Prefabricated stand column pile for tower crane foundation

Abstract

The utility model provides a tower crane foundation prefabricated stand column pile. The tower crane foundation prefabricated stand column pile comprises a steel pipe concrete column and a prefabricated pipe pile. The bottom of the concrete-filled steel tubular column is connected with the prefabricated tubular pile; concrete is poured into the concrete-filled steel tubular column and the prefabricated tubular pile; the prefabricated pipe pile is formed by sequentially connecting a plurality of pipe pile sections; connecting assemblies are arranged at the connecting position of every two adjacent pipe pile sections and the connecting position of the concrete-filled steel tubular column and the prefabricated pipe pile. The connecting assembly comprises a reinforcing piece, and the two ends of the reinforcing piece extend into the connected components correspondingly. The reinforcer is anchored in the concrete. The steel pipe and the prefabricated pipe pile are prefabricated parts, so that the processing quality is better, and the process is simple and few in procedures during field operation; connecting assemblies are arranged between the adjacent pipe pile sections and between the prefabricated pipe pile and the steel pipe concrete column, and the connecting quality is more reliable. The concrete filled steel tubular column and the prefabricated tubular pile can effectively save materials and reduce cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of building construction, especially a tower crane foundation prefabricated stand column pile. BACKGROUND

[0002] In a deep foundation pit project, many tower cranes are arranged in the foundation pit range, so these tower cranes need to be installed in advance. Because the working conditions are complex during the operation of the tower crane, the bearing capacity of the high-pile pile cap foundation of the tower crane is required to be high, and the high-pile pile cap foundation needs to be able to provide sufficient bearing capacity for complex working conditions such as compression resistance, tension resistance, bending resistance, and torsion resistance to ensure the safety of the foundation of the tower crane.

[0003] Regarding the high-pile pile cap foundation of the tower crane, the prior art usually has two kinds of lower support structures, 1) bored pile + steel lattice column; 2) bored pile + steel pipe column. These two support structures are similar in form, both of which first construct a bored pile, and then insert a steel lattice column or a steel pipe column into the bored pile, with the lower end of the steel lattice column or the steel pipe column anchored into the concrete of the bored pile and the upper end connected to the pile cap of the tower crane.

[0004] The above-mentioned support structure has many on-site operations, low construction efficiency, long maintenance time, high engineering cost, and a large amount of mud produced during the construction of the bored pile, which requires a lot of manpower and resources to handle.

[0005] Therefore, how to improve the construction efficiency and reduce the construction cost of the tower crane foundation stand column pile while ensuring the safety of the tower crane has become a technical problem that needs to be solved by those skilled in the art. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a tower crane foundation prefabricated stand column pile to solve the problems of many on-site operations, low construction efficiency, and high engineering cost of the high-pile pile cap foundation of the tower crane in the prior art.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a tower crane foundation prefabricated stand column pile, which comprises a steel pipe concrete column and a prefabricated pipe pile.

[0008] The top of the steel pipe concrete column is connected to the pile cap of the tower crane, the bottom of the steel pipe concrete column is connected to the prefabricated pipe pile, and the interiors of the steel pipe concrete column and the prefabricated pipe pile are filled with concrete.

[0009] The prefabricated pipe pile is formed by connecting multiple pipe pile segments in sequence, and the connecting parts of adjacent two pipe pile segments and the connecting parts of the steel pipe concrete column and the prefabricated pipe pile are all provided with connecting assemblies.

[0010] The connecting assembly comprises a reinforcing member, two ends of the reinforcing member extend into the interiors of two connected pipe pile sections or the interior of the concrete-filled steel tube column and the prefabricated pipe pile, and the reinforcing member is anchored in the concrete to enhance the load bearing capacity of the connecting part.

[0011] Optionally, the connecting assembly further comprises an end plate, and the middle part of the reinforcing member is connected with the end plate.

[0012] Optionally, the end plate is provided with a round hole matched with the cavity of the prefabricated pipe pile.

[0013] The reinforcing member is arranged in the round hole, and the shape of the round hole is matched with the shape of the reinforcing member; and the round hole is also used for pouring concrete into the cavity of the prefabricated column pile.

[0014] Optionally, the connecting form of the reinforcing member and the end plate comprises welding connection and clamping connection.

[0015] Optionally, the reinforcing member comprises one or more of a steel reinforcement cage, an angle steel lattice column and a steel pipe.

[0016] Optionally, the connecting assembly at the connecting part of the concrete-filled steel tube column and the prefabricated pipe pile further comprises an anchor bolt, one end of the anchor bolt is connected with the top end plate of the prefabricated pipe pile and extends outward, and the other end of the anchor bolt is anchored in the concrete.

[0017] Optionally, the bottom of the prefabricated pipe pile is provided with a sealing plate or a pile tip to form a closed structure.

[0018] Optionally, at least part of the concrete-filled steel tube column is arranged to be exposed to the ground, and the prefabricated pipe pile is sunk into the ground or below the bottom of a foundation pit.

[0019] Optionally, the concrete-filled steel tube column comprises a steel pipe and the concrete filled in the interior of the steel pipe.

[0020] Optionally, the adjacent pipe pile sections are connected by welding, and the concrete-filled steel tube column and the prefabricated pipe pile are connected by welding.

[0021] Compared with the existing tower crane foundation column pile, the tower crane foundation prefabricated column pile and the construction method thereof have the following advantages:

[0022] The precast column piles for tower crane foundations provided in this application are all precast components, including steel pipes and precast pipe piles. During on-site operations, precast pile driving technology can be directly used, simplifying the process and reducing the number of steps. Furthermore, the steel pipe concrete columns and precast pipe piles themselves possess a certain load-bearing capacity, with concrete pouring primarily serving to reinforce joints. This shortens the concrete curing period and improves construction efficiency. Simultaneously, connecting components are installed between adjacent pipe pile sections and between precast pipe piles and steel pipe concrete columns, ensuring more reliable connection quality. Using precast pipe piles instead of cast-in-place piles results in higher load-bearing efficiency and lower costs. Using steel pipe concrete columns instead of steel lattice columns or steel pipe columns reduces steel consumption, further lowering costs. In addition, since both steel pipes and precast pipe piles are precast components, the construction quality is high, and the precast pipe piles have a sealing plate or pile tip at the bottom, eliminating mud and water in the cavity and effectively improving the quality of concrete pouring. Attached Figure Description

[0023] Figure 1 A schematic diagram illustrating the application scenario of precast column piles for tower crane foundations provided in this embodiment of the utility model;

[0024] Figure 2 This is a structural schematic diagram of the precast column pile for tower crane foundation provided in an embodiment of the present utility model;

[0025] Figure 3 A schematic diagram of the connection assembly between two adjacent pipe pile sections provided in an embodiment of this utility model;

[0026] Figure 4 A schematic diagram of the connection assembly between the steel-concrete composite column and the precast pipe pile provided in an embodiment of this utility model;

[0027] Figure 5 A flowchart illustrating the construction method of precast column piles for tower crane foundations provided in this embodiment of the utility model;

[0028] Figure 6 A schematic diagram of step S1 in the construction method of precast column piles for tower crane foundation provided in this embodiment of the utility model;

[0029] Figure 7 A schematic diagram of step S2 in the construction method of precast column piles for tower crane foundation provided in this embodiment of the utility model;

[0030] Figure 8 A schematic diagram of step S3 in the construction method of precast column piles for tower crane foundation provided in this embodiment of the utility model;

[0031] Figure 9 This is a schematic diagram of step S4 in the construction method of precast column piles for tower crane foundation provided in this embodiment of the utility model.

[0032] The explanations of the reference numerals in the accompanying drawings are as follows:

[0033] 1-steel tube concrete column;

[0034] 2-prefabricated pipe pile; 20-pipe pile segment; 21-sealing plate; 22-top end plate;

[0035] 3-connecting assembly; 30-stiffener; 31-end plate; 32-anchoring bolt;

[0036] 4-tower bearing platform; 5-concrete. DETAILED DESCRIPTION

[0037] In order to make the purpose, advantages and characteristics of the utility model more clear, the following will make further detailed description to the utility model combining with the drawings and specific embodiments. It should be noted that the drawings are all very simplified form and are not drawn according to proportion, only to facilitate, clearly assist the purpose of explaining the embodiment of the utility model. In addition, the structure shown in the drawings is often a part of the actual structure. In particular, the emphasis of each drawing needs to be different, sometimes different proportions are used.

[0038] As used in this specification, the singular forms "a," "an" and "the" include plural referents unless the context clearly dictates otherwise. The term "or" is generally employed in its sense including "and / or" unless the context clearly dictates otherwise. The term "and / or" means "and", "or" or both. The term "at least two" generally means "two or more" unless the context clearly dictates otherwise. The terms "first," "second," "third," etc. are used only to describe one member of a group and do not, unless the context clearly dictates otherwise, indicate or imply relative importance or a number of such members. Thus, features with "first," "second" or "third" limitations can include one or at least two such features, either expressly or implicitly. The terms "one end" and "the other end," as well as "proximal" and "distal," generally refer to two parts that are opposite to each other, and they include not only the end points, but also the relative positional relationship between the two parts. The terms "mounting," "connecting," and "connecting" should be understood broadly, for example, they can be fixed connection, detachable connection, or integral; they can be directly connected, or indirectly connected through an intermediate medium; they can be the internal connection of two elements or the interaction relationship between two elements. In addition, as used in this specification, a component disposed on another component generally only indicates that there is a connection, coupling, cooperation or transmission relationship between the two components, and the connection, coupling, cooperation or transmission between the two components can be direct or indirect through an intermediate component, and cannot be understood as indicating or implying the spatial positional relationship between the two components, i.e. one component can be in any position inside, outside, above, below or one side of another component, unless the context clearly indicates otherwise. The terms "up", "down", "top", "bottom" are generally relative positional relationships arranged according to the direction of gravity; the terms "vertical direction" and "vertical direction" generally refer to the direction along the gravity, which is generally perpendicular to the ground, and the terms "horizontal direction" and "horizontal plane direction" generally refer to the direction parallel to the ground; the specific meaning of the above terms in this specification can be understood according to the specific circumstances by those skilled in the art.

[0039] The utility model discloses a tower crane foundation prefabricated stand column pile to solve the problem of the high pile cap foundation of tower crane of prior art, which has the advantages of high efficiency, low cost and high construction efficiency.

[0040] Please refer to Figures 1 to 4The utility model provides a kind of tower crane foundation prefabricated column pile, comprising: steel pipe concrete column 1 and prefabricated pipe pile 2;The top of steel pipe concrete column 1 is connected with tower crane platform 4;The bottom of steel pipe concrete column 1 is connected with prefabricated pipe pile 2;The inside of steel pipe concrete column 1 and prefabricated pipe pile 2 is all injected with concrete 5;Prefabricated pipe pile 2 is formed by multiple pipe pile sections 20 in turn connection;The connecting portion of adjacent two pipe pile sections 20, and the connecting portion of steel pipe concrete column 1 and prefabricated pipe pile 2 are all provided with connecting assembly 3;Connecting assembly 3 includes reinforcing member 30, and the both ends of reinforcing member 30 respectively extend into the inside of two pipe pile sections 20 connected or steel pipe concrete column 1 and prefabricated pipe pile 2;Reinforcing member 30 is anchored in concrete 5, to strengthen the load bearing performance of connecting portion.It needs to be explained, in the embodiment, steel pipe concrete column 1 is welded with prefabricated pipe pile 2;Adjacent pipe pile section 20 is welded connection.Steel pipe concrete column 1 includes steel pipe and concrete 5 filled in the inside of steel pipe.Steel pipe of steel pipe concrete column 1 and prefabricated pipe pile 2 are all factory prefabricated component, and suitable size component can be prefabricated based on actual working condition;Meanwhile, to meet the requirement of the complex stress working condition of tower crane, reinforcing member 30 is provided at connecting portion, respectively extends into two components connected, and is anchored in concrete 5, forms whole with entire prefabricated column pile, concrete 5 and surrounding soil body, and the acting force received in working process of tower crane is borne together, and connection quality is more reliable.

[0041] In addition, since the steel pipe of steel pipe concrete column 1 and prefabricated pipe pile 2 provided in the embodiment are all prefabricated components, after being transported to construction site, prefabricated pile sinking process can be directly used for construction, compared with the cast-in-place pile process in the prior art, the process is simple, the process is less, and the construction efficiency can be effectively improved;The steel pipe of steel pipe concrete column 1 and prefabricated pipe pile 2 itself has certain bearing capacity, and the concrete 5 in its inside is mainly used to strengthen the bearing capacity, so the next process can be started without waiting for the curing period of concrete 5 to expire, further shorten the construction period;Meanwhile, compared with the combination of cast-in-place pile and steel lattice column or steel pipe column in the prior art, prefabricated pipe pile 2 is used instead of cast-in-place pile in the embodiment, which has higher bearing efficiency and lower cost, and the construction process is also simpler;Steel pipe concrete column 1 is used instead of steel lattice column or steel pipe column, which reduces the consumption of steel, thereby reducing production cost.

[0042] As an optional embodiment, connecting assembly 3 further includes end plate 31, and the middle part of reinforcing member 30 is connected with end plate 31. Figures 2 to 4In the embodiment, the reinforcing member 30 can be one or a combination of a steel cage, an angle steel lattice column, or a steel pipe. For example, a steel mesh can be sleeved on the outside of the angle steel or the steel pipe according to the actual working condition and the bearing requirement, so as to improve the bearing capacity of the connection part between the adjacent pipe pile section 20 or the concrete-filled steel tube column 1 and the prefabricated pipe pile 2. In the actual construction process, since the two ends of the reinforcing member 30 extend into the two connected members respectively, the middle part of the reinforcing member 30 needs to be connected with the end plate 31, so that the reinforcing member 30 will not be displaced during the pouring of the concrete 5, thereby effectively improving the connection performance of the connection part.

[0043] Optionally, please refer to Figure 3 The end plate 31 is provided with a round hole (not shown in the figure) matched with the cavity of the prefabricated pipe pile 2; the reinforcing member 30 is sleeved in the round hole, the shape of the round hole is matched with the shape of the reinforcing member 30; and the round hole is also used for pouring the concrete 5 into the cavity of the prefabricated column pile. In the embodiment, the reinforcing member 30 is sleeved in the round hole, which can be welded with the end plate 31, or can be hung on the end plate 31 by providing a hook on the outer wall of the reinforcing member 30, or can be clamped in the round hole by providing a variable-diameter section, which is not limited in the embodiment.

[0044] Please refer to Figure 4 In another optional embodiment, the connection assembly 3 at the connection part between the concrete-filled steel tube column 1 and the prefabricated pipe pile 2 further comprises an anchor bolt 32, one end of the anchor bolt 32 is connected with the top end plate 22 of the prefabricated pipe pile 2 and extends outward, and the other end of the anchor bolt 32 is anchored in the concrete 5. It should be noted that since the adjacent pipe pile sections 20 are made of the same material and have the same size, the combination of the end plate 31 and the reinforcing member 30 can meet the corresponding requirements during the connection. However, at the connection part between the concrete-filled steel tube column 1 and the prefabricated pipe pile 2, the wall thickness of the concrete-filled steel tube column 1 is thinner than that of the prefabricated pipe pile 2, so in order to strengthen the connection, the anchor bolt 32 needs to be additionally provided at the top end plate 22 of the prefabricated pipe pile 2, one end of the anchor bolt 32 is mounted on the top end plate 22, the other end extends towards the concrete-filled steel tube column 1 and is anchored in the concrete 5, so as to further improve the bearing capacity of the connection part under complex working conditions.

[0045] Please refer to Figure 2 The bottom of the prefabricated pipe pile 2 is provided with a sealing plate 21 or a pile tip to form a closed structure. It should be noted that Figure 2 In the exemplary embodiment shown in the figure, the bottom of the prefabricated pipe pile 2 is provided with a steel sealing plate 21. In other embodiments, the bottom of the prefabricated pipe pile 2 can also be provided with a pile tip to form a closed structure, so as to ensure that the bottom of the prefabricated pipe pile 2 is closed, so that no mud water enters the cavity of the prefabricated pipe pile 2 during the pile sinking process, and the pouring quality of the concrete 5 can be ensured.

[0046] In Figure 1 In the shown example, at least part of the steel tube concrete column 1 is arranged to be exposed to the ground, and the prefabricated pipe pile 2 is sunk below the ground or the bottom of the foundation pit. It should be noted that due to the particularity of the tower crane working scene, the tower crane support platform 4 needs to be exposed to the ground, so the steel tube concrete column 1 located at the upper part of the column pile needs to be partially exposed to the ground, and in order to have better bearing capacity, the prefabricated pipe pile 2 usually needs to be completely sunk below the ground or the bottom of the foundation pit to better cooperate with the surrounding soil in force.

[0047] In another embodiment, please refer to Figures 5 to 9 The utility model also provides a construction method of the tower crane foundation prefabricated column pile, which is applied to the tower crane foundation prefabricated column pile as described above, and comprises the following steps:

[0048] Step S1: install the end plate 21 or the pile tip at the bottom of the first pipe pile section 20, and start pile sinking (as shown in Figure 6 );

[0049] Step S2: sink each pipe pile section 20 in sequence, install the reinforcing member 30 in the cavity of the pipe pile section 20 and fix it before the butt joint of the adjacent two pipe pile sections 20, then weld the end plate 31 to realize the connection between the adjacent pipe pile sections 20 (as shown in Figure 7 );

[0050] Step S3: after the uppermost pipe pile section 20 is sunk to the preset elevation, install the anchor bolt 32 on the top end plate 22 of the uppermost pipe pile section 20, install the reinforcing member 30 in the cavity of the pipe pile section 20 and fix it, then weld the steel pipe of the steel tube concrete column 1 and the prefabricated pipe pile 2, and sink the whole to the design elevation (as shown in Figure 8 );

[0051] Step S4: pour the concrete 5 into the cavity of the steel pipe and the prefabricated pipe pile 2, and after the concrete 5 is cured, end the construction (as shown in Figure 9 ).

[0052] In an alternative embodiment, in step S1, the pile sinking can be performed by a static pile driver; in step S2, the reinforcing member 30 can be arranged on the end plate 31 of the lower pipe pile section 20, or on the end plate 31 of the upper pipe pile section 20, the reinforcing member 30 is connected to the end plate 31 before the adjacent pipe pile sections 20 are connected, then the two adjacent pipe pile sections 20 are welded, and the pile sinking is sequentially performed downwards; in step S3, after all the pipe pile sections 20 are installed to form the steel pipe concrete column 1, the anchor bolt 32 is arranged on the top end plate 22 of the last pipe pile section 20, the reinforcing member 30 is welded to the top end plate 22, then the steel pipe of the steel pipe concrete column 1 and the precast pipe pile 2 are welded together to form an integrated whole and are sunk to the design elevation; in step S4, the concrete 5 is poured into the cavity of the steel pipe and the precast pipe pile 2, and after the concrete 5 is cured for a period of time, the construction is completed. In this embodiment, the main function of the poured concrete 5 is reinforcement, and thus the curing period of the concrete 5 can be appropriately shortened to improve the construction efficiency.

[0053] In this configuration, the steel pipe of the steel pipe concrete column 1 and the precast pipe pile 2 are both prefabricated components, and thus the precast pile sinking process can be directly used in the field operation, the process is simple, and the procedure is less. The steel pipe of the steel pipe concrete column 1 and the precast pipe pile 2 have certain bearing capacity, the poured concrete 5 is mainly used for reinforcing the joint, and thus the curing period of the concrete 5 can be shortened to improve the construction efficiency. Meanwhile, the connecting components 3 are arranged between the adjacent pipe pile sections 20 and between the precast pipe pile 2 and the steel pipe concrete column 1, and thus the connection is more reliable. The combination of the steel pipe concrete column 1 and the precast pipe pile 2 can replace the combination of the steel pipe column and the cast-in-place pile in the prior art, which can reduce the amount of steel and the construction cost. In addition, the steel pipe concrete column 1 and the precast pipe pile 2 are both prefabricated components, and thus the construction quality is good, the bottom of the precast pipe pile 2 is provided with the sealing plate 21 or the pile tip, and there is no mud in the cavity, which can effectively improve the pouring quality of the concrete 5.

[0054] In summary, in the tower crane foundation precast column pile and the construction method thereof provided in the embodiments of the present application, the tower crane foundation precast column pile comprises a steel pipe concrete column and a precast pipe pile; the top of the steel pipe concrete column is connected with a tower crane pile cap; the bottom of the steel pipe concrete column is connected with the precast pipe pile; the steel pipe of the steel pipe concrete column and the precast pipe pile are both filled with concrete; the precast pipe pile is formed by sequentially connecting multiple pipe pile sections; the connecting positions of the adjacent two pipe pile sections and the connecting positions of the steel pipe concrete column and the precast pipe pile are both provided with connecting components; the connecting components comprise reinforcing members, the two ends of the reinforcing members respectively extend into the interiors of the two connected pipe pile sections or the steel pipe concrete column and the precast pipe pile; and the reinforcing members are anchored in the concrete to enhance the bearing capacity of the connecting positions.

[0055] Thus configured, the steel pipe of the steel pipe concrete column and the precast pipe pile are both prefabricated components, and the precast pile sinking process can be directly used in field operation, the process is simple, and the procedures are less; and the steel pipe of the steel pipe concrete column and the precast pipe pile have certain bearing capacity, and the concrete is mainly used for reinforcing the joint, so the curing period of the concrete can be shortened, and the construction efficiency is improved; meanwhile, the connecting components are arranged between the adjacent pipe pile sections and between the precast pipe pile and the steel pipe concrete column, so the connection quality is more reliable; the precast pipe pile is used to replace the cast-in-place pile, so the bearing efficiency is higher, and the cost is lower; the steel pipe concrete column is used to replace the steel lattice column or the steel pipe column, so the steel consumption is less, and the cost is further reduced; in addition, the steel pipe concrete column and the precast pipe pile are both prefabricated components, the construction quality is good, and the bottom of the precast pipe pile is provided with a sealing plate or a pile tip, and there is no slurry and sewage in the cavity, so the pouring quality of the concrete can be effectively improved.

[0056] The above description is only a description of the preferred embodiments of the utility model, and does not limit the scope of the utility model in any way, and any change or modification made by the ordinary skilled in the art according to the above disclosure is within the protection scope of the claims.

Claims

1. A tower foundation precast column pile, characterized in that, The utility model relates to a steel pipe concrete column and prefabricated pipe pile, and a connecting assembly for connecting the steel pipe concrete column and the prefabricated pipe pile. The top of the steel pipe concrete column is connected with a tower crane support platform, and the bottom of the steel pipe concrete column is connected with the prefabricated pipe pile. The interior of the steel pipe concrete column and the prefabricated pipe pile is filled with concrete. The prefabricated pipe pile is formed by connecting a plurality of pipe pile segments in sequence. The connecting assembly comprises a reinforcing member, the two ends of the reinforcing member extend into the interior of the two connected pipe pile segments or the steel pipe concrete column and the prefabricated pipe pile, and the reinforcing member is anchored in the concrete to enhance the load bearing capacity of the connecting part.

2. The precast column pile of the tower foundation according to claim 1, wherein, The connecting assembly further comprises an end plate, and the middle part of the reinforcing member is connected with the end plate.

3. The precast column pile of the tower foundation according to claim 2, wherein, The end plate is provided with a round hole matched with the cavity of the prefabricated pipe pile. The reinforcing member is arranged in the round hole, and the shape of the round hole is matched with the shape of the reinforcing member.

4. The precast column pile of the tower foundation according to claim 2, wherein, The connecting form of the reinforcing member and the end plate comprises welding connection and clamping connection.

5. The precast column pile of the tower foundation according to claim 2, wherein, The reinforcing member comprises one or more of a steel reinforcement cage, an angle steel lattice column and a steel pipe.

6. The precast column pile of the tower foundation according to claim 1, wherein, The connecting assembly at the connecting part of the steel pipe concrete column and the prefabricated pipe pile further comprises an anchor bolt, one end of the anchor bolt is connected with the top end plate of the prefabricated pipe pile and extends outward, and the other end of the anchor bolt is anchored in the concrete.

7. The precast column pile of the tower foundation according to claim 1, wherein, The bottom of the prefabricated pipe pile is provided with a sealing plate or a pile tip to form a closed structure.

8. The precast column pile of the tower foundation according to claim 1, wherein, At least part of the steel pipe concrete column is arranged to be exposed above the ground, and the prefabricated pipe pile is sunk below the ground or the bottom of a foundation pit.

9. The precast column pile of the tower foundation according to claim 1, wherein, The steel pipe concrete column comprises a steel pipe and the concrete filled in the interior of the steel pipe.

10. The precast column pile of the tower foundation according to claim 1, wherein, The adjacent pipe pile segments are connected by welding, and the steel pipe concrete column and the prefabricated pipe pile are connected by welding.

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