Ground anchor type retaining wall structure and design method thereof

Abstract

The invention relates to the field of slope design, in particular to a ground anchor type retaining wall structure and a design method thereof, the ground anchor type retaining wall structure is used for preventing a soil filling area in a slope from collapsing, the ground anchor type retaining wall structure comprises an anchoring part and a retaining structure, the anchoring part is located in the slope, and a pull rod is arranged between the retaining structure and the anchoring part; one end of the pull rod is connected with the retaining structure, and the other end of the pull rod is connected with the anchoring part; the anchoring part is embedded below the bottom face of the side slope, the anchoring part is not limited in the filling side slope, the anchoring part penetrates into a stable soil body of the side slope, the soil retaining structure is arranged in the side slope, and the anchoring part is arranged in the side slope in an inclined mode, and the end, connected with the soil retaining structure, of the pulling rod is higher than the end, connected with the anchoring part, of the pulling rod. Therefore, the shear strength and the friction force of the stable soil body are fully utilized to provide larger counter force.

Description

Technical Field

[0001] The invention relates to the technical field of slope design, in particular to a ground anchor type retaining wall structure and a design method thereof. Background Art

[0002] In slope engineering, the stability of fill slope is a key issue in engineering design and construction. Fill slope is vulnerable to geological disasters such as landslide and collapse due to the looseness of fill materials, especially when encountering external forces such as gravity, rain or earthquake. In order to ensure the stability of the slope, ground anchor retaining wall structure is widely used in slope support.

[0003] The core principle of the ground-anchor retaining wall structure is to use the anchor plate buried below the fracture surface of the slope, generate reaction force through anchoring, and transmit the reaction force to the baffle with the help of the tie rod, providing tension for the baffle to resist the soil pressure, thereby enhancing the overall stability of the slope. Among them, the reaction force of the anchor plate mainly comes from the push on the soil below the fracture surface, forming a shear force between the soil to provide support. In order to ensure that the anchor plate can generate sufficient reaction force, the anchor plate must be buried to a certain depth below the fracture surface. The traditional tie rod burial depth should be 3 times the height of the anchor plate. Although this design requirement helps to improve the safety of the support structure, it also brings a series of problems and limitations. The burial depth requirement of 3 times the height of the anchor plate puts forward high requirements on the actual construction conditions, limiting the application of the structure in certain scenarios. Especially in fill slopes, due to the low shear strength of the fill material, the reaction force that the anchor plate can provide is limited, which affects the overall support effect. Secondly, as the slope height increases, the horizontal distance between the fracture surface of the slope and the retaining plate column also increases. In order to connect the anchor plate and the retaining plate, the length of the tie rod needs to be increased, but an overly long tie rod is prone to large elastic deformation during operation. Summary of the invention

[0004] The purpose of the present invention is to provide a ground-anchor retaining wall structure and a design method thereof in view of the problem that the traditional anchoring method in the prior art mostly buries the anchor in the fill slope, so that the reaction force provided by the anchor is limited; and in the traditional anchoring method, the length of the tie rod is proportional to the height of the slope. When the slope is higher, the length of the tie rod is also higher, which easily causes elastic deformation of the tie rod, thereby failing to ensure the stability of the slope.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A ground-anchor retaining wall structure is used to prevent collapse of a fill area in a slope, comprising an anchor and a retaining structure, wherein the anchor is located in the slope, a tie rod is provided between the retaining structure and the anchor, one end of the tie rod is connected to the retaining structure, and the other end is connected to the anchor; the tie rod is arranged obliquely in the slope, and the end of the tie rod connected to the retaining structure is higher than the end of the tie rod connected to the anchor.

[0007] The present invention is a ground anchor retaining wall structure. The present invention buries the anchor below the bottom surface of the slope, rather than being limited to the fill slope, so that the anchor goes deep into the bearing layer below the slope, thereby making full use of the shear strength and friction of the stable soil to provide a greater reaction force. This design effectively avoids the problem of limited reaction force provided by the anchor due to the looseness of the fill slope soil; in the present invention, the tie rod is arranged obliquely in the slope, one end is connected to the retaining structure toward the top of the slope, and the other end is connected to the anchor toward the bottom of the slope. By optimizing the arrangement direction of the tie rod, the length of the tie rod is reduced, avoiding the situation where the traditional tie rod burial depth is 3 times the height of the anchor plate. As the height of the slope increases, the horizontal distance between the rupture surface of the slope and the retaining plate column also increases. In order to connect the anchor plate and the retaining plate, the length of the tie rod needs to be increased accordingly, and an overly long tie rod is prone to large elastic deformation during operation. The present application reduces the elastic deformation caused by the excessive length of the tie rod. At the same time, the inclined arrangement also makes the force direction of the pull rod more closely aligned with the thrust direction of the slope, thus improving the force efficiency and structural stability.

[0008] As a preferred embodiment of the present invention, the anchor comprises anchor bars, the anchor bars include at least two anchor bars, and the anchor bars are vertically inserted into the bottom surface of the slope; the anchor comprises an anchor plate, the bottom of the anchor plate contacts the bottom surface of the slope, and the anchor plate is connected to the anchor bars.

[0009] The anchoring force of the entire anchor is strengthened by anchor bars, thereby improving the stability of the slope.

[0010] As a preferred solution of the present invention, the anchor plate includes a bottom plate, and the bottom plate is connected to the anchor bar; the anchor plate also includes a vertical plate, and the vertical plate and the bottom plate are arranged perpendicular to each other.

[0011] By designing the combination of the bottom plate and the vertical plate, the anchor plate can be more effectively connected to the slope soil, forming a stronger anchoring force. The connection between the bottom plate and the anchor bar ensures the stability of the anchor in the slope. The vertical plate is set vertically to the bottom plate, which can effectively increase the contact area between the anchor and the soil, improve the transmission efficiency of the anchoring force and the reaction force, and thus enhance the stability of the overall structure.

[0012] As a preferred solution of the present invention, the anchor plate includes a reinforcing plate, which is arranged at the angle between the vertical plate and the bottom plate, and one side of the reinforcing plate is connected to the vertical plate, and the other side is connected to the bottom plate.

[0013] By setting the reinforcement plate at the angle between the vertical plate and the bottom plate, the bending resistance of the anchor plate under stress can be significantly improved. The reinforcement plate effectively increases the rigidity of the structure, preventing the anchor plate from bending or deforming when subjected to large external forces, thereby improving the overall bearing capacity and resistance distribution capacity of the anchor plate.

[0014] As a preferred solution of the present invention, the retaining structure comprises a retaining plate, one side of the retaining plate faces the filling area, and a side of the retaining plate away from the filling area is provided with a column.

[0015] With one side of the retaining plate in direct contact with the slope, it can effectively resist the horizontal thrust from the fill slope, thereby playing a supporting and isolating role. Through close contact with the slope, the retaining plate can provide more stable support under different load conditions to prevent the slope from sliding or collapsing.

[0016] As a preferred solution of the present invention, the retaining structure is partially located in the soil at the bottom of the slope.

[0017] By partially burying the retaining structure in the soil at the bottom of the slope, it helps to improve the anti-slip and anti-overturning capabilities of the retaining structure. By embedding part of the retaining structure in the soil, the resistance and friction of the soil can be effectively utilized to provide greater stability for the overall structure and prevent the structure from becoming unstable due to external loads or changes in soil pressure.

[0018] As a preferred solution of the present invention, the anchor plate is a structural member made of alloy structural steel.

[0019] The service life of the anchor can be increased by providing the anchor plate as a structural member made of alloy structural steel.

[0020] The pull rod is a material that is easy to purchase in daily life, which facilitates subsequent maintenance and replacement.

[0021] As a preferred solution of the present invention, the main body of the pull rod is a structural member made of alloy structural steel.

[0022] By making the tie rod of alloy structural steel, the service life of the entire tie rod can be extended.

[0023] In a second aspect, a design method of a retaining wall structure is used to design the above-mentioned ground-anchored retaining wall structure, comprising:

[0024] Obtain the vertical force on the anchor;

[0025] According to the force balance of the anchor, a first mathematical model is constructed through the anchor resistance and the vertical force received by the anchor;

[0026] Based on the first mathematical model, the anchor resistance is calculated;

[0027] According to the anchor resistance and through the anchor force balance, a second mathematical model is constructed;

[0028] According to the second mathematical model, the tension of the pull rod is calculated;

[0029] The arrangement spacing of anchor bars is obtained based on the tension of the tie rod.

[0030] The present invention is a design method for a retaining wall structure, which ensures the balance of mechanical properties between the tie rod and the anchor. By checking the mechanical properties of the anchor, the failure of the structure due to uneven force or overload is avoided. If the design is unbalanced, the design parameters (such as the length of the tie rod or the buried depth of the anchor) can be adjusted and re-optimized to ensure the final mechanical balance. By checking the mechanical properties in detail, the long-term stability and reliability of the retaining wall structure are ensured.

[0031] As a preferred embodiment of the present invention, the first mathematical model includes:

[0032] F3 = F2 * tanθ;

[0033] Where: F3 is the vertical force on the anchor; F2 is the anchor resistance; θ is the angle between the base plate and the tie rod.

[0034] As a preferred embodiment of the present invention, the second mathematical model comprises:

[0035] F1=F2 / cosθ;

[0036] Where: F1 is the tension of the tie rod; F2 is the resistance of the anchor; θ is the angle between the base plate and the tie rod.

[0037] As a preferred solution of the present invention, the anchor resistance includes the vertical plate resistance, which is calculated as follows:

[0038] [P'] = 0.01β·K b ·K h ·E s ;

[0039]

[0040] Where: [P'] is the allowable pull-out force per unit area of ​​the anchor; K b is the unmeasured steel coefficient; b is the short side length of the rectangular anchor expressed in m; K his a coefficient related to the anchor depth ratio; H2 is the distance between the tie rod and the bottom of the retaining structure; h is the height of the anchor; E s is the compression modulus of fill test; β is the reduction coefficient related to the buried position of the anchor.

[0041] As a preferred solution of the present invention, the reduction coefficient related to the anchor embedding position is calculated as follows:

[0042] When l>H1×cotα+(a+b);

[0043] hour;

[0044] β is equal to 1.0;

[0045] or,

[0046]

[0047] Wherein: l is the length of the tie rod; H1 is the distance between the tie rod and the surface of the slope fill; α is the length of the anchor.

[0048] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0049] 1. The present invention is a ground-anchor retaining wall structure. The present invention buries the anchor below the bottom surface of the slope, rather than being limited to the fill slope, so that the anchor goes deep into the stable soil of the slope, thereby making full use of the shear strength and friction of the stable soil to provide a greater reaction force. This design effectively avoids the problem of limited reaction force provided by the anchor due to the looseness of the fill slope soil. In the present invention, the pull rod is tilted in the slope, with one end connected to the retaining structure toward the top of the slope, and the other end connected to the anchor toward the bottom of the slope. By optimizing the arrangement direction of the pull rod, the length of the pull rod is reduced, and the elastic deformation caused by the excessive length of the pull rod is reduced. At the same time, the inclined arrangement also makes the force direction of the pull rod more closely fit the thrust direction of the slope, thereby improving the force efficiency and structural stability.

[0050] 2. The present invention is a design method for a retaining wall structure, which ensures the balance of mechanical properties between the tie rod and the anchor. By checking the tension of the tie rod and the pull-out and shear resistance of the anchor, the failure of the structure due to uneven force or overload is avoided. If the design is unbalanced, the design parameters (such as the length of the tie rod or the buried depth of the anchor) can be adjusted and re-optimized to ensure the final mechanical balance. The long-term stability and reliability of the retaining wall structure are ensured by detailed verification of the mechanical properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 is a schematic diagram of a retaining wall structure of the present invention;

[0052] Figure 2 It is a force diagram of the retaining wall structure of the present invention;

[0053] Figure 3 is a schematic diagram of the side view structure of the anchor member of the present invention;

[0054] Figure 4 is a schematic side structural view of the anchor plate of the present invention;

[0055] Figure 5 is a front view structural schematic diagram of the anchor plate of the present invention;

[0056] Figure 6 is a schematic diagram of the top view of the anchor plate of the present invention;

[0057] Figure 7 It is a flow chart of the design method of the present invention.

[0058] Icons: 1-anchor; 11-anchor bar; 111-anchor rod; 12-anchor plate; 121-base plate; 1211-anchor hole; 122-vertical plate; 123-reinforcement plate; 2-retaining structure; 21-retaining board; 22-column; 3-pull rod. DETAILED DESCRIPTION

[0059] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0060] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "upper", "lower", "left", "right", "center", "inside", "outside", etc. are based on the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments to facilitate the technicians to quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation of the present invention.

[0061] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0062] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0063] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0064] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0065] Example 1

[0066] like Figures 1 to 3 A ground anchor retaining wall structure is shown, which is used to fix a slope and includes an anchor 1, which is located in the fill area of ​​the slope. The anchor 1 includes an anchor bar 11 and an anchor plate 12. The anchor bar 11 is located in the soil below the bottom surface of the slope. An anchor rod 111 is provided on the top of the anchor bar 11. The anchor plate 12 includes a bottom plate 121, which is provided with an anchor hole 1211. The anchor bar 11 and the bottom plate 121 can be anchored and connected through the anchor hole 1211 and the anchor rod 111.

[0067] Furthermore, the slope is provided with a retaining structure 2 along its extension direction. The retaining structure 2 includes a retaining plate 21. One side of the retaining plate 21 is in contact with the fill in the slope, and the other side is provided with a column 22. Through one side of the retaining plate 21 in direct contact with the fill in the slope, the horizontal thrust from the fill slope can be effectively resisted, thereby playing a supporting and isolating role. Through close contact with the slope, the retaining plate 21 can provide more stable support under different load conditions to prevent the slope from slipping or collapsing. The provision of the column 22 can play a role in transmitting force between the retaining plate 21 and the pull rod 3.

[0068] Furthermore, the retaining structure 2 and the anchor 1 are connected by a tie rod 3, and the tie rod 3 is arranged obliquely in the slope, with one end of the tie rod 3 facing the top surface of the slope and the other end facing the bottom surface of the slope. The end of the tie rod 3 facing the top surface of the slope is connected to the retaining structure 2, and the end of the tie rod 3 facing the bottom surface of the slope is connected to the anchor 1. By optimizing the arrangement direction of the tie rod 3, the length of the tie rod 3 is reduced, and the elastic deformation caused by the excessive length of the tie rod 3 is reduced. In addition, by setting the tie rod 3, the force between the tie rod 3 and the anchoring end of the anchor 1 and the column 22 can be effectively transmitted, thereby effectively maintaining the balance of force.

[0069] In one or more embodiments, at least two anchor bars 11 are provided, and the anchoring force of the entire anchor member 1 is strengthened by the anchor bars 11, thereby improving the stability of the slope. Figure 1 and Figure 3 shown.

[0070] In one or more embodiments, the anchor plate 12 also includes a vertical plate 122 connected to the bottom plate 121. The angle between the bottom plate 121 and the vertical plate 122 after connection is 90°. By designing the combination of the bottom plate 121 and the vertical plate 122, the anchor plate 12 can be more effectively connected to the slope soil to form a stronger anchoring force; the vertical plate 122 is vertically arranged with the bottom plate 121, which can effectively increase the contact area between the anchor 1 and the soil, improve the transmission efficiency of the anchoring force and the reaction force, and thus enhance the stability of the overall structure. The anchor plate 12 is arranged as an L-shaped plate formed by connecting the vertical plate 122 with the bottom plate 121, which can effectively utilize the shear resistance of the fill itself to provide the horizontal anchoring force, and at the same time, it can also utilize the gravity of the fill itself and the coordination of the anchor bar 11 to form the vertical anchoring force;

[0071] Furthermore, a reinforcing plate 123 is provided at the angle between the bottom plate 121 and the vertical plate 122. One end of the reinforcing plate 123 is connected to the bottom plate 121 and the other end is connected to the vertical plate 122. By providing the reinforcing plate 123 at the angle between the vertical plate 122 and the bottom plate 121, the bending resistance of the anchor plate 12 when subjected to force can be significantly improved. The reinforcing plate 123 effectively increases the rigidity of the structure, preventing the anchor plate 12 from bending or deforming when subjected to a large external force, thereby improving the overall bearing capacity and resistance distribution capacity of the anchor plate 12. Figures 4 to 6 shown.

[0072] Example 2

[0073] like Figure 7 The design method of a retaining wall structure shown is used to design a ground-anchored retaining wall structure described in Example 1, comprising:

[0074] Calculate the vertical force on anchor 1 according to the specification;

[0075] According to the force balance of the anchor 1, a first mathematical model is constructed through the resistance of the anchor 1 and the vertical force applied to the anchor 1;

[0076] According to the first mathematical model, the resistance of anchor 1 is calculated;

[0077] According to the resistance of the anchor 1, a second mathematical model is constructed through the force balance of the anchor 1;

[0078] According to the second mathematical model, the pulling force of the pull rod 3 is calculated;

[0079] The arrangement spacing of the anchor bars 11 is obtained according to the tension of the tie rod 3 .

[0080] In one or more embodiments, the vertical force applied to the anchor 1 includes the gravity of the fill above the anchor plate 12 and the anchoring force of the anchor bar 11 .

[0081] In one or more embodiments, the resistance of the anchor 1 includes the friction between the vertical plate 122 and the bottom plate 121 .

[0082] In one or several embodiments, the tension of the tie rod 3 includes the tension of the tie rod 3 generated by the earth pressure of the retaining structure 2 .

[0083] In one or more embodiments, the first mathematical model comprises:

[0084] F3 = F2 * tanθ;

[0085] Where: F3 is the vertical force on the anchor; F2 is the anchor resistance; θ is the angle between the base plate and the tie rod.

[0086] In one or more embodiments, the second mathematical model comprises:

[0087] F1=F2 / cosθ;

[0088] Where: F1 is the tension of the tie rod; F2 is the resistance of the anchor; θ is the angle between the base plate and the tie rod.

[0089] In one or more embodiments, the anchor 1 resistance includes the resistance of the riser 122, which is calculated as follows:

[0090] [P'] = 0.01β·K b ·K h ·E s ;

[0091]

[0092] Where: [P'] is the allowable pull-out force per unit area of ​​the anchor; K b is the unmeasured steel coefficient; b is the short side length of the rectangular anchor expressed in m; K h is a coefficient related to the anchor depth ratio; H2 is the distance between the tie rod and the bottom of the retaining structure; h is the height of the anchor; E s is the compression modulus of fill test; β is the reduction coefficient related to the buried position of the anchor;

[0093] Furthermore, the reduction factor related to the anchor embedding position is calculated as follows:

[0094] When l>H1×cotα+(a+b);

[0095] hour;

[0096] β is equal to 1.0;

[0097] or,

[0098]

[0099] Where: l is the length of the tie rod; H1 is the distance between the tie rod and the upper surface of the fill slope; α is the length of the anchor.

[0100] In one or several embodiments, the length α of the anchor is calculated as follows:

[0101]

[0102] Wherein: H1 is the distance between the tie rod and the surface of the slope fill; h is the height of the anchor.

[0103] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A ground-anchor retaining wall structure for preventing collapse of the fill area in the slope, characterized in that: The invention comprises an anchor (1) and a retaining structure (2), wherein the anchor (1) is located in a slope, a tie rod (3) is provided between the retaining structure (2) and the anchor (1), one end of the tie rod (3) is connected to the retaining structure (2), and the other end is connected to the anchor (1); the tie rod (3) is arranged obliquely in the slope, and the end of the tie rod (3) connected to the retaining structure (2) is higher than the end of the tie rod connected to the anchor (3).

2. A ground-anchor retaining wall structure according to claim 1, characterized in that: The anchor (1) comprises anchor bars (11), the anchor bars (11) comprise at least two anchor bars (11), and the anchor bars (11) are vertically inserted into the bottom surface of the slope; the anchor (1) further comprises an anchor plate (12), the bottom of the anchor plate (12) is in contact with the bottom surface of the slope, and the anchor plate (12) is connected to the anchor bars (11).

3. A ground-anchor retaining wall structure according to claim 2, characterized in that: The anchor plate (12) comprises a bottom plate (121), wherein the bottom plate (121) is connected to the anchor bar (11); the anchor plate (12) further comprises a vertical plate (122), wherein the vertical plate (122) and the bottom plate (121) are arranged perpendicular to each other.

4. The ground-anchor retaining wall structure according to claim 3, characterized in that: The anchor plate (12) comprises a reinforcing plate (123), wherein the reinforcing plate (123) is arranged at the angle between the vertical plate (122) and the bottom plate (121), and one side of the reinforcing plate (123) is connected to the vertical plate (122) and the other side is connected to the bottom plate (121).

5. A ground-anchored retaining wall structure according to any one of claims 1 to 4, characterized in that: The retaining structure (2) comprises a retaining plate (21), one side of the retaining plate (21) faces the filling area, and a side of the retaining plate (21) away from the filling area is provided with a column (22).

6. The ground-anchor retaining wall structure according to claim 5, characterized in that: The pull rod (3) is a structural component made of alloy structural steel.

7. A design method for a retaining wall structure, characterized in that: A ground-anchor retaining wall structure for designing any one of claims 1 to 6, comprising: Obtaining the vertical force exerted on the anchor (1); According to the force balance of the anchor (1), a first mathematical model is constructed through the resistance of the anchor (1) and the vertical force applied to the anchor (1); According to the first mathematical model, the resistance of the anchor (1) is calculated; According to the resistance of the anchor (1), a second mathematical model is constructed through the force balance of the anchor (1); According to the second mathematical model, the pulling force of the pull rod (3) is calculated; The arrangement spacing of the anchor bars (11) is obtained according to the tension of the pull rod (3).

8. The design method of a retaining wall structure according to claim 7, characterized in that: The first mathematical model comprises: F3 = F2 * tanθ; Where: F3 is the vertical force on the anchor; F2 is the anchor resistance; θ is the angle between the base plate and the tie rod.

9. The design method of a retaining wall structure according to claim 7, characterized in that: The second mathematical model comprises: F1=F2 / cosθ; Where: F1 is the tension of the tie rod; F2 is the resistance of the anchor; θ is the angle between the base plate and the tie rod.

10. The design method of a retaining wall structure according to claim 7, characterized in that: The resistance of the anchor (1) includes the resistance of the vertical plate (122), which is calculated as follows: [P']=0.01β K b ·K h ·E s ; Where: [P'] is the allowable pull-out force per unit area of ​​the anchor; K b is the unmeasured steel coefficient; b is the short side length of the rectangular anchor expressed in m; K h is a coefficient related to the anchor depth ratio; H2 is the distance between the tie rod and the bottom of the retaining structure; h is the height of the anchor; E s is the compression modulus of fill test; β is the reduction coefficient related to the buried position of the anchor.

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