CN212612441U - Prestressed concrete end-plate-free compression-resistant pipe pile tension connecting piece - Google Patents

Abstract

The utility model discloses a prestressed concrete does not have end plate resistance to compression tubular pile and rises and draw connecting piece, include: the expansion shell is provided with a through groove penetrating through two ends, the through groove comprises an extending section and a clamping section, the inner diameter of the clamping section is larger than that of the extending section, one end of the expansion shell, corresponding to the extending section, is provided with a first sleeve, and the first sleeve is provided with an internal thread; the first sealing cover is fixed at one end, corresponding to the clamping section, outside the expansion shell, and a first through hole is formed in the first sealing cover; the expansion connecting pin comprises a connecting section and an expansion section, wherein an expansion groove is formed in the expansion section, the expansion groove axially extends from the end part of the expansion section to the connecting section, the expansion groove divides the expansion section into at least two parts, and the expansion section extends into the expansion shell; the wedge piece, including head and afterbody, its surface inwards draws in gradually by head to afterbody, and the wedge piece stretches into the expansion section along the expansion tank by the afterbody and expands the expansion section, the utility model discloses material saving, simple structure, nevertheless connect more reliably, it is more convenient to use.

Description

Prestressed concrete end-plate-free compression-resistant pipe pile tension connecting piece

Technical Field

The utility model belongs to building engineering foundation pile field, more specifically the utility model relates to a prestressed concrete does not have end plate resistance to compression tubular pile and rises and draw connecting piece that says so.

Background

In the pile foundation engineering such as underground engineering, high-rise buildings, offshore wharf platforms, cable-stayed bridges, suspension bridges, large ship dock baseboards, static load pile testing and the like, the stratum needs to be reinforced in order to balance the underground water buoyancy, and the adopted main measures are that the pipe piles are embedded in the stratum, and the stratum is reinforced by utilizing the tension of the pile foundations and concrete grouting bodies integrated with the pipe piles, so that the stratum forms an integral structure, and the aim of controlling the deformation of the stratum is fulfilled.

The uplift pile has the advantages of being capable of balancing the buoyancy of underground water after being installed, capable of applying prestress and the like, plays an important role in the whole pipe pile system, and is very wide in application.

In Fujian architecture, 03 th 2013, pages 100, 101 and 102 disclose an article named as a connection joint mode of shallow precipitation prestressed high-strength concrete uplift pipe piles, and the article introduces that the joint modes of the existing prestressed pipe piles are mainly divided into three types, namely 1, end plate welding construction; 2. Mechanical thread connection construction; 3. mechanical meshing connection construction; the mechanical meshing connection construction has more obvious advantages compared with the other two joint forms. Referring to fig. 2 and 3 in page 101 of the connection box, the mechanical engagement connection has a structure comprising a connecting pin and a tubular pile with end plates, wherein one end plate is provided with a bolt hole, the other end plate is provided with a square groove, a connecting box is pre-embedded in the square groove, two opposite side surfaces in the connecting box are provided with positioning plates with teeth, a compression spring is arranged between the positioning plates with teeth and the connecting box, and a connecting port is formed between the two positioning plates with teeth; one end of the connecting pin is provided with threads matched with the threads of the bolt hole, and the other end of the connecting pin is provided with teeth.

Cleaning the end plate at the joint before connection, and screwing the round end (threaded end) of the connecting pin into the bolt hole on the end plate one by using a spanner; (2) when pile splicing is carried out, the end plate with the square groove is applied to the upper end of the lower section of tubular pile, the end plate with the bolt hole is used for the lower end of the upper section of tubular pile, the upper section of tubular pile is hoisted, the connecting pin is aligned with each connecting port on the end plate of the lower section of tubular pile, the connecting pin is inserted into the connecting ports immediately, the end plates of the upper section of tubular pile and the lower section of tubular pile are pressed to be contacted, one end of the connecting pin is fixed in the end plate of the upper section of tubular pile in a threaded mode, the other end of the connecting pin extends into the connecting ports, teeth of the connecting pin are matched with the positioning plate with the teeth, the positioning plate with.

Although the structure adopting mechanical meshing connection construction can save the time for connecting the tubular piles on site, the structure still has the following defects: 1. the cost of the connecting box is high, and the manufacturing process is complex; 2. the positioning plate with teeth is difficult to fix (in the vertical direction) in the connecting box; 3. the end plates at the two ends of the tubular pile have different structures, and can be hoisted only after being distinguished during connection, which is troublesome; 4. the size of a connecting port formed between the two positioning plates with the teeth is small, the connecting pins can be smoothly inserted only by being aligned with the connecting pins in all directions, and all the connecting pins are aligned with all the connecting ports one by one at the same time, otherwise, the phenomenon of blocking occurs, so that the connecting pins and the positioning plates with the teeth are damaged, but the whole tubular pile is difficult to align the two quickly and accurately after being vertically lifted, and the time consumption is long.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides a need not to use the end plate when producing the tubular pile, material saving, simple structure, the expansion shell not only can realize the pretension to the PC rod iron, can also be used for the connection of two tubular piles, and is with low costs, but connects more reliably, and it is more convenient to use.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a prestressed concrete does not have end plate resistance to compression tubular pile and rises and draws connecting piece, includes:

the expansion shell is provided with a through groove penetrating through two ends, the through groove comprises an extending section and a clamping section, the inner diameter of the clamping section is larger than that of the extending section, one end of the expansion shell, corresponding to the extending section, is provided with a first sleeve, and the first sleeve is provided with an internal thread;

the first sealing cover is fixed at one end, corresponding to the clamping section, outside the expansion shell, and a first through hole is formed in the first sealing cover;

the expansion connecting pin comprises a connecting section and an expansion section, wherein an expansion groove is formed in the expansion section, the expansion groove axially extends from the end part of the expansion section to the connecting section, the expansion groove divides the expansion section into at least two parts, and the expansion section extends into the expansion shell;

the wedge piece comprises a head part and a tail part, the outer surface of the wedge piece is gradually inwards gathered from the head part to the tail part, and the wedge piece extends into the expansion section from the tail part along the expansion groove to expand the expansion section.

The first sleeve is fixedly provided with a first sealing cover at one end, the first sleeve is internally provided with internal threads, and the first sealing cover is provided with a first through hole; the expansion connecting pin comprises a connecting section and an expansion section, and the connecting section is provided with an external thread matched with the second sleeve.

The cross section of the through groove is circular.

Further the inner diameter of the through groove in the expansion shell is gradually reduced from one end to the other end.

The expansion groove is further in a shape like a Chinese character 'yi' or 'ten'.

Furthermore, a guide rib plate is arranged on the outer surface of the wedge piece, and the guide rib plate extends from the head part to the tail part.

The utility model provides a prestressed concrete does not have end plate resistance to compression tubular pile, includes the concrete main part, the one end of concrete main part is provided with a plurality of expansion shells that distribute along the circumference, and the other end is provided with a plurality of second sleeves that distribute along the circumference, be provided with the PC rod iron in the concrete, the first through-hole of first closing cap and the second through-hole of second closing cap are passed respectively at the both ends of PC rod iron, the both ends of PC rod iron are provided with the end cap.

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

1. the end plate is saved, the material is saved, but the pre-tensioning operation of the PC steel bar and the tight connection between the pipe piles can still be realized;

2. the tension is not easy to pull off during pretensioning, and the loss caused by pulling off is always full;

3. the anti-pulling performance is good, the installation is simple, and the time cost is saved;

4. the fixing pin is strong, does not shift and improves the connection stability of the tubular pile;

5. electric welding pile splicing is not used, so that the pile driving speed is improved, and the construction time is shortened;

6. the cost can be saved, the working efficiency is improved, and the expansion, pulling resistance, positioning and butt joint are integrated.

Drawings

Fig. 1 is a schematic structural view of the prestressed concrete end-plate-free compression-resistant pipe pile tension connecting piece of the utility model;

FIG. 2 is a schematic structural diagram of PC steel bar during pretensioning;

fig. 3 is a schematic view of the structure of an expansion joint pin when two pipe piles are to be connected;

fig. 4 is a schematic structural view of two tubular piles connected together;

FIG. 5 is a schematic view of the wedge with the head portion extending into the expansion slot to expand the expansion section;

figure 6 is a perspective view of the wedge (the expansion slot is cross shaped).

Reference numerals: 1. expanding the shell; 11. a clamping section; 12. an extension section; 2. a wedge; 21. A head portion; 22. a tail portion; 211. a guide rib plate; 3. an expansion connecting pin; 31. an expansion section; 32. A connecting section; 311. an expansion tank; 321. external thread 4, first closing cap; 41. a first through hole; 5. a first sleeve; 6. a second sleeve; 7. a second cover; 71. a second through hole; 8. a PC steel bar; 81. an end cap; 9. expanding and pulling the template; 91. a screw; 10. and (3) concrete.

Detailed Description

The structure of the prestressed concrete endless plate pressure-resistant pipe pile tension-pulling connecting member according to the present invention is further described with reference to fig. 1 to 6.

In the description of the present invention, it should be noted that, for the orientation words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and the positional relationship are indicated based on the orientation or the positional relationship shown in the drawings, and the description is only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the device or the element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and "a plurality" or "a plurality" in the description of the invention means two or more unless a specific definition is explicitly provided.

The utility model provides a prestressed concrete does not have end plate resistance to compression tubular pile and rises and draws connecting piece, includes:

the expansion shell 1 is provided with a through groove penetrating through two ends, the through groove comprises an extending section 12 and a clamping section 11, the inner diameter of the clamping section 11 is larger than that of the extending section 12, a first sleeve 5 is arranged at one end, corresponding to the extending section 12, of the expansion shell 1, and the first sleeve 5 is provided with an internal thread;

the first sealing cover 4 is fixed at one end, corresponding to the clamping section 11, outside the expansion shell 1, and a first through hole 41 is formed in the first sealing cover 4;

the expansion connecting pin 3 comprises a connecting section 32 and an expansion section 31, wherein an expansion groove 311 is formed in the expansion section 31, the expansion groove 311 axially extends from the end part of the expansion section 31 to the direction of the connecting section 32, the expansion groove 311 divides the expansion section 31 into at least two parts, and the expansion section 31 extends into the expansion shell 1;

the wedge 2, including the head 21 and the tail 22, the outer surface is gradually inwardly gathered from the head 21 to the tail 22, the wedge 2 is extended from the tail 22 along the expansion slot 311 into the expansion section 31 to expand the expansion section 31.

In the present exemplary embodiment, the first cover 4 is welded to the expansion shell 1.

The present embodiment preferably further includes a second sleeve 6, one end of the second sleeve 6 is fixed with a second sealing cover 7, the second sleeve 6 has internal threads therein, and the second sealing cover 7 is provided with a second through hole 71; the expansion connecting pin 3 comprises a connecting section 32 and an expansion section 31, wherein the connecting section 32 is provided with an external thread 321 matched with the second sleeve 6.

When the concrete 10 tubular pile is produced, as shown in fig. 2, firstly, two ends of the PC steel rod 8 respectively extend into the first through hole 41 of the first cover 4 and the second through hole 71 of the second cover 7, and two ends of the PC steel rod 8 are headed to form end caps 81; through making two screw rods 91 pass the rise die plate 9 (rise die plate 9 is the appurtenance that the tubular pile factory used when producing the tubular pile) and screw in first sleeve 5 and second sleeve 6 of both sides respectively, make expansion shell 1 and second sleeve 6 to move in opposite directions with PC rod iron 8 tighten, then carry out concreting of concrete 10, including concrete 10 will expand shell 1, second sleeve 6 and PC rod iron 8 are whole to be wrapped up, only make the both ends of first sleeve 5 and second sleeve 6 expose, need not to arrange the end plate, treat that concrete 10 solidifies the back, loosen screw rod 91, the shaping of whole tubular pile is accomplished.

In practice, multiple sets of expansion shells 1, PC steel rods 8 and second sleeves 6 may be arranged along the circumference as required, and in this embodiment, the expansion shells 1 and the second sleeves 6 with the first sleeves 5 are respectively disposed at two ends of the tubular pile, and in fact, the expansion shells 1 with the first sleeves 5 may also be disposed at two ends.

When two sections of tubular piles are connected, (1) a lower section of tubular pile is driven into the ground, so that one end of the expansion shell 1 faces upwards; (2) the connecting end of the expansion connecting pin 3 is screwed in the second sleeve 6 of the upper section tubular pile, the tail part 22 of the wedge piece 2 extends into the expansion groove 311, and the wedge piece 2 is clamped by the expansion groove 311 of the expansion section 31; (3) lifting the upper tubular pile to enable one end with the second sleeve 6 to face downwards, enabling the expansion section 31 of the connecting pin and the wedge pieces 2 to face downwards at the moment, and enabling all heads 21 of the wedge pieces 2 to be aligned with the through grooves of the expansion shell 1 of the lower tubular pile; (4) gradually lowering the upper section of tubular pile to enable the wedge piece 2 to fully extend into the expansion shell 1 until the bottom end of the wedge piece 2 abuts against the surface of the first cover 4 (the end cap 81 of the PC steel rod 8); at this time, the upper tubular pile is continuously lowered, and since the wedge piece 2 has reached the limit position, but the expansion connecting pin 3 is continuously lowered, the wedge piece 2 will continue to extend into the expansion connecting pin 3, and as the length of the wedge piece 2 extending into the expansion connecting pin 3 is greater, the size of the expansion section 31 is greater, so that the outer wall of the expansion section 31 is tightly pressed in the clamping section 11 of the expansion shell 1, and the upper tubular pile is tightly pressed on the lower tubular pile, as shown in fig. 4.

After the expansion section 31 of the expansion connecting pin 3 is expanded, the expansion section is clamped between the wedge piece 2 and the expansion shell 1, if the upper section of tubular pile is subjected to upward buoyancy, the expansion connecting pin 3 is pulled upwards, the expansion section 31 of the expansion connecting pin 3 is completely fixed and cannot be pulled out from the extension section 12 with a small diameter, and the expansion section 31 is connected with the expansion shell 1 and the wedge piece 2 more tightly as the tension force applied to the expansion connecting pin 3 is larger, namely, permanent fixation is realized.

The through groove of the preferred embodiment is circular in cross section, and the corresponding expansion connecting pin 3 and wedge piece 2 are circular as a whole, so that the wedge piece 2 is convenient to align with the expansion shell 1 of the lower section tubular pile after the upper section tubular pile is hoisted.

In this embodiment, the inner diameter of the through groove in the expansion shell 1 is preferably gradually reduced from one end to the other end, the outer surface and the inner surface of the expansion shell 1 in this embodiment are both in a circular truncated cone shape, so that the production is convenient, and when the expansion section 31 is expanded in the expansion section, the contact area between the surface of the expansion section 31 and the inner wall of the expansion shell 1 is large.

The outer surface of the wedge piece 2 is preferably provided with a guide rib plate 211, the guide rib plate 211 extends from the head part 21 to the tail part 22, and when the wedge piece 2 extends into the expansion slot 311 to expand the expansion section 31, the guide rib plate 211 is always positioned in the expansion slot 311 and moves along the expansion slot 311, so that the whole wedge piece 2 can keep a coaxial state with the expansion connecting pin 3, and the deflection of the wedge piece is avoided.

The expansion slot 311 of the preferred embodiment is "ten" shaped, the corresponding guide rib 211 of the wedge 2 is also "ten" shaped, the expansion section 31 is divided into four petals, and when the wedge 2 expands the expansion section 31, the four petals 31 are expanded to be more and more far and respectively outwards to be tightly attached to the inner wall of the expansion shell 1.

Certainly, the expansion groove 311 can also be in a shape of a straight line, the structure is simple, the production and the manufacture are easier, but the expansion section 31 is divided into two petals, after the expansion section is expanded by the wedge 2, the two petals of the expansion section 31 are in contact with and pressed on the surface of the expansion shell 1, the contact area is smaller than that of the four petals, and the firmness degree is slightly weaker than that of the four petals of the expansion section 31.

In the preferred embodiment, the width of the guide rib plate 211 at the tail part 22 of the wedge 2 is smaller than the width of the expansion slot 311, actually, the width of the guide rib plate 211 is approximately equal to the width of the expansion slot 311, and the width of the guide rib plate 211 at the tail part 22 of the wedge 2 is basically unchanged, so that when the wedge 2 is combined with the expansion section 31, the tail part 22 of the wedge 2 can be firstly inserted into the expansion section 31, the guide rib plate 211 is clamped by the expansion slot 311, the wedge 2 is preliminarily fixed in the expansion section 31, at this time, the expansion section 31 cannot be expanded, and the expansion section 31 and the wedge 2 can be smoothly put into the expansion shell 1 together.

The utility model provides a prestressed concrete 10 does not have end plate resistance to compression tubular pile, includes concrete 10 main part, the one end of concrete 10 main part is provided with a plurality of expansion shells 1 that distribute along the circumference, and the other end is provided with a plurality of second sleeves 6 that distribute along the circumference, be provided with PC rod iron 8 in the concrete 10, the first through-hole 41 of first closing cap 4 and the second through-hole 71 of second closing cap 7 are passed respectively at the both ends of PC rod iron 8, the both ends of PC rod iron 8 are provided with end cap 81.

The tubular pile does not have the end plate in this embodiment, utilizes expansion shell 1 and second sleeve 6 fixed with PC rod iron 8 respectively, can enough realize the pretension to PC rod iron 8, can conveniently combine more firmly at two adjacent tubular piles in later stage moreover.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (6)

1. The utility model provides a prestressed concrete does not have end plate resistance to compression tubular pile and rises and draw connecting piece which characterized in that includes:

the expansion shell is provided with a through groove penetrating through two ends, the through groove comprises an extending section and a clamping section, the inner diameter of the clamping section is larger than that of the extending section, one end of the expansion shell, corresponding to the extending section, is provided with a first sleeve, and the first sleeve is provided with an internal thread;

the first sealing cover is fixed at one end, corresponding to the clamping section, outside the expansion shell, and a first through hole is formed in the first sealing cover;

the expansion connecting pin comprises a connecting section and an expansion section, wherein an expansion groove is formed in the expansion section, the expansion groove axially extends from the end part of the expansion section to the connecting section, the expansion groove divides the expansion section into at least two parts, and the expansion section extends into the expansion shell;

the wedge piece comprises a head part and a tail part, the outer surface of the wedge piece is gradually inwards gathered from the head part to the tail part, and the wedge piece extends into the expansion section from the tail part along the expansion groove to expand the expansion section.

2. The prestressed concrete endless plate compression-resistant pipe pile tension connecting member as claimed in claim 1, wherein: the first sleeve is fixedly provided with a first sealing cover at one end, the first sleeve is internally provided with internal threads, and the first sealing cover is provided with a first through hole; the expansion connecting pin comprises a connecting section and an expansion section, and the connecting section is provided with an external thread matched with the second sleeve.

3. The prestressed concrete endless plate compression-resistant pipe pile tension connecting member as claimed in claim 2, wherein: the cross section of the through groove is circular.

4. The prestressed concrete endless plate compression-resistant pipe pile tension connecting member as claimed in claim 3, wherein: the inner diameter of the through groove in the expansion shell is gradually reduced from one end to the other end.

5. The prestressed concrete endless plate compression-resistant pipe pile tension connecting member as claimed in claim 4, wherein: the expansion tank is in a shape like a Chinese character 'yi' or 'ten'.

6. The prestressed concrete endless plate compression-resistant pipe pile tension connecting member as claimed in claim 5, wherein: and a guide rib plate is arranged on the outer surface of the wedge piece and extends from the head part to the tail part.

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