CN102505688B - Accurate guiding construction process of prefabricated pile sections - Google Patents
Accurate guiding construction process of prefabricated pile sections Download PDFInfo
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- CN102505688B CN102505688B CN 201110288796 CN201110288796A CN102505688B CN 102505688 B CN102505688 B CN 102505688B CN 201110288796 CN201110288796 CN 201110288796 CN 201110288796 A CN201110288796 A CN 201110288796A CN 102505688 B CN102505688 B CN 102505688B
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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 process of prefabricated pile sections.
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.Be subjected to the restrictions such as the power of construction equipment and geological conditions, 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 large, along with improving constantly that urban environmental protection requires, driven pile since the negative effect of noise, vibration be unsuitable in the city, adopting;
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 constructing in the scope of city at present, and size is large (general diameter is more than 600 millimeters) all, 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 slightly has operation accidentally to cause easily the hole of collapsing when construction, and generation causes the accident;
3) environment is had pollution, the mud that produces during construction can be to problems such as environments;
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 at present good solution 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, accurate accurate guiding construction process of prefabricated pile sections leads.
Summary of the invention
Because the defects of prior art, technical problem to be solved by this invention provides a kind of guiding accuracy height, the easily accurate guiding construction process of prefabricated pile sections of constructing.
For achieving the above object, the invention provides a kind of accurate guiding construction process of prefabricated pile sections, may further comprise the steps:
Step 3 is set in the first pile foundation sections in a plurality of described pile foundation sections on the described guide peg movably, adopts the method for pile vibrosinking to sink to underground along described guide peg direction described the 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 soft foundation soil body to the resistance of pile foundation sections.
Preferably, in the described step 3, the described operation of fetching earth be specially when pile vibrosinking, dig out or the hollow part of the described pile foundation sections of sucking-off in the soil body.
Preferably, in the described step 3, described jet or water spray operation is specially when pile vibrosinking by the soil body jet or water spray of the through hole on the described pile foundation sections sidewall to the described pile foundation sections outside, and formation air curtain or water curtain are with the outer wall that reduces described pile foundation sections and the frictional force between the soil body between the outer wall of described pile foundation sections and the soil body.
Preferably, in the described step 4, adopt prestressing force to connect described the second pile foundation sections is connected with described the first pile foundation sections.
Preferably, after the described step 5, reclaim described 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, and is recycling, low-carbon environment-friendly.
3) applicable to the major diameter preformed pile, provide higher bearing capacity of pile foundation.
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.
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete structure and generation, to understand fully purpose of the present invention, feature and effect.
Description of drawings
Fig. 1 is the Construction State schematic diagram of accurate guiding construction process of prefabricated pile sections step 2 of the present invention.
Fig. 2 is the Construction State schematic diagram of accurate guiding construction process of prefabricated pile sections step 3 of the present invention.
Fig. 3 is the Construction State schematic diagram of accurate guiding construction process of prefabricated pile sections step 4 of the present invention.
Fig. 4 is the Construction State schematic diagram of accurate guiding construction process of prefabricated pile sections step 5 of the present invention.
Fig. 5 is the Construction State schematic diagram of accurate guiding construction process of prefabricated pile sections step 6 of the present invention.
Fig. 6 is the plan structure schematic diagram of the prefabricated pile sections one specific embodiment pile foundation sections in the accurate guiding construction process of prefabricated pile sections of the present invention.
Fig. 7 is A-A section sectional structure schematic diagram among Fig. 6.
Fig. 8 is the broken section structural representation of first section pile foundation sections in prefabricated pile sections one specific embodiment.
The specific embodiment
Prefabricated pile sections of the present invention comprises a plurality of pile foundation sections, and the formation one is fixedly connected sequentially between each pile foundation sections.
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, and is prefabricated with the scale of being more convenient for, and reduce die cost.。
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 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.
Step 3 as shown in Figure 2, is the described first joint pile foundation sections of preamble with the first pile foundation sections 1A() pilot hole 12 be set in movably on the guide peg 4.
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, by 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, until the second pile foundation sections 1B sinks to the underground of soil 5 together with the first pile foundation sections 1A.
Afterwards, step 5 is repeating step three, step 4, as shown in Figure 4, and 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, repetition above-mentioned steps three, step 4 construction are to the N pile foundation sections 1N that satisfies the requirement of design pile body.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 be extracted and reclaim to step 6 from the soil body 5.
Construction technology of the present invention is except having the beneficial effects such as guiding is accurate, construction is convenient, 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 the shortcomings such as environment pollution when requiring high, construction.
The structure of a previously described pile foundation sections below is described in detail in detail.
Such as 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 uniform in a circumferential direction support arms 11, and is used for wearing the pilot hole 12 of guide peg.Support arm 11 is steel construction piece, is fixedly connected with (or being cast in) with the sidewall 10 of pile foundation sections 1.Guide peg is not the part of pile foundation sections 1, and its structure and function are hereinafter stated in addition.
On the sidewall 10 of pile foundation sections 1, be reserved with vertical pipeline and a plurality of through hole 13 for jet or water spray (technical term is " gas tabernacle "), apply gas or the water of high pressure with the aperture from the ground pile lining.
The structural representation of section pile foundation sections 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 entering 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 inverted trapezoidal at outer wall.
In addition, with reference to shown in Figure 8, in different embodiment, the pile foundation sections can arrange respectively aforesaid guide frame 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 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 also can be 2, or a plurality of, etc.
Between each pile foundation sections, comprise and head saves between the pile foundation sections, can adopt prestress wire or prestressed reinforcement to connect, or the art other connected modes commonly used, to realize being fixedly connected with 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 variations.Therefore, all in the art technician all should be in the determined protection domain by 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. accurate guiding construction process of prefabricated pile sections may further comprise the steps:
Step 1 in precasting yard preformed pile base pitch section, and is transported to the job site with the prefabricated a plurality of described pile foundation sections of finishing when needed; Described pile foundation sections is surrounded by sidewall and forms inner chamber, and described inner chamber connects wherein, and the double passage that fetches earth of doing, and also is provided with guide frame in the described inner chamber; On the sidewall of described pile foundation sections, be reserved with vertical pipeline and a plurality of for through hole jet or water spray, apply gas or the water of high pressure with the aperture from the ground pile lining;
Step 2, selected place, stake position adopts static pressure method to sink to underground for the guide peg of guiding pile foundation sections sinking direction at the construction field (site);
Step 3 is set in the first pile foundation sections in a plurality of described pile foundation sections on the described guide peg movably, adopts the method for pile vibrosinking to sink to underground along described guide peg direction described the 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 soft foundation soil body to the resistance of pile foundation sections;
Step 4 is connected the second pile foundation sections in a plurality of described pile foundation sections with described the first pile foundation sections; Described guide peg is located among described the second pile foundation sections; Repeating step three is until described the first pile foundation sections sinks to underground together with described the 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. accurate guiding construction process of prefabricated pile sections as claimed in claim 1, wherein, in the described step 3, the described operation of fetching earth be specially when pile vibrosinking, dig out or the hollow part of the described pile foundation sections of sucking-off in the soil body.
3. accurate guiding construction process of prefabricated pile sections as claimed in claim 1, wherein, in the described step 3, described jet or water spray operation is specially when pile vibrosinking by the soil body jet or water spray of the through hole on the described pile foundation sections sidewall to the described pile foundation sections outside, and formation air curtain or water curtain are with the outer wall that reduces described pile foundation sections and the frictional force between the soil body between the outer wall of described pile foundation sections and the soil body.
4. accurate guiding construction process of prefabricated pile sections as claimed in claim 1 wherein, in the described step 4, adopts prestress steel to connect described the second pile foundation sections is connected with described the first pile foundation sections.
5. such as the arbitrary described accurate guiding construction process of prefabricated pile sections of claim 1 to 4, wherein, after the described step 5, reclaim described guide peg.
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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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| CN 201110288796 CN102505688B (en) | 2011-09-26 | 2011-09-26 | Accurate guiding construction process of prefabricated pile sections |
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| CN102505688B true CN102505688B (en) | 2013-10-30 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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| 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 |
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| CN102505688A (en) | 2012-06-20 |
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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 |