A reinforced joint for the end of a bend-resistant pipe pile and a pipe pile construction method

Abstract

The application relates to the technical field of building and traffic engineering, and particularly discloses an anti-bending pipe pile end zone reinforcing joint and a pipe pile construction method. The anti-bending pipe pile end zone reinforcing joint comprises a male joint and a female joint respectively installed on the first pipe pile end and the second pipe pile end. The male joint comprises a first pile sleeve hoop, a first end plate, a plurality of first reinforcing ribs and a plurality of shear-resistant plates matched with the first reinforcing ribs in number. The female joint comprises a second pile sleeve hoop, a second end plate, a plurality of second reinforcing ribs and a plurality of anchoring pieces matched with the second reinforcing ribs in number. The anti-bending pipe pile end zone reinforcing joint adopts a socket type connection mode. After the female joint and the male joint are butted and inserted, the outer circle of the end plate can be fully welded. The shear resistance and the bending resistance of the pipe pile end zone reinforcing zone and the joint are greatly improved. The problems of concrete separation and crushing in the end zone are solved. The problem of the end plate being deformed into an "O" shape is completely eliminated. The connection of the pipe pile end zone is more reliable.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of building and traffic engineering, and particularly relates to a reinforced joint of a bending-resistant pipe pile end and a pipe pile construction method. BACKGROUND

[0002] Prestressed concrete pipe piles are widely used in building engineering, traffic engineering and port wharf. In recent years, with the progress of construction equipment and construction technology, the application range of large-diameter pipe piles is becoming wider and wider. Especially in deep foundation pit support engineering, slope retaining pile, bridge pile foundation, port wharf and the like, the bending resistance is required to be high, and the use amount of pipe piles with a diameter of 1.0m-1.2m is continuously increasing. Large-diameter pipe piles have higher bending resistance, but research shows that no matter whether a welded joint or a mechanical connecting joint is used, the pipe pile joint is the weakest position of the pipe pile bending resistance. In general, the ultimate bending resistance of the joint is only 60%-85% of the strength of the pile body, thereby causing the waste of the strength of the pile body. Therefore, various patent technologies for improving the bending resistance of the pipe pile joint are born.

[0003] In most cases, during the test loading process of the pipe pile anti-bending joint, although the concrete near the outside of the pile sleeve is cracked on the tensile side, the actual situation is that the concrete inside the pile sleeve at both ends of the joint is first separated from the end plate and the pile sleeve, and then the concrete is crushed, losing the bearing capacity. Most existing patents focus on the reinforcement of the end plate weld and the additional binding steel plate outside the weld, but experiments have found that the end plate weld is rarely broken, and the binding steel plate does not significantly improve the bending load capacity of the joint. This is because, regardless of whether the binding steel plate is added or not, when the load reaches a certain magnitude, the end plate begins to deform and form a drum shape ("O" shape). In addition to the outside weld, the distance between the other positions is getting larger and larger, and the gap between the two end plates changes from a flat contact to an open drum-shaped horn. Many patented mechanical joints rely on springs and rack engagement, and are more suitable for pile connection for anti-pressure piles. Mechanical joints are not suitable for anti-bending pipe pile joints, and are more suitable for vertical anti-pressure. Moreover, the cross-section of the connecting piece is only a small part of the area of the pipe pile section, so the bending load capacity is naturally low. For example, "PRC pipe pile anti-shear joint" (Utility Model: 202121859781.1), N shear pins improve the bending and shear stiffness of the pipe pile sleeve area to a lesser extent, the diameter of the shear pins is small, the contact area with the concrete is small, and the ability to prevent the concrete from separating from the end plate is poor. For example, "PRC pipe pile for deep foundation pit support and pile connection method thereof" (Invention: 201911229563.7), the rigid sleeve is not anchored with the pile sleeve and the end plate, and each bears force independently, which limits the overall bending and shear capacity of the joint. For example, "Joint structure for increasing the strength of a prestressed pipe pile joint" (Utility Model: 201920096749.9), although the connection is convenient and the bending and shear capacity is strong, the disadvantage is poor tensile capacity, the connection section uses a full steel structure, the cost of the joint is high, and it is not easy to accept in engineering and is not convenient to use and promote.

[0004] On the other hand, there are many pipe pile joint methods, most of which use mechanical connection. The principle is to use connecting pieces instead of welding between the two end plates at the joint, reducing the working hours and labor intensity of workers. Fast anchoring joint schemes such as "Pile mechanical joint with one or more improved slotted locking protrusions" (Utility Model: 202220877860.3), "High-strength pipe pile joint device" (Utility Model: 202220336854.7), "Pipe pile internal connection mechanical joint and connection method" (Invention: 202110121071.7), "Expanding and occlusal mechanical connection joint" (Invention: 201610683025.5), etc., all have the common shortcomings of poor bending and shear capacity of the pipe pile end area and the joint, especially weak tensile capacity of the mechanical joint, and high material consumption at the joint.

[0005] Therefore, the person skilled in the art urgently needs to find a new technical solution to solve the above problems. SUMMARY

[0006] In view of the technical problems in the prior art, the present application provides an anti-bending pipe pile end head area reinforcing joint and a pipe pile construction method.

[0007] The present application comprises an anti-bending pipe pile end head area reinforcing joint, comprising a male joint and a female joint respectively mounted on the first pipe pile end head and the second pipe pile end head, wherein,

[0008] The male joint comprises a first pile sleeve, a first end plate, a plurality of first reinforcing ribs, and a plurality of shear plates matching the number of the first reinforcing ribs; the first pile sleeve is sleeved on the first pipe pile end head; the first end plate is located on the end face of the first pipe pile end head, and the edge of the first end plate is integrally connected with the first pile sleeve; the plurality of first reinforcing ribs are distributed in a circumferential direction along the inner wall of the first pile sleeve, and the first long edge of the first reinforcing rib is fixed on the inner wall of the first pile sleeve, and the first short edge of the first reinforcing rib is fixed on the first end plate; one part of the shear plate is fixed on the second long edge of the first reinforcing rib, and the other part protrudes outward through the first end plate;

[0009] The female joint comprises a second pile sleeve, a second end plate, a plurality of second reinforcing ribs, and a plurality of anchoring pieces matching the number of the second reinforcing ribs; the second pile sleeve is sleeved on the second pipe pile end head; the second end plate is located on the end face of the second pipe pile end head, and the edge of the second end plate is integrally connected with the second pile sleeve; the plurality of second reinforcing ribs are distributed in a circumferential direction along the inner wall of the second pile sleeve, and the first long edge of the second reinforcing rib is fixed on the inner wall of the second pile sleeve, and the first short edge of the second reinforcing rib is fixed on the second end plate, and at least one anchoring piece is fixed on the second long edge of the second reinforcing rib;

[0010] When the male joint and the female joint are connected, the other part of the shear plate penetrates from the second end plate and is clamped in the anchoring piece; the first end plate and the second end plate are fixedly connected.

[0011] Further, the second short edges of the first reinforcing ribs and the second reinforcing ribs are of a stepped type, and the length of the first long edges of the first reinforcing ribs and the second reinforcing ribs is greater than the length of the second long edges.

[0012] Further, the connection between the first long edge and the second short edge of the first reinforcing rib is flush with the edge of the first pile sleeve; the connection between the first long edge and the second short edge of the second reinforcing rib is flush with the edge of the second pile sleeve.

[0013] Further, when the male joint and the female joint are connected, the two ends of the shear plate are flush with the connections between the second long edges and the second short edges of the first reinforcing rib and the second reinforcing rib, respectively.

[0014] Further, the side face fixed with the first reinforcing rib on the shear plate and the side face away from the first reinforcing rib are both arc faces, and the centers of the two arc faces are close to the axis of the first pile sleeve.

[0015] Further, in the cross section of the convex joint, the first pile sleeve, the first reinforcing rib and the shear plate are connected in an I-shaped structure.

[0016] Further, a plurality of upsetting head holes are formed in the first end plate and the second end plate and match a plurality of prestressed steel bars distributed in the first pipe pile end head and the second pipe pile end head, and the upsetting heads of the prestressed steel bars are anchored in the upsetting head holes.

[0017] Further, a spiral stirrup is further included, and the spiral stirrup is wound outside the prestressed steel bar.

[0018] Further, a welding chamfer groove is arranged at the connection of the first pile sleeve, the second pile sleeve, the first end plate and the second end plate.

[0019] The application further provides a pipe pile construction method for the bending-resistant pipe pile end head area reinforced joint, and the method comprises the following steps:

[0020] S1: centering the first pipe pile end head and the second pipe pile end head provided with the convex joint and the concave joint, and inserting the shear plate of the convex joint into the anchoring member of the concave joint;

[0021] S2: after the first end plate and the second end plate are attached, welding the connection of the first pile sleeve, the second pile sleeve, the first end plate and the second end plate.

[0022] The bending-resistant pipe pile end head area reinforced joint and the pipe pile construction method have the following beneficial effects:

[0023] (1) In the convex joint and the concave joint, the first reinforcing rib and the second reinforcing rib are respectively distributed along the inner walls of the first pile sleeve and the second pile sleeve in a circumferential direction, and the arrangement direction is consistent with the pile axis, and the first reinforcing rib and the second reinforcing rib are respectively fixedly connected with the first end plate and the second end plate, thereby forming a joint structure with greater overall rigidity, and increasing the contact area between the inner cavity of the joint and the concrete, avoiding the separation of the concrete in the pile sleeve from the end plate and the sleeve, solving the problems of concrete separation and crushing in the end head area, completely eliminating the problem of "O" deformation of the end plate, and making the connection of the pipe pile end head area more reliable.

[0024] (2) The convex joint and the concave joint of the application adopt a socket connection mode, after the concave-convex joint is inserted and connected, the outer circle of the end plate is fully welded, the shear plate is additionally arranged, and the first reinforcing rib and the anchor are anchored, the bending moment and the shear force are borne by the weld of the outer circle of the end plate and the shear plate, the shear resistance and the bending resistance of the end head reinforcing area and the joint of the pipe pile are greatly improved, and the construction quality is easier to control. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0026] Figure 1 It is a cross-sectional structure schematic view of the reinforcing joint of the bending-resistant pipe pile end head area of the embodiment of the application.

[0027] Figure 2 It is a cross-sectional structure schematic view of the bending-resistant pipe pile end head area of the embodiment of the application. Figure 1 It is a cross-sectional structure schematic view of the bending-resistant pipe pile end head area of the embodiment of the application.

[0028] Figure 3 It is a cross-sectional structure schematic view of the bending-resistant pipe pile end head area of the embodiment of the application. Figure 1 It is a cross-sectional structure schematic view of the bending-resistant pipe pile end head area of the embodiment of the application.

[0029] Figure 4 It is a cross-sectional structure schematic view of the bending-resistant pipe pile end head area of the embodiment of the application. Figure 1 It is a cross-sectional structure schematic view of the bending-resistant pipe pile end head area of the embodiment of the application.

[0030] Figure 5 It is a cross-sectional structure schematic view of the bending-resistant pipe pile end head area of the embodiment of the application. Figure 1 It is a cross-sectional structure schematic view of the bending-resistant pipe pile end head area of the embodiment of the application.

[0031] Figure 6 It is a cross-sectional structure schematic view of the bending-resistant pipe pile end head area of the embodiment of the application. Figure 1 It is a cross-sectional structure schematic view of the bending-resistant pipe pile end head area of the embodiment of the application.

[0032] Figure 7 It is a partial cross-sectional structure schematic view of the reinforcing joint of the bending-resistant pipe pile end head area of the embodiment of the application.

[0033] Figure 8 It is a structure schematic view of the shear plate in the reinforcing joint of the bending-resistant pipe pile end head area of the embodiment of the application.

[0034] Figure 9 It is a step flow chart of the method of the pipe pile construction of the embodiment of the application.

[0035] Wherein: 10-convex joint, 11-first pile sleeve hoop, 12-first end plate, 13-first reinforcing rib, 14-shear plate, 15-header hole, 16-weld, 20-concave joint, 21-second pile sleeve hoop, 22-second end plate, 23-second reinforcing rib, 24-anchor, 25-precast recess, 30-first pipe pile end, 40-second pipe pile end, 50-prestressed steel bar, 60-helical stirrup, 70-weld chamfer groove. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application.

[0037] A bending-resistant pipe pile end zone reinforcing joint in an embodiment of the present application, as shown in the figure, comprises a convex joint 10 and a concave joint 20 respectively mounted on a first pipe pile end 30 and a second pipe pile end 40. Figures 1 to 8 The inner cavities of the convex joint 10 and the concave joint 20 in the embodiment of the present application are respectively engaged and cemented with the first pipe pile end 30 and the second pipe pile end 40 through fine stone high-strength concrete, and then the convex joint 10 and the concave joint 20 are assembled to realize the connection of the pipe pile end.

[0038] The convex joint 10 comprises a first pile sleeve hoop 11, a first end plate 12, a plurality of first reinforcing ribs 13, and a plurality of shear plates 14 matched in number with the first reinforcing ribs 13; the first pile sleeve hoop 11 is sleeved on the first pipe pile end 30; the first end plate 12 is located on the end face of the first pipe pile end 30, and the edge of the first end plate 12 is connected with the first pile sleeve hoop 11 integrally; the plurality of first reinforcing ribs 13 are distributed in a circumferential direction along the inner wall of the first pile sleeve hoop 11, and the first long side of the first reinforcing rib 13 is fixed on the inner wall of the first pile sleeve hoop 11, and the first short side of the first reinforcing rib 13 is fixed on the first end plate 12; the shear plate 14 is partially fixed on the second long side of the first reinforcing rib 13, and the other part protrudes outward through the first end plate 12;

[0039] The concave joint 20 includes a second pile sleeve 21, a second end plate 22, a plurality of second reinforcing ribs 23, and a plurality of anchors 24 matching the number of second reinforcing ribs 23; the second pile sleeve 21 is sleeved on the end 40 of the second pipe pile; the second end plate 22 is located on the end face of the end 40 of the second pipe pile, and the edge of the second end plate 22 is integrally connected with the second pile sleeve 21; the plurality of second reinforcing ribs 23 are circumferentially distributed along the inner wall of the second pile sleeve 21, and the first long side of the second reinforcing rib 23 is fixed on the inner wall of the second pile sleeve 21, the first short side of the second reinforcing rib 23 is fixed on the second end plate 22, and at least one anchor 24 is fixed on the second long side of the second reinforcing rib 23;

[0040] When the convex joint 10 and the concave joint 20 are connected, another part of the shear plate 14 passes through the second end plate 22 and is snapped into the anchor 24; the first end plate 12 and the second end plate 22 are fixedly connected.

[0041] In this embodiment of the invention, the components of the convex joint 10 and the concave joint 20 are preferably made of steel plates, and the specific dimensions are not limited in this invention. Since pipe piles are typically cylindrical, the first pile sleeve 11 and the second pile sleeve 21 are cylindrical steel sleeves. The cylindrical steel sleeve can be manufactured by spirally machining and welding steel plates with a thickness of 6mm to 10mm, with an outer diameter equal to the pipe pile diameter d, and a length of approximately 300mm to 500mm. The first end plate 12 and the second end plate 22 can be made of steel plates with a thickness of 18mm to 30mm, the first reinforcing rib 13 and the second reinforcing rib 23 can be cut from steel plates with a thickness of 10mm to 20mm, and the shear plate 14 is made of a rectangular steel plate with a thickness of 10mm to 20mm.

[0042] like Figures 1 to 4 As shown, the first reinforcing rib 13 is positioned towards the axis of the pipe pile. The number of first reinforcing ribs 13 used in this embodiment of the invention is not specifically limited, such as... Figure 2 As shown, there are a total of 8 first reinforcing ribs 13. The first long side of each first reinforcing rib 13 is fixed to the inner wall of the first pile sleeve 11, and the second long side is close to the central axis of the pipe pile. Each first reinforcing rib 13 is evenly and symmetrically distributed within the first pile sleeve 11. The connection position and number of the second reinforcing ribs 23 and the second pile sleeve 21 are consistent with those of the first reinforcing ribs 13, and will not be described in detail here. In the convex joint 10, the number of shear plates 14 corresponding to the number of first reinforcing ribs is fixed to the second long side of the first reinforcing rib 13. A portion of the shear plate 14 protrudes outward through the first end plate 12, thereby forming the structure of the "convex" joint. In the concave joint 20, the shear plate 14 inserted into the concave joint 20 is snapped into place by fixing the anchor 24 on the second reinforcing rib 23, thereby realizing the interlocking connection between the convex joint 10 and the concave joint 20.

[0043] In this embodiment of the invention, the components of the convex joint 10 and the concave joint 20 can be fixedly connected by welding, such as... Figure 8 As shown, the first long side, the second long side, and the first short side of the first reinforcing rib 13 are all connected to the inner wall of the first pile sleeve 11, the first end plate 12, and the shear plate 14 by welding, thus forming a weld 16. The installation method of the second reinforcing rib 23 is similar, and will not be described in detail here.

[0044] In the prototype of this invention, in order to achieve the best connection effect, a first pile sleeve 11, a second pile sleeve 21, a first end plate 12, a second end plate 22, a first reinforcing rib 13, and a second reinforcing rib 14 with completely identical shapes and sizes can be selected.

[0045] Specifically, such as Figure 1 As shown, in this embodiment of the invention, the second short sides of the first reinforcing rib 13 and the second reinforcing rib 23 are stepped, and the length of the first long side of the first reinforcing rib 13 and the second reinforcing rib 23 is greater than the length of the second long side. In this embodiment, the length of each step of the first reinforcing rib 13 and the second reinforcing rib 23 can be 1 / 4 to 1 / 3 of the overall length. Preferably, in this embodiment, the second short sides of the first reinforcing rib 13 and the second reinforcing rib 23 include two steps.

[0046] Specifically, such as Figure 1 As shown, in this embodiment of the invention, the connection between the first long side and the second short side of the first reinforcing rib 13 is flush with the edge of the first pile sleeve 11; the connection between the first long side and the second short side of the second reinforcing rib 23 is flush with the edge of the second pile sleeve 21. Therefore, in this embodiment, the length of the first reinforcing rib 13 is close to or equal to the length of the first pile sleeve 11, and the length of the second reinforcing rib 23 is close to or equal to the length of the second pile sleeve 21.

[0047] Specifically, such as Figure 1 As shown, in this embodiment of the invention, when the convex joint 10 and the concave joint 20 are connected, both ends of the shear plate 14 are flush with the connection points of the second long side and the second short side of the first reinforcing rib 13 and the second long side and the second short side of the second reinforcing rib 23, respectively. The length of the shear plate 14 in this embodiment of the invention can be set in conjunction with the length of the first pile sleeve 11. Those skilled in the art can also set other dimensions, which are not specifically limited here.

[0048] Specifically, such as Figure 2 , Figure 8 As shown, in this embodiment of the invention, both the side of the shear plate 14 fixed to the first reinforcing rib 13 and the side away from the first reinforcing rib 13 are arc surfaces, and the centers of the two arc surfaces are close to the axis of the first pile sleeve 11. The dimensions of the arc surfaces of the shear plate 14 in this embodiment of the invention can be referenced to the arc of the inner wall of the first pile sleeve 11, and the steel plate is stamped accordingly.

[0049] Specifically, as shown in Figure 2 the cross section of the convex joint 10 in the embodiment of the present application, the first pile sleeve 11, the first reinforcing rib 13 and the shear plate 14 are connected in an I-shaped structure. That is, the thickness of the first reinforcing rib 13 is less than the width of the shear plate 14, and the I-shaped steel structure strengthens the engagement effect of the convex joint 10 and the in-cavity concrete, so that the pipe pile connection is more reliable.

[0050] Specifically, as shown in Figures 1 to 8 the first end plate 12 and the second end plate 22 in the embodiment of the present application are provided with a plurality of upset head holes 15 matched with a plurality of prestressed steel bars 50 distributed in the first pipe pile end 30 and the second pipe pile end 40, and the upset heads of the prestressed steel bars 50 are anchored in the upset head holes 15. The positions and the number of the upset head holes correspond to the prestressed steel bars 50 completely, so that the upset head of each prestressed steel bar 50 is anchored in the corresponding upset head hole 15.

[0051] Specifically, as shown in Figure 1 and Figure 4 the embodiment of the present application further includes a spiral stirrup 60, and the spiral stirrup 60 is wound outside the prestressed steel bar 50. Specifically, in the embodiment of the present application, the spiral stirrup 60 is densified in the range of 3d-5d near the cylindrical steel sleeve, and the length of the spiral stirrup 60 extending into the cylindrical steel sleeve is 1 / 4-1 / 3 of the length of the cylindrical steel sleeve. In the embodiment of the present application, the width of the first reinforcing rib 13 and the second reinforcing rib 23 can be set in combination with the position of the prestressed steel bar 50, for example, the width is set to maintain a gap of 5mm-10mm with the spiral stirrup 60 outside the prestressed steel bar 50.

[0052] Specifically, as shown in Figure 1 the connecting part of the first pile sleeve 11, the second pile sleeve 21, the first end plate 12 and the second end plate 22 in the embodiment of the present application is provided with a weld chamfer groove 70, and welding is performed in the weld chamfer groove when the convex joint 10 and the concave joint 20 are connected.

[0053] For the convex joint 10, after the steel reinforcement cage composed of the prestressed steel bar 50 and the spiral stirrup 60 is completed, the first reinforcing rib 13 is welded with the inner wall of the first pile sleeve 11 and the first end plate 12, then the first reinforcing rib 13 is welded with the shear plate 14, and then the steel formwork is installed, the fine stone concrete is poured, the centrifugal mixer is stirred, the maintenance is performed, the demolding is performed, and the pile is formed.

[0054] For the concave joint 20, after the reinforcement cage composed of the prestressed steel bar 50 and the spiral stirrup 60 is completed, the second reinforcing rib 23 is welded with the inner wall of the second pile sleeve 21, the second reinforcing rib 23 is welded with the anchor 24 and the second end plate 22, since the shear plate 14 will penetrate when connected with the convex joint 10, a prefabricated groove 25 needs to be arranged at the corresponding position, then the steel formwork is installed, the fine stone concrete is poured, the centrifugal mixer is stirred, maintained, demolded and the pile is formed.

[0055] The present application also includes a pipe pile construction method for the bending-resistant pipe pile end head area reinforced joint of the above-mentioned embodiments, as shown in the figure, the method includes the steps of: Figure 9

[0056] S1: Centering the first pipe pile end head and the second pipe pile end head installed with the convex joint and the concave joint, and inserting the shear plate of the convex joint into the anchor of the concave joint.

[0057] The structure of the convex joint 10 and the concave joint 20 in the present embodiment is as described in the foregoing embodiments, which will not be repeated. The installation sequence of the convex joint 10 and the concave joint 20 is not limited, but in order to protect the protruding shear plate 14 of the convex joint 10, it is appropriate to have the concave joint 20 upward and the convex joint 10 downward.

[0058] When a section of pipe pile is drilled (pressed / hammered) into the ground layer to a height of about 1.0m from the ground, the construction is paused, another section of pipe pile is lifted by the automobile crane, the convex joint 10 is downward and the concave joint 20 is upward, when the two sections of pipe pile are about 0.3m apart, the verticality of the lifted section of pipe pile is slowly adjusted, and the centering is performed with the lower pipe pile, when the shear plate 14 of the convex joint 10 and the prefabricated groove 25 of the concave joint 20 are all aligned, the upper section of pipe pile is slowly lowered, the shear plate 14 is inserted into the prefabricated groove 25 and clamped in the anchor 24, until the end plates of the two sections of pipe pile are completely attached.

[0059] S2: After the first end plate and the second end plate are attached, the connection between the first pile sleeve, the second pile sleeve, the first end plate and the second end plate is welded.

[0060] In the present embodiment, two welding machines can be arranged symmetrically on both sides of the pipe pile joint, and synchronous welding is performed respectively, after a full circle of welding, the welding slag is cleaned, and another full circle of welding is performed. After the welding seam is cooled for about 20 minutes, the pipe pile is drilled (pressed / hammered) again, and the above steps are repeated until the construction of a pipe pile is completed.

[0061] ​The pipe pile construction method of the anti-bending pipe pile end head area reinforcing joint, the convex joint and the concave joint of the embodiment of the application, the first reinforcing rib and the second reinforcing rib are respectively distributed in a circumferential direction along the inner wall of the first pile sleeve hoop and the second pile sleeve hoop, and the arrangement direction is consistent with the pile axis, the first reinforcing rib and the second reinforcing rib are respectively fixedly connected with the first end plate and the second end plate, thereby forming a joint structure with greater overall rigidity, and the contact area between the inner cavity of the joint and the concrete is also increased, the concrete in the pile sleeve hoop is prevented from being separated from the end plate and the sleeve hoop, the problems of concrete separation and crushing in the end head area are solved, the problem of the end plate being deformed in an ''O'' shape is completely eliminated, the connection of the pipe pile end head area is more reliable, and in addition, the convex joint and the concave joint of the application adopt a socket type connection mode, after the concave-convex joint is inserted in butt joint, full welding of the outer circle of the end plate can be performed, the shear plate is additionally arranged, and is anchored by the first reinforcing rib and the anchoring piece, the weld of the outer circle of the end plate and the shear plate jointly bear the bending moment and the shear force, the shear resistance and the bending resistance of the pipe pile end head reinforcing area and the joint are greatly improved, and the construction quality is easier to control.

[0062] The above is further described with the help of specific embodiments, but it should be understood that the specific description herein should not be understood as limiting the essence and scope of the application, and various modifications made to the above embodiments by those skilled in the art after reading the specification all belong to the scope of protection of the application.

Claims

1. A reinforcing joint for the end area of ​​a bending-resistant pipe pile, characterized in that, This includes convex and concave joints respectively installed on the ends of the first and second pipe piles, wherein, The convex joint includes a first pile sleeve, a first end plate, a plurality of first reinforcing ribs, and a plurality of shear plates matching the number of the first reinforcing ribs; the first pile sleeve is fitted onto the end of the first pipe pile; the first end plate is located on the end face of the end of the first pipe pile, and the edge of the first end plate is integrally connected to the first pile sleeve; the plurality of first reinforcing ribs are circumferentially distributed along the inner wall of the first pile sleeve, and the first long side of the first reinforcing rib is fixed to the inner wall of the first pile sleeve, and the first short side of the first reinforcing rib is fixed to the first end plate; the shear plate is partially fixed to the second long side of the first reinforcing rib, and the other part protrudes outward through the first end plate; The concave joint includes a second pile sleeve, a second end plate, a plurality of second reinforcing ribs, and a plurality of anchors matching the number of the second reinforcing ribs; the second pile sleeve is fitted onto the end of the second pipe pile; the second end plate is located on the end face of the end of the second pipe pile, and the edge of the second end plate is integrally connected with the second pile sleeve; the plurality of second reinforcing ribs are circumferentially distributed along the inner wall of the second pile sleeve, and the first long side of the second reinforcing rib is fixed on the inner wall of the second pile sleeve, the first short side of the second reinforcing rib is fixed on the second end plate, and at least one anchor is fixed on the second long side of the second reinforcing rib; When the convex joint and the concave joint are connected, another part of the shear plate passes through the second end plate and is snapped into the anchor; the first end plate and the second end plate are fixedly connected. The second short sides of the first reinforcing rib and the second reinforcing rib are stepped, and the length of the first long side of the first reinforcing rib and the second reinforcing rib is greater than the length of the second long side; The junction of the first long side and the second short side of the first reinforcing rib is flush with the edge of the first pile sleeve; the junction of the first long side and the second short side of the second reinforcing rib is flush with the edge of the second pile sleeve. When the convex joint and the concave joint are connected, the two ends of the shear plate are respectively flush with the connection between the second long side and the second short side of the first reinforcing rib and the connection between the second long side and the second short side of the second reinforcing rib.

2. The reinforcing joint at the end area of ​​a bending-resistant pipe pile as described in claim 1, characterized in that, The side of the shear plate that is fixed to the first reinforcing rib and the side that is away from the first reinforcing rib are both arc surfaces, and the centers of the two arc surfaces are close to the axis of the first pile sleeve.

3. The reinforcing joint at the end zone of a bending-resistant pipe pile as described in claim 1, characterized in that, In the cross-section of the convex joint, the first pile sleeve, the first reinforcing rib, and the shear plate are connected in an I-shaped structure.

4. The reinforcing joint at the end zone of a bending-resistant pipe pile as described in claim 1, characterized in that, The first end plate and the second end plate are provided with a plurality of upset head holes that match a plurality of prestressed steel bars distributed in the ends of the first pipe pile and the second pipe pile, and the upset heads of the prestressed steel bars are anchored in the upset head holes.

5. A reinforcing joint for the end area of ​​a bending-resistant pipe pile as described in claim 4, characterized in that, It also includes spiral stirrups, which are wrapped around the outside of the prestressed steel bar.

6. The reinforcing joint at the end area of ​​a bending-resistant pipe pile as described in claim 1, characterized in that, The connection between the first pile sleeve, the second pile sleeve, the first end plate, and the second end plate is provided with a weld chamfer groove.

7. A method for constructing pipe piles using the end-area reinforcement joint of the bending-resistant pipe pile as described in any one of claims 1 to 6, characterized in that, The method includes the following steps: S1: Align the first pipe pile end and the second pipe pile end, which are equipped with the convex joint and the concave joint, and insert the shear plate of the convex joint into the anchor of the concave joint; S2: After the first end plate and the second end plate are attached, weld the connection between the first pile sleeve, the second pile sleeve, the first end plate, and the second end plate.

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