CN103485339A - Static pressure expanded foot prestress high strength concrete pipe pile - Google Patents

Static pressure expanded foot prestress high strength concrete pipe pile Download PDF

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Publication number
CN103485339A
CN103485339A CN201310479989.4A CN201310479989A CN103485339A CN 103485339 A CN103485339 A CN 103485339A CN 201310479989 A CN201310479989 A CN 201310479989A CN 103485339 A CN103485339 A CN 103485339A
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China
Prior art keywords
steel plate
high strength
strength concrete
pile tube
prestressed high
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CN201310479989.4A
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CN103485339B (en
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张明义
白晓宇
闫楠
寇海磊
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Qingdao University of Technology
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Qingdao University of Technology
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Abstract

The invention belongs to the technical field of ground foundation engineering equipment and relates to a static pressure expanded foot prestress high strength concrete pipe pile. An open or closed expanded foot formed by a steel plate of a closed circular or open circular structure is welded at a pile end of a prestress high strength concrete pipe pile; diameter of the steel plate is larger than the diameter of the prestress high strength concrete pipe pile; a stiffening rib is welded outside the pile end of the prestress high strength concrete pipe pile corresponding to the steel plate; the stiffening rib is a trapezoidal steel plate with thickness the same as that of the steel plate, and geometric construction of the stiffening rib is not beyond the outer edge of the steel plate. The static pressure expanded foot prestress high strength concrete pipe pile is simple in structure, easy to operate, high in working efficiency, low in cost, high in bearing capacity, less in sedimentation and environment-friendly.

Description

A kind of static pressure enlarged footing prestressed high strength concrete pile tube
Technical field:
The invention belongs to the ground foundation engineering equipment technical field, relate to a kind of enlarged footing prestressed high strength concrete (PHC) pile tube that adopts static pressure construction, be applicable to soft lower hard earth formation, its bearing stratum buries more shallow and bearing capacity is higher, above covers the earth formation of soft layer.
Background technology:
Prestressed high strength concrete (PHC) pile tube bearing capacity is high, and speed of application is fast, and work efficiency is high, and the duration is short, steady quality, and the civilized construction that is easy to do, safety in production, be the effective measures of indirectly increasing economic efficiency; Static pressure construction is to make stress by the deadweight of pile press and the counterweight on pile frame the PHC pile tube is pressed into to a kind of process for sinking in soil, in pile driving process, pile driving pressure can be intuitively, read exactly and record, thus to pile capacity control and the judgement accuracy high; Pile quality and pile sinking length can be monitored by direct approach, the artificial disturbance factor is few, be difficult to practise fraud, static pressure method single pile bearing force rate hammering method is reliable, and static pressure construction is shockproof, noiselessness, be adapted at urban district and other are constructed to the conditional place of noise, at engineering circles, is used widely.Therefore, seek a kind of enlarged footing PHC pile tube of static pressure construction, make enlarged footing PHC pile tube have the advantage of expanded bore pile and common PHC pile tube concurrently on mechanics, bearing capacity is high, sedimentation and deformation is little, can reduce a long or stake footpath under identical condition, reduce to a great extent construction costs, especially in " upper soft lower hard " stratum, the stake end is supported in than the hard rock soil layer, given full play to the bearing capacity of stake end rock-soil layer, bearing capacity of pile tip is significantly improved, had broad application prospects and good economic benefit.
Summary of the invention:
The object of the invention is to overcome the shortcoming that prior art exists, seek design a kind of enlarged footing PHC pile tube that adopts static pressure construction is provided, the steel plate that utilization is welded in the stake end forms an enlarged footing, increase the effective Area of bearing of stake end, and set up stiffening rib in steel plate and the junction of stake end, improve the bearing strength of enlarged footing, thereby raising bearing capacity of pile tip, become with the stake end and be supported for the master, pile side friction is that auxiliary end holds the type friction pile (the PHC pile tube is pressed into after the 1m degree of depth and squeezes in advance the soft soil of opening and draw close to pile body under Gravitative Loads, pile side friction starts to play a role, but proportion is less, be about 10% left and right), improve bearing capacity, reduce sedimentation, under the same terms, can reduce a footpath or the stake long, reduce construction costs.
To achieve these goals, agent structure of the present invention comprises prestressed high strength concrete (PHC) pile tube, steel plate and stiffening rib; The stake end welded type of prestressed high strength concrete pile tube is shaped with the steel plate formation of remain silent circle or open circles ring structure and remains silent or the opening enlarged footing, increases the effective Area of bearing of stake end; The diameter of steel plate is greater than the diameter of prestressed high strength concrete pile tube; The stake end outside corresponding steel plate place welding of prestressed high strength concrete pile tube is shaped with stiffening rib, for improving the bearing strength of enlarged footing, thus the bearing capacity of pile tip of raising prestressed high strength concrete pile tube; Stiffening rib is the trapezoidal steel plate identical with steel plate thickness, and the geometry of stiffening rib does not exceed the outward flange of steel plate.
Concrete preparation process of the present invention is:
(1), diameter and the form of the first determination of characteristic value of bearing capacity steel plate according to prestressed high strength concrete pile tube single pile; The diameter of steel plate is greater than the diameter of prestressed high strength concrete pile tube; The form of structure of steel plate is circle or the open circles ring structure of remaining silent;
(2), by the steel plate of steel plate and prestressed high strength concrete pipe pile end, the mode by welding closely is joined together to form enlarged footing again, guarantees that the cross section centre of form of prestressed high strength concrete pile tube overlaps with the cross section centre of form of steel plate;
(3), then by the stiffening rib of trapezoidal steel plate structure respectively with the steel ring welding in steel plate and the prestressed high strength concrete pipe pile end outside, stiffening rib is evenly distributed on steel plate, the quantity of stiffening rib is by partial pressing's strength control of steel plate;
(4), after the enlarged footing of prestressed high strength concrete pile tube installs, according to static-pressure construction method, constructed, static-pressure construction method is identical with the static pressure construction of common prestressed high strength concrete pile tube pile tube.
Compared with prior art, it is simple in structure in the present invention, easy to operate, high efficiency, and cost is low, and bearing capacity is high, and sedimentation is little, environmental friendliness.
The accompanying drawing explanation:
Fig. 1 is the enlarged footing PHC pile tube agent structure principle schematic of remaining silent the present invention relates to.
Fig. 2 is the opening enlarged footing PHC pile tube agent structure principle schematic the present invention relates to.
Fig. 3 is the enlarged footing PHC pile tube plan structure principle schematic the present invention relates to.
The specific embodiment:
Below by embodiment, also be described further by reference to the accompanying drawings.
Embodiment:
The agent structure of the present embodiment comprises prestressed high strength concrete (PHC) pile tube 1, steel plate 2 and stiffening rib 3; The stake end welded type of prestressed high strength concrete pile tube 1 is shaped with steel plate 2 formation of remain silent circle or open circles ring structure and remains silent or the opening enlarged footing, increases the effective Area of bearing of stake end; The diameter of steel plate 2 is greater than the diameter of prestressed high strength concrete pile tube 1; The corresponding steel plate 2 places welding in the stake end outside of prestressed high strength concrete pile tube 1 is shaped with stiffening rib 3, for improving the bearing strength of enlarged footing, thus the bearing capacity of pile tip of raising prestressed high strength concrete pile tube 1; Stiffening rib 3 is the trapezoidal steel plate identical with steel plate 2 thickness, and the geometry of stiffening rib 3 does not exceed the outward flange of steel plate 2.
The concrete preparation process of the present embodiment is:
(2), diameter and the form of the first determination of characteristic value of bearing capacity steel plate 2 according to prestressed high strength concrete pile tube 1 single pile; The diameter of steel plate 2 is greater than the diameter of prestressed high strength concrete pile tube 1; The form of structure of steel plate 2 is circle or the open circles ring structure of remaining silent;
(2), by the steel plate of steel plate 2 and 1 end of prestressed high strength concrete pile tube, the mode by welding closely is joined together to form enlarged footing again, guarantees that the cross section centre of form of prestressed high strength concrete pile tube 1 overlaps with the cross section centre of form of steel plate 2;
(3), then by the stiffening rib of trapezoidal steel plate structure 3 respectively with the steel ring welding in 1 end outside of steel plate 2 and prestressed high strength concrete pile tube, stiffening rib 3 is evenly distributed on steel plate 2, the quantity of stiffening rib 3 is by partial pressing's strength control of steel plate 2;
(4), after the enlarged footing of prestressed high strength concrete pile tube 1 installs, according to static-pressure construction method, constructed, static-pressure construction method is identical with the static pressure construction of common prestressed high strength concrete pile tube pile tube.

Claims (2)

1. a static pressure enlarged footing prestressed high strength concrete pile tube, is characterized in that agent structure comprises prestressed high strength concrete pile tube, steel plate and stiffening rib; The stake end welded type of prestressed high strength concrete pile tube is shaped with the steel plate formation of remain silent circle or open circles ring structure and remains silent or the opening enlarged footing, increases the effective Area of bearing of stake end; The diameter of steel plate is greater than the diameter of prestressed high strength concrete pile tube; The stake end outside corresponding steel plate place welding of prestressed high strength concrete pile tube is shaped with stiffening rib, for improving the bearing strength of enlarged footing, thus the bearing capacity of pile tip of raising prestressed high strength concrete pile tube; Stiffening rib is the trapezoidal steel plate identical with steel plate thickness, and the geometry of stiffening rib does not exceed the outward flange of steel plate.
2. static pressure enlarged footing prestressed high strength concrete pile tube according to claim 1 is characterized in that concrete preparation process is:
(1), diameter and the form of the first determination of characteristic value of bearing capacity steel plate according to prestressed high strength concrete pile tube single pile; The diameter of steel plate is greater than the diameter of prestressed high strength concrete pile tube; The form of structure of steel plate is circle or the open circles ring structure of remaining silent;
(2), by the steel plate of steel plate and prestressed high strength concrete pipe pile end, the mode by welding closely is joined together to form enlarged footing again, guarantees that the cross section centre of form of prestressed high strength concrete pile tube overlaps with the cross section centre of form of steel plate;
(3), then by the stiffening rib of trapezoidal steel plate structure respectively with the steel ring welding in steel plate and the prestressed high strength concrete pipe pile end outside, stiffening rib is evenly distributed on steel plate, the quantity of stiffening rib is by partial pressing's strength control of steel plate;
(4), after the enlarged footing of prestressed high strength concrete pile tube installs, according to static-pressure construction method, constructed, static-pressure construction method is identical with the static pressure construction of common prestressed high strength concrete pile tube pile tube.
CN201310479989.4A 2013-10-15 2013-10-15 Static pressure expanded foot prestress high strength concrete pipe pile Active CN103485339B (en)

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CN103485339B CN103485339B (en) 2017-01-11

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108385676A (en) * 2018-03-16 2018-08-10 河海大学 Precast concrete triangle compacted bearing disk pile
CN113062308A (en) * 2021-03-26 2021-07-02 青岛地质工程勘察院(青岛地质勘查开发局) Method for improving single pile bearing capacity of open prestress high-strength concrete pipe pile
CN113062307A (en) * 2021-03-26 2021-07-02 青岛地质工程勘察院(青岛地质勘查开发局) Device for improving bearing capacity of single open prestressed high-strength concrete pipe pile

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2218722A (en) * 1988-05-19 1989-11-22 Basil Green Pile pressing
CN1441124A (en) * 2003-04-18 2003-09-10 雷玉华 High-pressure rotary spraying and core inserting process to form pedestal pile
CN101255694A (en) * 2008-04-14 2008-09-03 河南国基建设集团有限公司 High-strength prestressed concrete pipe pile construction method
KR20110000170A (en) * 2009-06-26 2011-01-03 주식회사 스마텍엔지니어링 Composit pile combined steel tubular pile and concrete pile reinforced with connecting structure
CN103475423A (en) * 2013-09-06 2013-12-25 成都网动光电子技术股份有限公司 Optical module transmission circuit transmitting HDTV signals
CN203475423U (en) * 2013-10-15 2014-03-12 青岛理工大学 Static pressure expanding head prestress high strength concrete pipe column

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2218722A (en) * 1988-05-19 1989-11-22 Basil Green Pile pressing
CN1441124A (en) * 2003-04-18 2003-09-10 雷玉华 High-pressure rotary spraying and core inserting process to form pedestal pile
CN101255694A (en) * 2008-04-14 2008-09-03 河南国基建设集团有限公司 High-strength prestressed concrete pipe pile construction method
KR20110000170A (en) * 2009-06-26 2011-01-03 주식회사 스마텍엔지니어링 Composit pile combined steel tubular pile and concrete pile reinforced with connecting structure
CN103475423A (en) * 2013-09-06 2013-12-25 成都网动光电子技术股份有限公司 Optical module transmission circuit transmitting HDTV signals
CN203475423U (en) * 2013-10-15 2014-03-12 青岛理工大学 Static pressure expanding head prestress high strength concrete pipe column

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
黄敏: "带翼板预应力管桩承载性能的研究", 《浙江大学博士后研究工作报告》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108385676A (en) * 2018-03-16 2018-08-10 河海大学 Precast concrete triangle compacted bearing disk pile
CN108385676B (en) * 2018-03-16 2020-09-18 河海大学 Precast concrete triangular squeezing and expanding support disc pile and construction method thereof
CN113062308A (en) * 2021-03-26 2021-07-02 青岛地质工程勘察院(青岛地质勘查开发局) Method for improving single pile bearing capacity of open prestress high-strength concrete pipe pile
CN113062307A (en) * 2021-03-26 2021-07-02 青岛地质工程勘察院(青岛地质勘查开发局) Device for improving bearing capacity of single open prestressed high-strength concrete pipe pile

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