CN110939303A - Semi-reverse construction method of cyclone pool - Google Patents

Semi-reverse construction method of cyclone pool Download PDF

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CN110939303A
CN110939303A CN201911153674.4A CN201911153674A CN110939303A CN 110939303 A CN110939303 A CN 110939303A CN 201911153674 A CN201911153674 A CN 201911153674A CN 110939303 A CN110939303 A CN 110939303A
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construction
concrete
wall
template
steel bars
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CN110939303B (en
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牟晓亮
宋茂祥
张振
彭恩雄
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Shanghai Baoye Group Corp Ltd
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Shanghai Baoye Group Corp Ltd
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H7/00Construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site
    • E04H7/02Containers for fluids or gases; Supports therefor
    • E04H7/18Containers for fluids or gases; Supports therefor mainly of concrete, e.g. reinforced concrete, or other stone-like material

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Abstract

A construction method of a cyclone pool by a semi-reverse construction method is characterized by comprising the following steps: a. b, constructing the barrel of the wall of the rotational flow pool in a forward construction method, constructing the barrel of the wall of the rotational flow pool from a +/-0-11.0 meter section, constructing the barrel of the wall of the rotational flow pool in a reverse construction method, firstly performing chiseling at-11 to-14 m, performing concrete construction after the chiseling is finished, transferring the barrel to a well wall construction section at-14 to-17 m after the strength reaches 75 percent, and performing construction of a barrel wall and a bottom plate at-17 to-21.6 m after the construction is finished. The invention has the advantages of breaking through the novelty of the traditional full-inverse construction method, having good effects of retaining soil, supporting and preventing water and seepage, high self-strength of the tank wall, large rigidity, good anti-seepage performance and high construction speed, leading the tank wall of the outer cylinder to be divided from the middle to the bottom to reach various resources and tend to be balanced, facilitating the organization and coordination, improving the construction efficiency, promoting the construction progress, leading the construction workload of each section to be approximately balanced and leading the materials, machines, tools, personnel and construction period to be well coordinated.

Description

Semi-reverse construction method of cyclone pool
Technical Field
The invention relates to foundation pit excavation and concrete construction, in particular to a construction method of a cyclone pool by a semi-reverse construction method.
Background
The construction method of the cyclone pool engineering comprises three methods: a full-open type construction method, a sunk well type construction method and a reverse construction method. The full-open construction method is that after the earth and stone are dug greatly, construction is carried out from the lower part to the upper part, the operation surface of the full-open construction method needs to be enlarged by more than 30m of circular rings, the excavated earth and stone is increased by about 20000m3, other peripheral plant facilities are influenced and damaged, partial plant areas stop production, meanwhile, the periodic construction of peripheral hot rolling system engineering cannot be realized, and in addition, the cost needs to be increased by several times due to the processing schemes of later backfilling and the like. The open caisson type construction method is that a bottom structure project is constructed on the ground firstly, subsection construction is adopted, then subsection sinking is carried out, the influence of geological conditions is large, if the geology is a stone side, normal descending cannot be carried out, and if the geology is silt or underground water is rich, drifting or inclination can be generated during sedimentation. The reverse construction method has more construction joints, is easy to cause water leakage of the cylinder wall, and has high requirements on the precision of the template support and the enclosure structure.
Therefore, the above-mentioned inconveniences and problems are present in the known full open type construction method, open caisson type construction method, and reverse construction method.
Disclosure of Invention
The invention aims to provide a safe and reliable semi-reverse construction method of a rotational flow pool.
In order to achieve the purpose, the technical solution of the invention is as follows:
a construction method of a cyclone pool by a semi-reverse construction method is characterized by comprising the following steps:
a. the construction method of the wall cylinder of the cyclone tank is carried out, and the wall cylinder of the cyclone tank is constructed from +/-0 meter to-11.0 meters, and comprises the following steps:
construction of a first section: (1) paying off, determining a construction site control network arrangement scheme on the basis of control points or control networks provided by a rechecking owner, introducing coordinates and level points into a measuring team, setting control piles and well protecting the control piles;
(2) excavating the earthwork to the position of-2.20 meters and the bottom of the 1 st ring beam by using a large excavator;
(3) erecting a ring beam A steel bar, constructing the ring beam A steel bar, wherein a steel bar fixing support is arranged for positioning according to the axis position and the wall width in the process of binding the vertical steel bar, and an S-shaped lacing wire is arranged between the inner layer steel bar and the outer layer steel bar of the cyclone pool lining;
(4) 1, brushing a release agent before the template of the ring beam A template is used, strictly controlling the size of a plate seam, and avoiding the phenomena of uneven abutted seams, height difference and slurry leakage; before pouring lower-section lining structure concrete, arranging an expansion rubber water stop strip along the lower part of the lining construction joint, wherein the expansion rubber water stop strip is arranged in a full-length mode; the diameter of the wall of the cyclone tank is controlled by using a 50m steel tape to measure, and the deviation is found and adjusted in time; the mould removing sequence is that the mould is removed after the mould is removed, the non-bearing mould plate is removed before the bearing mould plate is removed; after the lining wall is poured, the strength of concrete reaches 70%, and the template and the scaffold are removed in time;
(5) pouring concrete, wherein the concrete is poured by adopting a cantilever pump truck, the concrete is filled into the formwork, and each formwork is provided with 2 plug-in vibrators, so that continuous closed pouring is required; the concrete is poured in layers, the pouring thickness of each layer is not more than 500mm, and air is strictly prevented from entering a receiving hopper of the concrete so as to prevent the formation of pipe blockage;
(6) curing the concrete, and watering and curing the concrete after the concrete is poured for 12 hours;
(7) excavating earthwork, wherein due to the limitation of working space, an excavator and a breaking and chiseling machine are adopted for working together, 20cm of outer cylinder wall is reserved for manual chiseling, when excavating earthwork at the first section, the contour line of the outer wall of the cylinder is scattered on the ground, and 20cm of earthwork is reserved for manual breaking and chiseling to ensure the roundness of the well wall;
and (3) second-stage construction: binding-11 m to-8 m well wall reinforcing steel bars and platform reserved reinforcing steel bars, erecting-11 m to-8 m templates, pouring-11 m to-8 m concrete, and maintaining the concrete;
and (3) third-stage construction: binding well wall reinforcing steel bars of-8 m to-4 m, reserving reinforcing steel bars on the platform, erecting a template of-8 m to-4 m, pouring concrete of-8 m to-4 m, and maintaining the concrete;
and (3) fourth construction: binding well wall reinforcing steel bars of-4 m to +/-0 m, reserving reinforcing steel bars of the platform, erecting a template of-4 m to +/-0 m, pouring concrete of-4 m to a ring beam, and maintaining the concrete;
b. the construction of the cyclone pool wall cylinder by a reverse construction method is carried out, firstly, chiseling is carried out within-11 to-14 m, after the chiseling is finished, the construction of concrete is carried out, after the strength reaches 75 percent, the cylinder wall is transferred to a well wall construction section at a position of-14 to-17 m, and after the construction is finished, the construction of a cylinder wall and a bottom plate within-17 to-21.6 m is carried out, and the construction method comprises the following steps:
and (5) fifth construction: a second layer of chisels are broken to be-14 to-11 m, soil walls are cleaned, a bottom plate cushion layer is bound, reinforcing steel bars of the well wall to be-14 to-11 m are bound, a template is erected, concrete is poured, and the concrete is maintained;
and a sixth construction stage: the third layer is chiseled for-17 to-14 m, the soil wall is cleaned, a bottom plate cushion layer is bound with-14 to-17 m well wall reinforcing steel bars, a template is erected, concrete is poured, and the concrete is maintained;
and a seventh construction stage: a fourth layer of chisels are broken at-17 to-21.5 m, soil walls are cleaned, a bottom plate cushion layer is bound with the whole spiral flow pool bottom plate steel bars at-21.5 to-16.52 m, a template is erected, concrete is poured, and the concrete is maintained;
and (5) eighth construction: and 2, inner cylinder ring beam construction: binding steel bars of-16.52 to-14.5 m, erecting a template, pouring concrete and maintaining the concrete;
and ninth construction: binding steel bars of minus 14.5 to minus 11m, erecting a template, pouring concrete and maintaining the concrete;
and (5) tenth construction: binding steel bars of minus 11m to minus 8m, erecting a template, pouring concrete and maintaining the concrete;
and eleventh construction: binding reinforcing steel bars of-8 to-4 m, erecting a template, pouring concrete and maintaining the concrete;
and a twelfth construction stage: binding reinforcing steel bars of minus 4 to plus 1.2m, erecting a template, pouring concrete and curing the concrete.
The construction method of the swirling flow pool by the semi-reverse method can be further realized by adopting the following technical measures.
In the method, the S-shaped lacing wires are arranged in a quincunx shape with the diameter of 10@100 mm.
In the method, the bottom plate is firmly bound with the upper layer of steel bars and the lower layer of steel bars by adopting the phi 16mm tie bars, so that the integrity of the steel bar framework is ensured.
In the method, the width of the 1 st ring beam is more than or equal to 1m, and the depth of the 1 st ring beam is more than or equal to 1 m.
In the method, the flatness and the verticality of the 1 st ring beam template are controlled by using a plumb bob, each section with the maximum verticality is controlled within 5mm, and the verticality of the whole outer well wall is controlled within 20 mm.
After the technical scheme is adopted, the construction method of the cyclone pool by the semi-reverse method has the following advantages:
1. the outer barrel of the cyclone pool adopts a construction method of a semi-inverse method from middle to bottom and by sections, breaks through the traditional construction method of a full inverse method, and has the characteristic of novelty;
2. the soil retaining, supporting and water preventing and seepage stopping effects are good. The characteristics of high strength, large rigidity and good impermeability of the tank wall are fully utilized;
3. the construction speed is high. The outer barrel wall is manufactured from middle to bottom in sections, so that various resources tend to be balanced, organization coordination is facilitated, construction efficiency is improved, and construction progress is promoted.
4. The coordination is good. The construction process has approximately balanced workload, and the construction period of materials, machines, personnel and the like can be well coordinated.
Drawings
FIG. 1 is a schematic diagram of the structure and sectional operation of a cyclone tank according to an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
Example 1
The invention discloses a construction method of a cyclone pool by a semi-reverse method, which comprises the following steps:
a. the construction method of the wall cylinder of the cyclone tank is carried out, and the wall cylinder of the cyclone tank is constructed from +/-0 meter to-11.0 meters, and comprises the following steps:
construction of a first section: (1) and paying off, determining a construction site control network arrangement scheme on the basis of a control point or a control network provided by a rechecking owner, introducing coordinates and level points into a measuring team, setting a control pile and well protecting the control pile.
(2) Excavating the earth to-2.20 meters and the bottom of the ring beam A by using a large excavator.
(3) Erecting a ring beam A, constructing the ring beam A by steel bars, and binding vertical steel bars to position a steel bar fixing support according to the axis position and the wall width so as to ensure the accurate position of the steel bar fixing support. An S-shaped lacing wire is arranged between the inner layer reinforcing steel bar and the outer layer reinforcing steel bar of the lining of the cyclone tank and arranged in a quincunx shape of phi 10@100 mm; the bottom plate adopts phi 16mm lacing wires, the lacing wires are firmly bound with the upper layer of steel bars and the lower layer of steel bars, the integrity of the steel bar framework is ensured, and the width and the depth of the ring beam are 1m and 1 m.
(4) Erecting a template of the ring beam A, brushing a release agent before the template is used, strictly controlling the size of a plate seam, and avoiding the phenomena of uneven abutted seams, height difference, slurry leakage and the like; before pouring lower section lining structure concrete, set up expanded rubber sealing strip along inside lining construction joint lower part, expanded rubber sealing strip leads to long the setting, and overlap joint length is greater than or equal to 15 cm. The flatness and the verticality of the template are controlled by using a plumb bob, each section with the maximum verticality is controlled within 5mm, and the verticality of the whole outer well wall is controlled within 20 mm. The diameter of the well wall is controlled by a 50m steel tape, eight symmetrical direction lines are marked on each section of the well wall by ink lines, the steel tape is used for measuring after a mould is supported, and the deviation is found and adjusted in time. The dismantling time of the bearing templates (beams and slab bottom dies) with the concrete pouring leaking grooves reserved at the upper part during the internal mold construction of the reverse construction method section is required to meet the standard requirements. The mould removing sequence is that the non-bearing template is removed first and the bearing template is removed later, the non-bearing template is removed first and the bearing template is removed later. When the beam bottom die with larger span is dismantled, the dismantling process is carried out from the span to two ends respectively. The die is not required to be forcefully and violently removed, and the removed materials are timely transported away. And after the lining wall is poured, the strength of concrete reaches 70%, the template and the scaffold are removed in time, the template is lifted out of the pool by using a crane after being removed and is cleaned immediately, the surface of the template is coated with the isolating agent, and the lining wall is stacked orderly according to the specification.
(5) And (3) pouring concrete, wherein the concrete is poured by adopting a cantilever pump truck, the free-falling height of the concrete falling from a discharge port is not more than 2m, and a cylinder string or other measures for preventing the concrete from being separated are required when the free-falling height of the concrete falling from the discharge port is more than 2 m. The concrete is placed into a mould, 2 plug-in vibrators are arranged at each position, the vibration is fast plug-in and slow pull-out, the vibration time is based on no bubbling, and the plug-in depth is 5cm when the concrete enters the lower layer. And the outer wall of the well is provided with a hook rod to send the vibrating rod to the place for vibrating. And the outer wall of the well is provided with a hook rod to send the vibrating rod to the place for vibrating. Continuous closed casting is necessary. When concrete is poured, a specially-assigned person is dispatched to observe whether the template steel bars, the reserved holes, the embedded parts, the inserted bars and the like have displacement deformation or not, pouring is stopped immediately when problems are found, and finishing is finished before initial setting of the concrete. The concrete is poured in layers, the pouring thickness of each layer is not more than 500mm, and air is strictly prevented from entering a receiving hopper of the concrete so as to prevent the formation of pipe blockage.
(6) And curing the concrete, and watering and curing the concrete after the concrete is poured for 12 hours.
(7) And (3) excavating earthwork, wherein due to the limitation of a working space, a 120-inch excavator and a breaking and chiseling machine are jointly used for operating, the outer wall of a well is reserved for 20cm for manual chiseling, the excavated earthwork and broken gravels are lifted to the ground by a 25t crane and then are transported to a designated storage yard by an earthwork vehicle. Excavators and breakers were hoisted into and out of the whirlpool using a 150T crawler crane. When the first section of earthwork is excavated, the contour line of the outer wall of the well is scattered on the ground, 20cm of earthwork is reserved for manual breaking and chiseling to ensure the roundness of the wall of the well, and the verticality is controlled by using a plumb bob. The roundness and the verticality of each section of the lower part of the underground mine are controlled by using a plumb bob, the plumb bob is hung downwards from the inner well wall of the constructed upper section, and the plumb bob is measured by using a steel ruler.
And (3) second-stage construction: binding-11 m to-8 m well wall reinforcing steel bars and platform reserved reinforcing steel bars, erecting-11 m to-8 m templates, pouring-11 m to-8 m concrete, and maintaining the concrete.
And (3) third-stage construction: binding well wall reinforcing steel bars of-8 m to-4 m, reserving reinforcing steel bars of the platform, erecting a template of-8 m to-4 m, pouring concrete of-8 m to-4 m, and maintaining the concrete.
And (3) fourth construction: binding well wall reinforcing steel bars of-4 m to +/-0 m, reserving platform reinforcing steel bars, erecting templates of-4 m to +/-0 m, pouring concrete of-4 m to ring beams, and maintaining the concrete.
Referring now to fig. 1, fig. 1 is a schematic diagram illustrating the structure and sectional operation of a cyclone tank according to an embodiment of the present invention.
b. The construction of the cyclone pool wall cylinder by a reverse construction method is carried out, firstly, chiseling is carried out within-11 to-14 m, after the chiseling is finished, the construction of concrete is carried out, after the strength reaches 75 percent, the cylinder wall is transferred to a well wall construction section at a position of-14 to-17 m, and after the construction is finished, the construction of a cylinder wall and a bottom plate within-17 to-21.6 m is carried out, and the construction method comprises the following steps:
and (5) fifth construction: and (3) breaking and chiseling the second layer to the depth of minus 14 to minus 11m, cleaning a soil wall, backing a bottom plate, binding reinforcing steel bars of the wall of minus 14 to minus 11m, erecting a template, pouring concrete and maintaining the concrete.
And a sixth construction stage: and (3) breaking and chiseling the third layer to the depth of minus 17 to minus 14m, cleaning a soil wall, forming a base plate cushion, binding well wall reinforcing steel bars to the depth of minus 14 to minus 17m, erecting a template, pouring concrete and maintaining the concrete.
And a seventh construction stage: and (3) breaking a fourth layer to-17 to-21.5 m, cleaning a soil wall, binding a base plate cushion layer, binding a whole spiral flow pool base plate steel bar of-21.5 to-16.52 m, erecting a template, pouring concrete and maintaining the concrete.
And (5) eighth construction: and 2, inner cylinder ring beam construction: binding steel bars of-16.52-14.5 m, erecting a template, pouring concrete and maintaining the concrete.
And ninth construction: binding steel bars of-14.5 to-11 m, erecting a template, pouring concrete and maintaining the concrete.
And (5) tenth construction: binding steel bars of minus 11m to minus 8m, erecting a template, pouring concrete and maintaining the concrete.
And eleventh construction: binding reinforcing steel bars of minus 8 to minus 4m, erecting a template, pouring concrete and maintaining the concrete.
And a twelfth construction stage: binding reinforcing steel bars of minus 4 to plus 1.2m, erecting a template, pouring concrete and curing the concrete.
The construction method has the advantages that the method has substantial characteristics and obvious technical progress, the influence of large excavation on the installation of peripheral equipment foundations and steel structures is reduced, and the total construction period of a project is effectively shortened; the disturbance to the land is reduced, and the excavation and backfilling amount of the earthwork are reduced, so that the construction cost is reduced.
The construction method of the swirling flow pool in the semi-reverse construction method is applied to steelmaking and steel-making continuous casting projects of Malaysia combined steel projects, the effect is obvious, the diameter of the swirling flow pool in the steelmaking and steel-making continuous casting projects is 15m, and the bottom elevation is-21.6 m. The bottom plate is 1700mm thick, and the external wall panel is 800mm thick. The construction is carried out by adopting a semi-reverse construction method, the engineering is smoothly completed, and a successful example is provided for similar engineering in the future.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Accordingly, all equivalents are intended to fall within the scope of the invention, which is defined in the claims.

Claims (5)

1. A construction method of a cyclone pool by a semi-reverse construction method is characterized by comprising the following steps:
a. the construction method of the wall cylinder of the cyclone tank is carried out, and the wall cylinder of the cyclone tank is constructed from +/-0 meter to-11.0 meters, and comprises the following steps:
construction of a first section: (1) paying off, determining a construction site control network arrangement scheme on the basis of control points or control networks provided by a rechecking owner, introducing coordinates and level points into a measuring team, setting control piles and well protecting the control piles;
(2) excavating the earthwork to the position of-2.20 meters and the bottom of the 1 st ring beam by using a large excavator;
(3) erecting a ring beam A steel bar, binding a vertical steel bar of the ring beam A steel bar, arranging a steel bar fixing support according to the axis position and the wall width for positioning, and arranging an S-shaped lacing wire between the inner layer steel bar and the outer layer steel bar of the cyclone pool lining;
(4) erecting a 1 st ring beam template, brushing a release agent before the template is used, strictly controlling the size of a plate seam, and avoiding the phenomena of uneven abutted seams, height difference and slurry leakage; before pouring lower-section lining structure concrete, arranging an expansion rubber water stop strip along the lower part of the lining construction joint, wherein the expansion rubber water stop strip is arranged in a full-length mode; the diameter of the wall of the cyclone tank is controlled by using a 50m steel tape to measure, and the deviation is found and adjusted in time; the mould removing sequence is that the mould is removed after the mould is removed, the non-bearing mould plate is removed before the bearing mould plate is removed; after the lining wall is poured, the strength of concrete reaches 70%, and the template and the scaffold are removed in time;
(5) pouring concrete, wherein the concrete is poured by adopting a cantilever pump truck, the concrete is filled into the formwork, and each formwork is provided with 2 plug-in vibrators, so that continuous closed pouring is required; the concrete is poured in layers, the pouring thickness of each layer is not more than 500mm, and air is strictly prevented from entering a receiving hopper of the concrete so as to prevent the formation of pipe blockage;
(6) curing the concrete, and watering and curing the concrete after the concrete is poured for 12 hours;
(7) excavating earthwork, wherein due to the limitation of working space, an excavator and a breaking and chiseling machine are adopted for working together, 20cm of outer cylinder wall is reserved for manual chiseling, when excavating earthwork at the first section, the contour line of the outer wall of the cylinder is scattered on the ground, and 20cm of earthwork is reserved for manual breaking and chiseling to ensure the roundness of the well wall;
and (3) second-stage construction: binding-11 m to-8 m well wall reinforcing steel bars and platform reserved reinforcing steel bars, erecting-11 m to-8 m templates, pouring-11 m to-8 m concrete, and maintaining the concrete;
and (3) third-stage construction: binding well wall reinforcing steel bars of-8 m to-4 m, reserving reinforcing steel bars on the platform, erecting a template of-8 m to-4 m, pouring concrete of-8 m to-4 m, and maintaining the concrete;
and (3) fourth construction: binding well wall reinforcing steel bars of-4 m to +/-0 m, reserving reinforcing steel bars of the platform, erecting a template of-4 m to +/-0 m, pouring concrete of-4 m to a ring beam, and maintaining the concrete;
b. the reverse construction method is carried out on the wall cylinder of the cyclone pool, firstly, the-11 to-14 m of chiseling is carried out, the construction of concrete is carried out after the chiseling is finished, the wall cylinder is transferred to a well wall construction section at the position of-14 to-17 m after the strength reaches 75 percent, and the construction of the wall cylinder and the bottom plate at the position of-17 to-21.6 m is carried out after the construction is finished, and the reverse construction method comprises the following steps:
and (5) fifth construction: a second layer of the wall is broken and chiseled for-14 to-11 m, the soil wall is cleaned, a bottom plate cushion layer is bound with-14 to-11 m well wall reinforcing steel bars, a template is erected, concrete is poured, and the concrete is maintained;
and a sixth construction stage: the third layer is chiseled for-17 to-14 m, the soil wall is cleaned, a bottom plate cushion layer is bound with-14 to-17 m well wall reinforcing steel bars, a template is erected, concrete is poured, and the concrete is maintained;
and a seventh construction stage: a fourth layer of chisels are broken by-17 to-21.5 m, soil walls are cleaned, a bottom plate cushion layer is bound with-21.5 to-16.52 m of whole spiral flow pool bottom plate reinforcing steel bars, a template is erected, concrete is poured, and the concrete is maintained;
and (5) eighth construction: and 2, inner cylinder ring beam construction: binding steel bars of-16.52-14.5 m, erecting a template, pouring concrete and maintaining the concrete;
and ninth construction: binding steel bars with the length of-14.5 to-11 m, erecting a template, pouring concrete and maintaining the concrete;
and (5) tenth construction: binding steel bars of-11 m to-8 m, erecting a template, pouring concrete and maintaining the concrete;
and eleventh construction: binding-8 to-4 m of steel bars, erecting a template, pouring concrete and maintaining the concrete;
and a twelfth construction stage: binding reinforcing steel bars of minus 4 to plus 1.2m, erecting a template, pouring concrete and curing the concrete.
2. The construction method of the semi-reverse method of the rotational flow pool as claimed in claim 1, wherein the S-shaped lacing wires are arranged in a quincunx shape with a diameter of 10@100 mm.
3. The construction method of the cyclone pond semi-reverse construction method according to claim 1, wherein the bottom plate adopts a tie bar with the diameter of 16mm, the tie bar is firmly bound with the upper layer of steel bars and the lower layer of steel bars, and the integrity of a steel bar framework is ensured.
4. The construction method of the cyclone pool by the semi-reverse method according to claim 1, wherein the width of the 1 st ring beam is more than or equal to 1m, and the depth of the 1 st ring beam is more than or equal to 1 m.
5. The construction method of the semi-reverse construction method of the rotational flow pool as claimed in claim 1, wherein the flatness and the verticality of the 1 st ring beam template are controlled by using a plumb bob, each section with the maximum verticality is controlled within 5mm, and the verticality of the whole outer well wall is controlled within 20 mm.
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PCT/CN2019/120678 WO2021097863A1 (en) 2019-11-22 2019-11-25 Swirl pool construction method employing semi-reverse construction

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CN114941463A (en) * 2022-05-05 2022-08-26 上海宝冶集团有限公司 Segmented modular construction method for top cover of cyclone pool

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