CN102433872B - Large-diameter concrete prefabricated segment pile of soft soil foundation - Google Patents
Large-diameter concrete prefabricated segment pile of soft soil foundation Download PDFInfo
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- CN102433872B CN102433872B CN201110287962.6A CN201110287962A CN102433872B CN 102433872 B CN102433872 B CN 102433872B CN 201110287962 A CN201110287962 A CN 201110287962A CN 102433872 B CN102433872 B CN 102433872B
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Abstract
The invention discloses a large-diameter concrete prefabricated segment pile of a soft soil foundation, which comprises a plurality of pile foundation segments, wherein the plurality of pile foundation segments are sequentially and fixedly connected and are of a hollow structure with a through inner cavity, a soil borrowing channel and a guide structure are arranged in the inner cavity of the pile foundation segments, the inner cavity can be also used as the soil borrowing channel, the guide structure comprises a support arm and a guide hole, the guide hole is used for a guide rod to be installed in a penetrating way, and a plurality of through holes are further formed on the lateral walls of the pile foundation segments and are used for air or water spraying. Due to the adoption of the structure design, the obtained large-diameter concrete prefabricated segment pile has the advantages of high guidance, low construction resistance and the like.
Description
Technical field
The present invention relates to the technical field of building of soft foundation bridge, relate in particular to a kind of soft foundation large-diameter concrete prefabricated pile sections.
Background technology
At present, the pile foundation of soft foundation bridge adopts preformed pile or bored pile form conventionally.
Square or the tubular cross section of the general employing of preformed pile, adopts hammering or pile vibrosinking when construction.Be subject to the restriction such as power and geological conditions of construction equipment, the size all less (general diameter is below 600 millimeters) of preformed pile.The technical problem underlying that preformed pile exists is:
1) noise that the construction operation of driven pile sends is very large, and along with improving constantly that urban environmental protection requires, driven pile is because the negative effect of noise, vibration has been unsuitable for adopting in city;
2) pile vibrosinking is limited to construction equipment requirement, generally be only applicable to the pile foundation of small building, the section of stake is less, length shorter (in general 30 meters), the supporting capacity requirement that does not reach bridge pile foundation, therefore can not be applicable to the construction of bridge pile foundation.
Bored pile is the comparatively general a kind of pile foundation type of constructing within the scope of city at present, and size is large (general diameter is more than 600 millimeters) all, has advantages of that construction noise is low.Its main working procedure is boring the mud off → clear end → descending reinforcing cage → cast in situs underwater concrete.The technical problem underlying that bored pile exists is:
1) speed of application is slow, and the construction of general 1 pile needs the construction period of 2～3 days;
2) high to site operation technical requirements, the pile holes protecting wall of soft foundation when construction slightly operation accidentally easily cause collapse hole, generation causes the accident;
3) environment is had to pollution, the mud producing when construction can be to problems such as environments;
4) concrete strength of pile foundation is not high, and underwater casting concrete strength generally can only reach C30.
In sum, for how to realize large diameter bridge pile foundation on soft foundation, there is no at present good solution.
Therefore, those skilled in the art is devoted to a kind of simple in structure, soft foundation large-diameter concrete prefabricated pile sections easily of constructing of exploitation.
Summary of the invention
Because the above-mentioned defect of prior art, technical problem to be solved by this invention is to provide that a kind of guidance quality is good, the little large-diameter concrete prefabricated pile sections that is applicable to soft foundation of construction resistance.
For achieving the above object, the invention provides a kind of soft foundation large-diameter concrete prefabricated pile sections, comprise multiple pile foundation sections, between each described pile foundation sections, be fixedly connected sequentially; Described pile foundation sections is the hollow structure that inner chamber connects; In the inner chamber of described pile foundation sections, be provided with fetch earth passage and guide frame, described inner chamber the is double passage that fetches earth described in doing; Described guide frame comprises support arm and for wearing the pilot hole of guide peg, also offers multiple for through hole jet or water spray on the sidewall of described pile foundation sections.
Preferably, the front end face of described pile foundation sections is also provided with steel work shoe.
Preferably, described support arm is steel construction piece, is fixedly connected with described pile foundation sections.
Preferably, described pile foundation sections is being respectively arranged with described guide frame near the position of front end and rear end.
Preferably, the prestressing force that is fixedly connected as between each described pile foundation sections connects.
Beneficial effect of the present invention:
Soft foundation large-diameter concrete prefabricated pile sections of the present invention, due to said structure design, has the advantages such as guidance quality is good, construction resistance is little.
For the weak point of existing soft foundation pile foundation (especially large diameter pile foundation) technology, the soft foundation large-diameter concrete prefabricated pile sections that the present invention proposes, can meet diameter on soft foundation and reach the pile foundation requirement that 3 meters of left and right, length reach 50～60 meters.
Owing to having adopted said structure design, it is prefabricated that soft foundation large-diameter concrete prefabricated pile sections of the present invention can be realized job site batch production in addition, and in its construction, tool has the following advantages:
1) adopt pile foundation prefabricate, on-the-spot mode of splicing, quickening speed of application, pile foundation quality easily guarantee.
2) adopt pile vibrosinking, realize low noise.
3) adopt major diameter preformed pile, higher bearing capacity of pile foundation is provided.
4) in sinking process, take the mode fetching earth in stake, gas (water) curtain is assisted sinking, reduce resistance, reduced the power requirement of equipment.
5) adopt guiding technique, realize accurate pile sinking.
6) guide peg is recyclable, recycles low-carbon environment-friendly.
In sum, soft foundation large-diameter concrete prefabricated pile sections of the present invention is in its construction technology, there is low noise, realize prefabricated, major diameter, the low noise of soft foundation pile foundation construction, solved that existing soft foundation preformed pile diameter is little, the heavy-polluted defect of construction noise.Meanwhile, also solved that the speed of existing construction process for bored pile is slow, construction quality produces the shortcomings such as environment pollution while requiring high, construction.
Below with reference to accompanying drawing, the technique effect of design of the present invention, concrete structure and generation is described further, to understand fully object of the present invention, feature and effect.
Accompanying drawing explanation
Fig. 1 is the plan structure schematic diagram of soft foundation large-diameter concrete prefabricated pile sections one specific embodiment pile foundation sections of the present invention.
Fig. 2 is A-A portion sectional structure schematic diagram in Fig. 1.
Fig. 3 is the broken section structural representation of first section of pile foundation sections in soft foundation large-diameter concrete prefabricated pile sections of the present invention one specific embodiment.
Fig. 4 is the Construction State schematic diagram of soft foundation large-diameter concrete prefabricated pile sections of the present invention in construction.
Fig. 5 is the Construction State schematic diagram of soft foundation large-diameter concrete prefabricated pile sections of the present invention in construction.
Fig. 6 is the Construction State schematic diagram of soft foundation large-diameter concrete prefabricated pile sections of the present invention in construction.
Fig. 7 is the Construction State schematic diagram of soft foundation large-diameter concrete prefabricated pile sections of the present invention in construction.
Fig. 8 is the Construction State schematic diagram of soft foundation large-diameter concrete prefabricated pile sections of the present invention in construction.
The specific embodiment
Soft foundation large-diameter concrete prefabricated pile sections of the present invention comprises multiple pile foundation sections, and formation one is fixedly connected sequentially between each pile foundation sections.
In each pile foundation sections, except first section of pile foundation sections, the form of structure of other pile foundation sections at different levels is all identical, prefabricated with the scale of being more convenient for, and reduces die cost.The wherein structure of a pile foundation sections is below described in detail in detail.
As shown in Figure 1 and Figure 2, a pile foundation sections 1 is surrounded and is formed inner chamber 2 by sidewall 10, and inner chamber 2 connects wherein, and the double passage that fetches earth, and is also provided with guide frame in inner chamber 2.
Particularly, the guide frame in the present embodiment comprises three uniform in a circumferential direction support arms 11, and for wearing the pilot hole 12 of guide peg.Support arm 11 is steel construction piece, is fixedly connected with (or together with being cast in) with the sidewall 10 of pile foundation sections 1.Guide peg is not a part for pile foundation sections 1, and its structure and function, hereinafter separately state.
On the sidewall 10 of pile foundation sections 1, be reserved with vertical pipeline and multiple through hole 13 for jet or water spray (technical term is " gas tabernacle "), to apply gas or the water of high pressure from the aperture of ground pile lining.
Be illustrated in figure 3 the structural representation of first section of pile foundation sections in pile foundation sections of the present invention.The structure of the structure of first section of pile foundation sections and pile foundation sections at different levels is basic identical, institute's difference is, for ease of entering the soil body, reduces the frictional resistance with the soil body, front end face at first section of pile foundation sections is also provided with inclined-plane 14, forms the shoe of steel work to decompose the frictional resistance of vertical direction.
The set-up mode on inclined-plane 14 can, for as shown in Figure 3 the shape that extends out of inwall, can be also not do the illustrated inverted trapezoidal at outer wall.
In addition, shown in figure 3, in different embodiment, pile foundation sections can be near the position of front end and rear end, aforesaid guide frame being set respectively, to obtain better guide effect.
In other embodiments, the form of guide frame is also not limited to above embodiment.For example, the quantity of support arm 11 can be also 2 or 4 or multiple (but the support arm of excessive number can affect 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 can be also 2, or multiple, etc.
Between each pile foundation sections, comprise and head saves between pile foundation sections, can adopt the existing prestressing force such as prestress wire or prestressed reinforcement to connect, or other conventional connected modes in the art, to realize sufficient intensity, being especially fixedly connected with of shear strength.
Below briefly explain the construction technology of soft foundation large-diameter concrete prefabricated pile sections of the present invention:
First, in precasting yard preformed pile base pitch section, and be transported to job site.The length of pile foundation sections is selected, can carry out some segmentations according to the length of design pile body.The diameter of pile foundation sections is identical with the diameter of design pile body.
Then, as shown in Figure 4, selected stake position place, adopts static pressure method that guide peg 4 is sunk to below the construction plane of the soil body 5 at the construction field (site).Guide peg 4 is the rigidity parts of always having spent, for guide the sinking direction of pile foundation sections at follow-up work step.
As shown in Figure 5, the pilot hole 12 of the first pile foundation sections 1A (described head saves pile foundation sections above) is set on guide peg 4 movably.
The method that adopts pile vibrosinking, sinks to the underground of the soil body 5 by the first pile foundation sections 1A 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 the soft foundation soil body 5 to pile foundation sections 1A.
Particularly, the aforementioned operation of fetching earth is in the time of 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 in the time of pile vibrosinking, by the through hole 13 on pile foundation sections 1A sidewall to the soil body 5 in pile foundation sections 1A outside jet or water spray, between the outer wall of pile foundation sections 1A and the soil body 5, form air curtain or water curtain, 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 prestress wire connected mode, the second pile foundation sections 1B is fixed and is connected in junction 3 with the first pile foundation sections 1A.
Repeat above-mentioned work step, adopt vibrosinking, and be aided with the operation of fetching earth, jet or water spray operation, until the second pile foundation sections 1B sinks to the underground of soil 5 together with the first pile foundation sections 1A.
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 meets 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 just can design according to the present invention make many modifications and variations without creative work.Therefore, all technician in the art, all should be in by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (5)
1. a soft foundation large-diameter concrete prefabricated pile sections, comprises multiple pile foundation sections, between each described pile foundation sections, is fixedly connected sequentially; It is characterized in that: described pile foundation sections is the hollow structure that inner chamber connects; In the inner chamber of described pile foundation sections, be provided with fetch earth passage and guide frame, described inner chamber the is double passage that fetches earth described in doing; Described guide frame comprises support arm and for wearing the pilot hole of guide peg, on the sidewall of described pile foundation sections, also offer vertical pipeline and multiple for through hole jet or water spray, described through hole one port and described pipeline conducting, another port is opened on the outer wall of described pile foundation sections, to apply gas or the water of high pressure from the aperture of ground pile lining, by described through hole to the soil body in described pile foundation sections outside jet or water spray, between the outer wall of described pile foundation sections and the described soil body, form air curtain or water curtain.
2. soft foundation large-diameter concrete prefabricated pile sections as claimed in claim 1, is characterized in that: the front end face of described pile foundation sections is also provided with steel work shoe.
3. soft foundation large-diameter concrete prefabricated pile sections as claimed in claim 1, is characterized in that: described support arm is steel construction piece, is fixedly connected with described pile foundation sections.
4. soft foundation large-diameter concrete prefabricated pile sections as claimed in claim 1, is characterized in that: described pile foundation sections is being respectively arranged with described guide frame near the position of front end and rear end.
5. soft foundation large-diameter concrete prefabricated pile sections as claimed in claim 1, is characterized in that: the prestressing force that is fixedly connected as between each described pile foundation sections connects.
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| CN201110287962.6A CN102433872B (en) | 2011-09-26 | 2011-09-26 | Large-diameter concrete prefabricated segment pile of soft soil foundation |
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| CN201110287962.6A CN102433872B (en) | 2011-09-26 | 2011-09-26 | Large-diameter concrete prefabricated segment pile of soft soil foundation |
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| CN102433872A CN102433872A (en) | 2012-05-02 |
| CN102433872B true CN102433872B (en) | 2014-05-14 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106677073B (en) * | 2017-02-14 | 2018-03-06 | 上海市城市建设设计研究总院（集团）有限公司 | Adapt to the semi-monolithic formula seamless bridge construction method of soft soil foundation |
| CN106638256B (en) * | 2017-02-14 | 2018-03-30 | 上海市城市建设设计研究总院（集团）有限公司 | Adapt to the semi-monolithic formula seamless bridge structure of soft soil foundation |
| CN114961106B (en) * | 2022-07-01 | 2023-09-15 | 中铁建工集团有限公司 | Ski field frame column structure and construction method |
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|---|---|---|---|---|
| CN2540445Y (en) * | 2002-04-25 | 2003-03-19 | 李毓锦 | Reinforced concrete prefibricated pile |
| CN1425831A (en) * | 2003-01-10 | 2003-06-25 | 颜肖鸿 | Butt device for prefabricated concrete pile and its producing method |
| CN201089893Y (en) * | 2007-09-06 | 2008-07-23 | 铁道第四勘察设计院 | Foundation pit circle shield prefabricated driven pile |
| CN201276701Y (en) * | 2008-09-12 | 2009-07-22 | 黑龙江省建工集团有限责任公司 | Prefabricated assembly type concrete pile foundation |
| KR100938394B1 (en) * | 2009-04-17 | 2010-01-22 | (주)서현컨스텍 | Phc pile with imbeded steel pipe |
| CN202298603U (en) * | 2011-09-26 | 2012-07-04 | 上海市城市建设设计研究总院 | Large diameter concrete precast section pile suitable for soft soil foundation |
-
2011
- 2011-09-26 CN CN201110287962.6A patent/CN102433872B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2540445Y (en) * | 2002-04-25 | 2003-03-19 | 李毓锦 | Reinforced concrete prefibricated pile |
| CN1425831A (en) * | 2003-01-10 | 2003-06-25 | 颜肖鸿 | Butt device for prefabricated concrete pile and its producing method |
| CN201089893Y (en) * | 2007-09-06 | 2008-07-23 | 铁道第四勘察设计院 | Foundation pit circle shield prefabricated driven pile |
| CN201276701Y (en) * | 2008-09-12 | 2009-07-22 | 黑龙江省建工集团有限责任公司 | Prefabricated assembly type concrete pile foundation |
| KR100938394B1 (en) * | 2009-04-17 | 2010-01-22 | (주)서현컨스텍 | Phc pile with imbeded steel pipe |
| CN202298603U (en) * | 2011-09-26 | 2012-07-04 | 上海市城市建设设计研究总院 | Large diameter concrete precast section pile suitable for soft soil foundation |
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Address after: 200011 Tibet South Road, Shanghai, No. 1170, No. Patentee after: Shanghai urban construction design & Research Institute (Group) Co., Ltd. Address before: 200125 Dongfang Road, Shanghai, Pudong New Area, No. 3447 Patentee before: Shanghai Urban Construction Design & Research Institute |
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