Arch foot pull beam assembly and self-balancing prestress control method

Abstract

The application relates to the technical field of building engineering and discloses an arch foot pull beam assembly and a self-balancing prestress control method, which comprises a first supporting assembly provided with a first connecting part, a second supporting assembly provided with a second connecting part, and a jacking assembly connected between the first supporting assembly and the second supporting assembly, wherein the first connecting part is slidably penetrated through the second supporting assembly, and the second connecting part is slidably penetrated through the first supporting assembly. The arch foot pull beam assembly can convert the pulling force of the pull beam into the pressure borne by the jacking assembly. When the pull beam is gradually elongated due to stress deformation, the jacking assembly is used for jacking, the distance between the two arch feet can be kept unchanged, the elongation deformation problem of the pull beam is solved, the horizontal deformation of the arch feet under the action of the structure self weight and additional constant load is basically zero, the technology can solve the problem of excessive deformation of the pull beam, and compared with the scheme of adopting a box foundation or an underground continuous wall to resist the thrust of the arch feet, the construction period and the engineering cost are greatly saved.

Description

Technical Field

[0001] This application relates to the field of building engineering technology, and in particular to an arch foot tie beam assembly and a self-balancing prestress control method. Background Technology

[0002] In the field of architectural engineering, the physical characteristics of super-large span arch dome structures or bridge structures can lead to enormous lateral thrust at the arch foot. Without intervention, this can cause deformation or even collapse. Current solutions typically involve fixing the arch foot with tie beams or cables, tensioning both ends of the tie beams or cables to apply lateral prestress to the arch foot, thereby preventing deformation or collapse of the super-large span arch dome structure or bridge structure.

[0003] However, when the distance between arch abutments is too great, resulting in excessively long tie beams, the limited stiffness of these beams makes them prone to significant elongation deformation under immense lateral thrust. Current solutions involve increasing the cross-sectional area of ​​the tie beams to enhance their structural stiffness; however, this is prohibitively expensive due to material costs or space constraints when the arch span is large. Alternatively, box foundations or diaphragm walls can be installed at the arch abutments to resist horizontal thrust, but these methods increase construction time and costs. Solving the tie beam deformation problem would prevent horizontal displacement of the arch abutments in ultra-large span arch domes or bridge arch structures under their own weight and additional loads, significantly reducing construction time and costs. Currently, there is a lack of arch abutment tie beam components and self-balancing prestressing control methods on the market. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the arch foot tie beam assembly of this invention can convert the tension of the tie beam into the pressure of the lifting assembly. When the tie beam undergoes deformation due to stress and gradually elongates, the lifting assembly can lift it, keeping the distance between the two arch feet constant. This solves the problem of tie beam elongation and deformation, and makes the horizontal deformation of the arch feet under the structural weight and additional constant load essentially zero. By adopting this technology, the problem of excessive tie beam deformation can be solved. Compared with the solution of using box foundations or underground continuous walls to resist the thrust of the arch feet, it greatly saves construction time and project cost.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: an arch foot tie beam assembly for connecting two tie beams, the two tie beams being respectively connected to the arch feet at both ends, the arch foot tie beam assembly comprising: a first support assembly, the first support assembly being provided with a first connecting part;

[0006] A second support component, wherein a second connecting portion is provided on the second support component;

[0007] A lifting assembly, which is connected between the first support assembly and the second support assembly;

[0008] The first connecting part and the second connecting part are arranged parallel to each other. The first connecting part slides through the second support component and is connected to one of the tie beams.

[0009] The second connecting part slides through the first support assembly and is connected to another of the tie beams. The first support assembly and the second support assembly move in opposite directions by the drive of the lifting assembly.

[0010] Furthermore, the first connecting portion includes a plurality of connecting plates arranged around the second connecting portion, and each connecting plate is arranged parallel to the second connecting portion. Each connecting plate slides through the second support assembly, and the end of each connecting plate away from the first support assembly is connected to one of the tie beams.

[0011] Furthermore, the lifting assembly includes a synchronous jack, which includes a plurality of jack components arranged around the second connecting portion, each of the jack components being arranged parallel to the second connecting portion.

[0012] Furthermore, the arch foot tie beam assembly also includes: a first pressure-bearing ring, which is sleeved on each of the connecting plates and connected to the first support assembly;

[0013] The second pressure-bearing ring is slidably sleeved on each of the connecting plates, and the second pressure-bearing ring is connected to the second support assembly;

[0014] A padding area is formed between the first pressure ring and the second pressure ring, and the padding area is used to insert padding material.

[0015] Furthermore, a positioning plate is provided on the outer surface of one of the first pressure rings or the second pressure ring, and the positioning plate is slidably connected to the other of the second pressure rings or the first pressure ring, and the first pressure ring, the second pressure ring and the positioning plate form the pad material area.

[0016] Furthermore, both the first and second pressure-bearing rings are rectangular in shape, and four positioning plates are provided, with the four positioning plates respectively located on the four sides of the first pressure-bearing ring and the four sides of the second pressure-bearing ring.

[0017] Furthermore, both the first support component and the second support component are frustum-shaped, and the bottom surfaces of the first support component and the second support component are positioned opposite each other.

[0018] Furthermore, the lifting assembly is equipped with a pressure sensor, which is used to detect the real-time lateral thrust of the two arch feet.

[0019] Furthermore, a self-balancing prestress control method for the arch foot tie beam assembly as described above is characterized by comprising the following steps:

[0020] Determine whether the arch foot has deformed. If so, perform the following steps; otherwise, shut down the lifting assembly.

[0021] The lifting component controls the first support component and the second support component to move in opposite directions, thereby creating a gap between the first support component and the second support component;

[0022] Insert padding material into the gap to maintain the distance between the first support assembly and the second support assembly, and then perform the step of "determining whether the arch foot has deformed; if so, perform the following steps; otherwise, close the lifting assembly".

[0023] Furthermore, step S1 includes the following steps:

[0024] Calculate the prestress required for the arch foot tie beam;

[0025] The magnitude of the real-time lateral thrust of the two arch feet and the prestress is determined. When the real-time lateral thrust of the two arch feet is less than the prestress, the arch feet deform; when the real-time lateral thrust of the two arch feet is equal to the prestress, the arch feet do not deform.

[0026] Beneficial effects: The arch foot tie beam assembly of the present invention can convert the tension of the tie beam into the pressure of the lifting assembly. When the tie beam gradually elongates due to stress deformation, the lifting assembly can lift it, keeping the distance between the two arch feet constant. This solves the problem of tie beam elongation and deformation, and makes the horizontal deformation of the arch feet under the structural self-weight and additional constant load essentially zero. Using this technology can solve the problem of excessive tie beam deformation. Compared with the solution of using box foundations or underground continuous walls to resist the thrust of the arch feet, it greatly saves construction time and project cost. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the arch foot tie beam assembly provided by the present invention (when the lifting assembly, the first bearing ring, the second bearing ring, and the positioning plate are in perspective).

[0028] Figure 2 A schematic diagram of the structure of the first support component provided by the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the second support component provided by the present invention;

[0030] Figure 4 This is a schematic diagram of the arch foot tie beam assembly provided by the present invention (when the lifting assembly is in perspective).

[0031] Figure 5 For the present invention Figure 4 A partially enlarged structural diagram;

[0032] Figure 6 This is a structural schematic diagram of the arch foot tie beam assembly provided by the present invention;

[0033] Figure 7 A cross-sectional schematic diagram of the mounting pad material provided by the present invention;

[0034] The labels in the attached diagram are as follows: 1. First support assembly; 11. First connecting part; 111. Connecting plate; 2. Second support assembly; 21. Second connecting part; 3. Lifting assembly; 31. Jack assembly; 4. First pressure bearing ring; 41. Pad material area; 411. Upper strip pad material; 412. Lower strip pad material; 413. Left strip pad material; 414. Right strip pad material; 5. Second pressure bearing ring; 6. Positioning plate; 7. Tie beam. Detailed Implementation

[0035] This invention provides an arch foot tie beam assembly and a self-balancing prestress control method. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0036] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0037] It should also be noted that the same or similar reference numerals in the accompanying drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] The invention will be further explained below with reference to the accompanying drawings and the description of the embodiments.

[0040] This embodiment provides an arch foot tie beam assembly and a self-balancing prestress control method, such as Figures 1 to 7 As shown, in order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: an arch foot tie beam 7 assembly, used to connect two tie beams 7 respectively connected to two arch feet. It is understandable that domes or arches have at least two arch feet. When the volume of a dome or arch is too large, it will deform, and the two arch feet will move relative to each other, generating lateral tension. To avoid deformation of the dome or arch, tie beams 7 need to be installed on the two arch feet. That is, the two ends of the tie beams 7 are connected to the two arch feet respectively to fix the two arch feet and prevent them from moving relative to each other, thus causing deformation of the dome or arch. However, when the lateral tension generated by the two arch feet is too large, the tie beams 7 will also deform, causing the two arch feet to move relative to each other and deform the dome or arch. The key point of the present invention is that an arch foot tie beam assembly is connected between the two tie beams 7 that are respectively connected to the arch feet. The length of the total tie beam formed by the connection of the two tie beams 7 can be changed as needed to offset the effect of the tie beams 7 deforming and elongating when the lateral tension generated by the two arch feet is too large.

[0041] The arch foot tie beam 7 assembly includes: a first support assembly 1, a second support assembly 2, and a lifting assembly 3. The first support assembly 1 is provided with a first connecting part 11, and the second support assembly 2 is provided with a second connecting part 21. The first connecting part 11 and the second connecting part 21 are arranged parallel to each other. The first connecting part 11 slides through the second support assembly 2 and is connected to one of the tie beams 7. The second connecting part 21 slides through the first support assembly 1 and is connected to the other tie beam 7. Preferably, the first connecting part 11 is located in the middle of the first support assembly 1 and is perpendicular to each other, and the second connecting part 21 is located in the middle of the second support assembly 2 and is perpendicular to each other. The first support assembly 1 and the second support assembly 2 are slidably connected through the first connecting part 11 and the second connecting part 21. The first connecting part 11 and the second connecting part 21 are elongated strips, prefabricated in the factory, and the tie beam 7 is welded to the first connecting part 11 or the second connecting part 21 at the construction site. Alternatively, the first connecting part 11 and the second connecting part 21 can be weldable parts, and the tie beam 7 is directly welded to the first support component 1 or the second support component 2 at the construction site. The first option is preferred in this embodiment. The lifting component 3 is connected between the first support component 1 and the second support component 2. The lifting component 3 is used to drive the first support component 1 and the second support component 2 to move in opposite directions. When the first support component 1 and the second support component 2 move in opposite directions, the two tie beams 7 move towards each other, which can shorten the overall length of the tie beam 7 formed by connecting the two tie beams 7. After the superstructure construction is completed, the load on the construction platform is gradually reduced, and the tension on the tie beam 7 gradually increases, causing the tie beam 7 to gradually elongate. At this time, the jacking component 3 is used to lift it, which can dynamically balance the overall length of the tie beam 7 formed by the connection of the two tie beams 7, keep the distance between the two arch feet constant, and control the maximum horizontal deformation of the arch feet within 5mm, meeting the project requirements and solving the problem of tie beam 7 elongation deformation. This ensures that the horizontal deformation of the arch feet under the structural self-weight and additional constant load is basically zero, greatly saving construction time and project cost. Preferably, a pad material can be inserted between the first support component 1 and the second support component 2, and then the jacking component 3 can be closed, which can keep the overall length of the tie beam 7 formed by the connection of the two tie beams 7 basically unchanged, saving energy. Preferably, the pad material can be made of steel. After the pad material is inserted in the pad material area 41, the steel can be welded to the first support component 1 or the second support component 2, making the first support component 1 and the second support component 2 more stable.

[0042] In one embodiment, such as Figure 1 , Figure 2 , Figure 4As shown, the first connecting part 11 includes multiple connecting plates 111 arranged around the second connecting part 21, and each connecting plate 111 is arranged parallel to the second connecting part 21. Each connecting plate 111 slides through the second support component 2, and each connecting plate 111 is connected to one of the tie beams 7 at the end away from the first support component 1. Preferably, the first connecting part 11 is located in the middle of the first support component 1 and is perpendicular to each other. The connecting plates 111 are arranged around the middle of the second support component 2 and are perpendicular to each other, which enables the two tie beams 7 to be coaxially connected and the structure to be stable under stress. The lifting component 3 is a synchronous jack, which includes multiple jack components 31 arranged around the second connecting part 21. Each jack component 31 is arranged parallel to the second connecting part 21. All jack components 31 work synchronously, which can prevent the two tie beams 7 from bending and crossing each other, keep the two tie beams 7 coaxially connected, and ensure the structure to be stable under stress.

[0043] In one embodiment, such as Figure 4 , Figure 5 As shown, the arch foot tie beam 7 assembly further includes: a first bearing ring 4, which is sleeved on each connecting plate 111 and connected to the first support assembly 1; a second bearing ring 5, which is slidably sleeved on each connecting plate 111 and connected to the second support assembly 2; a pad material area 41 is formed between the first bearing ring 4 and the second bearing ring 5, which is used to insert pad material. After the lifting assembly 3 is closed, the overall length of the tie beam 7 formed by connecting the two tie beams 7 remains basically unchanged, saving energy. Preferably, the pad material can be steel. After the pad material area 41 is used to insert the pad material, the steel can be welded to the first support assembly 1 or the second support assembly 2 to make the first support assembly 1 and the second support assembly 2 more stable.

[0044] In one embodiment, such as Figure 4 , Figure 5 , Figure 6 As shown, a positioning plate 6 is provided on the outer surface of the first pressure ring 4 and the outer surface of the second pressure ring 5, and the positioning plate 6 is slidably connected to the second pressure ring 5 and the first pressure ring 4. The first pressure ring 4, the second pressure ring 5, and the positioning plate 6 form a padding area 41. After the padding material is inserted into the padding area 41, the positioning plate 6 can abut against the padding material to prevent the padding material from sliding out of the gap between the first pressure ring 4 and the second pressure ring 5, thereby enhancing safety.

[0045] In one embodiment, such as Figure 4 , Figure 5As shown, both the first pressure ring 4 and the second pressure ring 5 are rectangular in shape. Four positioning plates 6 are provided, and the four positioning plates 6 are respectively provided on the four sides of the first pressure ring 4 / the four sides of the second pressure ring 5. Preferably, the padding material area 41 includes an upper padding material area, a lower padding material area, a left padding material area, and a right padding material area, which together form a rectangular padding material area 41. First, insert the lower strip pad 412 from right to left into the lower area of ​​the pad, with the left end of the lower strip pad 412 flush with the left end of the lower area of ​​the pad. Then, insert the right strip pad 414 from top to bottom into the right area of ​​the pad, with the lower end of the right strip pad 414 abutting against the lower strip pad 412. Next, insert the upper strip pad 411 from right to left into the lower area of ​​the pad, with the right end of the upper strip pad 411 abutting against the right strip pad 414, and cut off the excess part of the left end of the upper strip pad 411 so that the left strip pad 413 can be inserted from top to bottom into the left area of ​​the pad. Finally, insert the left strip pad 413 from top to bottom into the left area of ​​the pad, with the lower end of the left strip pad 413 abutting against the lower strip pad 412, thus completing the installation of the pad. Preferably, after installation, the upper strip pad 411, lower strip pad 412, left strip pad 413 and right strip pad 414 can be welded to the first support component 1 or the second support component 2, which can make the first support component 1 and the second support component 2 more stable.

[0046] In one embodiment, such as Figure 1 - Figure 6 As shown, both the first support component 1 and the second support component 2 are frustum-shaped. The surface of the first support component 1 opposite to the second support component 2 is the first end plate surface, and the surface of the second support component 2 opposite to the first support component 1 is the second end plate surface. The fixed end and the lifting end of the lifting component 3 are respectively disposed on the first end plate surface and the second end plate surface. Preferably, rigid plates are disposed on both the first end plate surface and the second end plate surface to enhance the structural rigidity of the first support component 1 and the second support component 2. The frustum-shaped design of the first support component 1 and the second support component 2 can effectively improve the structural strength of the first support component 1 and the second support component 2, making the first support component 1 and the second support component 2 more stable.

[0047] In one embodiment, a pressure sensor (not shown in the figure) is provided on the lifting assembly 3. The pressure sensor is used to detect the real-time lateral thrust between the two arch feet. The lifting assembly 3 is connected to the first support assembly 1 or the second support assembly 2 through the pressure sensor, and the pressure between the first support assembly 1 or the second support assembly 2 can be measured, that is, the tension in the crossbeam. By reading the pressure sensor, the real-time lateral thrust between the two arch feet can be known.

[0048] A self-balancing prestress control method for the above-mentioned arch foot tie beam 7-component includes the following steps:

[0049] S1: Determine whether the arch foot has deformed. If so, proceed to the following steps; otherwise, proceed to step S4.

[0050] S2: The lifting component 3 controls the first support component 1 and the second support component 2 to move in opposite directions, creating a gap between them. Due to the elongation of the tie beam 7 under stress, the distance between the first and second support components 1 and 2 increases as they move in opposite directions. This increased distance shortens the overall length of the tie beam formed by the connection of the two tie beams 7, offsetting the elongation effect of the tie beam 7 under stress. When the distance between the two arch feet remains constant, the problem of tie beam 7 elongation deformation is solved, ensuring that the horizontal deformation of the arch feet under the structural weight and additional dead load is essentially zero, meeting engineering requirements and significantly saving construction time and project cost.

[0051] S3: Insert padding material into the gap to maintain the distance between the first support component 1 and the second support component 2, and then perform step S1. Inserting padding material into the gap to maintain the distance between the first support component 1 and the second support component 2 is preferably done with steel. After the padding material is inserted into the padding material area 41, the steel can be welded to the first support component 1 or the second support component 2 to make the first support component 1 and the second support component 2 more stable.

[0052] S4: Close the lifting assembly 3. Closing the lifting assembly 3 keeps the overall length of the tie beam 7 formed by the connection of the two tie beams 7 basically unchanged, saving energy.

[0053] A self-balancing prestress control method for the arch foot tie beam assembly as described above, step S1 includes the following steps:

[0054] S11: Calculate the prestress required for the arch foot tie beam. This prestress is the prestress that tie beam 7 needs to bear when the arch foot remains undeformed.

[0055] S12: Determine the magnitude of the real-time lateral thrust and prestress at the two arch abutments. When the real-time lateral thrust at the two arch abutments is less than the prestress, the arch abutments deform; when the real-time lateral thrust at the two arch abutments equals the prestress, the arch abutments do not deform. When the real-time lateral thrust at the two arch abutments is less than the prestress, meaning the actual prestress provided by tie beam 7 cannot meet the calculated prestress, tie beam 7 has already deformed, and the spacing between the arch abutments needs to be reduced, i.e., the overall length of tie beam 7 needs to be shortened. When the real-time lateral thrust at the two arch abutments equals the prestress, the effect of the elongation caused by the deformation of tie beam 7 under stress has been offset.

[0056] In summary, this application relates to the technical field of arch foot tie beam 7 components, and discloses an arch foot tie beam 7 component and its prestress control method, including a first support component 1 with a first connecting part 11, a second support component 2 with a second connecting part 21, and a lifting component 3 connecting the first support component 1 and the second support component 2. The first connecting part 11 slides through the second support component 2 and connects to one of the tie beams 7, and the second connecting part 21 slides through the first support component 1 and connects to the other tie beam 7. The lifting component 3 drives the first support component 1 and the second support component 2 to move in opposite directions. The arch foot tie beam 7 component of the present invention can convert the tension of the tie beam 7 into the pressure of the lifting component 3. When the tie beam 7 undergoes deformation due to stress and gradually elongates, the lifting component 3 can lift it, keeping the distance between the two arch feet constant, solving the problem of elongation deformation of the tie beam 7, and making the horizontal deformation of the arch foot under the structural self-weight and additional constant load essentially zero, greatly saving construction time and project cost.

[0057] 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 the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An arch foot tie beam assembly for connecting two collinear tie beams, the two tie beams being respectively connected to the arch feet at both ends, characterized in that, The arch foot tie beam assembly includes: a first support assembly, on which a first connecting portion is provided; The second support component is provided with a second connecting part; A lifting assembly, which is connected between the first support assembly and the second support assembly; The first connecting part includes a plurality of connecting plates arranged around the second connecting part. Each connecting plate is arranged parallel to the second connecting part, and one end of each connecting plate is connected to the first support component, and the other end slides through the second support component and is connected to one of the tie beams. The second connecting part slides through the first support assembly and is connected to another of the tie beams. The first support assembly and the second support assembly move in opposite directions by the drive of the lifting assembly.

2. The arch foot tie beam assembly according to claim 1, characterized in that, The lifting assembly includes a synchronous jack, which includes a plurality of jack components arranged around the second connecting portion, each of the jack components being arranged parallel to the second connecting portion.

3. The arch foot tie beam assembly according to claim 2, characterized in that, The arch foot tie beam assembly further includes: a first pressure-bearing ring, which is sleeved on each of the connecting plates and connected to the first support assembly; The second pressure-bearing ring is slidably sleeved on each of the connecting plates, and the second pressure-bearing ring is connected to the second support assembly; A padding area is formed between the first pressure ring and the second pressure ring, and the padding area is used to insert padding material.

4. The arch foot tie beam assembly according to claim 3, characterized in that, A positioning plate is provided on the outer surface of one of the first pressure rings or the second pressure ring, and the positioning plate is slidably connected to the other of the second pressure rings or the first pressure ring. The first pressure ring, the second pressure ring, and the positioning plate form the pad material area.

5. The arch foot tie beam assembly according to claim 4, characterized in that, The first and second pressure rings are both rectangular in shape. Four positioning plates are provided, and the four positioning plates are respectively provided on the four sides of the first pressure ring and the four sides of the second pressure ring.

6. The arch foot tie beam assembly according to claim 1, characterized in that, Both the first support component and the second support component are frustum-shaped.

7. The arch foot tie beam assembly according to claim 1, characterized in that, The lifting assembly is equipped with a pressure sensor, which is used to detect the real-time lateral thrust of the two arch feet.

8. A method for controlling the self-balancing prestress of an arch foot tie beam assembly as described in any one of claims 1-7, characterized in that, Includes the following steps: S1: Determine whether the distance between the two arch feet has occurred. If so, proceed with the following steps. Otherwise, proceed to step S4; S2: The lifting component controls the first support component and the second support component to move in opposite directions, so that a gap is formed between the first support component and the second support component; S3: Insert padding material into the gap to maintain the distance between the first support assembly and the second support assembly, and then execute step S1; S4: Close the lifting assembly.

9. A method for controlling the self-balancing prestress of an arch foot tie beam assembly as described in claim 8, characterized in that, Step S1 includes the following steps: S11: Calculate the prestress required for the arch foot tie beam; S12: Determine the magnitude of the real-time lateral thrust of the two arch feet and the prestress. When the real-time lateral thrust of the two arch feet is less than the prestress, the arch feet will deform; when the real-time lateral thrust of the two arch feet is equal to the prestress, the arch feet will not deform.

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