CN203613537U - Special pile tip for post-grouting of PHC (pyrolysis hydrocarbon) tubular pile - Google Patents
Special pile tip for post-grouting of PHC (pyrolysis hydrocarbon) tubular pile Download PDFInfo
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- CN203613537U CN203613537U CN201320628879.5U CN201320628879U CN203613537U CN 203613537 U CN203613537 U CN 203613537U CN 201320628879 U CN201320628879 U CN 201320628879U CN 203613537 U CN203613537 U CN 203613537U
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Abstract
The utility model discloses a special pipe tip for post grouting of a PHC (pyrolysis hydrocarbon) tubular pile. The pile tip comprises a conical steel pile tip body, wherein an opening end of the conical steel pile tip body is provided with an annular soleplate, the upper surface of the annular soleplate is fixedly provided with an annular steel cylinder with the outer diameter being identical to that of an annular steel plate on the bottom of a PHC tubular pile body, the top end of the annular steel cylinder is connected with the lower surface of the annular steel plate on the bottom of the PHC tubular pile in a welding manner, the outer wall of the steel cylinder is uniformly provided with a plurality of radial through holes, and a closing mechanism for closing an inner hole of the annular steel plate is fixedly arranged in the conical steel pile tip. The special pipe tip has the advantages that the upper part of the conical steel pile tip is provided with the steel cylinder with the radial through holes, cement slurry is pressed outwards to a void area through the radial through holes on the side wall of the steel cylinder so as to fill a gap between the pile tip and a supporting layer, the peripheral area of the conical steel pile tip also can be filled by the cement slurry, so that on one hand, the contact between the PHC tubular pile body and the supporting layer can be guaranteed, on the other hand, the conical steel pile tip can be prevented from being corroded by underground water, and the service life can be prolonged.
Description
Technical field
The utility model relates to pile foundation construction servicing unit technical field, relates in particular to the special pile top of PHC pile tube grouting behind shaft or drift lining.
Background technology
It is fast that PHC pile tube has speed of application, intensity is high, the advantages such as cost is low, be widely used in coastal and interior regional industry and civilian construction, because adopting static pressure pile-sinking, the complexity of geological conditions is subject to many restrictions, have relatively high expectations and complex formation engineering in general employing sunk by hammer for bearing capacity of single pile, it is long that the every pile of sunk by hammer approximately needs hammering 800-2000 hammer just can reach the stake of designing requirement, hammering stress repeated action so repeatedly easily causes PHC pile tube body to produce many cracks, if slip casting is not in place, have under the geologic condition of medium or deep-etching, underground water can produce corrosion to pipe pile reinforcing bar and steel pile tip, weaken pile tube bearing capacity and affect durability, simultaneously, a large area clump of piles is squeezed in coastal saturated soft soil area can make pile foundation produce floating, cause stake end to come to nothing with bearing stratum, existing PHC pile tube lower end cannot fully be filled in slip casting process, and then reduce bearing capacity of single pile and produce differential settlement.
Summary of the invention
Cannot fully fill up in slip casting process for solving the crackle that existing PHC pile tube produces in hammering process, underground water easily corrodes the intrinsic reinforcing bar of PHC pile tube, affect single pile application life, because the problem that causes bearing capacity of single pile to decline cannot be filled in the space existing between stake end and bearing stratum in slip casting process, provide a kind of PHC pile tube grouting behind shaft or drift lining special pile top simultaneously.
The technical solution of the utility model is as follows: the special pile top of a kind of PHC pile tube grouting behind shaft or drift lining, described pile top comprises tapered steel pile top body, described tapered steel pile top body open end is provided with annular bottom plate, on annular bottom plate upper surface, be fixed with the annular steel cylinder that external diameter is identical with the doughnut-shaped steel plate external diameter of PHC pile tube body bottom, the doughnut-shaped steel plate soffit welding of described annular steel cylinder top and PHC pile tube bottom, on described steel cylinder outer wall, be evenly provided with radial direction through hole, in described tapered steel pile top, be fixed with the closing means for closed ring steel plate endoporus.
Described closing means comprises shrouding, guide rod, guide pin bushing and helical spring, described guide rod is fixed in tapered steel pile top and its axis overlaps with the axis of rotation of tapered steel pile top, described guide pin bushing lower end and guide rod upper end are slidably matched, described helical spring is set on guide pin bushing outer wall, described shrouding is fixed at guide pin bushing top, described helical spring upper end and the laminating of shrouding soffit, described helical spring lower end and the laminating of tapered steel pile top inwall.
The diameter of described shrouding equals steel cylinder internal diameter, and the through hole lower limb arranging on described steel cylinder outer wall is greater than shrouding thickness apart from the distance between annular bottom plate end face.
The utility model is compared with prior art provided with the steel cylinder of radial direction through hole on tapered steel pile top top, and closing means is set therein, in high-pressure slip-casting process, high pressure mortar backs down shrouding downwards, the radial direction through hole that mortar arranges from steel cylinder sidewall is outwards pressed out to the region of coming to nothing, fill the gap between pile top and bearing stratum, mortar can be filled tapered steel pile top peripheral region simultaneously, guarantee that PHC pile tube body contacts with bearing stratum on the one hand, prevent on the one hand in addition underground water corrosion tapered steel pile top, can increase the bearing capacity of single pile of PHC pile tube, can also extend PHC pile tube whole service life, in the time that around tapered steel pile top, mortar pressure is more than or equal to grouting pressure, the intrinsic mortar of PHC pile tube permeates in the crack forming on its sidewall, plug the gap, prevent Groundwater infiltration PHC pile tube body and corrode inner steel bar, increase the service life.
accompanying drawing explanation
Fig. 1 is the utility model structural representation
Fig. 2 is the high-pressure slip-casting apparatus structure schematic diagram using in slip casting process
Fig. 3 is the utility model high pressure pouring apparatus structure schematic diagram
Being labeled as in accompanying drawing: 1, Grouting Pipe; 2, bolt; 3, sleeve pipe; 4, PHC pile tube body; 5, pressing plate; 6, ball; 7, tapered steel pile top; 8, steel cylinder; 9, doughnut-shaped steel plate; 10, helical spring; 11, guide rod; 12, through hole; 13, shrouding; 15, guide pin bushing.
the specific embodiment
The following examples are to describe in further detail of the present utility model.
PHC pile tube is in work progress, the general sunk by hammer that adopts, in hammering process, on PHC pile tube body sidewall, may produce blind crack, although can not affect at short notice its bearing capacity of single pile, but just have and have a strong impact in the region with corrosivity underground water, the intrinsic reinforcing bar of underground water meeting directly etching PHC pile tube, affect its application life, after some region construction PHC pile tubes, can produce the situation of entirety floating simultaneously, between PHC pile tube and bearing stratum, there is certain gap, and the only slip casting therein in work progress of existing pile tube, cannot fill up the region between PHC pile tube bottom and bearing stratum at all, cause bearing capacity of single pile to decline, even there is the situation that foundation settlement is inhomogeneous, have a strong impact on building safety, for addressing this problem, the utility model provides the one special pile top of PHC pile tube grouting behind shaft or drift lining as depicted in figs. 1 and 2, described pile top comprises tapered steel pile top 7 bodies, described tapered steel pile top 7 body open end are provided with annular bottom plate, on annular bottom plate upper surface, be fixed with the annular steel cylinder 8 that external diameter is identical with doughnut-shaped steel plate 9 external diameters of PHC pile tube body 4 bottoms, the doughnut-shaped steel plate 9 soffit welding of described annular steel cylinder 8 tops and PHC pile tube bottom, on described steel cylinder 8 outer walls, be evenly provided with radial direction through hole 12, in described tapered steel pile top 7, be fixed with the closing means for closed ring steel plate 9 endoporus.Described closing means comprises shrouding 13, guide rod 11, guide pin bushing 15 and helical spring 10, described guide rod 11 is fixed in tapered steel pile top 7 and its axis overlaps with the axis of rotation of tapered steel pile top 7, described guide pin bushing 15 lower ends and guide rod 11 upper ends are slidably matched, described helical spring 10 is set on guide pin bushing 15 outer walls, described shrouding 13 is fixed at guide pin bushing 15 tops, described helical spring 10 upper ends and shrouding 13 soffit laminatings, described helical spring 10 lower ends and the 7 inwall laminatings of tapered steel pile top.The diameter of described shrouding 13 equals steel cylinder 8 internal diameters, and through hole 12 lower limbs that arrange on described steel cylinder 8 outer walls are greater than shrouding 13 thickness apart from the distance between annular bottom plate end face.
The utility model is applicable to PHC tube pile high-pressure mortar depositing construction, owing in tapered steel pile top, closing means being set, after pile sinking completes, first in PHC pile tube, installation high-voltage grouting device carries out high-pressure slip-casting, in the time that mortar pressure is greater than helical spring pressure, shrouding moves down, mortar enters steel cylinder, and the outside slip casting of through hole from steel cylinder sidewall, the mortar extruding from through hole is filled with between PHC pile tube body lower end and bearing stratum, fill the gap between tapered steel pile top and soil layer simultaneously, improve the load-carrying construction between PHC pile tube and bearing stratum, effectively improve bearing capacity of single pile, prevent that foundation settlement is inhomogeneous, the high pressure pouring device (as shown in Figure 3) that the utility model adopts comprises Grouting Pipe 1, sleeve pipe 3, nut 2, pressing plate 5 and ball 6, described Grouting Pipe lower end arranges at least two ball, described sleeve pipe suit and Grouting Pipe outside, cannula tip arranges the threaded engagement on nut and Grouting Pipe outer wall, sleeve pipe lower end arranges pressing plate 5 and compresses ball 6, in the time of needs slip casting, first promote sleeve pipe downwards by means of nut, pressing plate compresses ball downwards, ball axial compression, make its radial expansion, and fit in PHC pile tube inner body wall, then Grouting Pipe is connected with grouting equipment and carries out slip casting, in slip casting process, high pressure mortar infiltrates in the crackle on PHC pile tube body sidewall, crackle on filled sidewall, prevent Groundwater infiltration PHC pile tube body internal corrosion reinforcing bar, guarantee its application life.
The utility model is by being provided with the steel cylinder of radial direction through hole on tapered steel pile top top, and closing means is set therein, in high-pressure slip-casting process, high pressure mortar backs down shrouding downwards, the radial direction through hole that mortar arranges from steel cylinder sidewall is outwards pressed out to the region of coming to nothing, fill the gap between pile top and bearing stratum, mortar can be filled tapered steel pile top peripheral region simultaneously, guarantee that PHC pile tube body contacts with bearing stratum on the one hand, prevent on the one hand in addition underground water corrosion tapered steel pile top, can increase the bearing capacity of single pile of PHC pile tube, can also extend PHC pile tube whole service life, in the time that around tapered steel pile top, mortar pressure is more than or equal to grouting pressure, the intrinsic mortar of PHC pile tube permeates in the crack forming on its sidewall, plug the gap, prevent Groundwater infiltration PHC pile tube body and corrode inner steel bar, increase the service life.
Claims (3)
1. the special pile top of PHC pile tube grouting behind shaft or drift lining, it is characterized in that, described pile top comprises tapered steel pile top (7) body, described tapered steel pile top (7) body open end is provided with annular bottom plate, on annular bottom plate upper surface, be fixed with the annular steel cylinder (8) that external diameter is identical with doughnut-shaped steel plate (9) external diameter of PHC pile tube body (4) bottom, doughnut-shaped steel plate (9) the soffit welding of described annular steel cylinder (8) top and PHC pile tube bottom, on described steel cylinder (8) outer wall, be evenly provided with radial direction through hole (12), in described tapered steel pile top (7), be fixed with the closing means for closed ring steel plate (9) endoporus.
2. the special pile top of PHC pile tube grouting behind shaft or drift lining according to claim 1, it is characterized in that: described closing means comprises shrouding (13), guide rod (11), guide pin bushing (15) and helical spring (10), described guide rod (11) is fixed in tapered steel pile top (7), and its axis overlaps with the axis of rotation of tapered steel pile top (7), described guide pin bushing (15) lower end and guide rod (11) upper end are slidably matched, described helical spring (10) is set on guide pin bushing (15) outer wall, described shrouding (13) is fixed at guide pin bushing (15) top, described helical spring (10) upper end and the laminating of shrouding (13) soffit, described helical spring (10) lower end and the laminating of tapered steel pile top (7) inwall.
3. the special pile top of PHC pile tube grouting behind shaft or drift lining according to claim 2, it is characterized in that: the diameter of described shrouding (13) equals steel cylinder (8) internal diameter, through hole (12) lower limb arranging on described steel cylinder (8) outer wall is greater than shrouding (13) thickness apart from the distance between annular bottom plate end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320628879.5U CN203613537U (en) | 2013-10-12 | 2013-10-12 | Special pile tip for post-grouting of PHC (pyrolysis hydrocarbon) tubular pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320628879.5U CN203613537U (en) | 2013-10-12 | 2013-10-12 | Special pile tip for post-grouting of PHC (pyrolysis hydrocarbon) tubular pile |
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| Publication Number | Publication Date |
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| CN203613537U true CN203613537U (en) | 2014-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320628879.5U Expired - Fee Related CN203613537U (en) | 2013-10-12 | 2013-10-12 | Special pile tip for post-grouting of PHC (pyrolysis hydrocarbon) tubular pile |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196023A (en) * | 2014-09-10 | 2014-12-10 | 林基 | Precast concrete tubular pile tip with mechanical connection device and using method of precast concrete tubular pile tip |
| CN107254875A (en) * | 2017-07-10 | 2017-10-17 | 浙江大学 | Pile for prestressed pipe pile grouting constructing device and method |
| CN109112938A (en) * | 2018-10-18 | 2019-01-01 | 山东大学 | Roadbed interior laminate layer deforms real-time monitoring system and its installation method |
| CN109496244A (en) * | 2016-05-25 | 2019-03-19 | Gbm工程有限公司 | Foundation pile mounting device |
-
2013
- 2013-10-12 CN CN201320628879.5U patent/CN203613537U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196023A (en) * | 2014-09-10 | 2014-12-10 | 林基 | Precast concrete tubular pile tip with mechanical connection device and using method of precast concrete tubular pile tip |
| CN104196023B (en) * | 2014-09-10 | 2016-08-24 | 林基 | A kind of using method of the concrete precast pipe pile pile top of band mechanical connecting device |
| CN109496244A (en) * | 2016-05-25 | 2019-03-19 | Gbm工程有限公司 | Foundation pile mounting device |
| CN109496244B (en) * | 2016-05-25 | 2021-03-09 | Gbm工程有限公司 | Foundation pile installation device |
| CN107254875A (en) * | 2017-07-10 | 2017-10-17 | 浙江大学 | Pile for prestressed pipe pile grouting constructing device and method |
| CN109112938A (en) * | 2018-10-18 | 2019-01-01 | 山东大学 | Roadbed interior laminate layer deforms real-time monitoring system and its installation method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140528 Termination date: 20211012 |