CN102505688A - Accurate guiding construction process of prefabricated pile sections - Google Patents
Accurate guiding construction process of prefabricated pile sections Download PDFInfo
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- CN102505688A CN102505688A CN2011102887961A CN201110288796A CN102505688A CN 102505688 A CN102505688 A CN 102505688A CN 2011102887961 A CN2011102887961 A CN 2011102887961A CN 201110288796 A CN201110288796 A CN 201110288796A CN 102505688 A CN102505688 A CN 102505688A
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Abstract
The invention discloses accurate guiding construction process of prefabricated pile sections. The accurate guiding construction process includes steps that the first step: pile base sections are prefabricated and conveyed to a construction field; the second step: a guiding rod is sunk into the ground; the third step: a first pile base section is sleeved on the guiding rod and is sunk into the ground along the direction of the guiding rod by a pile vibrosinking method, and resistance of soil of a soft soil foundation to the pile base section is reduced by means of taking the soil and jetting air or spraying water simultaneously while pile vibrosinking is carried out; the fourth step: a second pile base section is connected with the first pile base section, and the third step is repeated until the first pile base section and the second pile base section sink into the ground together; and the fifth step: the third step and the fourth step are repeated, and a third pile base section, a fourth pile base section to an Nth pile base section are successively constructed, so that a plurality of needed pile base sections sink into the ground. The accurate guiding construction process which adopts guiding technology realizes accurate guiding construction of the prefabricated pile sections, and has the advantages of high precision, convenience in construction, 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 accurate guiding construction technology of prefabricated subsection stake.
Background technology
At present, the pile foundation of soft foundation bridge adopts preformed pile or bored pile form usually.
Square or the tubular cross section of the general employing of preformed pile adopts hammering or pile vibrosinking during construction.Receive the restrictions such as power and geological conditions of construction equipment, the size of preformed pile all less (general diameter is below 600 millimeters).The technical problem underlying that preformed pile exists is:
1) noise that sends of the construction operation of driven pile is very big, improves constantly along with what urban environmental protection required, and driven pile is because the negative effect of noise, vibration has been inappropriate in the city adopts;
2) pile vibrosinking is limited to the construction equipment requirement, generally is only applicable to the pile foundation of small building, and the section of stake is less, and length is lacked (in general 30 meters), and therefore the supporting capacity requirement that does not reach bridge pile foundation can not be applicable to the construction of bridge pile foundation.
Bored pile is the comparatively general a kind of pile foundation type of in the scope of city, constructing at present, and size all big (general diameter is more than 600 millimeters) has the low advantage of construction noise.Its main working procedure is boring and 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 2～3 days construction period;
2) high to the site operation technical requirements, the pile holes protecting wall of soft foundation has operation to cause the hole of collapsing accidentally easily when construction slightly, and generation causes the accident;
3) environment is had pollution, the mud that produces during construction can be to problems such as environment pollute;
4) concrete strength of pile foundation is not high, and the underwater casting concrete strength generally can only reach C30.
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 that a kind of environment pollution is little, the accurate prefabricated subsection stake of the guiding construction technology that accurately leads.
Summary of the invention
Because the above-mentioned defective of prior art, technical problem to be solved by this invention provides that a kind of guiding accuracy is high, construction technology is accurately led in the prefabricated subsection stake easily of constructing.
Be to realize above-mentioned purpose, the invention provides a kind of prefabricated subsection stake construction technology that accurately leads, may further comprise the steps:
Preferably, in the said step 3, the said operation of fetching earth be specially when pile vibrosinking, dig out or the hollow part of the said pile foundation sections of sucking-off in the soil body.
Preferably; In the said step 3; Said jet or water spray operation is specially when pile vibrosinking through the soil body jet or water spray of the through hole on the said pile foundation sections sidewall to the said pile foundation sections outside, and formation air curtain or water curtain are with the outer wall that reduces said pile foundation sections and the frictional force between the soil body between the outer wall of said pile foundation sections and the soil body.
Preferably, in the said step 4, adopt prestressing force to connect the said second pile foundation sections is connected with the said first pile foundation sections.
Preferably, after the said step 5, reclaim said guide peg.
Beneficial effect of the present invention:
Construction technology of the present invention has the following advantages:
1) adopts guiding technique, realize accurate pile sinking.
2) guide peg is recyclable, recycle, low-carbon environment-friendly.
3), higher bearing capacity of pile foundation is provided applicable to the major diameter preformed pile.
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 pile foundation prefabricate, on-the-spot mode of splicing, quickening speed of application, pile foundation quality guarantee easily.
6) adopt pile vibrosinking, realize low noise.
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 accurately the lead construction view of construction technology step 2 of prefabricated subsection stake of the present invention.
Fig. 2 is accurately the lead construction view of construction technology step 3 of prefabricated subsection stake of the present invention.
Fig. 3 is accurately the lead construction view of construction technology step 4 of prefabricated subsection stake of the present invention.
Fig. 4 is accurately the lead construction view of construction technology step 5 of prefabricated subsection stake of the present invention.
Fig. 5 is accurately the lead construction view of construction technology step 6 of prefabricated subsection stake of the present invention.
Fig. 6 is accurately the lead plan structure sketch map of the prefabricated subsection stake one specific embodiment king-pile base pitch section in the construction technology of prefabricated subsection stake of the present invention.
Fig. 7 is an A-A portion sectional structure sketch map among Fig. 1.
Fig. 8 is the broken section structural representation of first section pile foundation sections in prefabricated subsection stake one specific embodiment.
The specific embodiment
Prefabricated subsection stake of the present invention 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.。
Soft foundation major diameter prefabricated subsection pile constructing process one specific embodiment of the present invention may further comprise the steps:
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.
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.
Repeating step three adopts vibrosinking, and is aided with the operation of fetching earth, jet or water spray operation, sinks to the underground of soil 5 until the second pile foundation sections 1B together with the first pile foundation sections 1A.
Afterwards, step 5 is repeating step three, step 4, and is as shown in Figure 4, 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 steps three, step 4 construction to satisfying the N pile foundation sections 1N that the design pile body requires.As shown in Figure 5, make the pile foundation sections of requirement be sink to the underground of the soil body 5.
Afterwards, guide peg 4 can also extracted and reclaim to step 6 from the soil body 5.
Construction technology of the present invention except have guiding accurately, construction facility etc. is the beneficial effect; Can realize that also the batch production beyond the job site is prefabricated; And has an advantage of low noise; Realize prefabricated, major diameter, the low noise of soft foundation pile foundation construction, solved little, the heavy-polluted defective of construction noise of existing soft foundation preformed pile diameter.Simultaneously, construction technology of the present invention has solved also that the speed of existing construction process for bored pile is slow, construction quality produces shortcomings such as environment pollution when requiring high, construction.
The structure of the described pile foundation sections of preamble below is detailed.
Like Fig. 6, shown in Figure 7, 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.
Particularly, guide frame 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.
The structural representation of section pile foundation sections headed by as shown in Figure 8.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 formation steel work shoes, 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 8, also can be not do illustrated trapezoidal at outer wall.
In addition, with reference to shown in Figure 8, 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 saving between the pile foundation sections, can adopt prestress wire or prestressed reinforcement to connect, or present technique field other connected modes commonly used, to realize the fixed connection of sufficient intensity, especially shear strength.
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. prefabricated subsection stake construction technology that accurately leads may further comprise the steps:
Step 1 in precasting yard preformed pile base pitch section, and is transported to the job site with a plurality of said pile foundation sections of prefabricated completion when needed;
Step 2, selected at the construction field (site) place, stake position adopts static pressure method will be used to guide the guide peg of pile foundation sections sinking direction to sink to underground;
Step 3 is set in the first pile foundation sections in a plurality of said pile foundation sections on the said guide peg movably, adopts the method for pile vibrosinking to sink to underground along said guide peg direction the said first pile foundation sections; In pile vibrosinking, 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 to the pile foundation sections;
Step 4 is connected the second pile foundation sections in a plurality of said pile foundation sections with the said first pile foundation sections; Said guide peg is located among the said second pile foundation sections; Repeating step three sinks to underground until the said first pile foundation sections together with the said second pile foundation sections;
Step 5, repeating step three, step 4, the prism of third order base pitch section of constructing successively, the 4th pile foundation sections to the N pile foundation sections make a plurality of required pile foundation sections be sink to underground.
2. the prefabricated subsection stake as claimed in claim 1 construction technology that accurately leads, wherein, in the said step 3, the said operation of fetching earth be specially when pile vibrosinking, dig out or the hollow part of the said pile foundation sections of sucking-off in the soil body.
3. the prefabricated subsection stake as claimed in claim 1 construction technology that accurately leads; Wherein, In the said step 3; Said jet or water spray operation is specially when pile vibrosinking through the soil body jet or water spray of the through hole on the said pile foundation sections sidewall to the said pile foundation sections outside, and formation air curtain or water curtain are with the outer wall that reduces said pile foundation sections and the frictional force between the soil body between the outer wall of said pile foundation sections and the soil body.
4. the prefabricated subsection stake as claimed in claim 1 construction technology that accurately leads wherein, in the said step 4, adopts prestress steel to connect the said second pile foundation sections is connected with the said first pile foundation sections.
5. arbitrary described prefabricated subsection stake construction technology that accurately leads like claim 1 to 4 wherein, after the said step 5, reclaims said guide peg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110288796 CN102505688B (en) | 2011-09-26 | 2011-09-26 | Accurate guiding construction process of prefabricated pile sections |
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| CN 201110288796 CN102505688B (en) | 2011-09-26 | 2011-09-26 | Accurate guiding construction process of prefabricated pile sections |
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| CN102505688A true CN102505688A (en) | 2012-06-20 |
| CN102505688B CN102505688B (en) | 2013-10-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628479A (en) * | 2012-08-27 | 2014-03-12 | 上海中技桩业股份有限公司 | Shaft-bottom power-head counterboring precast-pile pressing construction method and device |
| CN108442371A (en) * | 2018-05-17 | 2018-08-24 | 中铁十六局集团第三工程有限公司 | One kind stake combination casing structure and its construction method suitable for Soft Clay water |
| CN109778857A (en) * | 2018-11-30 | 2019-05-21 | 北京荣创岩土工程股份有限公司 | A kind of prefabricated pile is from pilot hole device and prefabricated pile from pilot hole pile making method |
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| JP2674861B2 (en) * | 1989-04-28 | 1997-11-12 | 住友商事株式会社 | Soil / Nail driving method and device |
| JP2678566B2 (en) * | 1994-03-15 | 1997-11-17 | 株式会社技研製作所 | Pile, pile wall and pile wall construction method |
| JP3659767B2 (en) * | 1997-05-09 | 2005-06-15 | 新日本製鐵株式会社 | Temporary fixing method and apparatus for pillars when inserting plug-in pillars |
| CN101469542A (en) * | 2007-12-26 | 2009-07-01 | 上海金炫建设工程有限公司 | Farmland pressed pile technological process |
| CN101581097A (en) * | 2009-05-22 | 2009-11-18 | 中交第一航务工程局有限公司 | Vibration sinking technology method of large-sized combined steel plate pile |
| CN101798814A (en) * | 2010-03-08 | 2010-08-11 | 南通润邦重机有限公司 | Aligning and guiding device for engineering tubular pile |
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2011
- 2011-09-26 CN CN 201110288796 patent/CN102505688B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2674861B2 (en) * | 1989-04-28 | 1997-11-12 | 住友商事株式会社 | Soil / Nail driving method and device |
| JP2678566B2 (en) * | 1994-03-15 | 1997-11-17 | 株式会社技研製作所 | Pile, pile wall and pile wall construction method |
| JP3659767B2 (en) * | 1997-05-09 | 2005-06-15 | 新日本製鐵株式会社 | Temporary fixing method and apparatus for pillars when inserting plug-in pillars |
| CN101469542A (en) * | 2007-12-26 | 2009-07-01 | 上海金炫建设工程有限公司 | Farmland pressed pile technological process |
| CN101581097A (en) * | 2009-05-22 | 2009-11-18 | 中交第一航务工程局有限公司 | Vibration sinking technology method of large-sized combined steel plate pile |
| CN101798814A (en) * | 2010-03-08 | 2010-08-11 | 南通润邦重机有限公司 | Aligning and guiding device for engineering tubular pile |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628479A (en) * | 2012-08-27 | 2014-03-12 | 上海中技桩业股份有限公司 | Shaft-bottom power-head counterboring precast-pile pressing construction method and device |
| CN103628479B (en) * | 2012-08-27 | 2017-05-10 | 上海中技桩业股份有限公司 | Shaft-bottom power-head counterboring precast-pile pressing construction method and device |
| CN108442371A (en) * | 2018-05-17 | 2018-08-24 | 中铁十六局集团第三工程有限公司 | One kind stake combination casing structure and its construction method suitable for Soft Clay water |
| CN109778857A (en) * | 2018-11-30 | 2019-05-21 | 北京荣创岩土工程股份有限公司 | A kind of prefabricated pile is from pilot hole device and prefabricated pile from pilot hole pile making method |
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| CN102505688B (en) | 2013-10-30 |
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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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