Construction method for externally-attached high-position accident water tank of granulation tower

Abstract

The invention discloses a construction method for a high-position accident water tank attached outside a granulation tower, and relates to the technical field of building construction. The construction method comprises the steps that double-reference positioning and embedded part construction are conducted; building a variable cross-section annular cantilever platform; sliding mode-platform synchronous collaborative debugging is carried out; graded pouring of water tanks; removing the platform and the template in stages; according to the construction method, positioning precision, collaboration, crack resistance, impermeability and dismantling safety are all considered, and the construction quality and efficiency of the high-position accident water tank attached to the outside of the granulation tower are improved.

Description

Technical Field

[0001] This invention belongs to the field of building engineering technology, specifically relating to a construction method for an external high-level emergency water tank for a granulation tower. Background Technology

[0002] The external high-level emergency water tank of the granulation tower is a core emergency facility in the slag treatment system of steel plants. It provides a high-speed water flow to the slag flushing tank in case of granulation pump failure. It is typically attached to the 28-33m mid-section of the 80m-class granulation tower wall, presenting three major construction challenges: firstly, the working surface is high (28.6m-33.05m), and secondly, the granulation tower wall has a uniform slope and variable cross-section (slope of 0.0% from ±0.0m to 15.0m, and 0.0% from 15.0m to 80.0m). First, the slope is 2.7%, making conventional platforms difficult to adapt; second, the site is adjacent to newly constructed structures (such as the iron tapping yard frame and dry slag pit) and production roads, making the construction site compact. Traditional scaffolding can easily occupy passage space and affect surrounding construction; third, the water tank needs to be poured synchronously and integrally with the granulation tower wall (the corbel and base plate are connected to the wall). If they are constructed separately, it can easily lead to insufficient strength of the corbel and leakage at the joints. In addition, it needs to be coordinated with the granulation tower slipform device to avoid affecting the construction of the upper wall.

[0003] Existing construction techniques have significant limitations:

[0004] Traditional scaffolding method: It needs to be erected from the ground to a height of 33m, with close spacing between uprights and horizontal bars (due to the large load), and wall ties need to be installed on the cylinder wall. It not only has a large material investment (high cost of measures), but also a long erection and dismantling period (about 35 days), but also occupies ground space, affects the construction and production passage of surrounding structures, and has prominent safety risks (falls from height, scaffolding collapse).

[0005] Chinese patent application (publication number CN119321221A) discloses a construction method for a water tank in the middle of a chimney. Although it solves the site problem, the platform positioning relies on a single benchmark (the cross line of the chimney foundation) and does not consider the impact of the variable cross-section slope of the granulation tower on the accuracy of the embedded parts, which can easily lead to uneven stress on the platform. The platform structure uses straight pipes and multiple sets of arc pipes spliced ​​together, which has poor adaptability and does not clearly define the synchronous coordination mechanism with the granulation tower slipform device, making it difficult to achieve integrated casting of the water tank and the cylinder wall. In addition, it does not optimize anti-seepage measures for the high humidity environment of the granulation tower and only relies on conventional formwork reinforcement, which can easily lead to formwork deformation and concrete leakage.

[0006] To address the aforementioned issues, a construction method needs to be proposed that is compatible with the variable cross-section of the granulation tower, deeply coordinated with the slipform device, and balances accuracy and impermeability, in order to resolve the core contradictions of high altitude, confined space, and simultaneous pouring. Summary of the Invention

[0007] The purpose of this invention is to provide a construction method that takes into account positioning accuracy, coordination, crack resistance and seepage resistance, and demolition safety, so as to improve the construction quality and efficiency of the high-level emergency water tank attached to the granulation tower.

[0008] The specific technical solution adopted by this invention is as follows:

[0009] A construction method for an external elevated emergency water tank for a granulation tower includes the following steps:

[0010] S1: Dual-reference positioning and pre-embedded part construction: After calibrating the coaxiality of the granulation tower center and the foundation cup center at the set position, multiple sets of pre-embedded parts are evenly pre-embedded around the cylinder wall at the set elevation of the granulation tower. The center distance deviation between adjacent pre-embedded parts is less than or equal to 1.5mm. The set position is located within 5m below the water tank.

[0011] S2: Erecting a variable cross-section circular cantilever platform, prefabricating multiple sets of steel tripods corresponding one-to-one with multiple sets of embedded parts, welding and fixing each steel tripod to the corresponding embedded parts, laying the circular platform beam and steel plank on the steel tripod in sequence, and erecting safety railings and safety nets.

[0012] S3: Sliding formwork-platform synchronous and coordinated debugging, retain the granulation tower sliding formwork device, adjust the height of the outer template of the sliding formwork to 1.5m, install displacement sensors on the sliding formwork jacks, install laser rangefinders on the ring platform, and link the hydraulic control console to control the lifting speed of the sliding formwork to the set speed, and ensure that the synchronous deviation is no more than 2mm;

[0013] S4: The water tank is poured in stages, with the concrete poured in three stages: the first stage is the bottom plate and corbel of the water tank, the second stage is the side wall of the water tank, and the third stage is the top side wall and top plate of the water tank.

[0014] S5: Dismantle the platform and formwork in stages. After the concrete strength reaches 100% of the design value, dismantle the safety railings, safety nets, steel planks, flat circular platform beams, and steel tripods in sequence.

[0015] Preferably, step S1 specifically includes:

[0016] Using the center point of the cross at the base of the granulation tower as reference A, elevation and section control points are set on the cylinder wall at elevations of 26.7m to 27.5m and used as reference B. After calibrating the coaxiality of reference A and reference B, 24 sets of embedded parts are evenly embedded along the circumference of the cylinder wall at elevations of 28.0m to 28.5m.

[0017] Preferably, in step S1, a total station laser plumb line is used to calibrate the coaxiality of reference A and reference B to ensure that the deviation is no greater than 1 mm.

[0018] Preferably, the embedded part includes an embedded plate and an anchor claw, and the anchor claw is connected to the embedded plate by a through-hole plug weld.

[0019] Preferably, in step S2: the crossbeam of the steel tripod has a length of 2.2m to 2.5m, and the angle between the diagonal brace and the crossbeam is 60° to 65°, which is suitable for the slope requirements of the outer wall of the 15.0m to 80.0m section of the granulation tower.

[0020] Preferably, the sliding formwork device in step S3 includes 18 hydraulic jacks and 1 hydraulic control console.

[0021] Preferably, in step S4: the first pour is made to an elevation of 30.0m to complete the construction of the water tank bottom plate and corbel; the second pour is made to an elevation of 31.5m to complete the construction of the water tank side wall; the third pour is made to an elevation of 33.05m to complete the construction of the water tank upper side wall and top plate; a vibrator is used for compaction during and after each pour, and water-swellable sealing strips are pasted at the joints of the formwork; the concrete used for the water tank is impermeable concrete.

[0022] Preferably, when pouring the upper layer of concrete, the vibrator is inserted 50mm±1mm into the lower layer of concrete, and the concrete slump is controlled at 180mm±20mm.

[0023] Preferably, in step S5, a fall arrestor is installed above the slipform device during the dismantling process.

[0024] Preferred options also include:

[0025] S6: Quality control measures: the deviation of the template axis is controlled to be no more than 3mm, the deviation of the concrete cross-section size is controlled to be no more than 2mm, the deviation of the surface flatness is controlled to be no more than 4mm, the water tightness test lasts for 24 hours, and the water seepage is no more than 0.05L / (m²·h).

[0026] Compared with the prior art, the present invention has at least one of the following advantages or beneficial effects:

[0027] 1. Improved adaptability: Dual-base positioning and steel tripod design adapt to the variable cross-section of granulation tower slope, with embedded part position deviation not exceeding 1mm, and uniform platform stress, solving the problem of poor adaptability of traditional platforms;

[0028] 2. Collaborative optimization: The slipform-platform synchronous control mechanism enables the water tank and cylinder wall to be cast in one piece, reducing the joint leakage rate to 0 and ensuring that the corbel meets the design requirements (increasing the load-bearing capacity by 15%).

[0029] 3. Significant economic benefits: Compared with the traditional scaffolding method, the construction period is shortened to 16 days (saving 19 days), and the cost of measures is reduced by 250,000 yuan (taking the Jiuquan Iron and Steel Project as an example); the component recycling rate is ≥85%, reducing material waste;

[0030] 4. Impermeability compatibility: Impermeable concrete + water-swellable waterstop strip + graded vibration, suitable for high humidity environment, the water leakage in the water tightness test is far below the standard requirements, and no additional leak sealing process is required. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the construction method of the external high-level emergency water tank of the granulation tower in an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the arrangement of the embedded parts in an embodiment of the present invention;

[0033] Figure 3 This is a front view of the embedded part in an embodiment of the present invention;

[0034] Figure 4 This is a side view of the embedded part in an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the construction structure of the steel tripod in an embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of the sliding membrane device in an embodiment of the present invention;

[0037] Figure 7 This is a schematic diagram of the concrete pouring structure for the water tank in an embodiment of the present invention;

[0038] Figure 8 This is a schematic diagram showing the completion of water tank construction in an embodiment of the present invention;

[0039] Among them, 1. Granulation tower wall; 2. Embedded part centerline; 3. Embedded part; 31. Embedded part plate; 32. Anchor claw; 4. Steel tripod; 5. Slipform device; 6. Slipform inner hanger; 7. Slipform outer hanger; 8. Water tank. Detailed Implementation

[0040] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0041] like Figure 1 As shown in the figure, this embodiment discloses a construction method for an external high-level emergency water tank for a granulation tower. Based on the uniform slope and variable cross-section characteristics of the granulation tower and the collaborative requirements of the slipform device, the specific construction method includes the following steps:

[0042] Step S1: Dual-datum positioning and embedded part construction

[0043] 1.1 Benchmark Calibration: Verify the cross center point and four control points (benchmark A) at the cup mouth of the granulation tower foundation. Set four elevation benchmark points and cross-sectional dimension control points (benchmark B) on the granulation tower wall 1 at the completed 27m elevation (within 5m below water tank 8, in the stable slope section). Establish a three-dimensional coordinate system using a total station and calibrate the coaxiality of benchmark A and benchmark B with a laser plumb line to ensure that the deviation is ≤1mm.

[0044] 1.2 Design and fabrication of embedded parts: Based on the load calculation of water tank 8 (including construction live load), 24 sets of embedded parts 3 are determined, each set including two embedded parts 3, with dimensions of 300mm×250mm×16mm; For example... Figure 3 and 4 As shown, each embedded part 3 includes an embedded plate 31 and an anchor claw 32 fixedly connected to the embedded plate 31. The anchor claw 32 of the embedded part 3 adopts a structure combining a straight section and a bendable section. The straight section is 400mm long. If the thickness of the granulation tower wall 1 (330mm at the corbel and 300mm at the side wall) is insufficient, the end of the anchor claw 32 is bent at 15° (the bent section is 50mm long). The anchor claw 32 is connected to the embedded plate 31 by through-hole plug welding, and the weld height is ≥8mm (to avoid false welding).

[0045] 1.3 Installation and acceptance of embedded parts: such as Figure 2 As shown, according to the double reference positioning marks, the embedded parts 32 are evenly arranged along the circumference of the cylinder wall from 28.0m to 28.5m (15° spacing) along the center line 2 of the embedded parts. After installation, the center distance between adjacent embedded parts is checked with a steel tape measure (allowable deviation ±2mm). C40P6 impermeable concrete (suitable for high humidity environment) is poured. After 24 hours, the formwork is removed and cured. After the concrete strength reaches 85% of the design value, the elevation of the embedded parts (allowable deviation ±3mm) and the center line 2 of the embedded parts (allowable deviation ±1mm) are re-measured, and the welding position of the steel tripod 4 is marked.

[0046] Step S2: Erection of the variable cross-section circular cantilever platform

[0047] 2.1 Steel Tripod Fabrication and Installation: 24 sets of steel tripods (4 units) are prefabricated in the embedded parts processing shed. Figure 5As shown, the crossbeam of the steel tripod 4 is made of 20a channel steel (length 2.2m~2.5m, slightly adjusted according to the slope of the cylinder wall), and the diagonal brace is made of 2×L90×6 angle steel (angle with the crossbeam 60°~65°, suitable for a 2.7% slope). The stiffening plates of the steel tripod 4 are made of 6mm thick steel plates (dimensions 150mm×100mm). After the strength of the granulation tower cylinder wall 1 meets the standard, the welder stands in the anti-sway hanging basket modified from the slipform outer hanger 7 and welds the steel tripod 4 according to the marked position of the embedded parts. The welding process is supervised by a dedicated person, and cross-operation is prohibited. The weld is tested by ultrasonic testing (pass rate ≥98%). The slipform device is as follows: Figure 6 As shown.

[0048] 2.2 Circular Platform Assembly: After the 24 sets of tripods are installed, remove the anti-sway hanging basket modified from the outer slipform hanger 7. The inner slipform hanger 6 does not need to be removed. Lay three circular 20a channel steel platform beams on top of the steel tripod 4 (the inner beam is 100mm from the cylinder wall, the outer beam is 800mm from the inner beam, and the middle beam is centrally located). Weld Φ25 steel bars to the beams with scissor bracing (1.5m spacing) to form a triangular stable frame. The platform is fully covered with 3mm thick anti-slip steel planks. The two ends of the steel planks are tied to the platform beams with 10# iron wire (each plank has ≥3 binding points to prevent displacement at height).

[0049] 2.3 Safety Protection and Acceptance: A 1.2m high circular safety railing (1.2m spacing between uprights and 2 horizontal bars) shall be erected at the edge of the platform. A dense safety net (mesh density ≥ 2000 meshes / 100cm²) shall be hung on the inside of the railing. A horizontal safety net shall be installed 2m below the platform (one net every 10m). The load-bearing capacity of the platform shall be calculated using the Lizheng Structural Design Toolbox Software 7.5 to ensure that the uniformly distributed load is ≥ 2.5kN / m². After acceptance, the next process shall proceed.

[0050] Step 3: Sliding Model-Platform Synchronous Co-operation Debugging

[0051] 3.1 Slipform Device Modification and Adaptation: The original slipform device of the granulation tower (including 18 GYD-60 hydraulic jacks and 1 YKT-56 hydraulic control console) will be retained, and the inner formwork and cage of slipform device 5 will not be removed; the height of the outer formwork of slipform will be adjusted to 1.5m (to adapt to the staged pouring height of the water tank), and safety ropes (Φ10 steel wire ropes) will be added to both sides of the slipform cage (this slipform cage is the equipment used for vertical transportation of materials and personnel in slipform construction) for personnel to go up and down and for material transfer;

[0052] 3.2 Establishment of Synchronous Control Mechanism: Install displacement sensors on the slipform jacks and laser rangefinders at three evenly distributed points (0°, 120°, 240°) on the annular platform. Link the sensors with the hydraulic control console. During commissioning, control the slipform to rise at a speed of 0.5 m / h and collect displacement data in real time. When the elevation deviation between the platform and the slipform exceeds 2 mm, adjust the jack pressure (±0.2 MPa) to ensure synchronization and avoid misalignment between the granulation tower wall 1 and the water tank 8 during casting.

[0053] Step 4: As Figure 7 As shown, the water tank is constructed in eight stages with controlled seepage.

[0054] 4.1 Staged Pouring Design: Based on the slipform lifting height (1.5m / form), the water tank concrete will be poured in three stages, all using C40P6 impermeable concrete.

[0055] First pour: 8 bottom slabs (250mm thick) and 8 corbels of the water tank, slipform jacking up to an elevation of 30.0m (bottom elevation of the water tank + 28.6m), erecting a scaffolding support system for the bottom slab (800mm spacing between uprights, 1.2m step spacing between horizontal bars, and bidirectional ground-level bracing), acceptance after reinforcement binding, and compaction using a Φ50 immersion vibrator (vibration point spacing ≤ 500mm, insertion depth to the bottom of the bottom slab to avoid missed vibration);

[0056] Second pour: The side wall of the water tank is raised to the 31.5m elevation (the slipform is then lifted by 1.5m, and the corresponding height of the granulated tower wall is constructed simultaneously (the inner side uses slipform templates, and the outer side uses newly supplied film-coated plywood templates). A 5mm thick water-swellable sealing strip is applied to the template joints (to prevent grout leakage). When pouring concrete, the vibrator is inserted 50mm into the lower layer of concrete to eliminate the joints.

[0057] Third pouring: Upper side wall (31.5m~33.05m) and top plate (200mm thick) of water tank 8. The slipform is raised to the 33.05m elevation. The top plate reinforcement is welded to the main reinforcement of the cylinder wall (lap length ≥10d, where d is the diameter of the reinforcement). The slump is controlled at 180±20mm during pouring. Adding water is strictly prohibited.

[0058] 4.2 Reinforcement and Formwork Control: The 8 corbel reinforcements of the water tank are made of Φ25 threaded steel (anchorage length ≥393mm), and are welded to the main reinforcement of the cylinder wall on both sides; the horizontal circumferential reinforcements (diameter ≥Φ16) are processed into arc shapes according to the corresponding elevation of the cylinder wall radius (to match a 2.7% slope), and the joint stagger rate is ≤25%; the flatness of the formwork is checked with a 2m straightedge, and the allowable deviation is ≤2mm, and the verticality deviation is ≤3mm (≤5m height).

[0059] Step 5: Platform and template removal

[0060] 5.1 Acceptance of Demolition Conditions: After the top slab of water tank 8 is poured, it shall be water-cured for ≥7 days (extend the curing period in high humidity environments). After the concrete strength reaches 100% of the design value, the appearance of water tank 8 (no cracks, exposed reinforcement) and the verticality of the cylinder wall (allowable deviation ≤8mm) shall be inspected. Figure 8 The structure shown;

[0061] 5.2. Staged dismantling: A 25t truck crane and a 32m aerial work platform are used for dismantling. The sequence is as follows: safety railings / dense mesh netting → steel scaffolding → annular channel steel platform beam → steel tripod 4. After the dismantled tripod, channel steel and other components are derusted (sandblasting grade Sa2.5) and the welds are inspected, they are reused in the next granulation tower (recycling rate ≥85%). During the dismantling process, fall arrestors are set above the slipform device to prevent components from being thrown.

[0062] Step 6: Quality and Safety Control

[0063] 6.1 Quality Acceptance: The quality shall be in accordance with the "Technical Specification for Sliding Formwork Engineering" GB50113 and the "Code for Acceptance of Construction Quality of Concrete Structures" GB50204. The deviation of the formwork axis shall be ≤3mm, the deviation of the concrete cross-sectional dimensions shall be ±2mm, and the surface flatness shall be ≤4mm (without plastering). A water tightness test (water level 2.8m, continuous for 24 hours) shall be conducted, with a seepage rate ≤0.05L / (m²・h).

[0064] 6.2 Safety Measures: The slipform operation platform is equipped with independent 36V safety lighting and leakage protection device ("one machine, one switch, one leakage protection device, one box"); construction shall be suspended during thunderstorms, heavy rain, and winds of level 6 or above; when welding at height, a fire basin and fire extinguisher shall be set up below, and a dedicated safety officer shall supervise the entire process.

[0065] The following detailed explanation uses the No. 2 granulation tower of the ironmaking process equipment upgrading and transformation project of Gansu Jiuquan Iron & Steel Group Hongxing Iron & Steel Co., Ltd. as an example:

[0066] I. Engineering Parameters

[0067] The granulation tower is 80m high, with an inner diameter of 6.0m at the top. The wall slope is 0.0% for the ±0.0m~15.0m section and 2.7% for the 15.0m~80.0m section. The water tank is located at 28.6m~33.05m, with an outer diameter of 9.1m and a height of 2.8m. It has 8 brackets (the thickness of the cylinder at the joint with the wall is 330mm) and uses C40P6 impermeable concrete.

[0068] II. Brief Description of Implementation Steps

[0069] 1. The coaxiality calibration deviation between reference A (base cup mouth cross line) and reference B (27m cylinder wall control point) is 0.8mm. The embedded parts are evenly arranged along the 28.2m elevation cylinder wall, and the center distance deviation between adjacent embedded parts is 1.5mm.

[0070] 2. The tripod crossbeam is 2.3m long (suitable for a cylindrical wall radius of 27m), the angle between the diagonal brace and the crossbeam is 62°, the spacing between the three annular channel steel beams is 800mm, and the platform bearing capacity calculation results are: maximum normal stress 73.38N / mm² (≤215N / mm²), shear stress 12.82N / mm² (≤125N / mm²), which meets the requirements;

[0071] 3. The slipform lifting speed is 0.5m / h, the synchronous deviation is controlled within 1.8mm, and the three pours are completed at elevations of 30.0m, 31.5m and 33.05m respectively, with an interval of 24 hours between each pour (initial setting time of concrete).

[0072] 4. The deviation of the formwork axis is 2mm, the deviation of the concrete cross-section size is +1mm, the verticality deviation is 6mm (total height 80m), and the water seepage rate in the 24h water tightness test is 0.03L / (m²·h), all of which meet the requirements of the specifications.

[0073] 5. The construction period was 16 days (19 days less than the scaffolding method), the cost of the measures was reduced by 250,000 yuan, the component recycling rate was 88%, and the project was approved by the owner and supervisor.

[0074] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A construction method for an external high-level emergency water tank for a granulation tower, characterized in that, Includes the following steps: S1: Dual-reference positioning and pre-embedded part construction: After calibrating the coaxiality of the granulation tower center and the foundation cup center at the set position, multiple sets of pre-embedded parts are evenly pre-embedded around the cylinder wall at the set elevation of the granulation tower. The center distance deviation between adjacent pre-embedded parts is less than or equal to 1.5mm. The set position is located within 5m below the water tank. S2: Erecting a variable cross-section circular cantilever platform, prefabricating multiple sets of steel tripods corresponding one-to-one with multiple sets of embedded parts, welding and fixing each steel tripod to the corresponding embedded parts, laying the circular platform beam and steel plank on the steel tripod in sequence, and erecting safety railings and safety nets. S3: Sliding formwork-platform synchronous and coordinated debugging, retain the granulation tower sliding formwork device, adjust the height of the outer template of the sliding formwork to 1.5m, install displacement sensors on the sliding formwork jacks, install laser rangefinders on the ring platform, and link the hydraulic control console to control the lifting speed of the sliding formwork to the set speed, and ensure that the synchronous deviation is no more than 2mm; S4: The water tank is poured in stages, with the concrete poured in three stages: the first stage is the bottom plate and corbel of the water tank, the second stage is the side wall of the water tank, and the third stage is the top side wall and top plate of the water tank. S5: Dismantle the platform and formwork in stages. After the concrete strength reaches 100% of the design value, dismantle the safety railings, safety nets, steel planks, flat circular platform beams, and steel tripods in sequence.

2. The construction method for an external high-level emergency water tank for the granulation tower as described in claim 1, characterized in that, Step S1 specifically includes: Using the center point of the cross at the base of the granulation tower as reference A, elevation and section control points are set on the cylinder wall at elevations of 26.7m to 27.5m and used as reference B. After calibrating the coaxiality of reference A and reference B, 24 sets of embedded parts are evenly embedded along the circumference of the cylinder wall at elevations of 28.0m to 28.5m.

3. The construction method for an external high-level emergency water tank for the granulation tower as described in claim 2, characterized in that, In step S1, the coaxiality of reference A and reference B is calibrated using a total station laser plumb line to ensure that the deviation is no greater than 1 mm.

4. The construction method for an external high-level emergency water tank for the granulation tower as described in claim 1, characterized in that, The embedded part includes an embedded plate and an anchor claw, and the anchor claw is connected to the embedded plate by a through-hole plug weld.

5. The construction method for an external high-level emergency water tank for the granulation tower as described in claim 1, characterized in that, In step S2: the crossbeam of the steel tripod is 2.2m to 2.5m long, and the angle between the diagonal brace and the crossbeam is 60° to 65°, which is suitable for the slope requirements of the outer wall of the granulation tower section from 15.0m to 80.0m.

6. The construction method for an external high-level emergency water tank for the granulation tower as described in claim 1, characterized in that, The sliding formwork device in step S3 includes 18 hydraulic jacks and 1 hydraulic control console.

7. The construction method for an external high-level emergency water tank for the granulation tower as described in claim 1, characterized in that, In step S4: the first pour is made to an elevation of 30.0m to complete the construction of the water tank bottom plate and corbel; the second pour is made to an elevation of 31.5m to complete the construction of the water tank side wall; the third pour is made to an elevation of 33.05m to complete the construction of the water tank upper side wall and top plate; a vibrator is used for compaction during and after each pour, and water-swellable sealing strips are pasted at the joints of the formwork. The concrete used for the water tank is impermeable concrete.

8. The construction method for an external high-level emergency water tank for the granulation tower as described in claim 7, characterized in that, When pouring the upper layer of concrete, the vibrator should be inserted 50mm±1mm into the lower layer of concrete, and the concrete slump should be controlled at 180mm±20mm.

9. The construction method for an external high-level emergency water tank for the granulation tower as described in claim 1, characterized in that, In step S5, a fall arrestor is installed above the slipform device during the dismantling process.

10. The construction method for an external high-level emergency water tank for a granulation tower as described in claim 1, characterized in that, Also includes: S6: Quality control measures: the deviation of the template axis is controlled to be no more than 3mm, the deviation of the concrete cross-section size is controlled to be no more than 2mm, the deviation of the surface flatness is controlled to be no more than 4mm, the water tightness test lasts for 24 hours, and the water seepage is no more than 0.05L / (m²·h).

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