CN101487254A - Construction method of vibrating immersed tube gravel slip-casting pile - Google Patents
Construction method of vibrating immersed tube gravel slip-casting pile Download PDFInfo
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- CN101487254A CN101487254A CNA200910046183XA CN200910046183A CN101487254A CN 101487254 A CN101487254 A CN 101487254A CN A200910046183X A CNA200910046183X A CN A200910046183XA CN 200910046183 A CN200910046183 A CN 200910046183A CN 101487254 A CN101487254 A CN 101487254A
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Abstract
The invention relates to a construction method for a vibration sinking pipe crushed stone grouting pile, which is a new method which integrates foundation treatment and deep foundation construction process into a whole and comprises the steps as follows: (1) sinking pipe is vibrated; (2) a reinforcing cage and an injection pipe are placed; (3) crushed stone is poured; (4) the pile is formed by pulling the pipe under vibration; (5) a drainage ditch is excavated; and (6) the pile is formed by injection. The method solves the problem that the prior art can not be compatible with the foundation treatment and deep foundation construction and makes up the shortages of the prior art.
Description
Technical field
The invention belongs to technical field of building construction, be specifically related to building lot and foundation construction field, disclose a kind of construction method of vibrating immersed tube gravel slip-casting pile, is a kind of novel construction method that integrates ground processing and deep foundation construction technology.
Background technology
At present the worker method close with the present invention has 3 kinds in the engineering field, and one is the boring root pile, and it two be a broken stone pile, and it three is a vibrator pipe sinking cast-in-place pile, and it is as follows to show division:
1, boring root pile
This worker's method is to hole in soil layer with rig, in the hole, transfer reinforcing cage and in the middle of reinforcing cage, transfer a Grouting Pipe after adopting mud off, pore-forming, fill up rubble then, and it is anti-when going out clear water to the aperture to carry out clearly the hole flushing with clear water, by Grouting Pipe cement injection in rubble, after clear water cemented out, solidify pile.There is the defective himself can't overcome in this kind worker method: 1. owing to adopt mud off when creeping into, will produce a large amount of mud, and easily cause the place pollution; 2. drilling efficiency is low; When 3. rubble was lowered in the mud, the rubble surface had formed one deck mud film as thin as a wafer, and clear water can't rinse out, and it is not tight to cause rubble and cement paste to bond, and caused pile strength to reduce, and generally, the pile strength of root pile all is lower than the C20 strength grade.
2, broken stone pile
This worker's method utilizes vibration head that rubble vibration is clamp-oned in the soft soil layer, utilizes compacted effect and metathesis soil mass consolidation, but only can form composite foundation and can not form pile foundation.
3, vibrator pipe sinking cast-in-place pile
This worker's method is established to design elevation the stake tube vibration is heavy, transfers reinforcing cage in pipe, concrete perfusion, and tube drawing pile then, but there is following defective in this worker's method:
(1) because the soil compaction effect of stake pipe can form excess pore water pressure in soft soil layer, the pile body diffusion of the ot-yet-hardened that excess pore water pressure will have been constructed along the stake periphery, cause underground water along the pile body ground of emerging, cause the pile concrete segregation, influence pile quality, even stake is scrapped.
(2) in hard slightly soil layer, though excess pore water pressure can not impact the pile body of having constructed,, make the soil body can not discharging consolidation because the water in the soil layer has passage to discharge ground, can not improve the bearing capacity of soil layer.
In sum, the present invention reinforces soft layer with pile foundation construction and unites two into one, and has overcome many defectives of present popular worker's method fully, be a kind ofly construct rapidly, reliable in quality, cheap, good method that cost performance is high.
Summary of the invention
The purpose of this invention is to provide a kind of construction method of vibrating immersed tube gravel slip-casting pile, it is a kind of novel construction method that integrates ground processing and deep foundation construction technology, the present invention utilizes the compacted principle of soil compaction stake to soil layer, the discharging consolidation principle of the shake close principle and the soil of vibration sinking tube pile, make loose sand layer be able to closely knit, the water content of saturated soft clay is reduced, thereby weak foundation soil is reinforced, and utilize the concrete pile behind the pile to transmit load to the soil layer deep as deep foundation, make full use of the sidewall frictional resistance of stake, and then the foundation soil after the utilization reinforcing is as the bearing stratum of plate base, pile foundation support table is as plate shape basis, make pile foundation and the acting in conjunction of plate base, bear the load of superstructure jointly.According to measuring and calculating, the loading ratio of plate base and pile foundation can reach 3:7～7:3; A kind of construction method of vibrating immersed tube gravel slip-casting pile of the present invention combines the vibration sinking tube pile of pipeline sinking pile, the high-pressure slip-casting pile-formation process of compacted discharging consolidation of sand-gravel pile and root pile.The invention solves the problem that the prior art ground is handled and the deep foundation construction can not take into account, remedied the deficiencies in the prior art.
As optimized technical scheme:
A kind of construction method of vibrating immersed tube gravel slip-casting pile of the present invention may further comprise the steps:
(1) vibration sinking tube: according to putting fixed stake position in advance, an absolute altitude at the bottom of with the vibration sinking tube pile driver stake tube vibration immersed tube promptly being designed to the degree of depth of being scheduled to;
(2) put reinforcing cage and Grouting Pipe: in the stake pipe, transfer reinforcing cage, and at one or more steel pipe of reinforcing cage center fixation or PVC plastic pipe as Grouting Pipe; Grouting Pipe length slightly is longer than designing pile length, and one way valve is installed in the Grouting Pipe lower end, and the assurance pipe end is not stopped up, and Grouting Pipe is suitable for reading a little more than ground, is convenient to grouting;
(3) irritate rubble: in the stake pipe, fill rubble, require the rubble quality to meet national concrete rubble standard for building; As design to pile strength when less demanding, also can be with building wastes such as waste and old broken concrete, cement mortar fragment and queen closer replacement rubble; Ballast grain sizes 20～100mm;
(4) vibration pipe-drawing pile: tube drawing becomes the soil compaction broken stone pile while vibrating; Should carry out in the vibration pipe-drawing formation of pile feeding in raw material in the air, the assurance stake is risen in about design elevation 0.5m, and control pipe-pulling speed 0.5m～1.0m/min, guarantees a rubble compactness and a footpath;
(5) drainage trenching: after The Macadam Pile Construction finishes, dig an open drain on the stake limit, to guarantee in time to discharge the underground water of gushing out in the broken stone pile;
(6) grouting pile-forming: The Macadam Pile Construction is after 5～7 days, and the excess pore water pressure that produces owing to the soil compaction effect discharges substantially and finishes, and when no longer including underground water in the hole and emerging, uses compaction grouting pump pressure injection cement paste from the Grouting Pipe of reserving, and forms concrete pile; Cement paste uses ordinary portland cement to mix system, water/binder ratio about 0.5, proportion about 1.75; Cement paste mouth at the bottom of Grouting Pipe is emerged during pressure injection, slurry than great, viscosity is big, the water in rubble gap upwards can be discharged; Treat that water row finishes, after the stake top had fresh water mud to emerge, the concrete pile construction finished.
The present invention also provides a kind of construction method of vibrating immersed tube gravel slip-casting pile that does not have the muscle stake, may further comprise the steps:
(1) vibration sinking tube: according to putting fixed stake position in advance, an absolute altitude at the bottom of with the vibration sinking tube pile driver stake tube vibration immersed tube promptly being designed to the degree of depth of being scheduled to;
(2) put Grouting Pipe: hang one or more steel pipe or PVC plastic pipe as Grouting Pipe in the middle of the stake pipe, Grouting Pipe length slightly is longer than designing pile length.One way valve is installed in the Grouting Pipe lower end, and the assurance pipe end is not stopped up, and Grouting Pipe is suitable for reading a little more than ground, is convenient to grouting;
(3) irritate rubble: in the stake pipe, fill rubble, require the rubble quality to meet national concrete rubble standard for building; As design to pile strength when less demanding, also can be with building wastes such as waste and old broken concrete, cement mortar fragment and queen closer replacement rubble; Ballast grain sizes 20～100mm;
(4) vibration pipe-drawing pile: tube drawing becomes the soil compaction broken stone pile while vibrating; Should carry out in the vibration pipe-drawing formation of pile feeding in raw material in the air, the assurance stake is risen in about design elevation 0.5m, and control pipe-pulling speed 0.5m～1.0m/min, guarantees a rubble compactness and a footpath;
(5) drainage trenching: after The Macadam Pile Construction finishes, dig an open drain on the stake limit, to guarantee in time to discharge the underground water of gushing out in the broken stone pile;
(6) grouting pile-forming: The Macadam Pile Construction is after 5～7 days, and the excess pore water pressure that produces owing to the soil compaction effect discharges substantially and finishes, and when no longer including underground water in the hole and emerging, uses compaction grouting pump pressure injection cement paste from the Grouting Pipe of reserving, and forms concrete pile; Cement paste uses ordinary portland cement to mix system, water/binder ratio about 0.5, proportion about 1.75; Cement paste mouth at the bottom of Grouting Pipe is emerged during pressure injection, slurry than great, viscosity is big, the water in rubble gap upwards can be discharged.Treat that water row finishes, after the stake top had fresh water mud to emerge, the concrete pile construction finished.
The invention has the beneficial effects as follows:
1, a kind of construction method of vibrating immersed tube gravel slip-casting pile of the present invention is owing to sink in the soil at formation of pile king-pile pipe, around the soil at stake pipe place pressed to, its compacted influence basin can reach 3～4 times of stake footpaths, have tangible compacted effect, particularly more obvious to the consolidation effect of soil layer for its compacted effect of saturated soft clay stratum.
2, owing to adopt the vibration sinking tube pile foundation to be carried out to stake, its vibration frequency is up to more than 1000 times/minute, and fairly obvious to the close effect of shaking of the sand layer of loose cohesionless soil and liquefaction, the close influence basin of shaking can reach 5～6 times of stakes footpaths.
3, behind the broken stone pile pile, the rubble gap of pile body is the better channels of water, soil layer be subjected to compacted after, excess pore water pressure will discharge in the rubble gap, that is pore water enters the rubble gap.When the rubble gap is full of by water, and the pore water pressure of soil during greater than the static pressure of water underground water discharge ground along broken stone pile.The water content that pore water in the soil layer loses the back soil layer reduces, and void ratio reduces, and the soil body is by fixed, and it is closely knit that soil layer becomes, and its bearing capacity will improve 50%～100%.
4, behind the broken stone pile pile, though the intensity of soil layer is improved, the intensity of broken stone pile is lower, is subjected to be easy to generate dilatancy behind the pressure of foundation and destroys.The stake of its Payload is long only can to reach 3～4 times of stakes directly, and the stress ratio of the composite foundation that broken stone pile and soil layer are formed only is 2.2～4.1, and the pile foundation performance is difficult to performance, and economic benefit is relatively poor.But when fills with water mud in broken stone pile and after solidifying, broken stone pile promptly changes concrete pile into, pile strength greatly improves, and can reach the C30 strength grade.Upper load can transmit to the soil layer deep along pile body, effectively utilizes the frictional resistance of the soil body to pile body, makes the stress ratio n of stake soil reach 24.3～29.4.
In sum, this worker sends out the compaction grouting method that overcome in traditional worker's method only can compacted soil layer and shortcoming that can not discharging consolidation, also having overcome plastic draining board only can discharging consolidation and shortcoming that can not compacted soil layer, and has overcome that sand drain preloading equipment and materials freight volume is big, the shortcoming of long construction period.It is low also to have overcome conventional concrete pile driving construction work efficiency simultaneously, the drilling slurry contaminated environment can not improve the bearing capacity of natural ground soil, shortcoming such as cost is higher, and can adopt a clump of piles to add board-like basis and be used for highrise building, have apparent in view technical advantage and economic advantages.
Description of drawings
Fig. 1 is the vibration sinking tube schematic diagram of a kind of construction method of vibrating immersed tube gravel slip-casting pile of the present invention
Fig. 2 be a kind of construction method of vibrating immersed tube gravel slip-casting pile of the present invention put reinforcing cage and Grouting Pipe schematic diagram
Fig. 3 is the filling rubble schematic diagram of a kind of construction method of vibrating immersed tube gravel slip-casting pile of the present invention
Fig. 4 is the vibration pipe-drawing pile schematic diagram of a kind of construction method of vibrating immersed tube gravel slip-casting pile of the present invention
Fig. 5 is the grouting pile-forming schematic diagram of a kind of construction method of vibrating immersed tube gravel slip-casting pile of the present invention
Wherein 1 is that vibrator 2 is that stake pipe 3 is that reinforcing cage 4 is Grouting Pipe
The 5th, rubble 6 is that flapper pile tip 7 is that cement paste 8 is gutters
The specific embodiment
Below in conjunction with the specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
A kind of construction method of vibrating immersed tube gravel slip-casting pile of the present invention may further comprise the steps:
(1) vibration sinking tube: according to putting fixed stake position in advance, an absolute altitude at the bottom of with the vibration sinking tube pile driver stake tube vibration immersed tube promptly being designed to the degree of depth of being scheduled to;
(2) put reinforcing cage and Grouting Pipe: in the stake pipe, transfer reinforcing cage, and at one or more steel pipe of reinforcing cage center fixation or PVC plastic pipe as Grouting Pipe; Grouting Pipe length slightly is longer than designing pile length, and one way valve is installed in the Grouting Pipe lower end, and the assurance pipe end is not stopped up, and Grouting Pipe is suitable for reading a little more than ground, is convenient to grouting;
(3) irritate rubble: in the stake pipe, fill rubble, require the rubble quality to meet national concrete rubble standard for building; As design to pile strength when less demanding, also can be with building wastes such as waste and old broken concrete, cement mortar fragment and queen closer replacement rubble; Ballast grain sizes 20～100mm;
(4) vibration pipe-drawing pile: tube drawing becomes the soil compaction broken stone pile while vibrating; Should carry out in the vibration pipe-drawing formation of pile feeding in raw material in the air, the assurance stake is risen in about design elevation 0.5m, and control pipe-pulling speed 0.5m～1.0m/min, guarantees a rubble compactness and a footpath;
(5) drainage trenching: after The Macadam Pile Construction finishes, dig an open drain on the stake limit, to guarantee in time to discharge the underground water of gushing out in the broken stone pile;
(6) grouting pile-forming: The Macadam Pile Construction is after 5～7 days, and the excess pore water pressure that produces owing to the soil compaction effect discharges substantially and finishes, and when no longer including underground water in the hole and emerging, uses compaction grouting pump pressure injection cement paste from the Grouting Pipe of reserving, and forms concrete pile; Cement paste uses ordinary portland cement to mix system, water/binder ratio about 0.5, proportion about 1.75; Cement paste mouth at the bottom of Grouting Pipe is emerged during pressure injection, slurry than great, viscosity is big, the water in rubble gap upwards can be discharged; Treat that water row finishes, after the stake top had fresh water mud to emerge, the concrete pile construction finished.
The present invention also provides a kind of construction method of vibrating immersed tube gravel slip-casting pile that does not have the muscle stake, may further comprise the steps:
(1) vibration sinking tube: according to putting fixed stake position in advance, an absolute altitude at the bottom of with the vibration sinking tube pile driver stake tube vibration immersed tube promptly being designed to the degree of depth of being scheduled to;
(2) put Grouting Pipe: hang one or more steel pipe or PVC plastic pipe as Grouting Pipe in the middle of the stake pipe, Grouting Pipe length slightly is longer than designing pile length.One way valve is installed in the Grouting Pipe lower end, and the assurance pipe end is not stopped up, and Grouting Pipe is suitable for reading a little more than ground, is convenient to grouting;
(3) irritate rubble: in the stake pipe, fill rubble, require the rubble quality to meet national concrete rubble standard for building; As design to pile strength when less demanding, also can be with building wastes such as waste and old broken concrete, cement mortar fragment and queen closer replacement rubble; Ballast grain sizes 20～100mm;
(4) vibration pipe-drawing pile: tube drawing becomes the soil compaction broken stone pile while vibrating; Should carry out in the vibration pipe-drawing formation of pile feeding in raw material in the air, the assurance stake is risen in about design elevation 0.5m, and control pipe-pulling speed 0.5m～1.0m/min, guarantees a rubble compactness and a footpath;
(5) drainage trenching: after The Macadam Pile Construction finishes, dig an open drain on the stake limit, to guarantee in time to discharge the underground water of gushing out in the broken stone pile;
(6) grouting pile-forming: The Macadam Pile Construction is after 5～7 days, and the excess pore water pressure that produces owing to the soil compaction effect discharges substantially and finishes, and when no longer including underground water in the hole and emerging, uses compaction grouting pump pressure injection cement paste from the Grouting Pipe of reserving, and forms concrete pile; Cement paste uses ordinary portland cement to mix system, water/binder ratio about 0.5, proportion about 1.75; Cement paste mouth at the bottom of Grouting Pipe is emerged during pressure injection, slurry than great, viscosity is big, the water in rubble gap upwards can be discharged.Treat that water row finishes, after the stake top had fresh water mud to emerge, the concrete pile construction finished.
The invention provides a kind of construction method of vibrating immersed tube gravel slip-casting pile, it is a kind of novel construction method that integrates ground processing and deep foundation construction technology, the present invention utilizes the compacted principle of soil compaction stake to soil layer, the discharging consolidation principle of the shake close principle and the soil of vibration sinking tube pile, make loose sand layer be able to closely knit, the water content of saturated soft clay is reduced, thereby weak foundation soil is reinforced, and utilize the concrete pile behind the pile to transmit load to the soil layer deep as deep foundation, make full use of the sidewall frictional resistance of stake, and then the foundation soil after the utilization reinforcing is as the bearing stratum of plate base, pile foundation support table is as plate shape basis, make pile foundation and the acting in conjunction of plate base, bear the load of superstructure jointly.According to measuring and calculating, the loading ratio of plate base and pile foundation can reach 3: 7～7:3; A kind of construction method of vibrating immersed tube gravel slip-casting pile of the present invention combines the vibration sinking tube pile of pipeline sinking pile, the high-pressure slip-casting pile-formation process of compacted discharging consolidation of sand-gravel pile and root pile.The invention solves the problem that the prior art ground is handled and the deep foundation construction can not take into account, remedied the deficiencies in the prior art.
Claims (2)
1. construction method of vibrating immersed tube gravel slip-casting pile is characterized in that may further comprise the steps:
(1) vibration sinking tube: according to putting fixed stake position in advance, an absolute altitude at the bottom of with the vibration sinking tube pile driver stake tube vibration immersed tube promptly being designed to the degree of depth of being scheduled to;
(2) put reinforcing cage and Grouting Pipe: in the stake pipe, transfer reinforcing cage, and at one or more steel pipe of reinforcing cage center fixation or PVC plastic pipe as Grouting Pipe; Grouting Pipe length slightly is longer than designing pile length, and one way valve is installed in the Grouting Pipe lower end, and the assurance pipe end is not stopped up, and Grouting Pipe is suitable for reading a little more than ground, is convenient to grouting;
(3) irritate rubble: in the stake pipe, fill rubble, require the rubble quality to meet national concrete rubble standard for building; As design to pile strength when less demanding, also can be with building wastes such as waste and old broken concrete, cement mortar fragment and queen closer replacement rubble; Ballast grain sizes 20～100mm;
(4) vibration pipe-drawing pile: tube drawing becomes the soil compaction broken stone pile while vibrating; Should carry out in the vibration pipe-drawing formation of pile feeding in raw material in the air, the assurance stake is risen in about design elevation 0.5m, and control pipe-pulling speed 0.5m～1.0m/min, guarantees a rubble compactness and a footpath;
(5) drainage trenching: after The Macadam Pile Construction finishes, dig an open drain on the stake limit, to guarantee in time to discharge the underground water of gushing out in the broken stone pile;
(6) grouting pile-forming: The Macadam Pile Construction is after 5～7 days, and the excess pore water pressure that produces owing to the soil compaction effect discharges substantially and finishes, and when no longer including underground water in the hole and emerging, uses compaction grouting pump pressure injection cement paste from the Grouting Pipe of reserving, and forms concrete pile; Cement paste mouth at the bottom of Grouting Pipe is emerged during pressure injection, slurry than great, viscosity is big, the water in rubble gap upwards can be discharged; Treat that water row finishes, after the stake top had fresh water mud to emerge, the concrete pile construction finished.
2. construction method of vibrating immersed tube gravel slip-casting pile is characterized in that may further comprise the steps:
(1) vibration sinking tube: according to putting fixed stake position in advance, an absolute altitude at the bottom of with the vibration sinking tube pile driver stake tube vibration immersed tube promptly being designed to the degree of depth of being scheduled to;
(2) put Grouting Pipe: hang one or more steel pipe or PVC plastic pipe as Grouting Pipe in the middle of the stake pipe, Grouting Pipe length slightly is longer than designing pile length.One way valve is installed in the Grouting Pipe lower end, and the assurance pipe end is not stopped up, and Grouting Pipe is suitable for reading a little more than ground, is convenient to grouting;
(3) irritate rubble: in the stake pipe, fill rubble, require the rubble quality to meet national concrete rubble standard for building; As design to pile strength when less demanding, also can be with building wastes such as waste and old broken concrete, cement mortar fragment and queen closer replacement rubble; Ballast grain sizes 20～100mm;
(4) vibration pipe-drawing pile: tube drawing becomes the soil compaction broken stone pile while vibrating; Should carry out in the vibration pipe-drawing formation of pile feeding in raw material in the air, the assurance stake is risen in about design elevation 0.5m, and control pipe-pulling speed 0.5m～1.0m/min, guarantees a rubble compactness and a footpath;
(5) drainage trenching: after The Macadam Pile Construction finishes, dig an open drain on the stake limit, to guarantee in time to discharge the underground water of gushing out in the broken stone pile;
(6) grouting pile-forming: The Macadam Pile Construction is after 5～7 days, and the excess pore water pressure that produces owing to the soil compaction effect discharges substantially and finishes, and when no longer including underground water in the hole and emerging, uses compaction grouting pump pressure injection cement paste from the Grouting Pipe of reserving, and forms concrete pile; Cement paste mouth at the bottom of Grouting Pipe is emerged during pressure injection, slurry than great, viscosity is big, the water in rubble gap upwards can be discharged.Treat that water row finishes, after the stake top had fresh water mud to emerge, the concrete pile construction finished.
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| CN102767173A (en) * | 2012-07-09 | 2012-11-07 | 河海大学 | High polymer material slurry filled discrete material pile composite foundation and construction method thereof |
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| CN103590395A (en) * | 2013-11-27 | 2014-02-19 | 宁波盛宏建设工程有限公司 | Construction method of gravel grouting pile |
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| CN105386436A (en) * | 2015-12-08 | 2016-03-09 | 南京林业大学 | Composite foundation with discrete material pile restrained through microorganism soil solidification and construction method |
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Application publication date: 20090722 |