Connecting structure of prestressed pipe pile and bearing platform

Abstract

The utility model relates to a prestressed pipe pile and bearing platform connecting structure which comprises a pipe pile, a bearing platform and a core grouting column, the bearing platform is arranged at the top end of the pipe pile, the core grouting column is arranged in the pipe pile, a plurality of pulling anchor bars are prefabricated on the core grouting column, an end plate is installed at the top end of the pipe pile, the end plate is an annular plate, and the pulling anchor bars are arranged on the end plate. A cover plate is installed on the end plate, the cover plate covers the end portion of the tubular pile, an avoiding groove is formed in the position, corresponding to the pulling anchor bar, of the cover plate, the core filling column is attached to the cover plate, and the pulling anchor bar penetrates through the avoiding groove and is installed in the bearing platform. The effect of improving the stability of the bearing platform is achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of foundation construction, in particular to a prestressed pipe pile and cap connecting structure. BACKGROUND

[0002] A pipe pile is a foundation engineering component composed of a steel pipe and concrete, which is installed in the ground by being driven or vibrated to sink, and is used to bear the load of a building and transmit it to the ground. According to different manufacturing processes and materials, the pipe pile can be divided into types such as a steel pipe concrete pile, a prestressed concrete pipe pile (PC pipe pile), a prestressed concrete thin-wall pipe pile (PTC pipe pile) and a prestressed high-strength concrete pipe pile (PHC pipe pile).

[0003] A Chinese patent with publication number CN220789737U discloses a large-diameter high-strength prestressed pipe pile structure implanted by drilling, which comprises a pile sinking layer, a pipe pile and a core filling layer. The pile sinking layer is arranged at the bottom of a drilling guide hole. The pipe pile is vertically arranged in the drilling guide hole, and the bottom end of the pipe pile is immersed in the pile sinking layer. The core filling layer is arranged at the top of the pipe pile, and is used to block and fix the pipe pile. The utility model replaces the drilling pile reinforcement cage with a PHC800AB pipe pile, which is pressed to the design elevation at one time. The pile head can extrude the mud at the bottom of the hole, and there is no sediment at the bottom of the pile. In the thick backfill soil layer with poor soil quality, the problems of hole collapse, diameter reduction, hole deviation and thick sediment at the bottom of the hole, which seriously affect the quality of the pile foundation, are eliminated during the construction process. At the same time, the sediment at the bottom of the pile is solved, and the influence of hole wall collapse on the quality of the pile body is reduced. In addition, the extrusion effect of the precast pile construction process can be solved by pressing the PHC800AB pipe pile, and the occurrence of quality accidents such as pile breaking and necking of the cast-in-place pile is reduced.

[0004] According to the related technology in the above, the prior art uses the core filling layer to prefabricate the cap reinforcement, and then uses the cap reinforcement as a connecting piece between the cap and the pipe pile. However, the anti-pulling force of the cap in the prior art only depends on the friction between the core filling layer and the pipe pile. With long-time stress, there is a possibility that the core filling layer moves in the pipe pile, and finally the core filling layer is pulled out, causing the cap to be locally deformed and damaged, and reducing the stability of the cap.

[0005] APPLICATION CONTENT

[0006] In order to improve the stability of the cap, the application provides a prestressed pipe pile and cap connecting structure.

[0007] The prestressed pipe pile and cap connecting structure provided by the application adopts the following technical scheme:

[0008] The utility model relates to a prestressed pipe pile and the connecting structure of platform, including pipe pile, platform and grouting core column, the platform sets up in the pipe pile top, grouting core column sets up in the pipe pile inside, a plurality of drawing anchor bars are prefabricated on the grouting core column, the pipe pile top installs the end plate, the end plate is annular board, installs the apron on the end plate, the apron covers the pipe pile end, the apron is opened to avoid the slot at the position corresponding the drawing anchor bar, the grouting core column fits the apron, the drawing anchor bar passes through the avoidance slot and is installed in the platform inside.

[0009] Through the above technical scheme, by setting the apron, the pipe pile end is blocked, when stressed, the friction between the grouting core column and the inner wall of the pipe pile cooperates with the apron, limiting the movement of the grouting core column, compared with the prior art, the restriction means of the grouting core column movement is increased, so as to reduce the possibility of the grouting core column being pulled out, reduce the possibility of the platform being damaged by local deformation, and improve the stability of the platform.

[0010] Optionally, the pipe pile is prefabricated with a stable anchor bar, a sleeve is welded at the top end of the stable anchor bar, a connecting rod is connected to the top end of the sleeve, a connecting part is provided on the connecting rod, an annular groove is formed between the connecting part and the connecting rod, a through hole and a mounting hole are opened on the end plate corresponding to the position of the sleeve, the through hole is in communication with the mounting hole, and the diameter of the through hole is greater than the diameter of the mounting hole, the diameter of the annular groove is consistent with the inner diameter of the mounting hole, and a locking piece for limiting the movement of the end plate is provided on the connecting part.

[0011] By adopting the above technical scheme, when the pipe pile is made, the connecting rod is first passed through the through hole and then moved into the mounting hole, so that the connecting part is attached to the end plate, and then the end plate is locked by the locking piece. The end plate is placed in the manufacturing mold and filled with concrete. The mold is rolled by centrifugal means to form the pipe pile, and then the finished pipe pile is baked. Therefore, the end plate is prefabricated at the top end of the pipe pile. The cooperation of the annular groove and the mounting hole facilitates the positioning of the connecting rod and ensures the installation accuracy of the stable anchor bar and the end plate.

[0012] Optionally, the connecting part is a threaded segment, the minimum diameter of the connecting part is consistent with the diameter of the connecting rod, the locking piece is a locking nut, the connecting part passes through the apron, and the locking piece is threadedly connected to the connecting part and tightly presses the apron.

[0013] By adopting the above technical scheme, when the apron is installed, the apron is placed on the end plate, the drawing anchor bar passes through the avoidance slot, the connecting part passes through the apron, and the locking piece is rotated to tightly press the apron, thereby achieving the installation of the apron. By tightly pressing the apron with the locking piece, the apron is tightly attached to the end plate, facilitating the subsequent processing of the apron and the end plate.

[0014] Optionally, a lock washer is sleeved on the connecting portion, and the lock washer is located between the locking piece and the cover plate.

[0015] By using the above technical scheme, the foundation settlement causes the pipe pile to settle, which produces vibration, and the locking piece may be shaken off. By arranging the lock washer, the possibility of the locking piece being shaken off is reduced, the cover plate is ensured to stably adhere to the end plate for a long time, and the cover plate is also provided with deformation resistance

[0016] Optionally, a stable ring is connected to the inner ring wall of the end plate, and the pouring core column adheres to the stable ring.

[0017] By using the above technical scheme, the pouring core column is in a pulling state due to the influence of the pile cap, at this time, the friction between the pouring core column and the inner wall of the pipe pile and the cooperation of the cover plate limit the movement of the pouring core column, the middle position of the cover plate will bear the force of the pouring core column, and the cover plate may be deformed. The stable ring is used to assist in limiting the movement of the pouring core column, and the force of the pouring core column on the cover plate is shared, thereby reducing the possibility of deformation of the cover plate.

[0018] Optionally, a plurality of avoiding grooves are uniformly distributed around the axis of the pipe pile, a connecting frame is connected at the avoiding grooves, and a plurality of rib plates are connected between the connecting frame and the cover plate.

[0019] By using the above technical scheme, the avoiding grooves are used to facilitate the pulling of the anchor bar, but the structural strength of the cover plate is reduced in structure. By cooperation of the connecting frame and the rib plate, the stable area near the avoiding grooves is increased, the structural strength of the cover plate is improved, and the possibility of deformation of the cover plate is reduced.

[0020] Optionally, a reinforcing plate is connected between two opposite connecting frames, and the reinforcing plate passes through the center of the cover plate.

[0021] By using the above technical scheme, the reinforcing plate is used to improve the structural strength of the center of the cover plate, and the possibility of deformation of the center of the cover plate is reduced.

[0022] Optionally, the cover plate and the end plate are welded.

[0023] By using the above technical scheme, the cover plate is first tightly adhered to the end plate by the locking piece, thereby providing a stable condition for subsequent welding of the cover plate, and finally the end plate and the cover plate are welded, thereby further stabilizing the installation of the cover plate. Under the premise that the cover plate is not damaged, the pulling resistance of the pouring core column is further improved.

[0024] In summary, the present application has at least one of the following beneficial technical effects:

[0025] 1. By setting the cover plate, the friction between the grouting core column and the inner wall of the pipe pile and the cooperation of the cover plate limit the movement of the grouting core column when stressed, compared with the prior art, the restriction means of the movement of the grouting core column is increased, so as to reduce the possibility of the grouting core column being pulled out, reduce the possibility of the bearing platform being damaged due to local deformation, and improve the stability of the bearing platform. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a sectional view for embodying the pipe pile and the bearing platform connecting structure in the embodiment of the present application.

[0027] Figure 2 is a structural schematic view of the cover plate in the embodiment of the present application.

[0028] Figure 3 is a structural schematic view of the connecting rod in the embodiment of the present application.

[0029] Figure 4 is an explosion view for embodying the pipe pile and the bearing platform connecting structure in the embodiment of the present application.

[0030] Figure 5 is a structural schematic view of the end plate in the embodiment of the present application.

[0031] Figure 6 is a structural schematic view of the cover plate in the embodiment of the present application.

[0032] Reference signs: 1, pipe pile; 11, stable anchor; 12, sleeve; 13, connecting rod; 131, connecting part; 132, annular groove; 133, locking piece; 134, anti-loosening washer; 2, bearing platform; 3, grouting core column; 31, pulling anchor; 4, end plate; 41, through hole; 42, mounting hole; 43, stable ring; 5, cover plate; 51, avoiding groove; 52, connecting frame; 53, rib plate; 54, reinforcing plate. DETAILED DESCRIPTION

[0033] The following will be described in detail in combination with the accompanying Figures 1-6 The present application is further described in detail.

[0034] The embodiment of the present application discloses a prestressed pipe pile and bearing platform connecting structure. Referring to Figure 1 , Figure 2 and Figure 3 , the prestressed pipe pile and bearing platform connecting structure comprises a pipe pile 1, a bearing platform 2 and a grouting core column 3. The top end of the pipe pile 1 is prefabricated with a plurality of stable anchors 11, the top end of the stable anchor 11 is welded with a sleeve 12, the top end of the sleeve 12 is welded with a connecting rod 13, the connecting rod 13 is provided with a connecting part 131, the connecting part 131 is a threaded section, the diameter of the connecting part 131 is greater than the diameter of the connecting rod 13, and the annular groove 132 is formed between the connecting part 131 and the sleeve 12.

[0035] With reference to Figure 2 , Figure 4 and Figure 5 , the top end of the pipe pile 1 is provided with an end plate 4, the end plate 4 is an annular plate, the end plate 4 is provided with a through hole 41 and a mounting hole 42 corresponding to the position of the connecting rod 13, the through hole 41 is in communication with the mounting hole 42, and the diameter of the through hole 41 is greater than the diameter of the mounting hole 42, the diameter of the mounting hole 42 is consistent with the diameter of the annular groove 132, the connecting rod 13 passes through the through hole 41, and the annular groove 132 is fitted in the mounting hole 42.

[0036] With reference to Figure 2 , Figure 4 and Figure 6 , the end plate 4 is provided with a cover plate 5, the cover plate 5 is a circular plate, and covers the top end of the pipe pile 1, the cover plate 5 is provided with a plurality of avoiding grooves 51, the plurality of avoiding grooves 51 are evenly distributed around the axis of the cover plate 5, the cover plate 5 is welded with a connecting frame 52 and a plurality of rib plates 53 at positions corresponding to the groove edges of the avoiding grooves 51, and the rib plates 53 are welded between the connecting frame 52 and the cover plate 5. The reinforcing plate 54 is welded between the two connecting frames 52, and the reinforcing plate 54 passes through the center of the cover plate 5.

[0037] With reference to Figure 2 and Figure 4 , the connecting part 131 passes through the cover plate 5. The connecting part 131 is provided with a locking piece 133, the locking piece 133 is a locking nut, the locking piece 133 is provided with a lock washer 134, the lock washer 134 is located between the locking piece 133 and the cover plate 5, and the locking piece 133 abuts against the lock washer 134. The cover plate 5 is circumferentially welded with the end plate 4.

[0038] When installing the cover plate 5, the cover plate 5 is placed on the end plate 4, the connecting part 131 passes through the cover plate 5, then the lock washer 134 and the locking piece 133 are sequentially sleeved on the connecting part 131, and the locking piece 133 is rotated to press the cover plate 5, and finally the cover plate 5 is welded with the end plate 4, thereby achieving the installation of the cover plate 5.

[0039] With reference to Figure 4 and Figure 5 , the bearing platform 2 is arranged at the top end of the pipe pile 1, and the core column 3 is poured in the pipe pile 1, a plurality of drawing anchor bars 31 are prefabricated on the core column 3, the drawing anchor bars 31 pass through the avoiding grooves 51 and are installed inside the bearing platform 2. The inner annular wall of the end plate 4 is welded with a stabilizing ring 43, and the core column 3 is attached to the cover plate 5 and the stabilizing ring 43.

[0040] The implementation principle of the prestressed pipe pile and the connecting structure of the pile cap is as follows: the pouring core column 3 is poured in the pipe pile 1, the end plate 4 is prefabricated at the top end of the pipe pile 1, the cover plate 5 is placed on the end plate 4, the connecting part 131 penetrates through the cover plate 5, the pulling anchor 31 penetrates through the avoiding groove 51, the locking part 133 is rotated to abut against the cover plate 5, the cover plate 5 is welded on the end plate 4, finally, the pile cap 2 is constructed, the pulling anchor 31 is prefabricated in the pile cap 2, and the pipe pile 1 and the pile cap 2 are constructed.

[0041] The cover plate 5 is arranged to block the end of the pipe pile 1, the friction between the pouring core column 3 and the inner wall of the pipe pile 1 and the cover plate 5 are matched to limit the movement of the pouring core column 3, compared with the prior art, the movement of the pouring core column 3 is limited, the possibility of the pouring core column 3 being pulled out is reduced, the possibility of the pile cap 2 being damaged due to local deformation is reduced, and the stability of the pile cap 2 is improved.

[0042] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so: equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A connection structure between a prestressed pipe pile and a pile cap, comprising a pipe pile (1), a pile cap (2), and a core-filled column (3), wherein the pile cap (2) is disposed at the top of the pipe pile (1), the core-filled column (3) is disposed inside the pipe pile (1), and a plurality of pull-out anchor bars (31) are prefabricated on the core-filled column (3), characterized in that: The pipe pile (1) top end is provided with an end plate (4), the end plate (4) is a ring plate, the end plate (4) is provided with a cover plate (5), the cover plate (5) covers the pipe pile (1) end, the cover plate (5) is provided with a avoiding slot (51) corresponding to the position of the drawing anchor bar (31), the pouring core column (3) is attached to the cover plate (5), the drawing anchor bar (31) passes through the avoiding slot (51), and is installed in the bearing platform (2).

2. The prestressed pipe pile and pile cap connection structure according to claim 1, characterized in that: The pipe pile (1) is prefabricated with a stable anchor bar (11), the top end of the stable anchor bar (11) is welded with a sleeve (12), the top end of the sleeve (12) is connected with a connecting rod (13), the connecting rod (13) is provided with a connecting part (131), the connecting part (131) and the connecting rod (13) form an annular groove (132), the end plate (4) is provided with a through hole (41) and a mounting hole (42) corresponding to the position of the sleeve (12), the through hole (41) and the mounting hole (42) are communicated, and the diameter of the through hole (41) is greater than that of the mounting hole (42), the diameter of the annular groove (132) is consistent with the inner diameter of the mounting hole (42), the connecting part (131) is provided with a locking piece (133) for limiting the movement of the end plate (4), and the connecting rod (13) is located in the mounting hole (42) during installation.

3. The prestressed pipe pile and pile cap connection structure according to claim 2, characterized in that: The connecting part (131) is a threaded segment, the diameter of the connecting part (131) is greater than that of the connecting rod (13), the locking piece (133) is a locking nut, the connecting part (131) passes through the cover plate (5), and the locking piece (133) is threadedly connected on the connecting part (131) and abuts against the cover plate (5).

4. The prestressed pipe pile and pile cap connection structure according to claim 3, characterized in that: The connecting part (131) is provided with a locking washer (134), and the locking washer (134) is located between the locking piece (133) and the cover plate (5).

5. The prestressed pipe pile and pile cap connection structure according to claim 1, characterized in that: The inner ring wall of the end plate (4) is connected with a stable ring (43), and the pouring core column (3) is attached to the stable ring (43).

6. The prestressed pipe pile and pile cap connection structure according to claim 1, characterized in that: A plurality of avoiding slots (51) are evenly distributed around the axis of the pipe pile (1), and the avoiding slots (51) are connected with a connecting frame (52), and a plurality of rib plates (53) are connected between the connecting frame (52) and the cover plate (5).

7. The prestressed pipe pile and pile cap connection structure according to claim 6, characterized in that: Two opposite connecting frames (52) are connected with a reinforcing plate (54), and the reinforcing plate (54) passes through the center of the cover plate (5).

8. The prestressed pipe pile and pile cap connection structure according to claim 1, characterized in that: The cover plate (5) and the end plate (4) are welded.

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