A prefabricated construction method for water distribution walls

Abstract

This invention relates to a prefabricated construction method for a water distribution wall, comprising the following steps: S1: segmenting the water distribution wall; S2: pouring the main structure of the pool body and the lower solid water distribution wall, reserving a post-pouring strip at the connection between the main structure and the upper perforated water distribution wall during the pouring of the main structure, and reserving a continuous secondary grouting groove on the top surface of the lower solid water distribution wall during the pouring of the lower solid water distribution wall; S3: prefabricating the upper perforated water distribution wall; S4: hoisting the upper perforated water distribution wall and installing it on top of the lower solid water distribution wall; S5: welding steel plates to the main reinforcing bars of the post-pouring strip, and connecting and securing bolts through the steel plates to the pre-embedded threaded sleeves on the side of the upper perforated water distribution wall; S6: sealing the formwork of the post-pouring strip; S7: pouring concrete into the post-pouring strip; S8: injecting micro-expansion grout into the secondary grouting groove. This invention prefabricates the upper perforated water distribution wall and then assembles it for installation. The prefabrication of the upper perforated water distribution wall facilitates concrete vibration and results in high-quality molding.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and in particular relates to a prefabricated construction method for water distribution walls. Background Technology

[0002] Secondary sedimentation tanks are an important process unit in wastewater treatment. Through gravity settling, wastewater settles in a static state, forming two layers: a lower layer of sludge and an upper layer of clear water. Typically located after the biological treatment tank, they remove undegraded organic matter and suspended solids from the biological treatment tank, ensuring the wastewater meets discharge standards.

[0003] To ensure uniform water distribution and prevent the influent flow from impacting sedimentation, the water distribution wall in the secondary sedimentation tank of a wastewater treatment plant is typically designed with three layers of distribution holes (located at the top of the wall), arranged in an alternating pattern. It is generally constructed using cast-in-place concrete in a single process. However, in actual engineering, due to the staggered arrangement of the holes, custom-made square wooden boxes are used for the pre-reserved openings. This makes it impossible to insert a vibrator into the concrete during the cast-in-place concrete pouring and vibration processes, easily leading to concrete defects such as honeycomb and pitting. To improve the construction quality of the water distribution wall concrete, a prefabricated construction method for the water distribution wall is being developed to ensure quality and improve efficiency. Summary of the Invention

[0004] The main objective of this invention is to propose a prefabricated construction method for water distribution walls, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A method for prefabricating a water distribution wall includes the following steps:

[0007] S1: Divide the water distribution wall into sections, namely the upper perforated water distribution wall and the lower solid water distribution wall;

[0008] S2: Cast the main structure of the pool and the lower solid water distribution wall. The lower solid water distribution wall is cast in place along with the main structure of the pool. When casting the main structure of the pool, a post-cast strip is reserved at the connection between it and the upper perforated water distribution wall. When casting the lower solid water distribution wall, a long secondary grouting groove is reserved on its top surface.

[0009] S3: Prefabricated upper perforated water distribution wall, with pre-embedded threaded sleeves on both sides connecting the upper perforated water distribution wall to the main structure of the pool.

[0010] S4: Hoist the upper perforated water distribution wall and install it on top of the lower solid water distribution wall;

[0011] S5: Weld a steel plate onto the main reinforcing bar of the post-cast strip. After the bolt passes through the steel plate, it is connected and tightened to the pre-embedded threaded sleeve on the side of the perforated water distribution wall above.

[0012] S6: Post-pouring strip formwork sealing;

[0013] S7: Concrete is poured into the post-cast strip;

[0014] S8: Inject micro-expansion grout into the secondary grouting groove on the top surface of the lower solid water distribution wall, and connect the lower solid water distribution wall with the upper perforated water distribution wall as one unit.

[0015] Preferably, in step S2, the post-cast strip is separated by a fine-mesh wire mesh.

[0016] Preferably, in step S3, the upper perforated water distribution wall is prefabricated directly at the bottom of the pool body.

[0017] Preferably, in step S4, after the upper perforated water distribution wall is installed, it is fixed on its side using temporary fixed supports.

[0018] This invention provides a prefabricated construction method for water distribution walls, which has the following beneficial effects;

[0019] 1. This invention prefabricates the upper part of the water distribution wall that requires water distribution holes, i.e., the upper perforated water distribution wall is prefabricated and then assembled. The prefabrication of the upper perforated water distribution wall makes concrete vibration easier and the forming quality is high. It can effectively avoid the problems of concrete defects such as honeycomb and pitting that are easily generated when water distribution walls are formed by casting concrete in one go. At the same time, it also reduces the difficulty of steel bar binding, avoids the risks of high-altitude operations, and reduces the amount of formwork and support frame used.

[0020] 2. The main structure of the pool body and the upper perforated water distribution wall are connected by a post-cast strip, which can effectively ensure the connection strength between the main structure of the pool body and the upper perforated water distribution wall. Furthermore, the main reinforcing bars of the post-cast strip are connected to the pre-embedded threaded sleeves of the upper perforated water distribution wall by steel plates and bolts, which further ensures the connection strength.

[0021] 3. Inject micro-expansion grout into the secondary grouting groove on the top surface of the lower solid water distribution wall, so that the lower solid water distribution wall and the upper perforated water distribution wall are connected as one unit, ensuring the connection strength between the lower solid water distribution wall and the upper perforated water distribution wall. Attached Figure Description

[0022] Figure 1 This is an elevation view of the pool body of the present invention;

[0023] Figure 2 This is a cross-sectional view of the pool body of the present invention;

[0024] Figure 3 This is a partial plan view of the pool body of the present invention;

[0025] Figure 4 This is a schematic diagram of the perforated water distribution wall at the top of the present invention;

[0026] Figure 5 This is a schematic diagram of the post-cast strip structure of the present invention.

[0027] In the diagram: 1. Upper perforated water distribution wall; 2. Lower solid water distribution wall; 3. Main structure of the pool; 4. Post-cast strip; 5. Secondary grouting trench; 6. Threaded sleeve; 7. Water distribution hole; 8. Temporary fixed support; 9. Steel plate; 10. Bolt; 11. Dense wire mesh. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0029] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, 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 limiting this invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] Example

[0033] Reference Figure 1-5 , a prefabrication construction method for a water distribution wall, comprising the following steps:

[0034] S1: Segment the water distribution wall into an upper perforated water distribution wall 1 and a lower solid water distribution wall 2;

[0035] S2: Pour the main body structure 3 of the pool and the lower solid water distribution wall 2. The lower solid water distribution wall 2 is cast in situ along with the main body structure 3 of the pool. When pouring the main body structure 3 of the pool, a post-cast strip 4 is reserved at the connection with the upper perforated water distribution wall 1. When pouring the lower solid water distribution wall 2, a through-length secondary grouting groove 5 is reserved on its top surface;

[0036] In this embodiment, the post-cast strip 4 is separated by a dense mesh wire net 11. The functions of the dense mesh wire net 11 are, firstly, to prevent the concrete in the main body structure 3 of the pool from seeping into the post-cast strip 4, and secondly, to improve the toughness and tensile strength of the concrete poured in the post-cast strip 4 subsequently.

[0037] The cross-section of the post-cast strip 4 is "one", "soil" or "cross", which is specifically selected according to the wall structure of the main body structure 3 of the pool.

[0038] S3: Prefabricate the upper perforated water distribution wall 1, and pre-embed threaded sleeves 6 on both sides of the upper perforated water distribution wall 1 connected to the main body structure 3 of the pool;

[0039] In this embodiment, the upper perforated water distribution wall 1 is directly prefabricated at the bottom inside the pool. According to the design requirements, the water distribution wall steel bars and water distribution holes 7 are set. The on-site prefabrication of the upper perforated water distribution wall 1 can save transportation costs, and at the same time, it is also convenient for hoisting and installation, improving the construction efficiency.

[0040] S4: Hoist the upper perforated water distribution wall 1 and install it on the upper part of the lower solid water distribution wall 2;

[0041] In this embodiment, after the upper perforated water distribution wall 1 is installed, it is fixed by a temporary fixed support 8 on its side.

[0042] S5: Weld a steel plate 9 on the main steel bars of the post-cast strip 4, and after the bolt 10 passes through the steel plate 9, it is connected and tightened with the pre-embedded threaded sleeve 6 on the side of the upper perforated water distribution wall 1;

[0043] S6: Seal the formwork of the post-cast strip 4;

[0044] S7: Pour concrete into the post-cast strip 4;

[0045] The connection method of using the post-cast strip 4 between the main body structure 3 of the pool and the upper perforated water distribution wall 1 can effectively ensure the connection strength between the main body structure 3 of the pool and the upper perforated water distribution wall 1, and further ensure the connection strength by connecting the main steel bars of the post-cast strip 4 and the pre-embedded threaded sleeve 6 of the upper perforated water distribution wall 1 into one body through the steel plate 9 and the bolt 10.

[0046] S8: Inject micro-expansion grout into the secondary grouting groove 5 on the top surface of the lower solid water distribution wall 2, and connect the lower solid water distribution wall 2 with the upper perforated water distribution wall 1 as one unit to ensure the connection strength between the lower solid water distribution wall 2 and the upper perforated water distribution wall 1.

[0047] This invention prefabricates the upper part of the water distribution wall that requires water distribution holes 7, that is, the upper perforated water distribution wall 1 is prefabricated and then assembled. The prefabrication of the upper perforated water distribution wall 1 makes concrete vibration easier and the forming quality is high. It can effectively avoid the problems of concrete defects such as honeycomb and pitting that are easily generated when water distribution walls are formed by casting concrete in one go. At the same time, it also reduces the difficulty of steel bar binding, avoids the risks of high-altitude operations, and reduces the amount of formwork and support frame used.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for prefabricating a water distribution wall, characterized in that, Includes the following steps: S1: Divide the water distribution wall into sections, namely the upper perforated water distribution wall and the lower solid water distribution wall; S2: Cast the main structure of the pool and the lower solid water distribution wall. The lower solid water distribution wall is cast in place along with the main structure of the pool. When casting the main structure of the pool, a post-cast strip is reserved at the connection between it and the upper perforated water distribution wall. When casting the lower solid water distribution wall, a long secondary grouting groove is reserved on its top surface. The post-pouring strip is separated by a fine-mesh wire mesh; S3: Prefabricated upper perforated water distribution wall, with pre-embedded threaded sleeves on both sides connecting the upper perforated water distribution wall to the main structure of the pool. S4: Hoist the upper perforated water distribution wall and install it on top of the lower solid water distribution wall; S5: Weld a steel plate onto the main reinforcing bar of the post-cast strip. After the bolt passes through the steel plate, it is connected and tightened to the pre-embedded threaded sleeve on the side of the perforated water distribution wall above. S6: Post-pouring strip formwork sealing; S7: Concrete is poured into the post-cast strip; S8: Inject micro-expansion grout into the secondary grouting groove on the top surface of the lower solid water distribution wall, and connect the lower solid water distribution wall with the upper perforated water distribution wall as one unit.

2. The prefabrication construction method for a water distribution wall according to claim 1, characterized in that: In step S3, the upper perforated water distribution wall is prefabricated directly at the bottom of the pool body.

3. The prefabrication construction method for a water distribution wall according to claim 1, characterized in that: In step S4, after the upper perforated water distribution wall is installed, it is fixed on its side using temporary fixed supports.

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