A precast pile with a pile cap and a construction method of the precast pile

Abstract

The application relates to a precast pile with a pile cap and a construction method of the precast pile. The precast pile with the pile cap comprises a pile body and a pile cap arranged at the top end of the pile body, prestressed reinforcement cages and anchoring reinforcement cages are pre-embedded in the pile body, one end of the prestressed reinforcement cage is flush with the top end of the pile body, the anchoring reinforcement cage is connected to the prestressed reinforcement cage, the anchoring reinforcement cage extends out of the central position of the top end of the pile body, a through hole is formed in the pile cap, and the pile cap is connected to the prestressed reinforcement cage through bolts. The construction method of the precast pile with the pile cap comprises the following steps: S1, manufacturing prestressed reinforcement cages and anchoring reinforcement cages; S2, tensioning the prestressed steel bars; S3, pouring the pile body and manufacturing the pile cap; S4, assembling the pile body and the pile cap into a product; S5, detecting and transporting the pile body; S6, pile sinking construction; S7, earth excavation; and S8, removing the pile cap. The application improves the construction efficiency and reduces the construction cost under the condition of guaranteeing the anchoring effect of the precast pile and the pile cap.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of precast piles, in particular to a precast pile with a pile cap and a construction method of the precast pile. BACKGROUND

[0002] The precast pile generally refers to a precast concrete pile. The precast concrete pile is short for a precast pile, which is suitable for foundation treatment of silt, silt soil, clay, silt, sandy soil and artificial fill, etc. During foundation construction, it is necessary to ensure that the precast pile and the pile cap have sufficient anchoring force.

[0003] In order to ensure the anchoring force of the precast pile and the pile cap, the first way is to reserve a length of anchoring steel bars at the top of the precast pile, break the concrete at the top of the pile when excavating to the bottom of the foundation, so that the exposed anchoring steel bars are connected and anchored with the steel cage of the pile cap, and then they are poured together. Another way is to reserve a joint with internal threads at the top of the precast pile, and then the anchoring steel bars for connecting the steel cage of the pile cap are screwed into the joint, and then they are poured together.

[0004] In the process of implementing the present application, the inventors found that there are at least the following problems in the technology: The pile breaking process in the first way needs to consume manpower and material resources, and increases the construction cost. The second way is easy to damage the pile body during excavator construction, thereby damaging the joint, and impurities are easy to remain in the joint, which finally leads to unreliable connection of the anchoring steel bars after being screwed into the joint, and safety hazards exist. SUMMARY

[0005] In order to ensure the anchoring effect of the precast pile and the pile cap, improve the construction efficiency, and reduce the construction cost, the present application provides a precast pile with a pile cap and a construction method of the precast pile.

[0006] In the first aspect, the present application provides a precast pile with a pile cap, which adopts the following technical scheme:

[0007] A precast pile with a pile cap, comprising a pile body and a pile cap arranged at the top end of the pile body, a prestressed steel cage and an anchoring steel cage are pre-buried in the pile body, one end of the prestressed steel cage is flush with the top end of the pile body, the anchoring steel cage is connected to the prestressed steel cage, the anchoring steel cage extends out of the center position of the top end of the pile body, a through hole is formed in the pile cap, the part of the anchoring steel cage extending out of the pile body is inserted and matched with the through hole, and the pile cap is connected with the prestressed steel cage through bolts.

[0008] By adopting the technical scheme, the pile cap with a through hole is detachably connected to the top end of the pile body, the anchoring steel reinforcement cage is arranged inside the pile body and extends out of the central position of the top end of the pile body, and the influence on tensioning of the prestressed steel reinforcement cage is reduced. The anchoring steel reinforcement cage is partially extended out of the pile body and is inserted and matched with the through hole, so that when the precast pile is constructed, the pile body with the pile cap is directly driven to the set elevation, and then the pile cap is removed, the anchoring steel reinforcement cage is directly anchored on the steel reinforcement cage of the pile cap, and then the exposed anchoring steel reinforcement cage is poured together with the pile cap.

[0009] Firstly, the anchoring steel reinforcement cage extended out of the pile body saves the process of pile breaking, reduces the engineering cost, and at the same time, the pile body remains intact and is not damaged. Secondly, the anchoring steel reinforcement cage is partially pre-buried in the pile body, so that the strength of the anchoring steel reinforcement cage is high, and the connection between the pile body and the pile cap is firm and reliable. In addition, in the process of pile transportation, hoisting, pile sinking and earth excavation construction, the anchoring steel reinforcement cage is protected by the pile cap and is not easily damaged, thereby reducing the loss of the pile body. Finally, when the pile cap is removed, if the standard of reusability is met, the pile cap can be reused, thereby further reducing resource waste and reducing the engineering cost.

[0010] Optionally, the prestressed steel reinforcement cage comprises a plurality of prestressed steel bars arranged around the pile body and a plurality of bundled steel bars arranged along the length direction of the pile body, the prestressed steel bars are arranged along the length direction of the pile body, one end of the prestressed steel bar close to the top end of the pile body is provided with a tensioning sleeve, a plurality of the prestressed steel bars form a square ring, and the bundled steel bars are sleeved outside the square ring formed by the plurality of the prestressed steel bars.

[0011] By adopting the technical scheme, the plurality of bundled steel bars are sleeved outside the square ring formed by the plurality of the prestressed steel bars, so as to form the prestressed steel reinforcement cage, the tensioning sleeve on the prestressed steel bar is convenient for being connected with the tensioning screw on the tensioning machine, and the prestressed steel bar is convenient for being tensioned.

[0012] Optionally, the anchoring steel reinforcement cage comprises a plurality of anchoring steel bars forming a ring and a stirrup sleeved outside the ring formed by the plurality of anchoring steel bars, the anchoring steel bars are arranged in parallel with the prestressed steel bars, one end of the anchoring steel bar close to the pile body is provided with an anchoring hook, the anchoring hook is connected with the prestressed steel reinforcement cage, the stirrup is provided with a plurality of anchoring hooks along the length direction of the anchoring steel bar, and the stirrup is pre-buried in the pile body.

[0013] By adopting the technical scheme, the plurality of anchoring steel bars are clamped by the plurality of stirrups, so as to form the anchoring steel reinforcement cage, the anchoring steel bars are connected with the prestressed steel bars through the anchoring hooks, so as to realize reliable connection between the anchoring steel reinforcement cage and the prestressed steel reinforcement cage, improve the connection strength between the anchoring steel bars and the pile body, and finally help to improve the connection strength between the anchoring steel reinforcement cage and the pile cap.

[0014] Optionally, the anchoring hook comprises a connecting part connected with the anchoring steel bar end part and a fixing part connected with the connecting part, the fixing part is arranged in parallel with the prestressed steel rod, and the fixing part is bound with the prestressed steel cage by steel wire.

[0015] By adopting the technical scheme, the fixing part arranged in parallel with the prestressed steel rod facilitates the binding of the anchoring hook and the prestressed steel rod. The connecting part is arranged between the prestressed steel rod and the anchoring steel bar, so that the connecting part is perpendicular to the length direction of the pile body. After the pile body is formed, the connecting part limits the anchoring steel bar, so that the anchoring steel bar is not easy to move relative to the pile body, and the strength of the anchoring steel bar is improved.

[0016] Optionally, the pile cap comprises a connecting plate and a cap body prefabricated on the connecting plate, the periphery of the pile cap is flush with the top end of the pile body, connection grooves are arranged at four corners of the cap body along the length direction of the pile body, the connection grooves penetrate through the cap body, a connecting hole corresponding to each connection groove is arranged on the connecting plate, and the bolt is located in the connection groove and is screwed with the tensioning sleeve.

[0017] By adopting the technical scheme, the periphery of the pile cap is flush with the periphery of the pile body, so that the pile cap does not protrude from the pile body, facilitating transportation and stacking. The connection groove provides a mounting point for the bolt, so that the bolt is screwed with the tensioning sleeve provided on the prestressed steel cage, the four corners of the pile cap and the four corners of the top end of the pile body are connected, the pile cap is aligned with the pile body through four-point positioning, and the installation and disassembly of the pile cap are facilitated.

[0018] Only the connection grooves are arranged at the four corners of the cap body, so that the contact area between the pile cap and the pile body is large, the bearing area of the pile cap is large, and pile pressing is facilitated. Meanwhile, the pile cap facilitates pile delivery. When the first pile body does not reach the set elevation after being driven into the ground, the next pile body directly abuts against the pile cap, so that the first pile body is driven to the set elevation, and the construction efficiency is improved.

[0019] Optionally, the pile cap comprises a connecting plate and a cap body prefabricated on the connecting plate, the periphery of the connecting plate is flush with the top end of the pile body, opposite sides of the cap body are flush with the connecting plate, and the remaining two opposite sides are away from the edge of the connecting plate. A row of connecting holes is arranged on the connecting plate at two sides in the length direction of the cap body, and the bolt is screwed with the tensioning sleeve through the connecting hole.

[0020] By adopting the technical scheme, the cap body is arranged in the shape of a cuboid with a short side shorter than the side length of the connecting plate. The technical scheme is generally used in the case that the top end cross section of the pile body is large, raw material consumption is reduced while use effect is ensured, and the connecting points of the connecting plate and the pile body are more, and the connection is more reliable.

[0021] Optionally, the four corners of the pile cap are flush with the four corners of the pile body, and a connecting groove is formed at each of the four corners of the pile cap, and a through hole is formed in the side wall of the connecting groove close to the side wall of the pile body, and the bolt passes through the through hole and is threadedly connected with the tension sleeve.

[0022] By adopting the above technical scheme, the connecting grooves are arranged at the four corners of the cap body, and the head of the bolt abuts against the side wall of the connecting groove, so that the force of the bolt acts on the cap body, and the connecting plate is omitted, thereby reducing the production cost.

[0023] Optionally, a cover plate is arranged at the opening of the through hole.

[0024] By adopting the above technical scheme, the opening of the through hole is sealed by the cover plate, and the possibility of impurities falling into the through hole is reduced.

[0025] In the second aspect, a prefabricated pile construction method with a pile cap adopts the following technical scheme:

[0026] A prefabricated pile construction method with a pile cap comprises the following steps:

[0027] S1, manufacturing a prestressed steel cage and an anchoring steel cage;

[0028] S2, placing the prestressed steel cage in the mold, connecting the tension sleeve with the tensioning machine, and tensioning the prestressed steel rod;

[0029] S3, pouring the pile body, and after molding, the pile body is cured and demolded; meanwhile, the pile cap is manufactured;

[0030] S4, assembling the pile body and the pile cap into a product;

[0031] S5, detecting the pile body, and after the detection is qualified, transporting the pile body to the engineering site;

[0032] S6, using the static pressure method to perform pile sinking construction;

[0033] S7, excavating the earthwork to the bottom of the foundation;

[0034] S8, removing the pile cap.

[0035] By adopting the above technical scheme, the pile body and the pile cap are prefabricated synchronously, and the prefabricated pile body and the pile cap are directly assembled together, and then transported, and after reaching the site, the pile cap is directly pressed to sink the pile, and after the pile body is punched to the set height, the pile cap is removed, so that the anchoring steel is directly exposed, which not only makes the process simpler, but also improves the connection strength.

[0036] Optionally, after the pile cap is removed in S8, the pile cap is detected, and if the pile cap meets the conditions for continued use, the pile cap is recycled.

[0037] By adopting the technical scheme, the pile cap is detected on site, and recycling is performed according to the situation, so that the effects of energy saving and environmental protection and reducing engineering cost are achieved.

[0038] To sum up, the present application has at least one of the following beneficial technical effects:

[0039] 1. A pile cap with a through hole is detachably connected to the top end of a pile body, an anchoring steel reinforcement cage is arranged in the pile body, and the anchoring steel reinforcement cage extends out of the central position of the top end of the pile body, thereby reducing the influence on the tensioning of the prestressed steel reinforcement cage, and the anchoring steel reinforcement cage is partially extended out of the pile body and is inserted and matched with the through hole, so that in the construction of a precast pile, the pile body with the pile cap is directly driven to a set elevation, and then the pile cap is removed, the anchoring steel reinforcement cage is directly anchored on the steel reinforcement cage of the pile cap, and then the exposed anchoring steel reinforcement cage is poured together with the pile cap.

[0040] Firstly, the anchoring steel reinforcement cage extended out of the pile body eliminates the process of pile breaking, reduces the engineering cost, and at the same time, the pile body remains intact and is not damaged. Secondly, the anchoring steel reinforcement cage is partially pre-buried in the pile body, thereby the anchoring steel reinforcement cage has high strength, and the connection between the pile body and the pile cap is firm and reliable. In addition, in the process of pile body transportation, hoisting, sinking, and earth excavation construction, the anchoring steel reinforcement cage is protected by the pile cap and is not easily damaged, thereby reducing the loss of the pile body. Finally, when the pile cap is removed, if the standard of reusing is met, the pile cap can be reused, thereby further reducing resource waste and reducing engineering cost.

[0041] 2. The periphery of the pile cap is flush with the periphery of the pile body, so that the pile cap does not protrude out of the pile body, thereby facilitating transportation and stacking. The connecting grooves provide mounting points for the bolts, thereby facilitating the threaded connection of the bolts penetrating through the pile cap and the tensioning sleeve provided on the prestressed steel reinforcement cage, connecting the four corners of the pile cap and the four corners of the top end of the pile body, aligning the pile cap and the pile body through four-point positioning, facilitating the installation and removal of the pile cap. The connecting grooves are arranged only at the four corners of the cap body, so that the contact area between the pile cap and the pile body is large, the bearing area of the pile cap is large, and the pile is facilitated to be pressed. At the same time, it is also convenient to use the pile to send the pile. When the first pile body is driven into the ground and does not reach the set elevation, the next pile body directly abuts against the pile cap, so that the first pile body is driven to the set elevation, thereby improving the efficiency of construction.

[0042] 3. The precast pile body and the pile cap are simultaneously precast, and the precast pile body and the pile cap are directly assembled together, and then transported. After arriving at the site, the pile cap is directly pressed to send the pile, and after the pile body is driven to the set elevation, the pile cap is removed, so that the anchoring steel reinforcement is directly exposed. Not only is the process simpler, but also the connection strength is improved. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 is a schematic diagram of the overall structure of embodiment 1 of the present application.

[0044] Figure 2 is a schematic diagram of prestressed reinforcement cage and anchoring reinforcement cage structure in embodiment 1 of the present application.

[0045] Figure 3 is a schematic diagram of anchoring reinforcement cage and pile body cooperation relationship in embodiment 1 of the present application.

[0046] Figure 4 is a schematic diagram of pile cap structure in embodiment 1 of the present application.

[0047] Figure 5 is a schematic diagram of the overall structure of embodiment 2 of the present application.

[0048] Figure 6 is a schematic diagram of the overall structure of embodiment 3 of the present application.

[0049] Explanation of reference signs:

[0050] 1, pile body; 2, pile cap; 21, connecting plate; 22, cap body; 23, connecting groove; 24, through hole; 25, connecting hole; 26, cover plate; 27, communication hole; 3, prestressed reinforcement cage; 31, prestressed steel bar; 311, tensioning sleeve; 32, bundled wire; 4, anchoring reinforcement cage; 41, anchoring reinforcement; 42, stirrup; 43, anchoring hook; 431, connecting part; 432, fixing part; 5, bolt. DETAILED DESCRIPTION

[0051] The following will be described in detail with reference to the accompanying drawings. Figures 1-6 The present application will be further described in detail.

[0052] Embodiment 1

[0053] The embodiment of the present application discloses a prefabricated pile with a pile cap.

[0054] Referring to Figure 1 and Figure 2 , a prefabricated pile with a pile cap includes a pile body 1 and a pile cap 2, a prestressed reinforcement cage 3 and an anchoring reinforcement cage 4 are pre-buried inside the pile body 1, one end of the prestressed reinforcement cage 3 is flush with the top end of the pile body 1, the anchoring reinforcement cage 4 is connected to the inner circle of the prestressed reinforcement cage 3, and the anchoring reinforcement cage 4 extends out of the center position of the top end of the pile body 1. The pile cap 2 is located at the top of the pile body 1, the periphery of the pile cap 2 is flush with the periphery of the pile body 1, a circular through hole 24 is formed on the pile cap 2 along the length direction of the pile body 1, the part of the anchoring reinforcement cage 4 extending out of the pile body 1 is located inside the through hole 24, and the pile cap 2 is connected with the prestressed reinforcement cage 3 through a bolt 5.

[0055] Referring to Figure 1 and Figure 2In the pile body 1 construction, the pile body 1 with the pile cap 2 is directly driven to the set elevation, and then the pile cap 2 is removed, the anchoring steel reinforcement cage 4 is directly anchored on the steel reinforcement cage of the pile cap, and then the exposed anchoring steel reinforcement cage 4 is poured together with the pile cap.

[0056] With reference to Figure 2 and Figure 3 , the prestressed steel reinforcement cage 3 includes prestressed steel bars 31 and bundled steel bars 32, the prestressed steel bars 31 are arranged along the length direction of the pile body 1, and the prestressed steel bars 31 are arranged around the pile body 1, and eight are taken as an example in the embodiment, the prestressed steel bars 31 are arranged along the length direction of the pile body 1, and one end of each prestressed steel bar 31 close to the top end of the pile body 1 is fixedly provided with a tensioning sleeve 311, the end of the tensioning sleeve 311 is flush with the pile body 1, and the tensioning sleeve 311 is provided with an internal threaded hole. Eight prestressed steel bars 31 form a square ring, the bundled steel bars 32 are sleeved outside the square ring formed by the prestressed steel bars 31, the bundled steel bars 32 are arranged along the length direction of the prestressed steel bars 31, and the bundled steel bars 32 are bound together with the prestressed steel bars 31 by steel wires.

[0057] With reference to Figure 2 and Figure 3 , the anchoring steel reinforcement cage 4 includes anchoring steel bars 41 and stirrups 42, the anchoring steel bars 41 are arranged in parallel with the prestressed steel bars 31, the anchoring steel bars 41 are arranged in plurality, six are taken as an example in the embodiment, and the anchoring steel bars 41 partially extend out of the pile body 1. Six anchoring steel bars 41 form a circular ring, the stirrups 42 are sleeved outside the ring formed by the six anchoring steel bars 41, the stirrups 42 are arranged along the length direction of the anchoring steel bars 41, the stirrups 42 are located inside the pile body 1, and the stirrups 42 are bound together with the anchoring steel bars 41 by steel wires.

[0058] With reference to Figure 2 and Figure 3 , one end of each anchoring steel bar 41 close to the inside of the prestressed steel reinforcement cage 3 is integrally formed with an anchoring hook 43, each anchoring hook 43 includes an integrally formed connecting part 431 and a fixing part 432, the fixing part 432 is arranged in parallel with the prestressed steel bars 31 and abuts against the prestressed steel bars 31, and the fixing part 432 is bound with the prestressed steel reinforcement cage 3 by steel wires. One end of the connecting part 431 is connected with the anchoring steel bar 41, the other end is connected with the fixing part 432, and the connecting part 431 is arranged perpendicularly to the anchoring steel bar 41.

[0059] With reference to Figure 1 and Figure 4The pile cap 2 comprises a connecting plate 21 and a cap body 22, the connecting plate 21 is a steel plate with a thickness of 8 mm in the embodiment, the cap body 22 is made of reinforced concrete, and the connecting plate 21 and the cap body 22 are prefabricated together. The periphery of the pile cap 2 is flush with the top end of the pile body 1, the cap body 22 is provided with connecting grooves 23 at four corners thereof along the length direction of the pile body 1, the connecting grooves 23 penetrate through the cap body 22, the connecting plate 21 is provided with connecting holes 25 corresponding to each connecting groove 23, the bolt 5 is located in the connecting groove 23, and the bolt 5 penetrates through the connecting hole 25 and is threadedly connected with the tension sleeve 311.

[0060] With reference to Figure 1 , Figure 2 and Figure 4 , after the pile body 1 is formed, the pile cap 2 is placed on the top of the pile body 1, the exposed part of the anchoring reinforcement cage 4 is inserted into the through hole 24 in a fit manner, then the connecting hole 25 is aligned with the tension sleeve 311, and the bolt 5 is connected with the tension sleeve 311 provided on the prestressed steel bar 31, so that the pile body 1 and the pile cap 2 are assembled. In order to seal the opening of the through hole 24, a circular cover plate 26 is arranged at the opening of the through hole 24, the cover plate 26 can be made of rubber or plastic, and is directly fixed by the friction force between the cover plate 26 and the side wall of the through hole 24.

[0061] The implementation principle of the prefabricated pile with a pile cap in the embodiment is that the anchoring reinforcement 41 is embedded in the pile body 1, the through hole 24 that is inserted into the anchoring reinforcement 41 is arranged on the pile cap 2, the pile body 1 and the pile cap 2 are prefabricated separately, then are connected together by the bolt 5, and the anchoring reinforcement 41 is protected by the pile cap 2. In the prefabricated pile construction, the pile body 1 with the pile cap 2 is directly driven to the set elevation, and then the anchoring reinforcement 41 is poured together with the pile cap 2 and the pile cap 2 is removed. While ensuring firm and reliable connection, the process of breaking the pile is omitted, and the engineering cost is reduced. Meanwhile, the pile cap 2 can be reused after being removed, further reducing resource waste and reducing the engineering cost.

[0062] The embodiment of the application further discloses a prefabricated pile construction method with a pile cap.

[0063] The prefabricated pile construction method with a pile cap comprises the following steps.

[0064] S1, manufacturing a prestressed reinforcement cage 3 and an anchoring reinforcement cage 4;

[0065] S2, placing the prestressed reinforcement cage 3 in a mold, connecting the tension sleeve 311 by a tensioning machine, and tensioning the prestressed steel bar 31;

[0066] S3, pouring the pile body 1, curing and demolding the pile body 1 after being formed, and manufacturing the pile cap 2;

[0067] S4, assembling the pile body 1 and the pile cap 2 into a product;

[0068] S5, detecting the pile body 1, and transporting to the construction site after passing the detection;

[0069] S6, using the static pressure method to carry out pile sinking construction;

[0070] S7, excavating the earthwork to the bottom of the foundation;

[0071] S8, removing the pile cap 2, and detecting the removed pile cap 2, if the pile cap 2 meets the conditions for continued use, recycling the pile cap 2.

[0072] The implementation principle of the prefabricated pile construction method with a pile cap is that the pile body 1 and the pile cap 2 are prefabricated synchronously, then the prefabricated pile body 1 and the pile cap 2 are assembled and transported to the site, then the pile cap 2 is directly pressed and the pile is sent, the pile body 1 is removed after the pile cap 2 is removed after the pile body 1 is punched to the set height, so that the anchoring steel bar 41 is directly exposed, which ensures that the pile body 1 and the pile cap are firmly and reliably connected, and reduces the process of breaking the pile. The pile cap 2 on the site is detected and recycled according to the situation, so as to achieve the effect of energy saving and environmental protection, and reduce the engineering cost.

[0073] Embodiment 2

[0074] Referring to Figure 5 The difference between this embodiment and embodiment 1 is that the pile cap 2 comprises a connecting plate 21 and a cap body 22, the connecting plate 21 of this embodiment is a steel plate with a thickness of 8mm, the cap body 22 is made of reinforced concrete, and the connecting plate 21 and the cap body 22 are prefabricated together. The periphery of the connecting plate 21 is flush with the top end of the pile body 1, the cap body 22 is arranged in the shape of a cuboid, the length of the cap body 22 is consistent with the length of the connecting plate 21, so that a distance is left between the two sides of the cap body 22 in the length direction and the side edges of the connecting plate 21. A row of connecting holes 25 are arranged on the connecting plate 21 near the two sides of the cap body 22 in the length direction, and three connecting holes 25 are taken as an example in this embodiment, and a single connecting hole 25 corresponds to a single tensioning sleeve 311. The bolt 5 is arranged on the connecting plate 21, and the bolt 5 passes through the connecting hole 25 and is threadedly connected with the tensioning sleeve 311.

[0075] The implementation principle of embodiment 2 is that the cap body 22 is arranged in the shape of a cuboid, which is generally used in the case that the top end cross section of the pile body 1 is large, the use amount of raw materials is reduced under the condition of ensuring the use effect, and the connecting points of the connecting plate 21 and the pile body 1 are more, and the connection is more reliable.

[0076] Embodiment 3

[0077] Referring to Figure 6The embodiment is different from the embodiment 1 in that the pile cap 2 is entirely prefabricated by reinforced concrete, the periphery of the pile cap 2 is flush with the periphery of the pile body 1, connecting grooves 23 are formed at four corners of the pile cap 2, a through hole 27 is formed on the side wall of each connecting groove 23 close to the pile body 1, and the bolt 5 passes through the through hole 27 and is threadedly connected with the tension sleeve 311.

[0078] The principle of the embodiment 3 is that the connecting plate 21 is omitted compared with the embodiment 1, and the non-through connecting grooves 23 are directly arranged at four corners of the cap body 22, so that the head of the bolt 5 abuts against the side wall of the connecting groove 23, and the production cost is reduced.

[0079] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A precast pile with a pile cap, characterized by: The utility model provides a pile body (1) and the pile cap (2) of setting in the top end of pile body (1), pre-embedded prestressed reinforcement cage (3) and anchor reinforcement cage (4) in the inside of pile body (1), a plurality of anchor reinforcement (41) and hoop (42) of setting in the outside of a plurality of anchor reinforcement (41) form the anchor reinforcement cage (4) of annular, anchor reinforcement (41) and hoop (42) are distributed in the inside center position of a plurality of prestressed steel bar (31) and a plurality of bundle of steel (32) enclose the cage, one end of prestressed reinforcement cage (3) is flush with the top end of pile body (1), anchor reinforcement cage (4) is connected on prestressed reinforcement cage (3), anchor reinforcement cage (4) extends out the top end center position of pile body (1), the pile cap (2) is set up with the through -hole (24) on, the part of anchor reinforcement cage (4) extending out the pile body (1) is inserted with the through -hole (24) and is matched, the pile cap (2) is connected with prestressed reinforcement cage (3) through bolt (5), prestressed reinforcement cage (3) includes a plurality of prestressed steel bar (31) around the pile body (1) is arranged and a plurality of bundle of steel (32) along the length direction of the pile body (1) is arranged, the prestressed steel bar (31) is arranged along the length direction of the pile body (1), and the prestressed steel bar (31) is provided with tensioning sleeve (311) at one end close to the top end of the pile body (1), a plurality of the prestressed steel bar (31) encloses square ring, and the bundle of steel (32) is set in the outside of a plurality of the prestressed steel bar (31) encloses square ring, every anchor reinforcement (41) is integrally formed with anchor hook (43) at one end close to the inside of prestressed reinforcement cage (3), and every anchor hook (43) includes integrally formed connecting portion (431) and fixed portion (432), fixed portion (432) is arranged in parallel with prestressed steel bar (31) and is in contact with prestressed steel bar (31), and fixed portion (432) is tied with prestressed reinforcement cage (3) through steel wire, one end of connecting portion (431) is connected with anchor reinforcement (41), and the other end is connected with fixed portion (432), and connecting portion (431) is arranged perpendicularly to anchor reinforcement (41), the pile cap (2) includes connecting plate (21) and cap body (22), and the cap body (22) is of reinforced concrete material, and connecting plate (21) and cap body (22) are prefabricated together, the top end of pile body (1) is flush with the periphery of pile cap (2), and the connecting slot (23) is set up in the length direction of the pile body (1) at the four corners of cap body (22), the connecting slot (23) penetrates cap body (22), and the connecting hole (25) is set up on connecting plate (21) corresponding every connecting slot (23), the bolt (5) is located in the inside of connecting slot (23), the bolt (5) passes through connecting hole (25) and is connected with tensioning sleeve (311) threadedly,After the pile body (1) is formed, the pile cap (2) is placed on the top of the pile body (1), the exposed part of the anchoring steel reinforcement cage (4) is inserted into the through hole (24) in a matching mode, then the connecting hole (25) is aligned with the tensioning sleeve (311), and the tensioning sleeve (311) on the prestressed steel rod (31) is connected through the bolt (5), so that the assembly of the pile body (1) and the pile cap (2) is completed.

2. A precast pile with a pile cap according to claim 1, characterized in that: The pile cap (2) is flush with the periphery of the pile body (1), and a connecting groove (23) is arranged at each corner of the pile cap (2), and a communication hole (27) is arranged on the side wall of the pile body (1) close to the connecting groove (23), and the bolt (5) passes through the communication hole (27) and is threadedly connected with the tension sleeve (311).

3. A precast pile with pile cap according to claim 1, characterized in that: A cover plate (26) is arranged at the opening of the through hole (24).

4. A method of constructing a precast pile with a pile cap as claimed in any one of claims 1 to 3: characterised in that, The method comprises the following steps: S1, manufacturing prestressed steel bar cage (3) and anchoring steel bar cage (4); S2, placing the prestressed steel bar cage (3) in a mold, connecting the tension sleeve (311) through a tensioning machine, and tensioning the prestressed steel bar (31); S3, pouring the pile body (1), curing and demolding the pile body (1) after molding, and manufacturing the pile cap (2) at the same time; S4, assembling the pile body (1) and the pile cap (2) into a product; S5, detecting the pile body (1), and transporting the pile body (1) to a construction site after the detection is qualified; S6, using the static pressure method to carry out pile sinking construction; S7, excavating earthwork to the bottom of the foundation; S8, removing the pile cap (2).

5. The method of claim 4, wherein: After the pile cap (2) is removed in S8, the pile cap (2) is detected, and if the pile cap (2) meets the conditions for continued use, the pile cap (2) is recycled.

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