CN103422495A - Hollow cast-in-place pile and construction method thereof - Google Patents
Hollow cast-in-place pile and construction method thereof Download PDFInfo
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- CN103422495A CN103422495A CN2013103158934A CN201310315893A CN103422495A CN 103422495 A CN103422495 A CN 103422495A CN 2013103158934 A CN2013103158934 A CN 2013103158934A CN 201310315893 A CN201310315893 A CN 201310315893A CN 103422495 A CN103422495 A CN 103422495A
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Abstract
The invention relates to a hollow cast-in-place pile and a construction method thereof. The hollow cast-in-place pile comprises a solid pile body and a reinforcing cage arranged inside the solid pile body. The hollow cast-in-place pile is characterized in that a hollow body is arranged inside the solid pile body, the designed pile length of the solid pile body is no less than 30 meters, the diameter of the solid pile body is no less than 2.0 meters, the length of the hollow body is a value that 10 meters are subtracted from the 2/3 of the designed pile length, and the top face of the hollow body is located at the position below the pile top with the designed elevation by 1/3 of the designed pile length plus 5 meters. According to the hollow cast-in-place pile, a lifting device of a drilling machine is utilized for hoisting a vibration hammer, a drilling rod serves as a guiding rod, and the hollow body is vibrated to sink to the appointed position. Compared with an existing solid cast-in-place pile, the hollow cast-in-place pile has the advantage that the total bearing capacity of a pile foundation is improved by reducing the weight of the pile foundation under the premise that the pile end borne pressure and pile wall side friction are not changed.
Description
Technical field
The present invention relates to a kind of base form of field of civil engineering, relate in particular to the large diameter bored pile basis for construction work and bridge engineering.
Background technology
Bored pile foundation is as a kind of common base form, because construction technology is simply ripe, and is applicable to various geological conditionss, therefore is widely used in the every field such as all kinds of bridge engineering, construction work and hydraulic engineering.
Known by the force analysis to bored pile, pile foundation be take and born the pressure at right angle load as main, and horizontal loading is auxiliary, bridge engineering horizontal loading brake control power, wind load and other incidental loads; Construction work and hydraulic engineering horizontal loading are mainly wind load, fluid levels compressive load etc.The horizontal loading that pile foundation is born, because the top soil body and effect of elastic resistance, the horizontal force action effect is progressively decay from top to bottom.It is main that the cloth muscle of pile foundation mainly considers to bear horizontal loading, so the cloth muscle of pile foundation is also that top 1/3rd long cloth muscle are more, middle 1/3rd long cloth muscle reduce by half, and the long cloth muscle of generally not doing in 1/3rd of bottoms is considered.
For increasing the bearing capacity of bored pile, designing unit is generally according to the mechanics parameter of each soil layer in the geology exploration report, according to the computation rule of design specifications, by increasing Pile Diameter or increasing long realization of stake.But the increase in stake footpath and the long increase of stake also can cause the increase of the weight of pile foundation own, virtually increase gravity load and eat up part of the part supporting capacity simultaneously.So traditional bored pile exists deadweight larger, the deficiency that the part supporting capacity is eaten up part of.How by the deadweight that reduces pile foundation, to improve bearing capacity of pile foundation, it is a problem that is worth research, forefathers also once carried out discussion many times to this problem, but all because implementing difficulty, were not used widely greatly, and this difficult problem all is not well solved so far.
Summary of the invention
The objective of the invention is the deficiency existed for existing drill-pouring pile bearing capacity aspect, a kind of deadweight that can alleviate pile body is provided, improves novel hollow bored pile and the job practices thereof of effective bearing capacity of pile foundation.
The present invention is achieved through the following technical solutions:
The structure of given first hollow bored pipe, comprise the entity pile body with and interior reinforcing cage, it is characterized in that: be provided with hollow body in described entity pile body, the designing pile length of described entity pile body is not less than 30 meters, and the diameter of described entity pile body is not less than 2.0 meters; The length of described hollow body is that 2/3 designing pile length deducts 10 meters, and the hollow body end face is positioned at following 1/3 designing pile length of design of pile top absolute altitude and adds 5 meters.
Said structure is more preferably:
Described hollow body diameter is less 1.0 meters than entity pile body diameter.
Described hollow body bottom is conical.
Described hollow body is polymer fiber hollow body or HPDE hollow body.
Then provide the job practices of above-mentioned hollow bored pipe, comprise the following steps:
At first holed, carried out hole clearly after pore-forming, reinforcing cage is installed, then built pile concrete to calculating side's amount and predetermined elevation;
Secondly press down installation at the pile concrete initial set capable hollow body that advances, concrete steps are:
The first step: the top that first with drill's lifting tap lifting hollow body, is positioned to pile concrete;
Second step: with the drill's lifting tap, hang the peace vibro driver;
The 3rd step: connect first segment drilling rod guide rod at the vibropiling motor spindle with connector, hollow body suit cap is installed in drilling rod guide rod bottom;
The 4th step: transfer vibro driver to hollow body suit cap and hollow body top and coincide, first with the deadweight of vibro driver, press down hollow body;
The 5th step: then start the vibropiling machine vibration and press down hollow body, when first segment drilling rod guide rod presses to drilling machine platform, promote vibro driver, second section drilling rod guide rod is installed, then continue vibration and press down, so loop, until hollow body is transferred to design attitude;
The 6th step: after hollow body is depressed into design attitude, vibro driver stops vibration; Then remove hollow body suit cap, respectively save drilling rod guide rod and vibro driver;
After last hollow body installation, with the lining rope repetition measurement, the later stake top concrete surface elevation of hollow body is installed, after meeting standard and designing requirement, mobile drill is proceeded pile foundation construction to position, next hole.
Above-mentioned job practices can further be improved to:
Whether, after described vibro driver stops vibration, voltage stabilizing 10 minutes, will carry 20cm on the drilling rod guide rod, observe hollow body in 2 minutes and float, if floating presses down hollow body rear repetition voltage stabilizing operation again.
Described pile concrete is efficient slow setting underwater concrete, and guarantees to start to transfer and be controlled at pile concrete the total time put in place in the initial setting time to hollow body from the pile concrete perfusion.
Implant hollow body in pile concrete after, the stake top concrete elevation after the implantation hollow body exceeds and is not less than 0.5 meter than design altitude.
Hollow bored pipe of the present invention is the lifting gear that utilizes rig itself, and the vibration hammer that plays, to assigned address, is compared the hollow body vibration-sunk as guide rod with drilling rod with existing solid bored pile, have following remarkable advantage:
1, under stake end pressure-bearing and the constant prerequisite of pile lining side friction, by alleviating the deadweight of pile foundation itself, improve the overall bearing capacity of pile foundation.
2, the implantation of hollow body, save the pile foundation concrete amount, is conducive to economize on resources, and meets the policy development direction of national energy-saving environmental protection.
3, hollow body can adopt the mode of factory's customization, and machining accuracy is high, and cost is lower.
When 4, vibration presses down hollow body, the effect of vibration of vibro driver makes the pile concrete of having built more closely knit.
5, the sinking of hollow body can utilize the crane gear of rig self, utilizes the guide rod of drilling rod as the below hollow body, does not need to process special-purpose guide rod in addition, and construction cost is lower, and construction technology is simple, is convenient to apply on a large scale.
The accompanying drawing explanation
Fig. 1 is the hollow bored pipe organigram;
The lateral view that Fig. 2 is Fig. 1;
Fig. 3 is the hollow position view of hollow bored pipe;
Fig. 4 is hollow bored pipe construction schematic diagram;
In figure: 1, cushion cap (binder), 2, reinforcing cage, 3, the entity pile body, 4, hollow body, 5, rig.6, vibro driver, 7, connector, 8, the drilling rod guide rod, 9, hollow body socket cap.
The specific embodiment
Below in conjunction with accompanying drawing and instantiation, the invention will be further described, but not as a limitation of the invention.
A kind of hollow bored pipe mainly is comprised of several parts such as reinforcing cage 2, entity pile body 3 and hollow bodies 4,
The size of hollow body 4, designing pile length (being not less than 30 meters) according to design drawing, deduct 10 meters according to 2/3 designing pile length, and external diameter is done for design stake footpath (being not less than 2.0 meters) deducts 1.0 metric systems, material can adopt polymer fiber or HPDE material, by producer's customization, is formed.The position of hollow body 4 in pile body, determine according to Fig. 2 schematic diagram.
At first according to the boring of existing mature technology, through clear hole once, reinforcing cage 2 is installed after pore-forming, then according to existing technique, build pile concrete and measure and predetermined elevation to the side of calculatinging;
It is as follows that next hollow body presses down installation steps:
The first step: first with the lifting tap of rig 5 lifting hollow body 4 own, put in place and locate temporarily;
Second step: with the drill's lifting tap, hang peace vibro driver 6;
The 3rd step: connect first segment drilling rod guide rod 8 in pile driver 6 bottoms with connector 7, hollow body suit cap 9 is installed in drilling rod guide rod 8 bottoms;
The 4th step: first with the deadweight of vibro driver 6, press down hollow body 4;
The 5th step: when hollow body 4 leans on when weight is not gone down, start vibro driver 6 vibrations and press down hollow body, when first segment drilling rod guide rod 8 presses to drilling machine platform, promote vibro driver 6, second section drilling rod guide rod 8 is installed, then continue vibration and press down, so loop, until hollow body 4 is transferred to design attitude;
The 6th step: after hollow body 4 is depressed into design attitude, stop vibration, voltage stabilizing 10 minutes, to on drilling rod guide rod 8, carry 20cm, observe hollow body 4 whether float (slight mobile if the hollow body floating can make the drilling rod guide rod upwards occur) in 2 minutes, if floating, press down hollow body 4 rear repetition voltage stabilizing operation again; After hollow body 4 position stabilities, remove section by section drilling rod guide rod 8, then remove first segment drilling rod guide rod and hollow body suit cap 9, finally remove vibro driver 6.
By the time after hollow body 4 installations, with the lining rope repetition measurement, the later stake top concrete surface elevation of hollow body 4 is installed, after meeting standard and designing requirement, mobile drill 5 is proceeded pile foundation construction to position, next hole.
The concrete of pile body should be selected efficient slow setting underwater concrete, from the pile concrete perfusion, to hollow body 4, transfers the total time put in place, should be controlled at concrete initial set in the time.
Except the described technical characterictic of this manual, be the known technology of those skilled in the art.
Claims (8)
1. a hollow bored pipe, it is characterized in that: comprise the entity pile body with and interior reinforcing cage, it is characterized in that: be provided with hollow body in described entity pile body, the designing pile length of described entity pile body is not less than 30 meters, and the diameter of described entity pile body is not less than 2.0 meters; The length of described hollow body is that 2/3 designing pile length deducts 10 meters, and the hollow body end face is positioned at following 1/3 designing pile length of design of pile top absolute altitude and adds 5 meters.
2. hollow bored pipe according to claim 1, it is characterized in that: described hollow body diameter is less 1.0 meters than entity pile body diameter.
3. hollow bored pipe according to claim 1 and 2, is characterized in that: be conical bottom described hollow body.
4. hollow bored pipe according to claim 1 and 2, it is characterized in that: described hollow body is polymer fiber hollow body or HPDE hollow body.
5. the job practices of the arbitrary described hollow bored pipe of claim 1-4, is characterized in that, comprises the following steps:
At first holed, carried out hole clearly after pore-forming, reinforcing cage is installed, then built pile concrete to calculating side's amount and predetermined elevation;
Secondly press down installation at the pile concrete initial set capable hollow body that advances, concrete steps are:
The first step: the top that first with drill's lifting tap lifting hollow body, is positioned to pile concrete;
Second step: with the drill's lifting tap, hang the peace vibro driver;
The 3rd step: connect first segment drilling rod guide rod at the vibropiling motor spindle with connector, hollow body suit cap is installed in drilling rod guide rod bottom;
The 4th step: transfer vibro driver to hollow body suit cap and hollow body top and coincide, first with the deadweight of vibro driver, press down hollow body;
The 5th step: then start the vibropiling machine vibration and press down hollow body, when first segment drilling rod guide rod presses to drilling machine platform, promote vibro driver, second section drilling rod guide rod is installed, then continue vibration and press down, so loop, until hollow body is transferred to design attitude;
The 6th step: after hollow body is depressed into design attitude, vibro driver stops vibration; Then remove hollow body suit cap, respectively save drilling rod guide rod and vibro driver;
After last hollow body installation, with the lining rope repetition measurement, the later stake top concrete surface elevation of hollow body is installed, after meeting standard and designing requirement, mobile drill is proceeded pile foundation construction to position, next hole.
6. the job practices of hollow bored pipe according to claim 5, it is characterized in that, after described vibro driver stops vibration, voltage stabilizing 10 minutes, to on the drilling rod guide rod, carry 20cm, observe hollow body in 2 minutes and whether float, if floating presses down hollow body rear repetition voltage stabilizing operation again.
7. according to the job practices of claim 5 or 6 described hollow bored pipes, it is characterized in that, described pile concrete is efficient slow setting underwater concrete, and guarantees to start to transfer and be controlled at pile concrete the total time put in place in the initial setting time to hollow body from the pile concrete perfusion.
8. according to the job practices of claim 5 or 6 described hollow bored pipes, it is characterized in that, implant hollow body in pile concrete after, the stake top concrete elevation after the implantation hollow body exceeds and is not less than 0.5 meter than design altitude.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310315893.4A CN103422495B (en) | 2013-07-25 | 2013-07-25 | A kind of hollow bored pipe and construction method thereof |
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| CN201310315893.4A CN103422495B (en) | 2013-07-25 | 2013-07-25 | A kind of hollow bored pipe and construction method thereof |
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| CN103422495B CN103422495B (en) | 2016-01-20 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104499480A (en) * | 2014-12-12 | 2015-04-08 | 董相东 | Method for drilling and filling concrete hollow pile |
| CN104895053A (en) * | 2015-06-16 | 2015-09-09 | 苏交科集团股份有限公司 | Construction method of sectional type cavity grouting pile |
| CN105040685A (en) * | 2015-06-09 | 2015-11-11 | 周兆弟 | Prefabricated member with hollow structure |
| CN106759300A (en) * | 2016-11-25 | 2017-05-31 | 淮阴工学院 | Using the root key construction method of the root key constructing device of radical bored concrete pile |
| CN108775010A (en) * | 2018-05-29 | 2018-11-09 | 河海大学 | A kind of PCC energy stake and its construction method |
| CN111335347A (en) * | 2020-03-12 | 2020-06-26 | 广东金衡建筑工程有限公司 | Cast-in-situ bored pile and construction method thereof |
| WO2023098672A1 (en) * | 2021-12-03 | 2023-06-08 | 中交第二航务工程勘察设计院有限公司 | Gas bag type bored hollow pile structure and construction method therefor |
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| JPH073782A (en) * | 1993-06-18 | 1995-01-06 | Kajima Corp | Method for constructing cast-in-place hollow concrete pile, and cast-in-place concrete pile |
| CN1186141A (en) * | 1997-12-25 | 1998-07-01 | 叶长生 | Bored concrete piles and its construction |
| CN2353795Y (en) * | 1999-01-13 | 1999-12-15 | 中国建筑科学研究院地基基础研究所 | Prefabricated-tube composite pile of cement and soil |
| CN2370065Y (en) * | 1998-09-21 | 2000-03-22 | 叶长生 | Hydraulic hammered hollow prefabricated pile |
| CN2729150Y (en) * | 2004-09-15 | 2005-09-28 | 蔡崇晓 | Concrete placed hollow pile |
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2013
- 2013-07-25 CN CN201310315893.4A patent/CN103422495B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH073782A (en) * | 1993-06-18 | 1995-01-06 | Kajima Corp | Method for constructing cast-in-place hollow concrete pile, and cast-in-place concrete pile |
| CN1186141A (en) * | 1997-12-25 | 1998-07-01 | 叶长生 | Bored concrete piles and its construction |
| CN2370065Y (en) * | 1998-09-21 | 2000-03-22 | 叶长生 | Hydraulic hammered hollow prefabricated pile |
| CN2353795Y (en) * | 1999-01-13 | 1999-12-15 | 中国建筑科学研究院地基基础研究所 | Prefabricated-tube composite pile of cement and soil |
| CN2729150Y (en) * | 2004-09-15 | 2005-09-28 | 蔡崇晓 | Concrete placed hollow pile |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104499480A (en) * | 2014-12-12 | 2015-04-08 | 董相东 | Method for drilling and filling concrete hollow pile |
| CN105040685A (en) * | 2015-06-09 | 2015-11-11 | 周兆弟 | Prefabricated member with hollow structure |
| CN104895053A (en) * | 2015-06-16 | 2015-09-09 | 苏交科集团股份有限公司 | Construction method of sectional type cavity grouting pile |
| CN106759300A (en) * | 2016-11-25 | 2017-05-31 | 淮阴工学院 | Using the root key construction method of the root key constructing device of radical bored concrete pile |
| CN108775010A (en) * | 2018-05-29 | 2018-11-09 | 河海大学 | A kind of PCC energy stake and its construction method |
| CN111335347A (en) * | 2020-03-12 | 2020-06-26 | 广东金衡建筑工程有限公司 | Cast-in-situ bored pile and construction method thereof |
| WO2023098672A1 (en) * | 2021-12-03 | 2023-06-08 | 中交第二航务工程勘察设计院有限公司 | Gas bag type bored hollow pile structure and construction method therefor |
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| CN103422495B (en) | 2016-01-20 |
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Inventor after: Chen Qiang Inventor before: Wang Weikai Inventor before: Pan Xiangjun Inventor before: Xiao Changcai Inventor before: Li Lei Inventor before: Yan Shuhong |
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Effective date of registration: 20151124 Address after: 255000 Cao Nan village, four Baoshan office, hi tech Industrial Development Zone, Shandong, Zibo Applicant after: SHANDONG JIUQIANG ROAD & BRIDGE CO., LTD. Address before: 257091 Shandong city of Dongying province Dongying District Front Street No. 65 Applicant before: Keda Group Co., Ltd. |
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