A semi-prefabricated bioreactor structure and its construction method

Abstract

This invention belongs to the field of building construction technology and discloses a semi-prefabricated bioreactor structure and its construction method. The bioreactor structure includes a cast-in-place base slab, side wall structures, and a top structure. Each prefabricated tank wall is secured between two adjacent first connecting reinforcing bars, and concrete is poured at the connection between the prefabricated tank wall and the first connecting reinforcing bars. A first gap is provided between two adjacent prefabricated tank walls, and concrete is poured into the first gap to complete the connection between the two adjacent prefabricated tank walls. A prefabricated main beam is erected on the side wall structure, and concrete is poured at the connection with the side wall structure. A prefabricated top slab connects the prefabricated main beam and the side wall structure. The bent modules of the two prefabricated top slabs and the prefabricated main beam enclose a casting cavity, into which concrete is poured to form a cast-in-place secondary beam. This bioreactor structure can reduce the amount of formwork erected at nodes, which is beneficial to accelerating construction efficiency; at the same time, it has high connection strength and good overall integrity.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a semi-prefabricated bioreactor structure and its construction method. Background Technology

[0002] With the increasing severity of water pollution and the continuous rise in urban water demand, sewage treatment plants have been built on a large scale, and sewage purification is carried out in biological reactors.

[0003] Existing bioreactor structures mostly use cast-in-place reinforced concrete, which results in long construction periods and significant pollution at the construction site. Among existing prefabricated assembly structures, prefabricated steel structures suffer from corrosion resistance, while prefabricated concrete structures present technical challenges such as complex joint formwork operations, complex main and secondary beam connection construction, and low construction efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a semi-assembled bioreactor structure and its construction method. This structure has strong corrosion resistance, is quick and convenient to construct, and can ensure the integrity and reliability of node connections.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] On the one hand, a semi-assembled bioreactor structure is provided, comprising:

[0007] A cast-in-place base slab, wherein a first connecting steel bar protrudes from the cast-in-place base slab;

[0008] The sidewall structure includes:

[0009] Multiple precast pool walls are spaced apart, and the bottom end of each precast pool wall is engaged between two adjacent first connecting steel bars. A first gap for pouring concrete is provided between two adjacent precast pool walls.

[0010] The cast-in-place pool wall is located at the corner of the side wall structure and connects the two precast pool walls.

[0011] Top structure, including:

[0012] The precast main beam is erected on the side wall structure, and concrete is poured at the connection with the side wall structure;

[0013] A precast top slab is connected between the precast main beam and the side wall structure. A bending module is provided on the bottom side of the precast top slab. Two precast top slabs are spaced apart on one side of the precast main beam. The bending modules on the two precast top slabs and the precast main beam enclose a casting cavity.

[0014] A cast-in-place secondary beam is installed inside the casting cavity, and the cast-in-place secondary beam connects the precast main beam and the side wall structure.

[0015] As an alternative to the semi-prefabricated bioreactor structure, a second connecting steel bar is provided on the side of the prefabricated tank wall located at the corner of the side wall structure. The second connecting steel bar is used to connect the cast-in-place tank wall.

[0016] As an optional solution for the semi-assembled bioreactor structure, the prefabricated tank wall is provided with a first groove on both sides, and the first groove extends in the vertical direction.

[0017] As an optional solution for the semi-assembled bioreactor structure, the top of the prefabricated tank wall is provided with first connecting parts on both sides, which are used to support the prefabricated main beam and the prefabricated top plate.

[0018] The bottom of the precast pool wall is provided with a second connecting part, which is engaged between two adjacent first connecting steel bars on the cast-in-place base plate.

[0019] As an optional structure for a semi-prefabricated bioreactor, the prefabricated top slab is provided with a third connecting steel bar protruding around its perimeter, and the third connecting steel bar is connected to the side wall structure and the prefabricated main beam.

[0020] As an optional structure for a semi-prefabricated bioreactor, the upper end of the prefabricated main beam is provided with a fourth connecting steel bar, which is used to connect with the third connecting steel bar.

[0021] The precast main beam has fifth connecting steel bars protruding from both ends along its length, and the fifth connecting steel bars are connected to the side wall structure.

[0022] As an optional structure for a semi-prefabricated bioreactor, the precast main beam has a roughened area on its side wall, and one end of the cast-in-place secondary beam is connected to the roughened area.

[0023] As an optional structure for a semi-assembled bioreactor, the prefabricated main beam has a second groove at both ends along its length, and the second groove is spaced out in multiple places along the vertical direction.

[0024] As an optional structure for a semi-prefabricated bioreactor, the prefabricated tank wall, the prefabricated main beam, and the upper surface of the prefabricated top plate are all provided with lifting rods.

[0025] On the other hand, a construction method for a semi-prefabricated bioreactor structure is provided, applicable to the aforementioned semi-prefabricated bioreactor structure, comprising the following steps:

[0026] S1: Tie the reinforcing bars of the cast-in-place base slab and secure the multiple precast pool walls between two adjacent first connecting reinforcing bars;

[0027] S2: Concrete is poured between the precast pool wall and the cast-in-place base slab, and between two adjacent precast pool walls, to connect the side wall structure to the cast-in-place base slab;

[0028] S3: Erect the precast main beam on the side wall structure, then erect the precast top slab between the precast main beam and the side wall structure, and pour concrete at the connection point;

[0029] S4: A casting cavity is formed between two precast top plates spaced apart on one side of the precast main beam. Concrete is poured into the casting cavity to form the cast-in-place secondary beam.

[0030] The beneficial effects of this invention are:

[0031] This invention provides a semi-prefabricated bioreactor structure, including a cast-in-place base slab, sidewall structures, and a top structure. The cast-in-place base slab has a protruding first connecting steel bar. The sidewall structure includes a cast-in-place tank wall and multiple precast tank walls spaced apart. Each precast tank wall is secured between two adjacent first connecting steel bars, and concrete is poured at the connection between the precast tank wall and the first connecting steel bars. A first gap is provided between two adjacent precast tank walls, and concrete is poured into the first gap to connect the two adjacent precast tank walls. The top structure includes a precast main beam, a precast top slab, and cast-in-place secondary beams. The precast main beam is erected on the sidewall structure, and concrete is poured at the connection between the precast main beam and the sidewall structure. The precast top slab connects the precast main beam and the sidewall structure. A bending module is provided on the bottom side of the precast top slab. Two precast top slabs are spaced apart on one side of the precast main beam. The bending modules of the two precast top slabs and the precast main beam enclose a casting cavity, into which concrete is poured to form the cast-in-place secondary beams. The bioreactor adopts a semi-prefabricated structure, which reduces the amount of formwork required for nodes and helps to speed up construction efficiency; at the same time, the structure has high connection strength and good overall integrity. Attached Figure Description

[0032] Figure 1 This is a top view of the semi-assembled bioreactor structure provided in the specific embodiments of the present invention;

[0033] Figure 2 yes Figure 1 AA section view in the middle;

[0034] Figure 3 yes Figure 1 BB section view in the middle;

[0035] Figure 4This is an overall structural diagram of the prefabricated pool wall provided in a specific embodiment of the present invention;

[0036] Figure 5 This is a front view of the prefabricated pool wall provided in a specific embodiment of the present invention;

[0037] Figure 6 This is a partial cross-sectional view of the sidewall structure provided in a specific embodiment of the present invention;

[0038] Figure 7 This is a structural schematic diagram of the connection between the precast pool wall and the cast-in-place base slab provided in a specific embodiment of the present invention;

[0039] Figure 8 This is an overall structural diagram of the prefabricated main beam provided in a specific embodiment of the present invention;

[0040] Figure 9 This is a top view of the precast roof slab provided in the specific embodiments of the present invention;

[0041] Figure 10 This is a structural schematic diagram of the precast main beam, precast top slab, and precast pool wall connection before concrete pouring, provided in a specific embodiment of the present invention.

[0042] Figure 11 This is a schematic diagram of the structure after concrete has been poured at the connection between the precast main beam, precast top slab, and precast pool wall, as provided in a specific embodiment of the present invention.

[0043] In the picture:

[0044] 1. Cast-in-place base slab; 11. First connecting reinforcement;

[0045] 2. Sidewall structure;

[0046] 21. Precast pool wall; 211. Second connecting steel bar; 212. First groove; 213. First connecting part; 214. Second connecting part; 215. Sixth connecting steel bar;

[0047] 22. Cast-in-place pool walls;

[0048] 3. Top structure;

[0049] 31. Precast main beam; 311. Fourth connecting reinforcement bar; 312. Fifth connecting reinforcement bar; 313. Roughened area; 314. Second groove; 315. Hanging bar;

[0050] 32. Precast roof slab; 321. Bending module; 322. Third connecting reinforcement; 323. Grouting hole;

[0051] 33. Cast-in-place secondary beams. Detailed Implementation

[0052] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0053] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0054] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0055] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0056] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0057] like Figures 1 to 11As shown, this embodiment provides a semi-prefabricated bioreactor structure, including a cast-in-place base slab 1, side wall structures 2, and a top structure 3. The cast-in-place base slab 1 has a protruding first connecting steel bar 11. The side wall structure 2 includes a cast-in-place tank wall 22 and multiple prefabricated tank walls 21 spaced apart. Each prefabricated tank wall 21 is fitted between two adjacent first connecting steel bars 11, and concrete is poured at the connection between the prefabricated tank wall 21 and the first connecting steel bar 11. A first gap is provided between two adjacent prefabricated tank walls 21, and concrete is poured into the first gap to complete the connection between the two adjacent prefabricated tank walls 21. The top structure 3 includes a precast main beam 31, a precast top slab 32, and cast-in-place secondary beams 33. The precast main beam 31 is erected on the side wall structure 2, and concrete is poured at the connection between the precast main beam 31 and the side wall structure 2. The precast top slab 32 is connected between the precast main beam 31 and the side wall structure 2. A bending module 321 is provided on the bottom side of the precast top slab 32. Two precast top slabs 32 are spaced apart on one side of the precast main beam 31. The bending modules 321 of the two precast top slabs 32 and the precast main beam 31 enclose a casting cavity. Concrete is poured into the casting cavity to form the cast-in-place secondary beams 33. This bioreactor structure adopts a semi-prefabricated structure, which can reduce the amount of formwork erection at nodes and help speed up construction efficiency. At the same time, the connection strength of this reactor structure is high, and it has good overall integrity.

[0058] Specifically, the concrete poured in this embodiment is UHPC high-performance concrete, which has high strength and excellent durability, ensuring the connection strength at the joints and thus improving the overall integrity of the bioreactor structure.

[0059] For example, in this embodiment, the sidewall structure 2 is quadrilateral; in other embodiments, the sidewall structure 2 may also be other shapes.

[0060] Optionally, combined Figures 1 to 6 As shown, a plurality of second connecting steel bars 211 protrude from the side of the precast pool wall 21 located at the corner of the side wall structure 2. The second connecting steel bars 211 are used to connect the cast-in-place pool wall 22. That is, by connecting the two second connecting steel bars 211 protruding from the precast side walls at the corner, and then pouring concrete, the cast-in-place pool wall 22 can be formed.

[0061] Specifically, the end of the second connecting steel bar 211 away from the precast pool wall 21 is bent to strengthen the connection between the precast pool wall 21 and the cast-in-place pool wall 22.

[0062] Furthermore, referring to Figure 4 Both sides of the precast pool wall 21 are provided with a first groove 212, which extends vertically. Figure 6A first gap is provided between two adjacent precast pool walls 21, and concrete is poured into the first gap to connect the two adjacent precast pool walls 21. The provision of the first groove 212 can strengthen the connection strength between the two precast pool walls 21, thereby improving the shear resistance of the side wall structure 2.

[0063] Optionally, continue to refer to Figure 4 and Figure 5 The top of the precast pool wall 21 has two protruding first connecting portions 213 on both sides. These first connecting portions 213 support the precast main beam 31 and the precast top slab 32, facilitating their placement and ensuring a reliable connection. Figure 7 The bottom of the precast pool wall 21 is provided with a second connecting part 214. The second connecting part 214 is engaged between two adjacent first connecting steel bars 11 on the cast-in-place base slab 1 to facilitate the initial connection between the precast pool wall 21 and the cast-in-place pool wall 22. Then, by pouring concrete at the connection between the precast pool wall 21 and the first connecting steel bar 11, the connection between the precast pool wall 21 and the cast-in-place base slab 1 is completed.

[0064] Specifically, such as Figure 4 and Figure 5 As shown, the precast tank wall 21 has a sixth connecting steel bar 215 protruding from both the top and bottom. The sixth connecting steel bar 215 at the top is used to connect with the precast main beam 31 and the precast top slab 32, and the sixth connecting steel bar 215 at the bottom is used to connect with the first connecting steel bar 11 on the cast-in-place base slab 1 to improve the tightness of the connection. In addition, the precast tank wall 21 has inlets and outlets (not shown in the figure) to allow sewage to enter and exit the biological reactor structure.

[0065] Optionally, such as Figure 8 As shown, the precast top slab 32 is provided with a third connecting steel bar 322 protruding around its perimeter. The third connecting steel bar 322 is connected to the side wall structure 2 and the precast main beam 31 to enhance the connection strength between the precast top slab 32 and the side wall structure 2, as well as between the precast top slab 32 and the precast main beam 31.

[0066] Furthermore, such as Figure 9 As shown, a fourth connecting steel bar 311 protrudes from the upper end of the precast main beam 31, combined with... Figure 10 The fourth connecting steel bar 311 is used to connect with the third connecting steel bar 322 on the precast top slab 32 to improve the connection strength between the precast main beam 31 and the precast top slab 32. (Continue referring to...) Figure 9 The precast main beam 31 has fifth connecting steel bars 312 protruding at both ends along its length, combined with... Figure 10 The fifth connecting steel bar 312 is used to connect with the sixth connecting steel bar 215 set at the top of the precast pool wall 21 to improve the connection strength between the precast main beam 31 and the precast pool wall 21.

[0067] Optionally, continue to refer to Figure 9 Each precast main beam 31 has a second groove 314 at both ends along its length, and multiple second grooves 314 are spaced apart vertically. When two precast main beams 31 need to be connected, a second gap is left between the two precast main beams 31, and then concrete is poured into the second gap and the second grooves 314 to connect the two precast main beams 31. The setting of the second grooves 314 can ensure the connection strength at the connection point of the two precast main beams 31.

[0068] For example, in this embodiment, two second grooves 314 are provided at intervals along the vertical direction.

[0069] Specifically, the upper end of the precast main beam 31 is provided with a third connecting part on both sides. The third connecting part is used to support the precast top slab 32 to facilitate the placement of the precast top slab 32. At the same time, it can improve the connection strength between the precast main beam 31 and the precast top slab 32.

[0070] Optionally, such as Figure 10 As shown, a roughened area 313 is provided on the side wall of the precast main beam 31, and one end of the cast-in-place secondary beam 33 is connected to the roughened area 313. The roughened area 313 can improve the connection strength between the precast main beam 31 and the cast-in-place secondary beam 33.

[0071] Specifically, in this embodiment, a pre-reserved reinforcing bar is provided on the roughened area 313 to further improve the connection strength between the precast main beam 31 and the cast-in-place secondary beam 33.

[0072] Optionally, the upper surfaces of the precast pool wall 21, the precast main beam 31, and the precast top slab 32 are all provided with lifting rods 315, which are configured to be connected to the upward hoisting equipment to facilitate hoisting during construction.

[0073] On the other hand, a construction method for a semi-prefabricated bioreactor structure is also provided, applicable to the aforementioned bioreactor structure, comprising the following steps:

[0074] S1: Tie the reinforcing bars of the cast-in-place base slab 1 and clamp multiple precast pool walls 21 between two adjacent first connecting reinforcing bars 11;

[0075] Specifically, in this embodiment, the above steps involve tying the reinforcing bars and first connecting reinforcing bars 11 of the cast-in-place base slab 1, and pouring concrete to form the cast-in-place base slab 1. Multiple precast pool walls 21 are then hoisted onto the cast-in-place base slab 1 using an upward hoisting device. The second connecting portion 214 at the bottom of each precast pool wall 21 is then positioned between two adjacent first connecting reinforcing bars 11, connecting the sixth connecting reinforcing bar 215 at the bottom of the precast pool wall 21 to the first connecting reinforcing bars 11.

[0076] S2: Pour concrete between the precast pool wall 21 and the cast-in-place base slab 1, and between two adjacent precast pool walls 21, to connect the side wall structure 2 to the cast-in-place base slab 1;

[0077] Specifically, in this embodiment, concrete is poured at the point where the sixth connecting steel bar 215 connects to the first connecting steel bar 11 to connect the precast pool wall 21 to the cast-in-place base slab 1. Then, concrete is poured into the first gap between the two precast pool walls 21 to connect the two adjacent precast pool walls 21. Furthermore, a second connecting steel bar 211 protrudes from the side wall of the precast pool wall 21 located at the corner of the side wall structure 2. Concrete is poured into the second connecting steel bar 211 to form the cast-in-place pool wall 22, thereby completing the overall construction of the side wall structure 2.

[0078] S3: Erect a precast main beam 31 on the side wall structure 2, then erect a precast top plate 32 between the precast main beam 31 and the side wall structure 2, and pour concrete at the connection.

[0079] The above steps, specifically in the embodiments, refer to Figure 10 A precast main beam 31 is erected on the side wall structure 2, connecting the sixth connecting steel bar 215 at the top of the precast pool wall 21 to the fifth connecting steel bars 312 at both ends of the precast main beam 31. Then, a precast top slab 32 is erected between the precast main beam 31 and the side wall structure 2. One end of the precast top slab 32 is placed on the third connecting part of the precast main beam 31, connecting the third connecting steel bar 322 on the precast top slab 32 to the fourth connecting steel bar 311 on the precast main beam 31; the other end is placed on the precast pool wall 21, connecting the third connecting steel bar 322 on the precast top slab 32 to the sixth connecting steel bar 215 at the top of the precast pool wall 21. Concrete is then poured at the joints of the aforementioned connecting steel bars, referring to… Figure 11 This enables the connection between the precast main beam 31, the precast top slab 32 and the side wall structure 2.

[0080] S4: A casting cavity is formed between two precast top slabs 32 spaced apart on one side of the precast main beam 31. Concrete is poured into the casting cavity to form a cast-in-place secondary beam 33.

[0081] The above steps, specifically in this embodiment, are as follows: Figure 11 As shown, two precast top plates 32 are spaced apart on one side of the precast main beam 31 (one precast top plate 32 is omitted in the figure). The bending modules 321 on the two precast top plates 32 enclose the casting cavity. Concrete is poured into the casting cavity to form the cast-in-place secondary beam 33.

[0082] Specifically, in this embodiment, such as Figure 8 As shown, the precast top slab 32 is provided with multiple injection holes 323 spaced apart. The injection holes 323 make it easier to pour concrete into the casting cavity, thereby improving construction efficiency.

[0083] It should be noted that the above-mentioned connecting steel bars can be connected by lap splicing or by lap splicing followed by binding, in order to further improve the strength of the joint connection and ensure the integrity of the reaction tank structure.

[0084] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A semi-assembled bioreactor structure, characterized in that, include: A cast-in-place base slab (1) is provided with a first connecting steel bar (11) protruding from the cast-in-place base slab (1); The sidewall structure (2) includes: Multiple precast pool walls (21) are spaced apart. The bottom end of each precast pool wall (21) is locked between two adjacent first connecting steel bars (11). A first gap for pouring concrete is provided between two adjacent precast pool walls (21). The cast-in-place pool wall (22) is located at the corner of the side wall structure (2) and is connected between the two precast pool walls (21); The top structure (3) includes: The precast main beam (31) is erected on the side wall structure (2), and concrete is poured at the connection with the side wall structure (2); A precast top slab (32) is connected between the precast main beam (31) and the side wall structure (2). A bending module (321) is provided on the bottom side of the precast top slab (32). Two precast top slabs (32) are spaced apart on one side of the precast main beam (31). The bending module (321) on the two precast top slabs (32) and the precast main beam (31) enclose a casting cavity. A cast-in-place secondary beam (33) is set in the casting cavity, and the cast-in-place secondary beam (33) is connected between the precast main beam (31) and the side wall structure (2).

2. The semi-assembled bioreactor structure according to claim 1, characterized in that, A second connecting steel bar (211) is provided on the side of the precast pool wall (21) located at the corner of the side wall structure (2), and the second connecting steel bar (211) is used to connect the cast-in-place pool wall (22).

3. The semi-assembled bioreactor structure according to claim 2, characterized in that, The precast pool wall (21) is provided with a first groove (212) on both sides, and the first groove (212) extends in the vertical direction.

4. The semi-assembled bioreactor structure according to claim 1, characterized in that, The top of the precast pool wall (21) has two protruding first connecting parts (213), which are used to support the precast main beam (31) and the precast top plate (32). The bottom of the precast pool wall (21) is provided with a second connecting part (214), which is engaged between two adjacent first connecting steel bars (11) on the cast-in-place base plate (1).

5. The semi-assembled bioreactor structure according to claim 1, characterized in that, The precast top slab (32) is provided with a third connecting steel bar (322) protruding around its perimeter. The third connecting steel bar (322) is connected to the side wall structure (2) and the precast main beam (31).

6. The semi-assembled bioreactor structure according to claim 5, characterized in that, The upper end of the precast main beam (31) is provided with a fourth connecting steel bar (311), which is used to connect with the third connecting steel bar (322); The precast main beam (31) has a fifth connecting steel bar (312) protruding at both ends along its length, and the fifth connecting steel bar (312) is connected to the side wall structure (2).

7. The semi-assembled bioreactor structure according to claim 1, characterized in that, The precast main beam (31) has a roughened area (313) on its side wall, and one end of the cast-in-place secondary beam (33) is connected to the roughened area (313).

8. The semi-assembled bioreactor structure according to claim 1, characterized in that, The precast main beam (31) is provided with a second groove (314) at both ends along the length direction, and the second groove (314) is provided at intervals along the vertical direction.

9. The semi-assembled bioreactor structure according to any one of claims 1-8, characterized in that, The precast pool wall (21), the precast main beam (31), and the precast top plate (32) are all provided with lifting ribs (315).

10. A construction method for a semi-prefabricated bioreactor structure, characterized in that, The application to the semi-assembled bioreactor structure as described in any one of claims 1-9 includes the following steps: S1: Tie the reinforcing bars of the cast-in-place base slab (1) and clamp the multiple precast pool walls (21) between two adjacent first connecting reinforcing bars (11); S2: Concrete is poured between the precast pool wall (21) and the cast-in-place base plate (1), and between two adjacent precast pool walls (21), to connect the side wall structure (2) to the cast-in-place base plate (1). S3: Erect the precast main beam (31) on the side wall structure (2), then erect the precast top plate (32) between the precast main beam (31) and the side wall structure (2), and pour concrete at the connection. S4: The casting cavity is formed between two precast top plates (32) spaced apart on one side of the precast main beam (31), and concrete is poured into the casting cavity to form the cast-in-place secondary beam (33).

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