Tower crane foundation attached wall frame and construction method thereof

Abstract

The invention discloses a tower crane foundation attached wall frame and a construction method thereof. The frame is installed on the pier body, and then a wall-attached connecting frame and a tower crane foundation are arranged, and the horizontal force generated by the wall-attached connecting frame is transmitted to the pier body through shear keys. Each component can be processed in sections at a back field and hoisted in sections on site, which solves the difficulties in manufacturing and installing the wall-attached frame without embedded parts. At the same time, no embedded parts are required when installing the frame, which can reduce damage to the pier body and save materials. It has certain economic and social benefits, has promotion and application value, and meets the requirements of green construction.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and more specifically, to a tower crane foundation attached wall frame and a construction method thereof. Background Art

[0002] During bridge construction, the construction plan often needs to be adjusted due to design changes and changes in environmental factors. Many temporary structures do not have embedded parts prepared in advance due to the adjustment of the plan, which leads to many difficulties in the implementation of the new plan.

[0003] In the common construction of piers and main beams in water, in order to meet the lifting requirements, a tower crane is usually arranged at a suitable position near the pier. Since it is in water, the foundation of the tower crane is generally a steel foundation. The steel foundation is in water and has a high free height, which poses a great safety risk. In order to ensure that the strength, rigidity and stability of the steel foundation meet the design requirements, it is necessary to set up an attached wall and an attached wall frame for the tower crane steel foundation. Since the pier has been completed, the original construction plan does not require the embedded wall frame embedded parts on the pier. In addition, the size of the pier is large, and the processing and installation of conventional attached wall frames are difficult, the force is unclear, there are great safety hazards, and waste of materials. For a long time, the design and construction of attached wall frames without embedded parts has been a construction technology problem that needs to be solved urgently. Summary of the invention

[0004] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0005] Another object of the present invention is to provide a tower crane foundation attached wall frame and a construction method thereof, which utilizes the limb structure of the pier body for installation and fixation, without the need to set embedded parts on the pier body, thereby solving the technical problem in the prior art that conventional wall frames require embedded parts and are difficult to install.

[0006] In order to achieve these purposes and other advantages according to the present invention, a tower crane foundation attached wall frame is provided, including a frame, a pier body having limbs, the frame is arranged at the lower ends of all the limbs of the pier body, the frame includes a pair of first outer frames which are parallel to each other and horizontally arranged on the front and rear sides of all the limbs, the first outer frames extend along the width direction of the main beam and are arranged in close contact with the corresponding sides of all the limbs, a second outer frame is connected between both ends of the pair of first outer frames, and a rectangular frame structure which surrounds all the limbs inside is formed in the horizontal plane, fine-rolled threaded steel bars are respectively arranged between the pair of first outer frames on the left and right sides of each limb, shear keys are connected to the first outer frame at the top corners on the left and right sides of each limb, the tower crane foundation is arranged on one side of the pier body in the width direction of the main beam, and an attached wall is connected between the tower crane foundation and the second outer frame closest to the tower crane foundation.

[0007] Preferably, two second outer frames are spaced apart and connected between the ends of a pair of the first outer frames close to the tower crane foundation, and the attached wall is connected to the second outer frame closest to the tower crane foundation.

[0008] Preferably, a diagonal brace is symmetrically arranged along the width direction of the main beam between the two second outer frames close to the tower crane foundation, one end of the diagonal brace is connected to the top corner between one of the first outer frames and one of the second outer frames, and the other end is connected to the other second outer frame.

[0009] Preferably, the frame is provided with two adjacent layers in the vertical direction, and two second outer frames in the same vertical direction are respectively fixed with connecting plates between corresponding left and right side surfaces.

[0010] Preferably, the high-quality rolled threaded steel bars are passed between the two layers of the frames, and both ends of each high-quality rolled threaded steel bars extend out of the frames for tensioning and then are anchored by anchors, and the upper and lower ends of each anchor are respectively in contact with the corresponding upper and lower first outer frames.

[0011] Preferably, the pier body is a double-limb structure, and the sides of the two limbs that are away from each other are semicircular arc structures with opposite centers. The shear key includes a first shear key and a second shear key. The shear key located on one side of the semicircular arc structure of the limb is the first shear key. The first shear key is consistent in shape with the semicircular arc structure of the limb on the side close to the corresponding limb, and the front and rear sides are respectively fixedly connected to the first outer frame on the corresponding side. The second shear key is located between the two limbs, and a second shear key is respectively connected between each limb and a pair of the first outer frames.

[0012] Preferably, the limbs of the pier body are all hollow structures, the second shear key is arranged between the corresponding limb and the adjacent finished rolled threaded steel bar, and the shape of the second shear key in the horizontal plane is complementary to the shape of the hollow structure at the top corner near the corresponding second shear key.

[0013] The present invention also provides a construction method for a tower crane foundation attached to a wall frame, comprising the following steps:

[0014] S1, using the limb structure of the pier body, the first outer frames are respectively set on the front and rear sides of all the limbs, and the two first outer frames are respectively drawn with fine-rolled threaded steel bars on the left and right sides of all the limbs to fasten the two first outer frames to the bottom of the limbs;

[0015] S2, the second outer frame is fixedly connected between a pair of the first outer frames, and the shear keys are respectively fixedly connected at each connection between the left and right sides of each of the limbs and the pair of the first outer frames, and the shear keys are closely attached to the corresponding limbs;

[0016] S3, synchronously re-tightening all the precision-rolled threaded steel bars, padding the parts of the first outer frame, the shear key and the corresponding limbs that are not in close contact with each other, to ensure that they are in close contact with the limbs of the pier body;

[0017] S4, installing the tower crane foundation, fixing and connecting the attached wall between the second outer frame closest to the tower crane foundation and the tower crane foundation, and transmitting the horizontal force generated by the attached wall to the pier body through the shear key.

[0018] Preferably, the pier body is a double-limb structure, and the shear keys include the first shear keys located on the outside of the two limbs in the width direction of the main beam and the second shear keys located between the two limbs. The second shear keys are first welded and fixed to the first outer frame, and then the first outer frame is installed on the front and rear sides of the limbs. When operating the high-quality rolled threaded steel bars, first install and pull the two high-quality rolled threaded steel bars located between the two limbs, and then install and pull the two high-quality rolled threaded steel bars located outside the two limbs.

[0019] Preferably, when setting the first shear key and the second shear key, Midas-Civil is used to establish an overall calculation model of the tower crane foundation, attached wall and frame, and the strength, stiffness and stability of the tower crane foundation, attached wall and frame under the most unfavorable working conditions are calculated. The forces of all the first shear keys and the second shear keys are derived through Midas-Civil, and the strength of all the first shear keys and the second shear keys is verified.

[0020] The present invention includes at least the following beneficial effects: the tower crane foundation attached wall frame and the construction method thereof of the present invention, by installing the frame on the pier body, and then arranging the wall-attached connection frame and the tower crane foundation, the horizontal force generated by the wall-attached is transmitted to the pier body through the shear key, and each component can be processed in sections at the back field and hoisted in sections on site, which solves the production and installation problems of the wall-attached frame under the condition of no embedded parts. At the same time, no embedded parts are required when installing the frame, which can reduce damage to the pier body and save materials. It has certain economic and social benefits, has promotion and application value, and meets the requirements of green construction.

[0021] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic elevation diagram of connecting a tower crane foundation and a pier body through a tower crane foundation attached wall frame of the present invention;

[0023] Figure 2 It is a top plan view schematic diagram of connecting a tower crane foundation and a pier body through a tower crane foundation attached wall frame of the present invention;

[0024] Figure 3 This is a schematic elevation diagram of the framework;

[0025] Figure 4 for Figure 3 AA section view;

[0026] Figure 5 for Figure 3 BB section view;

[0027] Figure 6 It is an enlarged structural diagram of one side of the frame of the present invention close to the tower crane foundation.

[0028] Explanation of the reference numerals in the drawings in the specification: 1. frame, 2. attached wall, 3. tower crane, 4. pier body, 5. tower crane foundation, 6. pedestal, 7. first outer frame, 8. second outer frame, 9. diagonal brace, 10. first shear key, 11. second shear key, 12. high-precision rolled threaded steel bar, 13. limb, 14. hole, 15. connecting plate, 16. anchor. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0030] It should be noted that the experimental methods described in the following implementation schemes are all conventional construction methods unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0031] like Figure 1-5 As shown, the present invention provides a tower crane foundation wall frame, including a frame 1, a pier body 4 having branches 13, the frame 1 is arranged at the lower end of all the branches 13 of the pier body 4, the frame 1 includes a pair of first outer frames 7 which are parallel to each other and horizontally arranged on the front and rear sides of all the branches 13, the first outer frames 7 extend along the width direction of the main beam and are arranged in close contact with the corresponding sides of all the branches 13, a second outer frame 8 is connected between both ends of the pair of first outer frames 7, and a rectangular frame structure is formed on the horizontal plane to surround all the branches 13 inside, and a pair of first outer frames 7 are respectively provided with high-rolled threaded steel bars 12 on the left and right sides of each branch 13, the first outer frame 7 is connected with shear keys at the top corners on the left and right sides of each branch 13, and a wall attachment 2 is connected between the second outer frame 8 closest to the tower crane foundation 5 and the tower crane foundation 5.

[0032] For the convenience of description, the arrangement direction of the limbs 13 of the pier body 4 is the width direction of the main beam, which is similar to the following. Figure 1 The left and right directions shown are consistent, the direction is horizontal and perpendicular to Figure 1 The left and right directions shown are the length directions of the main beam, and the two sides of the limbs 13 located in the length direction of the main beam are the front and rear sides of the limbs 13. Figure 1 The left and right directions are the left and right directions of the limbs 13. The pier body 4 is installed on the pedestal 6. The upper end of the pier body 4 has a limb 13 structure. The present invention utilizes the structural characteristics of the limbs 13 of the pier body 4. Holes 14 are formed between adjacent limbs 13. When installing the tower crane foundation 5 and the wall 2 frame, a pair of first outer frames 7 are first installed. A first outer frame 7 is respectively arranged on the front and rear sides of all the limbs 13. The two ends of the first outer frame 7 extend horizontally along the width direction of the main beam and exceed the two outermost limbs 13 of the pier body 4. A pair of first outer frames 7 are located at the lower ends of the limbs 13, basically conflicting with the cross-sectional size change between the lower ends of the limbs 13 and the pier body 4. Then, the fine-rolled threaded steel bars 12 are pulled between the two first outer frames 7 to fasten the two first outer frames 7 to the bottom of the limbs 13. Fine-rolled threaded steel bars are arranged on the left and right sides of each limb 13 so that the first outer frame 7 can be fully and tightly attached to the corresponding side surfaces of each limb 13 to ensure a certain force transmission capacity and stabilize the frame 1. Supported on all branches 13, shear keys are installed. Shear keys are tightly arranged on the left and right sides of each branch 13. The shear keys are fixedly connected to the first outer frame 7 at the corresponding position, such as by welding. Then, a second outer frame 8 of suitable length is connected and installed between the two ends of a pair of first outer frames 7, so that the frame 1 forms a stable rectangular frame structure in the horizontal plane, surrounding all branches 13. Finally, all the fine-rolled threaded steel bars 12 are re-tightened. The tower crane foundation 5 transmits the horizontal force to the frame 1 through the wall 2. In view of the setting position of the tower crane foundation 5, the horizontal force is mainly the force in the width direction of the main beam. Therefore, the horizontal force received by the frame 1 is concentratedly transmitted to the branches 13, i.e., the pier body 4, through each shear key. The force is clear and the structural safety can be ensured. The shear keys on the left and right sides of each branch 13 are equivalent to limiting the frame 1 in the width direction of the main beam, and can also generate friction with the branches 13, so as to make the overall structure of the frame 1 more stable.

[0033] In another technical solution, Figure 2-4 As shown, two second outer frames 8 are spaced apart and connected between the ends of a pair of the first outer frames 7 close to the tower crane foundation 5 , and the attached wall 2 is connected to the second outer frame 8 closest to the tower crane foundation 5 .

[0034] By connecting a second outer frame 8 to the side of the frame 1 facing the tower crane foundation 5, the stability of the overall structure of the frame 1 on the corresponding side is enhanced, and the wall 2 directly transmits force through the connected second outer frame 8, avoiding the force influence on the rectangular frame structure originally fastened to all the branches 13, thereby ensuring the stability of force transmission.

[0035] In another technical solution, Figure 4 As shown, a diagonal brace 9 is symmetrically arranged along the width direction of the main beam between the two second outer frames 8 close to the tower crane foundation 5, and one end of the diagonal brace 9 is connected to the top corner between one of the first outer frames 7 and one of the second outer frames 8, and the other end is connected to the other second outer frame 8.

[0036] The diagonal braces 9 are provided to strengthen the local structural strength and structural stability, thereby ensuring stable and safe force transmission.

[0037] In another technical solution, Figure 3 , Figure 5 , Figure 6 As shown, the frame 1 is provided with two adjacent layers in the vertical direction, and a connecting plate 15 is fixed between the corresponding left and right side surfaces of two second outer frames 8 in the same vertical direction.

[0038] By continuously arranging two layers of frames 1 and connecting them as a whole through connecting plates 15, the structural stability of the frame 1 in the vertical direction is enhanced. Since the tower crane foundation 5 is relatively high, the overall vertical dimension of the frame 1 is increased, the vertical dimension of the attached wall 2 can be increased, and the connection area with the tower crane foundation 5 is increased, thereby ensuring the stability of force transmission from the tower crane foundation 5 to the attached wall 2 to the frame 1.

[0039] In another technical solution, Figure 3 , Figure 5 , Figure 6 As shown, the fine-rolled threaded steel bars 12 are passed between the two layers of the frame 1, and both ends of each fine-rolled threaded steel bar 12 extend out of the frame 1 for tensioning and then are anchored by anchors 16, and the upper and lower ends of each anchor 16 respectively contact the corresponding upper and lower first outer frames 7.

[0040] By arranging each fine-rolled threaded steel bar 12 between two layers of the frame 1, it is avoided to directly punch holes in the first outer frame 7 to pierce the fine-rolled threaded steel bar 12, thereby ensuring the rigidity and strength of the first outer frame 7 structure and the stability of the overall frame 1 structure. After pulling the fine-rolled threaded steel bar 12, the two frames 1 on the upper and lower sides can be fastened at the same time through the anchor 16, which is also convenient for installation and removal.

[0041] In another technical solution, Figure 1-4As shown, the pier body 4 is a double-limb structure, and the side of the two limbs 13 that are away from each other is a semicircular arc structure with opposite centers. The shear key includes a first shear key 10 and a second shear key 11. The shear key located on one side of the semicircular arc structure of the limb 13 is the first shear key 10. The first shear key 10 is consistent with the semicircular arc structure shape of the limb 13 on the side close to the corresponding limb 13, and the front and rear sides are respectively fixedly connected to the first outer frame 7 on the corresponding side. The second shear key 11 is located between the two limbs 13, and a second shear key 11 is respectively connected between each limb 13 and a pair of the first outer frames 7.

[0042] Taking advantage of the structural characteristics of the limbs 13 of the pier body 4, that is, the double-limb structure has semicircular structures at both ends in the width direction of the main beam and a flat structure in the middle, an integral first shear key 10 with a corresponding semicircular groove shape is arranged on one side of the semicircular structure of the outermost limb 13, and two second shear keys 11 are symmetrically arranged on the inner side of each limb 13, that is, on one side of the hole 14, to ensure stable force transmission in the width direction of the main beam and avoid the generation of component forces in other directions that affect the structural stability of the frame 1.

[0043] In another technical solution, Figure 4 As shown, the limbs 13 of the pier body 4 are all hollow structures, and the second shear key 11 is arranged between the corresponding limb 13 and the adjacent finished rolled threaded steel bar 12, and the shape of the second shear key 11 in the horizontal plane is complementary to the shape of the hollow structure at the top corner near the corresponding second shear key 11.

[0044] The limb 13 of the pier body 4 is a hollow structure with a certain shape. The second shear key 11 is connected to the first outer frame 7 and the inner side of the limb 13 of the pier body 4. The second shear key 11 is set to the same shape as the top corner at the corresponding position of the hollow structure, so as to enhance the stability of the force transmission structure.

[0045] The present invention also provides a construction method for a tower crane foundation attached to a wall frame, such as Figure 1-5 As shown, the following steps are included:

[0046] S1, using the structure of the limbs 13 of the pier body 4, a first outer frame 7 is respectively provided on the front and rear sides of all the limbs 13, and two first outer frames 7 are respectively drawn with fine-rolled threaded steel bars 12 on the left and right sides of all the limbs 13 to fasten the two first outer frames 7 to the bottom of the limbs 13;

[0047] S2. The second outer frame 8 is fixedly connected between a pair of the first outer frames 7, and the shear keys are fixedly connected to each connection between the left and right sides of each limb 13 and a pair of the first outer frames 7, respectively, and the shear keys are tightly attached to the corresponding limbs 13.

[0048] S3, synchronously re-tighten all the precision-rolled threaded steel bars 12, and pad the parts of the first outer frame 7, the shear key and the corresponding limbs 13 that are not in close contact with each other, to ensure that the limbs 13 are in close contact with the pier body 4.

[0049] S4, installing the tower crane foundation 5, fixing the attached wall 2 between the second outer frame 8 closest to the tower crane foundation 5 and the tower crane foundation 5, and transmitting the horizontal force generated by the attached wall 2 to the pier body 4 through the shear key.

[0050] In a specific embodiment, the pier body 4 is a double-limb structure, and the shear key includes the first shear key 10 located on the outside of the two limbs 13 in the width direction of the main beam and the second shear key 11 located between the two limbs 13. The second shear key 11 is first welded and fixed to the first outer frame 7, and then the first outer frame 7 is installed on the front and rear sides of the limbs 13. When operating the high-quality rolled threaded steel bars 12, first install and pull the two high-quality rolled threaded steel bars 12 located between the two limbs 13, and then install and pull the two high-quality rolled threaded steel bars 12 located outside the two limbs 13.

[0051] When setting the first shear key 10 and the second shear key 11, Midas-Civil is used to establish an overall calculation model of the tower crane foundation 5, the attached wall 2 and the frame 1, and the strength, stiffness and stability of the tower crane foundation 5, the attached wall 2 and the frame 1 under the most unfavorable working conditions are calculated. The forces of all the first shear keys 10 and the second shear keys 11 are derived through Midas-Civil, and the strength of all the first shear keys 10 and the second shear keys 11 is verified.

[0052] To sum up, the tower crane foundation attached wall frame of the present invention installs the frame on the pier body, connects the frame and the tower crane foundation through the wall, transmits the horizontal force generated by the wall to the pier body through the shear key, and each component can be processed in sections at the back field and hoisted in sections on site, which solves the production and installation problems of the wall-attached frame without embedded parts. At the same time, the construction method without embedded parts can reduce the damage to the pier body, save materials, have certain economic and social benefits, have promotion and application value, and meet the requirements of green construction.

[0053] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A tower crane foundation attached wall frame, characterized in that: The pier comprises a frame, the pier body has limbs, the frame is arranged at the lower end of all the limbs of the pier body, the frame comprises a pair of first outer frames which are parallel to each other and horizontally arranged on the front and rear sides of all the limbs, the first outer frames extend along the width direction of the main beam and are arranged in close contact with the corresponding sides of all the limbs, a second outer frame is connected between both ends of the pair of first outer frames, and a rectangular frame structure which surrounds all the limbs inside is formed on the horizontal plane, fine-rolled threaded steel bars are respectively arranged for tension between the pair of first outer frames on the left and right sides of each limb, a shear key is connected to the first outer frame at the top corners of the left and right sides of each limb, a tower crane foundation is arranged on one side of the pier body in the width direction of the main beam, and an attached wall is connected between the tower crane foundation and the second outer frame closest to the tower crane foundation; The pier body is a double-limb structure, and the sides of the two limbs that are away from each other are semicircular arc structures with opposite centers. The shear key includes a first shear key and a second shear key. The shear key located on one side of the semicircular arc structure of the limb is the first shear key. The first shear key is consistent with the semicircular arc structure of the limb on the side close to the corresponding limb, and the front and rear sides are respectively fixedly connected to the first outer frame on the corresponding side. The second shear key is located between the two limbs, and each limb is connected to a pair of the first outer frames with a second shear key. The limbs of the pier body are all hollow structures, the second shear key is arranged between the corresponding limb and the adjacent finished rolled threaded steel bar, and the shape of the second shear key in the horizontal plane is complementary to the shape of the hollow structure at the top corner near the corresponding second shear key.

2. The tower crane foundation attached wall frame according to claim 1, characterized in that: A pair of the first outer frames are connected with two second outer frames at intervals between the ends close to the tower crane foundation, and the attached wall is connected to the second outer frame closest to the tower crane foundation.

3. The tower crane foundation attached wall frame according to claim 2, characterized in that: A diagonal brace is symmetrically arranged between the two second outer frames close to the tower crane foundation along the width direction of the main beam, one end of the diagonal brace is connected to the top corner between one of the first outer frames and one of the second outer frames, and the other end is connected to the other second outer frame.

4. The tower crane foundation attached wall frame according to claim 2, characterized in that: The frame is arranged in two adjacent layers in the vertical direction, and two second outer frames in the same vertical direction are respectively fixed with connecting plates between corresponding left and right side surfaces.

5. The tower crane foundation attached wall frame according to claim 4, characterized in that: The fine-rolled threaded steel bars are passed between the two layers of the frames, and both ends of each fine-rolled threaded steel bar extend out of the frame for tensioning and then are anchored by anchors, and the upper and lower ends of each anchor are respectively in contact with the corresponding upper and lower first outer frames.

6. The construction method of the tower crane foundation attached wall frame according to any one of claims 1 to 5, characterized in that: The steps include: S1, using the limb structure of the pier body, the first outer frames are respectively set on the front and rear sides of all the limbs, and the two first outer frames are respectively drawn with fine-rolled threaded steel bars on the left and right sides of all the limbs to fasten the two first outer frames to the bottom of the limbs; S2, the second outer frame is fixedly connected between a pair of the first outer frames, and the shear keys are respectively fixedly connected at the left and right sides of each of the branches and each connection between the pair of the first outer frames, and the shear keys are closely attached to the corresponding branches; S3, synchronously re-tightening all the precision-rolled threaded steel bars, padding the parts of the first outer frame, the shear key and the corresponding limbs that are not in close contact with each other, to ensure that they are in close contact with the limbs of the pier body; S4, installing the tower crane foundation, fixing and connecting the attached wall between the second outer frame closest to the tower crane foundation and the tower crane foundation, and transmitting the horizontal force generated by the attached wall to the pier body through the shear key.

7. The construction method of the tower crane foundation attached wall frame as claimed in claim 6, characterized in that: The pier body is a double-limb structure, and the shear keys include the first shear keys located on the outside of the two limbs in the width direction of the main beam and the second shear keys located between the two limbs. The second shear keys are first welded and fixed to the first outer frame, and then the first outer frame is installed on the front and rear sides of the limbs. When operating the high-quality rolled threaded steel bars, first install and pull the two high-quality rolled threaded steel bars located between the two limbs, and then install and pull the two high-quality rolled threaded steel bars located outside the two limbs.

8. The construction method of the tower crane foundation attached wall frame according to claim 6, characterized in that: When setting the first shear key and the second shear key, Midas-Civil is used to establish an overall calculation model of the tower crane foundation, attached wall and frame, and the strength, stiffness and stability of the tower crane foundation, attached wall and frame under the most unfavorable working conditions are calculated. The forces of all the first shear keys and the second shear keys are derived through Midas-Civil, and the strength of all the first shear keys and the second shear keys is verified.

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