CN101338560A - Construction method for reinforced concrete pile - Google Patents
Construction method for reinforced concrete pile Download PDFInfo
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- CN101338560A CN101338560A CNA2007100579781A CN200710057978A CN101338560A CN 101338560 A CN101338560 A CN 101338560A CN A2007100579781 A CNA2007100579781 A CN A2007100579781A CN 200710057978 A CN200710057978 A CN 200710057978A CN 101338560 A CN101338560 A CN 101338560A
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Abstract
The invention discloses a construction method for a reinforced concrete pile, which aims at providing a construction method for a reinforced concrete pile which ensures that the construction working surface is clean, the quantity of the construction machine is few, the construction efficiency is high, the quality is good and the cost is low. The method comprises the following steps: a long spiral drilling machine is adopted to perform the rock-socketed drilling forming through a dry method; after a borehole is formed, a drill bit with a valve is changed, tripping and declogging are performed, concrete is pumped into the core rod of a bull rod through a pipeline to ensure the concrete to get into pile holes, and then the concrete is continually poured and piles are formed; a reinforcing cage is inversely inserted, and the construction of the reinforced concrete pile is accomplished. The method adopts the long spiral drilling machine anhydrous rock-socketed construction, pipe inner pump pressing pile body concrete, and counter-insert reinforcing cage pile-forming processes, which reduces the construction machines and manpower, does not damage the filled road embankment and pollute the working surface and the peripheral environment water system; the working surface is clean, the shrinkage cavity and the collapsed cavity are effectively controlled, the construction quality is reliable, the construction efficiency is high, and the cost is low.
Description
Technical field
The present invention relates to a kind of job practices, in particular, relate to a kind of job practices of reinforced concrete pile.
Background technology
The bored pile construction technology is widely used in the various engineering constructions as pile foundation.Job practices commonly used is the employing Churn drill, holes towards grabbing brill, positive and negative rotary drilling etc., because above-mentioned pore-forming equipment needs a large amount of mud offs when boring, usually can pollute work plane and peripheral environment water system, and the scope of application is subjected to certain restriction.In recent years, introduced to revolve and dug the hole equipment that is drilled to from Germany, Italy again, this equipment can be used for the dry method pore-forming, and this equipment adapted has the short augers of suitable Different Strata, the dredge drill bit and the drill bit etc. of digging sand.The steps in sequence of dry construction is boring-clear hole-lay reinforcing cage-concrete perfusion.After the boring, need to use special equipment that the stake hole is cleared up.Because the brill quarrel of bottom, stake hole is difficult to clean out, and usually can influence construction quality.And, because construction machinery is many, the constructing operation complexity, efficiency of construction is lower, the construction cost height.And, lay reinforcing cage concrete perfusion again after the boring earlier, the knocking time in stake hole, quality problems such as hole easily contract, collapse during the knocking of stake hole.At present, the long-spiral drilling machine pile foundation construction process is used wider at home, but because the influence of construction drill bit, institute's application project geological conditions mostly is the reinforcing soft foundation friction foundation, how not to go into the requirement of the rock degree of depth, and the scope of application is restricted.
Summary of the invention
The present invention is in order to overcome weak point of the prior art, to provide a kind of and can make the cleaning of construction working face, and construction machinery is few, the efficiency of construction height, and quality is good, the job practices of the reinforced concrete pile that cost is low.
The present invention is achieved through the following technical solutions:
A kind of job practices of reinforced concrete pile is characterized in that, comprises the steps:
(1) boring: use long-spiral drilling machine to adopt dry method embedding rock boring moulding, wherein long-spiral drilling machine adopts the alloy steel augers;
(2) perfusion pile concrete: after the boring moulding, long-spiral drilling machine is changed the drill bit that has valve, afterwards, under bore clear hole, make at the bottom of the hole heavy quarrel get into drilling rod and fly on the leaf, when drill bit is down at the bottom of the hole, concrete is pumped in the core bar of drilling rod by pipeline, when concrete be full of drilling rod 2/3rds the time, begin to promote drilling rod, simultaneously, open the valve of drill bit, concrete is entered in the hole, concrete continuous perfusion pile;
(3) instead insert reinforcing cage: before the pile concrete perfusion, be ready to reinforcing cage earlier, the reinforcing bar of reinforcing cage lower end is gathered to the center, be fixed in the guide pipe at reinforcing cage center, be welded with draw ring on the guide pipe of reinforcing cage upper end, an end of turnbuckle is connected with draw ring, the other end is connected with reinforcing cage, by draw ring and turnbuckle reinforcing cage is fixed on the guide pipe, is fixed with lamina affixad in the upper end of guide pipe, described lamina affixad is provided with form vibrator; After the pile concrete perfusion is finished, remove drilling rod, reinforcing cage is aligned the boring position, insert 2-3m in the stake hole of having poured into by the reinforcing cage own wt, afterwards, open form vibrator, insert reinforcing cage while vibrating, reinforcing bar traction guide pipe and reinforcing cage that the reinforcing cage lower end is gathered enter in the hole concrete; After reinforcing cage inserts inner concrete bottom, stake hole, unclamp turnbuckle and slowly extract guide pipe while vibrating, finish the construction of reinforced concrete pile.
When being filled into the stake top, more than the design elevation of stake top, add the concrete of irritating 0.8-1.0cm.
When the perfusion pile concrete, the speed of pumping of concrete and the hoisting velocity of drilling rod are complementary, and drill bit is embedded in the concrete all the time.
In the concrete continuous filling process, concrete slump is controlled at 19～22cm.
The spiral of the alloy steel augers upper edge drill bit of long-spiral drilling machine is laid with the replaceable carbide button vertical with spiral.
The present invention has following technique effect:
1. the present invention adopts the anhydrous embedding rock construction of long-spiral drilling machine, pump pressure in pipe concrete piles, anti-slotting reinforcing cage one machine pile-formation process, construction machinery and labour have been reduced, do not destroy and filled out embankment and do not polluted work plane and the environment water system of periphery, the work plane cleaning has reduced working strength of workers.And, make the hole of contracting, collapse obtain effective control, can avoid the generation of bury drills, lock of tool drilling, reliable construction quality can be kept the safety in production, the efficiency of construction height, construction cost is low.
2. this technology is by improving the long-spiral drilling machine drill bit, and adopts alloy tool steel bit, successful solution long auger machine pore-forming in the rock stratum, creep into problem, expanded the range of application of long-spiral drilling machine.
3. owing to adopt long-spiral drilling machine, can use to have the drilling rod that flies leaf, when drilling rod descends in the hole, can make at the bottom of the hole heavy quarrel get into drilling rod and fly on the leaf, simplified clear hole technology, and clear hole better effects if help ensureing construction quality.
4. owing to adopt the anti-reinforcing cage construction technology of inserting, behind the pore-forming, pour into concrete piles immediately, the common quality defect in boring shrinkage cavity, the hole that collapses when having avoided laying reinforcing cage earlier behind the pore-forming; And under reinforcing cage, insert and guide pipe on pull out in the process the vibrating of concrete piles, effectively guaranteed the compactness of concrete piles.
Description of drawings
Fig. 1 is the schematic diagram of long-spiral drilling machine drill bit of the present invention;
Fig. 2 is the anti-construction schematic diagram of inserting reinforcing cage;
Fig. 3 is the annexation schematic diagram of guide pipe and reinforcing cage.
The specific embodiment
Below in conjunction with the drawings and specific embodiments to the detailed description of the invention.
The job practices of reinforced concrete pile of the present invention comprises the steps:
(1) boring: use long-spiral drilling machine to adopt dry method boring moulding, wherein long-spiral drilling machine adopts the alloy steel augers.In order to improve the efficient of boring, lay replaceable carbide button at drill bit peripheral helicoid shape, the schematic diagram of described alloy steel augers is laid with the replaceable carbide button 10 vertical with drill bit spiral part 9 along the spiral part of drill bit in the present embodiment as shown in Figure 1.The quantity of carbide button determines that according to the diameter of boring general spiral part along drill bit is aligned to drilling rod is crossing and gets final product, and is that 60cm boring is example with the diameter, establishes 18 of carbide buttons altogether.Carbide button and drill bit spiral part adopt spiral screw thread and drill bit to be connected and fixed, to realize the replacing of carbide button.
When beginning boring, adopt the alloy steel augers, move down drilling rod when drill bit touches ground, actuating motor creeps into, and is generally should slow earlier back fast, can reduce drilling rod like this and rock, and checks the deviation of boring again easily, so that in time correct.In pore forming process,, drilling rod, drilling tool are damaged as finding that drilling rod rocks or during difficult boring, should slowing down drilling depth, otherwise more easily cause a hole deflection, displacement.
In drilling process, the recorder writes down the current value and the corresponding drilling depth of rig ammeter and observes rate of penetration, and as finding that current value increases suddenly, the rig load strengthens, and this moment, speed was slack-off, write down peak point current.The recorder will write down the drilling depth of this moment, and this degree of depth is the interface depth of soil layer and rock stratum, and what down pierce respective specified again goes into the rock degree of depth, carry then and be drilled to the hole, when being cut clearly, do not allow too much the falling in the hole of quarrel soil, and foreign material are located in the aperture cleaned out, can descend the step operation.
(2) perfusion pile concrete: after the boring moulding, long-spiral drilling machine is changed the drill bit that has valve, afterwards, the clear hole of following brills makes that sinking at the bottom of the hole is cut and gets into drilling rod to fly on the leaf.When drill bit is down at the bottom of the hole, concrete is pumped in the core bar of drilling rod by pipeline, when concrete be full of drilling rod 2/3rds the time, begin to promote drilling rod, simultaneously, open the valve of drill bit, concrete is entered in the hole, concrete continuous perfusion pile.
Boring is after managing acceptance(check), and rig is changed the drill bit of band valve, the clear hole of following brill.Fly leaf owing to have usually on the drilling rod of long-spiral drilling machine, the heavy quarrel that the drill bit rotation takes up is fallen drilling rod and is flown on the leaf.Reduce special clear hole equipment and clear hole operation, reduced the engineering time.When drill bit is down at the bottom of the hole, beginning pumping concrete, when drilling rod core pipe concrete be full of drilling rod 2/3rds the time begin to promote drilling rod, this moment the drill bit valve open, concrete enters in the hole.The speed of pumping concrete and the hoisting velocity of drilling rod are complementary, and drill bit is embedded in the concrete all the time, require concrete slump to be controlled at 19～22cm.Forbid stock behind the first tube drawing, concrete is answered the continous pouring pile, must not form constuction joint.For guaranteeing a top quality, more than the design elevation of stake top, add the filling certain altitude, be generally 0.8～1.0cm.Fall drilling rod and fly heavy quarrel on the leaf along with the lifting of drilling rod is taken out of, clear hole is effective, has improved construction quality.
(3) instead insert reinforcing cage: the construction schematic diagram of reinforcing cage as shown in Figure 2, Fig. 3 is the annexation schematic diagram of guide pipe and reinforcing cage, before the pile concrete perfusion, be ready to reinforcing cage earlier, the reinforcing bar 6 of reinforcing cage 4 lower ends is gathered to the center, be fixed in the guide pipe 5 at reinforcing cage center, be connected with draw ring 3 on the guide pipe of reinforcing cage upper end, one end of turnbuckle 8 is connected with draw ring, the other end is connected with reinforcing cage, by draw ring and turnbuckle reinforcing cage is fixed on the guide pipe, is fixed with lamina affixad 2 in the upper end of guide pipe, described lamina affixad is provided with form vibrator 1.After the pile concrete perfusion is finished, remove drilling rod, reinforcing cage is aligned the boring position, insert 2-3m in the stake hole of having poured into by the reinforcing cage own wt.After confirming the reinforcing cage position, open form vibrator, insert reinforcing cage while vibrating, reinforcing bar traction guide pipe and reinforcing cage that the reinforcing cage lower end is gathered enter in the hole concrete.In order to guarantee the guide pipe vertical, on the draw ring of three directions of vibrator lamina affixad, fasten rope 7 in advance, with artificial stay cord permanent position.After reinforcing cage inserts inner concrete bottom, stake hole, unclamp turnbuckle, take off draw ring, slowly extract guide pipe while vibrating, finish the construction of reinforced concrete pile.
Job practices of the present invention has been initiated contrary sequence method pile foundation construction technology, developed the disposable dry method pore-forming of long-spiral drilling machine adapted alloy bit, the pump pressure in pipe concrete, the anti-reinforcing cage one machine bore forming technology of inserting has shortened the knocking time in stake hole to greatest extent, the generation of the quality problems such as hole of having avoided contracting, collapse during the knocking of stake hole, expanded the application space of long-spiral drilling machine, improved efficiency of construction, realized requisite quality, cost reduces.
Claims (5)
1, a kind of job practices of reinforced concrete pile is characterized in that, comprises the steps:
(1) boring: use long-spiral drilling machine to adopt dry method embedding rock boring moulding, wherein long-spiral drilling machine adopts the alloy steel augers;
(2) perfusion pile concrete: after the boring moulding, long-spiral drilling machine is changed the drill bit that has valve, afterwards, under bore clear hole, make at the bottom of the hole heavy quarrel get into drilling rod and fly on the leaf, when drill bit is down at the bottom of the hole, concrete is pumped in the core bar of drilling rod by pipeline, when concrete be full of drilling rod 2/3rds the time, begin to promote drilling rod, simultaneously, open the valve of drill bit, concrete is entered in the hole, concrete continuous perfusion pile;
(3) instead insert reinforcing cage: before the pile concrete perfusion, be ready to reinforcing cage earlier, the reinforcing bar of reinforcing cage lower end is gathered to the center, be fixed in the guide pipe at reinforcing cage center, be welded with draw ring on the guide pipe of reinforcing cage upper end, an end of turnbuckle is connected with draw ring, the other end is connected with reinforcing cage, by draw ring and turnbuckle reinforcing cage is fixed on the guide pipe, is fixed with lamina affixad in the upper end of guide pipe, described lamina affixad is provided with form vibrator; After the pile concrete perfusion is finished, remove drilling rod, reinforcing cage is aligned the boring position, insert 2-3m in the stake hole of having poured into by the reinforcing cage own wt, afterwards, open form vibrator, insert reinforcing cage while vibrating, reinforcing bar traction guide pipe and reinforcing cage that the reinforcing cage lower end is gathered enter in the hole concrete; After reinforcing cage inserts inner concrete bottom, stake hole, unclamp turnbuckle and slowly extract guide pipe while vibrating, finish the construction of reinforced concrete pile.
2, the job practices of reinforced concrete pile according to claim 1 is characterized in that, when being filled into the stake top, adds the concrete of irritating 0.8-1.0cm more than the design elevation of stake top.
3, the job practices of reinforced concrete pile according to claim 1 is characterized in that, when the perfusion pile concrete, the speed of pumping of concrete and the hoisting velocity of drilling rod are complementary, and drill bit is embedded in the concrete all the time.
4, the job practices of reinforced concrete pile according to claim 1 is characterized in that, in the concrete continuous filling process, concrete slump is controlled at 19～22cm.
5, the job practices of reinforced concrete pile according to claim 1 is characterized in that, the spiral of the alloy steel augers upper edge drill bit of long-spiral drilling machine is laid with the replaceable carbide button vertical with spiral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100579781A CN101338560A (en) | 2007-07-03 | 2007-07-03 | Construction method for reinforced concrete pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100579781A CN101338560A (en) | 2007-07-03 | 2007-07-03 | Construction method for reinforced concrete pile |
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| CN101338560A true CN101338560A (en) | 2009-01-07 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892663A (en) * | 2010-07-13 | 2010-11-24 | 新疆电力设计院 | Pile foundation manufacturing method |
| CN102477736A (en) * | 2010-11-25 | 2012-05-30 | 中铁十八局集团有限公司 | Counter-insert reinforcement cage for reinforced concrete pile net construction |
| CN102605768A (en) * | 2012-03-31 | 2012-07-25 | 中建三局建设工程股份有限公司 | Bore cleaning device for cast-in-place bored piles |
| CN110144873A (en) * | 2019-05-31 | 2019-08-20 | 中国二十二冶集团有限公司 | Mud geology relief hole fills sand device and fills sand method |
-
2007
- 2007-07-03 CN CNA2007100579781A patent/CN101338560A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892663A (en) * | 2010-07-13 | 2010-11-24 | 新疆电力设计院 | Pile foundation manufacturing method |
| CN102477736A (en) * | 2010-11-25 | 2012-05-30 | 中铁十八局集团有限公司 | Counter-insert reinforcement cage for reinforced concrete pile net construction |
| CN102605768A (en) * | 2012-03-31 | 2012-07-25 | 中建三局建设工程股份有限公司 | Bore cleaning device for cast-in-place bored piles |
| CN102605768B (en) * | 2012-03-31 | 2014-08-13 | 中建三局建设工程股份有限公司 | Bore cleaning device for cast-in-place bored piles |
| CN110144873A (en) * | 2019-05-31 | 2019-08-20 | 中国二十二冶集团有限公司 | Mud geology relief hole fills sand device and fills sand method |
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Open date: 20090107 |