A research method for the size effect of foundation reinforcement bag components

Abstract

This invention discloses a research method for the size effect of bag-type components in foundation reinforcement, relating to the field of environmental geotechnical engineering technology. The method includes: establishing a theoretical model of the soil bag based on the mechanical principles of soil bag foundation reinforcement; deriving the theoretical relationship between the soil and the soil bag, using the UH constitutive model to describe the stress-strain relationship of the soil, and analyzing the influence of the radius r and height H of the soil bag on its strength and deformation; studying the influence of size on the mechanical properties of a single soil bag through finite element simulation; constructing a foundation reinforcement structure, studying the effect and extent of size on soil bag treatment of the foundation under combined forms, and finding the optimal size that balances mechanical performance and economic benefits. This invention's research method for the size effect of bag-type components in foundation reinforcement provides a practical basis for improving foundation reinforcement technology, can improve foundation bearing capacity and reduce deformation, and has the advantages of being economical, environmentally friendly, energy-saving, and material-reducing.

Description

Technical Field

[0001] This invention relates to the field of environmental geotechnical engineering technology, and in particular to a research method for the size effect of foundation reinforcement bag components. Background Technology

[0002] Foundation reinforcement bag components, commonly known as ground anchors or soil bags, are flexible structures made of high-strength synthetic fiber materials. This material not only possesses excellent durability and tensile strength but also adapts to various complex terrain conditions and uneven settlement, exhibiting superior stability under stress. By filling with sand or other types of soil materials, these bag components can significantly improve the shear strength of the internal filling, thereby enabling the entire structure to withstand greater longitudinal loads. This is crucial for ensuring the long-term stability and safety of engineering projects.

[0003] As modern engineering projects continue to expand in scale and their applications become increasingly diverse, the application scope of ground anchors is also continuously expanding. Today, they are not only widely used in traditional civil and environmental engineering projects, such as foundation reinforcement, vibration reduction, slope protection, and dam repair, but also play a crucial role in extreme environments such as earthquake-resistant engineering and marine engineering. Especially in earthquake-prone areas or offshore platform construction where extreme natural conditions must be faced, soil bags have become an indispensable key material due to their unique physical properties.

[0004] In practical engineering, soil bags must be able to maintain their functional effectiveness over long periods, especially in projects facing harsh environments. This requires them not only to have sufficient strength to enhance soil stability, control settlement, and resist shear failure, but also to withstand the effects of natural factors such as weathering and corrosion. Therefore, the strength characteristics of soil bags are directly related to the safety and durability of the entire project.

[0005] It is worth noting that the size design of soil bags has a significant impact on their final performance. Appropriate dimensions not only optimize load-bearing capacity and reduce deformation, but also effectively control construction costs. Sizes that are too small may fail to provide the necessary support, while sizes that are too large may lead to unnecessary material waste. Therefore, studying the "size effect" is crucial for determining the optimal design. By deeply analyzing the mechanical behavior of soil bags at different sizes, researchers can provide designers with more accurate and reliable design parameters, thereby ensuring that engineering structures maintain good safety and stability under various working conditions. Furthermore, research on the "size effect" also helps to promote advancements in material formulation and construction techniques. A deeper understanding of material properties allows for the development of a new generation of more efficient, economical, and environmentally friendly soil bag products. Simultaneously, a profound understanding of the soil bag size effect can also improve existing construction processes, achieve rational resource utilization, reduce overall project investment, and promote sustainable development. Summary of the Invention

[0006] The purpose of this invention is to propose a research method for the size effect of foundation reinforcement bag components. This method can not only provide designers with more reliable design parameters to ensure the safety and stability of engineering structures under various working conditions, but also help optimize material formulations and construction processes, reduce engineering investment, and promote sustainable development.

[0007] To achieve the above objectives, this invention proposes a method for studying the size effect of foundation reinforcement bag-type components, the steps of which are as follows:

[0008] S1. Based on the mechanical principles of soil bag foundation reinforcement, establish a theoretical model of soil bags;

[0009] S2. Derive the theoretical relationship between the soil and the soil bag, use the UH model to describe the stress-strain calculation relationship of the soil, and analyze the influence of the radius and height of the soil bag on the bearing capacity and deformation of the soil bag.

[0010] S3. The influence of size on the mechanical properties of a single soil bag is studied through finite element simulation.

[0011] S4. Construct a foundation reinforcement structure, study the effect and extent of soil bag treatment on the foundation under the combination form, and find the optimal size that takes into account both mechanical performance and economic benefits.

[0012] Preferably, in S1, assuming the soil bag is cylindrical and the soil is constrained by the soil bag, the formula for calculating the lateral stress generated by the soil under constraint, based on the mechanical principle of soil bag foundation reinforcement, is as follows:

[0013]

[0014] Where, σ rdenoted as lateral stress, T is the constraint tension of the soil bag on the soil, H is the height of the soil bag, and r is the radius of the soil bag.

[0015] Preferably, the formula for calculating the constraint tension T of the soil bag on the soil is as follows:

[0016] T = 2πE b π(r-r0)=E b ·2π·Δr;

[0017] Among them, E b Let r be the elastic modulus of the soil bag, r0 be the initial radius of the soil bag, and Δr be the change in radius of the soil bag.

[0018] Preferably, in S2, the UH model is used to describe the deformation characteristics of the soil. The deformation compatibility relationship of the soil bag theoretical model is substituted into the incremental form of the UH model to obtain the stress-strain calculation relationship of the UH model. Based on the stress-strain calculation relationship, the soil bag theory is derived by changing the size of the radius r and the height H, and the influence of the size effect on the strength and deformation of the soil bag is analyzed.

[0019] Preferably, in S3, based on the actual size of the soil bags, five sets of three-dimensional calculation model dimensions are established using ABAQUS finite element software. Their radii and heights are: 0.5m×0.5m, 0.75m×0.5m, 1m×0.5m, 0.5m×0.75m, and 0.5m×1m, respectively. The modulus of the soil bags is 5.35 GPa, Poisson's ratio is 0.3, thickness is 0.01m, and weight is 100g / m³. 2 Before calculation, confining pressure is applied to the three-dimensional calculation model, the influence of size effect on the strength and deformation of a single soil bag is analyzed, a size-related function is established, and the size equivalent parameters are obtained.

[0020] Preferably, in the finite element calculation of the ABAQUS finite element software, the soil material adopts the VMAT subroutine of the UH model. The UH model has been embedded in the numerical calculation software and used to analyze geotechnical engineering problems, which can provide a basis for the finite element calculation of the soil bag in this study.

[0021] Preferably, in S4, based on the actual soil bag structure of the project, a solid calculation model of multiple soil bags is combined in an alternating arrangement. The equivalent parameters related to the size of the individual soil bags obtained in S3 are used to construct the foundation reinforcement structure. By analyzing the effect and degree of soil bag treatment on the foundation under the combined form, the optimal size that takes into account both mechanical performance and economic benefits is found. This provides a practical basis for the improvement of foundation reinforcement technology, which can improve the bearing capacity of the foundation and reduce deformation, and has the advantages of being economical, environmentally friendly, energy-saving and material-reducing.

[0022] Therefore, this invention proposes a method for studying the size effect of foundation reinforcement bag-type components, the beneficial effects of which are as follows:

[0023] (1) The research method of the size effect of the foundation reinforcement bag component proposed in this invention is based on the performance of the soil bag under different working conditions. It proposes equivalent parameters related to the size of the soil bag, constructs the foundation reinforcement structure, and provides a practical basis for the improvement of foundation reinforcement technology. It can improve the bearing capacity of the foundation and reduce deformation, and has the advantages of being economical, environmentally friendly, energy-saving and material-reducing.

[0024] (2) The research method for the size effect of foundation reinforcement bag components proposed in this invention can not only provide designers with more reliable design parameters, but also help optimize material formulation and construction technology, and reduce project investment, etc.

[0025] (3) The research method of the size effect of the foundation reinforcement bag component proposed in this invention can select the most economical and reasonable size specification under the premise of ensuring mechanical performance, thereby reducing material costs; at the same time, the optimized design scheme can also reduce material waste in the construction process and further save project expenses.

[0026] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. Attached Figure Description

[0027] Figure 1 This is an overall flowchart of a research method for the size effect of a foundation reinforcement bag-type component according to the present invention;

[0028] Figure 2 This is a theoretical model diagram of a soil bag for a research method on the size effect of a foundation reinforcement bag component according to the present invention;

[0029] Figure 3 This is an axial stress-strain curve of a soil bag, representing a method for studying the size effect of a foundation reinforcement bag component according to the present invention.

[0030] Figure 4 This is a schematic diagram of a three-dimensional calculation model of a research method for the size effect of a foundation reinforcement bag-type component according to the present invention;

[0031] Figure 5 This is a triaxial compression simulation diagram of a soil bag, representing a research method for the size effect of a foundation reinforcement bag component according to the present invention.

[0032] Figure 6 This invention relates to a method for studying the size effect of bag-type components for foundation reinforcement, and presents a design drawing for foundation reinforcement using a combination of soil bags. Detailed Implementation

[0033] To make the technical solutions, advantages, and objectives of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below. The described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the protection scope of this application.

[0034] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0035] like Figure 1 As shown, this invention provides a method for studying the size effect of foundation reinforcement bag-type components, the specific steps of which are as follows:

[0036] S1. Based on the mechanical principles of soil bag foundation reinforcement, establish a theoretical model of soil bags.

[0037] like Figure 2 As shown, assuming the soil bag is cylindrical and the soil is constrained by the soil bag, the vertical principal stress of the soil element is σ1, and the lateral stress generated by the constraint of the soil is σ2=σ3=σ r According to the mechanical principles of soil-bag foundation reinforcement, the formula for calculating the lateral stress generated by soil under constraint is as follows:

[0038]

[0039] Where, σ r denoted as lateral stress, T is the constraint tension of the soil bag on the soil, H is the height of the soil bag, and r is the radius of the soil bag.

[0040] The formula for calculating the constraint tension T of the soil bag on the soil is as follows:

[0041] T = 2πE b ·(r-r0)=E b ·2π·Δr;

[0042] Among them, E b Let r be the elastic modulus of the soil bag, r0 be the initial radius of the soil bag, and Δr be the change in radius of the soil bag.

[0043] S2. Derive the theoretical relationship between the soil and the soil bag, use the UH model to describe the stress-strain calculation relationship of the soil, and analyze the influence of the radius and height of the soil bag on the bearing capacity and deformation of the soil bag.

[0044] like Figure 3As shown, the UH model is used to describe the deformation characteristics of soil. The deformation compatibility relationship of the soil bag theory model is substituted into the incremental form of the UH model to obtain the stress-strain calculation relationship of the UH model. Based on the stress-strain calculation relationship, the soil bag theory is derived by changing the size of the parameters radius r and height H, and the influence of size effect on the strength and deformation of the soil bag is analyzed.

[0045] S3. Through finite element simulation, the influence of size on the mechanical properties of a single soil bag is studied;

[0046] like Figure 4-5 As shown, based on the actual dimensions of the soil bags, five sets of three-dimensional calculation models were established using ABAQUS finite element software. Their radii and heights are: 0.5m×0.5m, 0.75m×0.5m, 1m×0.5m, 0.5m×0.75m, and 0.5m×1m, respectively. The modulus of the soil bags is 5.35 GPa, Poisson's ratio is 0.3, thickness is 0.01m, and weight is 100g / m³. 2 In the finite element calculations using the ABAQUS finite element software, the soil material is calculated using the VMAT subroutine of the UH model. The UH model has been embedded in the numerical calculation software and used to analyze geotechnical engineering problems, providing a foundation for the finite element calculations of the soil bags in this study. Before calculation, confining pressure is applied to the three-dimensional calculation model to analyze the influence of size effects on the strength and deformation of a single soil bag. Size-related functions are established to obtain the equivalent size parameters.

[0047] S4. Construct a foundation reinforcement structure, study the effect and extent of soil bag treatment on the foundation under the combination form, and find the optimal size that takes into account both mechanical performance and economic benefits.

[0048] like Figure 6 As shown, based on the actual soil bag structure of the project, a solid calculation model of multiple soil bags is combined in an alternating arrangement. Using the equivalent parameters related to the size of the individual soil bags obtained in step S3, a foundation reinforcement structure is constructed. By analyzing the effect and degree of soil bag treatment on the foundation under the combined form, the optimal size that balances mechanical performance and economic benefits is found. This provides a practical basis for the improvement of foundation reinforcement technology, which can improve the bearing capacity of the foundation and reduce deformation, and has the advantages of being economical, environmentally friendly, energy-saving and material-reducing.

[0049] Therefore, the present invention proposes a research method for the size effect of soil bag components for foundation reinforcement. For the first time, the study on the "size effect" of soil bags on their bearing capacity and deformation has been carried out, solving the practical design problem of soil bags in foundation reinforcement. By calculating and fitting the equivalent parameters related to the size of the soil bag, the optimal size that takes into account both mechanical performance and economic benefits has been found, making the theory of the physical mechanism related to soil bags more complete, and achieving better economic benefits in actual engineering.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for studying the size effect of foundation reinforcement bag-type components, characterized in that, The specific steps are as follows: S1. Based on the mechanical principles of soil bag foundation reinforcement, establish a theoretical model of soil bags; S2. Derive the theoretical relationship between the soil and the soil bag, use the UH model to describe the stress-strain calculation relationship of the soil, and analyze the influence of the radius and height of the soil bag on the bearing capacity and deformation of the soil bag. S3. The influence of size on the mechanical properties of a single soil bag is studied through finite element simulation. S4. Construct a foundation reinforcement structure, study the effect and extent of soil bag treatment on the size of the structure under the combination form, and find the optimal size that takes into account both mechanical performance and economic benefits. In S2, the UH model is used to describe the deformation characteristics of the soil. The deformation compatibility relationship of the soil bag theoretical model is substituted into the incremental form of the UH model to obtain the stress-strain calculation relationship of the UH model. Based on the stress-strain calculation relationship, the soil bag theory is derived by changing the size of the soil bag radius r and the soil bag height H, and the influence of the size effect on the soil bag strength and deformation is analyzed. In S3, using ABAQUS finite element software, five sets of three-dimensional calculation model dimensions were established, confining pressure was applied to the three-dimensional calculation model, the influence of size effect on the strength and deformation of a single soil bag was analyzed, size-related functions were established, and size equivalent parameters were obtained. In S4, based on the actual soil bag structure of the project, a solid calculation model of multiple soil bags is combined in an alternating arrangement. The equivalent parameters related to the size of the individual soil bags obtained in S3 are used to construct the foundation reinforcement structure. By analyzing the effect and degree of soil bag treatment on the foundation under the combined form, the optimal size that takes into account both mechanical performance and economic benefits is found.

2. The method for studying the size effect of foundation reinforcement bag-type components according to claim 1, characterized in that, In S1, assuming the soil bag is cylindrical and the soil is constrained by the soil bag, the formula for calculating the lateral stress generated by the soil under constraint, based on the mechanical principle of soil bag foundation reinforcement, is as follows: Where, σ r denoted as lateral stress, T is the constraint tension of the soil bag on the soil, H is the height of the soil bag, and r is the radius of the soil bag.

3. The method for studying the size effect of foundation reinforcement bag-type components according to claim 2, characterized in that, The formula for calculating the constraint tension T of the soil bag on the soil is as follows: T=2πE b ·(r-r0)=E b ·2π·Δr; Among them, E b Let r be the elastic modulus of the soil bag, r0 be the initial radius of the soil bag, and Δr be the change in radius of the soil bag.

4. The method for studying the size effect of foundation reinforcement bag-type components according to claim 1, characterized in that, In S3, based on the actual dimensions of the soil bags, five sets of three-dimensional calculation models were established using ABAQUS finite element software. Their radii and heights were: 0.5m×0.5m, 0.75m×0.5m, 1m×0.5m, 0.5m×0.75m, and 0.5m×1m, respectively. The modulus of the soil bags was 5.35 GPa, Poisson's ratio was 0.3, thickness was 0.01m, and weight was 100 g / m³. 2 Before calculation, confining pressure is applied to the three-dimensional calculation model, the influence of size effect on the strength and deformation of a single soil bag is analyzed, a size-related function is established, and the size equivalent parameters are obtained.

5. The method for studying the size effect of foundation reinforcement bag-type components according to claim 4, characterized in that, In the finite element calculation of the ABAQUS finite element software, the soil material uses the VMAT subroutine of the UH model. The UH model has been embedded in the numerical calculation software, providing a basis for the finite element calculation of the soil bag.

Images