Connecting joint of prefabricated pile and prefabricated stand column and construction method of connecting joint

Abstract

The invention provides a connecting joint of a prefabricated pile and a prefabricated stand column and a construction method of the connecting joint. The connecting joint of the prefabricated pile and the prefabricated stand column comprises a pile body, a column body and a connecting unit. A top end plate of the pile body is connected with the bottom of the column body in a welded mode, the pile body and the column body are connected in an anchoring mode through a connecting unit, and the connecting unit comprises a reinforcement cage and / or anchoring parts and filler. Wherein the interior of the column body and the interior of the pile body can be used for containing filler, the filler at least fills the position where a connecting unit in the pile body and the interior of the column body is located, and the column body can be a steel pipe column or a prefabricated hollow concrete steel pipe column. According to the configuration, by arranging the reinforcement cage and / or the anchoring part, the structure of an existing connecting joint can be optimized, for example, arrangement of mechanical connectors is reduced, the working procedure is simplified, the production cost is reduced, operation is simpler and faster, and meanwhile reliable connection of the prefabricated pile and the prefabricated stand column is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of civil engineering construction, in particular to a connection node between a prefabricated pile and a prefabricated column and a construction method thereof. Background Art

[0002] The existing connection nodes between precast piles and precast columns can meet the force requirements of the foundation pit engineering column system and solve the force problem of the column system, but all connections and forces rely on the end plates of the precast piles to bear and transmit, and the force is too concentrated; at the same time, it was found in engineering tests and engineering applications that the production and construction of these connection nodes are relatively complicated, with many construction processes and high project costs.

[0003] Based on this, how to simplify the connection nodes to make the construction more convenient and the cost lower has become a technical problem that technical personnel in this field need to solve. Summary of the invention

[0004] The purpose of the present invention is to provide a connection node between a precast pile and a precast column and a construction method thereof, so as to solve the problems that the existing connection node is only subjected to force at the end plate of the precast pile, is complicated to manufacture, has many construction steps and has high engineering cost.

[0005] In order to achieve the above-mentioned object, the present invention provides a connection node between a prefabricated pile and a prefabricated column, comprising: a pile body, a column body and a connection unit;

[0006] The top end plate of the pile body is welded to the bottom of the column body, and the pile body is anchored to the column body through the connection unit, wherein the connection unit includes a steel cage and / or an anchor, and a filler;

[0007] The steel cage is partially located inside the pile body and partially located inside the column body, and the filler is at least filled in the portion of the steel cage located inside the pile body and the portion of the steel cage located inside the column body.

[0008] Optionally, the connection unit includes the steel cage and the filler;

[0009] The steel cage is arranged along the axial direction of the pile body, with one end located inside the pile body and the other end located inside the column body.

[0010] Optionally, the steel cage is connected to the top end plate of the pile body, and the steel cage further comprises a support plate; the support plate is arranged at one end located inside the pile body, the diameter of the support plate is adapted to the inner diameter of the pile body, and the filler fills the column body and the part of the pile body located above the support plate;

[0011] or,

[0012] The steel cage includes elongated steel bars, which extend from the bottom of the steel cage along the axial direction of the pile body and are connected to the bottom of the pile body. The filler fills the column body and the interior of the pile body.

[0013] Optionally, the column body includes a precast hollow concrete steel pipe pile column, the precast hollow concrete steel pipe pile column is coaxially arranged with the pile body, and the outer diameter of the precast hollow concrete steel pipe pile column is matched with the outer diameter of the pile body.

[0014] Optionally, the connection unit includes the steel cage, the anchor and the filler;

[0015] The steel cage is arranged along the axial direction of the pile body, with one end located inside the pile body and the other end located inside the column body;

[0016] The anchor is arranged at the connection portion between the pile body and the column body, and one end is connected to the top end plate of the pile body, and the other end is anchored in the filler inside the column body.

[0017] Optionally, the anchor is arranged along the axial direction of the pile body.

[0018] Optionally, the column body includes a steel pipe, the steel pipe is coaxially arranged with the pile body, and the outer diameter of the steel pipe is matched with the outer diameter of the pile body.

[0019] In order to achieve the above object, the present invention also provides a construction method for a connection node between a prefabricated pile and a prefabricated column, which is used to realize the connection node between the prefabricated pile and the prefabricated column as described above, comprising:

[0020] Sinking the pile body to a preset elevation;

[0021] The steel cage is installed inside the pile body, and the steel cage is connected and fixed to the top end plate of the pile body;

[0022] Welding the bottom of the column body to the top end plate of the pile body;

[0023] After the column body and the pile body are connected, they are sunk together to the preset elevation, and a temporary sealing plate is arranged on the top of the column body, and then they are sunk together to the designed elevation;

[0024] After the earthwork is excavated to expose the top of the column body, the temporary sealing plate provided on the top of the column body is removed, and the filler is poured into the interior of the column body and the interior of the pile body.

[0025] In order to achieve the above object, the present invention also provides a construction method for a connection node between a prefabricated pile and a prefabricated column, which is used to realize the connection node between the prefabricated pile and the prefabricated column as described above, comprising:

[0026] Sinking the pile body to a preset elevation;

[0027] The steel cage is installed inside the pile body, the steel cage is connected and fixed to the top end plate of the pile body; and the anchor is arranged on the top end plate of the pile body;

[0028] Welding the bottom of the column body to the top end plate of the pile body;

[0029] After the column body and the pile body are connected, they are sunk together to the preset elevation, and a temporary sealing plate is arranged on the top of the column body, and then they are sunk together to the designed elevation;

[0030] After the earthwork is excavated to expose the top of the column body, the temporary sealing plate provided on the top of the column body is removed, and the filler is poured into the interior of the column body and the interior of the pile body.

[0031] In order to achieve the above object, the present invention also provides a construction method for a connection node between a prefabricated pile and a prefabricated column, which is used to realize the connection node between the prefabricated pile and the prefabricated column as described above, comprising:

[0032] Installing an anchor on the top end plate of the pile body;

[0033] The top end plate of the pile body described in the last section is welded to the bottom of the column body;

[0034] Install the steel cage inside the pile body;

[0035] Pouring filler into the interior of the column body and the interior of the last section of the pile body;

[0036] Sinking the remaining pile bodies located at the bottom to a preset elevation;

[0037] The assembly formed by the column body and the last section of the pile body is hoisted and connected with the remaining pile bodies located at the lower part that have sunk to the preset elevation to form a prefabricated column pile;

[0038] The prefabricated column piles are sunk to the designed elevation.

[0039] Compared with the existing connection nodes between prefabricated piles and prefabricated columns, the connection nodes between prefabricated piles and prefabricated columns provided in the present application have the following advantages:

[0040] The connection node between the precast pile and the precast column provided in the present application is achieved by welding the top end plate of the pile body to the bottom of the column body, and by setting a steel cage and / or anchoring pieces and pouring core concrete to achieve an anchor connection between the pile body and the column body, thereby achieving a synergistic effect of the two connection methods of welding and anchoring, and ensuring the reliability of the connection node; at the same time, the existing connection node between the precast pile and the precast column, by setting a sealing plate at the connection position of the precast pile and the column, and passing the anchor bolts through the sealing plate, although partial anchoring is achieved, the force points are relatively concentrated on the precast pile end plate. Compared with the existing technology, the connection node provided in this embodiment can reduce the setting of mechanical joints, simplify the process, reduce production costs, make the operation simpler and faster, and at the same time make the force reliability of the connection node between the precast pile and the precast column higher.

[0041] The construction method of the connection node between the precast pile and the precast column provided in the present application is achieved by setting a steel cage and / or anchors and pouring concrete. The pouring concrete covers the joint between the precast pile and the column, and the force is more reliable. At the same time, the steel cage is installed inside the pile body, and / or the anchors and the sealing plates are installed on the top end plate of the pile body, which simplifies the construction process and reduces the construction difficulty. In addition, the use of connection units instead of anchor bolts and mechanical heads also reduces the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic structural diagram of a connection node between a first precast pile and a precast column provided in an embodiment of the present invention;

[0043] Figure 2 A schematic structural diagram of a second connection node between a prefabricated pile and a prefabricated column provided in an embodiment of the present invention;

[0044] Figure 3 A schematic structural diagram of a third connection node between a prefabricated pile and a prefabricated column provided in an embodiment of the present invention;

[0045] Figure 4 A flowchart of a construction method for a first connection node between a precast pile and a precast column provided by an embodiment of the present invention;

[0046] Figure 5 A schematic diagram of step S1 in a first method for constructing a connection node between a precast pile and a precast column provided in an embodiment of the present invention;

[0047] Figure 6 A schematic diagram of step S2 in a first method for constructing a connection node between a precast pile and a precast column provided in an embodiment of the present invention;

[0048] Figure 7A schematic diagram of step S3 in the first method for constructing a connection node between a precast pile and a precast column provided in an embodiment of the present invention;

[0049] Figure 8 A schematic diagram of step S4 in a first method for constructing a connection node between a precast pile and a precast column provided in an embodiment of the present invention;

[0050] Fig. 9 A schematic diagram of step S5 in the first method for constructing a connection node between a precast pile and a precast column provided in an embodiment of the present invention;

[0051] Fig.10 A flowchart of a construction method for a second connection node between a precast pile and a precast column provided by an embodiment of the present invention;

[0052] Fig.11 A schematic diagram of steps S10 to S40 in a second method for constructing a connection node between a precast pile and a precast column provided by an embodiment of the present invention;

[0053] Fig.12 A schematic diagram of step S50 in the second method for constructing a connection node between a precast pile and a precast column provided by an embodiment of the present invention;

[0054] Fig.13 A schematic diagram of step S60 in the second method for constructing a connection node between a precast pile and a precast column provided by an embodiment of the present invention;

[0055] Fig.14 A schematic diagram of step S70 in the second method for constructing a connection node between a precast pile and a precast column provided in an embodiment of the present invention.

[0056] The description of each reference numeral is as follows:

[0057] 10-pile body; 101-top end plate;

[0058] 20-column body;

[0059] 30-connection unit; 301-reinforcement cage; 302-anchor; 303-sealing plate; 304-temporary sealing plate; 3011-longitudinal main reinforcement; 3012-annular stirrups; 3013-support plate; 3014-elongated reinforcement;

[0060] 40-filler;

[0061] X is the axial direction of the pile body; Y is the radial direction of the pile body. DETAILED DESCRIPTION

[0062] In order to make the purpose, advantages and features of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In addition, the structure shown in the drawings is often a part of the actual structure. In particular, the emphasis of each drawing is different, and sometimes different scales are used.

[0063] As used in this specification, the singular forms "a", "an" and "the" include plural objects, the term "or" is generally used to include the meaning of "and / or", the term "several" is generally used to include the meaning of "at least one", and the term "at least two" is generally used to include the meaning of "two or more". In addition, the terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" and "third" may explicitly or implicitly include one or at least two of the features, "one end" and "the other end" and "the proximal end" and "the distal end" generally refer to two corresponding parts, which include not only the endpoints, and the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. In addition, as used in this specification, an element disposed on another element generally only indicates that there is a connection, coupling, cooperation or transmission relationship between the two elements, and the connection, coupling, cooperation or transmission between the two elements may be direct or indirect through an intermediate element, and it cannot be understood as indicating or implying the spatial position relationship between the two elements, that is, one element may be in any orientation such as inside, outside, above, below or on one side of another element, unless the content clearly indicates otherwise. The terms "upper", "lower", "top" and "bottom" are generally relative position relationships arranged in the direction of gravity; the terms "vertical, vertical direction" generally refer to the direction of gravity, which is generally perpendicular to the ground, and "horizontal, horizontal plane direction" generally refers to the direction parallel to the ground; for ordinary technicians in this field, the specific meanings of the above terms in this specification can be understood according to specific circumstances.

[0064] The object of the present invention is to provide a connection node between a prefabricated pile and a prefabricated column and a construction method thereof, so as to solve the problems of complex manufacturing of the existing connection node, multiple construction steps and high engineering cost.

[0065] In the existing connection nodes between prefabricated piles and steel pipe columns, a sealing plate is provided at the bottom of the column, and anchor holes and connection holes are provided on the sealing plate. Anchor bolts are inserted into the anchor holes, and the anchor connection between the column and the prefabricated pile is achieved in combination with fillers. At the same time, fasteners are inserted into the connection holes and used in conjunction with mechanical joints to improve the tensile performance of the connection joint. At the same time, the sealing plate is welded to the top end plate of the prefabricated pile, so that the connection joint has both compression resistance, shear resistance and tensile resistance. However, during the use of the above-mentioned connection node, the end plate often deforms during welding, and the mechanical joint is often affected by excessive pressure. Assembly is affected. Based on this, the present application provides a connection node between a prefabricated pile and a prefabricated column, which can simplify the existing connection node, reduce the construction process, and also reduce the project cost.

[0066] The following description is given with reference to the accompanying drawings.

[0067] Please refer to Figures 1 to 3 The present invention provides a connection node between a precast pile and a precast column, comprising: a pile body 10, a column body 20 and a connection unit 30; the top end plate 101 of the pile body 10 is welded to the bottom of the column body 20, and the pile body 10 and the column body 20 are anchored and connected through the connection unit 30, wherein the connection unit 30 comprises a steel cage 301 and / or an anchor 302, and a filler 40; wherein the steel cage 301 is partially located inside the pile body 10 and partially located inside the column body 20, and the filler 40 is at least filled in the part of the steel cage 301 located inside the pile body 10 and the part of the steel cage 301 located inside the column body. It should be noted that the filler 40 can be concrete, which is anchored to the steel cage 301, and the bonding effect of the concrete itself can further improve the bearing capacity of the connection node. With such configuration, this embodiment achieves the synergistic effect of the two connection methods by directly welding the top end plate 101 of the pile body 10 to the bottom of the column body 20. At the same time, the pile body 10 and the column body 20 are connected by a connection unit 30, and a core-cast steel cage 301 is combined with a welding connection to ensure the reliability of the connection node. Compared with the prior art, the use of mechanical joints is reduced, the construction process is simplified, and the production cost is reduced.

[0068] Furthermore, regarding the connection unit 30, this embodiment provides three configuration schemes.

[0069] The first option: Please refer to Figure 1, the connection unit 30 only includes a steel cage 301 and a filler 40; the steel cage 301 includes a longitudinal main bar 3011 and an annular hoop 3012, and the steel cage 301 is arranged along the axial direction X of the pile body, one end of which is located inside the pile body 10, and the other end of which is located inside the column body 20. Further, the steel cage 301 is connected to the top end plate 101 of the pile body 10 to limit the axial position of the steel cage 301. As an optional embodiment, a limiting member (not shown in the figure) is arranged on the top end plate 101 of the pile body 10, and the limiting member extends inward along the radial direction Y of the pile body, and the steel cage 301 extends into the interior of the pile body 10 along the axial direction X of the pile body, and the side wall of the steel cage 301 is engaged with the limiting member. Further, the steel cage 301 also includes a support plate 3013; the support plate 3013 is arranged at one end of the steel cage 301 located inside the pile body 10, and the diameter of the support plate 3013 is adapted to the inner diameter of the pile body 10. Those skilled in the art can understand that the steel cage 301 is a complete grid-like component formed by combining steel bars, which is conducive to constraining concrete, improving the integrity of concrete components, and enabling it to withstand a certain horizontal force. The compressive bearing capacity of concrete is very high, but the tensile bearing capacity is low. The steel cage 301 can play a tensile role like the longitudinal bars of the column. After pouring concrete, the connection unit 30 forms a solid cross-section, which further improves the bearing performance of the connection node. It should be noted that the longitudinal main reinforcement 3011 is arranged along the axial direction X of the pile body, and the annular hoop reinforcement 3012 is arranged along the circumferential direction of the pile body. In addition to filling the position where the steel cage 301 is located, the filler 40 can also continue to fill a distance upward inside the column body 20 to improve the bonding effect between the steel cage 301 and the filler 40, thereby improving the bearing capacity of the connection node. As a preferred embodiment, the column body 20 includes a precast hollow concrete steel pipe pile column, which is coaxially arranged with the pile body 10, and the outer diameter of the precast hollow concrete steel pipe pile column is adapted to the outer diameter of the pile body. exist Figure 1 In the illustrated example, the inner diameter of the precast hollow concrete steel pipe pile column is matched with the inner diameter of the pile body 10. In other embodiments, the inner diameter of the precast hollow concrete steel pipe pile column may also be larger or smaller than the inner diameter of the pile body 10. Those skilled in the art may configure this according to actual conditions. With such configuration, the wall thickness of the precast hollow concrete steel pipe pile column is increased, further improving the bearing capacity of the column body 20. Compared with the connection nodes in the prior art, this solution can take into account the compression, tension and shearing requirements by replacing anchor bolts and mechanical joints with steel cage 301 and core concrete, and simplifies the structure of the connection node, optimizes the construction process, and reduces the construction cost.

[0070] The second option: Please refer to Figure 2 and Fig.11The connection unit 30 includes a steel cage 301, an anchor 302 and a filler 40; the steel cage 301 includes a longitudinal main reinforcement 3011 and an annular hoop reinforcement 3012, the steel cage 301 is arranged along the axial direction X of the pile body, one end of which is located inside the pile body 10, and the other end of which is located inside the column body 20; the anchor 302 is arranged at the connection portion between the pile body 10 and the column body 20, and one end is connected to the top end plate 101 of the pile body 10, and the other end is anchored in the filler 40 inside the column body 20. Further, the column body 20 includes a steel pipe, which is coaxially arranged with the pile body 10, and the outer diameter of the steel pipe is adapted to the outer diameter of the pile body 10. Figure 2 In the embodiment, the inner diameter of the steel tube is larger than the inner diameter of the pile body 10. In other embodiments, concrete may be poured into the steel tube to form a solid steel tube concrete column. Those skilled in the art may configure this according to actual conditions. Figure 2 In the illustrated example, the extension direction of the anchor 302 is parallel to the axial direction X of the pile body. A support plate 3013 is also provided at one end of the steel cage 301 located inside the pile body 10. The diameter of the support plate 3013 matches the inner diameter of the pile body 10. After being placed inside the pile body 10, it can prevent the filler 40 from filling the entire pile body 10. On the one hand, the filler 40 is filled inside the column body 20 and the part of the steel cage 301 extending into the pile body 10 to meet the bearing requirements of the connection node; on the other hand, the existing construction method usually divides the pile body 10 into several sections, and the steel cage 301 is only placed inside the last section of the pile body 10. Therefore, not providing the support plate 3013 will also cause a waste of the filler 40, increasing the construction cost. Fig.11 In the illustrated example, the steel cage 301 includes an elongated steel bar 3014, which extends from the bottom of the steel cage 301 along the axial direction X of the pile body and is connected to the bottom of the pile body 10. In this embodiment, the bottom of the steel cage 301 may not be provided with a support plate 3013, but only a temporary sealing plate 304 may be provided at the bottom of the pile body 10. The anchor 302 is connected to the top end plate 101 of the pile body 10. This solution can reduce the setting of the bottom end plate of the column body 20 and avoid the problem of the deformation of the end plate affecting the quality; at the same time, the pile body 10 and the column body 20 are connected by the connection unit 30, and the anchor connection is realized by setting the core steel cage 301, the anchor 302 and the filler 40. The synergistic effect of the two connection methods is realized by combining the welding connection, which ensures the reliability of the connection node. Compared with the prior art, the use of end plates and mechanical joints is reduced, the construction process is simplified, and the production cost is reduced.

[0071] The third option: Please refer to Figure 3The connection unit 30 includes an anchor 302 and a filler 40; the anchor 302 is disposed at the connection between the pile body 10 and the column body 20, and one end is connected to the top end plate 101 of the pile body 10, and the other end is anchored in the filler 40. Further, the connection unit 30 also includes a sealing plate 303; the sealing plate 303 is disposed at the connection between the pile body 10 and the column body 20, and is connected to the top end plate 101 of the pile body 10. Furthermore, the filler 40 is filled in the interior of the column body 20. It should be noted that in Figure 3 In the illustrated example, the extension direction of the anchor 302 is set parallel to the axial direction X of the pile body. In other embodiments, the extension direction of the anchor 302 can also be set at an angle to the axial direction X of the pile body. Those skilled in the art can configure this according to actual conditions. At the same time, one end of the anchor 302 is installed on the top end plate 101 of the pile body 10; the sealing plate 303 is welded to the top end plate 101 of the pile body 10. Compared with the connection node in the prior art, this solution installs the anchor 302 and the sealing plate 303 on the top end plate 101 of the pile body 10, cancels the end sealing plate and mechanical joint below the column body 20, simplifies the connection node, reduces the construction difficulty, and reduces the production cost.

[0072] In another embodiment, please refer to Figures 4 to 9 The present invention also provides a construction method for a connection node between a prefabricated pile and a prefabricated column, which is used to realize the connection node between the prefabricated pile and the prefabricated column as above, comprising:

[0073] Step S1: Sink the pile body 10 to a preset elevation (see Figure 5 );

[0074] Step S2: Install the steel cage 301 inside the pile body 10 and connect it to the top end plate 101 of the pile body 10; if necessary, an anchor 302 may be provided on the top end plate 101 of the pile body 10 (see Figure 6 );

[0075] Step S3: Weld the bottom of the column body 20 to the top end plate 101 of the pile body 10 (see Figure 7 );

[0076] Step S4: After the pile body 10 and the column body 20 are connected, they are sunk together to a preset elevation, and a temporary sealing plate (not shown in the figure) is set on the top of the column body 20, and then sunk together to a preset elevation (please refer to Figure 8 );

[0077] Step S5: After the excavation is completed to expose the top of the column body 20, the temporary sealing plate provided on the top of the column body 20 is removed, and the filler 40 is poured into the interior of the column body 20 and the interior of the pile body 10 (see Fig. 9 ).

[0078] It should be noted that Figures 5 to 9 In the illustrated example, the connection unit 30 includes a steel cage 301 and an anchor 302. In other embodiments, the connection unit 30 may also include only the steel cage 301 or the anchor 302, which is not limited in this embodiment. In step S1 and step S4, the preset elevation is near the ground; the temporary sealing plate is set so that the steel cage and the anchor will not be affected by other materials during the pile sinking process. In step S2, it can be determined whether to set the anchor 302 on the top end plate 101 of the pile body 10 according to the design requirements and the actual bearing capacity requirements. Figure 6 The situation shown in FIG. 4 is that the steel cage and the anchor are set at the same time. In step S5, the filler 40 can be concrete.

[0079] With such configuration, by setting the steel cage 301 and / or the anchor 302, the setting of the bottom end plate of the column body 20 is reduced, thereby avoiding the problem of deformation of the bottom end plate due to large force during welding, which affects the construction quality; at the same time, the steel cage 301 is installed inside the pile body 10, and / or the anchor 302 and the sealing plate 303 are both installed on the top end plate 101 of the pile body 10, which simplifies the construction process and reduces the construction difficulty; in addition, the use of the connection unit 30 instead of the anchor bolts and the mechanical head also reduces the construction cost.

[0080] In another embodiment, please refer to Figures 10 to 14 The present invention also provides a construction method for a connection node between a prefabricated pile and a prefabricated column, which is used to realize the connection node between the prefabricated pile and the prefabricated column as above, comprising:

[0081] Step S10: installing the anchor 302 on the top end plate of the pile body 10;

[0082] Step S20: welding the top end plate of the last section of the pile body 10 to the bottom of the column body 20;

[0083] Step S30: installing the steel cage 301 inside the pile body 10;

[0084] Step S40: pouring filler 40 (such as Fig.11 shown);

[0085] Step S50: sink the remaining pile bodies 10 located at the bottom to a preset elevation (such as Fig.12 shown);

[0086] Step S60: hoist the assembly formed by the column body 20 and the last section of the pile body 10, and connect it with the remaining pile bodies 10 located below that have sunk to the preset elevation to form a prefabricated column pile (such as Fig.13 shown);

[0087] Step S70: sink the prefabricated column piles to the designed elevation (such as Fig.14 shown).

[0088] It should be noted that Figures 11 to 14 In the example shown, in step S10 to step S40, please refer to Fig.11 , the connection unit 30 includes: a steel cage 301 arranged inside the pile body 10, and a shear anchor bolt (equivalent to the anchor 302 in the aforementioned embodiment) arranged on the top end plate of the pile body 10, and at the same time, a filler 40 (the filler 40 may be concrete) is poured into the interior of the column body 20 and the interior of the pile body 10, and a temporary sealing plate 304 is installed at the bottom of the last section of the pile body 10 to achieve the bearing of the filler 40. Among them, the order of step S10 and step S30 is not limited, that is, the steel cage 301 may be installed first, or the anchor 302 may be installed first, and at the same time, the process of welding the top end plate of the last section of the pile body 10 to the bottom of the column body 20 may be before installing the steel cage 301, or it may be after installing the steel cage 301. For example, in Figure 2 In the example shown, the steel cage 301 includes a support plate 3013, and the steel cage 301 needs to be installed inside the pile body 10 first, and then the top end plate of the last section of the pile body 10 is welded to the bottom of the column body 20; Fig.11 In the illustrated example, the steel cage 301 includes the elongated steel bars 3014. The top end plate of the last section of the pile body 10 may be welded to the bottom of the column body 20, and then the steel cage 301 may be installed inside the pile body 10 from the bottom of the pile body 10 until the elongated steel bars 3014 are connected to the bottom of the pile body 10. In step S50, please refer to Fig.12 , sink the remaining pile bodies 10 located at the bottom until the pile top is 1.0m to 1.5m above the ground; in step S60, please refer to Fig.13 The assembly formed by the column body 20 and the last section of the pile body 10 is hoisted and welded to the remaining pile bodies 10 located at the bottom that have sunk to the preset elevation to form a complete prefabricated column pile.

[0089] With such configuration, by setting the steel cage 301 and / or the anchor 302, the setting of the bottom end plate of the column body 20 is reduced, thereby avoiding the problem of deformation of the bottom end plate due to large force during welding, which affects the construction quality; at the same time, the steel cage 301 is installed inside the pile body 10, and / or the anchor 302 and the sealing plate 303 are both installed on the top end plate 101 of the pile body 10, which simplifies the construction process and reduces the construction difficulty.

[0090] In summary, in a connection node between a prefabricated pile and a prefabricated column and a construction method thereof provided in an embodiment of the present invention, the connection node between the prefabricated pile and the prefabricated column includes: a pile body, a column body and a connection unit; the top end plate of the pile body is welded to the bottom of the column body, and the pile body and the column body are anchored and connected by the connection unit, wherein the connection unit includes a steel cage and a filler; wherein the steel cage is partially located inside the pile body and partially located inside the column body, and the filler is filled in at least the part of the steel cage located inside the pile body and the part of the steel cage located inside the column body.

[0091] With such configuration, the connection node between the precast pile and the precast column provided in the present application is achieved by welding the top end plate of the pile body to the bottom of the column body, and by setting a steel cage and / or anchoring pieces and pouring core concrete to achieve an anchor connection between the pile body and the column body, thereby achieving a synergistic effect of the two connection methods of welding and anchoring, and ensuring the reliability of the connection node; at the same time, the existing connection node between the precast pile and the precast column, by setting a sealing plate at the connection position of the precast pile and the column, and passing the anchor bolts through the sealing plate, although partial anchoring is achieved, the force points are relatively concentrated on the precast pile end plate. Compared with the existing technology, the connection node provided in this embodiment can reduce the setting of mechanical joints, simplify the process, reduce production costs, make the operation simpler and faster, and at the same time make the force reliability of the connection node between the precast pile and the precast column higher.

[0092] Furthermore, the construction method of the connection node between the precast pile and the precast column provided in the present application is achieved by setting a steel cage and / or anchors and pouring concrete. The pouring concrete covers the joint between the precast pile and the column, making the force more reliable. At the same time, the steel cage is installed inside the pile body, and / or the anchors and the sealing plates are installed on the top end plate of the pile body, which simplifies the construction process and reduces the construction difficulty. In addition, the use of connection units instead of anchor bolts and mechanical heads also reduces the construction cost.

[0093] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A connection node between a prefabricated pile and a prefabricated column, characterized in that: include: Pile body, column body and connection unit; The top end plate of the pile body is welded to the bottom of the column body, and the pile body is anchored to the column body through the connection unit, wherein the connection unit includes a steel cage and / or an anchor, and a filler; The steel cage is partially located inside the pile body and partially located inside the column body, and the filler is at least filled in the portion of the steel cage located inside the pile body and the portion of the steel cage located inside the column body.

2. The connection node between the precast pile and the precast column according to claim 1, characterized in that: The connecting unit includes the steel cage and / or anchor, and the filler; The steel cage is arranged along the axial direction of the pile body, with one end located inside the pile body and the other end located inside the column body.

3. The connection node between the precast pile and the precast column according to claim 2, characterized in that: The steel cage is connected to the top end plate of the pile body, and the steel cage further comprises a support plate; the support plate is arranged at one end of the steel cage located inside the pile body, the diameter of the support plate is adapted to the inner diameter of the pile body, and the filler fills the column body and the part of the pile body located above the support plate; or, The steel cage includes elongated steel bars, which extend from the bottom of the steel cage along the axial direction of the pile body and are connected to the bottom of the pile body. The filler fills the column body and the interior of the pile body.

4. The connection node between the precast pile and the precast column according to claim 2, characterized in that: The column body comprises a prefabricated hollow concrete steel pipe pile column, the prefabricated hollow concrete steel pipe pile column is coaxially arranged with the pile body, and the outer diameter of the prefabricated hollow concrete steel pipe pile column is matched with the outer diameter of the pile body.

5. The connection node between the precast pile and the precast column according to claim 1, characterized in that: The connection unit includes the steel cage, the anchor and the filler; The steel cage is arranged along the axial direction of the pile body, with one end located inside the pile body and the other end located inside the column body; The anchor is arranged at the connection position between the pile body and the column body, and one end of the anchor is connected to the top end plate of the pile body, and the other end is anchored in the filler inside the column body.

6. The connection node between the precast pile and the precast column according to claim 5, characterized in that: The anchor is arranged along the axial direction of the pile body.

7. The connection node between the precast pile and the precast column according to claim 5, characterized in that: The column body comprises a steel pipe, the steel pipe is coaxially arranged with the pile body, and the outer diameter of the steel pipe is matched with the outer diameter of the pile body.

8. A construction method for a connection node between a precast pile and a precast column, for realizing a connection node between a precast pile and a precast column as claimed in any one of claims 1 to 4, characterized in that: include: Sinking the pile body to a preset elevation; The steel cage is installed inside the pile body, and the steel cage is connected and fixed to the top end plate of the pile body; Welding the bottom of the column body to the top end plate of the pile body; After the column body and the pile body are connected, they are sunk together to the preset elevation, and a temporary sealing plate is arranged on the top of the column body, and then they are sunk together to the designed elevation; After the earthwork is excavated to expose the top of the column body, the temporary sealing plate provided on the top of the column body is removed, and the filler is poured into the interior of the column body and the interior of the pile body.

9. A construction method for a connection node between a precast pile and a precast column, for realizing a connection node between a precast pile and a precast column as claimed in any one of claims 5 to 7, characterized in that: include: Sinking the pile body to a preset elevation; The steel cage is installed inside the pile body, the steel cage is connected and fixed to the top end plate of the pile body; and the anchor is arranged on the top end plate of the pile body; Welding the bottom of the column body to the top end plate of the pile body; After the column body and the pile body are connected, they are sunk together to the preset elevation, and a temporary sealing plate is arranged on the top of the column body, and then they are sunk together to the designed elevation; After the earthwork is excavated to expose the top of the column body, the temporary sealing plate provided on the top of the column body is removed, and the filler is poured into the interior of the column body and the interior of the pile body.

10. A construction method for a connection node between a precast pile and a precast column, for realizing a connection node between a precast pile and a precast column as claimed in any one of claims 5 to 7, characterized in that: include: Installing an anchor on the top end plate of the pile body; The top end plate of the pile body described in the last section is welded to the bottom of the column body; Install the steel cage inside the pile body; Pouring filler into the interior of the column body and the interior of the last section of the pile body; Sinking the remaining pile bodies located at the bottom to a preset elevation; The assembly formed by the column body and the last section of the pile body is hoisted and connected with the remaining pile bodies located at the lower part that have sunk to the preset elevation to form a prefabricated column pile; The prefabricated column piles are sunk to the designed elevation.

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