CN102561321A - Pile with concave-convex square prefabricated concrete segments - Google Patents
Pile with concave-convex square prefabricated concrete segments Download PDFInfo
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- CN102561321A CN102561321A CN2012100389311A CN201210038931A CN102561321A CN 102561321 A CN102561321 A CN 102561321A CN 2012100389311 A CN2012100389311 A CN 2012100389311A CN 201210038931 A CN201210038931 A CN 201210038931A CN 102561321 A CN102561321 A CN 102561321A
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Abstract
The invention discloses a pile with concave-convex square prefabricated concrete segments, which comprises a plurality of pile foundation segments. The pile foundation segments are fixedly connected with one another in sequence. Each pile foundation segment is in a hollow structure with a through inner cavity, a soil taking passage and a guide structure are disposed in the inner cavity of each pile foundation segment, each inner cavity serves as the oil taking passage, each guide structure comprises a support arm and a guide hole penetrating through a guide bar, the lateral wall of each pile foundation segment is further provided with a plurality of through holes for injection of air or water, and the cross section of each pile foundation segment is concave-convex and square. The pile with the concave-convex square prefabricated concrete segments in the structural design has the advantages high unit pile bearing capacity and the like.
Description
Technical field
The present invention relates to the technical field of building of soft foundation bridge, relate in particular to the stake of a kind of concavo-convex square precast concrete sections.
Background technology
The pile foundation of soft foundation bridge adopts isodiametric preformed pile or bored pile form usually at present, and section form generally adopts square or tubular.
Receive restrictions such as construction equipment and geological conditions, the size all less (diameter is below 600 millimeters) of general concrete precast pile.General hammering or the pile vibrosinking technology of adopting, the subject matter of its existence is:
1) diameter of concrete precast pile is less, and bearing capacity of single pile is lower, and therefore the radical of required stake is more.But when the radical of stake more for a long time, stake side soil is squeezed when piling, the stake that causes easily having constructed produces lateral displacement or displacement, the influence construction.
2) pile vibrosinking technology is subject to the limitation of construction equipment, generally is only applicable to the pile foundation of small building.The area of section of stake is smaller, and length is also lacked (general below 30 meters), the supporting capacity requirement that does not reach bridge pile foundation.
3) improve constantly along with what urban environmental protection required, the construction of driven piles such as hammering is adopted owing to negative effects such as noise, vibration have been inappropriate in the city.
On the other hand, the size of bored pile is big (diameter is more than 600 millimeters) generally, yet adopts the construction technology of boring and cast in situs underwater concrete can bring following problem again:
1) need poured in place concrete, speed of application is slow, and the construction period of a general pile needs 2～3 days, and construction quality can't effectively be controlled.
The mud that produces when 2) there is construction in construction process for bored pile can not meet environmental requirement to problems such as environment pollute.
3) when the soft foundation environment is constructed, the careless slightly pile holes protecting wall hole of collapsing easily causes the accident.
4) the concrete intensity of underwater casting is generally not high, can only reach C30 basically.
In sum, there is not good solution at present by large diameter bridge pile foundation on soft foundation, how realizing.
Therefore, those skilled in the art is devoted to develop the high concavo-convex square precast concrete sections stake of a kind of bearing capacity of single pile.
Summary of the invention
Because the above-mentioned defective of prior art, technical problem to be solved by this invention provides the high concavo-convex square precast concrete sections stake of a kind of bearing capacity of single pile.
For realizing above-mentioned purpose, the invention provides the stake of a kind of concavo-convex square precast concrete sections, comprise a plurality of pile foundation sections, be fixedly connected sequentially between each said pile foundation sections; Said pile foundation sections is the hollow structure that inner chamber connects; In the inner chamber of said pile foundation sections, be provided with fetch earth passage and guide frame, said inner chamber is double does the said passage that fetches earth; Said guide frame comprises support arm and is used to wear the pilot hole of guide peg, also offers a plurality of through holes jet or water spray that are used on the sidewall of said pile foundation sections, and the cross section of said pile foundation sections is concavo-convex square.
Preferably, the front end face of said pile foundation sections also is provided with the steel work shoe.
Preferably, said support arm is a steel construction piece, is fixedly connected with said pile foundation sections.
Preferably, said pile foundation sections is respectively arranged with said guide frame in the position near front end and rear end.
Preferably, the fixed connection between each said pile foundation sections is that prestressing force connects.
Beneficial effect of the present invention:
Concavo-convex square precast concrete sections of the present invention stake is because above-mentioned cancavo-convex structure design has increased contact area.Especially, the whole upper square structure of cross section is compared with cross section circular (like gear shape); Under the situation of same outer diameter as, the concavo-convex square contact area that increased greatly, the bearing capacity of single pile of vertical single pile bearing force rate equal diameter pile foundation improves 20%～50%; The horizontal anti-shearing force of pile foundation is significantly improved, and the total settlement of stake reduces greatly, has realized prefabricated, the low noise construction of soft foundation pile foundation construction; Significantly reduced the pile foundation radical, avoided interference stake week soil.The present invention has solved also simultaneously that the preformed pile diameter is little on the soft foundation, the not enough radical of bearing capacity of single pile remedies with bored pile construction speed is slow, construction quality can't effectively be controlled, produce problem such as environment pollution when constructing.
The concavo-convex square precast concrete sections stake that the present invention proposes, can satisfy reach about 3 meters at diameter on the soft foundation, length reaches 50～60 meters pile foundation requirement.
Owing to adopted said structure design, concavo-convex square precast concrete sections of the present invention stake can realize that the batch production beyond the job site is prefabricated, and in its construction, had following advantage:
1) adopt pile foundation prefabricate, on-the-spot mode of splicing, quickening speed of application, pile foundation quality guarantee easily.
2) adopt pile vibrosinking, realize low noise.
3) adopt the major diameter preformed pile, higher bearing capacity of pile foundation is provided.
4) take in the sinking process to fetch earth in the stake, the auxiliary mode of sinking of gas (water) curtain, reduce resistance, reduced the power requirement of equipment.
5) adopt guiding technique, realize accurate pile sinking.
6) guide peg is recyclable, recycle, low-carbon environment-friendly.
Below will combine accompanying drawing that the technique effect of design of the present invention, concrete structure and generation is described further, to understand the object of the invention, characteristic and effect fully.
Description of drawings
Fig. 1 is the plan structure sketch map of concavo-convex square precast concrete sections of the present invention stake one specific embodiment king-pile base pitch section.
Fig. 2 is an A-A portion sectional structure sketch map among Fig. 1.
Fig. 3 is the broken section structural representation of first section pile foundation sections in concavo-convex square precast concrete sections of the present invention stake one specific embodiment.
Fig. 4 is the construction view of concavo-convex square precast concrete sections of the present invention stake in construction.
Fig. 5 is the construction view of concavo-convex square precast concrete sections of the present invention stake in construction.
Fig. 6 is the construction view of concavo-convex square precast concrete sections of the present invention stake in construction.
Fig. 7 is the construction view of concavo-convex square precast concrete sections of the present invention stake in construction.
Fig. 8 is the construction view of concavo-convex square precast concrete sections of the present invention stake in construction.
The specific embodiment
Concavo-convex square precast concrete sections of the present invention stake comprises a plurality of pile foundation sections, and being fixedly connected sequentially between each pile foundation sections is integrally formed.
In each pile foundation sections, except first section pile foundation sections, the form of structure of other pile foundation sections at different levels is all identical, the prefabricated and reduction die cost with the scale of being more convenient for.The wherein structure of a pile foundation sections below is detailed.
Like Fig. 1, shown in Figure 2, a pile foundation sections 1 is surrounded by sidewall 10 and forms inner chamber 2, and inner chamber 2 connects wherein, and the double passage that fetches earth of doing, and also is provided with guide frame in the inner chamber 2.
Among the present invention, the true topic of the cross section of pile foundation sections is upper square, and outer wall has concavo-convex, be specially on sidewall 10, have a plurality of concavo-convex square 15, to increase contact area.
Particularly, the guide frame in the present embodiment comprises three support arms 11 that are uniformly distributed with in a circumferential direction, and is used to wear the pilot hole 12 of guide peg.Support arm 11 is a steel construction piece, with sidewall 10 fixed connections (or being cast in) of pile foundation sections 1.Guide peg is not the part of pile foundation sections 1, its structure and function, and back literary composition is stated in addition.
On the sidewall 10 of pile foundation sections 1, be reserved with vertical pipeline and a plurality of through hole 13 (technical term is " gas tabernacle ") that is used for jet or water spray, apply the gas or the water of high pressure with the aperture of pile lining from ground.
Be illustrated in figure 3 as the structural representation of first section pile foundation sections in the pile foundation sections of the present invention.The structure of the structure of first section pile foundation sections and pile foundation sections at different levels is basic identical; Institute's difference is, for ease of getting into the soil body, reduces the frictional resistance with the soil body; Front end face at first section pile foundation sections also is provided with inclined-plane 14, and the shoe that constitutes steel work is to decompose the frictional resistance of vertical direction.
The set-up mode on inclined-plane 14 can be the shape that extends out at inwall as shown in Figure 3, also can be not do illustrated trapezoidal at outer wall.
In addition, with reference to shown in Figure 3, in various embodiment, the pile foundation sections can be provided with aforesaid guide frame respectively in the position near front end and rear end, to obtain better guide effect.
In other embodiments, the form of guide frame also is not limited to above embodiment.For example, the quantity of support arm 11 also can be 2 or 4 or a plurality of (but the support arm of excessive number can influence the unimpeded of the passage that fetches earth), and the setting of guide frame also can be arranged on the middle part of pile foundation sections 1, and the quantity of pilot hole 12 also can be 2, or a plurality of, or the like.
Between each pile foundation sections; Comprise and first joint pile foundation sections between, can adopt existing prestressing force such as prestress wire or prestressed reinforcement to connect, or other connected modes commonly used in the art; To realize the fixed connection of sufficient intensity, especially shear strength.
Below briefly explain the construction technology of concavo-convex square precast concrete sections of the present invention stake:
At first, in precasting yard preformed pile base pitch section, and be transported to the job site.The length of pile foundation sections is selected, can carry out plurality of segments according to the length of design pile body.The diameter of pile foundation sections is identical with the diameter of design pile body.
Then, place, stake position as shown in Figure 4, selected at the construction field (site) adopts static pressure method that guide peg 4 is sunk to below the construction plane of the soil body 5.Guide peg 4 is to spend good rigidity parts always, is used for the sinking direction at follow-up work step guiding pile foundation sections.
As shown in Figure 5, the pilot hole 12 of the first pile foundation sections 1A (being the said first joint pile foundation sections of preamble) is set in (among following Fig. 4 to Fig. 8, be the svelteness that guarantees in the diagram, the concavo-convex square lines on the pile foundation sections sidewall are not shown) on the guide peg 4 movably.
Adopt the method for pile vibrosinking, the first pile foundation sections 1A is sunk to the underground of the soil body 5 along guide peg 4 directions.
Especially, in pile vibrosinking, also adopt the fetch earth mode of operation, edge injection or water spray operation of limit to reduce the resistance of 5 pairs of pile foundation sections of soft foundation soil body 1A.
Particularly, the aforementioned operation of fetching earth is when pile vibrosinking, dig out or the inner chamber 2 of the hollow of sucking-off pile foundation sections 1A in the soil body.
Aforementioned jet or water spray operation; Be specially when pile vibrosinking; Through the soil body 5 jet or water sprays in 13 pairs of pile foundation sections of the through hole 1A on the pile foundation sections 1A sidewall outside, formation air curtain or water curtain between the outer wall of pile foundation sections 1A and the soil body 5 are to reduce frictional resistance between the two.
As shown in Figure 6, in the pilot hole of the second pile foundation sections 1B, wear guide peg 4.Adopt the prestress wire connected mode, the second pile foundation sections 1B and the first pile foundation sections 1A 3 are fixedly connected in the junction.
Repeat above-mentioned work step, adopt vibrosinking, and be aided with the operation of fetching earth, jet or water spray operation, sink to the underground of soil 5 together with the first pile foundation sections 1A until the second pile foundation sections 1B.
Afterwards, as shown in Figure 7, the prism of third order base pitch section of constructing successively 1C, the 4th pile foundation sections 1D.
According to the length requirement of design pile body, repeat above-mentioned work step construction to the N pile foundation sections 1N that satisfies the requirement of design pile body.As shown in Figure 8, make the pile foundation sections of requirement be sink to the underground of the soil body 5.
Afterwards, can also from the soil body 5, extract and reclaim guide peg 4.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art need not creative work and just can design according to the present invention make many modifications and variation.Therefore, all technician in the art all should be in the determined protection domain by claims under this invention's idea on the basis of existing technology through the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (5)
1. concavo-convex square precast concrete sections stake comprises a plurality of pile foundation sections, is fixedly connected sequentially between each said pile foundation sections; Said pile foundation sections is the hollow structure that inner chamber connects; In the inner chamber of said pile foundation sections, be provided with fetch earth passage and guide frame, said inner chamber is double does the said passage that fetches earth; Said guide frame comprises support arm and is used to wear the pilot hole of guide peg, also offers a plurality of through holes jet or water spray that are used on the sidewall of said pile foundation sections; It is characterized in that: the cross section of said pile foundation sections is concavo-convex square.
2. concavo-convex square precast concrete sections as claimed in claim 1 stake is characterized in that: the front end face of said pile foundation sections also is provided with the steel work shoe.
3. concavo-convex square precast concrete sections as claimed in claim 1 stake is characterized in that: said support arm is a steel construction piece, is fixedly connected with said pile foundation sections.
4. concavo-convex square precast concrete sections as claimed in claim 1 stake is characterized in that: said pile foundation sections is respectively arranged with said guide frame in the position near front end and rear end.
5. concavo-convex square precast concrete sections as claimed in claim 1 stake is characterized in that: the fixed connection between each said pile foundation sections is that prestressing force connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100389311A CN102561321A (en) | 2012-02-20 | 2012-02-20 | Pile with concave-convex square prefabricated concrete segments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100389311A CN102561321A (en) | 2012-02-20 | 2012-02-20 | Pile with concave-convex square prefabricated concrete segments |
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| Publication Number | Publication Date |
|---|---|
| CN102561321A true CN102561321A (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100389311A Pending CN102561321A (en) | 2012-02-20 | 2012-02-20 | Pile with concave-convex square prefabricated concrete segments |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153348A (en) * | 2014-07-10 | 2014-11-19 | 大连大金马基础建设有限公司 | Concave-convex friction pile |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2540445Y (en) * | 2002-04-25 | 2003-03-19 | 李毓锦 | Reinforced concrete prefibricated pile |
| CN201089893Y (en) * | 2007-09-06 | 2008-07-23 | 铁道第四勘察设计院 | Foundation pit circle shield prefabricated driven pile |
| CN101328710A (en) * | 2008-07-25 | 2008-12-24 | 孔清华 | Synchronous soil lifting grouting rectangular filling pile apparatus and method |
| KR100938394B1 (en) * | 2009-04-17 | 2010-01-22 | (주)서현컨스텍 | Phc pile with imbeded steel pipe |
| CN202466575U (en) * | 2012-02-20 | 2012-10-03 | 上海市城市建设设计研究总院 | Concave-convex square prefabricated concrete section pile |
-
2012
- 2012-02-20 CN CN2012100389311A patent/CN102561321A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2540445Y (en) * | 2002-04-25 | 2003-03-19 | 李毓锦 | Reinforced concrete prefibricated pile |
| CN201089893Y (en) * | 2007-09-06 | 2008-07-23 | 铁道第四勘察设计院 | Foundation pit circle shield prefabricated driven pile |
| CN101328710A (en) * | 2008-07-25 | 2008-12-24 | 孔清华 | Synchronous soil lifting grouting rectangular filling pile apparatus and method |
| KR100938394B1 (en) * | 2009-04-17 | 2010-01-22 | (주)서현컨스텍 | Phc pile with imbeded steel pipe |
| CN202466575U (en) * | 2012-02-20 | 2012-10-03 | 上海市城市建设设计研究总院 | Concave-convex square prefabricated concrete section pile |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153348A (en) * | 2014-07-10 | 2014-11-19 | 大连大金马基础建设有限公司 | Concave-convex friction pile |
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Application publication date: 20120711 |