Batched precision construction method for large-scale stepping type cold bed group foundation pier

Abstract

This invention proposes a highly efficient, batch-based, and precise construction method for large-scale, stepped-beam cooling bed group foundation piers. The method includes: measuring and positioning the overall raft foundation; installing reinforcement, formwork, and embedded parts; classifying the group of equipment foundation piers according to function and dimensions; and performing two precise measurements and overall positioning to ensure accurate relative positions between the piers. It also includes batch installation of reinforcing bars, reinforcement, formwork, and embedded parts for each group of piers, and using a specially designed set of fixing frames to secure all pier formwork, ensuring stability during construction. Finally, each group of piers is poured independently in batches. Precise control of the pouring process ensures construction quality while improving efficiency. This method integrates precise measurement and positioning technologies with the application of a complete set of fixing frames, achieving a perfect combination of batch processing and precise construction. It significantly improves the construction efficiency and quality of large-scale stepped-beam cooling bed group foundation piers, providing strong technical support and a model for related fields.

Description

Technical Field

[0001] This invention relates to the field of foundation and foundation group construction technology for large equipment, specifically a batch precision construction method for large-scale walking-type cold bed group foundation piers. Background Technology

[0002] A large steel company in Northwest China needs to build a new production line for heavy plate processing. The large walking beam cooling bed is a core piece of equipment in this process, its main function being to cool the steel plates after rolling to ensure their mechanical properties and dimensional accuracy. The large walking beam cooling bed has a complex structure, comprising hundreds of individual units, including fixed beams, moving beams, lateral transmissions, and lifting transmissions. These individual units have different functions and require extremely high installation precision.

[0003] In the construction of a cooling bed, the construction of the equipment foundation piers is a crucial step. These piers are the fundamental structures supporting and fixing the individual units on the cooling bed, and their accuracy in position and dimensions directly affects the overall installation precision and operational stability of the cooling bed. However, in current construction techniques, the construction of group equipment foundation piers on a large walking beam cooling bed's integral raft foundation commonly employs a method of multiple, decentralized layout and multiple, decentralized pouring. This method has some drawbacks: 1. Low construction accuracy: Due to the use of multiple decentralized layout steps, each layout step may contain some errors. These errors, when accumulated, can lead to a significant deviation between the final position of the equipment foundation pier and the design requirements. In addition, decentralized casting can also easily result in inconsistent dimensions of the foundation pier, further affecting installation accuracy.

[0004] 2. Low construction efficiency: Traditional construction methods require multiple steps such as setting out, measuring, and pouring, which is not only time-consuming but also involves waiting time between each step, leading to a longer overall construction cycle. Furthermore, the multiple construction steps complicate on-site management and organization, increasing construction costs.

[0005] 3. Impact on subsequent installation: The construction accuracy of the equipment foundation piers directly affects the installation of each individual unit on the cooling bed. If the position and size deviation of the foundation piers are too large, the individual units will not be able to be installed accurately, and may even require secondary processing or adjustment. This not only increases the installation difficulty and cost, but may also adversely affect the overall performance of the cooling bed.

[0006] Therefore, existing technologies have significant shortcomings in the construction of group equipment foundation piers on large-scale walking-type cooling bed integral raft foundations, and construction accuracy and efficiency urgently need to be improved. Summary of the Invention

[0007] The purpose of this invention is to overcome the above-mentioned defects and propose a new construction method that can solve the above problems, so as to improve the installation accuracy and efficiency of the cooling bed equipment and ensure the smooth operation of the production line.

[0008] To achieve the above objectives, the present invention is implemented as follows: A method for batch and precise construction of large-scale walking-beam cold bed group foundation piers includes the following steps: Step 1: Measure and position the overall raft foundation to ensure accurate foundation location; Step 2: Install the reinforcement, formwork, and embedded parts of the overall raft foundation to prepare for pouring; Step 3: Based on the principle of similar function and external dimensions, divide the foundation piers of the group equipment into foundation piers of fixed beam equipment, foundation piers of movable beam equipment, foundation piers of transverse transmission equipment, and foundation piers of lifting transmission equipment. Then, conduct the first accurate measurement and overall positioning, and at the same time, check and correct the relative positions between each group of piers. Step 4: Install the reinforcing bars for each group of piers in batches, ensuring accurate positioning and secure binding; Step 5: Pour the overall raft foundation, avoiding disturbing the reinforcing bars during the process; Step 6: After pouring, conduct a second precise measurement and overall positioning based on the principle of approximate function and external dimensions, and verify and correct the relative positions between each group of piers; Step 7: Install the reinforcing bars, formwork, and embedded parts for each group of piers in batches, connect the dowel bars and ensure that the positions are correct; Step 8: Secure all pier formwork using a complete set of fixing frames to ensure correct relative positioning; Step 9: Cast each group of piers in batches and independently to prevent mutual interference and improve construction efficiency; The precise measurement employs three-dimensional laser scanning technology combined with GPS positioning; the overall positioning establishes a three-dimensional coordinate system and optimizes the layout of the piers using a mathematical model, ensuring that the positioning accuracy is more than 20% higher than that of traditional methods.

[0009] Furthermore, the above-mentioned method for batch and precise construction of large-scale walking-type cooling bed group foundation piers includes, but is not limited to, fixed beam equipment foundation piers, movable beam equipment foundation piers, transverse transmission equipment foundation piers, and lifting transmission equipment foundation piers.

[0010] Furthermore, the aforementioned method for batch and precise construction of large-scale walking-type cold bed group foundation piers also includes, during the first and second precise measurements, the use of a total station to verify key control points to ensure measurement accuracy.

[0011] Furthermore, in the above-mentioned batch precision construction method for the foundation piers of large-scale step-type cold bed groups, the design of the complete set of fixing frames needs to take into account the size, shape and spatial relationship between the piers, and determine the structure and material of the complete set of fixing frames through mechanical calculations to ensure the fixing effect.

[0012] Furthermore, the mass production and precision construction method for the aforementioned large-scale step-type cold bed group foundation piers is characterized by the use of temperature control and pre-setting of vibration schemes during the overall raft foundation pouring process to ensure uniform concrete quality and reduce crack formation.

[0013] Furthermore, in the above-mentioned batch-precision construction method for large-scale step-type cold bed group foundation piers, in the step of independently pouring each group of piers in batches, the formwork must be cleaned and moistened before each batch of pouring to improve the adhesion between the concrete and the formwork.

[0014] Furthermore, in the aforementioned method for the batch and precise construction of large-scale walking-type cooling bed group foundation piers, the design of the complete set of fixing frames needs to consider the size, shape, and spatial relationship between the group piers. The structure and material of the fixing frames are determined through the following steps and mechanical calculation formulas to ensure their fixing effect:

[0015] Perform stress analysis on the fixed frame to identify the main types of loads it bears, including static loads consisting of the self-weight of the formwork, reinforcing bars, and concrete, as well as dynamic loads consisting of vibration force and wind force during the pouring process.

[0016] Based on the stress analysis results, materials with sufficient strength and rigidity are selected as the components of the fixing frame, including steel, aluminum alloy, or wood.

[0017] When designing the structure of the fixing frame, it is necessary to ensure that it can stably support the formwork and resist the action of various loads; the structural design should include the design of the connectors to ensure a firm connection between the fixing frame and the formwork.

[0018] When performing mechanical calculations, the strength, stiffness, and stability of the fixing frame must be considered; the specific calculation methods and formulas are as follows: S4.1 Strength Calculation: The stress formula in mechanics of materials is used to calculate the stress value of the fixing frame when it is subjected to the maximum load, ensuring that it does not exceed the allowable stress of the material; the formula is: σ = F / A, where σ is the stress, F is the load, and A is the area of ​​force application; S4.2 Stiffness Calculation: Calculate the deformation of the fixed frame under load to ensure that the deformation is within the allowable range; the formula is: δ = FL³ / (3EI), where δ is the deformation, F is the load, L is the span, E is the elastic modulus, and I is the moment of inertia of the section. S4.3 Stability Calculation: For slender rods, stability checks are required to prevent instability. The formula is: Pcr = (π²EI) / L², where Pcr is the critical buckling force, E is the elastic modulus, I is the moment of inertia of the section, and L is the length of the rod;

[0019] After completing the mechanical calculations, the design of the fixing frame needs to be checked and verified to ensure that it meets the construction requirements; the finite element analysis method is used for auxiliary verification.

[0020] The batch precision construction method for large-scale walking-type cold bed group foundation piers proposed in this invention has the following improvements and advantages over the traditional method of multiple decentralized layout and multiple decentralized pouring:

[0021] Before and after the overall raft foundation pouring, precise measurement and overall positioning techniques were employed in stages and batches. Two precise measurements ensured that the position and dimensions of each foundation pier strictly met design requirements, significantly improving construction accuracy compared to traditional single-stage overall layout. Simultaneously, a complete set of fixing frames was used to secure the formwork for all group equipment foundations of varying sizes and locations, effectively preventing displacement of the formwork during pouring and further ensuring the correct relative positions between foundation piers, thus improving construction quality.

[0022] This technical solution involves casting the foundation piers in batches according to their function and approximate dimensions. This batch casting method avoids the mutual interference that may occur with simultaneous casting, making the construction process smoother and improving construction efficiency. By optimizing the construction process, such as first measuring and positioning the entire structure, then installing the reinforcing steel and formwork, and finally casting in batches, the connection between each process is closer, reducing waiting time and thus shortening the overall construction cycle.

[0023] The significantly improved construction precision of the foundation piers ensured the accurate installation of each individual unit on the cooling bed, effectively preventing installation problems caused by foundation pier position deviations. Furthermore, the high-precision foundation pier construction reduced the need for secondary processing or adjustments during subsequent installation, lowering installation difficulty and costs.

[0024] This technical solution is highly adaptable, enabling batch measurement, positioning, and pouring of foundation piers with different functions and dimensions. This flexibility allows the technology to easily meet the complex and varied structural requirements of large-scale walking beam cooling beds.

[0025] In summary, the batch precision construction method for the foundation piers of large-scale walking-beam cooling beds proposed in this invention not only solves the problems of low construction accuracy and efficiency in traditional construction methods, but also provides strong technical support for the overall construction of large-scale walking-beam cooling beds by improving construction accuracy, increasing construction efficiency, ensuring smooth subsequent installation, and providing strong adaptability. Attached Figure Description

[0026] Figure 1 This is a construction sequence diagram of the construction method shown in this invention. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.

[0028] like Figure 1 A method for batch and precise construction of large-scale walking-type cold bed group foundation piers, comprising: Step 1: Measurement and positioning of the overall raft foundation: Based on the design dimensions in the construction drawings, the overall raft foundation of the large walking bed is precisely measured and positioned to ensure the accurate location of the overall raft foundation.

[0029] Step 2: Installation of reinforcement, formwork, and embedded parts for the overall raft foundation: After Step 1 is completed, install the reinforcement, formwork, and embedded parts for the overall raft foundation to prepare for concrete pouring.

[0030] Step 3: Conduct the first precise measurement and overall positioning of the foundation piers of group equipment such as fixed beams, movable beams, lateral transmission, and lifting transmission in batches according to different functions and approximate external dimensions: After Step 2 is completed, according to different functions and approximate external dimensions, multiple fixed beam foundation piers are grouped into one foundation pier group, multiple movable beam foundation piers are grouped into one foundation pier group, multiple lateral transmission foundation piers are grouped into one foundation pier group, and multiple lifting transmission foundation piers are grouped into one foundation pier group. The overall measurement and positioning of the foundation pier groups are carried out in batches. After the overall measurement and positioning of different batches of foundation pier groups is completed, the overall measurement and verification of different batches of foundation pier groups are carried out to ensure the accuracy of the relative positional relationship between all foundation pier groups and the foundation pier groups.

[0031] Step 4: Install reinforcing bars for the foundation piers of group equipment such as fixed beams, movable beams, lateral transmission, and lifting transmission in batches: After Step 3 is completed, install reinforcing bars for the foundation piers of group equipment such as fixed beams, movable beams, lateral transmission, and lifting transmission. Ensure that the reinforcing bars are installed in the correct positions and are firmly tied to prevent disturbance of the reinforcing bars during the overall raft slab pouring process.

[0032] Step 5: Overall raft foundation pouring: After step 4 is completed, the overall raft foundation is poured on the cooling bed. During the pouring process, it is forbidden to disturb the fixed beams, movable beams, transverse transmission, lifting transmission and other group equipment foundation pier reinforcement bars that have been positioned.

[0033] Step 6: Conduct a second precise measurement and overall positioning of the foundation piers for groups of equipment such as fixed beams, movable beams, lateral transmission, and lifting transmission in batches according to different functions and approximate external dimensions: After Step 5 is completed, group multiple fixed beam foundation piers into one foundation pier group, multiple movable beam foundation piers into one foundation pier group, multiple lateral transmission foundation piers into one foundation pier group, and multiple lifting transmission foundation piers into one foundation pier group. Perform overall measurement and positioning of the foundation pier groups in batches. After the overall measurement and positioning of different batches of foundation pier groups is completed, remeasure and verify the different batches of foundation pier groups as a whole to ensure the accuracy of the relative positional relationships between all foundation pier groups.

[0034] Step 7: Install the reinforcement, formwork, and embedded parts of the foundation piers for group equipment such as fixed beams, movable beams, lateral transmission, and lifting transmission in batches: After Step 6 is completed, install the reinforcement, formwork, and embedded parts of the foundation piers for group equipment such as fixed beams, movable beams, lateral transmission, and lifting transmission. At this time, the installation is to connect the insert bars in Step 4. If the insert bars are found to be disturbed, the reinforcement installation in this step needs to be readjusted and positioned.

[0035] Step 8: Install the complete set of fixing frames for the foundation pier formwork of the group equipment, including fixed beams, movable beams, lateral transmission, and lifting transmission in batches: After completing Step 7, install the complete set of fixing frames for the foundation pier formwork of the group equipment, including fixed beams, movable beams, lateral transmission, and lifting transmission. Use the complete set of fixing frames to fix all the foundation formwork of different sizes and positions, ensuring the correct relative positions between the foundations and good construction quality. During the process, the installation formula for the complete set of fixing frames for the group equipment foundation pier formwork is used for calculation and design assistance. This formula comprehensively considers the size, shape, and weight of the foundation pier, as well as the material and thickness of the formwork, and through precise mathematical calculations, derives the optimal layout, material specifications, and connection method of the fixing frames.

[0036] In practice, a set of fixing frames can be customized based on the calculation results of the formula to ensure that they can firmly fix the foundation templates of all groups of equipment of different sizes and positions, and prevent displacement or deformation during the pouring process.

[0037] During installation, it should be ensured that the installation position, angle, and tightness of the fixing frame meet the design requirements, thereby guaranteeing the correct relative position between the foundations of the group of equipment and the construction quality.

[0038] Step 9: Phased Casting of Foundation Piers for Group Equipment (Fixed Beams, Movable Beams, Lateral Transmission, Lifting Transmission, etc.): After Step 8 is completed, the foundation piers for group equipment (fixed beams, movable beams, lateral transmission, lifting transmission, etc.) are cast in phases. This phased casting of the group equipment foundations (fixed beams, movable beams, lateral transmission, lifting transmission, etc.) prevents simultaneous casting from interfering with each other, resulting in high construction efficiency.

[0039] As can be seen from the above embodiments, the batch precision construction method for large-scale step-type cold bed group foundation piers proposed in this invention has the following characteristics: 1. Refined Batch Processing: The construction method adopted the principles of functional classification and approximate external dimensions to scientifically and rationally process the foundation piers in batches. This strategy not only improved the efficiency of construction organization but also ensured that each batch of foundation piers received refined processing, thereby enhancing the overall construction accuracy.

[0040] 2. Systematic Construction Process: From the measurement and positioning of the overall raft foundation to the phased pouring and shaping of the foundation piers, the construction method forms a complete and systematic process. Each step is closely linked and logically clear, ensuring the continuity and efficiency of the construction.

[0041] 3. Innovative Technology Application: The construction method incorporates an innovative complete set of fixing frame designs, specifically addressing the formwork fixing issues of group equipment foundation piers. This design not only improves the stability of the formwork but also greatly simplifies the construction process, demonstrating the important role of technological innovation in construction.

[0042] 4. Strict quality control: Through precise measurement, positioning, and installation procedures, as well as strict construction specifications, the construction methods ensure that every step meets the design requirements, thereby guaranteeing the overall construction quality.

[0043] Furthermore, the batch precision construction method for large-scale walking-type cold bed group foundation piers proposed in this invention has the following advantages compared with traditional construction methods: 1. Significantly Improved Construction Efficiency: Batch processing and a systematic construction workflow greatly shorten the construction cycle and improve construction efficiency. At the same time, the innovative complete set of fixing frames also reduces waiting and adjustment time during construction.

[0044] 2. Ensure stable construction quality: Strict quality control and meticulous construction procedures ensure that each foundation pier meets the design requirements, thereby guaranteeing the stability of the overall construction quality.

[0045] 3. Reduced construction costs and risks: Systematic construction methods and innovative frame designs reduce material waste and repetitive labor, thus lowering construction costs. At the same time, strict construction standards also reduce safety and quality risks during the construction process.

[0046] 4. Improved Construction Flexibility and Adaptability: The phased processing strategy in the construction method makes construction more flexible, allowing for targeted treatment based on different types of foundation piers. Simultaneously, the design of the complete set of fixing frames can be adjusted according to actual conditions, further enhancing construction adaptability.

[0047] In summary, this invention, with its refined batch processing, systematic construction process, innovative technology application, and strict quality control, as well as its advantages of significantly improving construction efficiency, ensuring stable construction quality, reducing construction costs and risks, and enhancing construction flexibility and adaptability, provides strong technical support and guarantee for the construction of large industrial equipment.

[0048] The above are merely embodiments provided in this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for batch and precise construction of large-scale walking-beam cold-bed group foundation piers, characterized in that, Includes the following steps: Step 1: Measure and position the overall raft foundation to ensure accurate foundation location; Step 2: Install the reinforcement, formwork, and embedded parts of the overall raft foundation to prepare for pouring; Step 3: Based on the principle of similar function and external dimensions, divide the foundation piers of the group equipment into foundation piers of fixed beam equipment, foundation piers of movable beam equipment, foundation piers of transverse transmission equipment, and foundation piers of lifting transmission equipment. Then, conduct the first accurate measurement and overall positioning, and at the same time, check and correct the relative positions between each group of piers. Step 4: Install the reinforcing bars for each group of piers in batches, ensuring accurate positioning and secure binding; Step 5: Pour the overall raft foundation, avoiding disturbing the reinforcing bars during the process; Step 6: After pouring, conduct a second precise measurement and overall positioning based on the principle of approximate function and external dimensions, and verify and correct the relative positions between each group of piers; Step 7: Install the reinforcing bars, formwork, and embedded parts for each group of piers in batches, connect the dowel bars and ensure that the positions are correct; Step 8: Secure all pier formwork using a complete set of fixing frames to ensure correct relative positioning; Step 9: Cast each group of piers in batches and independently to prevent mutual interference and improve construction efficiency; The precise measurement employs three-dimensional laser scanning technology combined with GPS positioning; the overall positioning establishes a three-dimensional coordinate system and optimizes the layout of the piers using a mathematical model, ensuring that the positioning accuracy is more than 20% higher than that of traditional methods.

2. The method for batch and precise construction of large-scale walking-type cold bed group foundation piers according to claim 1, characterized in that, The first and second precise measurements also included using a total station to verify key control points and ensure measurement accuracy.

3. The method for batch and precise construction of large-scale walking-type cold bed group foundation piers according to claim 1, characterized in that, The design of the complete set of fixing frames needs to take into account the size, shape and spatial relationship of the piers, and determine the structure and material of the complete set of fixing frames through mechanical calculations to ensure the fixing effect.

4. The method for batch and precise construction of large-scale walking-type cold bed group foundation piers according to claim 1, characterized in that, During the pouring of the overall raft foundation, temperature control and pre-set vibration schemes are adopted to ensure uniform concrete quality and reduce crack formation.

5. The method for batch and precise construction of large-scale walking-type cold bed group foundation piers according to claim 1, characterized in that, In the process of pouring each group of piers in batches, the formwork must be cleaned and moistened before each batch of pouring to improve the adhesion between the concrete and the formwork.

6. The method for batch and precise construction of large-scale walking-type cold bed group foundation piers according to claim 1, characterized in that, The design of the complete set of fixing frames needs to consider the size, shape, and spatial relationship of the piers. The structure and materials of the fixing frames are determined through the following steps and mechanical calculation formulas to ensure their fixing effect: S1, Force Analysis: A stress analysis was performed on the fixed frame to identify the main types of loads it bears, including static loads consisting of the self-weight of the formwork, reinforcing bars, and concrete, as well as dynamic loads consisting of vibration force and wind force during the pouring process. S2. Material Selection: Based on the stress analysis results, materials with sufficient strength and rigidity are selected as the components of the fixing frame, including steel, aluminum alloy, or wood. S3. Structural Design: When designing the structure of the fixing frame, it is necessary to ensure that it can stably support the formwork and resist the action of various loads; the structural design should include the design of the connectors to ensure a firm connection between the fixing frame and the formwork. S4. Mechanical Calculations: When performing mechanical calculations, the strength, stiffness, and stability of the fixing frame must be considered; the specific calculation methods and formulas are as follows: S4.1 Strength Calculation: The stress formula in mechanics of materials is used to calculate the stress value of the fixing frame when it is subjected to the maximum load, ensuring that it does not exceed the allowable stress of the material; the formula is: σ = F / A, where σ is the stress, F is the load, and A is the area of ​​force application; S4.2 Stiffness Calculation: Calculate the deformation of the fixed frame under load to ensure that the deformation is within the allowable range; the formula is: δ = FL³ / (3EI), where δ is the deformation, F is the load, L is the span, E is the elastic modulus, and I is the moment of inertia of the section. S4.3 Stability Calculation: For slender rods, stability checks are required to prevent instability. The formula is: Pcr = (π²EI) / L², where Pcr is the critical buckling force, E is the elastic modulus, I is the moment of inertia of the section, and L is the length of the rod. S5. Verification and validation: After completing the mechanical calculations, the design of the fixing frame needs to be checked and verified to ensure that it meets the construction requirements; the finite element analysis method is used for auxiliary verification.

Images