CN103386709A - Shakeproof lift-preventing anti-bending preformed pile and manufacturing process of preformed pile - Google Patents
Shakeproof lift-preventing anti-bending preformed pile and manufacturing process of preformed pile Download PDFInfo
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- CN103386709A CN103386709A CN2013103157880A CN201310315788A CN103386709A CN 103386709 A CN103386709 A CN 103386709A CN 2013103157880 A CN2013103157880 A CN 2013103157880A CN 201310315788 A CN201310315788 A CN 201310315788A CN 103386709 A CN103386709 A CN 103386709A
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Abstract
The invention relates to a shakeproof lift-preventing anti-bending preformed pile and a manufacturing process of the preformed pile. The preformed pile is characterized by comprising a plurality of prestress main bars, concrete, end plates on both sides and circular truncated cones matched with the prestress main bars, wherein the prestress main bars are uniformly arranged in the preformed pile, and adjacent prestress main bars encircle a circle through stirrups. The concrete is filled around the prestress main bars and the stirrups to form the preformed pile. The end plates are provided with through holes threaded with the prestress main bars which pass through the through holes on the end plates and are matched and connected with the circular truncated cones arranged on the other sides of the end plates. The invention provides the novel preformed pile and the manufacturing process thereof. Demands such as connection and piling of piles are realized through special connectors. The preformed pile has the advantages that the performed pile is simple in structure, convenient to operate and quick to construct, and the preformed piles can be firmly and accurately connected, so that the work efficiency is greatly improved, and the performed pile is labor-saving and the like.
Description
Technical field
The present invention relates to a kind of shockproof resistance to plucking bending resistance prefabricated pile and prefabricated pile manufacture craft.
Background technology
Along with the city great development, economic construction speed improves, and various buildings or structures constantly stand in city, in building height towards in more and more higher development, pile foundation, because of its excellent performance, is generally applied in high-rise and high-rise buildings or structures.The length of pile foundation king-pile also constantly is lengthened out, yet for prefabricated pile, due to the length of vehicle and the restriction of the on-the-spot piling machine height of driving piles in transportation, the prefabricated pile of factory can not be done longly, greater than 20 meters the time, its transportation and piling will become very difficult when the length of single prefabricated pile.So when the length of prefabricated pile does not meet design requirement, pile extension just need to be carried out to many prefabricated piles according to actual conditions in job site, traditional preformed pile connecting method is mainly the sulphide mastic bonding and is welded to connect, develops now the most ripe, most widely used as to be to be welded to connect.But be welded to connect and also have all inconvenience, can't overcome.At first, when prefabricated pile is welded to connect weld interval longer, start until weld seam is naturally cooling from welding, omnidistance probably need to 30 minutes, can continue pile sinking afterwards, influential to construction speed; Secondly, be welded to connect welder's specification requirement higher, welder technology just determines the quality of welding quality, and then determined the quality of whole pile, this situation that weld bending resistance and tensile strength are lower probably occurs, connect with welding has certain risk with uncertain to the prefabricated pile pile quality; Moreover, weld affected by environment greatlyr, can not construct in the rainy day, greatly affect construction speed.
Traditional connected mode is not only having uncertain factor qualitatively, also restriction to some extent on the scope of application.Higher and the earthquake zone that takes place frequently for level of ground water, prefabricated pile is in loose sand and silt, the soil body is issued to saturation state in the effect of underground water, and when the effect that runs into earthquake, the pore water pressure that suddenly rises has little time to dissipate, according to the Tai Shaji principle of effective stress, when effective stress dropped to zero, loose sand and silt can completely lose bearing capacity and shearing strength, are suspended state, become liquid the same, this is the liquefaction of soil.In such cases, even entered bedrock surface at the bottom of the prefabricated pile stake, the soil body and the underground water of liquefaction provide the powerful buoyancy that must make progress to prefabricated pile on every side, make the effect of prefabricated pile under tension.And earthquake occurs the time, P-wave (compressional wave) in communication process, it can make through zone produce up-down vibration, if prefabricated pile in this section zone, pile body will up-down vibration, the junction of two piles is exactly weak link, may vibrate and come off.Under liquefaction of soil mass, underground water and P-wave multiple action, many prefabricated piles that are weldingly connected, it bears buoyancy (pulling force) and vertical tremor effect, and the welding quality between prefabricated pile just seems particularly important this moment.And general prefabricated pile mainly bears pressure-acting, even welding quality meets General Requirements, but in such cases, the position that very likely causes two prefabricated pile end plate welding, weld seam appearance is split, make the globality of stake be subject to strong effect, to such an extent as to can cause prefabricated pile come off floating and the floating of surface structures or subside, serious harm building safety and people's lives and properties.
Summary of the invention
, for the problem that exists in existing technique, the object of the present invention is to provide the technical scheme of a kind of shockproof resistance to plucking bending resistance prefabricated pile and prefabricated pile manufacture craft.
described a kind of shockproof resistance to plucking bending resistance prefabricated pile, this prefabricated pile is hollow structure, the prefabricated pile top arranges the top connector, the prefabricated pile bottom arranges the bottom connector, between adjacent prefabricated pile, transition piece is set, during piling, the prefabricated pile top arranges the piling connector, it is characterized in that comprising some prestressing force master muscle, concrete, the end plate of both sides and the round platform that matches with prestressing force master muscle, described prestressing force master muscle evenly is arranged in prefabricated pile, adjacent prestressing force master muscle surrounds circle by stirrup, described Concrete Filled forms prefabricated pile around prestressing force master muscle and stirrup, be provided with the through hole of cross-under prestressing force master muscle on described end plate, prestressing force master muscle passes through hole on end plate and the round platform of end plate opposite side setting is connected.
Described a kind of shockproof resistance to plucking bending resistance prefabricated pile, is characterized in that described prestressing force master muscle two ends are provided with external screw thread, and described round platform arranges internal thread, and prestressing force master muscle and round platform are by external screw thread and internal thread threaded.
Described a kind of shockproof resistance to plucking bending resistance prefabricated pile, is characterized in that described internal thread is arranged on the large end of round platform, is provided with annular groove on the circumference of round platform small end.
Described a kind of shockproof resistance to plucking bending resistance prefabricated pile, it is characterized in that described top connector is the circular steel plate that an end face arranges solid hemisphere, described solid hemisphere is arranged on the center of circular steel plate, circular steel plate arranges on solid hemisphere circumference simultaneously the first groove that some and described round platform matches is set, and on described solid hemisphere body, the second groove is set; Be provided with a plurality of the first stopper slots on the inner periphery of described the first groove and the second groove, the first spacer pin and the first spring are set in the first stopper slot, the first spring is arranged in the first stopper slot, the first spacer pin one end is arranged in the first stopper slot and touches and coordinate with the first spring, the first spacer pin other end is given prominence to the first stopper slot, and the inclined-plane of the end face of the first spacer pin of outstanding the first stopper slot for round platform, matching, described the first spacer pin matches with the annular groove of round platform.
Described a kind of shockproof resistance to plucking bending resistance prefabricated pile, it is characterized in that described transition piece is the circular steel plate that two end faces all arrange solid hemisphere, described solid hemisphere is arranged on the center of circular steel plate, on the circumference of circular steel plate both ends of the surface, the 3rd groove that some and described round platform matches is set all, on the solid hemisphere body of both ends of the surface, the 4th groove is set all; Be provided with a plurality of the second stopper slots on the inner periphery of described the 3rd groove and the 4th groove, the second spacer pin and the second spring are set in the second stopper slot, the second spring is arranged in the second stopper slot, the second spacer pin one end is arranged in the second stopper slot and touches and coordinate with the second spring, the second spacer pin other end is given prominence to the second stopper slot, and the inclined-plane of the end face of the second spacer pin of outstanding the second stopper slot for round platform, matching, described the second spacer pin matches with the annular groove of round platform.
described a kind of shockproof resistance to plucking bending resistance prefabricated pile, it is characterized in that described piling connector is bolted and is formed by upper arm-tie and lower pulling plate, on the overall structure of upper arm-tie and lower pulling plate formation, the 5th groove that matches with round platform is set, be provided with a plurality of the 3rd stopper slots on the inner periphery of the 5th groove, the 3rd spacer pin and the 3rd spring are set in the 3rd stopper slot, the 3rd spring is arranged in the 3rd stopper slot, the 3rd spacer pin one end is arranged in the 3rd stopper slot and touches and coordinate with the 3rd spring, the 3rd spacer pin other end is given prominence to the 3rd stopper slot, and the inclined-plane of the end face of the 3rd spacer pin of outstanding the 3rd stopper slot for round platform, matching, described the 3rd stopper slot is arranged on the junction of arm-tie and lower pulling plate, and the 3rd spacer pin matches with the annular groove of round platform.
Described a kind of shockproof resistance to plucking bending resistance prefabricated pile, it is characterized in that described bottom connector is that an end face arranges solid hemisphere, an end face and is arranged to the steel plate of taper, described solid hemisphere is arranged on the center of steel plate, steel plate arranges on solid hemisphere circumference simultaneously the 6th groove that some and described round platform matches is set, and on described solid hemisphere body, the 7th groove is set; Be provided with a plurality of the 4th stopper slots on the inner periphery of described the 6th groove and the 7th groove, the 4th spacer pin and the 4th spring are set in the 4th stopper slot, the 4th spring is arranged in the 4th stopper slot, the 4th spacer pin one end is arranged in the 4th stopper slot and touches and coordinate with the 4th spring, the 4th spacer pin other end is given prominence to the 4th stopper slot, and the inclined-plane of the end face of the 4th spacer pin of outstanding the 4th stopper slot for round platform, matching, described the 4th spacer pin matches with the annular groove of round platform.
The manufacture craft of described a kind of shockproof resistance to plucking bending resistance prefabricated pile is characterized in that comprising the following steps:
1) concrete for making: make the fresh concrete of the low slump of 4～6cm with the concrete forced mixer, strength grade of concrete is not less than C60 or C80;
2) prestressing force master muscles and bones frame is made: prestressing force master muscle adopts the prestressed concrete reinforcing steel of low loose type, need accurate fixed-length, cut-out and at prestressing force master muscle two ends, make and be connected the external screw thread that adapts with round platform, internal thread is set in round platform, the setting that is spirally connected of prestressing force master muscle and round platform, at prestressing force master muscle circumference, stirrup is set, stirrup adopts the low-carbon (LC) cold drawn wire of 4mm～6mm, and stirrup and circular prestressing force master muscles and bones frame adopt automatic welding machined or artificial welding;
3) end plate is made: end plate is circular, and the through hole of cross-under prestressing force master muscle is arranged on plate, and through-hole diameter is greater than prestressing force master muscle diameter; Step 2) threaded is carried out with round platform after inserting end plate with externally threaded prestressing force master muscle in the two ends of making in;
4) the piling connector is made: the piling connector is bolted and is formed by upper arm-tie and lower pulling plate, on the overall structure of upper arm-tie and lower pulling plate formation, the 5th groove that matches with round platform is set, be provided with a plurality of the 3rd stopper slots on the inner periphery of the 5th groove, the 3rd spacer pin and the 3rd spring are set in the 3rd stopper slot, the 3rd spring is arranged in the 3rd stopper slot, the 3rd spacer pin one end is arranged in the 3rd stopper slot and touches and coordinate with the 3rd spring, the 3rd spacer pin other end is given prominence to the 3rd stopper slot, and the inclined-plane of the end face of the 3rd spacer pin of outstanding the 3rd stopper slot for round platform, matching, the 3rd stopper slot is arranged on the junction of arm-tie and lower pulling plate, the 3rd spacer pin matches with the annular groove of round platform, when round platform inserts the 5th groove, the 3rd spring promotes the 3rd spacer pin, the 3rd spacer pin is pushed annular groove in round platform, with round platform lock jail, form because arm-tie and lower pulling plate on this piling connector are bolted, remove bolt, can unload arm-tie and lower pulling plate, expose the 3rd spring and the 3rd spacer pin, stir the 3rd spring, round platform and the 3rd spacer pin are broken away from, expose the prefabricated pile with round platform, upper arm-tie center is provided with screw thread, is used for tension rod is installed, and tension rod is connected with stretching machine, round platform on the prestressing force master muscle of making in step 3) is inserted the 5th groove,
5) prestressed master muscles and bones frame: the prestressing force master muscle that has connected the piling connector in step 4) is positioned in the lower mold half of centrifugal prefabricated pile, and the upper arm-tie of a side is connected with tension rod, and tension rod stretches out outside mould;
6) concrete distributing: by the consumption requirement of every centrifugal prefabricated pile, the fresh concrete of making in step 1) is evenly filled up the lower mold half of step 5) along mould, stretch-draw one some concrete of the many cloth of end;
7) matched moulds: the prefabricated pile upper mold half is winched to lower mold half top, with fastening bolt, the up and down mold halves is fixedly connected with, make end plate and piling connector all at mould inside, and guarantee mould loosening and concrete running pulp not in the high speed centrifugation operation process;
8) prestressed stretch-draw: jack is connected with the tension rod of stretching, and the centrifugal prefabricated pile prestressing force master muscles and bones frame after matched moulds is carried out stretch-draw, and stretch-draw after some strength, is fixed on tension rod on mould with big nut;
9) centrifugal treating: the mold hoisting after stretch-draw anchor in step 8) to centrifuge top is accelerated step by step,, by centrifugal closely knit moulding process, make fresh concrete evenly closely knit along centrifugal prefabricated pile mould surrounding, simultaneously the inner cavity that forms of prefabricated pile;
10) maintenance: band mould prefabricated pile after centrifugal forming is winched in the steam curing pond, and under normal pressure, maintenance is 4～8 hours, makes concrete strength reach requirement;
11) demoulding: the band mould prefabricated pile after maintenance is winched on special-purpose demoulding platform position, fastening bolt is shed, hang away upper mold half, stir lower mold half, shed tension rod, remove the bolt on the piling connector, upper arm-tie separates with lower pulling plate, outwards stir the 3rd spring, round platform and the 3rd spacer pin are broken away from, expose the prefabricated pile with round platform; To finished product stockyard Ma Dui, natural curing, can dispatch from the factory after reaching the intensity of dispatching from the factory with the direct handling of the prefabricated pile after the demoulding.
The present invention proposes a kind of precast pile and manufacture craft thereof, and by special-purpose connector realize stake be connected and the demand such as piling, it has simple in structure, easy to operate, construction fast, can accurately connect prefabricated pile securely, significantly increase work efficiency, the advantage such as save labor.The present invention can not only use in common stratum and zone, bringing into play it installs convenient quick, overcome the impact of weather unfavorable factor, during connection, the pile body centering is good, has higher resistance to plucking anti-bending strength, especially, to earthquake and the higher zone of level of ground water, adopt connector of the present invention to connect, the more aobvious excellence of its antidetonation anti-floating anti-bending strength.
Description of drawings
Fig. 1 is the structural representation of prefabricated pile;
Fig. 2 is the structural representation that prefabricated pile is made mould;
Fig. 3 is the structural representation of top connector;
Fig. 4 is the structural representation of bottom connector;
Fig. 5 is the structural representation of transition piece;
Fig. 6 is the structural representation of piling connector;
Fig. 7 is the structural representation that prestressing force master muscle connects round platform;
Fig. 8 is the structural representation that round platform is connected with spacer pin;
Fig. 9 is the structural representation that is connected with groove on solid hemisphere with the rod iron of round platform;
Figure 10 is the structural representation at pile extension place;
in figure: 1-prestressing force master muscle, the 2-stirrup, the 3-end plate, the 4-round platform, the 5-annular groove, the 6-upper mold half, the 7-lower mold half, the 8-connector of driving piles, 9-the first groove, 10-the second groove, 11-top connector, 12-the first spacer pin, 13-the first spring, 14-the 3rd groove, 15-the 4th groove, the 16-transition piece, 17-the second spacer pin, 18-the second spring, 19-the 5th groove, the solid hemisphere of 20-, 21-the 3rd spacer pin, 22-the 3rd spring, the upper arm-tie of 23-, the 24-lower pulling plate, the 25-bolt, 26-the 6th groove, 27-the 7th groove, 28-bottom connector, 29-the 4th spacer pin, 30-the 4th spring, the 31-rod iron, the 32-curved plate, 33-binds round bar.
The specific embodiment
The present invention will be further described below in conjunction with Figure of description:
A kind of shockproof resistance to plucking bending resistance prefabricated pile, this prefabricated pile is hollow structure, and the prefabricated pile top arranges top connector 11, and the prefabricated pile bottom arranges bottom connector 28, transition piece 16 is set between adjacent prefabricated pile, and during piling, the prefabricated pile top arranges piling connector 8; This prefabricated pile comprises the end plate 3 of some prestressing force master muscle 1, concrete, both sides and the round platform 4 that matches with prestressing force master muscle, prestressing force master muscle 1 evenly is arranged in prefabricated pile, adjacent prestressing force master muscle 1 surrounds circle by stirrup 2, and Concrete Filled forms prefabricated pile around prestressing force master muscle and stirrup; Be provided with the through hole of cross-under prestressing force master muscle on end plate, prestressing force master muscle 1 passes through hole on end plate 3 and the round platform 4 of end plate opposite side setting is connected; Prestressing force master muscle 1 two ends are provided with external screw thread, round platform 4 arranges internal thread, prestressing force master muscle 1 and round platform 4 are by external screw thread and internal thread threaded, its internal thread is arranged on the large end of round platform, be provided with annular groove 5 on the circumference of round platform small end, annular groove 5 is used for coordinating with the spacer pin on connector.
Complete when prefabricated pile piling, the top connector need to be set on the top of prefabricated pile, play the sealing effect.The connected mode of prefabricated pile and top connector is: the round platform on prefabricated pile top is inserted the first stopper slot, the first spacer pin in the first stopper slot matches with the first spring, the first spacer pin is stuck in the annular groove of round platform, realizes that the top connector is connected with the reliable of prefabricated pile.
In the piling process, need to be connected by transition piece between adjacent prefabricated pile, its connected mode is: the end that adjacent prefabricated pile is close inserts respectively the second stopper slot of transition piece both sides, the second spacer pin in the second stopper slot matches with the second spring, the second spacer pin is stuck in the annular groove of contiguous prefabricated stake round platform, realizes transition piece and reliable connection of contiguous prefabricated.
During piling, the prefabricated pile bottom need arrange the bottom connector, connector end face in bottom arranges the 4th stopper slot, match with the 4th spring by the 4th spacer pin in the 4th stopper slot, the 4th spacer pin is stuck in the annular groove of prefabricated pile round platform, realizes that the bottom connector is connected with the reliable of prefabricated pile; And the other end of bottom connector is pyramidal structure, can replace in traditional prefabricated pile piling process the present situation that needs in that side stake end welding pile top of burying; Lower end is that the prefabricated post of pyramidal structure is convenient to enter the soil body, and the bottom connector is connected with the prefabricated pile with round platform, more is of value to the stability that keeps prefabricated pile, increases the globality of pile extension.
During piling, the prefabricated pile top need arrange the piling connector, if independent piling connector is not set, directly pile body is knocked, damage possibly the round platform of pile body or damage pile body end, at that rate, two adjacent prefabricated piles just cannot connect by transition piece, also can't adopt the top connector to seal.Because the piling connector is divided into upper arm-tie and lower pulling plate, and the 3rd stopper slot is arranged on the junction of arm-tie and lower pulling plate, complete when driving piles, as long as pull down the bolt that connects upper arm-tie and lower pulling plate, can unload arm-tie, this moment, the 3rd spacer pin will break away from the annular groove of round platform, can unload lower pulling plate, and the connector of namely driving piles is removed smoothly.After dismounting, can carry out pile extension or the top connector is set sealing by transition piece.
When two prefabricated piles are connected, the threaded rod iron 31 in available termination is connected with round platform 4, afterwards in whole insertion the second groove, the 4th groove or the 7th groove, play a supporting role, also strengthened simultaneously the globality of stake, improve the stretching-resisting bending-resisting performance, be adapted at using in the stratum of operating environment complexity.
When pile extension, can a plurality of curved plates 21 be set in two prefabricated pile junctions of transition piece and up and down, then on curved plate 21 circumference, circular, hoop bar 33 is set, the section of curved plate 32 is thick middle both sides thin structures, is used for strengthening fastness and the stability at pile extension place.
The use of above-mentioned various connectors, greatly strengthened the bending resistance extraction-resistant behavior that prefabricated pile connects, and is applicable to the formation condition complexity, the use under particular surroundings.
The manufacture craft of above-mentioned shockproof resistance to plucking bending resistance prefabricated pile comprises the following steps:
1) concrete for making: make the fresh concrete of the low slump of 4～6cm with the concrete forced mixer, strength grade of concrete is not less than C60 or C80;
2) prestressing force master muscles and bones frame is made: prestressing force master muscle adopts the prestressed concrete reinforcing steel of low loose type, need accurate fixed-length, cut-out and at prestressing force master muscle two ends, make and be connected the external screw thread that adapts with round platform, internal thread is set in round platform, the setting that is spirally connected of prestressing force master muscle and round platform, at prestressing force master muscle circumference, stirrup is set, stirrup adopts the low-carbon (LC) cold drawn wire of 4mm～6mm, and stirrup and circular prestressing force master muscles and bones frame adopt automatic welding machined or artificial welding;
3) end plate is made: end plate is circular, and the through hole of cross-under prestressing force master muscle is arranged on plate, and through-hole diameter is greater than prestressing force master muscle diameter; Step 2) threaded is carried out with round platform after inserting end plate with externally threaded prestressing force master muscle in the two ends of making in;
4) the piling connector is made: the piling connector is bolted and is formed by upper arm-tie and lower pulling plate, on the overall structure of upper arm-tie and lower pulling plate formation, the 5th groove that matches with round platform is set, be provided with a plurality of the 3rd stopper slots on the inner periphery of the 5th groove, the 3rd spacer pin and the 3rd spring are set in the 3rd stopper slot, the 3rd spring is arranged in the 3rd stopper slot, the 3rd spacer pin one end is arranged in the 3rd stopper slot and touches and coordinate with the 3rd spring, the 3rd spacer pin other end is given prominence to the 3rd stopper slot, and the inclined-plane of the end face of the 3rd spacer pin of outstanding the 3rd stopper slot for round platform, matching, the 3rd stopper slot is arranged on the junction of arm-tie and lower pulling plate, the 3rd spacer pin matches with the annular groove of round platform, when round platform inserts the 5th groove, the 3rd spring promotes the 3rd spacer pin, the 3rd spacer pin is pushed annular groove in round platform, with round platform lock jail, form because arm-tie and lower pulling plate on this piling connector are bolted, remove bolt, can unload arm-tie and lower pulling plate, expose the 3rd spring and the 3rd spacer pin, stir the 3rd spring, round platform and the 3rd spacer pin are broken away from, expose the prefabricated pile with round platform, upper arm-tie center is provided with screw thread, is used for tension rod is installed, and tension rod is connected with stretching machine, round platform on the prestressing force master muscle of making in step 3) is inserted the 5th groove,
5) prestressed master muscles and bones frame: the prestressing force master muscle that has connected the piling connector in step 4) is positioned in the lower mold half 7 of centrifugal prefabricated pile, and the upper arm-tie of a side is connected with tension rod, and tension rod stretches out outside mould;
6) concrete distributing: by the consumption requirement of every centrifugal prefabricated pile, the fresh concrete of making in step 1) is evenly filled up the lower mold half 7 of step 5) along mould, stretch-draw one some concrete of the many cloth of end;
7) matched moulds: prefabricated pile upper mold half 6 is winched to lower mold half 7 tops, with fastening bolt, the up and down mold halves is fixedly connected with, make end plate and piling connector all at mould inside, and guarantee mould loosening and concrete running pulp not in the high speed centrifugation operation process;
8) prestressed stretch-draw: jack is connected with the tension rod of stretching, and the centrifugal prefabricated pile prestressing force master muscles and bones frame after matched moulds is carried out stretch-draw, and stretch-draw after some strength, is fixed on tension rod on mould with big nut;
9) centrifugal treating: the mold hoisting after stretch-draw anchor in step 8) to centrifuge top is accelerated step by step,, by centrifugal closely knit moulding process, make fresh concrete evenly closely knit along centrifugal prefabricated pile mould surrounding, simultaneously the inner cavity that forms of prefabricated pile;
10) maintenance: band mould prefabricated pile after centrifugal forming is winched in the steam curing pond, and under normal pressure, maintenance is 4～8 hours, makes concrete strength reach requirement;
11) demoulding: the band mould prefabricated pile after maintenance is winched on special-purpose demoulding platform position, fastening bolt is shed, hang away upper mold half, stir lower mold half, shed tension rod, remove the bolt on the piling connector, upper arm-tie separates with lower pulling plate, outwards stir the 3rd spring, round platform and the 3rd spacer pin are broken away from, expose the prefabricated pile with round platform; To finished product stockyard Ma Dui, natural curing, can dispatch from the factory after reaching the intensity of dispatching from the factory with the direct handling of the prefabricated pile after the demoulding.
Prefabricated pile of the present invention, the stake two ends are with end plate, and end plate is connected with prestressing force master muscle, different with prestressing force master muscle connected mode from traditional end plate, it has abandoned the pier nose form, but adopts round platform, screwed hole is arranged in round platform, and the round platform outer circumference is provided with annular groove.Make the external screw thread that is complementary with round platform at prestressing force master muscle two ends, prestressing force master muscle passes on end plate through hole and with threaded round platform, is connected, and this kind connection has avoided prestressing force master muscle preformed hole and stretch-draw bolt hole on traditional end plate to be all a hole.When being traditional approach, stretch-draw bolt and the effective contact area of end plate have loss (prestressing force master muscle preformed hole be communicated with the stretch-draw bolt hole cause), in jack tension, end plate bears larger pulling force, and bolt and end plate contact area are less, easily produce the stress concentration phenomenon, destroy preformed hole and stretch-draw bolt hole, and then causing that the stretch-draw bolt pulls, the prefabricated pile in may causing making is scrapped.Utilize threaded round platform, can significantly subdue the stress concentration phenomenon at stretch-draw bolt hole place on end plate, reduce the disqualification rate in tensioning process.When prestressing force master muscle passes end plate, and with need stretch-draw to use after threaded round platform is connected, the present invention's tension tool used is the piling connector, and the 3rd stopper slot is connected with round platform, and jack pulls arm-tie, lower pulling plate also passes through interlink function, prestressing force master muscle is implemented stretch-draw, after stretch-draw is completed and is passed through the centrifugal action moulding, just detachable upper arm-tie, lower pulling plate, exposure is with the prefabricated pile of round platform, and maintenance afterwards just can be completed.
When the need pile extension,, the rod iron with round platform is inserted in the 4th groove of stake end transition piece overhead approximately during 0.6m until the stake upper end that is driven in advance or is pressed into, will winch to waiting on it afterwards, consistency from top to bottom is connected firmly; Then utilize fixedly pile extension position surrounding of some curved plates, surround circle, recycling hoop bar is fixed curved plate.This method has greatly strengthened the bending resistance extraction-resistant behavior that prefabricated pile connects, and is applicable to the formation condition complexity, the use under particular surroundings.
The hoop bar is circular, and its cross section is trapezoidal, before pile extension not, will bind round respectively bar and be enclosed within the up and down stake (be enclosed within and be referred to as the hoop bar, upper hoop bar cross section is wide at the top and narrow at the bottom; Be enclosed within lower and be referred to as lower hoop bar, lower hoop bar cross section is up-narrow and down-wide), the slightly larger in diameter of hoop bar is in the prefabricated pile diameter, after being enclosed within curved plate on prefabricated pile, two hoop bars move respectively from top to bottom and from bottom to up, when the steel plate hoop bar is fixed curved plate from top to bottom, its cross section is wide at the top and narrow at the bottom, when the steel plate hoop bar was fixed curved plate from bottom to up, its cross section was up-narrow and down-wide, and two hoop bars are completely fixed in curved plate on prefabricated pile.
All metal parts of the present invention are all processed through galvanizing, and antiseptic power is stronger, especially in the soil layer below level of ground water, has higher anti-corrosion capability.
Claims (8)
1. shockproof resistance to plucking bending resistance prefabricated pile, this prefabricated pile is hollow structure, the prefabricated pile top arranges the top connector, the prefabricated pile bottom arranges the bottom connector, between adjacent prefabricated pile, transition piece is set, during piling, the prefabricated pile top arranges the piling connector, it is characterized in that comprising some prestressing force master muscle, concrete, the end plate of both sides and the round platform that matches with prestressing force master muscle, described prestressing force master muscle evenly is arranged in prefabricated pile, adjacent prestressing force master muscle surrounds circle by stirrup, described Concrete Filled forms prefabricated pile around prestressing force master muscle and stirrup, be provided with the through hole of cross-under prestressing force master muscle on described end plate, prestressing force master muscle passes through hole on end plate and the round platform of end plate opposite side setting is connected.
2. a kind of shockproof resistance to plucking bending resistance prefabricated pile according to claim 1, is characterized in that described prestressing force master muscle two ends are provided with external screw thread, and described round platform arranges internal thread, and prestressing force master muscle and round platform are by external screw thread and internal thread threaded.
3. a kind of shockproof resistance to plucking bending resistance prefabricated pile according to claim 2, is characterized in that described internal thread is arranged on the large end of round platform, is provided with annular groove on the circumference of round platform small end.
4. a kind of shockproof resistance to plucking bending resistance prefabricated pile according to claim 3, it is characterized in that described top connector is the circular steel plate that an end face arranges solid hemisphere, described solid hemisphere is arranged on the center of circular steel plate, circular steel plate arranges on solid hemisphere circumference simultaneously the first groove that some and described round platform matches is set, and on described solid hemisphere body, the second groove is set; Be provided with a plurality of the first stopper slots on the inner periphery of described the first groove and the second groove, the first spacer pin and the first spring are set in the first stopper slot, the first spring is arranged in the first stopper slot, the first spacer pin one end is arranged in the first stopper slot and touches and coordinate with the first spring, the first spacer pin other end is given prominence to the first stopper slot, and the inclined-plane of the end face of the first spacer pin of outstanding the first stopper slot for round platform, matching, described the first spacer pin matches with the annular groove of round platform.
5. a kind of shockproof resistance to plucking bending resistance prefabricated pile according to claim 3, it is characterized in that described transition piece is the circular steel plate that two end faces all arrange solid hemisphere, described solid hemisphere is arranged on the center of circular steel plate, on the circumference of circular steel plate both ends of the surface, the 3rd groove that some and described round platform matches is set all, on the solid hemisphere body of both ends of the surface, the 4th groove is set all; Be provided with a plurality of the second stopper slots on the inner periphery of described the 3rd groove and the 4th groove, the second spacer pin and the second spring are set in the second stopper slot, the second spring is arranged in the second stopper slot, the second spacer pin one end is arranged in the second stopper slot and touches and coordinate with the second spring, the second spacer pin other end is given prominence to the second stopper slot, and the inclined-plane of the end face of the second spacer pin of outstanding the second stopper slot for round platform, matching, described the second spacer pin matches with the annular groove of round platform.
6. a kind of shockproof resistance to plucking bending resistance prefabricated pile according to claim 3, it is characterized in that described piling connector is bolted and is formed by upper arm-tie and lower pulling plate, on the overall structure of upper arm-tie and lower pulling plate formation, the 5th groove that matches with round platform is set, be provided with a plurality of the 3rd stopper slots on the inner periphery of the 5th groove, the 3rd spacer pin and the 3rd spring are set in the 3rd stopper slot, the 3rd spring is arranged in the 3rd stopper slot, the 3rd spacer pin one end is arranged in the 3rd stopper slot and touches and coordinate with the 3rd spring, the 3rd spacer pin other end is given prominence to the 3rd stopper slot, and the inclined-plane of the end face of the 3rd spacer pin of outstanding the 3rd stopper slot for round platform, matching, described the 3rd stopper slot is arranged on the junction of arm-tie and lower pulling plate, and the 3rd spacer pin matches with the annular groove of round platform.
7. a kind of shockproof resistance to plucking bending resistance prefabricated pile according to claim 3, it is characterized in that described bottom connector is that an end face arranges solid hemisphere, an end face and is arranged to the steel plate of taper, described solid hemisphere is arranged on the center of steel plate, steel plate arranges on solid hemisphere circumference simultaneously the 6th groove that some and described round platform matches is set, and on described solid hemisphere body, the 7th groove is set; Be provided with a plurality of the 4th stopper slots on the inner periphery of described the 6th groove and the 7th groove, the 4th spacer pin and the 4th spring are set in the 4th stopper slot, the 4th spring is arranged in the 4th stopper slot, the 4th spacer pin one end is arranged in the 4th stopper slot and touches and coordinate with the 4th spring, the 4th spacer pin other end is given prominence to the 4th stopper slot, and the inclined-plane of the end face of the 4th spacer pin of outstanding the 4th stopper slot for round platform, matching, described the 4th spacer pin matches with the annular groove of round platform.
8. the manufacture craft of a shockproof resistance to plucking bending resistance prefabricated pile is characterized in that comprising the following steps:
1) concrete for making: make the fresh concrete of the low slump of 4～6cm with the concrete forced mixer, strength grade of concrete is not less than C60 or C80;
2) prestressing force master muscles and bones frame is made: prestressing force master muscle adopts the prestressed concrete reinforcing steel of low loose type, need accurate fixed-length, cut-out and at prestressing force master muscle two ends, make and be connected the external screw thread that adapts with round platform, internal thread is set in round platform, the setting that is spirally connected of prestressing force master muscle and round platform, at prestressing force master muscle circumference, stirrup is set, stirrup adopts the low-carbon (LC) cold drawn wire of 4mm～6mm, and stirrup and circular prestressing force master muscles and bones frame adopt automatic welding machined or artificial welding;
3) end plate is made: end plate is circular, and the through hole of cross-under prestressing force master muscle is arranged on plate, and through-hole diameter is greater than prestressing force master muscle diameter; Step 2) threaded is carried out with round platform after inserting end plate with externally threaded prestressing force master muscle in the two ends of making in;
4) the piling connector is made: the piling connector is bolted and is formed by upper arm-tie and lower pulling plate, on the overall structure of upper arm-tie and lower pulling plate formation, the 5th groove that matches with round platform is set, be provided with a plurality of the 3rd stopper slots on the inner periphery of the 5th groove, the 3rd spacer pin and the 3rd spring are set in the 3rd stopper slot, the 3rd spring is arranged in the 3rd stopper slot, the 3rd spacer pin one end is arranged in the 3rd stopper slot and touches and coordinate with the 3rd spring, the 3rd spacer pin other end is given prominence to the 3rd stopper slot, and the inclined-plane of the end face of the 3rd spacer pin of outstanding the 3rd stopper slot for round platform, matching, the 3rd stopper slot is arranged on the junction of arm-tie and lower pulling plate, the 3rd spacer pin matches with the annular groove of round platform, when round platform inserts the 5th groove, the 3rd spring promotes the 3rd spacer pin, the 3rd spacer pin is pushed annular groove in round platform, with round platform lock jail, form because arm-tie and lower pulling plate on this piling connector are bolted, remove bolt, can unload arm-tie and lower pulling plate, expose the 3rd spring and the 3rd spacer pin, stir the 3rd spring, round platform and the 3rd spacer pin are broken away from, expose the prefabricated pile with round platform, upper arm-tie center is provided with screw thread, is used for tension rod is installed, and tension rod is connected with stretching machine, round platform on the prestressing force master muscle of making in step 3) is inserted the 5th groove,
5) prestressed master muscles and bones frame: the prestressing force master muscle that has connected the piling connector in step 4) is positioned in the lower mold half of centrifugal prefabricated pile, and the upper arm-tie of a side is connected with tension rod, and tension rod stretches out outside mould;
6) concrete distributing: by the consumption requirement of every centrifugal prefabricated pile, the fresh concrete of making in step 1) is evenly filled up the lower mold half of step 5) along mould, stretch-draw one some concrete of the many cloth of end;
7) matched moulds: the prefabricated pile upper mold half is winched to lower mold half top, with fastening bolt, the up and down mold halves is fixedly connected with, make end plate and piling connector all at mould inside, and guarantee mould loosening and concrete running pulp not in the high speed centrifugation operation process;
8) prestressed stretch-draw: jack is connected with the tension rod of stretching, and the centrifugal prefabricated pile prestressing force master muscles and bones frame after matched moulds is carried out stretch-draw, and stretch-draw after some strength, is fixed on tension rod on mould with big nut;
9) centrifugal treating: the mold hoisting after stretch-draw anchor in step 8) to centrifuge top is accelerated step by step,, by centrifugal closely knit moulding process, make fresh concrete evenly closely knit along centrifugal prefabricated pile mould surrounding, simultaneously the inner cavity that forms of prefabricated pile;
10) maintenance: band mould prefabricated pile after centrifugal forming is winched in the steam curing pond, and under normal pressure, maintenance is 4～8 hours, makes concrete strength reach requirement;
11) demoulding: the band mould prefabricated pile after maintenance is winched on special-purpose demoulding platform position, fastening bolt is shed, hang away upper mold half, stir lower mold half, shed tension rod, remove the bolt on the piling connector, upper arm-tie separates with lower pulling plate, outwards stir the 3rd spring, round platform and the 3rd spacer pin are broken away from, expose the prefabricated pile with round platform; To finished product stockyard Ma Dui, natural curing, can dispatch from the factory after reaching the intensity of dispatching from the factory with the direct handling of the prefabricated pile after the demoulding.
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| CN105133599A (en) * | 2015-09-21 | 2015-12-09 | 周兆弟 | Uplift pile |
| CN111305456A (en) * | 2020-03-30 | 2020-06-19 | 四川华远建设工程有限公司 | Assembled wall and construction process thereof |
| CN113927728A (en) * | 2021-11-29 | 2022-01-14 | 郑州大学综合设计研究院有限公司 | Novel prestressed concrete mixed reinforcement pipe pile manufacturing device and method |
| CN115404892A (en) * | 2022-10-14 | 2022-11-29 | 青创联建设工程(唐山)有限公司 | Composite pile foundation structure |
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|---|---|
| CN103386709B (en) | 2015-07-29 |
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