Tower crane foundation prefabricated stand column pile and construction method thereof

Abstract

The invention provides a tower crane foundation prefabricated stand column pile and a construction method thereof. 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 invention relates to the field of building construction, in particular to a tower crane foundation prefabricated column pile and a construction method thereof. Background Art

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

[0003] Regarding the high pile cap foundation of the tower crane, there are usually two types of lower support structures in the prior art: 1) bored cast-in-place piles + steel lattice columns; 2) bored cast-in-place piles + steel pipe columns. The two support structures are similar in form, that is, bored cast-in-place piles are constructed first, and then steel lattice columns or steel pipe columns are inserted into the cast-in-place piles. The lower ends of the steel lattice columns or steel pipe columns are anchored in the concrete of the cast-in-place piles, and the upper ends are connected to the tower crane cap.

[0004] The above-mentioned support structures require a lot of on-site operations, have low construction efficiency, long maintenance time, and high project costs. In addition, the construction of cast-in-place piles will also produce a large amount of mud, which requires a lot of manpower and material resources to deal with.

[0005] Based on this, how to improve the construction efficiency of the tower crane foundation column piles and reduce the construction cost of the tower crane foundation column piles under the premise of ensuring the safety of the tower crane has become a technical problem that technical personnel in this field need to solve. Summary of the invention

[0006] The object of the present invention is to provide a tower crane foundation prefabricated column pile and a construction method thereof, so as to solve the problems of the high pile cap foundation of the tower crane in the prior art, such as much on-site operations, low construction efficiency and high engineering cost.

[0007] In order to achieve the above-mentioned object, the present invention provides a tower crane foundation prefabricated column pile, comprising: a steel tube concrete column and a prefabricated pipe pile;

[0008] The top of the steel tube concrete column is connected to the tower crane cap; the bottom of the steel tube concrete column is connected to the prefabricated pipe pile; the interiors of the steel tube concrete column and the prefabricated pipe pile are both poured with concrete;

[0009] The prefabricated pipe pile is formed by connecting multiple pipe pile sections in sequence; the connecting parts of two adjacent pipe pile sections and the connecting parts of the steel tube concrete column and the prefabricated pipe pile are both provided with connecting components;

[0010] The connection assembly includes a reinforcement member, both ends of which extend into the two connected pipe pile sections, or the interior of the steel tube concrete column and the prefabricated pipe pile; the reinforcement member is anchored in the concrete to enhance the bearing capacity of the connection part.

[0011] Optionally, the connection assembly further includes an end plate, and the middle portion of the reinforcement is connected to the end plate.

[0012] Optionally, the end plate is provided with a circular hole adapted to the cavity of the prefabricated pipe pile;

[0013] The reinforcement is inserted into the circular hole, and the shape of the circular hole matches the shape of the reinforcement; the circular hole is also used to pour concrete into the cavity of the prefabricated column pile.

[0014] Optionally, the connection between the reinforcement and the end plate includes: welding connection and snap-fit ​​connection.

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

[0016] Optionally, the connection assembly located at the connection portion between the steel tube concrete column and the precast pipe pile also includes an anchor bolt, one end of which is connected to the top end plate of the precast pipe pile and extends outward; the other end of the anchor bolt is anchored in the concrete.

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

[0018] Optionally, the steel tube concrete column includes a steel tube and the concrete filled in the steel tube.

[0019] In order to achieve the above object, the present invention also provides a construction method for prefabricated column piles of a tower crane foundation, which is applied to the prefabricated column piles of the tower crane foundation as described above, comprising:

[0020] Install the cover plate or pile tip at the bottom of the first pipe pile section and start sinking the piles;

[0021] Sequentially sinking the pipe pile sections, and before the two adjacent pipe pile sections are butted, installing and fixing reinforcement members in the cavities of the pipe pile sections, and then welding end plates to achieve connection between the adjacent pipe pile sections;

[0022] After the uppermost pipe pile section is sunk to the preset elevation, anchor bolts are installed on the top end plate of the uppermost pipe pile section, reinforcements are installed and fixed in the cavity of the pipe pile section, and then the steel pipe of the steel tube concrete column and the prefabricated pipe pile are welded and sunk as a whole to the designed elevation;

[0023] Concrete is poured into the cavities of the steel pipes and the prefabricated pipe piles, and the construction is completed after the concrete curing is completed.

[0024] In order to achieve the above object, the present invention also provides a construction method for prefabricated column piles of a tower crane foundation, which is applied to the prefabricated column piles of the tower crane foundation as described above, comprising:

[0025] Install the cover plate or pile tip at the bottom of the first pipe pile section and start sinking the piles;

[0026] Sequentially sinking the pipe pile sections, and welding end plates to achieve connection between adjacent pipe pile sections;

[0027] After the pipe pile section of the uppermost section is sunk to the preset elevation, anchor bolts are installed on the top end plate of the pipe pile section of the uppermost section, and then the steel pipe of the steel tube concrete column and the prefabricated pipe pile are welded and sunk as a whole to the designed elevation;

[0028] Connecting the reinforcing members arranged at the connection parts of two adjacent pipe pile sections and the connection parts of the steel tube concrete column and the prefabricated pipe pile together to form a reinforcing assembly; inserting the reinforcing assembly into the cavity of the steel tube and the prefabricated pipe pile from the top of the steel tube until the reinforcing member is located at the connection parts of the corresponding two pipe pile sections and the connection parts of the steel tube concrete column and the prefabricated pipe pile;

[0029] Concrete is poured into the cavities of the steel pipes and the prefabricated pipe piles, and the construction is completed after the concrete curing is completed.

[0030] Compared with the existing tower crane foundation column piles, the tower crane foundation prefabricated column piles and the construction method thereof provided in this application have the following advantages:

[0031] The prefabricated column piles, steel pipes and prefabricated pipe piles of the tower crane foundation provided in the present application are all prefabricated components. During on-site operations, the prefabricated pile sinking process can be directly used for construction, which is simple and requires fewer steps. The steel tube concrete columns and prefabricated pipe piles themselves have a certain bearing capacity, and the poured concrete is mainly used to strengthen the nodes, so the curing age of the concrete can be shortened and the construction efficiency can be improved. At the same time, connecting components are arranged between adjacent pipe pile sections and between the prefabricated pipe piles and the steel tube concrete columns, and the connection quality is more reliable. Prefabricated pipe piles are used instead of poured piles, which has higher bearing efficiency and lower cost. Steel tube concrete columns are used instead of steel lattice columns or steel pipe columns, which consumes less steel and further reduces costs. In addition, since the steel tubes and prefabricated pipe piles are both prefabricated components, the construction quality is good, and a sealing plate or pile tip is arranged at the bottom of the prefabricated pipe piles, and there is no mud or water in the cavity, which can effectively improve the pouring quality of concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1A schematic diagram of a use scenario of the prefabricated column piles for the tower crane foundation provided by an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of the structure of a prefabricated column pile for a tower crane foundation provided by an embodiment of the present invention;

[0034] Figure 3 A schematic diagram of a connection assembly between two adjacent pipe pile sections provided by an embodiment of the present invention;

[0035] Figure 4 A schematic diagram of a connection assembly between a steel tube concrete column and a prefabricated pipe pile provided in an embodiment of the present invention;

[0036] Figure 5 A flow chart of a construction method for prefabricated column piles of a tower crane foundation provided by an embodiment of the present invention;

[0037] Figure 6 A schematic diagram of step S1 in the tower crane foundation prefabricated column pile construction method provided by an embodiment of the present invention;

[0038] Figure 7 A schematic diagram of step S2 in the tower crane foundation prefabricated column pile construction method provided by an embodiment of the present invention;

[0039] Figure 8 A schematic diagram of step S3 in the tower crane foundation prefabricated column pile construction method provided by an embodiment of the present invention;

[0040] Fig. 9 A schematic diagram of step S4 in the tower crane foundation prefabricated column pile construction method provided by an embodiment of the present invention;

[0041] Fig.10 A flow chart of another method for constructing prefabricated column piles for a tower crane foundation provided by an embodiment of the present invention;

[0042] Fig.11 A schematic diagram of step S10 in another method for constructing prefabricated column piles for a tower crane foundation provided by an embodiment of the present invention;

[0043] Fig.12 A schematic diagram of step S20 in another method for constructing prefabricated column piles for a tower crane foundation provided by an embodiment of the present invention;

[0044] Fig.13 A schematic diagram of step S30 in another method for constructing prefabricated column piles for a tower crane foundation provided by an embodiment of the present invention;

[0045] Fig.14 A schematic diagram of step S40 in another method for constructing prefabricated column piles for a tower crane foundation provided by an embodiment of the present invention;

[0046] Fig.15 A schematic diagram of step S50 in another method for constructing prefabricated column piles for a tower crane foundation provided by an embodiment of the present invention.

[0047] The description of each reference numeral is as follows:

[0048] 1-Concrete-filled steel tube columns;

[0049] 2-prefabricated pipe pile; 20-pile section; 21-sealing plate; 22-top end plate;

[0050] 3-connection assembly; 30-reinforcement member; 31-end plate; 32-anchor bolt;

[0051] 4-tower crane base; 5-concrete; 6-reinforcement components. DETAILED DESCRIPTION

[0052] 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.

[0053] 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.

[0054] The object of the present invention is to provide a tower crane foundation prefabricated column pile and a construction method thereof, so as to solve the problems of the high pile cap foundation of the tower crane in the prior art, such as much on-site operations, low construction efficiency and high engineering cost.

[0055] Please refer to Figures 1 to 4The present invention provides a prefabricated column pile for a tower crane foundation, comprising: a steel tube concrete column 1 and a prefabricated pipe pile 2; the top of the steel tube concrete column 1 is connected to the tower crane cap 4; the bottom of the steel tube concrete column 1 is connected to the prefabricated pipe pile 2; the interior of the steel tube concrete column 1 and the prefabricated pipe pile 2 are both poured with concrete 5; the prefabricated pipe pile 2 is formed by connecting multiple sections of pipe pile segments 20 in sequence; the connection parts of two adjacent sections of pipe pile segments 20, and the connection parts of the steel tube concrete column 1 and the prefabricated pipe pile 2 are both provided with a connection assembly 3; the connection assembly 3 includes a reinforcement member 30, and the two ends of the reinforcement member 30 extend into the interior of the two connected sections of pipe pile segments 20, or the steel tube concrete column 1 and the prefabricated pipe pile 2 respectively; the reinforcement member 30 is anchored in the concrete 5 to enhance the bearing performance of the connection part. It should be noted that in this embodiment, the steel tube concrete column 1 and the prefabricated pipe pile 2 are welded; and the adjacent pipe pile segments 20 are welded. The steel tube concrete column 1 includes a steel pipe and concrete 5 filled in the steel pipe. The steel tube and precast pipe pile 2 of the steel tube concrete column 1 are both prefabricated components in the factory, and components of appropriate sizes can be prefabricated based on actual working conditions. At the same time, in order to meet the requirements of the complex stress conditions of the tower crane, reinforcement members 30 are provided at the connection positions, which extend into the two connected components respectively and are anchored in the concrete 5, forming a whole with the entire precast column pile, concrete 5 and the surrounding soil, and jointly bear the forces exerted on the tower crane during operation, so that the connection quality is more reliable.

[0056] In addition, since the steel pipe and prefabricated pipe pile 2 of the steel tube concrete column 1 provided in this embodiment are both prefabricated components, after being transported to the construction site, the 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; and the steel pipe and prefabricated pipe pile 2 of the steel tube concrete column 1 themselves have a certain bearing capacity, and pouring concrete 5 into them is mainly to enhance the bearing capacity. Therefore, it is not necessary to wait until the curing age of the concrete 5 expires before starting the next process, which further shortens the construction period; at the same time, compared with the combination of cast-in-place piles and steel lattice columns or steel pipe columns in the prior art, the present embodiment uses prefabricated pipe piles 2 instead of cast-in-place piles, which has higher bearing efficiency, lower cost, and simpler construction process; using the steel tube concrete column 1 instead of the steel lattice column or the steel pipe column reduces the consumption of steel, thereby reducing the production cost.

[0057] As an optional embodiment, the connection assembly 3 further includes an end plate 31, and the middle portion of the reinforcement member 30 is connected to the end plate 31. Figures 2 to 4In this embodiment, the reinforcement 30 can be one or more combinations of steel cages, angle steel lattice columns or steel pipes. For example, those skilled in the art can set a steel mesh on the outside of the angle steel or steel pipe according to actual working conditions and load requirements to improve the bearing capacity of the connection between the adjacent pipe pile sections 20 or the steel tube concrete column 1 and the prefabricated pipe pile 2. In the specific construction process, since the two ends of the reinforcement 30 extend into the two connected components respectively, the middle part of the reinforcement 30 needs to be connected to the end plate 31 so that the reinforcement 30 will not be displaced during the pouring of concrete 5, thereby effectively improving the connection performance of the connection part.

[0058] Optional, please refer to Figure 3 The end plate 31 is provided with a circular hole (not shown in the figure) adapted to the cavity of the prefabricated pipe pile 2; the reinforcing member 30 is inserted into the circular hole, and the shape of the circular hole is adapted to the shape of the reinforcing member 30; the circular hole is also used to pour concrete 5 into the cavity of the prefabricated column pile. In this embodiment, the reinforcing member 30 is inserted into the circular hole, and can be welded to the end plate 31, or can be hung on the end plate 31 by setting a hook on the outer wall of the reinforcing member 30, or can be engaged in the circular hole by setting a variable diameter section, and this embodiment does not limit this.

[0059] Please refer to Figure 4 In another optional embodiment, the connection assembly 3 at the connection part of the steel tube concrete column 1 and the prefabricated pipe pile 2 also includes an anchor bolt 32, one end of which is connected to the top end plate 22 of the prefabricated pipe pile 2 and extends outward; 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 reinforcement 30 can meet the corresponding requirements when connected; and at the connection part of the steel tube concrete column 1 and the prefabricated pipe pile 2, since the wall thickness of the steel tube concrete column 1 is thinner than that of the prefabricated pipe pile 2, in order to strengthen the connection, it is also necessary to add an anchor bolt 32 at the top end plate 22 of the prefabricated pipe pile 2, one end of which is installed on the top end plate 22, and the other end extends in the direction close to the steel tube concrete column 1 and is anchored in the concrete 5, so as to further improve the bearing capacity of the connection part facing complex working conditions.

[0060] 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. Figure 2 In the illustrated example, a steel sealing plate 21 is provided at the bottom of the prefabricated pipe pile 2. In other embodiments, a pile tip may also be provided at the bottom of the prefabricated pipe pile 2 to form a closed structure to ensure that the bottom of the prefabricated pipe pile 2 is closed, so that no mud or water enters the cavity of the prefabricated pipe pile 2 during the pile sinking process, thereby ensuring the pouring quality of the concrete 5.

[0061] exist Figure 1 In the illustrated example, at least part of the steel tube concrete column 1 is exposed above the ground, and the prefabricated pipe pile 2 is sunk into the ground or below the bottom of the foundation pit. It should be noted that due to the particularity of the tower crane working scene, the tower crane cap 4 needs to be exposed above the ground, so the steel tube concrete column 1 located on the upper part of the column pile needs to be partially exposed above the ground, and in order to have a better bearing capacity, the prefabricated pipe pile 2 usually needs to be completely sunk into the ground or below the bottom of the foundation pit to better cooperate with the surrounding soil to bear the force.

[0062] In another embodiment, please refer to Figures 5 to 9 The present invention also provides a construction method for prefabricated column piles of a tower crane foundation, which is applied to the prefabricated column piles of the tower crane foundation as described above, comprising:

[0063] Step S1: Install the cover plate 21 or the pile tip at the bottom of the first pipe pile section 20 and start sinking the pile (e.g. Figure 6 shown);

[0064] Step S2: sink each pipe pile section 20 in sequence, and before two adjacent pipe pile sections 20 are butted together, install and fix the reinforcement member 30 in the cavity of the pipe pile section 20, and then weld the end plate 31 to achieve the connection between the adjacent pipe pile sections 20 (such as Figure 7 shown);

[0065] Step S3: After the top section of the pile 20 is sunk to the preset elevation, the anchor bolts 32 are installed on the top end plate 22 of the top section of the pile 20, the reinforcement 30 is installed and fixed in the cavity of the pile 20, and then the steel pipe of the steel tube concrete column 1 and the prefabricated pile 2 are welded and sunk as a whole to the designed elevation (such as Figure 8 shown);

[0066] Step S4: pour concrete 5 into the cavities of the steel pipe and the prefabricated pipe pile 2, and finish the construction after the concrete 5 is cured (e.g. Fig. 9 shown).

[0067] In an optional embodiment, in step S1, a static pile driver may be used to sink piles; in step S2, the reinforcement member 30 may be arranged on the end plate 31 of the lower pipe pile segment 20, or may be arranged on the end plate 31 of the upper pipe pile segment 20. Before adjacent pipe pile segments 20 are butted, the reinforcement member 30 is first connected to the end plate 31, and then two adjacent pipe pile segments 20 are welded, and the piles are sunk downward in sequence; in step S3, after all the pipe pile segments 20 are installed and formed, the reinforcement member 30 is installed on the uppermost section. Anchor bolts 32 are installed on the top end plate 22 of the pipe pile section 20, and the reinforcement 30 is welded to the top end plate 22, and then the steel pipe of the steel tube concrete column 1 and the prefabricated pipe pile 2 are welded together to form a whole and sink to the designed elevation; in step S4, concrete 5 is poured into the cavity of the steel pipe and the prefabricated pipe pile 2, and the construction is completed after the concrete 5 is cured for a period of time. Since in this embodiment, the main function of pouring concrete 5 is to strengthen, the curing age of concrete 5 can be appropriately shortened to improve construction efficiency.

[0068] With such configuration, the steel tube concrete column 1 and the precast pipe pile 2 are all precast components, and the precast pile sinking process can be directly used for construction during on-site operations, which is simple and requires fewer steps; and the steel tube concrete column 1 and the precast pipe pile 2 themselves have a certain bearing capacity, and the poured concrete 5 is mainly used to strengthen the node, so the curing age of the concrete 5 can be shortened and the construction efficiency can be improved; at the same time, connecting components 3 are arranged between adjacent pipe pile sections 20 and between the precast pipe pile 2 and the steel tube concrete column 1, and the connection quality is more reliable; the combination of the steel tube concrete column 1 and the precast pipe pile 2 is used instead of the combination of the steel tube column and the poured pile in the prior art, which can reduce the amount of steel used and reduce the construction cost; in addition, since the steel tube concrete column 1 and the precast pipe pile 2 are both precast components, the construction quality is good, and the bottom of the precast pipe pile 2 is provided with a sealing plate 21 or a pile tip, and there is no mud or water in the cavity, which can effectively improve the pouring quality of the concrete 5.

[0069] In another embodiment, please refer to Figures 10 to 15 The present invention also provides a construction method for prefabricated column piles of a tower crane foundation, which is applied to the prefabricated column piles of the tower crane foundation as described above, comprising:

[0070] Step S10: Install the cover plate 21 or the pile tip at the bottom of the first pipe pile section 20 and start sinking the pile (see Fig.11 );

[0071] Step S20: sequentially sink each pipe pile segment 20, and weld the end plate 31 to achieve the connection between adjacent pipe pile segments 20 (please refer to Fig.12 );

[0072] Step S30: After the top pipe pile section 20 is sunk to the preset elevation, the anchor bolts 32 are installed on the top end plate 22 of the top pipe pile section 20, and then the steel pipe of the steel tube concrete column 1 and the prefabricated pipe pile 2 are welded and sunk as a whole to the designed elevation (please refer to Fig.13 );

[0073] Step S40: Connect the reinforcement members 30 provided at the connection positions of two adjacent pipe pile sections 20 and the connection positions of the steel tube concrete column 1 and the prefabricated pipe pile 2 to form a reinforcement assembly 6; insert the reinforcement assembly 6 from the top of the steel tube into the cavity of the steel tube and the prefabricated pipe pile 2 until the reinforcement member 30 is located at the connection positions of the corresponding two pipe pile sections 20 and the connection positions of the steel tube concrete column 1 and the prefabricated pipe pile 2 (please refer to Fig.14 );

[0074] Step S50: pour concrete 5 into the cavities of the steel pipe and the prefabricated pipe pile 2, and finish the construction after the concrete 5 is cured (please refer to Fig.15 ).

[0075] As an optional embodiment, with Figures 6 to 9 What is different from the construction method shown is that in step S20 of this embodiment, only the end plates 31 of adjacent pipe pile sections 20 are welded together without installing the reinforcement members 30; in step S30, after all the pipe pile sections 20 are installed to form the prefabricated pipe piles 2, the anchor bolts 32 are installed on the top end plate 22 of the uppermost pipe pile section 20, and then the steel pipe of the steel tube concrete column 1 and the prefabricated pipe pile 2 are directly welded together to form a whole and then sunk to the designed elevation; in step S40, the reinforcement members 30 originally provided at each connection position are connected together to form a reinforcement assembly 6, which can be, for example, a steel cage formed by binding, and the reinforcement assembly 6 is inserted from the top of the steel pipe into the cavity of the steel pipe and the prefabricated pipe pile 2 until the reinforcement member 30 is located at the connection position of the corresponding two pipe pile sections 20, and the connection position between the steel tube concrete column 1 and the prefabricated pipe pile 2. Fig.14 As shown, in this embodiment, for the convenience of construction, the length of the reinforcement component 6 is adapted to the axial length of the prefabricated column pile, and reinforcement measures are taken at the connection position, such as increasing the binding density of the steel bars, selecting stronger steel bars, etc., to further improve the strength of the connection node.

[0076] With such configuration, the reinforcement 30 is installed separately after the steel pipe and the prefabricated pipe pile 2 are connected and sunk to the designed elevation, so that the reinforcement 30 does not need to be sunk together with the prefabricated pipe pile 2 or the steel pipe, thereby reducing the probability of damage to the reinforcement 30 during the sinking process, ensuring that the reinforcement component 6 can form an effective whole after pouring concrete 5, thereby further improving the reliability of the connection node.

[0077] In summary, in the prefabricated column piles for tower crane foundation and the construction method thereof provided in the embodiments of the present invention, the prefabricated column piles for tower crane foundation include: a steel tube concrete column and a prefabricated pipe pile; the top of the steel tube concrete column is connected to the tower crane pedestal; the bottom of the steel tube concrete column is connected to the prefabricated pipe pile; the steel tube of the steel tube concrete column and the interior of the prefabricated pipe pile are both poured with concrete; the prefabricated pipe pile is formed by connecting a plurality of pipe pile sections in sequence; the connecting parts of two adjacent pipe pile sections and the connecting parts of the steel tube concrete column and the prefabricated pipe pile are both provided with connecting components; the connecting components include a reinforcement member, and the two ends of the reinforcement member respectively extend into the two connected pipe pile sections, or the interior of the steel tube concrete column and the prefabricated pipe pile; the reinforcement member is anchored in the concrete to enhance the bearing performance of the connecting parts.

[0078] With such configuration, the steel pipes and precast pipe piles of the steel tube concrete column are all precast components, and the precast pile sinking process can be directly used for construction during on-site operations, which is simple and requires fewer steps; and the steel pipes and precast pipe piles of the steel tube concrete column themselves have a certain bearing capacity, and the poured concrete is mainly used to strengthen the nodes, so the curing age of the concrete can be shortened and the construction efficiency can be improved; at the same time, connecting components are provided between adjacent pipe pile sections and between the precast pipe piles and the steel tube concrete column, and the connection quality is more reliable; using precast pipe piles instead of poured piles has higher bearing efficiency and lower cost; using steel tube concrete columns instead of steel lattice columns or steel tube columns consumes less steel and further reduces costs; in addition, since the steel tube concrete columns and precast pipe piles are both precast components, the construction quality is good, and the bottom of the precast pipe piles is provided with a sealing plate or a pile tip, and there is no mud and sewage in the cavity, which can effectively improve the pouring quality of concrete.

[0079] 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 prefabricated column pile for a tower crane foundation, characterized in that: include: Concrete-filled steel tube columns and precast pipe piles; The top of the steel tube concrete column is connected to the tower crane cap; the bottom of the steel tube concrete column is connected to the prefabricated pipe pile; the interiors of the steel tube concrete column and the prefabricated pipe pile are both poured with concrete; The prefabricated pipe pile is formed by connecting multiple pipe pile sections in sequence; the connecting parts of two adjacent pipe pile sections and the connecting parts of the steel tube concrete column and the prefabricated pipe pile are both provided with connecting components; The connection assembly includes a reinforcement member, both ends of which extend into the two connected pipe pile sections, or the interior of the steel tube concrete column and the prefabricated pipe pile; the reinforcement member is anchored in the concrete to enhance the bearing capacity of the connection part.

2. The prefabricated column pile for tower crane foundation according to claim 1, characterized in that: The connection assembly further includes an end plate, and the middle portion of the reinforcement member is connected to the end plate.

3. The prefabricated column pile for tower crane foundation according to claim 2, characterized in that: The end plate is provided with a circular hole adapted to the cavity of the prefabricated pipe pile; The reinforcement is inserted into the circular hole, and the shape of the circular hole matches the shape of the reinforcement; the circular hole is also used to pour the concrete into the cavity of the prefabricated column pile.

4. The prefabricated column pile for tower crane foundation according to claim 2, characterized in that: The connection forms between the reinforcement member and the end plate include: welding connection and snap-fit ​​connection.

5. The prefabricated column pile for tower crane foundation according to claim 2, characterized in that: The reinforcement member includes: one or more of a steel cage, an angle steel lattice column, and a steel pipe.

6. The prefabricated column pile for tower crane foundation according to claim 1, characterized in that: The connection assembly located at the connection portion between the steel tube concrete column and the prefabricated pipe pile also includes an anchor bolt, one end of which is connected to the top end plate of the prefabricated pipe pile and extends outward; the other end of the anchor bolt is anchored in the concrete.

7. The prefabricated column pile for tower crane foundation according to claim 1, characterized in that: The bottom of the prefabricated pipe pile is provided with a sealing plate or a pile tip to form a closed structure.

8. The prefabricated column pile for tower crane foundation according to claim 1, characterized in that: The steel tube concrete column includes a steel tube and the concrete filled in the steel tube.

9. A construction method for prefabricated column piles of a tower crane foundation, characterized in that: The prefabricated column pile for a tower crane foundation according to any one of claims 1 to 8 comprises: Install the cover plate or pile tip at the bottom of the first pipe pile section and start sinking the piles; Sequentially sinking the pipe pile sections, and before the two adjacent pipe pile sections are butted, installing and fixing reinforcement members in the cavities of the pipe pile sections, and then welding end plates to achieve connection between the adjacent pipe pile sections; After the uppermost pipe pile section is sunk to the preset elevation, anchor bolts are installed on the top end plate of the uppermost pipe pile section, reinforcements are installed and fixed in the cavity of the pipe pile section, and then the steel pipe of the steel tube concrete column and the prefabricated pipe pile are welded and sunk as a whole to the designed elevation; Concrete is poured into the cavities of the steel pipes and the prefabricated pipe piles, and the construction is completed after the concrete curing is completed.

10. A construction method for prefabricated column piles of a tower crane foundation, characterized in that: The prefabricated column pile for a tower crane foundation according to any one of claims 1 to 8 comprises: Install the cover plate or pile tip at the bottom of the first pipe pile section and start sinking the piles; Sequentially sinking the pipe pile sections, and welding end plates to achieve connection between adjacent pipe pile sections; After the pipe pile section of the uppermost section is sunk to the preset elevation, anchor bolts are installed on the top end plate of the pipe pile section of the uppermost section, and then the steel pipe of the steel tube concrete column and the prefabricated pipe pile are welded and sunk as a whole to the designed elevation; Connecting the reinforcing members arranged at the connection parts of two adjacent pipe pile sections and the connection parts of the steel tube concrete column and the prefabricated pipe pile together to form a reinforcing assembly; inserting the reinforcing assembly into the cavity of the steel tube and the prefabricated pipe pile from the top of the steel tube until the reinforcing member is located at the connection parts of the corresponding two pipe pile sections and the connection parts of the steel tube concrete column and the prefabricated pipe pile; Concrete is poured into the cavities of the steel pipes and the prefabricated pipe piles, and the construction is completed after the concrete curing is completed.

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