CN102061699A - Reinforcing bar of bottom-reamed bored pile and construction method thereof - Google Patents
Reinforcing bar of bottom-reamed bored pile and construction method thereof Download PDFInfo
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- CN102061699A CN102061699A CN 201010571074 CN201010571074A CN102061699A CN 102061699 A CN102061699 A CN 102061699A CN 201010571074 CN201010571074 CN 201010571074 CN 201010571074 A CN201010571074 A CN 201010571074A CN 102061699 A CN102061699 A CN 102061699A
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Abstract
The invention provides a reinforcing bar of a bottom-reamed bored pile and a construction method thereof. The reinforcing bar comprises a large bar cage, a small bar cage, a slide fastener and a plurality of connecting bars, wherein the small bar cage is sleeved in the large bar cage, and the height of the small bar cage is smaller than that of the large bar cage; the slide fastener is arranged on the large bar cage; and the connecting bars are slidably penetrated in the slide fastener, the root parts of the connecting bars are fixed on the small bar cage, and the tail part of each connecting bar is provided with a lock pin of which the size is larger than that of the slide fastener. In the invention, when the large bar cage is lifted, the small bar cage downwards slides relative to the large bar cage, the connecting bars are taken back to the large bar cage, and the reinforcing bar can be conveniently moved to the hole bottom; after the reinforcing bar is moved to the hole bottom, the small bar cage goes up relative to the large bar cage, the connecting bars extend out relative to the large bar cage, thus the bottom diameter of the large bar cage is increased to achieve a bottom reaming effect; the small bar cage can also ensure that the reinforcing steel bar density of the pole bottom is increased, and the concrete strength of the pole bottom is also increased; and after concrete is poured, the shearing resistance and the bending resistance of the part of a reamed head of at the pole bottom can be greatly improved so as to greatly improve the vertical bearing capacity of the pile foundation.
Description
Technical field
The present invention relates to building field, especially a kind of job practices that is applicable to arrangement of reinforcement and this arrangement of reinforcement of underreamed bored pile.
Background technology
At present, what bored pile adopted in the highway bridge construction mainly is straight hole pile, and it equates in the aperture up and down, has supports, stablizes, the effect of consolidated subsoil.In order on the basis of existing straight hole pile, to increase the bearing capacity of stake, increase the steadiness of ground, by research and experiment, the engineer has proposed the underreamed bored pile technology.
So-called underreamed bored pile, be to the predetermined degree of depth the stake hole drill that forms by the equal diameter boring method, after changing reaming bit, the reaming blade that struts drill bit makes it at the bottom of the expanded hole of rotary cutting stratum, put into arrangement of reinforcement (reinforcing cage) behind the pore-forming, concrete perfusion forms expanded bore pile to obtain the job practices of big vertical bearing capacity.The key of its method is to expand the end and stake end arrangement of reinforcement, and the job practices of reaming is now ripe, but stake end arrangement of reinforcement does not still have maturation process at present.
Summary of the invention
Technical problem to be solved by this invention provides a kind of arrangement of reinforcement that is specially adapted for underreamed bored pile.
The arrangement of reinforcement that is applicable to underreamed bored pile proposed by the invention comprises: big muscle cage; Be set in the described big muscle cage and height less than the little muscle cage of big muscle cage; Be arranged on the slide fastener on the big muscle cage; Many dowels, described dowel slides and is located in the described slide fastener, and the root of dowel is fixed on the little muscle cage, portion is provided with the lock pin of size greater than described slide fastener size slightly.
Another technical problem to be solved by this invention provides the job practices of above-mentioned arrangement of reinforcement.
Job practices proposed by the invention may further comprise the steps: (a) big muscle cage puted forth effort and mentioned arrangement of reinforcement, and the downward landing of the big relatively muscle cage of then little muscle cage, dowel slides in slide fastener, and dowel is regained big muscle cage; To maximum displacement, dowel is all regained big muscle cage until the downward landing of the big relatively muscle cage of little muscle cage, and lock pin is resisted against on the slide fastener; (b) mobile arrangement of reinforcement is to the hole of castinplace pile; (c) put down arrangement of reinforcement, in the time of at the bottom of the bottom of little muscle cage arrives the hole, the big relatively muscle cage of little muscle cage rises, and little muscle cage is got back in the big muscle cage once more, and dowel slides in slide fastener, and the big relatively muscle cage of dowel stretches out; (d) big muscle cage arrives at the bottom of the hole, and the big relatively muscle cage of dowel this moment stretches out maximum displacement.
This arrangement of reinforcement that the present invention proposes, when mentioning big muscle cage, the big relatively muscle cage of little muscle cage glides, dowel is regained big muscle cage, can mobile easily arrangement of reinforcement at the bottom of the hole, thereby guaranteed the exploitativeness of scheme; After moving at the bottom of the hole, the big relatively muscle cage of little muscle cage rises, the big relatively muscle cage of dowel stretches out, make the diameter of big muscle cage bottom increase, reach the effect that expands the end, and the reinforcing bar density of the existence of little muscle cage at the bottom of also can making increases, stake base concrete intensity also can increase, the shearing resistance and the bending resistance of enlarged footing part at the bottom of can significantly improving after the fluid concrete, thus the vertical bearing capacity of pile foundation greatly improved.
Description of drawings
By the more specifically explanation of the preferred embodiments of the present invention shown in the accompanying drawing, above-mentioned and other purpose, feature and advantage of the present invention will be more clear.Reference numeral identical in whole accompanying drawings is indicated identical part.Painstakingly do not draw accompanying drawing, focus on illustrating purport of the present invention by real size equal proportion convergent-divergent.
Fig. 1 is the stereogram of arrangement of reinforcement of the present invention;
Fig. 2 a to Fig. 2 d is the job practices schematic diagram of arrangement of reinforcement of the present invention.
The specific embodiment
Referring to Fig. 1, a kind of arrangement of reinforcement that is applicable to underreamed bored pile that the present invention proposes, it comprises with the lower part: big muscle cage 1; Be set in the big muscle cage 1 and height less than the little muscle cage 2 of big muscle cage 1; Be arranged on the slide fastener 10 on the big muscle cage 1; Many dowels 3, described dowel 3 slides and is located in the described slide fastener 10, and the root of dowel 3 is fixed on the little muscle cage 2, portion is provided with the lock pin 4 of size greater than described slide fastener 10 sizes slightly.For building field, the material of this arrangement of reinforcement is steel; The root of dowel 3 and little muscle cage 2 are fixing for welding.
Described big muscle cage 1 is cylindrical, height and the matched of whole boring (height that all show big muscle cage 1 among Fig. 1), and the middle part of diameter and boring and top diameter mate; Described little muscle cage 2 also is cylindrical, and height and the matched that expands the end, the diameter of little muscle cage 2 add the length of two dowels 3 and the diameter coupling of reaming.In the present embodiment, the diameter of big muscle cage 1 is 800mm, and the diameter of little muscle cage 2 is 500mm, and the length of dowel 3 is 500mm, and the diameter of little muscle cage 2 adds that the length of two dowels 3 is 1500mm.
Described dowel 3 forms round around little muscle cage 2, and in the present embodiment, dowel 3 has two-layer, promptly two encloses, and a circle is positioned at the end face of little muscle cage 2, and another circle is positioned at the middle part of little muscle cage 2 and is 400mm with little muscle cage 2 bottom surfaces distance.Accordingly, big muscle cage 1 is provided with two-layer slide fastener 10.
Described lock pin 4 is crosswise, its generation type is the cross bar 30 that bearing of trend is vertical with dowel 3 bearing of trends of the welding of portion slightly at dowel 3, the portion slightly of described dowel 3 also in the plane inner bending vertical with described cross bar 30, prevents that the portion slightly of dowel 3 from coming off thus from slide fastener 10 on three directions (direction that both direction that cross bar 30 provides and the dowel of bending 3 tapers provide).
The job practices of above-mentioned arrangement of reinforcement can be referring to Fig. 2 a to Fig. 2 d.More clear in order to express, in Fig. 2 a to Fig. 2 d, reinforcement structure shown in Figure 1 is simplified, 3 quantity of the dowel among Fig. 1 are reduced.
Before carrying out the arrangement of reinforcement construction, need carry out smooth place, slurrying, bury casing underground, lay conventional construction sequences such as working platform, rigging up and location, drilling and forming hole, expansion bottom outlet.
Carrying out arrangement of reinforcement when construction, at first,, big muscle cage 1 is being puted forth effort and mentioned arrangement of reinforcement referring to Fig. 2 a.At this moment little muscle cage 2 is owing to be subjected to action of gravity, and with big relatively muscle cage 1 downward landing, dowel 3 slides in slide fastener 10, and dowel 3 is regained big muscle cage 1 (dotted line represents that the circle that the portion slightly of dowel 3 forms dwindles gradually among Fig. 2 a); Until Fig. 2 b, the big relatively muscle cage 1 downward landing of little muscle cage 2 is to maximum displacement, and dowel 3 is all regained big muscle cage 1, thereby lock pin 4 is resisted against and limits little muscle cage 2 on the slide fastener 10 and can not break away from big muscle cage 1, this moment little muscle cage 2 with big muscle cage 1 same moved further.
Referring to Fig. 2 b, mobile arrangement of reinforcement is to the hole.Can easily lift and put into hole because dowel 3 is all regained big muscle cage 1, and the outer ring size of whole arrangement of reinforcement is the size of big muscle cage 1 this moment, and the existence of dowel 3 can not produce any obstruction to lifting.
Referring to Fig. 2 c, put down arrangement of reinforcement.When putting down big muscle cage 1, because the big relatively muscle cage 1 downward landing of little muscle cage 2, the bottom of then little muscle cage 2 can arrive earlier at the bottom of the hole, be subjected to this moment hindering at the bottom of the hole, the big relatively muscle cage 1 of little muscle cage 2 rises, little muscle cage 2 is got back in the big muscle cage 1 once more, and dowel 3 slides in slide fastener 10, and the big relatively muscle cage 1 of dowel 3 stretches out (dotted line represents that the circle that the portion slightly of dowel 3 forms increases gradually among Fig. 2 c).
Referring to Fig. 2 d, big muscle cage 1 arrives at the bottom of the hole.The big relatively muscle cage 1 of dowel 3 this moment stretches out maximum displacement.
Carry out the technology of fluid concrete afterwards again,, make the enlarged-diameter of arrangement of reinforcement bottom because the big relatively muscle cage 1 of dowel 3 stretches out, reach the effect that expands the end, and because the existence of little muscle cage 2, the reinforcing bar density at the bottom of can making increases, and a stake bottom concrete strength also can increase.
In order to verify the effect of present embodiment, the inventor has carried out control experiment.Adopt conventional job practices to pour into a mould the concrete pile of three piles footpath 800mm, long 32m, after 28 days, the ultimate bearing capacity that adopts approximating method to obtain stake is respectively 4634kN, 4685kN and 4715kN.Adopt the arrangement of reinforcement cast stake footpath 800mm of conventional job practices and present embodiment, the enlarged base concrete stake of end 1500mm, long 32m, after 28 days, the ultimate bearing capacity that adopts approximating method to obtain stake is 5983kN, than the ultimate bearing capacity raising 30% of conventional stake.
Though the present invention with preferred embodiment openly as above; but it is not to be used for limiting claim; any those skilled in the art without departing from the spirit and scope of the present invention; can make possible change and modification, so protection scope of the present invention should be as the criterion with the scope that claim of the present invention was defined.
Claims (9)
1. the arrangement of reinforcement of a underreamed bored pile is characterized in that, comprising: big muscle cage; Be set in the described big muscle cage and height less than the little muscle cage of big muscle cage; Be arranged on the slide fastener on the big muscle cage; Many dowels, described dowel slides and is located in the described slide fastener, and the root of dowel is fixed on the little muscle cage, portion is provided with the lock pin of size greater than described slide fastener size slightly.
2. arrangement of reinforcement as claimed in claim 1 is characterized in that, the material of this arrangement of reinforcement is a steel.
3. arrangement of reinforcement as claimed in claim 1 is characterized in that, the root of described dowel and the welding of little muscle cage are fixing.
4. arrangement of reinforcement as claimed in claim 1 is characterized in that, described big muscle cage and little muscle cage are cylindrical.
5. arrangement of reinforcement as claimed in claim 4 is characterized in that, described dowel forms round around little muscle cage.
6. arrangement of reinforcement as claimed in claim 5 is characterized in that, described dowel forms two circles.
7. arrangement of reinforcement as claimed in claim 1 is characterized in that, the portion slightly of described dowel is welded with the bearing of trend cross bar vertical with the dowel bearing of trend, and described lock pin is crosswise.
8. arrangement of reinforcement as claimed in claim 7 is characterized in that, the portion slightly of described dowel is also in the plane inner bending vertical with described cross bar.
9. the job practices of an arrangement of reinforcement as claimed in claim 1 is characterized in that comprising the steps:
(a) big muscle cage is puted forth effort and mentioned arrangement of reinforcement, the downward landing of the big relatively muscle cage of then little muscle cage, dowel slides in slide fastener, and dowel is regained big muscle cage; To maximum displacement, dowel is all regained big muscle cage until the downward landing of the big relatively muscle cage of little muscle cage, and lock pin is resisted against on the slide fastener;
(b) mobile arrangement of reinforcement is to the hole of castinplace pile;
(c) put down arrangement of reinforcement, in the time of at the bottom of the bottom of little muscle cage arrives the hole, the big relatively muscle cage of little muscle cage rises, and little muscle cage is got back in the big muscle cage once more, and dowel slides in slide fastener, and the big relatively muscle cage of dowel stretches out;
(d) big muscle cage arrives at the bottom of the hole, and the big relatively muscle cage of dowel this moment stretches out maximum displacement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105710742A CN102061699B (en) | 2010-12-02 | 2010-12-02 | Reinforcing bar of bottom-reamed bored pile and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105710742A CN102061699B (en) | 2010-12-02 | 2010-12-02 | Reinforcing bar of bottom-reamed bored pile and construction method thereof |
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| CN102061699A true CN102061699A (en) | 2011-05-18 |
| CN102061699B CN102061699B (en) | 2012-05-30 |
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| CN2010105710742A Expired - Fee Related CN102061699B (en) | 2010-12-02 | 2010-12-02 | Reinforcing bar of bottom-reamed bored pile and construction method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106087988A (en) * | 2016-08-12 | 2016-11-09 | 中国地质大学（武汉） | A kind of rotation expansion formula steel reinforcement cage |
| CN106087985A (en) * | 2016-08-12 | 2016-11-09 | 中国地质大学（武汉） | A kind of extended position double steel bar cage |
| CN106087987A (en) * | 2016-08-12 | 2016-11-09 | 中国地质大学（武汉） | A kind of expansion steel reinforcement cage |
| CN106400787A (en) * | 2016-08-12 | 2017-02-15 | 武汉志和岩土工程有限公司 | Construction method for manufacturing cast-in-place pile through unfolded type dual-layer reinforcement cage |
| CN106400783A (en) * | 2016-08-12 | 2017-02-15 | 武汉志和岩土工程有限公司 | Construction method for manufacturing cast-in-place pile through unfolded type reinforcement cage |
| CN110344397A (en) * | 2019-07-05 | 2019-10-18 | 深圳宏业基岩土科技股份有限公司 | The reinforcement cage structure of boring and expanding bottom pile |
| CN111335366A (en) * | 2020-03-14 | 2020-06-26 | 何艳 | Method for arranging anti-pulling ring platform steel reinforcement cage in anti-pulling ring groove |
| CN111335365A (en) * | 2020-03-14 | 2020-06-26 | 何艳 | Anti-pulling ring platform steel reinforcement cage device on cylindrical anti-pulling pile steel reinforcement cage |
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| JP2005146577A (en) * | 2003-11-12 | 2005-06-09 | Yoshikazu Hara | Reinforcing cage for foundation pile, and method of reinforcement arrangement for enlarging enlarged bottom part |
| CN200964587Y (en) * | 2006-10-31 | 2007-10-24 | 陈宁华 | Sinking pipe perfusion bottom-expanding pile |
| US20080019779A1 (en) * | 2006-07-21 | 2008-01-24 | Henderson Joy K | Steel-Cased Concrete Piers |
| CN201062358Y (en) * | 2007-07-23 | 2008-05-21 | 安蓉建设总公司 | Reinforcement cage for end oversized grout pile |
| CN201074324Y (en) * | 2007-07-12 | 2008-06-18 | 王国奋 | High-rise building club-footed pile |
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2010
- 2010-12-02 CN CN2010105710742A patent/CN102061699B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005146577A (en) * | 2003-11-12 | 2005-06-09 | Yoshikazu Hara | Reinforcing cage for foundation pile, and method of reinforcement arrangement for enlarging enlarged bottom part |
| US20080019779A1 (en) * | 2006-07-21 | 2008-01-24 | Henderson Joy K | Steel-Cased Concrete Piers |
| CN200964587Y (en) * | 2006-10-31 | 2007-10-24 | 陈宁华 | Sinking pipe perfusion bottom-expanding pile |
| CN201074324Y (en) * | 2007-07-12 | 2008-06-18 | 王国奋 | High-rise building club-footed pile |
| CN201062358Y (en) * | 2007-07-23 | 2008-05-21 | 安蓉建设总公司 | Reinforcement cage for end oversized grout pile |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106087988A (en) * | 2016-08-12 | 2016-11-09 | 中国地质大学（武汉） | A kind of rotation expansion formula steel reinforcement cage |
| CN106087985A (en) * | 2016-08-12 | 2016-11-09 | 中国地质大学（武汉） | A kind of extended position double steel bar cage |
| CN106087987A (en) * | 2016-08-12 | 2016-11-09 | 中国地质大学（武汉） | A kind of expansion steel reinforcement cage |
| CN106400787A (en) * | 2016-08-12 | 2017-02-15 | 武汉志和岩土工程有限公司 | Construction method for manufacturing cast-in-place pile through unfolded type dual-layer reinforcement cage |
| CN106400783A (en) * | 2016-08-12 | 2017-02-15 | 武汉志和岩土工程有限公司 | Construction method for manufacturing cast-in-place pile through unfolded type reinforcement cage |
| CN106400783B (en) * | 2016-08-12 | 2018-07-03 | 武汉志和岩土工程有限公司 | The construction method of bored concrete pile is made of expansion steel reinforcement cage |
| CN106400787B (en) * | 2016-08-12 | 2018-07-06 | 武汉志和岩土工程有限公司 | The construction method of bored concrete pile is made of extended position double steel bar cage |
| CN110344397A (en) * | 2019-07-05 | 2019-10-18 | 深圳宏业基岩土科技股份有限公司 | The reinforcement cage structure of boring and expanding bottom pile |
| CN111335366A (en) * | 2020-03-14 | 2020-06-26 | 何艳 | Method for arranging anti-pulling ring platform steel reinforcement cage in anti-pulling ring groove |
| CN111335365A (en) * | 2020-03-14 | 2020-06-26 | 何艳 | Anti-pulling ring platform steel reinforcement cage device on cylindrical anti-pulling pile steel reinforcement cage |
| CN111335365B (en) * | 2020-03-14 | 2021-06-01 | 浙江新华建设有限公司 | Anti-pulling ring platform steel reinforcement cage device on cylindrical anti-pulling pile steel reinforcement cage |
| CN111335366B (en) * | 2020-03-14 | 2021-07-02 | 南通居者安建筑科学研究院有限公司 | Method for arranging anti-pulling ring platform steel reinforcement cage in anti-pulling ring groove |
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| CN102061699B (en) | 2012-05-30 |
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Granted publication date: 20120530 Termination date: 20121202 |