Construction method for load bearing of large modular foundation

Abstract

The invention relates to a construction method for bearing a large modular foundation. The construction method comprises the steps that bottom supporting steel plates are laid and leveled; mounting a transportation bracket; connecting the transportation bracket; selecting material specifications according to the total weight of the modules; calculating the bearing capacity of the foundation; and according to a calculation result, constructing according to the graph. According to the invention, the problems of long construction period, high cost, complex process, difficulty in dismantling, poor environmental protection property and the like in the traditional piling foundation bearing technology are effectively solved. Through standardized construction steps and detailed stress calculation, the construction efficiency is improved, and the safety and stability of the structure are ensured.

Description

Technical Field

[0001] This invention relates to the field of civil engineering, specifically to a construction method for large-scale modular foundation load-bearing. Background Technology

[0002] In the field of civil engineering, especially in the construction of large modular projects, foundation load-bearing capacity is a crucial factor in ensuring structural safety and stability. With the continuous innovation of modern building technology and the increasing demands for construction efficiency, traditional piling methods are gradually revealing their limitations in addressing the load-bearing challenges of large modular foundations. Traditional techniques primarily rely on piling to solve load-bearing problems; however, this method has the following issues: Long construction period: Piling construction requires a significant amount of time, with a complete construction cycle estimated to take approximately two months. This not only substantially extends the overall project duration but also increases time costs and management complexity.

[0003] High resource consumption: Piling construction requires a significant investment of human and material resources, including professional construction teams, piling equipment, and large quantities of building materials. This not only increases the direct costs of the project but may also have a negative impact on the surrounding environment.

[0004] Poor flexibility: When faced with different geological conditions and load-bearing requirements, traditional piling methods often require adjustments to the construction plan, or even redesign of the pile foundation. This lack of flexibility limits its application in complex and ever-changing engineering environments.

[0005] Poor environmental performance: The noise, vibration and dust pollution generated during the pile driving process have an adverse impact on the surrounding environment and do not meet the strict requirements of modern architecture for environmental protection and sustainable development. Summary of the Invention

[0006] This invention aims to overcome the shortcomings of existing technologies and provide a construction method for large-scale modular foundation load-bearing. To solve the above-mentioned technical problems, the present invention is implemented as follows: A construction method for large modular foundation load-bearing, characterized by comprising the following steps: Bottom support steel plate laying and leveling: Use support steel plates to level the ground and ensure that all modules have support steel plates at the bottom of the transport brackets to ensure uniform stress. The steel plates do not need to be fully laid. Install the transport bracket: Install the transport bracket at the bottom of the module into place; Connecting the transport support: The transport support is connected using horizontal beams and diagonal braces by welding. After connection, the bearing capacity of the foundation of the bottom transport support will be increased. Select material specifications based on the total weight of the module: Select the specifications of horizontal beams and diagonal braces based on the total weight of the module; Calculate the bearing capacity of the foundation: Calculate the bearing capacity of the foundation based on the total weight of the module, the number of bottom supports, and the stress conditions; Construction according to the drawings: Based on the calculation results, construction shall be carried out according to the drawings.

[0007] The construction method for a large modular foundation bearing system is characterized in that the formula for verifying the bearing capacity of the foundation under axial load is as follows: pk = (Fk + Gk) / A in: Where pk is the pressure per unit area of ​​the foundation, Fk is the reduced vertical load, Fk = F / Ks, where F is the vertical load and Ks is the reduction factor; Gk is the self-weight of the foundation and the weight of the overlying soil, Gk = γ × A × d, where γ is the average unit weight of the foundation and the overlying soil, d is the foundation depth, and A is the base area of ​​the foundation. Formula for verifying the magnification angle of a rigid foundation: H0 ≥ (b - b0) / (2 × tanα) Where H0 is the base height, b is the base width, b0 is the base effective width, and α is the allowable value for the base step width-to-height ratio.

[0008] The construction method for a large modular foundation bearing system is characterized in that: in the calculation of the bearing capacity of the foundation under axial load, it is necessary to ensure that the calculated pressure per unit area of ​​the foundation pk is less than or equal to the corrected characteristic value of the foundation bearing capacity fa, so as to meet the requirements of the foundation bearing capacity.

[0009] The construction method for a large modular foundation load-bearing structure is characterized in that: in the calculation of the amplified angle of the rigid foundation, it is necessary to ensure that the foundation height H0 is greater than or equal to (b - b0) / (2 × tanα) to meet the requirements of the width-to-height ratio of the rigid foundation.

[0010] The aforementioned large modular foundation load-bearing support structure is characterized by comprising: Bottom transport bracket of the module: Serves as the basic support structure of the module and is used to bear the weight of the module itself; Horizontal beam: Used to connect the bottom transport bracket of the module, enhance the stability between the brackets, and distribute the load; Diagonal bracing: Used to further enhance the stability of the support structure and prevent it from tilting or deforming under stress; Supporting steel plate: laid between the ground and the bottom transport support of the module to level the ground, increase the bearing area, and improve the overall load-bearing capacity.

[0011] The construction method for a large modular foundation is characterized in that: all steel materials are at least Q235B to ensure the strength and reliability of the materials.

[0012] The construction method for a large modular foundation load-bearing structure is characterized in that: the laying of supporting steel plates must ensure that the bottom of all module transport supports has supporting steel plates, and the steel plates do not need to be fully laid.

[0013] The construction method for a large modular foundation load-bearing structure is characterized in that: the horizontal beam is made of H-beams and the diagonal braces are made of channel steel.

[0014] The beneficial effects of this invention are as follows: As can be seen from the above technical solution, this application provides a construction method for large-scale modular foundation bearing. Traditional pile foundation bearing technology typically requires about two months to construct, while this invention, by employing a steel structure support and connecting beams, can significantly shorten the construction period while ensuring structural safety. For example, in practical applications, compared to traditional methods, the construction period of this invention is shortened by approximately one month, which is a significant advantage for projects with tight schedules.

[0015] The construction technology of this invention not only shortens the construction period but also significantly reduces construction costs. Traditional piling technology requires a large amount of specialized equipment and personnel, resulting in high equipment rental and labor costs. This invention, by optimizing the construction process, reduces reliance on specialized equipment and personnel, thereby lowering construction costs.

[0016] The construction technology of this invention is simple to operate, the construction process is standardized, and it is easy to implement. With detailed construction drawings and stress calculations, construction personnel can complete the construction task quickly and accurately, improving construction efficiency. Furthermore, the supporting structure of this invention is rationally designed, easy to install and disassemble, further improving construction flexibility and efficiency.

[0017] This invention increases the overall bearing capacity by increasing the ground bearing area, thus ensuring the stability of the modular structure. Through detailed stress calculations and rigorous construction acceptance, this invention can effectively address the weight distribution of different modules and the bearing capacity requirements of the foundation, ensuring the safety and stability of the structure.

[0018] The supporting structure of this invention is easy to dismantle after project completion, and the dismantled materials can be reused, reducing resource waste. This reusable characteristic not only reduces construction costs but also meets the requirements of sustainable development in modern building construction.

[0019] The modular foundation load-bearing construction technology of this invention has many beneficial effects, including significantly shortening the construction cycle, greatly reducing costs, improving construction efficiency, enhancing structural stability, improving environmental friendliness, and facilitating dismantling and reuse. These advantages make this invention widely applicable and of significant practical importance in large-scale modular construction projects. Attached Figure Description

[0020] 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 supporting structure.

[0021] Figure 2 This is a schematic diagram of the module calculation. Detailed Implementation

[0022] 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. like Figure 1 As shown: A large modular foundation load-bearing support structure, which includes: Bottom transport bracket of the module: Serves as the basic support structure of the module and is used to bear the weight of the module itself; Horizontal beam: Used to connect the bottom transport bracket of the module, enhance the stability between the brackets, and distribute the load; Diagonal bracing: Used to further enhance the stability of the support structure and prevent it from tilting or deforming under stress; Supporting steel plate: laid between the ground and the bottom transport support of the module to level the ground, increase the bearing area, and improve the overall load-bearing capacity.

[0023] The ground is leveled using supporting steel plates. After the bottom transport bracket of the module is installed in place, horizontal beams and diagonal braces are used to connect the bottom transport bracket of the module. The connection method is welding. After connection, the foundation bearing capacity of the bottom transport bracket will be increased.

[0024] The specific construction process is as follows: 1. Lay and level the bottom support steel plate (Note: In order to ensure uniform stress, all modules must have a support steel plate at the bottom of the support bracket. The steel plate does not need to be fully laid).

[0025] 2. The specifications of the horizontal beams and diagonal braces should be considered based on the total weight of the module. Below, we use H200A H-beams for the horizontal beams and UPN180 channel steel for the diagonal braces. There are no fixed requirements for dimensions, and material selection is not mandatory, but the minimum material requirement is Q235B.

[0026] 3. Calculate whether the foundation bearing capacity meets the requirements: Take three working conditions as examples: Module A (total weight 1000 tons, number of bottom support structures 28), Module B (total weight 400 tons, number of bottom support structures 16, with 10 as the main load-bearing structures), and Module C (total weight 600 tons, number of bottom support structures 15).

[0027] 4. Based on the calculation results, carry out the construction according to the drawings.

[0028] Module A: The total weight is 1000 tons (28 supporting structures). The self-weight of the modules is evenly distributed, and the load of each column is 35.7 tons. According to the cross-section, each column has rigid supports on both sides, which can evenly bear the vertical load. Moreover, there are two HW200X200 connecting beams between the columns. In addition, considering the cantilever bearing length of the connecting beam 6h, the H-beams can be assumed to be rigid strip foundations. Based on the thickness of the ground, the thickness of the pad plate and the thickness of the water stabilization layer, the width of the strip foundation is considered to be 2000.

[0029] 1. Design materials Foundation type: Rigid foundation Calculation method: Verification of cross-sectional dimensions like Figure 2 As shown: Known dimensions: B1 = 1000 (mm), B = 710 (mm) H1 = 800 (mm) Burial depth d = 900 (mm) as = 80 mm Reduction factor: Ks = 1.35 Load data (per linear meter): Vertical load F = 1000 * 10 / 14 / 4 = 179.00 kN / m M = 0.00kN·m V = 0.00kN 2. Design value of bending moment acting at the bottom of the foundation M0 = M + V×d = 0.00 + 0.00×0.90 = 0.00kN·m 3. Correct the bearing capacity of the foundation The corrected characteristic value of the foundation bearing capacity is fa = 100.00 kPa. 4. Verification of foundation bearing capacity under axial load According to the "Code for Design of Building Foundations" (GB50007-2011) pk = (Fk + Gk) / A (5.2.2-1) Where: A = 1.00 × 2.00 = 2.00m 2 Fk = F / Ks = 179.00 / 1.35 = 132.59kN Gk = 20.0 × A × d = 20.0 × 2.00 × 900 = 36.00kN pk = (Fk + Gk) / A = (132.59 + 36.00) / 2.00 = 84.30 kPa ≤ fa = 100.00 kPa. The requirement is met.

[0030] 5. Verification of enlarged angle of rigid foundation Calculation formula: Verify the calculation using the following formulas from the "Code for Design of Building Foundations" (GB50007-2011): H0 ≥ (b - b0) / 2tana (8.1.1) Verify the width-to-height ratio of the rigid concrete foundation: pk = 84.30 kPa ≤ 200 kPatana = 1.00 (b - b0) / (2×tana) = (2.00-0.71) / (2×1.00) = 0.65 m ≤ H1 = 0.80m. The requirement is met.

[0031] Module B: The total weight is 400 tons (16 support legs, 10 of which are mainly load-bearing). The self-weight of the module is evenly distributed, and the load of each column is 40 tons. According to the cross-section, each column has rigid supports on both sides, which can evenly bear the vertical load. Moreover, there are two HW200X200 connecting columns. In addition, considering the cantilever bearing length of the connecting beam 6h, the H-beam can be assumed to be a rigid strip foundation. Based on the thickness of the ground, the thickness of the pad plate and the thickness of the water stabilization layer, the width of the strip foundation is considered to be 2000.

[0032] 1. Design materials Foundation type: Rigid foundation Calculation method: Verification of cross-sectional dimensions like Figure 2As shown: Known dimensions: B1 = 1000 (mm), B = 710 (mm) H1 = 800 (mm) Burial depth d = 900 (mm) as = 80 mm Reduction factor: Ks = 1.35 Load data (per linear meter): Vertical load F = 400 * 10 / 10 * 2.8 = 143.00 kN / m M = 0.00kN·m V = 0.00kN 2. Design value of bending moment acting at the bottom of the foundation M0 = M + V×d = 0.00 + 0.00×0.90 = 0.00kN·m 3. Correct the bearing capacity of the foundation The corrected characteristic value of the foundation bearing capacity is fa = 100.00 kPa. 4. Verification of foundation bearing capacity under axial load According to the "Code for Design of Building Foundations" (GB50007-2011) pk = (Fk + Gk) / A (5.2.2-1) Where: A = 1.00 × 2.00 = 2.00 m2 Fk = F / Ks = 143.00 / 1.35 = 105.93kN Gk = 20.0 × A × d = 20.0 × 2.00 × 900 = 36.00kN pk = (Fk + Gk) / A = (105.93 + 36.00) / 2.00 = 70.96 kPa ≤ fa = 100.00 kPa. The requirement is met.

[0033] 5. Verification of enlarged angle of rigid foundation Calculation formula: Verify the calculation using the following formulas from the "Code for Design of Building Foundations" (GB50007-2011): H0 ≥ (b - b0) / 2tana (8.1.1) Verify the width-to-height ratio of the rigid concrete foundation: pk = 70.96 kPa ≤ 200 kPatana = 1.00 (b - b0) / (2×tana) = (2.00-0.71) / (2×1.00) = 0.65 m ≤ H1 = 0.80 m. The requirement is met.

[0034] C module: The total weight is 600 tons (15 support legs). The module's self-weight is evenly distributed, and each column has a load of 40 tons. According to the cross-section, each column has rigid supports on both sides, which can evenly bear the vertical load. Moreover, there are two HW200X200 connecting beams between the columns. In addition, considering the cantilever bearing length of the connecting beam 6h, the H-beams can be assumed to be rigid strip foundations. Based on the thickness of the ground, the thickness of the pad plate, and the thickness of the water stabilization layer, the strip foundation width is considered to be 2000 mm.

[0035] Foundation type: Rigid foundation Calculation method: Verification of cross-sectional dimensions like Figure 2 As shown: Known dimensions: B1 = 1000 (mm), B = 710 (mm) H1 = 800 (mm) Burial depth d = 900 (mm) as = 80 mm Reduction factor: Ks = 1.35 Load data (per linear meter): Vertical load F = 600 * 10 / 15 / 2.8 = 143.00 kN / m M = 0.00kN·m V = 0.00kN 2. Design value of bending moment acting at the bottom of the foundation M0 = M + V×d = 0.00 + 0.00×0.90 = 0.00kN·m 3. Correct the bearing capacity of the foundation The corrected characteristic value of the foundation bearing capacity is fa = 100.00 kPa. 4. Verification of foundation bearing capacity under axial load According to the "Code for Design of Building Foundations" (GB50007-2011) pk = (Fk + Gk) / A (5.2.2-1) Where: A = 1.00 × 2.00 = 2.00 m2 Fk = F / Ks = 143.00 / 1.35 = 105.93kN Gk = 20.0 × A × d = 20.0 × 2.00 × 900 = 36.00kN pk = (Fk + Gk) / A = (105.93 + 36.00) / 2.00 = 70.96 kPa ≤ fa = 100.00 kPa. The requirement is met.

[0036] 5. Verification of enlarged angle of rigid foundation Calculation formula: Verify the calculation using the following formulas from the "Code for Design of Building Foundations" (GB50007-2011): H0 ≥ (b - b0) / 2tana (8.1.1) Verify the width-to-height ratio of the rigid concrete foundation: pk = 70.96 kPa ≤ 200 kPatana = 1.00 (b - b0) / (2×tana) = (2.00-0.71) / (2×1.00) = 0.65 m ≤ H1 = 0.80 m. The requirement is met.

[0037] This embodiment's modular support system employs a steel structure bearing system supplemented by steel connecting beams. By increasing the ground bearing area, the overall load-bearing capacity is improved. Optimized module design and calculation methods enhance construction efficiency and quality. Specifically, precise calculations of the load and foundation bearing capacity of each module ensure safe and efficient construction; the selection of appropriate steel specifications and materials enhances structural stability and durability; and strict construction procedures and acceptance standards ensure project safety and quality. Compared to traditional construction techniques, this embodiment saves approximately one month of construction time, approximately 800,000 yuan in site rental and pile foundation construction costs, while simultaneously improving overall load-bearing capacity, shortening the construction period, facilitating demolition, and improving environmental friendliness.

[0038] 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 construction method for large modular foundation load-bearing, characterized in that... It includes the following steps: Bottom support steel plate laying and leveling: Use support steel plates to level the ground and ensure that all modules have support steel plates at the bottom of the transport brackets to ensure uniform stress. The steel plates do not need to be fully laid. Install the transport bracket: Install the transport bracket at the bottom of the module into place; Connecting the transport support: The transport support is connected using horizontal beams and diagonal braces by welding. After connection, the bearing capacity of the foundation of the bottom transport support will be increased. Select material specifications based on the total weight of the module: Select the specifications of horizontal beams and diagonal braces based on the total weight of the module; Calculate the bearing capacity of the foundation: Calculate the bearing capacity of the foundation based on the total weight of the module, the number of bottom supports, and the stress conditions; Construction according to the drawings: Based on the calculation results, construction shall be carried out according to the drawings.

2. The construction method for a large modular foundation bearing system according to claim 1, characterized in that, The formula for verifying the bearing capacity of the foundation under axial load is as follows: pk = (Fk + Gk) / A in: Where pk is the pressure per unit area of ​​the foundation, Fk is the reduced vertical load, Fk = F / Ks, where F is the vertical load and Ks is the reduction factor; Gk is the self-weight of the foundation and the weight of the overlying soil, Gk = γ × A × d, where γ is the average unit weight of the foundation and the overlying soil, d is the foundation depth, and A is the base area of ​​the foundation. Formula for verifying the magnification angle of a rigid foundation: H0 ≥ (b - b0) / (2 × tanα) Where H0 is the base height, b is the base width, b0 is the base effective width, and α is the allowable value for the base step width-to-height ratio.

3. The construction method for a large modular foundation bearing system according to claim 2, characterized in that: In the verification of foundation bearing capacity under axial load, it is necessary to ensure that the calculated pressure per unit area of ​​the foundation, pk, is less than or equal to the corrected characteristic value of foundation bearing capacity, fa, so as to meet the requirements of foundation bearing capacity.

4. The construction method for a large modular foundation bearing system according to claim 3, characterized in that: In the calculation of the amplified angle of the rigid foundation, it is necessary to ensure that the foundation height H0 is greater than or equal to (b - b0) / (2 × tanα) to meet the requirements of the width-to-height ratio of the rigid foundation.

5. The large modular foundation load-bearing support structure according to claim 1, characterized in that... It includes: Bottom transport bracket of the module: Serves as the basic support structure of the module and is used to bear the weight of the module itself; Horizontal beam: Used to connect the bottom transport bracket of the module, enhance the stability between the brackets, and distribute the load; Diagonal bracing: Used to further enhance the stability of the support structure and prevent it from tilting or deforming under stress; Supporting steel plate: laid between the ground and the bottom transport support of the module to level the ground, increase the bearing area, and improve the overall load-bearing capacity.

6. The construction method for a large modular foundation bearing system according to claim 5, characterized in that: All steel materials must be at least Q235B to ensure strength and reliability.

7. The construction method for a large modular foundation bearing system according to claim 5, characterized in that: The laying of supporting steel plates must ensure that all modules have supporting steel plates at the bottom of the transport brackets, and the steel plates do not need to be fully laid.

8. The construction method for a large modular foundation bearing system according to claim 5, characterized in that: The horizontal beams are made of H-beams, and the diagonal braces are made of channel steel.

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