CN217536935U - A crowded device that expands of joint for PHC tubular pile - Google Patents

Abstract

The utility model provides a crowded device that expands of joint for PHC tubular pile, including connecting cylinder, crowded make-up machine, window piece, collet that expands, the vertical fastening of connecting cylinder sets up mobilizable formula window piece between two PHC tubular piles on the lateral wall of connecting cylinder, and the collet is located the below of connecting cylinder. The PHC pipe pile joint is squeezed and expanded by lifting the vertical rod of the squeezing and expanding forming machine upwards, and concrete is poured into the squeezing and expanding cavity through the hollow vertical rod with scales, so that the concrete expanding head is formed. The utility model discloses compensate the shortcoming that the PHC tubular pile can not crowded expand, enlarged the range of application of PHC tubular pile, increased substantially the resistance to plucking and the compressive capacity of PHC tubular pile to can realize crowded dual function who expands the shaping and pour the concrete simultaneously, the location is accurate, and it is controllable to pour the concrete volume, convenient high-efficient.

Description

A crowded device that expands of joint for PHC tubular pile

Technical Field

The utility model relates to a prestressing force high strength concrete pipe pile (PHC tubular pile) technical field among the civil engineering, concretely relates to crowded device that expands of joint for PHC tubular pile.

Background

Piles can be classified into cast-in-place piles and precast piles according to construction methods. In the current engineering practice of cast-in-place piles, in order to improve the bearing performance of the piles, the side frictional resistance is increased by additionally arranging a bearing disc or a bearing branch, so that the stress mechanism of the common equal-diameter cast-in-place bored pile is changed, and the cast-in-place pile is called as an extruded and expanded support disc pile. At present, the squeezed branch pile can only be applied to a cast-in-place pile, and the application range is limited.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems of the traditional extruding and expanding branch pile, the utility model provides a joint extruding and expanding device for PHC tubular pile, which comprises a connecting cylinder, a window sheet connected with the side wall of the connecting cylinder and an extruding and expanding forming machine;

the connecting cylinder is used for being fixed at the end part of the PHC tubular pile;

the squeezing and expanding forming machine is positioned in the connecting cylinder and used for pushing the window sheet so as to enable the window sheet to be opened outwards relative to the connecting cylinder.

Preferably, the window sheet is connected to the side wall of the connecting cylinder along one axial end of the connecting cylinder, and the window sheet can be opened outwards along the other axial end of the connecting cylinder.

Preferably, the window sheet is an arc-shaped plate or a flat plate, and the outline shape comprises a rectangle.

Preferably, the inner wall of the window sheet is provided with a bulge serving as a stress point.

Preferably, the connecting cylinder is a hollow cylinder, a through hole is formed in the side wall of the connecting cylinder, and the window sheet is located in the through hole.

Preferably, the through-hole shape comprises a rectangle.

Preferably, the outer diameter and/or the inner diameter of the connecting cylinder are/is smaller than those of the PHC pile.

Preferably, still include the collet, the collet is located the PHC tubular pile, and the opening is towards and is close to the connecting cylinder.

Preferably, the bottom support is bowl-shaped.

Preferably, the connector barrel is integral with the louvers by notching the side walls of the connector barrel to form the louvers.

Preferably, the window piece is connected with the side wall of the connecting cylinder through a rotating shaft.

Preferably, the extrusion forming machine comprises a vertical rod, a steel wire and a working arm;

the vertical rod is taken as a central shaft, and the work arms are uniformly distributed on the periphery of the vertical rod at equal angles;

one end of the steel wire is connected with the vertical rod, and the other end of the steel wire is connected with one end of the working arm.

Preferably, the stem is hollow.

Preferably, the surface of the vertical rod is provided with scales.

Preferably, one end of the working arm is arc-shaped, and the other end of the working arm is provided with a chamfer.

Preferably, the chamfer and the steel wire point to two sides of the arm.

Preferably, the extrusion-expansion forming machine further comprises a hoop, one end of the steel wire is connected with the vertical rod through the hoop, and the hoop is sleeved on the vertical rod and can move along the axial direction of the vertical rod.

Preferably, the extrusion-expansion forming machine further comprises a top seat and a pin bolt;

one end of the vertical rod is fixed on the top seat;

the other end of the arm is hinged to the top seat through the pin bolt.

Preferably, the footstock is that two plectanes coaxial line fastening are in the same place, the external diameter of plectane is less than PHC tubular pile internal diameter.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a crowded device that expands of joint for PHC tubular pile supports through crowded make-up machine that expands and pushes away the window sheet that links to each other with the connecting cylinder lateral wall, forms crowded space that expands to remedy the shortcoming that PHC tubular pile can not crowded expand, enlarged the crowded range of application that expands a dish stake of tradition.

Drawings

Fig. 1 is a schematic structural view of a joint squeezing and expanding device provided by an embodiment of the present invention when a window is closed;

fig. 2 is a schematic structural view of the joint squeezing and expanding device provided by the embodiment of the present invention after squeezing and expanding;

fig. 3 is a schematic structural view of an extruding and expanding forming machine provided by the embodiment of the present invention;

FIG. 4 isbase:Sub>A cross-sectional view of section A-A of FIG. 2;

FIG. 5 is a cross-sectional view of section B-B of FIG. 2;

fig. 6 is a schematic structural view of a top seat of an extruding and expanding forming machine provided in an embodiment of the present invention;

FIG. 7 is a cross-sectional view of section C-C of FIG. 2;

fig. 8 is a schematic structural view of a first structure of a window piece connected to a connecting cylinder in a joint squeezing device according to an embodiment of the present invention;

fig. 9 is a schematic structural view of a second structure of a window piece connected to a connecting cylinder in a joint squeezing and expanding device according to an embodiment of the present invention;

fig. 10 is a schematic view of a hinge joint structure of a second structure in which a window is connected to a connecting cylinder in a joint squeezing device according to an embodiment of the present invention;

fig. 11 is a schematic view of a collet structure provided in an embodiment of the present invention;

fig. 12 is a cross-sectional view of section D-D in fig. 2.

In the figure, 1-a squeezing and expanding forming machine, 2-PHC tubular piles, 3-a bottom plate, 4-window sheets, 5-a connecting cylinder, 6-a bottom support, 7-a hoop, 8-a tool arm, 9-a pin bolt, 10-a steel wire, 11-a top support, 12-a vertical rod, 13-a supporting plate, 14-a supporting piece and 15-a base.

Detailed Description

The construction process of the extruding and expanding support disc pile mainly comprises the steps of drilling and forming a hole, cleaning the hole, installing the extruding and expanding support disc, cleaning the hole for the second time, pouring the pile body and the like, and the method is complex in operation and long in construction period. In the process of drilling the extruded and expanded supporting disc pile, partial sediments are remained at the bottom of the pile hole, and if the sediments cannot be processed in time, the bearing capacity of the pile body after pile forming can be influenced. The soil requirement of the area where the supporting disc is located is high, and the practicability is not high in the sections with large thicknesses of soft soil layers and silt soil layers. The utility model provides a crowded device that expands of joint for PHC tubular pile to above-mentioned problem.

In order to better understand the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings.

As shown in fig. 1, the utility model provides a joint squeezing and expanding device for PHC tubular pile, including connecting cylinder 5, window 4, squeezing and expanding make-up machine 1, collet 6. The connecting cylinder 5 is vertically welded between the two PHC tubular piles 2. The window sheets 4 are uniformly distributed on the side wall of the connecting cylinder 5, the upper ends of the window sheets 4 are connected to the side wall of the connecting cylinder 5, and the lower ends of the window sheets can be opened towards the outer side of the connecting cylinder 5. As shown in fig. 2, the squeezing forming machine 1 is located inside the connecting cylinder 5 and is used for pushing the window plate 4 to be forced to open towards the outside, so as to squeeze and expand the soil around the connecting cylinder 5. The collet 6 is located the PHC tubular pile of lower part, and is close to connecting cylinder 5, and the collet 6 is the bowl form, and the up end at the PHC tubular pile is fixed towards connecting cylinder 5 to the bowl mouth. The bottom support 6 can prevent the concrete from falling to the bottom of the hole when the concrete is poured after squeezing and expanding.

As shown in fig. 3, the extrusion molding machine 1 includes a hoop 7, an arm 8, a bolt 9, a wire 10, a top seat 11, and a vertical rod 12. The vertical rod 12 is vertically fixed on the top seat 11. The base plate 3 is welded to the base 11 on the side of the vertical rods 12. One end of the arm 8 is fixed on the bottom plate 3 through a pin bolt 9, the other end is connected with the hoop 7 through a steel wire 10, and the arm 8 can rotate around the pin bolt 9 with a rotation angle of 0-90 degrees. The hoop 7 is sleeved on the vertical rod 12 and can move along the axial direction of the vertical rod 12, so that the steel wire 10 can also move along the axial direction of the vertical rod 12 along with the hoop 7, thereby tensioning or loosening the arm 8 and realizing the retraction of the arm 8. When the hoop 7 moves towards the direction close to the base 11, the angle between the work arm 8 and the vertical rod 12 is increased, the work arm 8 is opened, and when the hoop 7 moves towards the direction far away from the base 11, the angle between the work arm 8 and the vertical rod 12 is reduced, and the work arm 8 is folded.

As shown in figure 4, the vertical rod 12 is hollow and is made of a hollow steel pipe with the outer diameter of 50mm and the wall thickness of about 4mm, and scales are arranged on the surface of the steel pipe, so that the depth of the extruding and expanding forming machine 1 can be conveniently positioned. The length of the vertical rod 12 is determined according to the length of the upper PHC tubular pile 2, and the vertical rod can be lengthened by a plurality of sections of hollow steel pipes with the length of about 1 m.

One end of the work arm 8 is semicircular and is connected with the bottom plate 3, and the other end of the work arm is provided with a chamfer, and the chamfer and the steel wire 10 point to the two sides of the work arm 8. The chamfer serves to prevent the work arm 8 from interfering with other components inside the connector barrel 5. The length of the working arm 8 is changed along with the diameter of the PHC tubular pile 2, and the range is 0.5D-1.0D, wherein D is the outer diameter of the PHC tubular pile 2. The number of the arm 8 may be the same as the number of the louvers 4, or may be an even number smaller than the number of the louvers 4. After finishing the squeezing and expanding of 2 window sheets, the working arm 8 is aligned to other non-squeezed and expanded diagonal window sheets 4 by rotating the angle of the squeezing and expanding forming machine 1, and all squeezing and expanding work is finished. The arm 8 is made of steel, and as shown in fig. 5, the number of the arms 8 is 4 in the present embodiment.

As shown in fig. 6, the top base 11 is composed of a base 15 and a bottom plate 3, and both the base 15 and the bottom plate 3 are made of round steel plates, and they can be welded together or integrally formed. The outer diameter of the top seat 11 is smaller than the inner diameter of the PHC pile 2 so that the extrusion forming machine 1 can be inserted into the PHC pile 2 in one direction.

The outer diameter of the connecting cylinder 5 is smaller than the outer diameter of the PHC tubular pile 2, the difference value is generally 20-30 mm, and the inner diameter of the connecting cylinder 5 is larger than the inner diameter of the PHC tubular pile 2, so that the end face of the connecting cylinder 5 is welded with the end face of the PHC tubular pile 2 conveniently. The wall thickness of the connecting cylinder 5 is related to the vertical bearing capacity borne by the PHC tubular pile 2, the larger the bearing capacity is, the larger the wall thickness is, the smaller the bearing capacity is, the smaller the wall thickness is, and the wall thickness range is generally 20 mm-30 mm. The height of the connecting cylinder 5 is 0.5D-1.0D, and D is the outer diameter of the PHC tubular pile 2.

The window sheet 4 is rectangular, and the inner wall of the window sheet is provided with a bulge, so that when the extruding and expanding forming machine 1 extrudes and expands, the extruding and expanding forming machine 1 is tightly propped against the bulge, force is transmitted to the window sheet 4, and the window sheet 4 is opened towards the outer side of the connecting cylinder 5. The projection may be formed integrally with the louver 4, or by screwing a screw, pin, or the like directly into the inner wall of the louver 4. As shown in fig. 8 and 9, in the present embodiment, the protrusion on the inner wall of the window 4 is a triangular protrusion, and the protrusion is integrally formed with the window 4. The number of the window sheets 4 is designed according to actual needs, generally not less than 2, preferably even number of the window sheets, so that the window sheets are convenient to be extruded and expanded in pairs. As shown in fig. 7, the window 4 is designed to be 4 sheets in the present embodiment.

The window plate 4 and the connecting cylinder 5 are connected in two ways:

first connection mode

As shown in fig. 8, the connecting cylinder 5 and the louver 4 are integrally connected, and a rectangular groove is formed in the side wall of the connecting cylinder 5, thereby forming the louver 4 in the side wall of the connecting cylinder 5. The rectangular groove on the side wall of the connecting cylinder 5 is not completely opened at one side close to the PHC tubular pile 2, and side wall material with the width of about 10-15 mm in the middle of the side is reserved, so that the window sheet 4 is connected with the side wall of the connecting cylinder 5. The remaining three edges of the rectangular slot are completely open, separating the louvers 4 from the side walls of the connector barrel 5. The connecting cylinder 5 is made of Q355 steel.

Second connection mode

As shown in fig. 9 and 10, the connecting cylinder 5 and the window plate 4 are connected in a split manner. The side wall of the connecting cylinder 5 is provided with a rectangular through hole, the length of the through hole along the axial direction of the connecting cylinder is greater than that of the window piece 4 in the direction, and the width of the through hole is greater than that of the window piece 4. The window piece 4 is hinged and installed in a through hole in the side wall of the connecting cylinder 5 along the axial direction of the connecting cylinder 5 and near one end of the upper PHC tubular pile 2 through a pin. The window 4 can rotate at an angle of 0-180 deg. The connecting cylinder 5 and the window plate 4 are both made of Q355 steel.

The mounting 6 may be formed using a bowl-shaped finish, or the blade 13 may be formed with the support 14, as shown in fig. 11. In order to facilitate local materials, the bottom support 6 can be welded with a steel bar by using a round steel plate. In this embodiment, a round steel plate having a thickness of 4mm to 5mm is used for the support plate 13. As shown in fig. 12, the outer diameter of the round steel plate is slightly smaller than the inner diameter of the PHC pile 2. Support piece 14 is 4 diameter 6mm ~ 8 mm's reinforcing bar, and the one end welding of 4 reinforcing bars is peripheral at the round steel plate, and the other end outwards buckles 90, welds the up end at lower part PHC tubular pile 2.

During construction, the connecting cylinder 5 is firstly welded between the two PHC tubular piles 2, the welding position is the end face of the connecting cylinder 5 and the PHC tubular piles, then the whole welded connecting cylinder 5 and the two PHC tubular piles 2 is driven into the ground in a traditional static pressure or hammering mode, and the driving depth is determined according to specific construction requirements. The opening of the bottom support 6 is upward, the bottom support is placed into the PHC tubular pile 2 below the bottom support, and the upper end of the bottom support 6 is welded on the end face of the PHC tubular pile 2. And (3) tensioning the steel wire 10 to keep the work arm 8 in a furled state, putting down the extrusion and expansion forming machine 1, and marking the putting-down depth through the scale on the surface of the vertical rod 12 until the work arm 8 is positioned below the triangular bulge on the inner wall of the window piece 4. The wire 10 is now released allowing the arm 8 to open under gravity. After the end part of the work arm 8 is contacted with the window piece 4, the vertical rod 12 is upwards tensioned through the hydraulic device, the window piece 4 starts to be opened, the vertical rod 12 is continuously upwards pulled, the work arm 8 is tightly propped against the triangular protrusion on the inner wall of the window piece 4, the vertical force of the vertical rod 12 is transmitted to the window piece 4 through the work arm 8, and the window piece 4 is forced to outwards open the surrounding soil body to form a squeezing cavity. The opening angle of the louver 4 is determined according to the design bearing capacity. After finishing the squeezing and expanding work, the squeezing and expanding forming machine 1 is put down, and at the moment, the steel wire 10 is pulled up through the hoop 7, so that the work arm 8 is drawn close to the vertical rod 12 and is folded. At this time, the extruding and expanding forming machine 1 can be pulled upwards to the upper PHC tubular pile 2. The volume of the cavity at the PHC tubular pile joint after extrusion and expansion can be calculated through the depth of the bottom support 6 and the cavity formed by the expansion movement range of the window sheet 4, concrete is poured into the cavity by utilizing the hollow vertical rod 12, and the concrete and the connecting cylinder 5 are tightly combined into a whole. The volume of the cavity after squeezing and expanding can be calculated through the volume of the bottom support 6 and the opening angle of the window piece 4, and the volume of the poured concrete is the same as the calculated volume of the cavity. The concrete and the connecting cylinder 5 are tightly combined into a whole, and a concrete supporting disc is formed at the joint part of the two PHC tubular piles 2 to play a role of bearing the force jointly by the pile and the soil.

If the window sheets 4 and the connecting cylinder 5 are integrated, the window sheets 4 cannot be closed after being opened, and concrete can directly enter the squeezing and expanding cavity during pouring; if both are split type, accomplish crowded back that expands, window 4 can be closed, crowded cavity that expands this moment has been formed, and there is not soil pressure outside window 4, can crowd window 4 open when concreting, does not influence and pours.

The utility model provides a technical scheme can be used to the crowded demand that expands of tubular pile under the multiple occasion, except being used for the tubular pile to cut a position, also can be used to the tubular pile stake end, installs the connecting cylinder at the tubular pile stake end promptly, utilizes crowded movable window slice 4 of expanding on with the connecting cylinder to crowd and expand, then utilizes the crowded cavity montant that expands the make-up machine to pour the concrete, forms the expansion joint at the bottom of the stake. The utility model provides a technical scheme has compensatied the crowded shortcoming that expands that PHC tubular pile can not, has enlarged the range of application of crowded dish stake of expanding to have crowded shaping and the dual function of cast concrete of expanding, the location is accurate, the concreting volume is controllable, convenient high-efficient. After the PHC tubular pile forms the squeezing and expanding support disc, the side friction resistance of the pile body is increased, the pulling resistance and the pressure resistance of the PHC tubular pile are improved, and meanwhile, the bending resistance and the shearing resistance of the PHC tubular pile foundation can be ensured. The cross section area of the tubular pile is increased through squeezing and expanding, the common bearing effect of pile soil is enhanced, the length of the pile is effectively reduced, meanwhile, the bearing capacity of the pile is greatly improved, and the settlement amount of a pile body can be reduced.

The above description is only exemplary of the invention and is not intended to limit the invention, and any modifications, equivalent alterations, improvements and the like which are made within the spirit and principle of the invention are all included in the scope of the claims which are appended hereto.

Claims (19)

1. A joint squeezing and expanding device for a PHC tubular pile is characterized by comprising a connecting cylinder (5), a window sheet (4) connected with the side wall of the connecting cylinder (5) and a squeezing and expanding forming machine (1);

the connecting cylinder (5) is fixed at the end part of the PHC tubular pile;

the squeezing and expanding forming machine (1) is located in the connecting cylinder (5) and used for pushing the window sheets (4) in a propping mode, so that the window sheets (4) are opened outwards relative to the connecting cylinder (5).

2. The joint squeezing and expanding device for the PHC pipe pile according to claim 1, wherein the window piece (4) is connected to the side wall of the connecting cylinder (5) along one axial end of the connecting cylinder (5), and the window piece (4) is openable to the outside along the other axial end of the connecting cylinder (5).

3. The joint squeezing and expanding device for the PHC pipe pile according to claim 1, wherein the window sheet (4) is an arc-shaped plate or a flat plate, and the outline shape comprises a rectangle.

4. The joint squeezing and expanding device for the PHC pipe pile according to claim 1, characterized in that the inner wall of the window sheet (4) is provided with a bulge as a stress point.

5. The joint squeezing and expanding device for the PHC pipe pile according to claim 1, wherein the connecting cylinder (5) is a hollow cylinder, a through hole is formed in the side wall of the connecting cylinder (5), and the window sheet (4) is located in the through hole.

6. The joint squeezing and expanding device for a PHC pile according to claim 5, wherein the shape of the through hole comprises a rectangle.

7. The joint squeezing and expanding device for the PHC pile according to claim 1, wherein the outer diameter of the connecting cylinder (5) is smaller than that of the PHC pile; and/or the inner diameter of the connecting cylinder (5) is larger than that of the PHC pile.

8. The joint squeezing and expanding device for the PHC pipe pile is characterized by further comprising a bottom support (6), wherein the bottom support (6) is positioned in the PHC pipe pile and close to the connecting cylinder (5).

9. The joint squeezing device for PHC pipe pile according to claim 8, characterized in that the bottom support (6) is bowl-shaped, and the bowl mouth faces to the side of the connecting cylinder (5).

10. The joint squeezing and expanding device for PHC pile according to claim 1, wherein the connecting cylinder (5) is integrated with the window piece (4), and the window piece (4) is formed by notching the side wall of the connecting cylinder (5).

11. The joint squeezing and expanding device for the PHC pipe pile according to claim 1, wherein the window piece (4) is connected with the side wall of the connecting cylinder (5) through a rotating shaft.

12. The joint expanding device for the PHC pipe pile according to claim 1, wherein the expanding forming machine (1) comprises a vertical rod (12), a steel wire (10) and a tool arm (8);

the vertical rod (12) is used as a central shaft, and the working arms (8) are uniformly distributed on the periphery of the vertical rod (12) at equal angles;

one end of the steel wire (10) is connected with the vertical rod (12), and the other end of the steel wire is connected with one end of the arm (8).

13. The joint reaming device for PHC piles according to claim 12, characterized in that the vertical rods (12) are hollow.

14. The joint squeezing device for PHC pile as claimed in claim 12, wherein the surface of the vertical rod (12) is graduated.

15. The joint squeezing and expanding device for the PHC tubular pile as recited in claim 12, wherein one end of the work arm (8) is arc-shaped, and the other end is chamfered.

16. The joint squeezing device for PHC pile as claimed in claim 15, wherein the chamfer and the steel wire (10) are directed to both sides of the arm (8).

17. The joint squeezing and expanding device for the PHC tubular pile according to claim 12, characterized in that the squeezing and expanding forming machine (1) further comprises a hoop (7), one end of the steel wire (10) is connected with the vertical rod (12) through the hoop (7), and the hoop (7) is sleeved on the vertical rod (12) and can move along the axial direction of the vertical rod (12).

18. The joint expanding device for the PHC pipe pile according to claim 12, wherein the expanding and forming machine (1) further comprises a top seat (11) and a pin bolt (9);

one end of the vertical rod (12) is fixed on the top seat (11);

the other end of the work arm (8) is hinged to the top seat (11) through the pin bolt (9).

19. The joint squeezing and expanding device for the PHC tubular pile as recited in claim 18, wherein the top seat (11) is formed by fastening two circular plates together coaxially, and the outer diameter of the circular plates is smaller than the inner diameter of the PHC tubular pile.

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