Steel cylinder bridge pier structure

Abstract

This invention provides a steel cylinder bridge pier structure, including a base, a steel cylinder, a grid structure, and multiple support rods. The steel cylinder is fixed to the base, and a filling space is formed inside the steel cylinder. The grid structure is placed within the filling space and divides the filling space into multiple grid channels, each grid channel extending vertically and filled with crushed stone. Multiple support rods are fixed to the base vertically, each support rod corresponding to a grid channel, and inserted into the corresponding grid channel. The steel cylinder bridge pier structure provided by this invention allows the grid structure, support rods, crushed stone, and steel cylinder to jointly bear external loads, greatly improving the pier's bending and shear resistance. The crushed stone can evenly fill the gaps within the grid channels, improving the pier's compressive strength.

Description

Technical Field

[0001] This invention belongs to the field of bridge construction technology, specifically relating to a steel cylinder bridge pier structure. Background Technology

[0002] Bridge piers are structures that support the bridge span structure and transfer loads to the foundation. Abutments are located on both sides of the bridge, while piers are situated between the abutments. The function of piers is to support the bridge span structure, while abutments, in addition to supporting the bridge span structure, also connect to the embankment and prevent embankment landslides. These piers play a crucial role in high-speed railways and various cross-sea bridges. Commonly used gravity piers for beam bridges include rectangular piers, round-ended piers, and circular piers.

[0003] Currently, existing bridge piers are made of concrete. The process involves first erecting a pier formwork, then pouring concrete grout into the formwork, and finally, once the grout has solidified, the concrete pier is complete. However, concrete piers are monolithic structures, and during long-term operation, they are susceptible to brittle shear failure due to various natural disasters, leading to pier fracture. The strength of repaired piers is often lower than the original pier's structural strength, making them prone to secondary fractures and increasing maintenance costs. Furthermore, repaired piers pose increased safety hazards. Summary of the Invention

[0004] This invention provides a steel cylinder bridge pier structure, which aims to solve the technical problem that existing integrated bridge piers are prone to shear failure after long-term use, and the repaired bridge pier structure has low strength, causing safety hazards.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a steel cylinder bridge pier structure, comprising:

[0006] Base;

[0007] A steel cylinder is fixedly mounted on the base, and a filling space is formed inside the steel cylinder;

[0008] A grid structure is placed within the filling space and divides the filling space into multiple grid channels, each grid channel extending vertically and filled with crushed stone; and

[0009] Multiple support rods are fixed to the base along the vertical direction. Each support rod corresponds to a grid channel and is inserted into the corresponding grid channel.

[0010] In one possible implementation, reinforcing ribs are provided between the steel cylinder and the base.

[0011] In one possible implementation, the crushed stone comprises primary crushed stone and secondary crushed stone, wherein the primary crushed stone and secondary crushed stone are uniformly mixed to form a soil structure, and the particle size of the primary crushed stone is smaller than that of the secondary crushed stone.

[0012] In one possible implementation, the steel cylinder includes multiple steel cylinder bodies, which are sequentially spliced ​​together in a vertical direction. The steel cylinder body at the bottom is fixed to the base, and the steel cylinder body at the top is fixed to the bottom surface of the bridge. Adjacent steel cylinder bodies are connected by a connecting component.

[0013] In one possible implementation, the connection component includes:

[0014] An upper connecting plate is connected to the bottom end of the steel cylinder body, and the upper connecting plate has multiple upper connecting holes that extend through its own thickness;

[0015] A lower connecting plate is connected to the top of the steel cylinder body. The lower connecting plate has a lower connecting hole corresponding to the upper connecting hole, and the upper connecting plate abuts against the adjacent lower connecting plate.

[0016] The locking pin passes sequentially through the upper connecting hole and the corresponding lower connecting hole in the vertical direction.

[0017] In one possible implementation, the steel cylinder pier structure further includes a pier foundation, with the base fixed to the upper surface of the pier foundation.

[0018] In one possible implementation, the base has a fixing hole; the pier foundation has a fixing groove corresponding to the fixing hole; the steel cylinder pier structure also includes a fastener, which passes through the fixing hole from top to bottom and is screwed into the fixing groove.

[0019] In one possible implementation, the outer periphery of the steel cylinder is provided with a positioning protrusion, and the upper and lower shaft ends of the positioning protrusion are respectively connected to a reinforcing disc. The reinforcing disc is sleeved on the outer periphery of the steel cylinder, and the inner ring of the reinforcing disc abuts against the outer periphery of the steel cylinder.

[0020] In one possible implementation, the reinforcing disc includes a vertical sleeve and a horizontal connecting ring. The vertical sleeve and the horizontal connecting ring are coaxially arranged and perpendicularly connected to each other. The horizontal connecting ring is fixedly connected to the shaft end face of the positioning protrusion. The vertical sleeve is sleeved on the outer periphery of the steel cylinder and abuts against the outer periphery of the steel cylinder.

[0021] In one possible implementation, the positioning protrusion is connected and fixed to the reinforcing disc by a fastener. The positioning protrusion has a positioning hole in the vertical direction, and the reinforcing disc has a connecting hole corresponding to the positioning hole. The fastener passes through two connecting holes and the positioning hole in sequence.

[0022] The steel cylinder bridge pier structure provided by this invention has the following advantages compared with the prior art:

[0023] (1) The traditional one-piece concrete pouring method is abandoned. A grid structure is set inside the steel cylinder, forming multiple grid channels. Support rods are inserted into the grid channels, and the grid channels are also filled with crushed stone. The support rods serve as the first layer of support, the grid structure as the second layer of support, the crushed stone as the third layer of support, and the steel cylinder as the fourth layer of support. The four layers of support jointly bear the lateral load. When subjected to lateral shear force, the steel cylinder applies the first reverse force. The shear force is weakened into a primary pressure after passing through the steel cylinder. The grid structure abuts against the steel cylinder 2, and the grid structure applies a second reverse force to the steel cylinder. The primary pressure is weakened into a secondary pressure. The grid structure is subjected to a secondary pressure of inward bending. The grid channels are filled with a soil structure formed by crushed stone. Adjacent crushed stone particles in the soil structure abut against each other, resulting in high structural strength. The soil structure applies a second force to the grid structure. The first counterforce disperses the secondary pressure from the grid structure, weakening it into a tertiary pressure. This tertiary pressure is very weak and can be offset by a third counterforce provided by the support rod. The steel cylinder, grid structure, crushed stone, and support rod sequentially apply counterforces to gradually reduce the shear force until it disappears, greatly improving the pier's bending and shear resistance and preventing brittle failure. The crushed stone evenly fills the gaps in the grid channels, forming a stable soil structure. The grid structure increases the contact strength between crushed stone particles through its mesh, preventing the soil structure from becoming loose and giving it high compressive strength. It is not easily deformed under horizontal pressure, significantly improving the pier's compressive strength in the horizontal direction. The steel cylinder and the filled crushed stone jointly bear the downward pressure exerted by the bridge structure, ensuring that the pier can withstand the vertical pressure.

[0024] (2) The steel cylinder is installed outside the transverse grid plate and the longitudinal grid plate to constrain the soil structure formed by the crushed stone. It serves as a template to provide lateral constraint for the crushed stone. The steel cylinder can be used as a filling template for the crushed stone, saving the formwork process of the bridge pier, reducing the process, and speeding up the construction efficiency. After the bridge pier is completed, there is no need to dismantle the steel cylinder, saving the formwork removal process and saving manufacturing costs. It can also withstand external natural disasters.

[0025] (3) First install the support rods, then install the grid structure, and fill the steel cylinder with crushed stone. The whole process is compact. After filling, the pier construction is completed, which saves the solidification and curing steps of concrete pier pouring and speeds up the construction efficiency.

[0026] (4) Compared with the noise pollution generated by the pouring equipment and the wastewater pollution caused by the concrete slurry in concrete pouring, the grid structure is simple to manufacture and the crushed stone can be recycled after the bridge pier is abandoned. It will not pollute the environment itself and can greatly reduce the pollution effect on the environment. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the main structure of the steel cylinder bridge pier structure provided in Embodiment 1 of the present invention;

[0029] Figure 2 This is a top cross-sectional view of the steel cylinder bridge pier structure provided in Embodiment 1 of the present invention;

[0030] Figure 3 This is a schematic diagram of the assembly of the base and pier foundation used in Embodiment 1 of the present invention;

[0031] Figure 4 This is a schematic diagram of the assembly of the reinforcing disc and the positioning protrusion used in Embodiment 1 of the present invention;

[0032] Figure 5 This is a schematic diagram of the steel cylinder used in Embodiment 2 of the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Base; 11. Mounting holes; 12. Fasteners;

[0035] 2. Steel cylinder; 21. Steel cylinder body; 22. Connecting assembly; 221. Upper connecting plate; 222. Lower connecting plate; 223. Locking pin; 23. Positioning protrusion;

[0036] 3. Grille structure; 31. Horizontal grille plate; 32. Vertical grille plate;

[0037] 4. Support rod;

[0038] 5. Reinforcing ribs;

[0039] 6. Bridge pier foundations;

[0040] 7. Reinforcing disc; 71. Vertical sleeve; 72. Horizontal connecting ring; 73. Fastener;

[0041] 8. Crushed stone. Detailed Implementation

[0042] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0043] It should be noted that the terms "length", "width", "height", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", and "tail" 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, they should not be construed as limitations on the invention.

[0044] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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 of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Additionally, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0046] Please refer to the following: Figures 1 to 5 The steel cylinder bridge pier structure provided by the present invention will now be described. The steel cylinder bridge pier structure includes a base 1, a steel cylinder 2, a grid structure 3, and multiple support rods 4. The steel cylinder 2 is fixed to the base 1, and a filling space is formed inside the steel cylinder 2; the grid structure 3 is placed in the filling space and divides the filling space into multiple grid channels, each grid channel extending in the vertical direction and filled with crushed stone material 8; multiple support rods 4 are fixed to the base 1 in the vertical direction, and each support rod 4 corresponds to a grid channel, with the support rod 4 inserted into the corresponding grid channel.

[0047] It should be noted that the support rod 4 is a longitudinal steel bar. The longitudinal steel bar has high structural strength and is a hot-rolled ribbed steel bar with strength grades of HRB400, HRB500, HRBF400 or HRBF500.

[0048] It should be noted that the steel cylinder 2 is made of carbon steel Q235 grade, low-alloy high-strength structural steel Q345 grade, Q380 grade, or Q420 grade. This ensures that the steel cylinder 2 has good elasticity and plasticity in the horizontal direction, enabling it to withstand various natural disasters.

[0049] It should be noted that the crushed stone material 8 has uniformly sized particles that abut against each other within the grid channel to form a stable skeleton, thereby improving the horizontal compressive strength of the bridge pier.

[0050] It should be noted that the geogrid structure 3 uses a high-strength geogrid with a tensile strength of 240kN / m, 280kN / m or 300kN / m.

[0051] In practice, the steel cylinder 2 is a square cylinder with a rectangular cross-section in the vertical direction, which facilitates the longitudinal grating plate 32 and the transverse grating plate 31 to abut against the inner wall of the steel cylinder 2.

[0052] As an embodiment of the support rod 4 connecting to the base 1, it is inserted into the grid channel. The top end of the support rod 4 extends into the grid channel, and the bottom end is embedded in the base 1.

[0053] As another embodiment of the support rod 4 connecting to the base 1 and inserted into the grid channel, the top end of the support rod 4 passes through the steel cylinder 2 in the vertical direction and is connected to the bridge body.

[0054] In practice, the grid structure 3 has high tensile strength, the soil structure formed by the crushed stone 8 is stable and has high compressive strength, and the steel cylinder 2 has good elasticity and plasticity. After being assembled together, the pier has high tensile strength, high compressive strength and high elasticity and plasticity, which greatly improves the structural strength and structural stability of the pier.

[0055] The construction steps of this bridge pier are as follows: After the steel cylinder 2 is prefabricated in the factory, it is transported to the construction site. The steel cylinder 2 serves as a formwork support and can withstand large lateral stress. The support rod 4 and the grid structure 3 can strengthen the structural strength of the main body of the bridge pier and improve the overall integrity of the bridge pier. The soil structure formed by the crushed stone material 8 has high strength and can withstand large loads.

[0056] The steel cylinder bridge pier structure provided in this embodiment has the following advantages compared with the prior art:

[0057] (1) The traditional one-piece concrete pouring method is abandoned. A grid structure 3 is set inside the steel cylinder 2. Multiple grid channels are formed inside the grid structure 3. Support rods 4 are inserted in the grid channels. The grid channels are also filled with crushed stone 8. The steel cylinder 2 serves as the first layer of support, the grid structure 3 serves as the second layer of support, the crushed stone 8 serves as the third layer of support, and the support rods 4 serve as the fourth layer of support. The four layers of support jointly bear the lateral load. When subjected to lateral shear force, the steel cylinder 2 applies the first reverse force. The shear force is weakened into a primary pressure after passing through the steel cylinder 2. The grid structure 3 abuts against the steel cylinder 2 and applies a second reverse force to the steel cylinder 2. The primary pressure is weakened into a secondary pressure. The grid structure 3 is subjected to a secondary pressure that bends inward. The grid channels 3 are filled with crushed stone 8 to form a soil structure. Adjacent crushed stone particles in the soil structure abut against each other, resulting in high structural strength. The soil structure is oriented towards the grid. The grid structure 3 applies a second reverse force, which can disperse the secondary pressure of the grid structure 3 inward. The secondary pressure is weakened into a tertiary pressure. The tertiary pressure is very weak and can be offset by the third reverse force provided by the support rod 4. The steel cylinder 2, grid structure 3, crushed stone 8 and support rod 4 apply reverse forces in sequence to gradually reduce the shear force to disappear. The transverse grid plate 31, longitudinal grid plate 32, support rod 4, crushed stone and steel cylinder 2 jointly bear the external load, which greatly improves the bending resistance of the pier and avoids brittle failure of the pier. The crushed stone 8 can uniformly fill the gaps in the grid channel, and the resulting soil structure is stable. The grid structure 3 increases the contact strength between crushed stone particles through its own mesh, and the soil structure will not be loose. It has the characteristics of high compressive strength and is not easily deformed under horizontal pressure, which can greatly improve the compressive strength of the pier in the horizontal direction.

[0058] (2) The steel cylinder 2 is fitted outside the transverse grid plate 31 and the longitudinal grid plate 32 to constrain the soil structure formed by the crushed stone. It serves as a template to provide lateral constraint for the crushed stone 8. The steel cylinder 2 can serve as a filling template for the crushed stone, saving the formwork process of the concrete pier, reducing the process, and speeding up the construction efficiency. After the pier is completed, there is no need to disassemble the steel cylinder 2, saving the formwork removal process and saving manufacturing costs; and it can withstand external natural disasters.

[0059] (3) First install the support rod 4, then install the grid structure 3, and after the steel cylinder 2 is installed, fill the crushed stone material 8. The whole process is compact. After the filling is completed, the pier construction is finished. The solidification and curing steps of concrete pier pouring are eliminated, which speeds up the construction efficiency.

[0060] (4) Compared with the noise pollution generated by the pouring equipment and the wastewater pollution caused by the concrete slurry in concrete pouring, the grid structure 3 is simple to manufacture and the crushed stone 8 can be recycled after the bridge pier is abandoned. It will not pollute the environment itself and can greatly reduce the pollution effect on the environment.

[0061] In some embodiments, the grid structure 3 includes a transverse grid plate 31 and a longitudinal grid plate 32. The surface of the transverse grid plate 31 is inserted into the filling space along a first horizontal direction; the surface of the longitudinal grid plate 32 is inserted into the filling space along a second horizontal direction, and the longitudinal grid plate 32 and the transverse grid plate 31 are arranged perpendicularly and alternately to form a plurality of grid channels, wherein the first horizontal direction and the second horizontal direction are perpendicular to each other.

[0062] It should be noted that, referring to Figure 2 The second horizontal direction is indicated by a solid arrow, while the first horizontal direction is indicated by a hollow arrow.

[0063] In practice, the transverse grid plates 31 and the longitudinal grid plates 32 have the same structure, and there are multiple transverse grid plates 31 and longitudinal grid plates 32 arranged perpendicularly to each other. The multiple transverse grid plates 31 are arranged at intervals along the second horizontal direction, and the multiple longitudinal grid plates 32 are arranged at intervals along the first horizontal direction.

[0064] It should be noted that multiple grid structures 3 are provided inside the steel cylinder 2 along the vertical direction. Between two adjacent grid structures 3, the transverse grid plate 31 is connected to the corresponding transverse grid plate 31, and the longitudinal grid plate 32 is connected to the corresponding longitudinal grid plate 32, so as to ensure that the grid channels arranged in the vertical direction are interconnected.

[0065] It should be noted that the channel formed by the longitudinal grating plate 32, the transverse grating plate 31 and the inner wall of the steel cylinder 2 has the same size as the grating channel, and the interior is also equipped with support rods 4 and crushed stone material 8.

[0066] In some embodiments, see Figure 1 and Figure 2 A reinforcing rib 5 is provided between the steel cylinder 2 and the base 1. The reinforcing rib 5 connects the base 1 and the steel cylinder 2 respectively, improves the connection strength between the steel cylinder 2 and the base 1, improves the stability of the pier, and prevents the steel cylinder 2 from overturning, which would cause the axis of the steel cylinder 2 to be misaligned with the axis of the base 1.

[0067] It should be noted that, under normal conditions, the axis of the steel cylinder 2 overlaps with the axis of the base 1.

[0068] In practice, the reinforcing rib 5 is made of metal plate, which has high structural strength and high bending strength.

[0069] In practice, multiple reinforcing ribs 5 are provided, and the multiple reinforcing ribs 5 are distributed and arranged around the outer periphery of the steel cylinder 2.

[0070] In practice, the reinforcing rib 5 has a vertical side, a horizontal side, and a diagonal side connected end to end. The vertical side is welded to the steel cylinder 2, and the horizontal side is welded to the upper surface of the base 1. The reinforcing rib 5 forms a triangular structure, which improves the connection stability between the base 1 and the steel cylinder 2.

[0071] In some embodiments, the crushed stone 8 comprises primary crushed stone and secondary crushed stone. The primary and secondary crushed stone are uniformly mixed to form a soil structure. The particle size of the primary crushed stone is smaller than that of the secondary crushed stone. The two-stage crushed stone 8 reduces the gaps between the crushed stones, improves the filling effect of the grid channels, and ensures the structural strength of the pier. During pouring, the secondary crushed stone abuts against each other to form the skeleton of the soil structure, while the primary crushed stone fills the gaps between adjacent secondary crushed stone, increasing the compactness of the soil structure. The soil structure formed by the primary and secondary crushed stone has high stability. The primary crushed stone fills the gaps between the secondary crushed stone, resulting in small settlement deformation, high compressive strength, and the ability to withstand horizontal shear forces.

[0072] It should be noted that when primary and secondary crushed stone are evenly mixed, the resulting soil structure is stable in both the vertical and horizontal directions. The primary and secondary crushed stone abut against each other, dispersing the forces from the vertical and horizontal directions.

[0073] In some embodiments, see Figure 5 The steel cylinder 2 comprises multiple steel cylinder bodies 21, which are sequentially spliced ​​together in a vertical direction. The bottom steel cylinder body 21 is fixed to the base 1, and the top steel cylinder body 21 is fixed to the bottom surface of the bridge. Adjacent steel cylinder bodies 21 are connected by a connecting component 22. The multiple steel cylinder bodies 21 facilitate the movement of the steel cylinder 2. Each section of the steel cylinder body 21 can be transported separately, saving on transportation costs and ensuring safety during transport. The steel cylinder 2 can be separated for convenient subsequent processing. The connecting component 22 connects the multiple steel cylinder bodies 21 together, resulting in a simple structure and low installation difficulty.

[0074] In some embodiments, see Figure 5 The connecting assembly 22 includes an upper connecting plate 221, a lower connecting plate 222, and a locking pin 223. The upper connecting plate 221 is connected to the bottom end of the steel cylinder body 21 and has multiple upper connecting holes that extend along its own thickness. The lower connecting plate 222 is connected to the top end of the steel cylinder body 21 and has a lower connecting hole corresponding to the upper connecting hole. The upper connecting plate 221 abuts against the adjacent lower connecting plate 222. The locking pin 223 passes through the upper connecting hole and the corresponding lower connecting hole in a vertical direction.

[0075] In practice, multiple upper connecting holes are provided, and these multiple upper connecting holes are evenly distributed along the outer periphery of the steel cylinder body 21. Correspondingly, multiple lower connecting holes are provided.

[0076] As one embodiment of the locking pin 223, the locking pin 223 is a bolt with a nut. The bolt passes through the upper connecting hole and the lower connecting hole in sequence, and then engages with the nut threadedly. The nut and the nut position the upper connecting plate 221 and the lower connecting plate 222 in the vertical direction to prevent the adjacent upper connecting plate 221 and the lower connecting plate 222 from rotating circumferentially.

[0077] As another embodiment of the locking pin 223, the locking pin 223 is a connecting rod that passes through both the upper connecting hole and the lower connecting hole. Each end of the connecting rod has an insertion hole that passes through the connecting rod radially. A stop block is inserted into each of the two insertion holes, and the two stop blocks position the connecting rod in the vertical direction.

[0078] The connecting component 22 provided in this embodiment has low construction difficulty and no complex mechanical structure. The upper connecting plate 221 and the lower connecting plate 222 are respectively connected to the two ends of the steel cylinder body 21. The two adjacent upper connecting plates 221 and the lower connecting plate 222 are fixed together by the locking pin 223, so that the two adjacent steel cylinder bodies 21 can be connected together, ensuring the connection strength. The upper connecting hole and the lower connecting hole are both set in the vertical direction. The locking pin 223 does not affect the connection sealing between the two steel cylinder bodies 21.

[0079] In some embodiments, a sealing gasket is installed between the upper connecting plate 221 and the lower connecting plate 222, which can further improve the connection sealing between the upper connecting plate 221 and the lower connecting plate 222, prevent the crushed stone material 8 from overflowing from the gap between the two adjacent steel cylinder bodies 21, ensure the stable formation of the soil structure, and result in a soil structure with small collapse and high strength.

[0080] As another embodiment of the connection between the upper connecting plate 221 and the lower connecting plate 222, the connecting assembly 22 also includes a sealing ring with a sealing groove on its inner side. Both the upper connecting plate 221 and the lower connecting plate 222 are embedded in the sealing groove. The sealing groove abuts against the upper connecting plate 221 and the lower connecting plate 222 from the upper and lower sides respectively, which improves the connection strength between the upper connecting plate 221 and the lower connecting plate 222. The upper connecting plate 221 and the lower connecting plate 222 will not easily separate, thus improving the connection sealing performance between the upper connecting plate 221 and the lower connecting plate 222. The groove wall of the sealing groove abuts against the gap between the upper connecting plate 221 and the lower connecting plate 222, preventing the crushed stone material 8 from overflowing from the gap between the two adjacent steel cylinder bodies 21, and ensuring the stable formation of the soil structure.

[0081] In some embodiments, see Figure 3The steel cylinder pier structure also includes a pier foundation 6, with a base 1 fixed to the upper surface of the pier foundation 6. The pier foundation 6, serving as the support for the pier, can be buried underground, increasing the contact area between the pier and the bottom surface and ensuring that the central axis of the pier is parallel to the vertical direction. The pier foundation 12 and the base 1 are fixedly connected. The steel cylinder 2, base 1, and pier foundation 12 work together to bear the lateral stress on the pier, ensuring the stability of the pier.

[0082] In practice, pier foundation 6 is a reinforced concrete foundation, cast from concrete mixed with reinforcing steel. The concrete used is ordinary concrete, lightweight aggregate concrete, or high-performance concrete.

[0083] During on-site construction, the bridge pier foundation 6 can be buried underground or partially buried underground.

[0084] In some embodiments, see Figure 2 The base 1 has a fixing hole 11; the pier foundation 6 has a fixing groove corresponding to the fixing hole 11. The steel cylinder pier structure also includes a fastener 12, which passes through the fixing hole 11 from top to bottom and is screwed into the fixing groove. The fastener 12 and the pier foundation 6 together clamp and position the base 1, ensuring that the axis of the steel cylinder 2 overlaps with the axis of the pier foundation 6. This allows the pier foundation 6 and the steel cylinder 2 to share the lateral stress, avoiding lateral stress concentration and improving the overall structural strength of the pier.

[0085] It should be noted that the bottom end of the support rod 4 is inserted into the pier foundation 6, which improves the connection strength between the pier and the pier foundation 6. The support rod 4 is connected to the pier foundation 6 as the first support. When the steel cylinder 2 is subjected to tilting stress, the support rod 4 provides a counterforce to ensure that the axis of the steel cylinder 2 always overlaps with the axis of the pier foundation 6, thus ensuring the overall structural strength of the pier.

[0086] In practice, before pouring the pier foundation 6, the bottom end of the support rod 4 is extended to the top of the pier foundation 6, and then the concrete is poured. After the pier foundation 6 is formed, the bottom end of the support rod 4 is embedded in the pier foundation 6.

[0087] In some embodiments, see Figure 1 and Figure 4The outer circumference of the steel cylinder 2 is provided with positioning protrusions 23. Reinforcing discs 7 are connected to the upper and lower ends of the positioning protrusions 23, respectively. The reinforcing discs 7 are fitted around the outer circumference of the steel cylinder 2, and their inner rings abut against the outer circumference of the steel cylinder 2. The reinforcing discs 7 protect the steel cylinder 2 in the horizontal direction. In this embodiment, the steel cylinder 2 is a single unit. The positioning protrusions 23 on the outer circumference of the steel cylinder 2, with reinforcing discs 7 at both ends, can clamp the steel cylinder 2 in the circumferential direction, preventing it from bending near the positioning protrusions 23 and ensuring that the axis of the steel cylinder 2 remains parallel to the vertical direction. The two reinforcing discs 7 can withstand high-intensity lateral shear forces, thereby protecting the steel cylinder 2.

[0088] In practice, the outer periphery of the steel cylinder 2 is provided with multiple positioning protrusions 23 at axial intervals, and each positioning protrusion 23 is connected to a reinforcing disc 7.

[0089] In some embodiments, see Figure 4 The reinforcing disc 7 includes a vertical sleeve 71 and a horizontal connecting ring 72. The vertical sleeve 71 and the horizontal connecting ring 72 are coaxially arranged and perpendicularly connected to each other. The horizontal connecting ring 72 is fixedly connected to the axial end face of the positioning protrusion 23. The vertical sleeve 71 is fitted onto the outer circumference of the steel cylinder 2 and abuts against the outer circumference of the steel cylinder 2. The vertical sleeve 71 abuts against the outer circumference of the steel cylinder 2, and the horizontal connecting ring 72 is connected to the axial end of the positioning protrusion 23. The vertical sleeve 71 and the horizontal connecting ring 72 cooperate to withstand lateral shear force, thereby protecting the steel cylinder 2 and preventing the steel cylinder 2 from directly bearing shear force, thus improving the protection effect on the bridge pier.

[0090] In some embodiments, see Figure 4 The positioning protrusion 23 and the reinforcing disc 7 are connected and fixed by a fastener 73. The positioning protrusion 23 has a positioning hole in the vertical direction, and the reinforcing disc 7 has a connecting hole corresponding to the positioning hole. The fastener 73 passes through two connecting holes and the positioning hole in sequence. The fastener 73 passes through the connecting hole, the positioning hole and the connecting hole in sequence from top to bottom, connecting the two reinforcing discs 7 and the positioning protrusion 23 together, which improves the connection strength between the reinforcing disc 7 and the steel cylinder 2. The steel cylinder 2 and the reinforcing disc 7 share the lateral shear force, reducing the damage to the steel cylinder 2.

[0091] In practice, the fastener 73 is a rivet. The rivet passes through the connecting hole, the positioning hole and the connecting hole in sequence to connect the reinforcing disc 7 and the positioning protrusion 23. The rivets are widely available and easy to disassemble, which can save costs and improve the efficiency of installation and disassembly.

[0092] In practice, multiple positioning holes are provided, and these multiple positioning holes are evenly distributed along the circumference of the steel cylinder 2. The connection holes are provided in multiple ways corresponding to the positioning holes.

[0093] When the bridge piers are under stress, refer to Figure 1 The horizontal forces are applied to the steel cylinder 2, the space between the steel cylinder 2 and the bottom plate 1, and the positioning protrusion 23. The reinforcing rib 5 counteracts the force applied between the steel cylinder 2 and the bottom plate 1; the reinforcing disc 7 counteracts the force applied to the positioning protrusion 23; the steel cylinder 2, the grid structure 3 inside the steel cylinder 2, the support rod 4, and the crushed stone 8 together resist the force applied to the steel cylinder 2.

[0094] See Figure 1 The vertical force is applied to the bridge pier from top to bottom. The soil structure formed by the crushed stone 8 and the steel cylinder 2 jointly bear the vertical force.

[0095] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A steel cylinder bridge pier structure, characterized in that, include: Base; A steel cylinder is fixedly mounted on the base, and a filling space is formed inside the steel cylinder; A grid structure is placed within the filling space and divides the filling space into multiple grid channels, each of which extends vertically and is filled with crushed stone. as well as Multiple support rods are fixed to the base along the vertical direction. Each support rod corresponds to a grid channel and is inserted into the corresponding grid channel. The crushed stone material includes primary crushed stone and secondary crushed stone. The primary crushed stone and secondary crushed stone are uniformly mixed to form a soil structure. The particle size of the primary crushed stone is smaller than that of the secondary crushed stone. The steel cylinder pier structure also includes a pier foundation, and the base is fixed to the upper surface of the pier foundation; The support rod is a longitudinal steel bar. The top end of the support rod passes through the steel cylinder in the vertical direction and is connected to the bridge body. The bottom end of the support rod is inserted into the pier foundation. The grid structure includes transverse grid plates and longitudinal grid plates. The surface of the transverse grid plates is inserted into the filling space along a first horizontal direction. The surface of the longitudinal grid plates is inserted into the filling space along a second horizontal direction. The longitudinal grid plates and the transverse grid plates are arranged perpendicularly and alternately to form multiple grid channels. Along the vertical direction, the steel cylinder is provided with a plurality of grid structures. Between two adjacent grid structures, the transverse grid plate is connected to the corresponding transverse grid plate, and the longitudinal grid plate is connected to the corresponding longitudinal grid plate, so that the grid channels arranged in the vertical direction are interconnected.

2. The steel cylinder bridge pier structure as described in claim 1, characterized in that, Reinforcing ribs are provided between the steel cylinder and the base.

3. The steel cylinder bridge pier structure as described in claim 1, characterized in that, The steel cylinder includes multiple steel cylinder bodies, which are sequentially spliced ​​together in the vertical direction. The steel cylinder body at the bottom is fixed to the base, and the steel cylinder body at the top is fixed to the bottom surface of the bridge. Adjacent steel cylinder bodies are connected by a connecting component.

4. The steel cylinder pier structure as described in claim 3, characterized in that, The connection component includes: An upper connecting plate is connected to the bottom end of the steel cylinder body, and the upper connecting plate has multiple upper connecting holes that extend through its own thickness; A lower connecting plate is connected to the top of the steel cylinder body. The lower connecting plate has a lower connecting hole corresponding to the upper connecting hole, and the upper connecting plate abuts against the adjacent lower connecting plate. The locking pin passes sequentially through the upper connecting hole and the corresponding lower connecting hole in the vertical direction.

5. The steel cylinder bridge pier structure as described in claim 1, characterized in that, The base has a fixing hole; the pier foundation has a fixing groove corresponding to the fixing hole; the steel cylinder pier structure also includes a fastener, which passes through the fixing hole from top to bottom and is screwed into the fixing groove.

6. The steel cylinder pier structure as described in claim 1, characterized in that, The steel cylinder has a positioning protrusion on its outer periphery. The upper and lower shaft ends of the positioning protrusion are respectively connected to a reinforcing disc. The reinforcing disc is sleeved on the outer periphery of the steel cylinder, and the inner ring of the reinforcing disc abuts against the outer periphery of the steel cylinder.

7. The steel cylinder pier structure as described in claim 6, characterized in that, The reinforcing disc includes a vertical sleeve and a horizontal connecting ring. The vertical sleeve and the horizontal connecting ring are coaxially arranged and perpendicularly connected to each other. The horizontal connecting ring is fixedly connected to the shaft end face of the positioning protrusion. The vertical sleeve is sleeved on the outer periphery of the steel cylinder and abuts against the outer periphery of the steel cylinder.

8. The steel cylinder bridge pier structure as described in claim 6, characterized in that, The positioning protrusion is connected and fixed to the reinforcing plate by a fastener. The positioning protrusion has a positioning hole in the vertical direction, and the reinforcing plate has a connecting hole corresponding to the positioning hole. The fastener passes through two connecting holes and the positioning hole in sequence.

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