CN213926243U - Assembled pile cap for prestressed pipe pile - Google Patents
Assembled pile cap for prestressed pipe pile Download PDFInfo
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- CN213926243U CN213926243U CN202022318520.0U CN202022318520U CN213926243U CN 213926243 U CN213926243 U CN 213926243U CN 202022318520 U CN202022318520 U CN 202022318520U CN 213926243 U CN213926243 U CN 213926243U
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Abstract
The utility model relates to a construction technical field, in particular to assembled pile cap for prestressed pipe pile, including roof, shear leg and well core leg are all located the roof bottom, anti shear leg is thick wall tubular structure, well core leg is cylindric structure, well core leg is located anti shear leg is interior. The utility model effectively enhances the shearing resistance of the upper part of the prestressed pipe pile by arranging the shearing resistance legs and the central core leg structure; the top plate structure is arranged, so that the stress area of the pile top is enlarged, and the punching force of the prestressed pipe pile acting on the bottom of the upper foundation can be obviously reduced. Compare with the scheme that carries out the reinforcement of slab muscle behind the on-the-spot installation pile cap among the prior art, the utility model discloses can be prefabricated before the construction, on-the-spot direct hoist and mount slip casting can, have the characteristics that the device is simple reliable, bearing capacity is strong, the construction is swift.
Description
Technical Field
The utility model relates to a construction technical field, in particular to assembled pile cap for prestressed pipe pile.
Background
Along with the development of expressways in China, the requirements on the construction period and the soft soil roadbed treatment effect are higher and higher, the composite foundation is used more and more as a soft soil foundation with short construction period and good effect, and particularly, the rigid pile composite foundation technology has the advantages of high pile body concrete strength, strong penetration capability and high single pile bearing capacity, can effectively reduce the foundation settlement, and is increasingly widely applied to the treatment of deep soft soil foundations. The prestressed pipe pile is used as one kind of rigid pile, has high concrete strength in the pile body and high bearing capacity in single pile, and may be driven into dense sand layer and strong weathered layer. And because the pile sections of the prestressed pipe pile are different in length, flexible in collocation and convenient in section length, the length of the section pile can be adjusted at any time according to the change of geological conditions in a construction site, the geological condition adaptability is strong, and the pile using amount is saved. Therefore, the method has the characteristics of high construction speed, high efficiency and short construction period.
However, due to the complex characteristic of embankment load, the pipe pile is required to have higher compressive and tensile strength and higher shear resistance. In order to improve the bearing capacity of a single pile and adapt to the complex stress environment of a pile body, a prestressed pipe pile with a pile cap is commonly adopted at present. The pile cap can generate two phenomena of stress concentration and stress diffusion, the rigid plate function is exerted, the soil body under the pile cap is not separated from the pile cap, the pile body and the soil body under the pile cap can generate equivalent vertical deformation, the composite bearing capacity of a single pile is increased, and meanwhile, the pile cap has better sinking control capacity; the cross-sectional area of the pile cap is far greater than that of the pile body, so that the contact area between the pile top and the gravel cushion layer is increased, the pile top concentrated force is homogenized, the penetration amount of the pile top to the cushion layer is reduced, and the overall effect of the gravel cushion layer is ensured. For example, patent application No. CN201320475513.9 (published as 2014, 4 and 2) discloses a reinforced connection structure between a pile and a pile cap, which improves the bearing capacity of a pipe pile to a certain extent by welding reinforcing rib plates between the pile cap and the pipe pile, but the structure is complicated in construction and is not suitable for the requirement of rapid development of the current building industry.
In summary, the existing prestressed pipe pile caps have the problems of insufficient composite bearing capacity, complex construction, time and labor consumption and the like, and therefore, the inventors of the present invention have conducted intensive research on the above problems and have developed the present invention.
SUMMERY OF THE UTILITY MODEL
For the above-mentioned bearing capacity that solves the pile cap among the prior art existence is not enough, the inconvenient scheduling problem of construction, the utility model provides an assembled pile cap for prestressed pipe pile, including roof, shear leg and well core leg are all located the roof bottom, it is thick wall tubular structure to resist shear leg, well core leg is cylindric structure, well core leg is located in the anti-shear leg.
As a preferable mode of the present invention, the height of the shear resistant leg is one third to one half of the height of the center leg.
As a preferred mode of the present invention, the inner diameter of the shear resistant leg is larger than the outer diameter of the central core leg by 100-400 mm.
As an optimized mode of the utility model, the diameter of the central core leg is compared with the internal diameter of the prestressed pipe pile is 20-100mm less, the bottom of the central core leg is sleeved with a rubber ring, the external diameter of the rubber ring is matched with the internal diameter of the prestressed pipe pile.
As a preferred mode of the utility model, be equipped with slip casting pipe and blast pipe in the roof with the well core leg, the slip casting pipe is followed the roof top extends to the distance well core leg bottom 100 and 200mm departments, the blast pipe is followed the roof top extends to apart from well core leg top 50-200mm departments.
As a preferred mode of the utility model, slip casting pipe and blast pipe bottom are equipped with the side opening respectively, the slip casting pipe with the blast pipe passes through respectively the side opening with the well core leg outside is linked together.
As a preferred mode of the utility model, the distance between the grouting pipe and the exhaust pipe is 10-30mm from the outer wall of the central core leg.
The utility model provides an assembled pile cap for prestressed pipe pile, which effectively enhances the shearing resistance of the upper part of the prestressed pipe pile by arranging the shearing resistance legs and the central core leg structure; the top plate structure is arranged, so that the stress area of the pile top is enlarged, and the punching force of the prestressed pipe pile acting on the bottom of the upper foundation can be obviously reduced. Compare with the scheme that carries out the reinforcement of slab muscle behind the on-the-spot installation pile cap among the prior art, the utility model discloses can be prefabricated before the construction, on-the-spot direct hoist and mount slip casting can, have the characteristics that the device is simple reliable, bearing capacity is strong, the construction is swift.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a sectional view of the assembled pile cap and the tubular pile for the prestressed tubular pile provided by the present invention;
fig. 2 is a sectional view of the assembled pile cap for prestressed pipe piles provided by the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 1 in accordance with the present invention;
fig. 5 is a cross-sectional view taken along line C-C of fig. 1 in accordance with the present invention;
fig. 6 is a cross-sectional view taken along line D-D of fig. 1 in accordance with the present invention;
fig. 7 is a cross-sectional view taken along line E-E of fig. 1 in accordance with the present invention;
fig. 8 is a sectional view taken along line F-F of fig. 1 according to the present invention.
Reference numerals:
110 top plate 120 shear leg 130 center leg
140 rubber ring 150 grouting pipe 160 exhaust pipe
170 side hole 200 prestressed pipe pile 210 pile cavity
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The utility model provides an assembled pile cap for prestressed pipe pile, including roof 110, anti-leg 120 and well core leg 130 of cutting all locate roof 110 bottom, anti-leg 120 of cutting is thick wall tubular structure, well core leg 130 is cylindric structure, well core leg 130 is located anti-leg 120 of cutting.
In specific implementation, referring to fig. 1 to 7, the assembled pile cap for prestressed pipe piles provided by the present invention includes, but is not limited to, a top plate 110, shear legs 120 and a central leg 130 which are integrally cast with concrete, in this embodiment, the top plate is a square high-strength thick plate structure for enlarging the stressed area of the pile top to reduce the punching force of the prestressed pipe pile acting on the bottom of the upper foundation, preferably, the top plate can be cast into a shape of a circle, a triangle, etc. according to actual conditions; the shear resistant leg 120 and the center core leg 130 are both disposed at the bottom of the top plate 110, the shear resistant leg 120 is a thick-walled tubular structure, the center core leg 130 is a cylindrical structure, and the center core leg 130 is disposed inside the tubular structure of the shear resistant leg 130 and is coaxial with the tube.
In actual use, as shown in fig. 1 and fig. 4 to 8, the prestressed pipe pile 200 is a thick-wall tubular structure, the hollow part inside the prestressed pipe pile is the pile cavity 210, the central core leg 130 is located in the pile cavity 210, the shear-resistant leg 120 is sleeved outside the prestressed pipe pile 200, and the shear-resistant capability of the top end of the pipe pile structure is significantly enhanced through the combined action of the central core leg 130 and the shear-resistant leg 120.
Specifically, as shown in fig. 1, the height of the shear-resistant leg 120 is one third to one half of the height of the central leg 130, the shear-resistant leg 120 mainly resists the shearing force of the environment to the top of the pipe pile, and the central leg 130 also has the shearing resistance capability of enhancing the top of the prestressed pipe pile 200, so as to effectively prevent the top of the prestressed pipe pile 200 from being fractured due to shearing, therefore, the central leg 130 should have a sufficient length, and the shearing-resistant leg 120 may be relatively shorter than the central leg 130.
Specifically, as shown in fig. 2 and fig. 4-5, the inner diameter of the shear-resistant leg 120 is larger than the outer diameter of the central core leg 130 by 100mm and 400mm, the central core leg 130 of the pile cap provided in this embodiment needs to be inserted into the pile cavity 210, and the shear-resistant leg 120 needs to be sleeved outside the pre-stressed tubular pile 200, so that an annular space matched with the wall thickness of the commonly used pre-stressed tubular pile 200 is left between the central core leg 130 and the shear-resistant leg 120, which is convenient for construction and assembly, and at the same time, the structure is stable and is not easy to loosen.
Preferably, as shown in fig. 1, the diameter of the central core leg 130 is 20-100mm smaller than the inner diameter of the prestressed pipe pile 200, a rubber ring 140 is sleeved at the bottom of the central core leg 130, and the outer diameter of the rubber ring 140 is matched with the inner diameter of the prestressed pipe pile 200; well core leg 130 is longer, and its diameter slightly is less than the internal diameter of prestressed pipe pile 200 is favorable to making things convenient for the site operation assembly, and in the two clearance slip casting fill with additional strengthening, the rubber circle 140 of bottom plays the effect of stabilizing well core leg 130 bottom and interception injection thick liquid.
Preferably, the inner diameter of the shear-resistant leg 120 is slightly larger than the outer diameter of the prestressed pipe pile 200, which is beneficial to construction and assembly.
Preferably, a grouting pipe 150 and an exhaust pipe 160 are arranged in the top plate 110 and the central core leg 130, the grouting pipe 150 extends from the top of the top plate 110 to a position 100-200mm away from the bottom of the central core leg 130, and the exhaust pipe 160 extends from the top of the plate top 110 to a position 50-200mm away from the top of the central core leg 130; the bottom ends of the grouting pipe 150 and the exhaust pipe 160 are respectively provided with a side hole 170, and the grouting pipe 150 and the exhaust pipe 160 are respectively communicated with the outside of the central leg 130 through the side holes 170. After the completion hoist and mount, through pre-buried slip casting pipe 150 to prestressed pipe pile 200 with carry out the slip casting in the clearance of well core leg 130, fill the installation clearance, realize rapid Assembly ization construction, the gas in the clearance is followed side opening 170 and blast pipe 160 are discharged, avoid causing the inside high pressure of structure.
Preferably, the distance between the grouting pipe 150 and the exhaust pipe 160 is 10-30mm from the outer wall of the central leg 130, so as to avoid the blockage caused by the overlong side hole 170.
During actual use, the pile cap can be prefabricated in advance in engineering, after the construction of the prestressed pipe pile is finished, the assembled pile cap is directly hoisted and sleeved on the top of the prestressed pipe pile through hoisting equipment, the middle core leg 130 needs to be inserted into the pile cavity 210, the shearing resisting leg 120 is sleeved outside the prestressed pipe pile 200, grouting is performed into the prestressed pipe pile through the pre-embedded grouting pipe 150, and the installation gap is filled, so that rapid assembly construction is realized.
The utility model provides an assembled pile cap for prestressed pipe pile, which effectively enhances the shearing resistance of the upper part of the prestressed pipe pile by arranging the shearing resistance legs and the central core leg structure; the top plate structure is arranged, so that the stress area of the pile top is enlarged, and the punching force of the prestressed pipe pile acting on the bottom of the upper foundation can be obviously reduced. Compare with the scheme that carries out the reinforcement of slab muscle behind the on-the-spot installation pile cap among the prior art, the utility model discloses can be prefabricated before the construction, on-the-spot direct hoist and mount slip casting can, have the characteristics that the device is simple reliable, bearing capacity is strong, the construction is swift.
Although terms such as top plate, shear legs, core legs, rubber rings, grout tubes, air bleed tubes, side holes, pre-stressed pipe piles and pile cavities are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (7)
1. A assembled pile cap for stress tube stake in advance, its characterized in that: including roof plate (110), anti-shear leg (120) and well core leg (130) are all located roof plate (110) bottom, anti-shear leg (120) are thick wall tubular structure, well core leg (130) are cylindric structure, well core leg (130) are located in anti-shear leg (120).
2. The fabricated pile cap for prestressed pipe piles according to claim 1, wherein: the height of the shear legs (120) is one third to one half of the height of the core legs (130).
3. The fabricated pile cap for prestressed pipe piles according to claim 1, wherein: the inner diameter of the shear-resistant leg (120) is 100mm and 400mm larger than the outer diameter of the central core leg (130).
4. The fabricated pile cap for prestressed pipe piles according to claim 1, wherein: the diameter of well core leg (130) is compared in the internal diameter of prestressing force tubular pile (200) and is little 20-100mm, well core leg (130) bottom cover is equipped with rubber circle (140), the external diameter of rubber circle (140) with the internal diameter phase-match of prestressing force tubular pile (200).
5. The fabricated pile cap for prestressed pipe piles according to claim 1, wherein: and grouting pipes (150) and exhaust pipes (160) are arranged in the top plate (110) and the central core leg (130), the grouting pipes (150) extend from the top of the top plate (110) to positions 100-200mm away from the bottom of the central core leg (130), and the exhaust pipes (160) extend from the top of the top plate (110) to positions 50-200mm away from the top of the central core leg (130).
6. The fabricated pile cap for prestressed pipe piles according to claim 5, wherein: the bottom ends of the grouting pipe (150) and the exhaust pipe (160) are respectively provided with a side hole (170), and the grouting pipe (150) and the exhaust pipe (160) are respectively communicated with the outside of the central core leg (130) through the side holes (170).
7. The fabricated pile cap for prestressed pipe piles according to claim 5, wherein: the distance between the grouting pipe (150) and the exhaust pipe (160) is 10-30mm from the outer wall of the central core leg (130).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022318520.0U CN213926243U (en) | 2020-10-16 | 2020-10-16 | Assembled pile cap for prestressed pipe pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022318520.0U CN213926243U (en) | 2020-10-16 | 2020-10-16 | Assembled pile cap for prestressed pipe pile |
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| CN213926243U true CN213926243U (en) | 2021-08-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115450211A (en) * | 2022-08-29 | 2022-12-09 | 中亿丰建设集团股份有限公司 | Method for assembling construction of prestressed pipe pile cap steel bars |
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2020
- 2020-10-16 CN CN202022318520.0U patent/CN213926243U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115450211A (en) * | 2022-08-29 | 2022-12-09 | 中亿丰建设集团股份有限公司 | Method for assembling construction of prestressed pipe pile cap steel bars |
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