Pile-breaking-free mechanical connection method between reinforced concrete square pile and bearing platform

Abstract

The invention discloses a pile-breaking-free mechanical connection method between a reinforced concrete square pile and a bearing platform, and the connection method comprises the following steps: manufacturing a steel reinforcement framework, connecting the steel reinforcement framework with a pile top end plate through a steel sleeve, and then pouring a concrete pile body to form the reinforced concrete square pile; the reinforced concrete square pile is subjected to pile sinking construction; and the pile top end plate is dismantled, and the bearing platform anchoring rib and the reinforced concrete square pile are mechanically connected through the steel sleeve. According to the pile-breaking-free mechanical connection method between the reinforced concrete square pile and the bearing platform, mechanical connection between the reinforced concrete square pile and the bearing platform can be achieved without mechanical breaking of the pile head of the reinforced concrete square pile, field welding work is avoided, construction is convenient and fast, and the method is more economical and reasonable.

Description

Technical Field

[0001] This application relates to the field of engineering construction technology, and in particular to a method for non-destructive mechanical connection between reinforced concrete square piles and pile caps. Background Technology

[0002] Currently, the most commonly used method for connecting reinforced concrete square piles to pile caps is the pile head breaking method. This method requires chiseling away part of the pile head concrete to expose the connecting reinforcing bars, and then welding the reinforcing bars. For the pile head breaking method, when the number of square piles in the project is large, the workload of breaking pile heads and welding is heavy, the investment of manpower and materials is huge, and there is obvious material waste. On-site welding work is greatly affected by the weather, the overall construction cost is high, and there are certain safety risks. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a non-destructive mechanical connection method between a reinforced concrete square pile and a pile cap. This method achieves the mechanical connection between the reinforced concrete square pile and the pile cap without breaking the pile, eliminating on-site welding work, improving construction operability, and being more economical and reasonable. To implement this connection method, this application simultaneously proposes a connecting accessory, which is a square pile top plate with a special opening and matching fixing bolts, to ensure the smooth implementation of the aforementioned novel connection method.

[0004] According to the embodiment of this application, the method for non-destructive mechanical connection between a reinforced concrete square pile and a pile cap includes: controlling the connection between the reinforcing steel frame and the pile cap; forming an integral reinforced concrete square pile by pouring concrete pile body; driving the reinforced concrete square pile; and controlling the mechanical connection between the pile cap anchor bars and the reinforced concrete square pile.

[0005] According to some embodiments of this application, the method for non-destructive mechanical connection between a reinforced concrete square pile and a pile cap, wherein controlling the connection between the reinforcing steel cage and the pile top plate to form an integral reinforced concrete square pile by pouring concrete pile body includes: machining a certain length of thread at the top end of the longitudinal reinforcing steel in the reinforcing steel cage, the thread length being approximately half the length of the mechanical connection steel sleeve; installing the mechanical connection steel sleeve at the top end of the longitudinal reinforcing steel through the aforementioned thread; fabricating a pile top plate that meets the requirements, the pile top plate being a Q235 or Q335 square steel plate, its planar dimensions being the same as the square pile; the pile top plate having openings, the position and number of which correspond one-to-one with the longitudinal reinforcing steel and the steel sleeve. Correspondingly, the opening is a T-shaped circular hole with a larger upper section and a smaller lower section. The lower small circular hole is threaded, and its diameter matches that of the steel sleeve. Fixing bolts are made, which are standard countersunk bolts. Their arrangement and quantity correspond one-to-one with the openings on the pile top plate and the steel sleeve. The lower stud of the fixing bolt can extend to half the length of the steel sleeve. The fixing bolts are passed through the openings on the pile top plate and screwed into the steel sleeve, thus connecting the pile top plate and the steel sleeve. In this way, the reinforcing steel skeleton, the steel sleeve, and the pile top plate form a composite. A release agent is applied to the lower surface of the pile top plate, that is, the surface connected to the steel sleeve. The concrete pile body is poured to enclose the aforementioned composite, forming an integral reinforced concrete square pile.

[0006] According to some embodiments of this application, the non-destructive mechanical connection method between a reinforced concrete square pile and a pile cap includes the following steps for driving the reinforced concrete square pile: ensuring that the aforementioned fixing bolts are tightened so that the top bolt head is completely submerged in the large circular hole at the top of the pile top plate, and ensuring that the bolt head does not protrude from the top surface of the pile top plate; and applying a load to the pile top plate to drive the reinforced concrete square pile into the driving area.

[0007] According to some embodiments of this application, the non-destructive mechanical connection method between reinforced concrete square piles and pile caps uses a fixing bolt that is a head bolt with the same thread specification as the internal thread of the aforementioned steel sleeve. The thickness of the head bolt is less than the depth of the large circular hole at the top of the pile cap, and the diameter of the head bolt is less than the diameter of the large circular hole at the top of the pile cap.

[0008] According to some embodiments of this application, the method for non-destructive mechanical connection between reinforced concrete square piles and pile caps includes a pile cap body and pile cap anchor bars. The pile cap anchor bars are embedded in the pile cap body, and the lower end of the pile cap anchor bars is connected to the top of the square pile. The mechanical connection between the pile cap anchor bars and the reinforced concrete square pile includes: removing the fixing bolts; removing the pile top plate; and connecting the pile cap anchor bars to the reinforcing steel skeleton.

[0009] According to some embodiments of this application, the method for non-destructive mechanical connection between reinforced concrete square piles and pile caps involves a pile cap anchor bar corresponding to a steel sleeve. The lower end of the pile cap anchor bar is threaded and extends to half the length of the steel sleeve, where it is threadedly connected to the steel sleeve.

[0010] According to some embodiments of this application, the non-destructive mechanical connection method between reinforced concrete square piles and pile caps achieves the connection between the pile cap anchor bars and the reinforcing steel skeleton and the reinforced concrete square piles by connecting them with steel sleeves, thereby achieving a non-destructive mechanical connection between the reinforced concrete square piles and the pile caps.

[0011] According to some embodiments of this application, the relevant accessories for the non-destructive mechanical connection method between reinforced concrete square piles and pile caps include the aforementioned pile top plate and fixing bolts. The pile top plate has the following characteristics: it is made of Q235 or Q335 steel, its planar dimensions are the same as the cross-sectional dimensions of the reinforced concrete square pile, and its opening is a T-shaped circular hole with a larger upper section and a smaller lower section. The lower small circular hole is threaded, and its diameter matches that of the steel sleeve. The diameter and depth of the upper large circular hole are slightly larger than the diameter and thickness of the aforementioned fixing bolt head. The planar positions of all openings correspond one-to-one with the aforementioned steel sleeve and pile cap anchor bars. The fixing bolt has the following characteristics: it is a head bolt, the thread specification of its lower stud is consistent with the internal thread of the aforementioned steel sleeve, the lower stud extends to half the length of the steel sleeve, the thickness of the top head is less than the depth of the upper large circular hole of the pile top plate, and the diameter of the top head is less than the diameter of the upper large circular hole of the pile top plate.

[0012] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0013] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the non-destructive mechanical connection method between reinforced concrete square piles and pile caps according to an embodiment of this application. Figure 2 This is a schematic diagram of the non-destructive mechanical connection method between reinforced concrete square piles and pile caps according to an embodiment of this application. Figure 1 ; Figure 3 This is a schematic diagram of the non-destructive mechanical connection method between reinforced concrete square piles and pile caps according to an embodiment of this application. Figure 2 ; Figure 4 This is a schematic diagram of the non-destructive mechanical connection method between reinforced concrete square piles and pile caps according to an embodiment of this application. Figure 3 ; Figure 5 This is a schematic diagram of the non-destructive mechanical connection method between reinforced concrete square piles and pile caps according to an embodiment of this application. Figure 4 ; Figure 6This is a detailed schematic diagram of the connection structure of the top plate of the reinforced concrete square pile according to an embodiment of this application; Figure 7 This is a detailed schematic diagram of the pile top plate according to an embodiment of this application.

[0014] Figure label: 10. Reinforced concrete square pile, 11. Reinforcing steel cage, 12. Pile top plate, 13. Fixing bolt, 14. Concrete pile body, 15. Steel sleeve, 16. Opening. The pile cap is 30mm thick, and the anchoring reinforcement bars for the pile cap are 31mm thick. Detailed Implementation

[0015] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0016] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0017] Currently, the most commonly used method for connecting reinforced concrete square piles to pile caps is the pile head breaking method. This method requires chiseling away part of the pile head concrete to expose the connecting reinforcing bars, followed by welding. For the pile head breaking method, when the project has a large number of square piles, the workload of breaking pile heads and welding is heavy, requiring significant manpower and material resources and resulting in obvious material waste. On-site welding work is greatly affected by weather, leading to high overall construction costs and certain safety risks.

[0018] In response, this application proposes a novel mechanical connection method for connecting a reinforced concrete square pile 10 to a pile cap without breaking the pile.

[0019] like Figure 1As shown, the reinforced concrete square pile 10 includes a steel reinforcement cage 11, a pile top plate 12, fixing bolts 13, a concrete pile body 14, and a steel sleeve 15; the pile foundation cap includes a cap body and cap anchor bars 31.

[0020] like Figure 2 As shown, the non-destructive mechanical connection method between reinforced concrete square piles and pile caps includes: S10: The steel reinforcement cage 11 and the pile top plate 12 are connected, and the concrete pile body 14 is poured to form an integral reinforced concrete square pile 10.

[0021] Specifically, a steel reinforcement cage 11 is fabricated, a pile top plate 12 is fabricated, the steel reinforcement cage 11 is connected to the pile top plate 12, and a concrete pile body 14 is poured to form a reinforced concrete square pile 10.

[0022] S20: Construction of 10 reinforced concrete square piles.

[0023] S30: Control the mechanical connection between the anchor bar 31 of the foundation and the reinforced concrete square pile 10.

[0024] Specifically, the threaded anchor bar 31 is fabricated, the top plate 12 of the pile and the fixing bolts 13 are removed, and the anchor bar 31 is connected to the reinforced concrete square pile 10 through the steel sleeve 15.

[0025] like Figure 3 As shown, S10: The connection between the reinforcing steel cage 11 and the pile top plate 12, and the formation of an integral reinforced concrete square pile 10 by pouring concrete pile body 14, includes: S11: The longitudinal steel bars in the steel cage 11 are fixed to the steel sleeve 15 by thread.

[0026] Specifically, a certain length of thread is processed at the top end of the longitudinal steel bar in the steel reinforcement cage 11. The thread length is about half the length of the mechanical connection steel sleeve 15. The mechanical connection steel sleeve 15 is installed at the top end of the longitudinal steel bar through the aforementioned thread. S12: Connect and fix the pile top plate 12 to the steel sleeve 15 with fixing bolts 13.

[0027] Specifically, a pile top plate 12 that meets the requirements is made. The pile top plate is a square steel plate of Q235 or Q335, and its planar dimensions are the same as those of the square pile. The pile top plate 12 is provided with openings 16. The position and number of openings 16 correspond one-to-one with the longitudinal reinforcement and steel sleeve 15. The openings 16 are round holes with a T-shaped cross section that is larger at the top and smaller at the bottom. The small round hole at the bottom is threaded, and its diameter matches that of the steel sleeve 15. S13: Forming an assembly including a steel reinforcement cage 11, a steel sleeve 15, fixing bolts 13, and a pile top plate 12.

[0028] Specifically, fixing bolts 13 are manufactured. These are standard countersunk bolts, and their arrangement and quantity correspond one-to-one with the openings 16 of the pile top plate 12 and the steel sleeves 15. The lower studs of the fixing bolts 13 can extend to half the length of the steel sleeves 15. The fixing bolts 13 are passed through the openings 16 of the pile top plate 12 and screwed into the steel sleeves 15, thus connecting the pile top plate 12 and the steel sleeves 15. In this way, the reinforcing steel cage 11, the steel sleeves 15, and the pile top plate 12 form a composite. S14: Apply release agent to the lower surface of the pile top plate 12, pour concrete pile body 14 to wrap the assembly, forming an integral reinforced concrete square pile 10.

[0029] Specifically, the pile top plate 12 can serve as a side template for the end of the square pile. A release agent is applied to the lower surface of the pile top plate 12, i.e. the surface connected to the steel sleeve 15. The concrete pile body 14 is poured to enclose the aforementioned assembly, forming an integral reinforced concrete square pile 10.

[0030] It is understood that the novel reinforced concrete square pile 10 of this application, in addition to the reinforcing steel cage 11 and the concrete pile body 14, also includes a pile top plate 12, fixing bolts 13, and a steel sleeve 15. The pile top plate 12 and fixing bolts 13 are removable. Due to the application of a release agent, the pile top plate 12 can be removed along with the fixing bolts 13. During the pile fabrication process of the reinforced concrete square pile 10, the fixing bolts 13 and the pile top plate 12 protect the internal threads of the steel sleeve 15, preventing concrete slurry from flowing into the steel sleeve 15. Thus, after removing the fixing bolts 13 and the pile top plate 12 and exposing one end of the steel sleeve 15, the aforementioned foundation anchoring reinforcement 31 can be directly connected to the steel sleeve 15. Since the other end of the steel sleeve 15 is already directly connected to the reinforcing steel cage 11, the mechanical connection between the reinforced concrete square pile 10 and the foundation 30 can be achieved without breaking the pile. Furthermore, there is no on-site welding work, making construction highly operable and more economical and reasonable. In addition, the disassembled fixing bolts 13 and pile top plate 12 can be reused, which can greatly reduce the consumption of materials.

[0031] The specifications for the threaded top of the longitudinal reinforcing bars in the reinforcing cage 11 are not limited here.

[0032] The processing and forming process of the steel reinforcement cage 11, the pile top plate 12, and the fixing bolts 13 is not limited here.

[0033] like Figure 4 As shown, S20: The construction of 10 reinforced concrete square piles includes: S21: Control the top surface of the fixing bolt 13 to be lower than the top surface of the pile top plate 12.

[0034] Specifically, ensure that the aforementioned fixing bolt 13 is tightened so that its top screw head is completely submerged in the large circular hole at the top of the pile top plate 12, and ensure that the screw head does not protrude from the top surface of the pile top plate 12.

[0035] S22: Apply a load to the top plate 12 of the pile to drive the reinforced concrete square pile 10 into the pile driving area.

[0036] Specifically, a load is applied to the top plate 12 of the pile to drive the reinforced concrete square pile 10 into the pile driving area.

[0037] like Figure 5 As shown, the mechanical connection between the reinforced concrete square pile 10 and the pile cap 30 mainly includes: S31: Remove fixing bolt 13.

[0038] Specifically, the anchor bar 31 of the pile cap is made, and a certain length of thread is processed at its lower end to ensure that the anchor bar can be extended to the position of half the length of the steel sleeve 15. The fixing bolts 13 connecting the top plate 12 of the pile and the steel sleeve 15 are removed.

[0039] S32: Remove the top plate 12 of the pile.

[0040] S33: Controls the connection between the anchor bar 31 of the foundation and the steel reinforcement cage 11.

[0041] Specifically, the threaded end of the foundation anchor bar 31 is screwed into the steel sleeve 15 to complete the mechanical connection between the foundation anchor bar 31 and the reinforced concrete square pile 10.

[0042] In this way, when the reinforced concrete square pile 10 is connected to the pile cap 30, the mechanical connection between the reinforced concrete square pile 10 and the pile cap 30 can be achieved without breaking the pile. There is no on-site welding work, which makes the construction more feasible and more economical.

[0043] Figure 6 This is a detailed schematic diagram of the connection structure between the top plate and the top plate of a reinforced concrete square pile.

[0044] A specific embodiment of the mechanical connection method between reinforced concrete square piles and pile caps of this application is described below with reference to the accompanying drawings: (1) 10 reinforced concrete square piles A pile top plate 12 is installed on the top of the reinforced concrete square pile 10. The end plate is made of Q235B steel with a thickness of 20mm. The purpose of the steel end plate is to protect the pile head from damage during the pile driving construction stage, and it can also serve as the end side formwork when casting the square pile. The fixing bolts 13 can be M18~M24 head bolts depending on the diameter of the main reinforcement of the square pile.

[0045] Before pile fabrication, the steel sleeve 15 should be inspected and accepted at the pile prefabrication plant. The mechanical connection joint should be tested for mechanical properties. The joint quality grade should be Grade I. The sleeve and joint inspection should meet the relevant requirements of "Sleeves for Mechanical Connection of Reinforcing Bars" (JG / T 163) and "Technical Specification for Mechanical Connection of Reinforcing Bars" (JGJ 107).

[0046] (2) 10 reinforced concrete square piles were driven The pile can be driven by hammer penetration or static pressure method. For hammer penetration, a suitable pile hammer should be selected and the number of hammer blows should be controlled to avoid excessive impact that could damage the pile. The selection of pile driving equipment and tools, as well as construction requirements, should be handled in accordance with current specifications and regulations.

[0047] (3) Connection between reinforced concrete square pile 10 and pile cap 30 The foundation anchor bars 31 are mechanically connected to the longitudinal reinforcing bars in the reinforcing cage 11 via steel sleeves 15. The number of foundation anchor bars 31 and steel sleeves 15 is consistent with the number of longitudinal reinforcing bars in the reinforcing cage 11, and the quality grade of the steel sleeves 15 is Grade I. After the connection construction is completed, the joint should be inspected on-site. The uniaxial tensile load value used for the inspection should be calculated based on the design strength of the foundation anchor bars 31.

[0048] In practical implementation, for example, if the geological conditions of a certain project are suitable for the use of reinforced concrete square piles 10, and the number is huge, with a total of more than 30,000 piles, the above-mentioned non-destructive mechanical connection method between reinforced concrete square piles and pile caps can achieve non-destructive mechanical connection, resulting in high quality of pile fabrication, fast pile driving, intact pile head quality after pile driving, quick connection operation, and joint quality inspection that fully meets design requirements. At the same time, the construction saves at least 30,000 man-hours and the overall construction period is saved by at least 3 months.

[0049] Therefore, the mechanical connection method between the reinforced concrete square pile and the pile cap of this application has at least the following advantages: 1. The non-destructive pile mechanical connection requires minimal on-site construction work. Only the anchor bars of the pile cap need to be screwed into the connecting steel sleeve. There is no need to break the pile head or perform on-site welding. This can effectively ensure construction quality and significantly shorten the construction period, while also reducing project costs. It indirectly plays a certain role in promoting energy conservation, emission reduction and the achievement of dual carbon goals.

[0050] 2. The pile top plate and fixing bolts are all detachable and can be reused, effectively reducing material consumption during construction.

[0051] 3. Based on existing theories and practices of mechanical connection of reinforcing bars, this method provides a brand-new connection method. All fabrication and construction operations can be completed using existing equipment. It has the advantages of convenient operation, easy quantification of indicators, and controllable quality.

[0052] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0054] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0055] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0057] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for non-destructive mechanical connection between a reinforced concrete square pile and a pile cap, wherein the reinforced concrete square pile (10) mainly comprises a steel reinforcement cage (11), a pile top plate (12), and a concrete pile body (14), characterized in that, The method for non-destructive mechanical connection between reinforced concrete square piles and pile caps includes: The steel reinforcement cage (11) and the pile top plate (12) are connected, and the reinforced concrete square pile (10) is formed by pouring concrete pile body (14); The construction of the reinforced concrete square pile (10); The anchoring bars (31) of the control pile cap are mechanically connected to the reinforced concrete square pile (10).

2. The method for non-destructive mechanical connection between reinforced concrete square piles and pile caps according to claim 1, characterized in that, The connection between the steel reinforcement cage (11) and the pile top plate (12), and the integral reinforced concrete square pile (10) formed by pouring the concrete pile body (14) includes: The longitudinal steel bars in the steel reinforcement cage (11) are fixed to the steel sleeve (15) by thread; The pile top plate (12) is connected and fixed to the steel sleeve (15) by fixing bolts (13); Forming an assembly including the steel reinforcement cage (11), the steel sleeve (15), the fixing bolts (13), and the pile top plate (12); The lower surface of the top plate (12) of the pile is coated with a release agent, and the concrete pile body (14) is poured to wrap the assembly, forming the integral reinforced concrete square pile (10).

3. The method for non-destructive mechanical connection between reinforced concrete square piles and pile caps according to claim 2, characterized in that, The steel reinforcement cage (11) is a combination of the longitudinal steel bars and stirrups, and the position of the longitudinal steel bars corresponds one-to-one with the steel sleeve (15).

4. The method for non-destructive mechanical connection between reinforced concrete square piles and pile caps according to claim 3, characterized in that, The pile top plate (12) is a Q235 steel plate or a Q335 steel plate. The pile top plate (12) is provided with an opening (16). The position of the opening (16) corresponds one-to-one with the steel sleeve (15). The opening (16) is threaded, and its diameter is the same as that of the steel sleeve (15).

5. The method for non-destructive mechanical connection between reinforced concrete square piles and pile caps according to claim 4, characterized in that, The fixing bolts (13) are standard countersunk bolts. The number of fixing bolts (13) corresponds one-to-one with the openings (16) of the pile top plate (12). The pile top plate (12) and the steel sleeve (15) are connected by the fixing bolts (13).

6. The method for non-destructive mechanical connection between reinforced concrete square piles and pile caps according to claim 5, characterized in that, The construction of the reinforced concrete square pile (10) includes: Control the top surface of the fixing bolt (13) to be lower than the top surface of the pile top plate (12); A load is applied to the top plate (12) of the pile to drive the reinforced concrete square pile (10) into the pile driving area.

7. The method for non-destructive mechanical connection between reinforced concrete square piles and pile caps according to claim 6, characterized in that, The connection between the control pile cap anchor bar (31) and the reinforced concrete square pile (10) includes: Remove the fixing bolts (13); Remove the top plate (12) of the pile; The anchoring bars (31) of the control pile cap are connected to the steel reinforcement cage (11).

8. The method for non-destructive mechanical connection between reinforced concrete square piles and pile caps according to claim 7, characterized in that, The fixing bolt (13) and the pile top plate (12) are reusable.

9. The method for non-destructive mechanical connection between reinforced concrete square piles and pile caps according to claim 8, characterized in that, The anchor bar (31) of the bearing platform corresponds one-to-one with the steel sleeve (15). The lower end of the anchor bar (31) of the bearing platform is threaded and threaded to the steel sleeve (15).

10. The method for non-destructive mechanical connection between reinforced concrete square piles and pile caps according to claim 9, characterized in that, The anchor bar (31) of the foundation is connected to the steel sleeve (15) to achieve connection with the steel reinforcement skeleton (11) and the reinforced concrete square pile (10), and at the same time achieves a mechanical connection between the reinforced concrete square pile (10) and the pile foundation (30) without breaking the pile.

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