Precast concrete pile and revetment structure using the same

Abstract

The application discloses a precast concrete pile and a revetment structure using the same. A pair of protrusions are respectively formed on both sides of a pile body and are centrally symmetric about the center line of the pile body. Reinforcing bars are arranged in the protrusions. When a pair of precast concrete piles are connected, the first extension part of one protrusion is embedded in the groove of the other protrusion. The projections of the pair of first extension parts along the arrangement direction of the precast concrete piles at least partially coincide. The projection of the first extension part of one protrusion and the second extension part of the other protrusion along the direction perpendicular to the arrangement direction of the precast concrete piles at least partially coincide. The first extension part of one protrusion is embedded in the groove of the other protrusion. The mutual limiting of the tenon-and-mortise structure formed by the positions between the pair of first extension parts and between the first extension part and the second extension part can ensure the stability of the connection between the adjacent precast concrete piles.

Description

Technical Field

[0001] This invention relates to the field of revetment structure technology, and in particular to a precast concrete pile and a revetment structure using the same. Background Technology

[0002] Riverbank protection structures are used in riverbank protection projects to provide effective protection for the riverbanks, while also having a certain aesthetic effect. Riverbank protection structures come in different forms and are made of different materials, such as concrete piles, imitation wood piles, and steel sheet piles. Among them, concrete piles include different structural forms such as piles with a central cavity formed by centrifugation and sheet piles formed by casting.

[0003] In the application of existing revetment structures, the connection between concrete piles also takes many forms, such as... Figure 1 The overlapping pattern shown, and Figure 2 As shown in the diagram, when piles are connected by lap splicing, the overall integrity and strength of the splice joint (lap position) are poor, the waterproof sealing performance is weak, and the mutual restraint function is limited. When piles are connected by plug splicing, although there is a better restraint function, the connection structure is relatively weak due to the size limitation, or it is impossible to add reinforcement, resulting in low strength and easy damage of the components. Moreover, the structural components that realize mutual plugging in this type of connection (such as grooves and protrusions) have different structural forms, which are more suitable for casting and not suitable for centrifugal molding. Summary of the Invention

[0004] The purpose of this invention is to provide a precast concrete pile and a revetment structure using the same. Adjacent precast concrete piles are connected by their respective protrusions. A first extension of one protrusion is embedded in a groove of another protrusion. The positions of adjacent pairs of first extensions and the positions of the first extensions and the second extensions can form a mutual restraint structure similar to a tenon and mortise joint, which can ensure the stability of the connection between adjacent precast concrete piles.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a precast concrete pile, comprising:

[0006] A precast concrete pile, wherein the precast concrete pile is centrifugally formed, the precast concrete pile comprising:

[0007] The pile body has a central cavity formed by centrifugation.

[0008] A pair of protrusions are respectively formed on both sides of the pile body and are centrally symmetrical about the center line of the pile body. Each protrusion includes a first extension and a second extension, and a groove is formed between the first extension and the second extension.

[0009] Both the first and second extensions are reinforced with main bars and stirrups. The main bars are located at the ends of the first and second extensions, and the stirrups are bent and fitted onto the main bars. One end of the stirrup, away from the main bars, extends into the pile body.

[0010] When a pair of precast concrete piles are connected, in an adjacent pair of protrusions: a first extension of one protrusion is embedded in a groove of the other protrusion, the orthographic projections of the pair of first extensions in a plane perpendicular to the line of the precast concrete piles' extension direction at least partially overlap, and the orthographic projections of the first extension of one protrusion and the second extension of the other protrusion in a plane passing through the line of the precast concrete piles' extension direction and perpendicular to the horizontal plane at least partially overlap.

[0011] As a further optimization, the first extension in one of the protrusions extends toward the soil-facing side, and the first extension in the other protrusion extends toward the water-facing side.

[0012] As a further optimization, the first extension includes a first connecting section connected to the pile body and a first front end section formed on the first connecting section, the second extension includes a second connecting section connected to the pile body and a second front end section formed on the second connecting section, the first front end section and the second front end section are provided with the main reinforcement, and the groove is formed on the side of the first connecting section and the second connecting section close to each other.

[0013] As a further optimization, the horizontal cross-section of the portion of the first front end segment protruding from the first connecting segment and the horizontal cross-section of the portion of the second front end segment protruding from the second connecting segment are both arc-shaped structures; the horizontal cross-section of the groove is an arc-shaped structure.

[0014] As a further optimization, the horizontal cross-section of the portion of the first front end segment protruding from the first connecting segment and the horizontal cross-section of the portion of the second front end segment protruding from the second connecting segment are both arc-shaped structures; the horizontal cross-section of the groove is an arc-shaped structure.

[0015] As a further optimization, the first front end segment and the second front end segment are tangent to the groove, and the groove is tangent to the pile body; the horizontal cross-section of the portion of the first front end segment protruding from the first connecting segment, the horizontal cross-section of the portion of the second front end segment protruding from the second connecting segment, and the horizontal cross-section of the groove are all arc-shaped structures less than or equal to a semicircle.

[0016] As a further optimization, the side of the first connecting segment away from the groove is tangent to the first front end segment, and the tangents of the two are parallel to the tangents of the first front end segment and the groove.

[0017] As a further optimization, the main reinforcement is located at the center of the first front end segment and the second front end segment; the diameter of the main reinforcement is d1, the diameter of the stirrup is d2, 1mm≤d1≤10mm, 1mm≤d2≤10mm, and d2≤d1; the radius of the first front end segment and the second front end segment is R1, the radius of the groove is R2, 10mm≤(2R1-d1-2d2)≤80mm, 10mm≤(R2-R1)30mm.

[0018] As a further optimization, when a pair of the precast concrete piles are connected, a non-linear gap or connection surface is formed between adjacent pairs of the protrusions.

[0019] As a further optimization, the gap or connection surface is S-shaped or wavy.

[0020] As a further optimization, the outer contour of the horizontal cross-section of the pile body is circular, elliptical, or polygonal.

[0021] As a further optimization, the outer contour of the horizontal cross-section of the pile body is a regular polygon.

[0022] As a further optimization, in a pair of protrusions: the line connecting the centroids of a pair of first extensions passes through the centroid of the pile body, and the line connecting the centroids of a pair of second extensions passes through the centroid of the pile body.

[0023] The present invention also provides a revetment structure comprising the aforementioned precast concrete piles.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. Adjacent precast concrete piles are connected by their respective protrusions. The first extension of one protrusion is embedded in the groove of another protrusion. The positions between adjacent pairs of first extensions and between the first extensions and the second extensions can form a mutual restraint structure similar to a tenon and mortise, which can ensure the stability of the connection between adjacent precast concrete piles.

[0026] 2. In one specific embodiment, the arc-shaped structure of the first extension, the second extension, and the groove enables the protrusion to have an arc-shaped structure. After a pair of protrusions are connected to each other, they can form a multi-directional flexible limit by means of their respective arc-shaped structures. The multi-directional interlocking design can distribute the load to adjacent components, which can ensure the long-term stability of the revetment structure under complex loads. In a more detailed specific embodiment based on this, by establishing the correlation between the diameter of the main reinforcement and the stirrups and the key geometric dimensions in the horizontal section of the precast concrete pile, the optimal mechanical performance and overall stability effect can be achieved.

[0027] 3. The fit between adjacent protrusions can create a non-linear gap between adjacent precast concrete piles, such as an S-shaped or wavy gap, which can effectively prevent water erosion and soil loss. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a concrete pile and revetment structure based on existing technology.

[0029] Figure 2 This is a schematic diagram of another type of concrete pile and revetment structure in the prior art.

[0030] Figure 3 This is a structural diagram of the precast concrete pile of the present invention.

[0031] Figure 4 This is a top view of the precast concrete pile of the present invention.

[0032] Figure 5 This is a schematic diagram of the reinforcing material on the protrusion of the present invention.

[0033] Figure 6 This is a schematic diagram of a pair of precast concrete piles connected according to the present invention.

[0034] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0035] Figure 8 This is a derivation diagram of the horizontal cross-sectional shape of the first front end segment, the groove, and the second front end segment in the protrusion of the present invention.

[0036] Figure 9 This is a schematic diagram of the horizontal cross-sectional shape of the first front end segment, the groove, and the second front end segment in the protrusion of the present invention.

[0037] Figure 10 This is a schematic diagram showing a gap between a pair of precast concrete piles connected together according to the present invention.

[0038] Figure 11 This is a top view of another embodiment of the precast concrete pile of the present invention.

[0039] Figure 12 This is a top view of yet another embodiment of the precast concrete pile of the present invention.

[0040] Figure 13 This is a top view of another embodiment of the precast concrete pile of the present invention.

[0041] Figure 14 This is a schematic diagram of the demolding process of the precast concrete pile formed by centrifugation according to the present invention. Detailed Implementation

[0042] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0043] like Figures 3 to 6 As shown, a precast concrete pile, formed by centrifugal molding, includes a pile body 10 and a protrusion 20. The pile body has a centrifugally formed central cavity. The protrusion 20 is integrally formed with the pile body 10. A pair of protrusions 20 are respectively formed on both sides of the pile body 10 and are centrally symmetrical about the center line of the pile body 10. The protrusion 20 includes a first extension 21 and a second extension 22, and a groove 23 is formed between the first extension 21 and the second extension 22.

[0044] Both the first extension 21 and the second extension 22 are provided with reinforcement 24, which includes main reinforcement 241 and stirrups 242. The main reinforcement 241 is located at the end of the first extension 21 and the second extension 22. The stirrups 242 are bent and fitted onto and abut against the main reinforcement 241. The end of the stirrups 242 away from the main reinforcement 241 extends into the pile body 10.

[0045] The protrusions 20 are configured such that when a pair of precast concrete piles are connected, in an adjacent pair of protrusions 20: a first extension 21 in one protrusion 20 is embedded in a groove 23 in the other protrusion 20, and the orthographic projections of the pair of first extensions 21 in a plane perpendicular to the line of the precast concrete piles' extension direction at least partially overlap; and the orthographic projections of the first extension 21 in one protrusion 20 and the second extension 22 in the other protrusion 20 in a plane passing through the line of the precast concrete piles' extension direction and perpendicular to the horizontal plane at least partially overlap.

[0046] In this invention, the precast concrete piles are provided with protrusions 20 for connecting with each other. When multiple precast concrete piles are connected to form a revetment structure, they are connected by the interaction between a pair of adjacent protrusions 20 on adjacent precast concrete piles, and are positioned by limiting the relative positions of the first extension 21 and the second extension 22. The installation of precast concrete is as follows: First, a precast concrete pile is installed from top to bottom. After the first precast concrete pile is installed in place, the position of its protrusion 20 (first extension 21, second extension 22 and groove 23) is fixed as a reference. Then, another precast concrete pile is installed from top to bottom. The installation process is to match the first extension 21 and groove 23 on the other precast concrete pile with the groove 23 and first extension 21 on the already positioned precast concrete pile in terms of vertical position, and then install the other precast concrete pile from top to bottom. This allows the other precast concrete pile to be installed in conjunction with the already positioned precast concrete pile. During the installation process, the first extension 21 and groove 23 of the adjacent precast concrete piles play a guiding and positioning role, which can ensure better fit and smaller error between the adjacent precast concrete piles after installation. After a pair of adjacent precast concrete piles are installed, the protrusions 20 on each pile have the following positional relationship: the projections of a pair of first extensions 21 of the protrusions 20 along the precast concrete pile arrangement direction at least partially overlap; the projection of the first extension 21 of one protrusion 20 perpendicular to the precast concrete pile arrangement direction at least partially overlaps with the projection of the second extension 22 of the other protrusion 20 perpendicular to the precast concrete pile arrangement direction. That is, the pair of first extensions 21 interfere with each other during relative displacement along the precast concrete pile arrangement direction, preventing the pair of precast concrete piles in the revetment structure from separating from each other in the left-right direction, and preventing them from separating in the right-right direction. When the two sides of the first extension 21 interact with the first extension 21 and the second extension 22 of the other protrusion 20 during relative displacement, a pair of precast concrete piles in the revetment structure cannot detach from each other in the front-back direction. Therefore, the connection between the pair of precast concrete piles is achieved by forming a mortise and tenon joint between the pair of protrusions 20, which can ensure the reliability of the connection between them. Moreover, the physical fitting of the tenon (i.e., the first extension 21) and the mortise (i.e., the groove 23) can firmly fix the adjacent pair of precast concrete piles, preventing the displacement of a single pile due to uneven scour stress. This fundamentally improves the overall scour resistance stability of the revetment structure and reduces the chain risk of "local scour → overall instability".Furthermore, since the first extension 21 and the second extension 22 form a structure protruding from the pile body 10, in order to ensure the structural stability of the two, reinforcement 24 can be provided in the two. The main reinforcement 241 in the reinforcement can enhance the structural strength of the ends of the first extension 21 and the second extension 22, and the "binding" of the main reinforcement 241 by the stirrup 242 can improve the connection strength between the first extension 21 and the second extension 22 and the pile body.

[0047] In this invention, the precast concrete pile is prepared by centrifugal molding. To ensure the balance of the mold during the centrifugal molding process, a pair of cavities (located on the upper and lower molds respectively) are provided in a centrally symmetrical manner along the central axis of the mold to form a pair of protrusions 20. Preferably, after centrifugal molding, the line connecting the centroids of the pair of first extensions 21 on the precast concrete pile passes through the centroid of the pile body 10, and the line connecting the centroids of the pair of second extensions 22 passes through the centroid of the pile body 10. This can ensure the balance during the centrifugal molding process and prevent the mold from jumping due to the shift of the center of gravity during the centrifugal molding process, so as to ensure product quality and mold safety.

[0048] Multiple precast concrete piles are arranged sequentially along the riverbank to form a revetment structure. The centrifugally formed precast concrete piles, with their central cavity, create a large horizontal cross-section. This large cross-section contributes to excellent structural strength, ensuring the stability of the revetment structure itself and its interaction with the riverbank. Furthermore, compared to cast-in-place precast concrete piles, centrifugally formed piles, due to their central cavity, are more material-efficient, lighter, and easier to install during construction. Additionally, adjacent pile bodies 10 are connected by a pair of protrusions 20, forming a connection structure that protrudes from the pile bodies 10. This allows for a unique design compared to conventional simple concrete pile-to-pile connections, and it is easier to manufacture and install compared to conventional sheet pile connections.

[0049] Preferably, in the two protrusions 20 of a precast concrete pile, the first extension 21 of one protrusion 20 extends towards the soil-facing side 300a, and the first extension 21 of the other protrusion 20 extends towards the water-facing side 300b. The inclined arrangement of the first extension 21 facilitates mutual interference between the pair of first extensions 21 and between the first extension 21 and the second extension 22 during relative displacement. Correspondingly, the groove 23 can also be inclined, with its extension direction parallel to the extension direction of the first extension 21, facilitating the insertion of the inclined first extension 21 within it.

[0050] like Figure 5As shown, for the specific structure of the first extension 21 and the second extension 22, the first extension 21 includes a first connecting section 211 connected to the pile body 10 and a first front end section 212 formed on the first connecting section 211. The second extension 22 includes a second connecting section 221 connected to the pile body 10 and a second front end section 222 formed on the second connecting section 221. The first front end section 212 and the second front end section 222 are respectively provided with main reinforcement 241. The first connecting section 211 and the second connecting section 221 form a groove 23 on the side close to each other. That is, the positional relationship between the first front end section 212, the second front end section 222 and the groove 23 enables a pair of adjacent protrusions 20 to interact with each other when they are in relative displacement. Specifically, the horizontal cross-section of the portion of the first front end section 212 protruding from the first connecting section 211 and the horizontal cross-section of the portion of the second front end section 222 protruding from the second connecting section 221 are both arc-shaped structures. The horizontal cross-section of the groove 23 is also arc-shaped. Preferably, the first front end section 212 and the second front end section 222 are connected to the two ends of the groove 23 respectively. Through the above arrangement, multiple arc-shaped structures can be formed. The smooth transition of the outer wall of the protrusion 20 on the precast concrete pile can be achieved through the cooperation of the arc-shaped structures. This design has a better impact resistance effect for revetment structures, especially for waterway revetment structures. Because waterway revetment structures need to withstand multi-directional composite loads, such as the impact force of ships docking / intersecting in addition to water flow scouring, uneven settlement of the foundation caused by waterway dredging, and vertical stress caused by water level changes, traditional revetment structures are prone to local stress concentration due to their strong connection rigidity (such as rigid welding and integral casting), which can lead to cracks or component breakage. However, in this application, the adjacent protrusions 20 on a pair of precast concrete piles can form a "flexible limit" by means of corresponding arc surface structures or gaps formed between arc surface structures, which can generate a certain degree of relative displacement or relative deflection. This characteristic is just right to meet the requirements of various concrete piles in waterways to withstand multi-directional composite loads. Based on the left-right and front-back direction limit, its multi-directional interlocking design can disperse concentrated loads (such as ship impact force) to adjacent components, and absorb energy through small deformations on the arc surface structure to avoid local damage, ensuring the long-term stability of the revetment under complex loads.

[0051] Furthermore, the horizontal cross-section of the portion of the first front end segment 212 protruding from the first connecting segment 211 and the horizontal cross-section of the portion of the second front end segment 222 protruding from the second connecting segment 221 are both arc-shaped structures, and the horizontal cross-section of the groove 23 is an arc-shaped structure. Preferably, the first front end segment 212 and the second front end segment 222 are connected to the two ends of the groove 23 respectively. That is, the first front end segment 212, the second front end segment 222 and the groove 23 all have arc-shaped surface structures. The setting of multiple arc-shaped surface structures realizes the smooth transition of the outer wall surface of the protrusion 20, which not only ensures that the revetment structure achieves the above-mentioned "flexible limiting" to ensure better impact resistance, but also has a more regular shape, which is more conducive to the cooperation between the first front end segment 212 and the groove 23. It should be noted that the first front end segment 212, the second front end segment 222, and the groove 23 are designed as arc-shaped structures because reinforcement 24 needs to be installed in the first extension 21 and the second extension 22. Due to the presence of the main reinforcement 241 and the stirrups 242, the concrete at the connection point needs to have a certain thickness to ensure that the concrete wraps around and protects the connection point. The method that minimizes the amount of concrete used while still achieving the desired wrapping effect is to form a circular structure. This circular structure is then connected directly or through an auxiliary structure (i.e., the first connecting segment and the second connecting segment) to the pile body 10, thus forming the arc-shaped structures on the first extension 21 and the second extension 22, which in turn form the first front end segment 212 and the second front end segment 22. The arc surface structure of segment 222; moreover, in order to achieve interlocking between adjacent pairs of protrusions 20 on adjacent pairs of precast concrete piles, along the arrangement direction of the precast concrete piles, the arc surface structures of a pair of first front end segments 212 on a pair of first extensions 21 of a pair of protrusions 20 need to interfere with each other. That is, the first front end segment 212 and the second front end segment 222 on the protrusion 20 protrude from the pile body 10 to different degrees through the first connecting segment 211 and the second connecting segment 212, so that one first front end segment 212 is embedded in the groove 23 and interferes with the other first front end segment 212. Based on the above results, this is achieved by tangential interference in the structure of the first front end segment 212, the groove 23 and the second front end segment 222, specifically as follows. Figure 7As shown, the first tangent 21a on the first extension 21 (first front end section 212) that is parallel to the arrangement direction of the precast concrete piles interferes with the first extension 21 (first front end section) on another precast concrete pile, and the second tangent 21b on the first extension 21 (first front end section 212) that is perpendicular to the arrangement direction of the precast concrete piles interferes with the second extension 22 (second front end section 222) on another precast concrete pile, thereby achieving mutual restraint of a pair of precast concrete piles in the left-right and front-back directions. After further optimization, the first front end segment 212 and the second front end segment 222 are connected to and tangent to both ends of the groove 23, and the groove 23 is tangent to the pile body 10, which can reduce the amount of concrete used while achieving interlocking. In addition, the horizontal cross-section of the part of the first front end segment 212 protruding from the first connecting segment 211, the horizontal cross-section of the part of the second front end segment 222 protruding from the second connecting segment 221, and the horizontal cross-section of the groove 23 are all arc-shaped structures less than or equal to semicircles. That is, the part of the first front end segment 212 protruding from the first connecting segment 211 and the part of the second front end segment 222 protruding from the second connecting segment 221 do not have expansion parts, and no internal expansion structure is formed inside the groove 23, which facilitates the demolding of the precast concrete pile after centrifugal molding.

[0052] Furthermore, the side of the first connecting segment 211 away from the groove 23 is tangent to the first front end segment 212, and the tangents of the two are parallel to the tangents of the first front end segment 212 and the groove 23. That is, on the first connecting segment 211, the side wall away from the groove 23 and the end close to the pile body 10 does not turn inward, that is, it does not excessively shift towards the groove 23 side, which can avoid forming a demolding interference angle and causing the precast concrete pile to be unable to be demolded after centrifugal molding.

[0053] Preferably, when the first front end segment 212, the groove 23, and the second front end segment 222 are tangent, the main reinforcement 241 is located at the center of the first front end segment 212 and the second front end segment 222. Further, the diameter of the main reinforcement 241 is d1, the diameter of the stirrup 242 is d2, 1mm≤d1≤10mm, 1mm≤d2≤10mm, and d2≤d1, the radius of the first front end segment 212 and the second front end segment 222 is R1, the radius of the groove 23 is R2, 10mm≤(2R1-d1-2d2)≤80mm, and 10mm≤(R2-R1)30mm. If d1=7mm and d2=4mm, then the diameter of the first front end segment 212 and the second front end segment 222 is preferably 2R1=85mm. In order to enable the smooth assembly of adjacent precast concrete piles, there should be a tolerance space between the first front end segment 212 and the groove 23, and the radius of the groove 23 and the first front end segment 212 should have a distance of (R2-R1)=20mm. Therefore, the diameter of the groove 23 is 2R2=125mm.

[0054] Based on the aforementioned structure of the first front end segment 212, the groove 23, and the second front end segment 222, their mutual tangential relationships, and the numerical data of each component, in order to deduce the required structure of the protrusion 20, the arcs formed by the horizontal cross-section of the portion of the first front end segment 212 protruding from the first connecting segment 211, the horizontal cross-section of the portion of the second front end segment 222 protruding from the second connecting segment 221, and the horizontal cross-section of the groove 23 are respectively supplemented into complete circles to deduce their relative positional relationships. The positional relationships between the first front end segment 212, the groove 23, and the second front end segment 222 on one protrusion 20 and the first front end segment 212 on another protrusion 20 are as follows: Figure 8 As shown, the spacing between adjacent red and blue lines represents the tolerance space between the first front segment of one protrusion and the groove of another protrusion. To achieve mutual restraint between the first and second front segments of one protrusion and the first front segment of another protrusion, the first and second front segments should extend beyond the red lines, reaching the purple lines. Thus, the horizontal cross-section of the portion of the first front segment protruding from the first connecting segment, the horizontal cross-section of the groove, and the horizontal cross-section of the portion of the second front segment protruding from the second connecting segment are connected to form the following... Figure 9 The structure shown connects the structure to the horizontal section of the pile body 10 via the first connecting section 211 and the second connecting end 221, and the horizontal section of the groove 23 is tangent to the horizontal section of the pile body 10, thus forming a protrusion 20 on one side of the pile body 10. Another protrusion 20 can be formed on the other side of the pile body 10 through the central symmetry of the protrusion 20 about the central axis of the pile body 10.

[0055] like Figure 10 As shown, when a pair of precast concrete piles are connected, the first extension of one of the protrusions 20 in an adjacent pair of protrusions 20 is embedded in the groove of the other protrusion, forming a gap or connecting line between the pair of protrusions. The gap or connecting line is non-linear. The existence of the non-linear gap 200 allows for a longer and more curved connecting path between the soil-facing side 300a and the water-facing side 300b, forming a longer waterway. The water flow on the water-facing side 300b is less likely to pass through the gap 200 and erode the soil on the riverbank. The soil and water on the soil-facing side 300a will gradually accumulate after entering the gap 200, thus forming a blocking effect and preventing soil erosion. Preferably, the gap is S-shaped or wavy.

[0056] The outer contour of the horizontal cross-section of the pile body 10 is circular, elliptical, or polygonal, such as... Figures 11 to 12As shown, to achieve stackability of precast concrete piles during storage and transportation, the outer contour of the horizontal cross-section of the pile body 10 is preferably a polygonal structure, such as a regular quadrilateral, regular hexagon, or regular octagon. Its relatively arranged planar structure allows for stacking of precast concrete piles after they are laid flat, and the planar structure can have a certain width to ensure stacking stability. Preferably, the outer contour of the horizontal cross-section of the pile body 10 is a regular octagonal structure. Since a circular cross-section is the most material-efficient when the wall thickness is constant, and a regular octagon is closer to a circle, it achieves both material saving and convenient stacking. Furthermore, to ensure a good demolding effect and avoid interference between the corresponding parts or structures of the precast concrete pile and the mold cavity during demolding, a transition slope 100 is provided between the pile body 10 and the protrusion 20 to facilitate demolding of the precast concrete pile. The presence of the transition slope 100 can prevent the formation of an inclined surface that interferes with the demolding process between the protrusion 20 and the pile body 10. For example... Figure 13 As shown, based on the fact that the side of the first connecting segment 211 away from the groove 23 is tangent to the first front end segment 212, and the tangents of the two are parallel to the tangents of the first front end segment 212 and the groove 23, the sidewall of the first connecting segment 211 away from the groove 23 can extend to the sidewall of the pile body 10 near its soil-facing side 300a or water-facing side 300b, ensuring its demolding effect. Its demolding state is as follows: Figure 14 As shown.

[0057] The present invention also provides a revetment structure, which includes the aforementioned precast concrete piles, wherein multiple precast concrete piles are connected in sequence, such as... Figure 6 The multiple precast concrete piles, which are centrifugally formed, are connected in sequence.

[0058] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A precast concrete pile, wherein the precast concrete pile is centrifugally formed, characterized in that, The precast concrete piles include: The pile body has a central cavity formed by centrifugation. A pair of protrusions are respectively formed on both sides of the pile body and are centrally symmetrical about the center line of the pile body. Each protrusion includes a first extension and a second extension, and a groove is formed between the first extension and the second extension. Both the first and second extensions are reinforced with main bars and stirrups. The main bars are located at the ends of the first and second extensions, and the stirrups are bent and fitted onto the main bars. One end of the stirrup, away from the main bars, extends into the pile body. When a pair of precast concrete piles are connected, in an adjacent pair of protrusions: a first extension of one protrusion is embedded in a groove of the other protrusion, the orthographic projections of the pair of first extensions in a plane perpendicular to the line of the precast concrete piles' extension direction at least partially overlap, and the orthographic projections of the first extension of one protrusion and the second extension of the other protrusion in a plane passing through the line of the precast concrete piles' extension direction and perpendicular to the horizontal plane at least partially overlap.

2. The precast concrete pile according to claim 1, characterized in that, The first extension in one of the protrusions extends toward the soil-facing side, and the first extension in the other protrusion extends toward the water-facing side.

3. The precast concrete pile according to claim 1, characterized in that, The first extension includes a first connecting section connected to the pile body and a first front end section formed on the first connecting section. The second extension includes a second connecting section connected to the pile body and a second front end section formed on the second connecting section. The main reinforcement is provided in the first front end section and the second front end section. The groove is formed on the side of the first connecting section and the second connecting section that is close to each other.

4. The precast concrete pile according to claim 3, characterized in that, The horizontal cross-section of the portion of the first front end segment that protrudes from the first connecting segment and the horizontal cross-section of the portion of the second front end segment that protrudes from the second connecting segment are both arc-shaped structures; The horizontal cross-section of the groove is an arc-shaped structure.

5. The precast concrete pile according to claim 4, characterized in that, The horizontal cross-section of the portion of the first front end segment protruding from the first connecting segment and the horizontal cross-section of the portion of the second front end segment protruding from the second connecting segment are both arc-shaped structures; the horizontal cross-section of the groove is an arc-shaped structure.

6. The precast concrete pile according to claim 5, characterized in that, The first front end segment and the second front end segment are tangent to the groove, and the groove is tangent to the pile body; the horizontal cross-section of the portion of the first front end segment protruding from the first connecting segment, the horizontal cross-section of the portion of the second front end segment protruding from the second connecting segment, and the horizontal cross-section of the groove are all arc-shaped structures less than or equal to a semicircle.

7. The precast concrete pile according to claim 6, characterized in that, The side of the first connecting segment away from the groove is tangent to the first front end segment, and the tangents of the two segments are parallel to the tangents of the first front end segment and the groove.

8. The precast concrete pile according to claim 6, characterized in that, The main reinforcement is located at the center of the first front end segment and the second front end segment; the diameter of the main reinforcement is d1, the diameter of the stirrup is d2, 1mm≤d1≤10mm, 1mm≤d2≤10mm, and d2≤d1; the radius of the first front end segment and the second front end segment is R1, the radius of the groove is R2, 10mm≤(2R1-d1-2d2)≤80mm, 10mm≤(R2-R1) 30mm.

9. The precast concrete pile according to claim 1, characterized in that, When a pair of the precast concrete piles are connected, a non-linear gap or connection surface is formed between adjacent pairs of the protrusions.

10. The precast concrete pile according to claim 9, characterized in that, The gap or connecting surface is S-shaped or wavy.

11. The precast concrete pile according to claim 1, characterized in that, The outer contour of the horizontal cross-section of the pile body is circular, elliptical, or polygonal.

12. The precast concrete pile according to claim 11, characterized in that, The outer contour of the horizontal cross-section of the pile body is a regular polygon.

13. The precast concrete pile according to claim 1, characterized in that, In a pair of protrusions: the line connecting the centroids of the pair of first extensions passes through the centroid of the pile body, and the line connecting the centroids of the pair of second extensions passes through the centroid of the pile body.

14. A revetment structure, characterized in that, Including the precast concrete piles as described in any one of claims 1 to 13.

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