed tendons. Cement slurry is poured into the tension tunnel, so that the prestressed tendons, the upper beam and the hollow box form a whole;

S3. Assemble and form the lower layer counterweight structure, install all the lower layer beams between the two solid bottom plates, and align the third hole section in the solid bottom plate with the fourth hole section in the lower layer beam to form a number of lower layer tensioning Then, the prestressed tendons are inserted into each lower tensioning channel, and these prestressed tendons are tensioned with the lower prestressed tendon anchors, and the prestressed tendons are tightened, and then the lower tensioning channel is filled with cement slurry. , so that the prestressed tendons, the lower beams and the solid bottom plate form a whole;

S4. Assemble the upper and lower layers. The hollow vertical pipe includes a small-diameter UHPC pipe and a large-diameter UHPC pipe. The upper-layer beam and the lower-layer beam are connected through the small-diameter UHPC pipe, and the solid bottom plate and the corresponding hollow box are connected through the large-diameter UHPC pipe. .

In a preferred solution of the present invention, after step S4 is performed, step S5 is performed, and the joints of all components are sealed and consolidated by means of grouting or glue injection.

The beneficial effects of the present utility model are:

1. The utility model adopts UHPC material prefabricated upper floating frame, lower counterweight frame, and hollow standpipe to assemble, the upper floating frame is assembled from a hollow box body and an upper beam, and the lower counterweight frame is composed of a lower beam, The solid bottom plate and the lower longitudinal rod are assembled to ensure the reasonable force 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 formed, the prestressing tendons in the upper tensioning tunnel are tightened by the upper prestressing tendon anchorage, and the prestressing in the lower tensioning tunnel is tightened by the lower prestressing tendon anchorage. Tensioning the tendons can enhance the lateral strength and stiffness of the overall structure.

3. The main structural material of the cage structure of the present utility model is UHPC, which has high strength, good toughness, and has a series of excellent properties such as corrosion resistance and impact resistance; there are a large number of cavities in the hollow vertical pipe and the hollow box body, which can be used for The structure provides sufficient buoyancy; the cavity is filled with lightweight filling material, which can maintain the original working condition in the case of defects such as cracks on the surface of the structure.

4. The UHPC components used in this structure are all prefabricated in factories. Compared with traditional cages, their quality can be better controlled and materials can be saved; the construction strength can be reduced and the overall construction period of the structure manufacturing can be shortened, which is more conducive to popularization and use; Reduce the maintenance cost of the cage and prolong the service life of the cage.

Description of drawings

Fig. 1 is the structural representation of the present utility model;

Fig. 2 is the front view of the present utility model;

Figure 3 is a schematic diagram of the connection structure of the end box and the upper beam;

Figure 4 is a schematic diagram of the connection structure of the middle box and the upper beam;

5 is a schematic diagram of the connection structure of the solid bottom plate and the lower beam;

Fig. 6 is the structural representation of the upper beam;

FIG. 7 is a schematic diagram of the connection structure of the lower longitudinal bar and the lower transverse beam.

Detailed ways

The technical solutions 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 directional indications (such as up, down, left, right, front, rear...) in the embodiments of the present invention are only used to explain the relationship between various components under a certain posture (as shown in the accompanying drawings). The relative positional relationship, the movement situation, etc., if the specific posture changes, the directional indication also changes accordingly. In addition, the descriptions involving "preferred", "second preferred", etc. in the present invention are only for descriptive purposes, and should not be construed as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "preferred" or "less preferred" may expressly or implicitly include at least one of that feature.

1 to 7 , a prefabricated UHPC fish farm cage includes an upper floating frame, a lower counterweight frame, and a hollow riser 1 connecting the two.

The upper floating frame includes a plurality of hollow boxes 2 and a plurality of upper beams 3 assembled into a frame structure, the hollow box 2 has a box cavity 202 inside, and the upper floating frame is provided with a plurality of transverse upper layer tensioning tunnels 41, Each upper layer tensioning tunnel 41 is provided with prestressed tendons 42 , both ends of the upper layer floating frame are provided with upper layer prestressed tendon anchors 43 for tightening the prestressed tendons 42 . The interior of the standpipe 1 is filled with lightweight fillers such as foam, such as polystyrene or polyurethane foam.

The lower counterweight frame includes a number of lower beams 5 and a number of lower longitudinal members 6 assembled into a frame structure. The lower counterweight frame is provided with a number of transverse lower tension tunnels 71, and each of the lower tension tunnels 71 are drilled through. There are prestressed tendons 42 , and both ends of the lower counterweight frame are provided with lower prestressed tendon anchors 72 for tightening the prestressed tendons 42 .

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

After the upper floating frame and the lower counterweight frame are assembled and formed, the prestressed tendons 42 in the upper tensioning tunnel 41 are tightened by the upper prestressed tendon anchors 43 , and the lower tensioning tunnel 71 is tightened by the lower prestressed tendon anchors 72 . The prestressed tendons 42 are tightened, which can enhance the lateral strength and rigidity of the overall structure.

1 and 2, in a preferred solution of the present invention, each hollow box body 2 is arranged in a row at intervals, and every two adjacent hollow box bodies 2 are connected by several upper beams 3, and the upper layer is tensioned The hole 41 includes a first hole section 411 arranged in the hollow box 2 and a second hole section 412 arranged in the upper beam 3 .

The upper beam 3 is plugged with the hollow box body 2, and the plug joints of the two are consolidated by sealant. Specifically, the hollow box body 2 is provided with a horizontal insertion hole 203 , and the end of the upper beam 3 is provided with a plug-in block that is inserted and matched with the insertion hole 203 .

As a further improvement of the present invention, the upper beam 3 includes a plurality of hollow sections 31 and a plurality of solid sections 32 arranged in a staggered manner, the hollow section 31 is filled with lightweight filling materials such as foam plastic, and the solid section 32 is provided with a first insertion hole 301, The hollow standpipe 1 includes a small-diameter UHPC pipe 11 , and the upper end of the small-diameter UHPC pipe 11 is inserted and fitted with the first insertion hole 301 and the two are fixed by a sealant. There are pre-embedded upper-layer tension pipes arranged along its length direction in the upper-layer beam 3, and the upper-layer tension pipes pass through all the hollow sections 31 and the solid sections 32 in turn, and the inner holes of the upper-layer tension pipes constitute the above-mentioned second holes. Section 412.

The lower beam 5 is a solid UHPC beam, and the lower beam 5 is provided with a second insertion hole 501 corresponding to the first insertion hole 301, and the lower end of the small-diameter UHPC pipe 11 is inserted and matched with the second insertion hole 501 and passes between the two. Sealant consolidation.

Further, the lower layer longitudinal member 6 also includes solid bottom plates 61 respectively located at both 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 tendons 72 are arranged on the outer side of the solid bottom plate 61. department. Preferably, the solid bottom plate 61 is provided with an insertion hole 612, and the end of the lower beam 5 is inserted into the insertion hole 612 and the two are fixed by sealant.

1 and 2 , in a preferred solution of the present invention, the lower tension tunnel 71 includes a third hole segment 711 arranged in the solid bottom plate 61 and a fourth hole segment 712 arranged in the lower beam 5 . Specifically, the lower-layer tension pipes arranged along the length direction of the lower-layer beams 5 are pre-embedded, and the inner holes of the lower-layer tension pipes constitute the above-mentioned fourth hole section 712 .

Referring to FIG. 1 , the number of lower beams 5 is generally set to two, and the lower longitudinal member 6 further includes a lower longitudinal rod 62 connected between the two lower beams 5 .

The lower beam 5 is provided with sockets 502 corresponding to the lower longitudinal rods 62, and the two ends of the lower longitudinal rods 62 are respectively inserted into the sockets 502 of the two lower beams 5 to strengthen the longitudinal strength and rigidity of the lower counterweight frame. . On the lower beam 5, the insertion position of the lower longitudinal member 6 should be staggered from the insertion position of the small-diameter UHPC pipe 11 to avoid the occurrence of weak stress.

The number of hollow boxes 2 is 2 or more, and the number of hollow boxes 2 is 3 or more. The hollow boxes 2 located at both ends of the upper floating frame are end boxes, located between the two end boxes. The hollow box 2 is the middle box, and the upper prestressed tendon anchors 43 are arranged on the outer side of the end box. When the number of hollow boxes 2 is 2, the two hollow boxes 2 are located on the upper floating frame. Both ends are end boxes.

Further, the hollow standpipe 1 also includes a large-diameter UHPC pipe 12 connected between the solid bottom plate 61 and the corresponding end box. The lower surface of the end box body and the upper surface of the solid bottom plate 61 are provided with a jack 202 slightly larger than the large-diameter UHPC pipe 12, and the upper end of the large-diameter UHPC pipe 12 is inserted into the jack 202 on the lower surface of the end box body. The lower end of the UHPC pipe 12 is inserted into the insertion hole 611 on the upper surface of the solid bottom plate 61 to connect the end box body and the solid bottom plate 61 . The splices are fixed by sealant.

The average density of the entire fabricated UHPC fish farm cage needs to be less than that of seawater, so that the fabricated UHPC fish farm cage can float in seawater. The average density of the upper floating frame should be lower than the average density of the lower counterweight frame. Generally, the solid bottom plate 61, the lower beam 5, and the lower longitudinal rod 62 of the lower counterweight frame are set as solid structures to lower the center of gravity and strengthen the cage. The ability to adapt to various working conditions in the complex marine environment can reduce the shaking amplitude and prevent overturning under the impact of waves.

A construction method for constructing the above-mentioned prefabricated UHPC fish farm cage, comprising the following steps:

S1, make accessories, respectively make the hollow box 2, the upper beam 3, the large-diameter UHPC pipe 12, the small-diameter UHPC pipe 11, the lower beam 5, and the lower longitudinal rod 62 and the solid bottom plate 61;

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 hole section 411 in the hollow box 2 and the upper beam 3 The second hole sections 412 in the inner layer are aligned to form several upper-layer tensioning channels 41, and then the prestressing ribs 42 are penetrated into each upper-layer tensioning channel 41, and the prestressing ribs 42 are carried out by using the upper-layer prestressing tendon anchors 43. Tension, tighten the prestressed tendons 42, and then pour 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 the lower layer counterweight structure, connect all the lower layer beams 5 together through the lower layer longitudinal rods 62, and install all the lower layer beams 5 between the two solid bottom plates 61, so that the third layer in the solid bottom plate 61 is installed. The hole section 711 is aligned with the fourth hole section 712 in the lower beam 5 to form a number of lower tension tunnels 71, and then the prestressed tendons 42 are inserted into each lower tensile tunnel 71, and the lower prestressed tendon anchors 72 are used. These prestressed tendons 42 are stretched, the prestressed tendons 42 are tensioned, and then cement slurry is poured into the lower tensioning tunnel 71, so that the prestressed tendons 42, the lower beam 5, and the solid bottom plate 61 form a whole;

S4. Assemble the upper and lower layers, connect the upper beam 3 and the lower beam 5 through the small-diameter UHPC pipe 11, and connect the solid bottom plate 61 to the corresponding hollow box 2 through the large-diameter UHPC pipe 12.

S5. Use grouting or glue injection to seal and consolidate the joints of all parts.

In the above-mentioned step S1, the method of making the hollow box body 2, the upper beam 3, the large-diameter UHPC pipe 12, and the small-diameter UHPC pipe 11 is as follows: first, a high-strength and high-toughness cement-based composite material is used to make the hollow box body 2, the upper-layer beam 3, the large The embryos of the UHPC tube 12 with a small diameter and the UHPC tube 11 with a small diameter are injected into the hollow box 2, the upper beam 3, the large diameter UHPC tube 12, and the small diameter UHPC tube 11. Filler, and then the filling port into which the lightweight filler is injected is closed.

For the above five steps, S1 is implemented first, S2 and S3 can be implemented simultaneously, or S2 can be implemented first, or S3 can be implemented first, after S2 and S3 are completed, S4 is implemented, and finally S5 is implemented.

Example 1

The prefabricated UHPC fish farm cage provided in this example consists of a hollow box 2, an upper beam 3, a large-diameter UHPC pipe 12, a small-diameter UHPC pipe 11, a lower beam 5, a lower longitudinal rod 62 and a solid bottom plate 61. made.

In this example, the size of the hollow box 2 is 5000×2000×500mm, the thickness of the side wall is 30mm, the box cavity 202 is located in the center of the box, and the size is 2500×1500×400mm. The jack has a radius of 600mm and a height of 400mm. The size of the solid bottom plate 61 is 5000×2000×200mm, and a vertical jack with the same radius and the same radius as the position of the hollow box 2 is provided inside, and the height is 100mm. The size of the upper beam 3 is 5000×500×500mm, the size of the lower beam 5 is 12000×500×500mm, and the size of the lower longitudinal bar 62 is 4000×500×200mm. The radius of the large-diameter UHPC pipe 12 is 600mm and the height is 1000mm; the radius of the small-diameter UHPC pipe 11 is 200mm and the height is 1000mm. Combined with the dimensions of each component, the overall length of the structure is 16m, the width is 5m, and the overall length-width ratio is about 3:1. See Table 1 for specific parameters.

Table 1 Dimensions and parameters of prefabricated UHPC cages

name L×W×H/mm Wall thickness/mm amount Volume/m³ Mass/kg Hollow box 2 5000×2000×500 30 3 2.3496 6109.09 Box cavity 202 2500×1500×400 3 4.5000 0 Solid Bottom Plate 61 5000×2000×200 2 3.8870 10106.2 upper beam 3 5000×500×500 20 4 0.8020 2084.83 Lower 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 diameter 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 the structure 21724.4

From Table 1, the total weight of the structure is 21724.4kg. According to Figure 1-7, the displacement of the structure can be calculated as 34280kg, and the net buoyancy provided by the structure is 34280-21724.4=12555.6kg. Therefore, the structure is in a floating state in water and has a considerable bearing capacity. In the actual production process, it can withstand certain loads such as cage nets and artificial activities. Compared with traditional fenced cages, its application range and bearing capacity are more superior.

The above are only the preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model patent. Any equivalent structure transformation made by using the contents of the present utility model description and drawings under the concept of the present utility model, or directly Or indirectly used in other related technical fields are included in the scope of patent protection of the present invention.

Claims (10)

1. A prefabricated UHPC (ultra high performance concrete) fishing ground net cage is characterized by comprising an upper floating frame, a lower counterweight frame and a hollow vertical pipe (1) connecting the upper floating frame and the lower counterweight frame, wherein the upper floating frame comprises a plurality of hollow box bodies (2) and a plurality of upper beams (3) which are assembled into a frame structure, the upper floating frame is provided with a plurality of transverse upper tensioning channels (41), each upper tensioning channel (41) is internally provided with a prestressed tendon (42) in a penetrating manner, two ends of the upper floating frame are respectively provided with an upper prestressed tendon anchorage device (43) which tensions the prestressed tendon (42), the interior of each hollow box body (2) and the interior of each hollow vertical pipe (1) are filled with light fillers, the lower counterweight frame comprises a plurality of lower beams (5) and a plurality of lower longitudinal pieces (6) which are assembled into the frame structure, the lower floor counter weight frame is provided with a plurality of horizontal lower floor stretch-draw pore canals (71), all wears to be equipped with prestressing tendons (42) in every lower floor stretch-draw pore canal (71), the both ends of lower floor counter weight frame all are provided with the taut lower floor prestressing tendons ground tackle (72) of prestressing tendons (42).

2. The prefabricated UHPC fishery cage according to claim 1, wherein each hollow box body (2) is arranged at intervals in a row, every two adjacent hollow box bodies (2) are connected by a plurality of upper-layer cross beams (3), and the upper-layer tension hole channel (41) comprises a first hole section (411) arranged in the hollow box body (2) and a second hole section (412) arranged in the upper-layer cross beam (3).

3. The prefabricated UHPC fishing ground net cage according to claim 2, wherein the upper layer beam (3) comprises a plurality of hollow sections (31) and a plurality of solid sections (32) which are arranged in a staggered mode, light filling materials are filled in the hollow sections (31), the solid sections (32) are provided with first jacks (301), the hollow vertical pipe (1) comprises a small-caliber UHPC pipe (11), the upper end portion of the small-caliber UHPC pipe (11) is in plug fit with the first jacks (301), and the small-caliber UHPC pipe and the first jacks are fixedly connected through sealing glue.

4. The prefabricated UHPC fishery net cage according to claim 3, wherein the lower layer cross beam (5) is provided with a second insertion hole (501) corresponding to the first insertion hole (301), and the lower end part of the small-caliber UHPC pipe (11) is in splicing fit with the second insertion hole (501) and is fixedly connected with the second insertion hole through a sealant.

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

6. The prefabricated UHPC fishery cage according to claim 5, wherein said lower tensioned tunnel (71) comprises a third hole section (711) provided in said solid floor (61) and a fourth hole section (712) provided in said lower beam (5).

7. The prefabricated UHPC fishery cage according to claim 5, wherein the number of the lower layer beams (5) is 2, and the lower layer longitudinal member (6) further comprises a lower layer longitudinal rod (62) connected between the 2 lower layer beams (5).

8. Prefabricated UHPC fishery cage according to claim 5, wherein the hollow boxes (2) at both ends of the upper floating frame are end boxes, and the hollow risers (1) comprise large-diameter UHPC pipes (12) connected between a solid floor (61) and the corresponding end boxes.

9. The prefabricated UHPC fishery cage according to claim 8, wherein the upper end of the large-caliber UHPC pipe (12) is inserted into the end box body, and the lower end of the large-caliber UHPC pipe (12) is inserted into the solid bottom plate (61).

10. The prefabricated UHPC fishery net cage according to claim 2, wherein the upper layer beam (3) is spliced with the hollow box body (2) and the spliced part of the upper layer beam and the hollow box body is solidified through sealant.

Images