Self-locking support pile, manufacturing method, row support system and construction method

Abstract

The application discloses a self-locking support pile, a manufacturing method, a row support system and a construction method. The support pile comprises a pile body and a steel reinforcement cage. A central hole is arranged in the middle of the pile body. First and second connecting surfaces are arranged on the opposite sides of the pile body. The first and second connecting surfaces are connected through a support surface. The first connecting surface is provided with an outward protruding tenon. The second connecting surface is provided with an inward recessed groove. The tenon and the groove extend along the axial direction of the central hole. The tenon and the groove are matched with each other. The tenon of one pile body can be slidably matched with the groove of another pile body along the axial direction of the central hole and is limited to move in other directions except the axial direction of the central hole by the groove. The self-locking support pile disclosed by the application can be self-locked through the matching of the tenon and the groove. Auxiliary construction by a guide frame is not needed, the construction efficiency is improved, the construction and labor costs are saved, and the horizontal bearing capacity and the water and soil stopping effect of the support system are improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of support piles, in particular to a self-locking support pile, a manufacturing method, a row support system and a construction method. BACKGROUND

[0002] The prefabricated concrete support pile is a new type of concrete component gradually applied to the retaining structure of river bank soil retaining and building foundation pit in recent years. Compared with the traditional riprap revetment, filling pile and gravity retaining wall used in water conservancy projects, the concrete support pile has the advantages of convenient construction, material saving, strong controllability of construction quality and the like, and is widely used in the regulation and reinforcement of rivers, lakes and the like and farmland water conservancy construction in recent years.

[0003] In the related art, the prefabricated concrete support pile is pressed into the soil layer of the embankment by using a pile pressing device, and the adjacent support piles are arranged in close proximity to form a blocking surface for the embankment soil. At present, a commonly used support pile has a circular cross section. In the actual use process, since the support pile is in the form of a cylinder, the two adjacent support piles of the support system are linearly attached to each other, the overallity between the piles is poor, the collaborative bearing capacity is poor, and when the attached part of the two adjacent support piles is subjected to a large pressure, the soil and water in the soil are likely to pass through the gap between the two adjacent support piles to reduce the water and soil stopping effect of the support system, it is difficult to form a support system with high bearing capacity, and the support system is usually composed of a plurality of support piles arranged in a row. Each support pile needs to be assisted by a guide frame during the construction of the pile, and the guide frame needs to be moved along with the construction of different support piles. The construction is relatively complicated, and even with the assistance of the guide frame, different support piles will have different degrees of vertical error, it is difficult to ensure the perpendicularity of the support piles, and it is likely that the support piles in a support system will be inclined in different directions, resulting in insufficient horizontal bearing capacity of the support system and widespread seepage of water and soil. SUMMARY

[0004] The application provides a self-locking support pile, a manufacturing method, a row support system and a construction method to solve at least one of the above technical problems.

[0005] The technical scheme adopted by the application is as follows:

[0006] A self-locking type support pile, comprising a pile body formed by concrete pouring and a steel cage embedded in the pile body, a central hole is arranged in the middle of the pile body, a first connecting surface and a second connecting surface are respectively arranged on the opposite sides of the pile body, the first connecting surface and the second connecting surface are connected through a support surface, the first connecting surface is provided with a protruding tenon, the second connecting surface is provided with a recessed groove, and the tenon and the groove respectively extend along the axial direction of the central hole; the tenon and the groove are matched with each other, and the tenon of one pile body can be slidably connected with the groove of another pile body along the axial direction of the central hole and is limited to move in other directions except the axial direction of the central hole.

[0007] The self-locking type support pile in the present application also has the following additional technical features:

[0008] The tenon and the groove are configured as dovetail-shaped structures, and the taper angle of the tenon is between 45-70°.

[0009] The outer side surface of the tenon is connected with the first connecting surface through a first arc surface, the inner side surface of the groove is connected with the second connecting surface through a second arc surface, and the cooperation of the first arc surface and the second arc surface guides the relative sliding of the tenon and the groove and limits the movement of the tenon in other directions except the axial direction of the central hole.

[0010] The steel cage comprises a plurality of prestressed steel bars, the prestressed steel bars extend along the axial direction of the pile body, and a plurality of the prestressed steel bars are arranged around the outer periphery of the central hole; the top end of the pile body is provided with a counterbore corresponding to the top of the prestressed steel bars, and a connecting sleeve connected with the prestressed steel bars is installed in the counterbore.

[0011] The length of the connecting sleeve is less than the length of the counterbore, so that the connecting sleeve is entirely hidden in the counterbore, and the end surface of the connecting sleeve is lower than the pile end surface by more than 45mm.

[0012] The present application provides a method for manufacturing a self-locking type support pile, which is used to manufacture the self-locking type support pile as described above, and comprises the following steps:

[0013] S1, a steel cage formed by connecting prestressed steel bars and stirrups is manufactured, the end of the prestressed steel bar is connected with a steel sleeve, and the steel cage and the mold are hoisted to the work site, wherein: the mold comprises a cover mold, a bottom mold, an upper lining box and a lower lining box, the upper lining box and the lower lining box have the same structure and size, the cover mold and the bottom mold are provided with tongue and groove flanges, so that when the upper lining box and the lower lining box are respectively installed in the cover mold and the bottom mold according to the preset position and the cover mold and the bottom mold are closed, a pile body forming space matching the outer contour of the self-locking type support pile can be obtained;

[0014] S2, the bottom die is placed on the ground, the lower lining box is detachably installed in the bottom die according to the preset position through the connecting bolts, the lower lining box and the inner wall of the bottom die are all coated with release agent, the prepared reinforcement cage is placed in the bottom die, and then the end of the prestressed steel of the reinforcement cage is connected with the tension screw on the tension anchorage plate through the connecting sleeve;

[0015] S3, the concrete material prepared according to the design strength requirement and the mixing ratio is quantitatively and uniformly poured and arranged in the bottom die;

[0016] S4, the upper lining box is detachably fixed in the cover die through the connecting bolts according to the preset position, the upper lining box and the inner wall of the bottom die are all coated with release agent, and then the cover die and the bottom die are closed through the cooperation of the closing bolts and the nuts, at this time, the upper lining box and the lower lining box are tightly attached and symmetric about the horizontal center plane of the mold;

[0017] S5, the prestressed steel is prestressed and tensioned through the tensioning equipment according to the set control value, after the prestressed tensioning is completed, the mold is hoisted as a whole on the centrifuge through the hoisting equipment, so that the centrifugal forming of the pile body on the centrifuge is completed, in the process of centrifugal forming, the concrete material is structured into the central hole of the pile body under the centrifugal force, the upper lining box and the lower lining box are gradually structured into the grooves of the support pile, and the inner contours of the cover die and the bottom die are gradually structured into the support surface and the tenon of the support pile;

[0018] S6, after the centrifugal forming is completed, the generated concrete surplus slurry is poured out, and the mold is moved and hoisted to a curing site for steam curing of the pile body with the mold until the support pile reaches the demolding strength;

[0019] S7, after the curing is completed, the mold is moved and hoisted out of the curing site, the prestressed steel is first released, the closing bolts are loosened after the release, the connecting bolts for fixing the upper lining box and the lower lining box on the cover die and the bottom die are removed, the cover die is detached from the bottom die, the prefabricated pile is taken out from the bottom die, and the upper lining box and the lower lining box adhered to the pile are removed to obtain the finished pile.

[0020] Preferably, the centrifugal process of the mold on the centrifuge for the centrifugal forming of the pile body mainly consists of four stages of low-speed centrifugation, medium-low-speed centrifugation, medium-high-speed centrifugation and high-speed centrifugation.

[0021] The self-locking type support pile is made by the method for making the self-locking type support pile as described above.

[0022] The construction method of the row support system provided by the application is applied to the row support system as described above, and the construction method comprises the following steps:

[0023] (1) The number of self-locking support piles required is calculated according to the total row length required by the row support system and the width of the support surface of the self-locking support pile, and the corresponding number of self-locking support piles are transported to the construction site;

[0024] (2) The first support pile is gradually pressed down at the preset position by the pile pressing equipment, and the vertical deviation is continuously corrected during the pressing process to ensure the perpendicularity of the first support pile, until the first support pile is sunk to the preset depth;

[0025] (3) The second support pile is vertically lifted by the hoisting equipment, so that the bottom end of the second support pile is higher than the top end of the first support pile, the tenon of the second support pile is aligned with the groove of the first support pile or the groove of the second support pile is aligned with the tenon of the first support pile according to the row trend of the row support system, and the hoisting equipment is lowered to place the second support pile, so that the tenon of the second support pile slides into the groove of the first support pile from top to bottom or the tenon of the first support pile slides into the groove of the second support pile from bottom to top, until the second support pile is in contact with the ground, and then the second support pile is gradually pressed down by the pile pressing equipment, until the second support pile is pressed to the same height as the first support pile;

[0026] (4) The remaining support piles are sequentially pressed according to the construction method of the second support pile.

[0027] Due to the adoption of the above technical solutions, the application achieves the following technical effects:

[0028] 1. The first connecting surface and the second connecting surface are respectively arranged on the two opposite sides of the pile body, the first connecting surface is provided with a tenon, the second connecting surface is provided with a groove, the tenon and the groove are mutually matched in structure, and the tenon of one pile body can be slidably matched with the groove of another pile body along the axial direction of the central hole, so that when the row support system is formed by pressing and piling the plurality of support piles, only the first support pile needs to be piled and the perpendicularity needs to be ensured, and then the remaining support piles can be sequentially constructed under the sliding guidance of the tenon and the groove, without the need for auxiliary construction by the guide frame, the setting of the guide frame is cancelled, the construction process is simplified, the construction efficiency is greatly improved, the construction and labor costs are saved, and at the same time, the adjacent support piles can be arranged in parallel, the subsequent constructed support piles can have good perpendicularity on the premise that the perpendicularity of the first support pile is ensured, the phenomenon that multiple support piles in one support system are inclined in different directions is avoided as much as possible, and the horizontal bearing capacity of the support system is improved.

[0029] 2. When the tenon of one pile body can be slidably matched with the groove of another pile body along the axial direction of the central hole, the tenon is limited to move in other directions except the axial direction of the central hole by the groove, so that after the construction of the support pile, the self-locking of the two adjacent support piles in the horizontal direction is realized through the tenon and the groove, the relative relative displacement of the two adjacent support piles in the horizontal direction cannot occur, the multiple support piles are locked in series to form a rigid support wall structure, the overall performance, bending strength and collaborative bearing capacity of the support system are greatly improved, and the locking of the two adjacent support piles through the tenon and the groove forms a good sealing effect, so that the gap between the two adjacent support piles is basically not formed, the earth and the water in the soil cannot easily pass through between the two adjacent support piles, and the water and soil stopping effect of the support system is greatly improved, so that the water and soil seepage phenomenon of the support system is avoided.

[0030] 3. The tenon and the groove are configured in a dovetail shape in cross section, the structure is simple, the difficulty of forming the support pile is reduced, the structure of the forming mold is simplified, the dovetail-shaped tenon and the dovetail-shaped groove are engaged, the stability and strength of the two adjacent support piles are effectively improved, the risk of loosening and deformation is reduced, and the structure can further adapt to the slight deformation caused by the structure stress.

[0031] 4. The existence of the first arc surface and the second arc surface reduces the sharpness of the edge position of the tenon and the groove, thereby reducing the influence of the processing error, so that the relative sliding of the tenon and the groove is more smooth under the guidance of the first arc surface and the second arc surface, and the piling construction of the support pile is more rapid and smooth. In addition, the parts of the mold corresponding to the first arc surface and the second arc surface should also be arc-shaped structures during the forming of the pile body. Compared with the sharp structure, it is helpful for the concrete material to accumulate at this position during the forming of the pile body, thereby constructing the first arc surface and the second arc surface with good quality, firmness and reliability, improving the structural strength of the tenon and the groove, and further improving the reliability of the locking of the two adjacent support piles through the tenon and the groove.

[0032] 5. By arranging a plurality of prestressed steel bars along the axial direction of the pile body, the prestressed steel bars apply pressure to the support pile. When the support pile bears the tensile force generated by the external load, the existing pre-pressure in the support pile is first offset, and then with the increase of the load, the support pile is subjected to tension and then cracks appear, thereby delaying the occurrence and development of cracks in the support pile, which helps to improve the crack resistance, stiffness and impermeability of the support pile, and fully play the performance of the support pile. BRIEF DESCRIPTION OF DRAWINGS

[0033] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0034] Figure 1 This is a top view of the support pile provided in the embodiments of this application;

[0035] Figure 2 This is a front view of the support pile provided in the embodiments of this application;

[0036] Figure 3 This is a schematic diagram of the structure of one support pile and another support pile provided in the embodiments of this application;

[0037] Figure 4 for Figure 1 A magnified view of the structure at point A in the middle;

[0038] Figure 5 This is a partial cross-sectional view of the support piles provided in the embodiments of this application;

[0039] Figure 6 for Figure 5 A magnified view of the structure at point B in the middle;

[0040] Figure 7 This is a schematic diagram of the mold structure provided in the embodiments of this application;

[0041] Figure 8 This is a schematic diagram of the structure of the molded pile body provided in the embodiments of this application;

[0042] Figure 9 A cross-sectional view showing the connection and mating of the support piles and tension anchor plates provided in the embodiments of this application via tension bolts;

[0043] Figure 10 for Figure 9 A magnified view of the structure at point C in the middle;

[0044] Figure 11 This is a schematic diagram of the structure of the row support system provided in the embodiments of this application. Figure 1 ;

[0045] Figure 12 This is a schematic diagram of the structure of the row support system provided in the embodiments of this application. Figure 2 ;

[0046] Figure 13 This is a schematic diagram of the structure of the row support system provided in the embodiments of this application. Figure 3 .

[0047] List of components and reference numerals:

[0048] 1 support pile, 11 pile body, 111 center hole, 1121 first connecting surface, 1122 second connecting surface, 113 support surface, 114 tenon, 115 groove, 116 tail tenon, 1171 first arc surface, 1172 second arc surface, 118 counterbore, 12 prestressed steel, 13 connecting sleeve;

[0049] 2 mold, 21 cover mold, 22 bottom mold, 23 upper lining box, 24 lower lining box, 25 rabbet flange, 26 connecting bolt, 27 positioning boss;

[0050] 3 tensioning anchor plate;

[0051] 4 tensioning screw;

[0052] 5 mold bolt;

[0053] 6 nut;

[0054] 7 connecting girder. DETAILED DESCRIPTION

[0055] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0056] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can be practiced in other ways different from those described herein, therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0057] In addition, in the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0058] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0059] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0060] like Figures 1 to 6 As shown, a self-locking support pile 1 includes a pile body 11 formed by concrete pouring and a steel cage embedded in the pile body 11. A central hole 111 is provided in the middle of the pile body 11. A first connecting surface 1121 and a second connecting surface 1122 are respectively provided on opposite sides of the pile body 11. The first connecting surface 1121 and the second connecting surface 1122 are connected by a support surface 113. The first connecting surface 1121 is provided with an outwardly protruding tenon 114, and the second connecting surface 1122 is provided with an inwardly recessed groove 115. The tenon 114 and the groove 115 extend along the axial direction of the central hole 111. The tenon 114 and the groove 115 are structurally compatible with each other, allowing the tenon 114 of one pile body 11 to slide and engage with the groove 115 of the other pile body 11 along the axial direction of the central hole 111, and is restricted by the groove 115 to move in directions other than the axial direction of the central hole 111.

[0061] Specifically, the reinforcing cage is placed in the mold before the pile body 11 is formed, and is finally integrally formed with the pile body 11 in the mold to form the support pile 1. The reinforcing cage is mainly composed of prestressed steel bars 12 and stirrups. The reinforcing cage mainly plays a tensile role and restrains the concrete of the pile body, enabling the pile body 11 to withstand a certain horizontal force. The central hole 111 of the pile body 11 can be used to install precast guardrails and other structures.

[0062] In the technical solution, the first connecting surface 1121 is provided with a tenon 114, and the second connecting surface 1122 is provided with a groove 115, the tenon 114 and the groove 115 are matched with each other in structure, and the tenon of one pile body can be slidably matched with the groove of another pile body in the axial direction of the center hole, so that when the plurality of support piles 1 are constructed and pressed into piles to form a row support system, only the first support pile 1 needs to be pressed into the pile and the verticality needs to be ensured, and then the remaining support piles 1 are sequentially constructed through the sliding guiding action of the tenon and the groove, and the subsequent support piles can have good verticality under the premise of ensuring the verticality of the first support pile, so as to avoid the phenomenon that a plurality of support piles in a support system are inclined in different directions as much as possible, and the horizontal bearing capacity of the support system is improved. In the preferred embodiment, as shown in Figure 2 the pile body 11 can be integrally constructed as a flat structure at the top end and a pointed structure at the bottom end, the flat structure at the top end can better support the guardrails, columns, ground beams and the like installed above the pile body 11, and the pointed structure at the bottom end can guide and compact the soil when the support pile is inserted into the soil, thereby reducing the pile pressing force, making the construction easy, improving the construction efficiency, and preventing the support pile from being damaged.

[0063] As shown in Figure 3 when the tenon of one pile body can be slidably matched with the groove of another pile body in the axial direction of the center hole, the tenon is limited to move in other directions except the axial direction of the center hole by the groove, so that after the construction of the support pile 1, the adjacent two support piles are self-locked in the horizontal direction through the tenon and the groove, cannot relatively dislocate along the horizontal plane, and are locked in series to form a row of rigid support wall structure, thereby greatly improving the integrity, bending strength and cooperative bearing capacity of the support system, and moreover, the adjacent two support piles 1 are locked through the tenon and the groove, a good sealing effect is formed, and there is basically no gap between the adjacent two support piles 1, so that the earth and water in the soil cannot easily pass through between the adjacent two support piles 1, thereby greatly improving the water and soil stopping effect of the support system and avoiding the water and soil seepage phenomenon of the support system.

[0064] As a preferred embodiment, as shown in Figure 1 and Figure 4As shown, the tenon 114 and the groove 115 are configured as dovetail-shaped structures in cross section, and the taper angle a of the tenon 114 is between 45-70°. Those skilled in the art can understand that the tenon 114 and the groove 115 are configured as dovetail-shaped structures in cross section, which is simple in structure and reduces the difficulty of forming the support pile 1, simplifies the structure of the forming support pile mold, and effectively improves the stability and strength of the adjacent two support piles 1 through the engagement of the dovetail-shaped tenon and the dovetail-shaped groove, reduces the risk of loosening and deformation, and can also more greatly adapt to the slight deformation caused by the structure stress. The taper angle of the tenon 114 is between 45-70°, for example, the taper angle of the tenon 114 can be 50°, 55°, 60°, etc., so that the taper angle of the tenon 114 is between reasonable regions, and through factual demonstration, the taper angle of the tenon 114 is between 45-70°, which can prevent the taper angle from being too small to cause insufficient locking force with the groove and easily disengage, and can also prevent the taper angle from being too large to cause the tenon 116 constituting the groove 115 to be too thin to reduce the bearing capacity or cause the tenon 116 to break. In other embodiments, the tenon 114 and the groove 115 can also be selected as other suitable structures.

[0065] Further, as shown in Figure 1 and Figure 3 , the outer side surface of the tenon 114 is connected with the first connecting surface 1121 through a first arc surface 1171, and the inner side surface of the groove 115 is connected with the second connecting surface 1122 through a second arc surface 1172, and the cooperation of the first arc surface 1171 and the second arc surface 1172 guides the relative sliding of the tenon 114 and the groove 115, and limits the movement of the tenon 114 in directions other than the axial direction of the center hole 111. Those skilled in the art can understand that the existence of the first arc surface 1171 and the second arc surface 1172 reduces the sharpness of the edge position of the tenon 114 and the groove 115, and further reduces the influence of the processing error, so that the relative sliding of the tenon and the groove is more smooth under the cooperation of the first arc surface and the second arc surface, and the pile pressing construction of the support pile 1 is more rapid and smooth. In addition, during the forming process of the pile body 11, the parts of the mold 2 corresponding to the first arc surface 1171 and the second arc surface 1172 should also be arc-shaped structures, which is helpful for the concrete material to accumulate at this position during the forming process of the pile body 11, thereby constructing the first arc surface 1171 and the second arc surface 1172 with good quality, firmness and reliability, improving the structural strength of the tenon 114 and the groove 115, and further improving the reliability of the locking of the adjacent two support piles 1 through the tenon and the groove.

[0066] As a preferred embodiment of the present application, as shown in Figure 1 , Figure 5 and Figure 6As shown, the reinforcement cage comprises a plurality of prestressed steel bars 12 extending in the axial direction of the pile body 11, the plurality of prestressed steel bars 12 are arranged at intervals around the outer periphery of the central hole 111, the top end of the pile body 11 is provided with a counterbore 118 corresponding to the top of the prestressed steel bar 12, and a connecting sleeve 13 connected with the prestressed steel bar 12 is installed in the counterbore 118. By arranging a plurality of prestressed steel bars 12 in the axial direction of the pile body 11, the prestressed steel bars 12 exert pressure on the support pile 1, when the support pile 1 bears the tensile force generated by the external load, the prestressed steel bars 12 first offset the existing pre-pressure in the support pile 1, and then as the load increases, the support pile 1 is subjected to tension and then cracks appear, thereby delaying the occurrence and development of cracks in the support pile 1, which helps to improve the crack resistance, stiffness and impermeability of the support pile 1, and fully plays the performance of the support pile 1. The connecting sleeve 13 can serve as an intermediate part for connecting the tensioning equipment and the prestressed steel bar 12, improving the convenience and stability of the connection between the tensioning equipment and the prestressed steel bar 12. Specifically, the connecting sleeve 13 can be provided with internal threads to connect with connecting fasteners provided with external threads. Specifically, in order to facilitate tensioning and also to facilitate the prestressed steel bar 12 to remain fixed in the pile body 11 after tensioning, a corresponding connecting sleeve 13 and the bottom of the prestressed steel bar 12 can also be provided at the bottom end of the pile body 11.

[0067] Further, as shown in Figure 6 The length of the connecting sleeve 13 is less than the length of the counterbore 118 and the end face of the connecting sleeve is lower than the height of the pile end face by more than 45 mm, so that the connecting sleeve 13 is hidden in the counterbore 118 as a whole. Those skilled in the art can understand that hiding the connecting sleeve 13 in the counterbore 118 as a whole can ensure the flatness of the top end face of the pile body 11, avoid the connecting sleeve 13 protruding from the top end face of the pile body 11 due to installation errors, and avoid interference with the installation of structures such as guardrails, column piers, ground beams and tensioning and anchoring plates at the central hole 111 of the support pile 1. At the same time, hiding the connecting sleeve 13 in the counterbore 118 as a whole leaves space in the counterbore 118 for filling and sealing structures. After the construction of the support pile 1, mortar or sealant can be injected into the counterbore 118 to isolate the connecting sleeve 13 from the external atmospheric environment, prevent components in the external atmospheric environment from accelerating the corrosion of the connecting sleeve 13, and improve the service life.

[0068] The present application provides a manufacturing method of a self-locking support pile, specifically, the manufacturing method is used for manufacturing the self-locking support pile 1 as described above, and the manufacturing method comprises the following steps:

[0069] S1, manufacturing a reinforcement cage formed by connecting prestressed steel bars 12 and stirrups, the end of the prestressed steel bar 12 is connected with a steel sleeve, and the reinforcement cage and a mold 2 are hoisted to a work site, wherein: Figure 2As shown, the mold 2 comprises a cover mold 21, a bottom mold 22, an upper lining box 23 and a lower lining box 24, the upper lining box 23 and the lower lining box 24 are the same in structure and size, the cover mold 21 and the bottom mold 22 are provided with tongue and groove flanges 25, so that by mounting the upper lining box 23 and the lower lining box 24 in the cover mold 21 and the bottom mold 22 respectively according to the preset position, and closing the cover mold 21 and the bottom mold 22, a pile body 11 forming space matching the outer contour of the self-locking type support pile 1 can be obtained; specifically, the prestressed steel bars 12 are straight steel bars, and the stirrups are connected to all the prestressed steel bars 12; the upper lining box 23 and the lower lining box 24 can be used to construct the grooves 115 of the pile body 11, and the tenons 114 of the pile body 11 can be constructed by the inner wall structure of the cover mold 21 and the bottom mold 22.

[0070] S2, place the bottom mold 22 on the ground, detachably mount the lower lining box 24 in the bottom mold 22 according to the preset position through the connecting bolts 26, coat the inner wall of the lower lining box and the bottom mold with release agent, place the prepared steel cage in the bottom mold 22, and then connect the end of the prestressed steel bar 12 of the steel cage to the tensioning screw 4 on the tensioning anchor plate 3 through the connecting sleeve 13 (see Figure 9 and Figure 10 ); specifically, the bottom mold 22 is placed on a base, the mold 2 can be lifted as a whole to tension the prestressed steel bars 12; the surface of the lower lining box 24 is coated with release agent, which facilitates smooth demolding of the lower lining box 24 after the pile body 11 is formed, preventing the lower lining box 24 from sticking to the concrete material; specifically, as shown in Figure 7 , a positioning boss 27 can be arranged inside the lower lining box 24, the positioning boss 27 is provided with a threaded hole, and the connecting bolt 26 is arranged from the outside to the inside of the bottom mold 22 and cooperates with the threaded hole to fix the lower lining box 24 at the preset position of the bottom mold 22.

[0071] S3, quantitatively and uniformly arrange the concrete material prepared according to the design strength requirement and the mixing ratio in the bottom mold 22; specifically, before construction, an exploration test should be conducted on the construction site to calculate the strength of the pile body 11 of the required support pile 1, so that after the proportions of each ingredient of the concrete material are mixed, a pile body 11 meeting the high strength requirement can be formed, and the high-strength pile body 11 ensures the compression bearing capacity and also has high impermeability.

[0072] S4. The upper lining box 23 is detachably fixed inside the cover mold 21 at a preset position by connecting bolts 26. The upper lining box and the inner wall of the cover mold are completely coated with release agent. Then, the cover mold 21 and the bottom mold 22 are closed by the engagement of the mold-closing bolts 5 and nuts 6. At this time, the upper lining box 23 and the lower lining box 24 are tightly attached and symmetrical about the horizontal center plane of the mold 2. Specifically, the surface of the upper lining box 23 is coated with release agent to facilitate smooth demolding of the upper lining box 23 after the pile body 11 is formed, preventing the upper lining box 23 from sticking to the concrete material. Similarly, it can... A positioning boss 27 is provided inside the upper liner box 23. The positioning boss 27 is provided with a threaded hole. The connecting bolt 26 passes through the cover mold 21 from the outside to the inside and engages with the threaded hole to fix the upper liner box 23 in the preset position of the cover mold 21. After the mold is closed, the upper liner box 23 and the lower liner box 24 are close together and are symmetrical about the horizontal center plane of the mold 2, so that the upper liner box 23 and the lower liner box 24 are used together to construct the groove 115 of the pile body 11. The mold closing bolt 5 and nut 6 can be tightened at the tongue and groove flange 25 of the cover mold 21 and the bottom mold 22 by using a multi-head pneumatic wrench.

[0073] S5. The prestressed steel bars 12 are prestressed using a tensioning device according to the set control values. After prestressing is completed, the mold 2 is hoisted onto a centrifuge using a hoisting device, allowing the pile body 11 to be centrifuged and formed. During the centrifugal forming process, if... Figure 1 and Figure 8 As shown, the concrete material is subjected to centrifugal force to form the central hole 111 of the pile body 11. The upper liner box 23 and the lower liner box 24 together gradually form the groove 115 of the support pile 1. The inner contours of the cover mold 21 and the bottom mold 22 gradually form the support surface 113 and the tenon 114 of the support pile 1.

[0074] S6. After centrifugal molding is completed, pour out the excess concrete slurry and move the mold 2 as a whole to the curing site for steam curing of the pile 11 with the mold on until the support pile 1 reaches the demolding strength.

[0075] S7. After curing, move mold 2 out of the curing site, first release the prestressed steel bars 12, and then remove the connecting bolts 26 on the cover mold 21 and bottom mold 22 respectively used for the upper liner box 23 and lower liner box 24. Loosen the mold closing bolts 5 and nuts 6 at the tongue and groove flange 25, remove the cover mold 21 from the bottom mold 22, lift the precast pile out from the bottom mold 22, remove the upper liner box 23 and lower liner box 24 attached to the pile, and the finished pile can be obtained.

[0076] Preferably, in step S5, the mold 2 is located on the centrifuge to perform the centrifugal process of the pile body 11. The centrifugal process mainly consists of four stages: low-speed centrifugation, medium-low-speed centrifugation, medium-high-speed centrifugation, and high-speed centrifugation. It can be understood that the speed of the centrifuge has a great influence on the strength of the support pile 1 in the centrifugal process. After demonstration, it is found that the low-speed centrifugation stage mainly makes the concrete material uniformly distributed in the length direction of the support pile 1, and also makes the part of the concrete material that is pressed to death during the mold closing process loose, thereby avoiding the honeycomb phenomenon of the concrete material after molding. The medium-low-speed centrifugation stage mainly makes the concrete material further uniformly distributed, activates the concrete material that appears to be "false setting", and also avoids the concrete material from being coagulated due to long-term low-speed centrifugation, thereby affecting the subsequent centrifugal process. The medium-high-speed centrifugation stage mainly removes the water in the concrete material through the action of centrifugal force and reduces the internal and external layering phenomenon of the concrete. The high-speed centrifugation stage mainly makes the various suspension systems of the concrete material fully settle, thereby improving the compactness and impermeability of the concrete material. The support pile 1 formed by the four stages of low-speed centrifugation, medium-low-speed centrifugation, medium-high-speed centrifugation, and high-speed centrifugation has high compactness, strong impermeability, and high strength.

[0077] The application provides a row support system, as shown in Figure 11 The application provides a row support system, as shown in Figure 12 and Figure 13 The application provides a row support system, as shown in

[0078] The application provides a row support system, as shown in

[0079] (1) Calculate the number of self-locking support piles required according to the total length of the row support system and the width of the support surface of the self-locking support pile, and transport the corresponding number of self-locking support piles to the construction site; specifically, in order to avoid the situation that the overall number is insufficient due to the damage of a number of support piles during construction, the number of support piles actually transported to the construction site should be more than the calculated number of support piles to a certain extent.

[0080] (2) Gradually press the first support pile downward at the preset position through the pile pressing equipment, continuously correct the vertical deviation during the downward pressing process to ensure the perpendicularity of the first support pile, and press the first support pile to the preset depth; specifically, when the construction of the first support pile is completed, the overall extension direction of the row support system is limited.

[0081] (3) vertically hoist the second support pile through the hoisting equipment, make the bottom end of the second support pile higher than the top end of the first support pile, align the tenon of the second support pile with the groove of the first support pile or align the groove of the second support pile with the tenon of the first support pile according to the row direction of the row support system, and lower the second support pile through the hoisting equipment, so that the tenon of the second support pile slides into the groove of the first support pile from top to bottom or the tenon of the first support pile slides into the groove of the second support pile from bottom to top, and then gradually press the second support pile downward through the pile pressing equipment until the second support pile is pressed to the same height as the first support pile.

[0082] (4) sequentially press the remaining support piles according to the construction mode of the second support pile; specifically, the first support pile can be the support pile at the end of the row support system or the support pile in the middle of the row support system, if the first support pile is the support pile at the end of the row support system, the remaining support piles can be sequentially pressed in the row direction according to the second, third, etc.; if the first support pile is the support pile in the middle of the row support system, the two opposite directions can be constructed simultaneously under the condition that the site conditions permit, that is, the tenon of the first support pile can cooperate with the groove of the second support pile, and at the same time, the groove of the first support pile can cooperate with the tenon of the third support pile. This kind of bidirectional construction method helps to speed up the construction progress and improve the construction efficiency.

[0083] The places not mentioned in the present application can be realized by adopting or referring to the existing technology.

[0084] Each embodiment in the specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other, and each embodiment mainly describes the difference from other embodiments.

[0085] The above merely provides an example of the present application, but is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application should be included in the scope of claims of the present application.

Claims

1. A method of manufacturing a self-locking type support pile, characterized by, The supporting pile comprises a pile body formed by concrete pouring and a steel reinforcement cage embedded in the pile body, a central hole is arranged in the middle of the pile body, first and second connecting surfaces are respectively arranged on the opposite sides of the pile body, the first and second connecting surfaces are connected by a supporting surface, the first connecting surface is provided with a protruding tenon, the second connecting surface is provided with a recessed groove, and the tenon and the groove respectively extend along the axial direction of the central hole; The tenon and the groove structure are matched with each other, and the tenon of one pile body can be slidably connected with the groove of another pile body along the axial direction of the central hole and is limited to move in other directions except the axial direction of the central hole by the groove; The manufacturing method comprises the following steps: S1, a steel reinforcement cage formed by connecting prestressed steel bars and stirrups is manufactured, the end of the prestressed steel bar is connected with a steel sleeve, and the steel reinforcement cage and a mold are hoisted to a work site, wherein the mold comprises a cover mold, a bottom mold, an upper lining box and a lower lining box, the upper lining box and the lower lining box have the same structure and size, the cover mold and the bottom mold are provided with tongue and groove flanges, so that when the upper lining box and the lower lining box are respectively installed in the cover mold and the bottom mold according to preset positions and the cover mold and the bottom mold are closed, a pile body forming space matching the outer contour of the self-locking supporting pile can be obtained; S2, the bottom mold is placed on the ground, the lower lining box is detachably installed in the bottom mold according to the preset position through connecting bolts, the inner wall of the bottom mold and the lower lining box are entirely brushed with a release agent, the prepared steel reinforcement cage is placed in the bottom mold, and then the end of the prestressed steel bar of the steel reinforcement cage is connected with a tension screw on a tension anchoring plate through the connecting sleeve; S3, the concrete material prepared according to the design strength requirement and the mixing ratio is quantitatively and uniformly arranged in the bottom mold; S4, the upper lining box is detachably fixed in the cover mold according to the preset position through connecting bolts, the inner wall of the cover mold and the upper lining box are entirely brushed with a release agent, and then the cover mold and the bottom mold are closed through the cooperation of the closing bolts and the nuts, at this time, the upper lining box and the lower lining box are tightly attached and symmetric about the horizontal center plane of the mold; S5, the prestressed steel bar is prestressed and tensioned through a tensioning device according to a set control value, after the prestressed tensioning is completed, the mold is hoisted as a whole on a centrifugal machine by a hoisting device, so that the pile body is formed by centrifugation on the centrifugal machine, during the centrifugal forming, the central hole of the pile body is formed by the centrifugal force of the concrete material, the upper lining box and the lower lining box are gradually formed together to form the groove of the supporting pile, and the inner contour of the cover mold and the bottom mold is gradually formed to form the supporting surface and the tenon of the supporting pile; S6, after the centrifugal forming is completed, the generated concrete surplus is poured out, and the mold is hoisted as a whole to a curing site to perform steam curing of the pile body with the mold until the supporting pile reaches the demolding strength; S7, after the curing is completed, the mold is hoisted out of the curing site, the prestressed steel bar is first released, the closing bolts are loosened after the release, the connecting bolts for fixing the upper lining box and the lower lining box on the cover mold and the bottom mold are removed, the cover mold is detached from the bottom mold, the prefabricated pile is taken out from the bottom mold, and the upper lining box and the lower lining box adhered to the pile are removed to obtain the finished pile.

2. The method according to claim 1, wherein the tenon and the groove are configured in dovetail shape, and the taper angle of the tenon is between 45-70°.

3. The method according to claim 2, wherein the outer side surface of the tenon is connected with the first connecting surface through a first arc surface, and the inner side surface of the groove is connected with the second connecting surface through a second arc surface, the cooperation of the first arc surface and the second arc surface guides the relative sliding of the tenon and the groove, and limits the movement of the tenon in directions other than the axial direction of the central hole.

4. The method according to claim 1, wherein the reinforcement cage comprises a plurality of prestressed steel bars, the prestressed steel bars extend along the axial direction of the pile body, and the plurality of prestressed steel bars are arranged around the outer periphery of the central hole, the top end of the pile body is provided with a counterbore corresponding to the top of the prestressed steel bars, and a connecting sleeve connected with the prestressed steel bars is installed in the counterbore.

5. The method according to claim 4, wherein the length of the connecting sleeve is less than the length of the counterbore, so that the connecting sleeve is entirely hidden in the counterbore, and the end surface of the connecting sleeve is lower than the top surface of the pile body by more than 45mm.

6. The method according to claim 1, wherein the mold is located on a centrifuge for centrifugal forming of the pile body, and the centrifugal process mainly comprises four stages of low-speed centrifugation, medium-low-speed centrifugation, medium-high-speed centrifugation and high-speed centrifugation. ​ ​ ​ ​ ​

Images