CN101812843B - Centre grouted poured post-grouting pile construction methods, and grouter and grout injector used thereby - Google Patents

Centre grouted poured post-grouting pile construction methods, and grouter and grout injector used thereby Download PDF

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Publication number
CN101812843B
CN101812843B CN2010101506883A CN201010150688A CN101812843B CN 101812843 B CN101812843 B CN 101812843B CN 2010101506883 A CN2010101506883 A CN 2010101506883A CN 201010150688 A CN201010150688 A CN 201010150688A CN 101812843 B CN101812843 B CN 101812843B
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hole
pipe
slurry
grouting
casting machine
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CN101812843A (en
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刘德明
王锐
张旭明
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HEILONGJIANG DONGMEI CONSTRUCTION FOUNDATION ENGINEERING Co Ltd
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HEILONGJIANG DONGMEI CONSTRUCTION FOUNDATION ENGINEERING Co Ltd
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Abstract

The invention discloses a centre grouted post-grouting pile construction methods, and a grouter and a grout injector used thereby, and solve the problems of incorrect insertion position of a grouting pipe, easy deformation of the grouting pipe, low construction efficiency, high construction cost, small bearing force, poor efficiency of reinforcing loose soil at the bottom of a bore and the like in a bore bottom and bore side post-grouting construction method. The method I and the method IV comprise steps of downwards lowering the grout injector through a core tube of a drilling tool and then injecting concrete into the bore through the core tube of the drilling tool; the method II comprises steps of downwards lowering the grout injector through a steel tube and then injecting concrete into the bore through the steel tube; the method III comprises a step of downwards lowering the body of a grout injecting tube through a convoying device of the grout injecting tube; a broken stone feeding guide plate of the grouter and a concrete conveying pipe are communicated with a feed tube of the grout injecting tube respectively; a compression ring and a concrete baffling steel ring are fixedly arranged on the outer wall of the pore bottom grout injecting tube of the grout injector adopted by the method I and the method II; and a convoying device body is sleeved on the grout injector body adopted by the method III. The centre grouted post-grouting pile construction methods, the grouter and the grout injector are applied in the technical field of concrete grouted pipe construction.

Description

The irrigator of center poured post-grouting pile construction methods and use thereof and slurry casting machine
Technical field
The present invention relates to the irrigator and the slurry casting machine of a kind of grouting pile construction methods and use thereof, belong to the construction foundation working technical field.
Background technology
At present, traditional bottom outlet rear flank, hole mud jacking construction method is all realized under dried operation pore-forming or mud off pore-forming technique, though conventional construction method has solved the problem of bearing capacity of pile tip and the raising of stake side frictional resistance, but has following weak point.
1) when mud off technology, need carry out hole wall with mud and support, need a large amount of pulpings, therefore need plasma discharge, job site will begin to rehearse dirty ditch and pulping pond, contaminated environment also influences on-the-spot civilized construction simultaneously.
2) owing to will use mud off, just need carry out catheter perfusion, efficiency of construction is low, and the field control difficulty strengthens, the bad assurance of pouring quality.
3) conventional holes bottom outlet rear flank mud jacking construction method is owing to need use the swell soil pulping, and needs crane to hang conduit to carry out concrete spouting, make the engineering cost increasing.
Center guncreting job practices, speed of application is fast, first pore-forming, concrete perfusion, descending reinforcing cage then.But this job practices can produce a part of loosened soil at the stake end, makes bearing capacity of pile tip bad, and the total bearing capacity of this job practices institute pile is little.
Bottom outlet rear flank, existing hole mud jacking construction method, though also solved the drawback of some conventional holes bottom outlet rear flank mud jacking worker methods, but have following weak point.
First point: some job practices is welded together or tie together with Grouting Pipe and reinforcing cage, be used for hole-bottom slurry-injection, because Grouting Pipe is generally thinner, when this hole entirely during cage, remaining Grouting Pipe insufficient strength in the hole then, promptly use reinforcing bar to strengthen, during Grouting Pipe, also easily bending phenomenon occurs for Grouting Pipe instantly, thereby it is not in place that Grouting Pipe is inserted, after concrete setting, concrete blocks grouting port, can't slip casting; In addition when when construction, when hole depth changes, when promptly hole depth is deepened, because Grouting Pipe is welded together or tie together with reinforcing cage, Grouting Pipe can takes place insert problem not in place, when the above situation of generation, just do not had the effect of loosened soil at the bottom of the reinforced hole.
Second point: some job practices is welded in helical blade carries out pressure grouting at the bottom of piercing the hole on the Grouting Pipe; Because Grouting Pipe is generally thinner, when the hole is dark, Grouting Pipe is rotated when being screwed into, may become fried dough twist type, bending in the middle of the Grouting Pipe or twist into two parts; When buckling, be screwed into the hole sidewall easily, so just do not had effect that loosened soil at the bottom of the hole is reinforced.When rotation is screwed into Grouting Pipe, protect thing to scrape grouting port easily, block grouting port, influence grouting quality.The stratum more than highly weathered rock at gravel layer or hardness, difficult when rotation is screwed into Grouting Pipe.
Thirdly: some job practices is directly sent into Grouting Pipe in the base concrete of hole, and when concrete had certain intensity, first water was washed passage open, is injecting cement paste afterwards; This job practices water is during towards passage, because grouting port is in concrete, grouting port circumferential concrete intensity is close, and water might make progress or side direction is rived pile body does not have the effect of loosened soil at the bottom of the reinforced hole; In addition since during the water punching pressure bigger, connect badly as joint, hurt sb.'s feelings easily.
The 4th point: some job practices only is applicable to mud off pore-forming or dry hole, promptly first pore-forming, and descending reinforcing cage and Grouting Pipe are carried out the underwater concreting pile with conduit again.Efficiency of construction is low, and engineering cost is big.
The 5th point: add parts such as non retern valve or blade in some job practices on the Grouting Pipe, it is complicated that Grouting Pipe is made, and is unfavorable for the processing use, and increased engineering cost.
Publication number is CN1920183A, open day is on February 28th, 2007, name is called " pump-grouting concrete pile bottom mud jacking method and madjack pipe structure thereof ", publication number is CN1563602A, open day is on January 12nd, 2005, name is called " construction technology of cast-in-place concrete pile and pile end grouting device thereof ", publication number is CN101289855A, open day is on October 22nd, 2008, name is called " job practices of stake side slip casting uplift pile ", and publication number is CN1609347A, open day is on April 27th, 2005, name is called that just there is the first above-mentioned point in disclosed job practices in the patent of " follow-up mud jacking rotary digging drilling hole bored concrete pile technology ", thirdly, the 4th and the 5th deficiency.
Publication number is CN101100858A, open day be January 9 in 2008 day, be called that disclosed job practices just exists above-mentioned and the 5th deficiency at second in the patent of " job practices and the construction equipment thereof of drilling tool center pumping concrete post mudjack concrete pouring pile ".
Publication number is CN1540104A, open day be October 27 in 2004 day, be called that disclosed job practices just exists above-mentioned and the 5th deficiency at first in the patent of " bored pile stake side, pile bottom post grouting construction technology and grouting equipment ".
Summary of the invention
The objective of the invention is for solve the Grouting Pipe that exists in the mud jacking construction method of bottom outlet rear flank, existing hole insert not in place, yielding, be unfavorable for processing use, efficiency of construction is low, bearing capacity is little, engineering cost is big and reinforced hole at the bottom of the problem of loosened soil weak effect, and then provide the irrigator and the slurry casting machine of a kind of center poured post-grouting pile construction methods and use thereof.
The technical scheme one of center of the present invention poured post-grouting pile construction methods: this job practices is achieved in that step 1: drilling tool is to last stake site, and boring is to designing hole depth; Step 2: with slurry casting machine by irrigator Grouting Pipe input pipe and at the bottom of the core pipe of drilling tool delivers to the hole; Step 3: the core pipe that the rubble of rubble by irrigator dropped into guide plate and drilling tool is delivered at the bottom of the hole, and the rubble input highly is 0.5-1m; Step 4: when promoting drilling tool when dropping into rubble to 1/2 place of rubble input height, by pumping of concrete to the elephant trunk of irrigator, and concrete perfusion is carried drilling tool to ground simultaneously to ground in the core Guan Xiangkong by drilling tool, and slurry casting machine is stayed in the hole; Step 5: descending reinforcing cage, hole side Grouting Pipe is directly installed on the reinforcing cage, together is lowered in the concrete with reinforcing cage; Step 6: respectively at the bottom of the hole and hole side is carried out slip casting, pile by slurry casting machine and hole side Grouting Pipe after concrete perfusion 2-30 days.
The irrigator that is used to realize the technical scheme one of center poured post-grouting pile construction methods and uses of the present invention, this irrigator drops into guide plate by Grouting Pipe input pipe, rubble and elephant trunk is formed, have two notches from top to bottom on the tube wall of described Grouting Pipe input pipe, described rubble drops into that guide plate is fixedly mounted on that Grouting Pipe drops on the outer wall of pipe and is corresponding with any one notch in two notches, and described elephant trunk is fixedly mounted on that Grouting Pipe drops on the outer wall of pipe and is corresponding with vacant notch in two notches.
The slurry casting machine that is used to realize the technical scheme one of center poured post-grouting pile construction methods and uses of the present invention, described slurry casting machine comprises the hole-bottom slurry-injection pipe, described slurry casting machine also comprises suspension ring, nut, pressure ring, many reinforcing bars, sealing point and retaining mud steel loops; The outer wall of the upper end of described hole-bottom slurry-injection pipe is provided with the screw thread that length G is 30-50mm, described nut is threaded with the upper end of hole-bottom slurry-injection pipe, described suspension ring are fixedly mounted on the upper surface of nut, described sealing point is fixedly mounted on the lower surface of hole-bottom slurry-injection pipe, described retaining mud steel loop is fixedly mounted on the outer wall of hole-bottom slurry-injection pipe, and the lower surface of retaining mud steel loop is 50-300mm to the distance L of the sharp lower end of sealing, described pressure ring is fixedly mounted on the outer wall of hole-bottom slurry-injection pipe, and the lower surface of pressure ring is 150-200mm to the upper surface that keeps off the mud steel loop apart from K, evenly have a plurality of injected holes on the hole-bottom slurry-injection pipe between described retaining mud steel loop and the pressure ring, be connected by many reinforcing bars between described retaining mud steel loop and the pressure ring.
The technical scheme two of center of the present invention poured post-grouting pile construction methods: this job practices is achieved in that step 1: the stake point of steel pipe to last stake site, is sunk to the design hole depth by vibration or hammering or static pressure with steel pipe; Step 2: descending reinforcing cage, hole side Grouting Pipe is directly installed on the reinforcing cage, together is lowered in the steel pipe with reinforcing cage; Step 3:, deliver to the steel pipe bottom with the feeding port that slurry casting machine is opened by steel pipe upper port or steel pipe upper end side; Step 4: with the feeding port that rubble is opened by steel pipe upper port or steel pipe upper end side, deliver to the steel pipe bottom, the rubble input highly is 0.5-1m; Step 5: after dropping into rubble, the feeding port of opening by steel pipe upper port or steel pipe upper end side to pouring concrete within steel pipe to designing the top mark height; Step 6: promote steel pipe to ground, slurry casting machine is stayed in the hole; Step 7: respectively at the bottom of the hole and hole side is carried out slip casting, pile by slurry casting machine and hole side Grouting Pipe after concrete perfusion 2-30 days.
The slurry casting machine that is used to realize the technical scheme two of center poured post-grouting pile construction methods and uses of the present invention, described slurry casting machine comprises the hole-bottom slurry-injection pipe, described slurry casting machine also comprises suspension ring, nut, pressure ring, many reinforcing bars, sealing point and retaining mud steel loops; The outer wall of the upper end of described hole-bottom slurry-injection pipe is provided with the screw thread that length G is 30-50mm, described nut is threaded with the upper end of hole-bottom slurry-injection pipe, described suspension ring are fixedly mounted on the upper surface of nut, described sealing point is fixedly mounted on the lower surface of hole-bottom slurry-injection pipe, described retaining mud steel loop is fixedly mounted on the outer wall of hole-bottom slurry-injection pipe, and the lower surface of retaining mud steel loop is 50-300mm to the distance L of the sharp lower end of sealing, described pressure ring is fixedly mounted on the outer wall of hole-bottom slurry-injection pipe, and the lower surface of pressure ring is 150-200mm to the upper surface that keeps off the mud steel loop apart from K, evenly have a plurality of injected holes on the hole-bottom slurry-injection pipe between described retaining mud steel loop and the pressure ring, be connected by many reinforcing bars between described retaining mud steel loop and the pressure ring.
The technical scheme three of center of the present invention poured post-grouting pile construction methods: this job practices is achieved in that step 1: drilling tool is drilled into the design hole depth to last stake site; Step 2: carry drilling tool to ground, pass through the core pipe concrete perfusion of drilling tool simultaneously to ground; Step 3: descending reinforcing cage, the sidewall Grouting Pipe is directly installed on the reinforcing cage, together is lowered in the concrete with reinforcing cage; Step 4: slurry casting machine is sent in the hole, and guaranteed that the bottom of slurry casting machine is positioned at end 0.3-1m place under the hole; Step 5: Grouting Pipe is escorted device mention ground, the hole-bottom slurry-injection pipe of slurry casting machine is stayed in the hole; Step 6: respectively at the bottom of the hole and hole side is carried out slip casting, pile by slurry casting machine and hole side Grouting Pipe after concrete perfusion 2-30 days.
The slurry casting machine that is used to realize the technical scheme three of center poured post-grouting pile construction methods and uses of the present invention, described slurry casting machine escorts device by slurry casting machine main body and Grouting Pipe to be formed, and described slurry casting machine main body is made up of suspension ring, nut, hole-bottom slurry-injection pipe, pressure ring, many reinforcing bars, sealing point and retaining mud steel loops; Described Grouting Pipe is escorted device by linking up with and escorting the device main body and form, the outer wall of the upper end of described hole-bottom slurry-injection pipe is provided with the screw thread that length G is 30-50mm, described nut is threaded with the upper end of hole-bottom slurry-injection pipe, described suspension ring are fixedly mounted on the upper surface of nut, described sealing point is fixedly mounted on the lower surface of hole-bottom slurry-injection pipe, described retaining mud steel loop is fixedly mounted on the outer wall of hole-bottom slurry-injection pipe, and the lower surface of retaining mud steel loop is 50-300mm to the distance L of the sharp lower end of sealing, described pressure ring is fixedly mounted on the outer wall of hole-bottom slurry-injection pipe, and the lower surface of pressure ring is 150-200mm to the upper surface that keeps off the mud steel loop apart from K, evenly have a plurality of injected holes on the hole-bottom slurry-injection pipe between described retaining mud steel loop and the pressure ring, be connected by many reinforcing bars between described retaining mud steel loop and the pressure ring, described hook is fixedly mounted on the inwall that escorts device main body upper end, escort the device main body and be sleeved on slurry casting machine main body upper end, the lower end of escorting the device main body is against on the upper surface of pressure ring, and described suspension ring hang on the hook.
The technical scheme four of center of the present invention poured post-grouting pile construction methods: this job practices is achieved in that step 1: drilling tool is to last stake site, and boring is to designing hole depth; Step 2: with slurry casting machine by irrigator Grouting Pipe input pipe and at the bottom of the core pipe of drilling tool delivers to the hole; Step 3: by pump concrete is delivered in the elephant trunk of irrigator, and simultaneously drilling tool is carried to ground to ground by concrete perfusion in the core Guan Xiangkong of drilling tool, slurry casting machine is stayed in the hole; Step 5: descending reinforcing cage, hole side Grouting Pipe is directly installed on the reinforcing cage, together is lowered in the concrete with reinforcing cage, injects water in the 24-48 behind concrete perfusion hour in slurry casting machine, opens the slip casting passage; Step 6: respectively at the bottom of the hole and hole side is carried out slip casting, pile by slurry casting machine and hole side Grouting Pipe after concrete perfusion 2-30 days.
The present invention compared with prior art has following effect: 1) because three kinds of job practicess of the present invention all need not to use mud and crane, greatly reduce construction cost.2) job practices one of the present invention adopts the core pipe of drilling tool to transfer slurry casting machine, concrete is by in the core pipe injection hole of drilling tool, job practices two adopts steel pipe to transfer slurry casting machine, concrete is by in the steel pipe injection hole, job practices three is escorted device below Grouting Pipe main body by Grouting Pipe, the hole side Grouting Pipe and the reinforcing cage of three kinds of job practicess are together transferred hand-hole, realized carrying out at the bottom of the hole simultaneously and hole side pressure slurry, adopt three kinds of stakes that job practices became of the present invention to compare with common filling pile, its bearing capacity has improved more than 1.5 times, compare with pouring mortar pile after the tradition, its efficiency of construction has improved more than 1 times.3) job practices one of the present invention adopts the core pipe of drilling tool to transfer slurry casting machine, job practices two adopts in the steel pipe transfers slurry casting machine, job practices three is escorted slip casting tube body under the device by Grouting Pipe, it is accurate to have emplacement depth, emplacement depth is optional, reinforce at the bottom of the hole in the loosened soil, particularly job practices three slurry casting machine and entered at the bottom of the hole in the primitive soil, reinforced primitive soil at the bottom of the hole.4) in job practices three, slurry casting machine is to adopt artificial downpressure or mechanical oscillation downpressure to send in the hole, slurry casting machine under this kind method, power are vertically downward, do not have rotation phenomenon to produce, the minimum that influences to injected hole protection thing, owing at the injected hole upper and lower side mud retaining ring and pressure ring are arranged, can protect injected hole when slurry casting machine is transferred again, injected hole protection thing can not wiped off, injected hole can be plugged, and then protect grouting quality; Again because Grouting Pipe is added with round steel pipe outward, downforce is the bottom that acts on Grouting Pipe by round steel pipe and pressure ring, therefore Grouting Pipe can not produce bending and modification, and this kind mode is lower to the requirement of strength of whole slurry casting machine, tackling slurry casting machine and slurry casting machine mutually, to escort the Materials And Process Requirement of device also low, the cost cost is also very low relatively, can guarantee grouting quality.5) all need not mud in three kinds of job practicess of the present invention and carry out retaining wall, and adopt drilling tool, steel pipe and drilling tool that hole wall is supported respectively, eliminated mud skin, undergauge phenomenon, improved stake side frictional resistance and pile quality.6) at the bottom of job practices two mesopores of the present invention, rear flank, hole mud jacking, the stake that it became is compared with tube-sinking cast-in-situ pile with prefabricated tubular pile, the advantage that has promptly kept the soil compaction stake, be not unearthed, Gao Zaili, on this basis again by at the bottom of the hole, the floating greatly degree of the back mud jacking of hole side improved the bearing capacity of stake, it is long to have shortened stake simultaneously, has reduced construction cost.7) injected hole of slurry casting machine all is in the rubble in job practices one of the present invention and the job practices two, has eliminated the drawback of concrete shutoff injected hole, makes grouting quality controlled, and slip casting effect is good.Slurry casting machine is admitted at the bottom of the hole in the original soil layer accurately in the job practices three, and during water elder generation punching, required hydraulic pressure is also less, can not hurt sb.'s feelings and splitting concrete pile body, and can guarantee loosened soil and primitive soil at the bottom of the reinforced hole accurately.8) three kinds of construction tools that job practices adopted of the present invention simple in structure, not yielding, cheap, be convenient to processing, reliability and better maintainable.9) the hole side Grouting Pipe in three kinds of job practicess of the present invention is installed in the main muscle that serves as reinforcing cage on the reinforcing cage, and except that saving the construction costs, hole side Grouting Pipe also can be served as the spy side pipe and be used.10) job practices one of the present invention is applicable to the fetch earth cast-in-place concrete pile of center perfusion channel of helical blade; Job practices two is applicable to the cast-in-place concrete pile of the non-helical center perfusion channel that fetches earth; Job practices three is applicable to all cast-in-place concrete piles, is particularly useful for various lithospheres, ovum gravel stratum and other is than hard formation.11) job practices four of the present invention, after the concrete that has pressure impacted pressure ring on the Grouting Pipe, Grouting Pipe was by the closed point of deadweight, concrete impact force and Grouting Pipe lower end, and meeting equally be washed apex point open to lance, rushes at the bottom of primitive soil and the hole in the loosened soil; Even the grouting port place is surrounded by concrete, also can be very thin, will wash open with the water that pressure is little, can not hurt sb.'s feelings and splitting concrete pile body, and can guarantee loosened soil and primitive soil at the bottom of the reinforced hole accurately.
Description of drawings
Fig. 1 is the construction equipment schematic diagram of job practices one of the present invention, Fig. 2 is the overall structure figure of irrigator, Fig. 3 is the overall structure schematic diagram of the slurry casting machine of use in job practices one of the present invention and the job practices two, Fig. 4 is the overall structure schematic diagram of the slurry casting machine of use in the job practices three of the present invention, and Fig. 5 is the overall structure figure that the Grouting Pipe of the slurry casting machine of use in the job practices three of the present invention is escorted device.
The specific embodiment
The specific embodiment one: in conjunction with Fig. 1 present embodiment is described, the center poured post-grouting pile construction methods of present embodiment is achieved in that step 1: 9 pairs of drilling tools are gone up the stake site, and boring is to designing hole depth; Step 2: with slurry casting machine by irrigator Grouting Pipe input pipe 1 and at the bottom of the core pipe 10 of drilling tool 9 delivers to the hole; Step 3: the core pipe 10 that the rubble of rubble by irrigator dropped into guide plate 2 and drilling tool 9 is delivered at the bottom of the hole, and the rubble input highly is 0.5-1m; Step 4: when promoting drilling tool 9 when dropping into rubble to 1/2 place of rubble input height, by pumping of concrete to the elephant trunk 3 of irrigator, and core pipe 10 concrete perfusion in the hole by drilling tool 9 carries drilling tool 9 to ground simultaneously to ground, and slurry casting machine is stayed in the hole; Step 5: descending reinforcing cage, hole side Grouting Pipe is directly installed on the reinforcing cage, together is lowered in the concrete with reinforcing cage; Step 6: respectively at the bottom of the hole and hole side is carried out slip casting, pile by slurry casting machine and hole side Grouting Pipe after concrete perfusion 2-30 days.
The customary means that slurry casting machine adopts the construction foundation working field in the present embodiment before the Grouting Pipe input pipe 1 that drops into irrigator is with the injected hole shutoff, and described customary means is meant earlier and twines with adhesive tape, twines with glass tape again, fixes with thin wire at last, tightens.
The specific embodiment two: what present embodiment and the specific embodiment one were different is: completing steps five, before the execution in step six, in slurry casting machine, inject water in the 24-48 behind concrete perfusion hour, and open the slip casting passage.So design is sent into Grouting Pipe at the bottom of the hole in the original soil layer accurately, the punching of water elder generation, and required hydraulic pressure is also less, can not hurt sb.'s feelings and splitting concrete pile body, and can guarantee loosened soil and primitive soil at the bottom of the reinforced hole accurately.
The specific embodiment three: present embodiment is described in conjunction with Fig. 2, being used to of present embodiment realized the technical scheme one of center poured post-grouting pile construction methods and the irrigator that uses, this irrigator is by Grouting Pipe input pipe 1, rubble drops into guide plate 2 and elephant trunk 3 is formed, have two notch 1-1 on the tube wall of described Grouting Pipe input pipe 1 from top to bottom, described rubble drops on the outer wall that guide plate 2 is fixedly mounted on Grouting Pipe input pipe 1 and is corresponding with any one the notch 1-1 among two notch 1-1, and described elephant trunk 3 is fixedly mounted on the outer wall of Grouting Pipe input pipe 1 and is corresponding with vacant notch 1-1 among two notch 1-1.
The specific embodiment four: in conjunction with Fig. 2 present embodiment is described, the elephant trunk 3 of present embodiment is the curved pipe of convex song.So the concrete smooth delivery of power is convenient in design.Other composition is identical with the specific embodiment three with annexation.
The specific embodiment five: present embodiment is described in conjunction with Fig. 3, being used to of present embodiment realized the technical scheme one of center poured post-grouting pile construction methods and the slurry casting machine that uses, described slurry casting machine comprises hole-bottom slurry-injection pipe 19, and described slurry casting machine also comprises suspension ring 17, nut 18, pressure ring 20, sealing point 22 and retaining mud steel loop 23; The outer wall of the upper end of described hole-bottom slurry-injection pipe 19 is provided with the screw thread that length G is 30-50mm, described nut 18 is threaded with the upper end of hole-bottom slurry-injection pipe 19, described suspension ring 17 are fixedly mounted on the upper surface of nut 18, described sealing point 22 is fixedly mounted on the lower surface of hole-bottom slurry-injection pipe 19, sealing point 22 lower port that are used to seal hole-bottom slurry-injection pipe 19, described retaining mud steel loop 23 is fixedly mounted on the outer wall of hole-bottom slurry-injection pipe 19, and the lower surface of retaining mud steel loop 23 is 50-300mm to the distance L of sharp 22 lower ends of sealing, described pressure ring 20 is fixedly mounted on the outer wall of hole-bottom slurry-injection pipe 19, and the lower surface of pressure ring 20 is 150-200mm to the upper surface that keeps off mud steel loop 23 apart from K, evenly has a plurality of injected hole 19-1 on the hole-bottom slurry-injection pipe 19 between described retaining mud steel loop 23 and the pressure ring 20.
The specific embodiment six: in conjunction with Fig. 3 present embodiment is described, the thickness of the retaining mud steel loop 23 of present embodiment is 10-14mm, the thickness 15-20mm of pressure ring 20.So design, anti-backstop mud steel loop 23 and pressure ring 20 distortion.Other composition is identical with the specific embodiment five with annexation.
The specific embodiment seven: in conjunction with Fig. 3 present embodiment is described, the slurry casting machine of present embodiment also comprises many reinforcing bars 21, is connected by many reinforcing bars 21 between described retaining mud steel loop 23 and the pressure ring 20.So design has increased the intensity of keeping off mud steel loop 23 and pressure ring 20, and more effective anti-backstop mud steel loop 23 and pressure ring 20 distortion increase the protection to injected hole.Other composition is identical with the specific embodiment five or six with annexation.
The specific embodiment eight: the center poured post-grouting pile construction methods of present embodiment is achieved in that step 1: the stake point of steel pipe to last stake site, is sunk to the design hole depth by vibration or hammering or static pressure with steel pipe; Step 2: descending reinforcing cage, hole side Grouting Pipe is directly installed on the reinforcing cage, together is lowered in the steel pipe with reinforcing cage; Step 3:, deliver to the steel pipe bottom with the feeding port that slurry casting machine is opened by steel pipe upper port or steel pipe upper end side; Step 4: with the feeding port that rubble is opened by steel pipe upper port or steel pipe upper end side, deliver to the steel pipe bottom, the rubble input highly is 0.5-1m; Step 5: after dropping into rubble, the feeding port of opening by steel pipe upper port or steel pipe upper end side to pouring concrete within steel pipe to designing the top mark height; Step 6: promote steel pipe to ground, slurry casting machine is stayed in the hole; Step 7: respectively at the bottom of the hole and hole side is carried out slip casting, pile by slurry casting machine and hole side Grouting Pipe after concrete perfusion 2-30 days.
The customary means that slurry casting machine adopts the construction foundation working field in the present embodiment before dropping into steel pipe is with the injected hole shutoff, and described customary means is meant earlier and twines with adhesive tape, twines with glass tape again, fixes with thin wire at last, tightens.
The stake point of present embodiment is flapper-type or precast pile tip, and flapper-type stake point proposes ground together with steel pipe, and is reusable; The different steel pipes of precast pile tip propose ground together, stay in the hole not reproducible use.
The specific embodiment nine: what present embodiment and the specific embodiment eight were different is: completing steps six, before the execution in step seven, in slurry casting machine, inject water in the 24-48 behind concrete perfusion hour, and open the slip casting passage.So design is sent into Grouting Pipe at the bottom of the hole in the original soil layer accurately, the punching of water elder generation, and required hydraulic pressure is also less, can not hurt sb.'s feelings and splitting concrete pile body, and can guarantee loosened soil and primitive soil at the bottom of the reinforced hole accurately.
The specific embodiment ten: present embodiment is described in conjunction with Fig. 3, being used to of present embodiment realized the technical scheme two of center poured post-grouting pile construction methods and the slurry casting machine that uses, described slurry casting machine comprises hole-bottom slurry-injection pipe 19, and described slurry casting machine also comprises suspension ring 17, nut 18, pressure ring 20, sealing point 22 and retaining mud steel loop 23; The outer wall of the upper end of described hole-bottom slurry-injection pipe 19 is provided with the screw thread that length G is 30-50mm, described nut 18 is threaded with the upper end of hole-bottom slurry-injection pipe 19, described suspension ring 17 are fixedly mounted on the upper surface of nut 18, described sealing point 22 is fixedly mounted on the lower surface of hole-bottom slurry-injection pipe 19, sealing point 22 lower port that are used to seal hole-bottom slurry-injection pipe 19, described retaining mud steel loop 23 is fixedly mounted on the outer wall of hole-bottom slurry-injection pipe 19, and the lower surface of retaining mud steel loop 23 is 50-300mm to the distance L of sharp 22 lower ends of sealing, described pressure ring 20 is fixedly mounted on the outer wall of hole-bottom slurry-injection pipe 19, and the lower surface of pressure ring 20 is 150-200mm to the upper surface that keeps off mud steel loop 23 apart from K, evenly has a plurality of injected hole 19-1 on the hole-bottom slurry-injection pipe 19 between described retaining mud steel loop 23 and the pressure ring 20.
The specific embodiment 11: in conjunction with Fig. 3 present embodiment is described, the thickness of the retaining mud steel loop 23 of present embodiment is 10-14mm, the thickness 15-20mm of pressure ring 20.So design, anti-backstop mud steel loop 23 and pressure ring 20 distortion.Other composition is identical with the specific embodiment ten with annexation.
The specific embodiment 12: in conjunction with Fig. 3 present embodiment is described, the slurry casting machine of present embodiment also comprises many reinforcing bars 21, is connected by many reinforcing bars 21 between described retaining mud steel loop 23 and the pressure ring 20.So design has increased intensity, more effective anti-backstop mud steel loop 23 and pressure ring 20 distortion of retaining mud steel loop 23 and pressure ring 20.Other composition is identical with the specific embodiment ten or 11 with annexation.
The specific embodiment 13: the technical scheme three of the center poured post-grouting pile construction methods of present embodiment: this job practices is achieved in that step 1: drilling tool is drilled into the design hole depth to last stake site; Step 2: carry drilling tool to ground, pass through the core pipe concrete perfusion of drilling tool simultaneously to ground; Step 3: descending reinforcing cage, the sidewall Grouting Pipe is directly installed on the reinforcing cage, together is lowered in the concrete with reinforcing cage; Step 4: slurry casting machine is sent in the hole, and guaranteed that the bottom of slurry casting machine is positioned at end 0.3-1m place under the hole; Step 5: Grouting Pipe is escorted device mention ground, the hole-bottom slurry-injection pipe of slurry casting machine is stayed in the hole; Step 6: respectively at the bottom of the hole and hole side is carried out slip casting, pile by slurry casting machine and hole side Grouting Pipe after concrete perfusion 2-30 days.
The preceding customary means that adopts the construction foundation working field is with the injected hole shutoff in sending into the hole for slurry casting machine in the present embodiment, and described customary means is meant and adopts film to twine shutoff.
The specific embodiment 14: what present embodiment and the specific embodiment 13 were different is: completing steps five, before the execution in step six, in slurry casting machine, inject water in the 24-48 behind concrete perfusion hour, and open the slip casting passage.So design is sent into Grouting Pipe at the bottom of the hole in the original soil layer accurately, the punching of water elder generation, and required hydraulic pressure is also less, can not hurt sb.'s feelings and splitting concrete pile body, and can guarantee loosened soil and primitive soil at the bottom of the reinforced hole accurately.
The specific embodiment 15: what present embodiment and the specific embodiment 13 were different is: slurry casting machine is to adopt artificial downpressure or mechanical oscillation downpressure to send in the hole in the step 4.So design: be because with manually press down or the mechanical oscillation downpressure under slurry casting machine, power is vertically downward, does not have rotation phenomenon to produce, and injected hole is protected the minimum that influences of thing; Again because Grouting Pipe is added with round steel pipe outward, downforce is the bottom that acts on Grouting Pipe by round steel pipe and pressure ring, therefore Grouting Pipe can not produce bending and modification, and this kind mode is lower to the requirement of strength of whole slurry casting machine, tackling slurry casting machine and slurry casting machine mutually, to escort the Materials And Process Requirement of device also low, the cost cost is also very low relatively, can guarantee grouting quality.
The specific embodiment 16: present embodiment is described in conjunction with Fig. 4 and Fig. 5, being used to of present embodiment realized the technical scheme three of center poured post-grouting pile construction methods and the slurry casting machine that uses, described slurry casting machine escorts device by slurry casting machine main body and Grouting Pipe to be formed, and described slurry casting machine main body comprises suspension ring 17, nut 18, hole-bottom slurry-injection pipe 19, pressure ring 20, sealing point 22 and retaining mud steel loop 23; Described Grouting Pipe is escorted device by hook 25 with escort device main body 26 and form, the outer wall of the upper end of described hole-bottom slurry-injection pipe 19 is provided with the screw thread that length G is 30-50mm, described nut 18 is threaded with the upper end of hole-bottom slurry-injection pipe 19, described suspension ring 17 are fixedly mounted on the upper surface of nut 18, described sealing point 22 is fixedly mounted on the lower surface of hole-bottom slurry-injection pipe 19, sealing point 22 lower port that are used to seal hole-bottom slurry-injection pipe 19, described retaining mud steel loop 23 is fixedly mounted on the outer wall of hole-bottom slurry-injection pipe 19, and the lower surface of retaining mud steel loop 23 is 50-300mm to the distance L of sharp 22 lower ends of sealing, described pressure ring 20 is fixedly mounted on the outer wall of hole-bottom slurry-injection pipe 19, and the lower surface of pressure ring 20 is 150-200mm to the upper surface that keeps off mud steel loop 23 apart from K, evenly have a plurality of injected hole 19-1 on the hole-bottom slurry-injection pipe 19 between described retaining mud steel loop 23 and the pressure ring 20, described hook 25 is fixedly mounted on the inwall that escorts device main body 26 upper ends, escort device main body 26 and be sleeved on slurry casting machine main body upper end, the lower end of escorting device main body 26 is against on the upper surface of pressure ring 20, and described suspension ring 17 hang on the hook 25.
The specific embodiment 17: in conjunction with Fig. 4 present embodiment is described, the thickness of the retaining mud steel loop 23 of present embodiment is 10-14mm, the thickness 15-20mm of pressure ring 20.So design, anti-backstop mud steel loop 23 and pressure ring 20 distortion.Other composition is identical with the specific embodiment 16 with annexation.
The specific embodiment 18: in conjunction with Fig. 4 present embodiment is described, the slurry casting machine main body of present embodiment also comprises many reinforcing bars 21, is connected by many reinforcing bars 21 between described retaining mud steel loop 23 and the pressure ring 20.So design has increased intensity, more effective anti-backstop mud steel loop 23 and pressure ring 20 distortion of retaining mud steel loop 23 and pressure ring 20.Other composition is identical with the specific embodiment 16 or 17 with annexation.
The specific embodiment 19: in conjunction with Fig. 5 present embodiment is described, the device main body 26 of escorting of present embodiment is made by round steel pipe, and the internal diameter of round steel pipe is than the big 30-50mm of external diameter of hole-bottom slurry-injection pipe 19.So design is convenient to regulate the slurry casting machine main body and the position of escorting between the device main body 26 concerns.Other composition is identical with the specific embodiment 16,17 or 18 with annexation.
The specific embodiment 20: in conjunction with Fig. 5 present embodiment is described, it is 500-1000mm that the axis direction of the round steel tube wall upper edge round steel pipe at the 200mm place, distance circle steel pipe upper surface of present embodiment has length J, and width D is the gap 26-1 of 20-50mm.So design is convenient to regulate the slurry casting machine main body and the position of escorting between the device main body 26 concerns.Other composition is identical with the specific embodiment 19 with annexation.
The specific embodiment 21: the technical scheme four of the center poured post-grouting pile construction methods of present embodiment: this job practices is achieved in that step 1: drilling tool is to last stake site, and boring is to designing hole depth; Step 2: with slurry casting machine by irrigator Grouting Pipe input pipe and at the bottom of the core pipe of drilling tool delivers to the hole; Step 3: by pump concrete is delivered in the elephant trunk of irrigator, and simultaneously drilling tool is carried to ground to ground by concrete perfusion in the core Guan Xiangkong of drilling tool, slurry casting machine is stayed in the hole; Step 5: descending reinforcing cage, hole side Grouting Pipe is directly installed on the reinforcing cage, together is lowered in the concrete with reinforcing cage, injects water in the 24-48 behind concrete perfusion hour in slurry casting machine, opens the slip casting passage; Step 6: respectively at the bottom of the hole and hole side is carried out slip casting, pile by slurry casting machine and hole side Grouting Pipe after concrete perfusion 2-30 days.

Claims (5)

1. center poured post-grouting pile construction methods, it is characterized in that: this job practices is achieved in that
Step 1: drilling tool is to last stake site, and boring is to designing hole depth;
Step 2: with slurry casting machine by irrigator Grouting Pipe input pipe and at the bottom of the core pipe of drilling tool delivers to the hole;
Step 3: the core pipe that the rubble of rubble by irrigator dropped into guide plate and drilling tool is delivered at the bottom of the hole, and the rubble input highly is 0.5-1m;
Step 4: when promoting drilling tool when dropping into rubble to 1/2 place of rubble input height, concrete is delivered in the elephant trunk of irrigator by pump, and concrete perfusion is carried drilling tool to ground simultaneously to ground in the core Guan Xiangkong by drilling tool, and slurry casting machine is stayed in the hole;
Step 5: descending reinforcing cage, hole side Grouting Pipe is directly installed on the reinforcing cage, together is lowered in the concrete with reinforcing cage;
Step 6: respectively at the bottom of the hole and hole side is carried out slip casting, pile by slurry casting machine and hole side Grouting Pipe after concrete perfusion 2-30 days;
The irrigator that is used for the center poured post-grouting pile construction methods and uses is by Grouting Pipe input pipe (1), rubble drops into guide plate (2) and elephant trunk (3) is formed, have two notches (1-1) on the tube wall of described Grouting Pipe input pipe (1) from top to bottom, described rubble drops on the outer wall that guide plate (2) is fixedly mounted on Grouting Pipe input pipe (1) and is corresponding with any one notch (1-1) in two notches (1-1), and described elephant trunk (3) is fixedly mounted on the outer wall of Grouting Pipe input pipe (1) and is corresponding with vacant notch (1-1) in two notches (1-1);
The slurry casting machine that is used for the center poured post-grouting pile construction methods and uses comprises hole-bottom slurry-injection pipe (19), and described slurry casting machine also comprises suspension ring (17), nut (18), pressure ring (20), many reinforcing bars (21), sealing point (22) and retaining mud steel loop (23); The outer wall of the upper end of described hole-bottom slurry-injection pipe (19) is provided with length (G) and is the screw thread of 30-50mm, described nut (18) is threaded with the upper end of hole-bottom slurry-injection pipe (19), described suspension ring (17) are fixedly mounted on the upper surface of nut (18), described sealing point (22) is fixedly mounted on the lower surface of hole-bottom slurry-injection pipe (19), described retaining mud steel loop (23) is fixedly mounted on the outer wall of hole-bottom slurry-injection pipe (19), and the lower surface of retaining mud steel loop (23) is 50-300mm to the distance (L) of sealing point (22) lower end, described pressure ring (20) is fixedly mounted on the outer wall of hole-bottom slurry-injection pipe (19), and the lower surface of pressure ring (20) is 150-200mm to the distance (K) of the upper surface of retaining mud steel loop (23), evenly have a plurality of injected holes (19-1) on the hole-bottom slurry-injection pipe (19) between described retaining mud steel loop (23) and the pressure ring (20), be connected by many reinforcing bars (21) between described retaining mud steel loop (23) and the pressure ring (20).
2. according to the described center of claim 1 poured post-grouting pile construction methods, it is characterized in that: completing steps five, before the execution in step six, in slurry casting machine, inject water in the 24-48 behind concrete perfusion hour, open the slip casting passage.
3. center poured post-grouting pile construction methods, it is characterized in that: this job practices is achieved in that
Step 1: the stake point of steel pipe to last stake site, is sunk to the design hole depth by vibration or hammering or static pressure with steel pipe;
Step 2: descending reinforcing cage, hole side Grouting Pipe is directly installed on the reinforcing cage, together is lowered in the steel pipe with reinforcing cage;
Step 3:, deliver to the steel pipe bottom with the feeding port that slurry casting machine is opened by steel pipe upper port or steel pipe upper end side;
Step 4: with the feeding port that rubble is opened by steel pipe upper port or steel pipe upper end side, deliver to the steel pipe bottom, the rubble input highly is 0.5-1m;
Step 5: after dropping into rubble, the feeding port of opening by steel pipe upper port or steel pipe upper end side to pouring concrete within steel pipe to designing the top mark height;
Step 6: promote steel pipe to ground, slurry casting machine is stayed in the hole;
Step 7: respectively at the bottom of the hole and hole side is carried out slip casting, pile by slurry casting machine and hole side Grouting Pipe after concrete perfusion 2-30 days;
The slurry casting machine that is used for the center poured post-grouting pile construction methods and uses comprises hole-bottom slurry-injection pipe (19), and described slurry casting machine also comprises suspension ring (17), nut (18), pressure ring (20), many reinforcing bars (21), sealing point (22) and retaining mud steel loop (23); The outer wall of the upper end of described hole-bottom slurry-injection pipe (19) is provided with length (G) and is the screw thread of 30-50mm, described nut (18) is threaded with the upper end of hole-bottom slurry-injection pipe (19), described suspension ring (17) are fixedly mounted on the upper surface of nut (18), described sealing point (22) is fixedly mounted on the lower surface of hole-bottom slurry-injection pipe (19), described retaining mud steel loop (23) is fixedly mounted on the outer wall of hole-bottom slurry-injection pipe (19), and the lower surface of retaining mud steel loop (23) is 50-300mm to the distance (L) of sealing point (22) lower end, described pressure ring (20) is fixedly mounted on the outer wall of hole-bottom slurry-injection pipe (19), and the lower surface of pressure ring (20) is 150-200mm to the distance (K) of the upper surface of retaining mud steel loop (23), evenly have a plurality of injected holes (19-1) on the hole-bottom slurry-injection pipe (19) between described retaining mud steel loop (23) and the pressure ring (20), be connected by many reinforcing bars (21) between described retaining mud steel loop (23) and the pressure ring (20).
4. according to the described center of claim 3 poured post-grouting pile construction methods, it is characterized in that: completing steps six, before the execution in step seven, in slurry casting machine, inject water in the 24-48 behind concrete perfusion hour, open the slip casting passage.
5. slurry casting machine that is used to realize the center poured post-grouting pile construction methods and uses, described center poured post-grouting pile construction methods is achieved in that step 1: drilling tool is drilled into the design hole depth to last stake site; Step 2: carry drilling tool to ground, pass through the core pipe concrete perfusion of drilling tool simultaneously to ground; Step 3: descending reinforcing cage, the sidewall Grouting Pipe is directly installed on the reinforcing cage, together is lowered in the concrete with reinforcing cage; Step 4: slurry casting machine is sent in the hole, and guaranteed that the bottom of slurry casting machine is positioned at end 0.3-1m place under the hole; Step 5: Grouting Pipe is escorted device mention ground, the hole-bottom slurry-injection pipe of slurry casting machine is stayed in the hole; Step 6: respectively at the bottom of the hole and hole side is carried out slip casting, pile by slurry casting machine and hole side Grouting Pipe after concrete perfusion 2-30 days; It is characterized in that: described slurry casting machine escorts device by slurry casting machine main body and Grouting Pipe to be formed, and described slurry casting machine main body is made up of suspension ring (17), nut (18), hole-bottom slurry-injection pipe (19), pressure ring (20), many reinforcing bars (21), sealing point (22) and retaining mud steel loop (23); Described Grouting Pipe is escorted device by linking up with (25) and escorting device main body (26) and form, the outer wall of the upper end of described hole-bottom slurry-injection pipe (19) is provided with length (G) and is the screw thread of 30-50mm, described nut (18) is threaded with the upper end of hole-bottom slurry-injection pipe (19), described suspension ring (17) are fixedly mounted on the upper surface of nut (18), described sealing point (22) is fixedly mounted on the lower surface of hole-bottom slurry-injection pipe (19), described retaining mud steel loop (23) is fixedly mounted on the outer wall of hole-bottom slurry-injection pipe (19), and the lower surface of retaining mud steel loop (23) is 50-300mm to the distance (L) of sealing point (22) lower end, described pressure ring (20) is fixedly mounted on the outer wall of hole-bottom slurry-injection pipe (19), and the lower surface of pressure ring (20) is 150-200mm to the distance (K) of the upper surface of retaining mud steel loop (23), evenly have a plurality of injected holes (19-1) on the hole-bottom slurry-injection pipe (19) between described retaining mud steel loop (23) and the pressure ring (20), be connected by many reinforcing bars (21) between described retaining mud steel loop (23) and the pressure ring (20), described hook (25) is fixedly mounted on the inwall that escorts device main body (26) upper end, escort device main body (26) and be sleeved on slurry casting machine main body upper end, the lower end of escorting device main body (26) is against on the upper surface of pressure ring (20), and described suspension ring (17) hang on the hook (25).
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CN103114576A (en) * 2013-02-05 2013-05-22 山西太行建设开发有限公司 Post grouting construction method for cast-in-place concrete pile
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