CN103061341A - Middle-excavating pile-sinking construction method - Google Patents

Middle-excavating pile-sinking construction method Download PDF

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Publication number
CN103061341A
CN103061341A CN2013100144060A CN201310014406A CN103061341A CN 103061341 A CN103061341 A CN 103061341A CN 2013100144060 A CN2013100144060 A CN 2013100144060A CN 201310014406 A CN201310014406 A CN 201310014406A CN 103061341 A CN103061341 A CN 103061341A
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China
Prior art keywords
pile
stake
drill head
machine drill
preformed pile
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CN2013100144060A
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CN103061341B (en
Inventor
许俊
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Jiangsu Chen Chen machinery equipment manufacturing Limited by Share Ltd
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JIANGSU TANGCHEN MACHINERY EQUIPMENT MANUFACTURING Co Ltd
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Publication of CN103061341A publication Critical patent/CN103061341A/en
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Abstract

The invention provides a middle-excavating pile-sinking construction method. A precast pile is sleeved outside a drill bit of a piling machine, and the drill bit of the piling machine and a spiral drill pipe penetrate into the lower end of the precast pile from the upper end of the precast pile to drill and excavate a foundation. The construction method is characterized in that high-pressure gas is filled when the drill bit excavates the foundation to form a pile hole, drilling and excavation residual soil of a precast pile hollow portion is discharged into a soil storage tank of the piling machine through the high-pressure soil and the spiral drill pipe, and sinking speed of the precast pile is controlled to enable the precast pile to synchronously sink in the drill hole along with drilling and excavating of the drill bit. The method includes the steps: when the drill bit of the piling machine excavates to a supporting layer of the foundation, temporarily fixing the precast pile in the pile hole, stopping to fill the high-pressure gas and expanding turning radius of the drill bit of the pilling machine; and continuing to drilling and excavating downwards to enlarge the pile hole, wherein the diameter of the enlarged pile hole is larger than the outer diameter of the precast pile. By the method, the problem of low pile end bearing capacity of a precast pile sunk into a foundation in the prior art is effectively solved.

Description

Middle pick pile sinking construction method
Technical field
The present invention relates to the piling Technology field, in particular to a kind of middle pick pile sinking construction method.
Background technology
In the capital works of today, it is particularly important that the construction of pile foundation seems.Preformed pile is used in the capital works very general, to selecting of pile-driving method, except according to the engineering geological conditions, also to consider type, section, length, place environment and the designing requirement of stake, during adopting mostly, the present pile-sinking method of hollow concrete preformed pile digs pile sinking construction method.Yet middle pick pile sinking construction method now is because the single bearing capacity of pile tip that causes preformed pile to sink in the ground of boring internal diameter is little.
Summary of the invention
The present invention aims to provide a kind of middle pick pile sinking construction method, sinks to the little problem of bearing capacity of pile tip in the ground to solve preformed pile in the prior art.
To achieve these goals, the invention provides a kind of pick pile sinking construction method for preformed pile, preformed pile is set in an outside of machine drill head, stake machine drill head and auger stem penetrate to the lower end of preformed pile from the upper end of preformed pile ground are bored the pick hole, job practices is injected gases at high pressure when drill bit undermines formation stake hole, the brill pick surflaes of preformed pile hollow bulb enters the Chu Tuxiang of a machine by gases at high pressure and auger stem, and the subsidence velocity of control preformed pile, preformed pile is sunk synchronously with the bit drills pick in boring, may further comprise the steps: when stake machine drill head excavates the bearing stratum of ground, preformed pile is fixed in the hole temporarily, and stop to inject gases at high pressure, and enlarge the radius of gyration of stake machine drill head; Continue to bore pick downwards to enlarge the stake hole, the diameter in the stake hole after the expansion is greater than the external diameter of preformed pile.
Further, after the step of the radius of gyration that enlarges stake machine drill head, further comprising the steps of: the radius of gyration of confirming stake machine drill head is extended, injected water mud in the stake hole, when continuing to bore pick with expansion stake hole downwards, stake machine drill head stirs bearing stratum mixes the grit of cement paste and bearing stratum fully, and finishes and build the stake end and enlarge a napiform root.
Further, after finishing the step of building stake end expansion napiform root, further comprising the steps of: releasing is temporary fixed to preformed pile, preformed pile is sunk to the projected depth place that enlarges napiform root, preformed pile and bearing stratum are combined together, and again finish the fixing of preformed pile.
Further, after the step of again fixing of preformed pile, further comprising the steps of: a counter-rotating stake machine drill head, the machine drill head after control enlarges bounces back to normal external diameter and makes a machine drill head continue counter-rotating, then mentions a machine drill head and finishes construction.
Further, before stake machine drill head arrives bearing stratum, according to soil layer hardness and designing requirement, opened in advance the radius of gyration that enlarges stake machine drill head before stake machine drill head arrives bearing stratum, the radius of gyration after stake machine drill head enlarges is greater than the external diameter of preformed pile.
Use technical scheme of the present invention, the pick pile sinking construction method that is used for preformed pile, preformed pile is set in an outside of machine drill head, stake machine drill head and auger stem penetrate to the lower end of preformed pile from the upper end of preformed pile ground are bored the pick hole, job practices is injected gases at high pressure when drill bit undermines formation stake hole, the brill pick surflaes of preformed pile hollow bulb enters the Chu Tuxiang of a machine by gases at high pressure and auger stem, and the subsidence velocity of control preformed pile, preformed pile is sunk synchronously with the bit drills pick in boring, may further comprise the steps: when stake machine drill head excavates the bearing stratum of ground, temporary fixed preformed pile is in the stake hole, and stop to inject gases at high pressure, enlarge the radius of gyration of stake machine drill head; Continue to bore pick downwards to enlarge the stake hole, the diameter in the stake hole after the expansion is greater than the external diameter of preformed pile.By enlarging the radius of gyration of stake machine, build napiform root in the stake hole after expansion, again the stake of preformed pile is held in the expansion napiform root that sinks in the ground, the stake end of preformed pile combines together with bearing stratum, and the stake end has larger bearing capacity with the integrative-structure that enlarges napiform root than prior art like this.
Description of drawings
The Figure of description that consists of the application's a part is used to provide a further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
View when the embodiment king-pile machine drill head that Fig. 1 shows the pick pile sinking construction method for preformed pile of the present invention arrives before the bearing stratum;
View when the embodiment king-pile machine drill head that Fig. 2 shows the pick pile sinking construction method for preformed pile of the present invention excavates the bearing stratum of ground;
Fig. 3 shows and among the embodiment of the pick pile sinking construction method for preformed pile of the present invention preformed pile and bearing stratum is combined together and the fixing view the during step of preformed pile again;
Fig. 4 shows and mentions the view of a machine drill head when finishing construction among the embodiment of the pick pile sinking construction method for preformed pile of the present invention.
The specific embodiment
Need to prove that in the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
The invention provides a kind of embodiment of the pick pile sinking construction method for preformed pile, concrete steps are referring to Fig. 1 to Fig. 4, the preformed pile of present embodiment is illustrated by concrete hollow pile, but the job practices of middle pick pile sinking is not limited to the brill pick pile sinking of concrete hollow pile, and the stake machine drill head in the present embodiment is the stake machine drill head that enlarges the wing with hydraulic pressure, can control its radius of gyration, the middle pick pile sinking construction method of present embodiment specifically may further comprise the steps:
Aim at ground stake heart position, carry out pile sinking, preformed pile 30 is set in an outside of machine drill head 40, and stake machine drill head 40 and auger stem penetrate to the lower end of preformed pile 30 from the upper end of preformed pile 30 ground is bored the pick hole, and the lower end of preformed pile 30 is an end that is deep in the ground.
Stake machine drill head 40 injects gases at high pressure in the formation stake hole that undermines, the brill of preformed pile 30 hollow bulbs pick surflaes enters the Chu Tuxiang of a machine by gases at high pressure and auger stem, and control preformed pile 30 decrease speeds make preformed pile 30 carry out continuously pile sinking synchronously in the process of boring and casting.
Temporary fixed preformed pile 30 when pile sinking extremely designs the depth location that needs, and begin to enlarge a radius of gyration of machine drill head 40, obtain expansion so that bore the pick diameter.The expansion wing by hydraulic open stake machine drill head 40 is rotated and can enlarges a radius of gyration of machine drill head 40.
Before stake machine drill head 40 arrived bearing stratums, stake machine drill head 40 enlarged wing closure state lower time, and the radius of gyration of stake machine drill head 40 is less than the external diameter of preformed pile 30, and specifically referring to Fig. 1, the bearing stratum 20 of ground is positioned at soil layer 10 belows among the figure.
When stake machine drill head 40 excavates the bearing stratum of ground, temporary fixed preformed pile 30 is in the stake hole, and stop to inject gases at high pressure, enlarge the radius of gyration of stake machine drill head 40, and continue boring downwards to enlarge the stake hole, the internal diameter in the stake hole after the expansion is greater than the external diameter of preformed pile 30, and specifically referring to Fig. 2, the bearing stratum 20 of ground is positioned at soil layer 10 belows among the figure.
After confirming that a radius of gyration of machine drill head 40 is extended, injected water mud in the stake hole, when continuing brill pick downwards with expansion stake hole, stake machine drill head 40 stirring bearing stratums mix the grit of bearing stratum fully with cement paste, and finish build stake end expansion napiform root.
Releasing is fixing to preformed pile 30, and preformed pile 30 is sunk to the projected depth place that enlarges napiform root, and preformed pile 30 and bearing stratum are combined together, and fixing preformed pile 30 again, and referring to Fig. 3, the bearing stratum 20 of ground is positioned at soil layer 10 belows among the figure.
When finishing the steady job of preformed pile 30, counter-rotating stake machine drill head 40, stake machine drill head 40 after control enlarges bounces back to normal external diameter and makes a machine drill head 40 continue counter-rotating, then mention a machine drill head 40 and finish construction, referring to Fig. 4, the bearing stratum 20 of ground is positioned at soil layer 10 belows among the figure, wait the fastening devices that enlarges the napiform root cement paste and solidify rear dismounting preformed pile 30.
As can be seen from the above description, the above embodiments of the present invention have realized following technique effect:
1, by enlarging the radius of gyration of stake machine drill head, build napiform root in the stake hole after expansion, the stake end of preformed pile sinks in the stake hole of bearing stratum in the ground, and combine together with bearing stratum, the stake end has larger bearing capacity with the integrative-structure that enlarges napiform root than prior art like this.
2, owing to be to work continuously from pile sinking to building napiform root, even in the geology complicated and changeable such as sandblast occurs easily, construct, the generation of the hole phenomenon that also can prevent from collapsing, and precisely convenient and quality safety is reliable by the more aobvious pile sinking of the visual construction of instrument.
3, because an expansion stake machine drill head excavates and the expansion napiform root is built in bottom slip casting simultaneously, noise is extremely low during construction, vibration is minimum and without mud emission, can not produce simultaneously soil compaction effect harm structure on every side in the work progress, the pile foundation engineering that is fit to very much the city highrise building, realized efficient energy-saving, environmental protection.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (5)

1. pick pile sinking construction method that is used for preformed pile, described preformed pile is set in an outside of machine drill head, described stake machine drill head and auger stem penetrate to the lower end of described preformed pile from the upper end of described preformed pile ground are bored the pick hole, described job practices is injected gases at high pressure when drill bit undermines formation stake hole, the brill pick surflaes of preformed pile hollow bulb enters the Chu Tuxiang of a machine by gases at high pressure and auger stem, and control the subsidence velocity of described preformed pile, described preformed pile is sunk synchronously with the bit drills pick in boring, it is characterized in that, may further comprise the steps:
When described stake machine drill head excavates the bearing stratum of ground, described preformed pile is fixed in the hole temporarily, and stops to inject gases at high pressure, and enlarge the radius of gyration of described stake machine drill head;
Continue to bore pick downwards to enlarge described stake hole, the diameter in the described stake hole after the expansion is greater than the external diameter of described preformed pile.
2. middle pick pile sinking construction method according to claim 1 is characterized in that, and is after the step of the radius of gyration of the described stake of described expansion machine drill head, further comprising the steps of:
The radius of gyration of confirming described stake machine drill head is extended, injected water mud in the stake hole, continue to bore pick downwards when enlarging described stake hole, described stake machine drill head stirs described bearing stratum mixes the grit of described cement paste and described bearing stratum fully, and finishes and build the stake end and enlarge a napiform root.
3. middle pick pile sinking construction method according to claim 2 is characterized in that, builds after the stake end enlarges the step of napiform root described finishing, and is further comprising the steps of:
Releasing is temporary fixed to described preformed pile, and described preformed pile is sunk to the projected depth place of described expansion napiform root, and described preformed pile and described bearing stratum are combined together, and again finishes the fixing of described preformed pile.
4. middle pick pile sinking construction method according to claim 3 is characterized in that, and is after the step of again fixing of described preformed pile, further comprising the steps of:
The described stake machine drill head that reverses, the described stake machine drill head after control enlarges bounces back to normal external diameter and makes described stake machine drill head continue counter-rotating, then mentions described stake machine drill head and finishes construction.
5. middle pick pile sinking construction method according to claim 1, it is characterized in that, before stake machine drill head arrives bearing stratum, according to soil layer hardness and designing requirement, opened in advance the radius of gyration that enlarges described stake machine drill head before described stake machine drill head arrives described bearing stratum, the radius of gyration after described stake machine drill head enlarges is greater than the external diameter of described preformed pile.
CN201310014406.0A 2013-01-15 2013-01-15 Middle pick pile sinking construction method Active CN103061341B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105612290A (en) * 2013-08-14 2016-05-25 包尔特殊基础工程有限公司 Method and device for creating a foundation element in the ground
CN107059871A (en) * 2017-03-08 2017-08-18 沈健龙 The stake equipment of the expansion based on existing stake that a kind of municipal road and bridge engineering is used
CN111997040A (en) * 2020-08-20 2020-11-27 浙江省大成建设集团有限公司 Long spiral drilling thin-wall pipe pile composite pile foundation construction device and construction method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02108724A (en) * 1988-10-14 1990-04-20 Takechi Koumushiyo:Kk Enlarged-dia. hole drilling method and enlarged-dia. knot piling method
JP2001032274A (en) * 1999-07-23 2001-02-06 Kansai Electric Power Co Inc:The Method and device for driving concrete pipe and expansion head
CN101196005A (en) * 2006-12-08 2008-06-11 天津市海恩海洋工程技术服务有限公司 Drill absorption pile structure and construction method thereof
CN202039365U (en) * 2011-03-04 2011-11-16 上海城地建设发展有限公司 Prestressed centrifugal square pipe pile sinking device using central digging hydraulic method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02108724A (en) * 1988-10-14 1990-04-20 Takechi Koumushiyo:Kk Enlarged-dia. hole drilling method and enlarged-dia. knot piling method
JP2001032274A (en) * 1999-07-23 2001-02-06 Kansai Electric Power Co Inc:The Method and device for driving concrete pipe and expansion head
CN101196005A (en) * 2006-12-08 2008-06-11 天津市海恩海洋工程技术服务有限公司 Drill absorption pile structure and construction method thereof
CN202039365U (en) * 2011-03-04 2011-11-16 上海城地建设发展有限公司 Prestressed centrifugal square pipe pile sinking device using central digging hydraulic method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105612290A (en) * 2013-08-14 2016-05-25 包尔特殊基础工程有限公司 Method and device for creating a foundation element in the ground
CN107059871A (en) * 2017-03-08 2017-08-18 沈健龙 The stake equipment of the expansion based on existing stake that a kind of municipal road and bridge engineering is used
CN107059871B (en) * 2017-03-08 2018-12-18 杭州曼京科技有限公司 A kind of expansion stake equipment based on existing stake that municipal administration road and bridge engineering uses
CN111997040A (en) * 2020-08-20 2020-11-27 浙江省大成建设集团有限公司 Long spiral drilling thin-wall pipe pile composite pile foundation construction device and construction method thereof

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Address after: 212413 No. 1-2 Lingang industrial concentration area, Shu Town, Zhenjiang City, Jiangsu, Jurong

Patentee after: Jiangsu Chen Chen machinery equipment manufacturing Limited by Share Ltd

Address before: 212413 No. 1-2 Lingang industrial concentration area, Shu Town, Zhenjiang City, Jiangsu, Jurong

Patentee before: Jiangsu Tangchen Machinery Equipment Manufacturing Co., Ltd.