CN104074184A - Pile base post-grouted expanded-base bored pile - Google Patents
Pile base post-grouted expanded-base bored pile Download PDFInfo
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- CN104074184A CN104074184A CN201410211022.2A CN201410211022A CN104074184A CN 104074184 A CN104074184 A CN 104074184A CN 201410211022 A CN201410211022 A CN 201410211022A CN 104074184 A CN104074184 A CN 104074184A
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Abstract
The invention discloses a pile base post-grouted expanded-base bored pile. The pile base post-grouted expanded-base bored pile is characterized in that the expanded base is formed to be a basin-shaped base or an arc base, and a construction process for the expanded base is realized by a sheath tube, a grouting tube, a reinforcement cage, a rotary drilling rig, a special rotary drilling bucket and a crane; and the procedures are as follows: step 1, the rotary drilling pile hole construction of the rotary drilling rig; step 2, the expanded-base construction of the special rotary drilling bucket; step 3, the auxiliary construction of the crane; step 4, the post-grouting construction of the pile base. The pile base post-grouted expanded-base bored pile disclosed by the invention has the advantages that a bearing force value is greatly increased, a zero-discharge environment protection technology for mud is realized, and a standby rate during construction is zero, thus the construction efficiency is extremely high, and then the engineering cost is remarkably reduced.
Description
Technical field
The present invention relates to a kind of pile foundation of civil construction project, especially relate to a kind of rotary drilling rig that adopts a hole, expand the end rotary spading machine digging machine, put reinforcing cage and the loop wheel machine of filling with concrete by the basin shape of the pile bottom post-grouting of construction flow process at the bottom of bottom-enlarging filling pile.
Background technology
In Chinese invention patent ZL200410037804.5 < < expanded bore pile and construction method > > thereof, the end of disclosed this expanded bore pile is flat-bottom structure, and the counter-force of foundation soil is the inhomogeneous arcs of recesses that is, the foundation soil counter-force of dual side-edge is maximum, and middle foundation soil counter-force is minimum, the soil layer that the end of dividing bottom expanding and straight flange intersection point place are foundation soil counter-force maximum easily produces stress and concentrates and the plastic hinge of appearance, increase along with load, the plastic hinge of angle point is also thereupon to expansion in the middle of at the bottom of stake, thereby the native end resistance of stake end is reduced.
Again, the construction sequence of existing bottom-enlarging filling pile is that pile job execution is all fixed on the follow procedure construction of same stake position, be that rotary drilling rig has been constructed behind a hole, must change shovel digging machine and expand the end, expand after the end completes, must apply again a machine or loop wheel machine and hang in reinforcing cage in stake hole, hang in steel conduit and installation, underwater concrete pouring, steel conduit and dismantle, cement out slurry coat method and be recovered into container etc. and all complete and must expend a large amount of man-hours, because only have a machine in work in stake hole, other is standby.
For example: diameter is the long 50m of stake of the bottom-enlarging filling pile in 800 millimeters of stake footpaths, rotary drilling rig completes a hole palpus 10 hours, rotary spading machine digging machine complete expand the end must 2.5 hours, loop wheel machine completes that reinforcing cage is placed, hang in steel conduit and installation, underwater concrete pouring, steel conduit dismounting in stake hole, cement out slurry coat method is recovered into container etc. and completes palpus 5 hours; For guaranteeing the equal running at full capacity of above-mentioned three machine, must configure four rotary drilling rigs, a rotary spading machine digging machine and two loop wheel machines, can eliminate holding state; So efficiency of construction is extremely low, construction cost is high.
Summary of the invention
Technical problem to be solved by this invention is to provide higher efficiency of construction and the pile bottom post-grouting bottom-enlarging filling pile that reduces engineering cost of can improving again of a kind of bearing capacity value.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of pile bottom post-grouting bottom-enlarging filling pile, is characterized in that, at the bottom of the described stake end is set to basin shape; Size at the bottom of this basin shape can realize by changing the shape of the rotary bucket of rotary spading machine digging machine; The geomery of the bottom-enlarging filling pile at the bottom of this basin shape is D/d≤2.5, b/h=1/4～1/2;
For sand b/h=1/4, α=14 °;
For silt, cohesive soil b/h=1/3～1/2, α=18.5 °～27 °;
In formula, D is described stake end diameter; D is described stake diameter;
B is D-d/2; H is described stake end height;
α is the angle between described stake end diameter and described stake diameter;
The described stake end, also can be set to circular arc bottom.
Construction sequence of the present invention is: comprise protecting pipe, Grouting Pipe and reinforcing cage, and rotary drilling rig, Special rotary dig scraper bowl, loop wheel machine;
Described in the first step, rotary drilling rig revolves and digs pile hole construction
1. the stake hole of design stake position suitable for reading, sink to described expansion sleeve pipe, adopt described rotary drilling rig to excavate dry ground, inject slurry coat method in stake hole, this mud can repeat to recycle simultaneously, and the pore-forming that completes stake proceeds to next position;
2. described rotary drilling rig is vertical at design stake bit correction, revolves and takes soil particle, the slush pump leaving in advance in slurry tank is sent in a hole simultaneously, and the described slurry coat method of anchor spike hole Inner wall, until at the bottom of design stake hole, described rotary drilling rig exits a hole;
Described in second step, Special rotary digs scraper bowl expansion bottom application work
1. it is in place that described Special rotary digs the scraper bowl machine described protecting pipe suitable for reading in stake hole, proofreaies and correct vertically, inserts to revolve and dig scraper bowl to the bottom in stake hole, proofreaies and correct vertically;
2. described in, revolve and dig scraper bowl and divide and will shovel mouth expansion for 4-6 time by the diameter of establishing juice and expand the end, revolve soil particle while digging and enter scraper bowl chamber by shoveling mouth, the described diameter that digs scraper bowl that revolves retracts to minimum state, stake hole described protecting pipe spoir particle suitable for reading is proposed, then time strengthen revolve the diameter that digs scraper bowl revolve take soil particle, described in revolve and dig Chan Dou Zhi Longitude retraction, revolve and dig scraper bowl and propose mouth of pipe spoir, until establish the diameter that juice expands the end, stop;
3. at stake hole Inner, insert supersonic reflectoscope, check stake hole Inner stake footpath, expand Bottom Shape and whether meet design requirement with diameter, maybe must study for a second time courses one has flunked, reach the examination data that qualified printing becomes, Special rotary digs scraper bowl and extracts the suitable for reading of described protecting pipe and exit;
Loop wheel machine auxiliary construction described in the 3rd step
1. reinforcing cage is by vertical reinforcement, stirrup and the two described Grouting Pipe described reinforcing cage that is welded, and this Grouting Pipe underseal mouth (this sealing can adopt bicycle tube cover), avoids mud to immerse, and by loop wheel machine, described reinforcing cage is hung in to a hole Inner;
2. adopt described loop wheel machine at reinforcing cage center, to place the conduit of filling with concrete, the end of conduit, is apart from the about 500mm of distance at the bottom of stake hole, by the concrete amount that pours into first of the height >=1m after bellout diameter concrete pouring, guarantee that concrete pouring rear tube inserts the degree of depth >=500mm in concrete, by Underwater Concrete Construction construction technology, comprise the rising of described concrete in a hole, the corresponding shortening of conduit, but must guarantee that conduit inserts the degree of depth >=500mm-2000mm in described concrete, avoid drilling slurry to immerse pile body concrete;
3. along with concrete pouring process in stake hole must reclaim the slurry coat method in a hole at any time, can not overflow contaminated site, reclaim mud and leave in iron case, use again after pending;
4. in stake hole concrete pouring complete after, i.e. after concrete final set, before gain in strength, in 24-72 hour, Grouting Pipe Inner opens plug with clear-water high-pressure pumping, the sealing puncturing at the bottom of described Grouting Pipe stops;
The 4th step pile bottom post-grouting construction
1. extract described protecting pipe;
2. the sediment in the cement paste reinforcing pile hole of injecting and bearing course at pile end soil.
Compared with prior art, the invention has the advantages that: first, the bearing capacity value of bottom-enlarging filling pile at the bottom of basin shape is increased substantially; Its two, adopt to revolve to take dry ground, inject the slurry coat method recycling, realize the zero-emission green technology of mud; Its three, in construction, treat that probability is zero, so efficiency of construction is high, thereby significantly reduces engineering cost.
Accompanying drawing explanation
Fig. 1 is geomery schematic diagram of the present invention;
Fig. 2 is structural representation of the present invention;
Fig. 3 is construction sequence schematic diagram of the present invention;
The specific embodiment
As shown in Figures 1 to 3, to adopt three machines be bottom-enlarging filling pile at the bottom of the basin shape of rotary drilling rig (being used to form a hole), rotary spading machine digging machine (be used to form and expand at the end), loop wheel machine (for settling reinforcing cage and the filling with concrete) pile bottom post-grouting of constructing by operation procedure flowing water in each hole to the present embodiment.
The present invention adopts the bottom-enlarging filling pile at the bottom of basin shape; Size at the bottom of this basin shape can realize by changing the shape of the rotary bucket of rotary spading machine digging machine;
Fig. 1 is the geomery of the bottom-enlarging filling pile at the bottom of basin shape, and its size is set to
D/d≤2.5，b/h＝1/4～1/2；
For sand b/h=1/4, α=14 °;
For silt, cohesive soil b/h=1/3～1/2, α=18.5 °～27 °;
In formula, D is described stake end diameter; D is described stake diameter;
B is D-d/2; H is described stake end height;
α is the angle between described stake end diameter and described stake diameter;
The bottom-enlarging filling pile of the present embodiment also can adopt circular arc bottom; This circular arc bottom is identical with the counter-force of foundation soil at the bottom of described basin shape, for ease of revolving to dig, expands bottom application work, most basin shape Bottom Shape sizes that adopt.
Construction sequence of the present invention is (shown in Figure 3):
First step rotary drilling rig revolves and digs pile hole construction
1. at the protecting pipe 1 that sinks to suitable for reading that designs the stake hole of stake position; Adopt rotary drilling rig to excavate dry ground, inject slurry coat method 2 in stake hole, the pore-forming that completes stake proceeds to next position simultaneously;
2. rotary drilling rig is vertical at design stake bit correction, revolves and takes soil particle, the slush pump leaving in advance in slurry tank is sent in a hole simultaneously, and the slurry coat method 2 of anchor spike hole Inner wall, until at the bottom of design stake hole, rotary drilling rig exits a hole;
Second step Special rotary digs scraper bowl and expands bottom application work
1. Special rotary dig scraper bowl machine in stake hole protecting pipe 1 suitable for reading in place, proofread and correct vertically, insert to revolve and dig scraper bowl to the bottom in stake hole, proofread and correct vertical;
2. revolve and dig scraper bowl and divide and will shovel mouth expansion for 4-6 time by the diameter of establishing juice and expand the end, revolve soil particle while digging and enter scraper bowl chamber by shoveling mouth, revolve the diameter that digs scraper bowl and retract to minimum state, stake hole protecting pipe 1 spoir particle suitable for reading is proposed, then time strengthen and revolve the diameter that digs scraper bowl and revolve and take soil particle, revolve and dig Chan Dou Zhi Longitude retraction, revolve and dig scraper bowl and propose mouth of pipe spoir, until establish the diameter that juice expands the end, stop;
3. at stake hole Inner, insert supersonic reflectoscope, check stake hole Inner stake footpath, expand Bottom Shape and whether meet design requirement with diameter, maybe must study for a second time courses one has flunked, reach the examination data that qualified printing becomes, Special rotary digs scraper bowl and extracts the suitable for reading of protecting pipe 1 and exit;
The 3rd step loop wheel machine auxiliary construction
1. reinforcing cage is by vertical reinforcement, stirrup and two Grouting Pipe 3 reinforcing cage 4 that is welded, and Grouting Pipe underseal mouth (this sealing can adopt bicycle tube cover), avoids mud to immerse, and by loop wheel machine, reinforcing cage 4 is hung in to a hole Inner;
2. by loop wheel machine, aid in reinforcing cage center and place the conduit of filling with concrete, the end of conduit, is apart from the about 500mm of distance at the bottom of stake hole, by the concrete amount that pours into first of the height >=1m after bellout diameter concrete pouring, guarantee that concrete pouring rear tube inserts the interior degree of depth >=500mm of concrete 5, press Underwater Concrete Construction construction technology, comprise the rising of concrete 5 in a hole, the corresponding shortening of conduit, but must guarantee that conduit inserts the degree of depth >=500mm-2000mm in concrete 5, avoid drilling slurry to immerse pile body concrete;
3. along with concrete pouring process in stake hole must reclaim the slurry coat method in a hole at any time, can not overflow contaminated site, reclaim mud and leave in iron case, use again after pending;
4. in stake hole in the complete later 24-72 of concrete pouring hour, at Grouting Pipe 2 Inner, with clear water 6 high pressure pumpings, open plug, puncture to starch and manage the sealing at 2 ends and stop;
The 4th step pile bottom post-grouting construction
1. extract protecting pipe 1;
2. the sediment in the cement paste 7 reinforcing pile holes of injecting and bearing course at pile end soil.
Grouting Pipe clear water is opened after plug because of the own final set of stake concrete, does not have the phenomenon of plugging, can wait and run up to construction in the time of can constructing by continuous grouting.
Remarkable result of the present invention is that bearing capacity value is increased substantially; Adopt to revolve again to take dry ground, inject the slurry coat method recycling, realize the zero-emission green technology of mud; Formation of pile shows the detection of stake footpath and bellout diameter, can automatically record and put on record if desired.
It is rotary drilling rig, rotary spading machine digging machine, loop wheel machine that the embodiment of the present invention adopts above-mentioned three machines, in different stakes hole at the bottom of the basin shape of follow procedure flowing water construction in bottom-enlarging filling pile, this rotary drilling rig completes a hole in A stake position can proceed to B stake position, completes B stake and can proceed to C stake position; Rotary spading machine digging machine completes in A stake position and expands the end, proceeds to B stake position, completes to expand the end and proceed to C stake position in B stake position; Loop wheel machine completes foregoing in A stake position and proceeds to B stake position, completes foregoing proceed to C stake position in B stake position; Therefore the probability for the treatment of in above-mentioned three machine constructions is 0%, thereby efficiency of construction is high, can significantly reduce engineering cost again.
Claims (3)
1. a pile bottom post-grouting bottom-enlarging filling pile, is characterized in that, described castinplace pile expands at the bottom of the end is set to basin shape; The geomery of this bottom-enlarging filling pile is D/d≤2.5, b/h=1/4～1/2;
For sand b/h=1/4, α=14 °;
For silt, cohesive soil b/h=1/3～1/2, α=18.5 °～27 °;
In formula, D is described stake end diameter; D is described stake diameter;
B is D-d/2; H is described stake end height;
α is the angle between described stake end diameter and described stake diameter.
2. bottom-enlarging filling pile at the bottom of the basin shape of pile bottom post-grouting according to claim 1, is characterized in that, described castinplace pile expands the end and is set to circular arc bottom.
3. at the bottom of the basin shape of pile bottom post-grouting, the construction sequence of bottom-enlarging filling pile is: comprise protecting pipe, Grouting Pipe and a reinforcing cage, and rotary drilling rig, Special rotary dig scraper bowl, loop wheel machine;
Described in the first step, rotary drilling rig revolves and digs pile hole construction
1. at the described protecting pipe (1) that sinks to suitable for reading that designs the stake hole of stake position; Adopt described rotary drilling rig to excavate dry ground, inject slurry coat method in stake hole, the pore-forming that completes stake proceeds to next position simultaneously;
2. described rotary drilling rig is vertical at design stake bit correction, revolves and takes soil particle, the slush pump leaving in advance in slurry tank is sent in a hole simultaneously, and the described slurry coat method of anchor spike hole Inner wall, until at the bottom of design stake hole, described rotary drilling rig exits a hole;
Described in second step, Special rotary digs scraper bowl expansion bottom application work
1. described Special rotary dig scraper bowl machine in stake hole described protecting pipe suitable for reading in place, proofread and correct vertically, insert to revolve and dig scraper bowl to the bottom in stake hole, proofread and correct vertical;
2. described in, revolve and dig scraper bowl and divide and will shovel mouth expansion for 4-6 time by the diameter of establishing juice and expand the end, revolve soil particle while digging and enter scraper bowl chamber by shoveling mouth, the described diameter that digs scraper bowl that revolves retracts to minimum state, stake hole described protecting pipe spoir particle suitable for reading is proposed, then time strengthen revolve the diameter that digs scraper bowl revolve take soil particle, described in revolve and dig Chan Dou Zhi Longitude retraction, revolve and dig scraper bowl and propose mouth of pipe spoir, until establish the diameter that juice expands the end, stop;
3. at stake hole Inner, insert supersonic reflectoscope, check stake hole Inner stake footpath, expand Bottom Shape and whether meet design requirement with diameter, maybe must study for a second time courses one has flunked, reach the examination data that qualified printing becomes, described Special rotary digs scraper bowl and extracts the suitable for reading of described protecting pipe and exit;
Loop wheel machine auxiliary construction described in the 3rd step
1. reinforcing cage is by vertical reinforcement, stirrup and two described Grouting Pipe (3) the described reinforcing cage (4) that is welded, this Grouting Pipe underseal mouth (this sealing can adopt bicycle tube cover), avoid mud to immerse, by loop wheel machine, described reinforcing cage is hung in to a hole Inner;
2. by described loop wheel machine, aid in reinforcing cage center and place the conduit of filling with concrete, the end of conduit, is apart from the about 500mm of distance at the bottom of stake hole, by the concrete amount that pours into first of the height >=1m after bellout diameter concrete pouring, guarantee that concrete pouring rear tube inserts the interior degree of depth >=500mm of concrete (5), by Underwater Concrete Construction construction technology, comprise the rising of described concrete in a hole, the corresponding shortening of conduit, but must guarantee that conduit inserts the degree of depth >=500mm-2000mm in described concrete, avoid drilling slurry to immerse pile body concrete;
3. along with concrete pouring process in stake hole must reclaim the slurry coat method in a hole at any time, can not overflow contaminated site, reclaim mud and leave in iron case, use again after pending;
4. in stake hole, the complete later 24-72 of a concrete pouring hour inherent Grouting Pipe Inner opens plug with clear-water high-pressure pumping, and the sealing puncturing at the bottom of described Grouting Pipe stops;
The 4th step pile bottom post-grouting construction
1. extract described expansion sleeve pipe;
2. pile bottom post-grouting construction is pile after the sediment in the cement paste reinforcing pile hole of injection and bearing course at pile end soil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410211022.2A CN104074184B (en) | 2014-05-07 | 2014-05-07 | Pile base post-grouted expanded-base bored pile |
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| CN201410211022.2A CN104074184B (en) | 2014-05-07 | 2014-05-07 | Pile base post-grouted expanded-base bored pile |
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| CN104074184B CN104074184B (en) | 2017-01-25 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104988907A (en) * | 2015-08-02 | 2015-10-21 | 王继忠 | Construction method of concrete pile |
| CN109853529A (en) * | 2017-09-26 | 2019-06-07 | 冷伟 | Construction techniques |
| CN112922586A (en) * | 2021-02-24 | 2021-06-08 | 武汉长盛工程检测技术开发有限公司 | Single-line inertial navigation type dry-wet hole forming quality detection device and method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111305194B (en) * | 2019-11-29 | 2022-03-11 | 祝波 | Composite expanded disc pile construction method and equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293290A (en) * | 2000-11-10 | 2001-05-02 | 李珠 | Technology for forming pile by under-reaming and grouting |
| CN1492110A (en) * | 2002-09-13 | 2004-04-28 | 郑鸿彰 | Design and construction method of novel man-hole pile |
| KR20110006604A (en) * | 2009-07-14 | 2011-01-20 | 최영준 | Spacer with injection nozzles |
| CN102071679A (en) * | 2010-12-29 | 2011-05-25 | 西安建筑科技大学 | Method for consolidating existing building foundation |
| CN203808057U (en) * | 2014-05-07 | 2014-09-03 | 孔超 | Pile bottom rear grouting cast-in-place belled pile |
-
2014
- 2014-05-07 CN CN201410211022.2A patent/CN104074184B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293290A (en) * | 2000-11-10 | 2001-05-02 | 李珠 | Technology for forming pile by under-reaming and grouting |
| CN1492110A (en) * | 2002-09-13 | 2004-04-28 | 郑鸿彰 | Design and construction method of novel man-hole pile |
| KR20110006604A (en) * | 2009-07-14 | 2011-01-20 | 최영준 | Spacer with injection nozzles |
| CN102071679A (en) * | 2010-12-29 | 2011-05-25 | 西安建筑科技大学 | Method for consolidating existing building foundation |
| CN203808057U (en) * | 2014-05-07 | 2014-09-03 | 孔超 | Pile bottom rear grouting cast-in-place belled pile |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104988907A (en) * | 2015-08-02 | 2015-10-21 | 王继忠 | Construction method of concrete pile |
| CN109853529A (en) * | 2017-09-26 | 2019-06-07 | 冷伟 | Construction techniques |
| CN112922586A (en) * | 2021-02-24 | 2021-06-08 | 武汉长盛工程检测技术开发有限公司 | Single-line inertial navigation type dry-wet hole forming quality detection device and method |
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| CN104074184B (en) | 2017-01-25 |
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