Rotational flow sedimentation tank

Abstract

The utility model provides a rotational flow sedimentation tank. The rotational flow sedimentation tank comprises a foundation pit, and a tank wall vertical section, a tank wall oblique cone section and a tank bottom plate which are arranged in the foundation pit, a plurality of cast-in-place piles are arranged on the side wall of the foundation pit in the circumferential direction at intervals, the tops of the cast-in-place piles are connected through an annular top beam, the pool wall vertical section is suspended and supported on the annular top beam, one end of the pool wall oblique cone section is connected with the bottom of the pool wall vertical section, and the other end of the pool wall oblique cone section is connected with the pool bottom plate. According to the rotational flow sedimentation tank, a proper amount of cast-in-place piles are arranged on the outer side of the vertical section of the tank wall, meanwhile, the annular top beam is designed to connect the tops of the cast-in-place piles, and the connection of the annular top beam and the vertical section of the tank wall is used as a vertical supporting structure of the rotational flow sedimentation tank, so that the vertical section of the tank wall can be constructed by adopting a reverse construction method; the problem that an upper loose and soft soil layer or a recent fill stratum cannot meet the lateral anchoring requirement of the pool wall is solved, only the dead weights of the annular top beam and the vertical section of the pool wall need to be considered for the cast-in-place piles, and therefore the number of the cast-in-place piles is greatly reduced, and the piling construction period and cost are greatly reduced.

Description

Technical Field

[0001] This utility model belongs to the field of building engineering technology, and specifically relates to a vortex sedimentation tank. Background Technology

[0002] In steel plants, cyclone sedimentation tanks are important supporting facilities for continuous casting machines and steel rolling production lines, and are a key link in the purification and treatment of wastewater generated during the billet rolling process. The depth of cyclone sedimentation tanks is generally 15m to 30m. Depending on the surrounding environment, site size, and geological conditions, as well as the overall cost and construction period requirements, construction methods generally include caissons, large-scale excavation with slope protection, pile support, or diaphragm wall support.

[0003] If the site of the vortex sedimentation tank has a thick layer of loose, soft soil or a thick layer of recently filled soil that cannot meet the requirements for lateral anchoring of the tank wall, or if the site space is limited or there are nearby buildings that make large-scale excavation and slope excavation unsuitable, and if there are hard rock layers in the lower part of the soil layer that are not suitable for caisson construction, then it is generally necessary to use cast-in-place piles for pile support or underground continuous walls for support before proceeding with forward excavation. This significantly increases the number of piles required, complicates the construction process, and leads to a sharp increase in support and construction costs, while also extending the construction period, often failing to meet the requirements of project schedule and cost control. Utility Model Content

[0004] The purpose of this invention is to provide a vortex sedimentation tank that can at least solve some of the defects existing in the prior art.

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

[0006] A vortex sedimentation tank includes a foundation pit, and a vertical section of the tank wall, a tapered section of the tank wall, and a bottom plate disposed inside the foundation pit; the sidewall of the foundation pit is provided with a plurality of cast-in-place piles spaced apart along its circumference, the top of each cast-in-place pile is connected by an annular cap beam, the vertical section of the tank wall is suspended and supported on the annular cap beam, one end of the tapered section of the tank wall is connected to the bottom of the vertical section of the tank wall, and the other end of the tapered section of the tank wall is connected to the bottom plate of the tank.

[0007] Furthermore, the vertical section of the pool wall is constructed by constructing several vertical sidewalls in a reverse manner from top to bottom.

[0008] Furthermore, the uppermost vertical sidewall of the vertical section of the pool wall penetrates the upper and lower surfaces of the annular crown beam.

[0009] Furthermore, connecting steel bars are provided between the annular crown beam and the vertical sidewall.

[0010] Furthermore, the height of the vertical sidewalls described in each section is 3-4m.

[0011] Furthermore, the bottom of the cast-in-place pile is 1-2m below the bottom of the vertical section of the pool wall.

[0012] Furthermore, the cast-in-place piles are tension piles.

[0013] Furthermore, a horizontal platform is provided at the connection between the vertical section of the pool wall and the inclined conical section of the pool wall.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] The vortex sedimentation tank provided by this utility model sets an appropriate number of cast-in-place piles on the outside of the vertical section of the tank wall, and designs an annular cap beam to connect the tops of each cast-in-place pile. The connection between the annular cap beam and the vertical section of the tank wall serves as the vertical support structure of the vortex sedimentation tank. This allows the vertical section of the tank wall to be constructed using a reverse construction method, solving the problem that the upper loose and weak soil layer or the newly filled soil layer cannot meet the lateral anchoring requirements of the tank wall. Furthermore, the cast-in-place piles only need to consider the self-weight of the annular cap beam and the vertical section of the tank wall, thereby greatly reducing the number of cast-in-place piles, the pile driving period, and the cost.

[0016] The present invention will be further described in detail below with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a horizontal cross-sectional view of the cyclone sedimentation tank of this utility model;

[0018] Figure 2 yes Figure 1 Schematic diagram of section AA.

[0019] Explanation of reference numerals in the attached drawings: 1. Cast-in-place pile; 2. Ring-shaped crown beam; 3. Pool bottom slab; 4. Inclined cone section of pool wall; 5. First vertical side wall; 6. Second vertical side wall; 7. Third vertical side wall; 8. Horizontal connecting platform. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0021] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 limitations on this utility model.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, abutting connections, or integral connections. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this utility model, unless otherwise stated, "a plurality of" or "several" means two or more.

[0024] like Figure 1 and Figure 2 As shown, this embodiment provides a vortex sedimentation tank, including a foundation pit, and a vertical section of the tank wall, a tapered section 4 of the tank wall, and a bottom plate 3 disposed inside the foundation pit; wherein, the sidewall of the foundation pit is provided with a plurality of cast-in-place piles 1 at intervals along its circumference, and the top of each cast-in-place pile 1 is connected by an annular capping beam 2, the vertical section of the tank wall is annular and is suspended and supported on the annular capping beam 2, one end of the tapered section 4 of the tank wall is connected to the bottom of the vertical section of the tank wall, and the other end of the tapered section 4 of the tank wall is connected to the bottom plate 3.

[0025] Optionally, the vertical section of the pool wall and the inclined conical section 4 of the pool wall are connected by a horizontal connecting platform 8.

[0026] In this embodiment, the cast-in-place piles 1 are set on the outside of the vertical section of the pool wall. The number of cast-in-place piles 1 is determined according to the annular cap beam 2 and the self-weight of the vertical section of the pool wall. The annular cap beam 2 connects the top of each cast-in-place pile 1. The connection between the annular cap beam 1 and the vertical section of the pool wall serves as the vertical support structure of the vortex sedimentation tank. This allows the vertical section of the pool wall to be constructed using the reverse construction method, solving the problem that the upper loose and weak soil layer or the newly filled soil layer cannot meet the lateral anchorage requirements of the pool wall. Furthermore, the cast-in-place piles 1 only need to consider the self-weight of the annular cap beam and the vertical section of the pool wall. As a result, the number of cast-in-place piles is reduced, and the piling period and cost are greatly reduced.

[0027] In a preferred embodiment, the vertical section of the pool wall is constructed in reverse order from top to bottom, segment by segment. The height of each constructed vertical sidewall section is 3-4m, depending on the total height of the vortex sedimentation tank wall. Specifically, in this embodiment, the vertical section of the pool wall is constructed in three vertical sidewall sections, from top to bottom: the first vertical sidewall section 5, the second vertical sidewall section 6, and the third vertical sidewall section 7.

[0028] During construction, the cast-in-place piles 1 are constructed first, followed by the excavation of part of the foundation pit for the annular cap beam 2, and then the annular cap beam 2 is constructed. Connecting steel bars are pre-installed at the top and bottom of the annular cap beam 2 to connect to the vertical sidewalls. Next, the foundation pit for the first section of the vertical sidewall 5 is excavated, and the first section of the vertical sidewall 5 is constructed. Then, the foundation pit for the second section of the vertical sidewall 6 is excavated, and the second section of the vertical sidewall 6 is constructed, and so on, until all vertical sidewalls of the pool wall are completed. Afterwards, the soil of the inclined conical section 4 of the pool wall is excavated, and the inclined conical section 4 of the pool wall and the pool bottom slab 3 are constructed in the forward direction. In this embodiment, the structural design of this vortex sedimentation tank can adopt a construction method combining piles and semi-reverse construction, effectively solving the problem of limited on-site construction space or the presence of nearby buildings (structures). The construction process is simple, reliable, and highly safe.

[0029] Furthermore, the uppermost vertical sidewall section of the vertical segment of the pool wall (i.e., the first vertical sidewall section 5) penetrates the upper and lower surfaces of the annular cap beam 2. During construction, the uppermost vertical sidewall section (i.e., the first vertical sidewall section 5) can be divided into upper and lower parts. The upper part is located on the upper surface of the annular cap beam 2, and the lower part is located on the lower surface of the annular cap beam 2. Connecting steel bars are pre-installed at the upper and lower parts of the annular cap beam 2, so that the first vertical sidewall section 5 can be connected with the upper and lower surfaces of the annular cap beam 2 to form a whole during construction. The upper part of the first vertical sidewall section 5 is used to support the top plate of the vortex sedimentation tank, and the upper surface of the upper part of the first vertical sidewall section 5 is flush with the upper surface of the foundation pit.

[0030] Since the design of the cast-in-place pile 1 in this embodiment only needs to consider the self-weight of the annular crown beam 2 and the vertical section of the pool wall, and its main function is to support the annular crown beam 2 and the vertical section of the pool wall, the driving depth of the cast-in-place pile 1 in this embodiment can be shallower than that of conventional cast-in-place piles for row support. In this embodiment, the bottom of the cast-in-place pile 1 only needs to be 1-2m below the bottom of the vertical section of the pool wall, while existing cast-in-place piles for row support need to be driven to a position at least 0.8-1.2 times the length of the vertical section of the pool wall below the vertical section, thus reducing the difficulty and cost of pile driving.

[0031] Preferably, the cast-in-place pile 1 can be used as a counterweight for anti-buoyancy during the construction and use of the vortex sedimentation tank. The cast-in-place pile 1 is designed as an anti-pull-out pile to provide resistance for anti-buoyancy of the vortex sedimentation tank, thereby effectively reducing the amount of counterweight concrete added to the vortex sedimentation tank for anti-buoyancy in the past, which has good economic benefits.

[0032] Furthermore, the cast-in-place pile 1 can be cast together with each section of the vertical sidewall of the pool wall to further improve the anti-buoyancy effect of the vortex sedimentation tank.

[0033] In summary, the vortex sedimentation tank provided by this utility model, by setting an appropriate number of cast-in-place piles on the outer side of the vertical section of the tank wall and designing an annular capping beam to connect the tops of each cast-in-place pile, uses the connection between the annular capping beam and the vertical section of the tank wall as the vertical support structure of the vortex sedimentation tank. This allows the vertical section of the tank wall to be constructed using a reverse construction method, solving the problem that the upper loose and weak soil layer or the newly filled soil layer cannot meet the lateral anchoring requirements of the tank wall. Furthermore, the cast-in-place piles only need to consider the self-weight of the annular capping beam and the vertical section of the tank wall, thereby greatly reducing the number of cast-in-place piles, the pile driving period, and the cost.

[0034] The above examples are merely illustrative of the present invention and do not constitute a limitation on the scope of protection of the present invention. All designs that are the same as or similar to the present invention are within the scope of protection of the present invention.

Claims

1. A vortex sedimentation tank, characterized in that: The structure includes a foundation pit, and a vertical section of the pool wall, a tapered section of the pool wall, and a bottom slab disposed inside the foundation pit. The sidewall of the foundation pit is provided with a number of cast-in-place piles spaced apart along its circumference. The top of each cast-in-place pile is connected by a ring-shaped capping beam. The vertical section of the pool wall is suspended and supported on the ring-shaped capping beam. One end of the tapered section of the pool wall is connected to the bottom of the vertical section of the pool wall, and the other end of the tapered section of the pool wall is connected to the bottom slab of the pool.

2. The cyclone sedimentation tank as described in claim 1, characterized in that: The vertical section of the pool wall is constructed by using several vertical sidewalls constructed in reverse from top to bottom.

3. The cyclone sedimentation tank as described in claim 2, characterized in that: The uppermost vertical sidewall of the vertical section of the pool wall penetrates the upper and lower surfaces of the annular crown beam.

4. The cyclone sedimentation tank as described in claim 3, characterized in that: A connecting steel bar is provided between the annular cap beam and the vertical sidewall.

5. The cyclone sedimentation tank as described in claim 2, characterized in that: The vertical sidewall height described in each section is 3-4m.

6. The cyclone sedimentation tank as described in claim 1, characterized in that: The bottom of the cast-in-place pile is 1-2m below the bottom of the vertical section of the pool wall.

7. The cyclone sedimentation tank as described in claim 1, characterized in that: The cast-in-place piles are tension piles.

8. The cyclone sedimentation tank as described in claim 1, characterized in that: A horizontal platform is provided at the connection between the vertical section of the pool wall and the inclined conical section of the pool wall.

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