A prefabricated assembly structure and method for use in high-intensity seismic zones

Abstract

This application relates to a prefabricated assembly structure and method for use in high-intensity seismic zones, belonging to the field of bridge construction. The prefabricated assembly structure and method for use in high-intensity seismic zones includes several pier blocks that can be assembled together. A first connecting structure is located at one end of each pier block, assisting in connecting the pier block to other pier blocks. A second structure is located at the end of each pier block away from the first connecting structure, connecting with the first connecting structure on the pier block it is assembling with, and cooperating with the first connecting structure to convert the lateral vibration force on the pier into longitudinal tension. This application can guide most of the lateral shear force into longitudinal tension through the inclined surface of the guide platform. A mortise and tenon structure can be formed by applying paint or oil and then pouring concrete, eliminating the need to manufacture another set of molds to match the abutment structure and reducing the manufacturing cost of the pier components.

Description

Technical Field

[0001] This application relates to the field of bridge construction technology, and in particular to a prefabricated assembly structure and method for use in high-intensity seismic zones. Background Technology

[0002] Currently, elevated bridges are typically used in low-intensity seismic zones with a seismic fortification intensity of 6-7 degrees. Due to the shear strength constraints of traditional prefabricated structures, there is a risk of fracture and deformation when building elevated bridges in high-intensity zones with a seismic fortification intensity of 8 degrees or higher. If high-intensity zones are bypassed, the number and length of bridges will increase, which will increase both construction costs and travel distance. Therefore, it is necessary to design a bridge structure that can be used in high-intensity zones. Summary of the Invention

[0003] This application provides a prefabricated assembly structure and method for use in high-intensity seismic zones, in order to solve the problem of poor shear strength of viaducts in high-intensity seismic zones in related technologies.

[0004] The first aspect of this application provides a prefabricated assembly structure for use in high-intensity seismic zones, including...

[0005] A block, wherein there are several blocks, and the blocks can be assembled together;

[0006] A first connecting structure is disposed at one end of the pier block, which assists in connecting the pier block with other pier blocks.

[0007] The second connecting structure is located at the end of the pier block away from the first connecting mechanism. The second connecting structure is used to connect with the first connecting structure on the pier block that it is assembled with, and to position and fix the first connecting structure. It also works with the first connecting structure to convert the lateral vibration force on the pier into longitudinal tension.

[0008] In some embodiments, the first connection structure includes a guide platform disposed on the end face of the pier block, a first reinforcing bar disposed on the guide platform, a positioning platform disposed on the end face of the pier block, and a second reinforcing bar disposed on the end face of the pier block;

[0009] The positioning platform is provided with several third steel bars arranged at equal intervals along the length of the positioning platform.

[0010] In some embodiments, there are two positioning platforms, which are respectively disposed on the left and right sides of the guide platform;

[0011] The second reinforcing bar has two sets, which are respectively set on the front and rear sides of the guide platform. Each set of the second reinforcing bar has several bars and they are arranged at equal intervals along the length of the block.

[0012] In some embodiments, the outer side of the guide platform is coated with a paint that allows it to separate from the concrete.

[0013] In some embodiments, the second connection structure includes a guide groove formed on the pier and a support block disposed on the pier.

[0014] In some embodiments, the support blocks are arranged in a matrix on the end face of the block.

[0015] In some embodiments, it also includes

[0016] The fourth reinforcing bar has two parts, which are respectively disposed on both sides of the guide platform;

[0017] A pressure mold, wherein the pressure mold is disposed on the outside of the connection between the first connecting structure and the second connecting structure;

[0018] The pressure mold has an inlet for pouring concrete and an opening for inserting a fourth reinforcing bar.

[0019] In some embodiments, the positioning platform is inserted between two support blocks.

[0020] In some embodiments, the first reinforcing bar may be inserted into a guide groove.

[0021] The second aspect of this application provides a method for prefabricated assembly structures applied in high-intensity seismic zones, including the following steps:

[0022] When assembling bridge piers, the bridge foundation is poured first, and then the precast pier blocks are hoisted onto the bridge foundation. When the pier blocks are initially hoisted, the outside of the guide platform needs to be coated with paint so that the guide platform and the concrete can be separated after the pier blocks are poured with concrete.

[0023] Next, the first, second, and third reinforcing bars on the pier are embedded into the bridge foundation. Then, a pressure mold is fitted on the outside of the connection between the pier and the bridge foundation. Concrete is then poured in through the inlet on the pressure mold. After the concrete overflows from the opening, two fourth reinforcing bars are inserted through the two openings respectively, positioning them on both sides of the guide platform and sealing the openings. Then, concrete is poured in until the interior is completely filled.

[0024] After the first pier block and bridge foundation are assembled and poured, the second pier block is hoisted. At the same time, paint is applied to the outside of the guide platform of the second pier block during the initial hoisting. Then the second pier block is hoisted above the first pier block.

[0025] Then, the first steel bar is inserted into the guide groove of the first pier block to play a guiding role. Then, the positioning platform is inserted between the two support blocks. The two pier blocks are positioned again through the cooperation between the support blocks and the positioning platform, so that the two pier blocks are initially matched. Then, manual fine-tuning can make the two pier blocks completely match. Then, the second pier block is lowered so that the third steel bar abuts against the pier block.

[0026] After the first block and the second block are spliced ​​together, a pressure mold is wrapped around the outside. Then concrete is poured in from the inlet of the pressure mold. After the concrete overflows from the opening, two fourth steel bars are inserted into the opening, positioned on both sides of the guide platform, and the opening is sealed. Then concrete is poured until it is completely filled.

[0027] Finally, repeat the above steps until the required pier blocks for the bridge pier are assembled.

[0028] This application provides a prefabricated assembly structure and method for use in high-intensity seismic zones. Because the inclined surface of the guide platform converts most of the lateral shear force into longitudinal tension, the first reinforcing bar, which has the thickest diameter and best tensile strength, acts as the main force, while the third reinforcing bar assists in bearing the longitudinal component. The second reinforcing bar not only improves the concrete's bearing capacity and shear resistance but also provides better guidance. The longitudinal tension is borne by the reinforcing bar, ensuring the pier does not deform or break laterally. Furthermore, the mortise and tenon structure can be formed simply by applying paint or oil and then pouring concrete a second time, eliminating the need for an additional set of molds to match the abutment structure and reducing the manufacturing cost of the pier components. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is an assembly diagram provided for an embodiment of this application;

[0031] Figure 2 A first structural schematic diagram provided for an embodiment of this application;

[0032] Figure 3 A schematic diagram of the second mechanism provided for an embodiment of this application;

[0033] Figure 4 This is a structural schematic diagram of the pressure mold used in this application.

[0034] 1. Pier block; 2. Guide groove; 5. Guide platform; 6. First reinforcing bar; 7. Positioning platform; 8. Second reinforcing bar; 9. Third reinforcing bar; 11. Support block; 12. Pressure mold; 13. Fourth reinforcing bar; 14. Opening; 15. Pouring inlet. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] This application provides a prefabricated assembly structure and method for use in high-intensity seismic zones, which can solve the problem of poor shear strength of existing viaducts in high-intensity seismic zones.

[0037] See Figure 1 As shown, the first aspect of this application provides a prefabricated assembly structure for use in high-intensity seismic zones, including...

[0038] Pier 1, first connecting structure and second connecting structure.

[0039] Among them, there are several pier blocks 1, and several pier blocks 1 can be spliced ​​together. The modular pier blocks 1 bridge piers are easy to install, and the number can be freely adjusted according to the height of the bridge piers.

[0040] The first connecting mechanism is located at one end of the pier block 1, and is used to assist the pier block 1 in connecting with other pier blocks 1.

[0041] The second connecting structure is located at the end of the pier block 1 away from the first connecting structure. The second connecting structure is used to connect with the first connecting structure on the pier block 1 that it is assembled with. It also plays a role in positioning and fixing when the first connecting structure connects to the second connecting structure, and cooperates with the first connecting structure to convert the lateral shear force on the pier into longitudinal tension force.

[0042] In some alternative embodiments, see Figure 1-3 As shown, the first connecting structure includes a guide platform 5 fixed to the end face of the pier block 1, a first reinforcing bar 6 fixed to the guide platform, a positioning platform 7 fixed to the end face of the pier block 1, and a second reinforcing bar 8 fixed to the end face of the pier block 1.

[0043] The guide platform 5 is in the shape of a trapezoid, and the area of ​​the end face fixed on the pier 1 is larger than the area of ​​the end face away from the pier 1, so that the guide platform 5 is in the shape of an inverted trapezoid, making it easy to insert the guide platform 5 into the guide groove 2 that it matches. By using the inclined side of the trapezoid, when the pier is under force, it slides along the direction of the inclined side, so that the direction of the force changes.

[0044] Several third steel bars 9 are fixed on the positioning platform 7, arranged at equal intervals along the length of the positioning platform 7.

[0045] The first reinforcing bar 6, the second reinforcing bar 8, and the third reinforcing bar 9 are all placed in the mold during the manufacturing of the block 1 and then cast. A portion of them protrudes from one end of the block 1 to form the first reinforcing bar 6, the second reinforcing bar 8, and the third reinforcing bar 9.

[0046] The first reinforcing bar 6 has the largest diameter, followed by the third reinforcing bar 9, and then the second reinforcing bar. The extended end of the first reinforcing bar 6 is longer than that of the second and third reinforcing bars 6, and is used to embed into the guide groove 2. The largest diameter of the first reinforcing bar 6 improves its tensile strength and provides a certain degree of toughness. Its end can also be designed as a hook to further enhance its tensile strength when combined with concrete. The third reinforcing bar 9 has the second largest diameter but the highest hardness, while the second reinforcing bar 8 has the highest plasticity.

[0047] In this embodiment, there are two positioning platforms 7, located on the left and right sides of the guide platform 5 respectively, and two sets of second reinforcing bars 8, located on the front and rear sides of the guide platform 5 respectively. Each set of second reinforcing bars 8 has several bars and is arranged at equal intervals along the length of the block 1.

[0048] In this embodiment, the outer side of the guide platform 5 is coated with a paint that allows the remaining concrete to separate. The paint can be oil or paint. By applying oil or paint in advance, the concrete will not come into contact with the guide platform 5 during pouring, thus separating it from the guide platform 5 and preventing it from being fixed in place. The subsequently poured concrete will only adhere to the guide platform 5 but not connect with it, forming a mortise and tenon structure with the guide platform 5. When the pier receives lateral shear force, the guide platform 5 will be squeezed by the lateral shear force and will slide upward due to the inclined side, thus guiding most of the lateral shear force to be converted into longitudinal tension. At this time, the first reinforcing bar 6, the second reinforcing bar 8, and the third reinforcing bar 9 will bear the longitudinal tension, ensuring that the pier does not deform or break laterally. The coating of paint allows the subsequently poured concrete to naturally separate from the guide platform 5, avoiding the need to make another set of mold structures to match the guide platform 5, and reducing manufacturing costs.

[0049] In this embodiment, the first reinforcing bar 6 can be inserted into the guide groove 2. The first reinforcing bar 6 is embedded in the guide groove 2 and plays an initial directional role, thus preventing excessive skewness when splicing the block 1.

[0050] In some alternative embodiments, see Figure 1-3As shown, the second connection structure includes a guide groove 2 opened on the pier block 1 and a support block 11 fixed on the pier block 1. The guide groove 2 is connected to the guide platform 5, and the support block 11 is used to fix and position the positioning platform 7.

[0051] In this embodiment, four support blocks 11 are arranged in a matrix at the four corners of the end face of the pier block 1.

[0052] In this embodiment, the positioning platform 7 is inserted between the two support blocks 11. The two positioning platforms 7 are respectively inserted between the two support blocks 11 on the left and right sides, so that when the block 1 is spliced ​​with another block 1, the positioning platform 7 is inserted between the two support blocks 11 to fix it in place.

[0053] In some alternative embodiments, see Figure 1-4 As shown, it also includes a fourth reinforcing bar 13 and a pressure mold 12.

[0054] Among them, there are two fourth steel bars 13 respectively set on both sides of the guide platform 5. When the fourth steel bar 13 is subjected to lateral force, it plays a guiding role and moves along the inclined surface of the guide platform 5. At the same time, it increases the bearing capacity of the concrete on the other side and reduces the probability of cracking when the later poured concrete is subjected to lateral load.

[0055] The pressure mold 12 is a template that covers the outside of the connection between the two blocks 1. It is then fixed and clamped between each pair of templates by bolts and screws, so that the template is fastened to the connection. It is used to pour concrete and shape it. The pressure mold 12 has a pouring inlet 15 for pouring concrete and an opening 14 for inserting the fourth reinforcing bar 13. When the concrete overflows from the opening 14 after being poured in, the fourth reinforcing bar 13 is inserted to seal the opening 14. At the same time, the fourth reinforcing bar 13 can be inserted to increase the load-bearing capacity. Then, the concrete is poured until it is completely filled.

[0056] See Figure 1-4 As shown, a second aspect of this application provides a method for prefabricated assembly structures applied in high-intensity seismic zones, including...

[0057] The first step is to first pour the bridge foundation when assembling the bridge piers. Then, the precast pier block 1 is hoisted onto the bridge foundation. When the pier block 1 is initially hoisted, the outside of the guide platform 5 needs to be coated with paint so that after the pier block 1 is poured with concrete, the guide platform 5 will not stick to the concrete due to the paint, and the guide platform 5 and the concrete can be set separately.

[0058] The second step involves embedding the first reinforcing bar 6, the second reinforcing bar 8, and the third reinforcing bar 9 on the pier block 1 into the bridge foundation. Then, a pressure mold 12 is fitted onto the outer side of the connection between the pier block 1 and the bridge foundation. Concrete is then poured in through the inlet 15 on the pressure mold 12. After the concrete overflows from the opening 14, two fourth reinforcing bars 13 are inserted through the two openings 14 respectively, positioning them on both sides of the guide platform 5 and sealing the openings 14. Concrete is then poured in until the interior is completely filled.

[0059] The third step is to continue hoisting the second pier 1 after the first pier block 1 and the bridge foundation are assembled and poured. At the same time, when it is initially hoisted, paint is applied to the outside of the guide platform 5 of the second pier block 1, and then the second pier block 1 is hoisted above the first pier block 1.

[0060] Fourth step: Then insert the first reinforcing bar 6 into the guide groove 2 of the first pier block 1 to play a guiding role. Then insert the positioning platform 7 between the two support blocks 11. The support blocks 11 and the positioning platform 7 are positioned again through cooperation, so that the two pier blocks 1 are initially matched. Then, manual fine adjustment can make the two pier blocks 1 completely match. Then continue to lower the second pier block 1 so that the third reinforcing bar 9 abuts against the pier block 1.

[0061] Step 5: After the first block 1 and the second block 1 are spliced ​​together, the pressure mold 12 is wrapped around the outside. Then, concrete is injected from the grouting inlet 15 of the pressure mold 12. After the concrete overflows from the opening 14, two fourth steel bars 13 are inserted into the opening, so that they are located on both sides of the guide platform 5, and the opening 14 is sealed. Then, the concrete is poured until it is completely filled.

[0062] Step 6: Finally, repeat the above steps starting from step 3 until the required pier block 1 is assembled.

[0063] The working principle and process of this application:

[0064] When assembling the bridge piers, the bridge foundation is poured first, and then the precast pier block 1 is hoisted onto the bridge foundation. When the pier block 1 is initially hoisted, the outside of the guide platform 5 needs to be coated with paint so that the guide platform 5 can be separated from the concrete after the pier block 1 is poured.

[0065] Next, the first steel bar 6, the second steel bar 8, and the third steel bar 9 on the pier block 1 are embedded into the bridge foundation. Then, a pressure mold 12 is fitted on the outside of the connection between the pier block 1 and the bridge foundation. Concrete is then poured in through the inlet 15 on the pressure mold 12. After the concrete overflows from the opening 14, two fourth steel bars 13 are inserted through the two openings 14 respectively, so that they are located on both sides of the guide platform 5 and the openings 14 are sealed. Then, concrete is poured in until the interior is completely filled.

[0066] After the first pier block 1 is assembled and poured with the bridge foundation, the second pier block 1 is hoisted. At the same time, paint is applied to the outside of the guide platform 5 of the second pier block 1 during the initial hoisting. Then the second pier block 1 is hoisted above the first pier block 1.

[0067] Then, the first reinforcing bar 6 is inserted into the guide groove 2 of the first pier block 1 to play a guiding role. Then, the positioning platform 7 is inserted between the two support blocks 11. The support blocks 11 and the positioning platform 7 are positioned again through cooperation, so that the two pier blocks 1 initially fit together. Then, manual fine-tuning can make the two pier blocks 1 fit together completely. Then, the second pier block 1 is lowered so that the third reinforcing bar 9 abuts against the pier block 1.

[0068] After the first block 1 and the second block 1 are spliced ​​together, the pressure mold 12 is wrapped around the outside, and then concrete is injected from the grouting inlet 15 of the pressure mold 12. After the concrete overflows from the opening 14, two fourth steel bars 13 are inserted into the opening, so that they are located on both sides of the guide platform 5, and the opening 14 is sealed. Then, concrete is poured until it is completely filled.

[0069] Finally, repeat the above steps until the required pier block 1 is assembled.

[0070] This allows the spliced ​​pier components to be assembled into prefabricated piers. Under the boundary effect of paint and oil, the post-cast part and the protruding guide platform 5 of the pier component form a mortise and tenon connection. When subjected to lateral vibration, the inclined surface of the guide platform 5 guides most of the lateral shear force into longitudinal tension. At this time, the first steel bar 6 with the thickest diameter and best tensile strength is the main force, and the third steel bar 9 serves as an auxiliary to bear the longitudinal component force. The second steel bar 8 is set to improve the bearing capacity of the concrete and its own shear resistance, while also playing a better guiding role. At this time, the steel bar bears the longitudinal tension, reducing the probability of lateral deformation and fracture of the pier. Moreover, the mortise and tenon structure can be formed by simply applying paint or oil and pouring concrete a second time, eliminating the need to make another set of molds to match the abutment structure and reducing the manufacturing cost of the pier components.

[0071] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0072] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0073] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A prefabricated assembly structure for use in high-intensity seismic zones, characterized in that, include: Block (1), there are several blocks (1), and several blocks (1) can be assembled with each other; The first connecting structure is disposed at one end of the pier (1) and assists the pier (1) in connecting with other piers (1); The second connecting structure is located at the end of the pier block (1) away from the first connecting structure. The second connecting structure is used to connect with the first connecting structure on the pier block (1) that it is assembled with, and to fix the first connecting structure in position. It also works with the first connecting structure to convert the lateral vibration force on the pier into longitudinal tension. The first connection structure includes a guide platform (5) disposed on the end face of the pier (1), a first steel bar (6) disposed on the guide platform (5), a positioning platform (7) disposed on the end face of the pier (1), and a second steel bar (8) disposed on the end face of the pier (1). The second connection structure includes a guide groove (2) opened on the pier (1) and a support block (11) set on the pier (1); The guide platform (5) is in the shape of a trapezoid, and the area of ​​the end face fixed on the block (1) is greater than the area of ​​the end face away from the block (1), so that the guide platform (5) is in the shape of an inverted trapezoid, making it easy for the guide platform (5) to be inserted into the guide groove (2) that it cooperates with.

2. The prefabricated assembly structure for use in high-intensity seismic zones as described in claim 1, characterized in that: The positioning platform (7) is provided with several third steel bars (9) arranged at equal intervals along the length of the positioning platform (7).

3. The prefabricated assembly structure for use in high-intensity seismic zones as described in claim 2, characterized in that: There are two positioning platforms (7), which are respectively set on the left and right sides of the guide platform (5); There are two sets of the second steel bars (8), which are respectively set on the front and rear sides of the guide platform (5). Each set of the second steel bars (8) has several bars and they are arranged at equal intervals along the length of the block (1).

4. The prefabricated assembly structure for use in high-intensity seismic zones as described in claim 2, characterized in that: The outer side of the guide platform (5) is coated with a paint that allows it to separate from the concrete.

5. The prefabricated assembly structure for use in high-intensity seismic zones as described in claim 1, characterized in that: The support blocks (11) are arranged in a matrix on the end face of the block (1).

6. The prefabricated assembly structure for use in high-intensity seismic zones as described in claim 1, characterized in that: Also includes: The fourth reinforcing bar (13) has two parts and is respectively located on both sides of the guide platform (5); A pressure mold (12) is disposed on the outside of the connection between the first connecting structure and the second connecting structure; The pressure mold (12) has an inlet (15) for pouring concrete and an opening (14) for inserting the fourth reinforcing bar (13).

7. The prefabricated assembly structure for use in high-intensity seismic zones as described in claim 1, characterized in that: The positioning platform (7) is inserted between the two support blocks (11).

8. The prefabricated assembly structure for use in high-intensity seismic zones as described in claim 1, characterized in that: The first reinforcing bar (6) can be inserted into the guide groove (2).

9. The method for applying prefabricated assembly structures in high-intensity seismic zones as described in claim 8, characterized in that: When assembling the bridge piers, the bridge foundation is poured first, and then the precast pier block (1) is hoisted onto the bridge foundation. When the pier block (1) is initially hoisted, the outer side of the guide platform (5) is coated with paint so that the guide platform (5) and the concrete can be separated after the pier block (1) is poured with concrete. Next, the first steel bar (6), the second steel bar (8) and the third steel bar (9) on the pier (1) are embedded into the bridge foundation. Then, the pressure mold (12) is fitted on the outside of the connection between the pier (1) and the bridge foundation. Then, concrete is poured in through the grouting inlet (15) on the pressure mold (12). After the concrete overflows from the opening (14), the two fourth steel bars (13) are inserted through the two openings (14) respectively, so that they are located on both sides of the guide platform (5) and the openings (14) are sealed. Then, concrete is poured in until the interior is completely filled. After the first pier block (1) is assembled and poured with the bridge foundation, the second pier block (1) is hoisted. At the same time, paint is applied to the outside of the guide platform (5) of the second pier block (1) during the initial hoisting. Then the second pier block (1) is hoisted above the first pier block (1). Then, the first steel bar (6) is inserted into the guide groove (2) of the first block (1) to play a guiding role. Then, the positioning platform (7) is inserted between the two support blocks (11). The support blocks (11) and the positioning platform (7) are positioned again through cooperation, so that the two blocks (1) are initially matched. Then, the two blocks (1) can be completely matched by manual fine adjustment. Then, the second block (1) is lowered so that the third steel bar (9) abuts against the block (1). After the first block (1) and the second block (1) are spliced ​​together, the pressure mold (12) is wrapped around the outside, and then concrete is injected from the grouting inlet (15) of the pressure mold (12). After the concrete overflows from the opening (14), two fourth steel bars (13) are inserted into the opening, so that they are located on both sides of the guide platform (5), and the opening (14) is sealed. Then, concrete is poured until it is completely filled. Finally, repeat the above steps until the required pier blocks (1) for the bridge piers are assembled.

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