Construction method of w-shaped structure of intermediate silo bottom of ecia stockyard

Abstract

The application discloses a construction method of a W-shaped structure of a middle silo bottom in an ECIA stockyard, which decomposes the W-shaped structure of the middle silo bottom into independent left side wall components, right side wall components and a reclaimer cover component, sets two through-length anchoring grooves on a silo foundation, makes and fixes a splicing jig frame outside the two through-length anchoring grooves, hoists the left side wall components and the right side wall components into the through-length anchoring grooves to be grouted and fixed and leaned against the splicing jig frame, hoists and installs the reclaimer cover component between the left side wall components and the right side wall components, removes the splicing jig frame and pours the silo longitudinal wall, sequentially constructs the subsequent left side wall components, the right side wall components, the reclaimer cover component and the silo longitudinal wall in sections, and completes the overall construction of the W-shaped structure of the middle silo bottom. The method reduces the site pouring process and construction difficulty, facilitates the construction operation of a narrow operation surface, reduces the construction comprehensive cost and construction period, and improves the construction efficiency.

Description

Technical Field

[0001] This invention relates to the field of construction technology for steel metallurgical raw material yards, and in particular to a construction method for a W-shaped bottom structure of an intermediate silo in an ECIA material yard. Background Technology

[0002] ECIA (Extended Integrated Steel Container) yards are a new type of raw material yard for steel plants. Due to their high efficiency, environmental friendliness, and intelligent operation, combined with their economic benefits and practicality, ECIA yards represent a new trend in the steel smelting industry and are gradually being built and applied in major steel plants. The main body of the ECIA yard is a reinforced concrete structure, characterized by its ultra-long (over 100 meters), ultra-high (tens of meters), and ultra-thickness. The construction of the ECIA yard body is mainly based on the EC-type yard design. The bottom structure of the intermediate silo is relatively complex, resembling a W shape, and it is connected to the longitudinal walls. Following the conventional method of tying reinforcing bars, erecting formwork, and casting in place, it needs to be done in multiple stages, resulting in a long construction period and numerous difficulties. Its internal space is small, its shape is complex, its operating surface is small, and the removal of formwork and supports is difficult, resulting in high overall costs and a long construction period. It is a key process and a critical path in the entire yard project. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a construction method for the W-shaped bottom structure of the intermediate silo in the ECIA material yard. This method overcomes the defects of traditional methods such as tying steel bars, setting up formwork and pouring in stages, reduces on-site pouring procedures and construction difficulty, facilitates construction operations in narrow working areas, reduces overall construction cost and construction period, and improves construction efficiency.

[0004] To solve the above-mentioned technical problems, the construction method of the W-shaped bottom structure of the intermediate silo in the ECIA material yard of the present invention includes the following steps: Step 1: Through detailed design drawings, the W-shaped structure of the intermediate silo bottom is decomposed into several independent left side wall components, right side wall components, and material handling machine cover components. Each component is prefabricated in the factory. The connection between the left side wall components and the right side wall components and the material handling machine cover components is provided with tenon grooves and reserved joint steel bars. Step 2: During the construction of the silo foundation, two continuous anchoring grooves are set at the bottom of the left and right wall components for installation. Step 3: Make an assembly jig that matches the shape of the outer side of the left and right wall components. Hoist the assembly jigs in pairs to the silo foundation and fix them to the outside of the two full-length anchoring grooves of the silo foundation. Step 4: Hoist the left and right wall components to the silo foundation respectively, and grout them into the two continuous anchoring grooves at the bottom. The outer sides should be supported by the assembly frame. Step 5: Install a temporary steel support rod between the left and right wall components to support the suspended end of the material handling machine cover component. Hoist the material handling machine cover component between the left and right wall components. Insert the tenon joint into the connection between the material handling machine cover component and the left and right wall components and fix it with grout. Place the suspended end on the temporary steel support rod. Step 6: The two inclined surfaces of the material handling machine cover are fixed to the inner surfaces of the left and right wall components respectively using steel tie rods; Step 7: Dismantle the assembly frame, erect scaffolding on the outer sides of the left and right wall components respectively, and tie and support the steel bars and formwork for pouring the silo longitudinal wall. Pour the silo longitudinal wall on the outer sides of the left and right wall components, and connect the top of the outer sides of the left and right wall components to the silo longitudinal wall through the reserved steel bars. Step 8: After the top connection strength of the silo longitudinal wall with the outer side of the left and right wall components reaches the design requirements, remove the scaffolding and steel tie rods, and construct the subsequent left wall components, right wall components, material handling machine cover components and silo longitudinal wall in sections in sequence.

[0005] Step 9: Connect the completed adjacent left and right wall components and material handling machine cover components by binding the pre-reserved joint steel bars, erect the formwork, and pour micro-expansion concrete of a grade one higher than the components; after the micro-expansion concrete reaches the design strength, remove the temporary steel support rods to complete the overall construction of the W-shaped structure at the bottom of the intermediate silo.

[0006] Furthermore, the segment lengths of the left wall component, right wall component, and material handling machine cover component are determined based on prefabrication, transportation conditions, and hoisting capacity, and do not exceed 6 meters.

[0007] Furthermore, during the installation of the left and right wall components, thin steel plates are used to level and correct the deviation in the two continuous anchoring grooves, and grouting is carried out after the installation is completed. The construction method for the W-shaped bottom structure of the intermediate silo in the ECIA material yard of this invention adopts the above-mentioned technical solution. Specifically, this method decomposes the W-shaped bottom structure of the intermediate silo into independent left-side wall components, right-side wall components, and a material handling machine cover component. Two continuous anchoring grooves are set in the silo foundation. An assembly frame is fabricated and fixed to the outside of the two continuous anchoring grooves. The left-side and right-side wall components are hoisted into the continuous anchoring grooves, grouted, and then rest against the assembly frame. The material handling machine cover component is hoisted between the left-side and right-side wall components and installed. The assembly frame is then dismantled, and the longitudinal wall of the silo is poured. The subsequent left-side wall components, right-side wall components, material handling machine cover component, and longitudinal wall of the silo are constructed in segments to complete the overall construction of the W-shaped bottom structure of the intermediate silo. This method overcomes the shortcomings of traditional methods involving tying reinforcing bars, setting up formwork, and pouring concrete in stages. It reduces on-site pouring procedures and construction difficulty, facilitates construction work in confined spaces, reduces overall construction costs and time, and improves construction efficiency. Attached Figure Description

[0008] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the left and right wall components in this method; Figure 2 This is a schematic diagram of the material handling machine cover component structure in this method; Figure 3 A schematic diagram showing the continuous anchoring groove for the silo foundation in this method; Figure 4 This is a schematic diagram of the assembly of the left wall component, the right wall component, and the material handling machine cover component in this method; Figure 5 This is a schematic diagram showing the installation of the left and right side wall components and the material handling machine cover on the silo foundation in this method; Figure 6 This is a schematic diagram of the longitudinal wall casting of the silo in this method. Detailed Implementation

[0009] Implementation, for example Figures 1 to 6 As shown, the construction method of the W-shaped bottom structure of the intermediate silo in the ECIA material yard of the present invention includes the following steps: Step 1: Through the design refinement of drawings, the W-shaped structure of the bottom of the intermediate silo is decomposed into several independent left side wall component 1, right side wall component 2 and material handling machine cover component 3. Each component is prefabricated in the factory. The connection between the left side wall component 1 and the right side wall component 2 and the material handling machine cover component 3 is provided with tenon grooves 11 and 21 and reserved joint steel bars. Step 2: During the construction of the silo foundation 4, two continuous anchoring grooves 41 and 42 are set for installing the bottom of the left and right wall components; Step 3: Make an assembly jig 5 whose side shape matches the outer side shape of the left wall component 1 and the right wall component 2. The assembly jig 5 is hoisted in pairs to the silo foundation 4 and fixed to the outside of the two full-length anchoring grooves 41 and 42 of the silo foundation 4. Step 4: Hoist the left wall component 1 and the right wall component 2 to the silo foundation 4 respectively, and fix their bottoms in the two continuous anchoring grooves 41 and 42 respectively by grouting. Their outer sides are respectively supported by the assembly frame 5. Step 5: Install a temporary steel support rod 6 between the left wall component 1 and the right wall component 2 for supporting the suspended end of the material handling machine cover component 3. Hoist the material handling machine cover component 3 between the left wall component 1 and the right wall component 2. Insert the tenon joints 11 and 21 into the connection parts of the material handling machine cover component 3 with the left wall component 1 and the right wall component 2 and fix them with grout. The suspended end rests on the temporary steel support rod 6. Step 6: The two inclined surfaces of the material handling machine cover component 3 are fixed to the inner surfaces of the left wall component 1 and the right wall component 2 respectively using steel tie rods 7; Step 7: Dismantle the assembly frame 5, erect scaffolding 8 on the outer sides of the left wall component 1 and the right wall component 2 respectively, and tie and support the steel bars and formwork for pouring the silo longitudinal wall 9. Pour the silo longitudinal wall 9 on the outer sides of the left wall component 1 and the right wall component 2, and connect the top of the outer sides of the left wall component 1 and the right wall component 2 to the silo longitudinal wall 9 through the reserved steel bars. Step 8: After the top connection strength between the silo longitudinal wall 9 and the outer side of the left wall component 1 and the right wall component 2 reaches the design requirements, remove the scaffolding 8 and the steel tie rod 7, and construct the subsequent left wall component 1, right wall component 2, material handling machine cover component 3 and silo longitudinal wall 9 in sections in sequence. Step 9: Connect the completed adjacent sections of left wall component 1, right wall component 2, and material handling machine cover component 3 by binding the pre-reserved joint steel bars, erect the formwork, and pour micro-expansion concrete of a grade one higher than the components; after the micro-expansion concrete reaches the design strength, remove the temporary steel support rod 6 to complete the overall construction of the W-shaped structure at the bottom of the intermediate silo.

[0010] Preferably, the segment lengths of the left wall component 1, the right wall component 2, and the material handling machine cover component 3 are determined based on prefabrication, transportation conditions, and hoisting capacity, and do not exceed 6 meters.

[0011] Preferably, during the installation of the left wall component 1 and the right wall component 2, thin steel plates are used to level and correct the deviation in the two continuous anchoring grooves 41 and 42, and grouting is carried out after the installation is completed.

[0012] This method breaks down the complex structure of the intermediate silo bottom into multiple prefabricated components in a factory. Once the components reach the designed strength, they are hoisted and assembled on-site, connected and fixed using post-cast joints and grouting. Finally, they are connected to the cast-in-place silo longitudinal walls by binding reinforcing steel and pouring concrete, completing the construction of the complex bottom structure of the intermediate silo. The segmented, sequential construction of the intermediate silo bottom structure and the main material yard facilitates the efficient turnover of formwork, scaffolding, and assembly jigs, and optimizes the use of manpower. This reduces on-site pouring procedures and construction difficulty, and the assembly of components facilitates work in confined spaces. This method reduces overall construction costs and time, effectively improving construction efficiency.

[0013] Meanwhile, breaking down complex structures into simpler components reduces the difficulty of production and processing; centralized processing and mass production of components in the factory improves quality and speeds up production. Most concrete construction work is completed under controlled factory conditions, reducing environmentally harmful operations such as noise and dust at the construction site.

Claims

1. A construction method for a W-shaped bottom structure of an intermediate silo in an ECIA material yard, characterized in that... This method includes the following steps: Step 1: Through detailed design drawings, the W-shaped structure of the intermediate silo bottom is decomposed into several independent left side wall components, right side wall components, and material handling machine cover components. Each component is prefabricated in the factory. The connection between the left side wall components and the right side wall components and the material handling machine cover components is provided with tenon grooves and reserved joint steel bars. Step 2: During the construction of the silo foundation, two continuous anchoring grooves are set at the bottom of the left and right wall components for installation. Step 3: Make an assembly jig that matches the shape of the outer side of the left and right wall components. Hoist the assembly jigs in pairs to the silo foundation and fix them to the outside of the two full-length anchoring grooves of the silo foundation. Step 4: Hoist the left and right wall components to the silo foundation respectively, and grout them into the two continuous anchoring grooves at the bottom. The outer sides should be supported by the assembly frame. Step 5: Install a temporary steel support rod between the left and right wall components to support the suspended end of the material handling machine cover component. Hoist the material handling machine cover component between the left and right wall components. Insert the tenon joint into the connection between the material handling machine cover component and the left and right wall components and fix it with grout. Place the suspended end on the temporary steel support rod. Step 6: The two inclined surfaces of the material handling machine cover are fixed to the inner surfaces of the left and right wall components respectively using steel tie rods; Step 7: Dismantle the assembly frame, erect scaffolding on the outer sides of the left and right wall components respectively, and tie and support the steel bars and formwork for pouring the silo longitudinal wall. Pour the silo longitudinal wall on the outer sides of the left and right wall components, and connect the top of the outer sides of the left and right wall components to the silo longitudinal wall through the reserved steel bars. Step 8: After the top connection strength of the silo longitudinal wall with the left and right wall components reaches the design requirements, remove the scaffolding and steel tie rods, and construct the subsequent left and right wall components, material handling machine cover components and silo longitudinal wall in sections in sequence. Step 9: Connect the completed adjacent left and right wall components and material handling machine cover components by binding the pre-reserved joint steel bars, erect the formwork, and pour micro-expansion concrete of a grade one higher than the components; after the micro-expansion concrete reaches the design strength, remove the temporary steel support rods to complete the overall construction of the W-shaped structure at the bottom of the intermediate silo.

2. The construction method of the W-shaped bottom structure of the intermediate silo in the ECIA material yard according to claim 1, characterized in that: The segment lengths of the left wall component, right wall component, and material handling machine cover component are determined based on prefabrication, transportation conditions, and hoisting capacity, and do not exceed 6 meters.

3. The construction method of the W-shaped bottom structure of the intermediate silo in the ECIA material yard according to claim 1, characterized in that: During the installation of the left and right wall components, thin steel plates are used to level and correct the deviation in the two continuous anchoring grooves. Grouting is then carried out after the installation is completed.

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