CN101936004A - Precast expanding pile as well as construction method and construction mechanical equipment thereof - Google Patents

Precast expanding pile as well as construction method and construction mechanical equipment thereof Download PDF

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Publication number
CN101936004A
CN101936004A CN 201010264525 CN201010264525A CN101936004A CN 101936004 A CN101936004 A CN 101936004A CN 201010264525 CN201010264525 CN 201010264525 CN 201010264525 A CN201010264525 A CN 201010264525A CN 101936004 A CN101936004 A CN 101936004A
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pile
hollow
construction
stake
preformed
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CN 201010264525
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张继红
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张继红
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Priority to CN 201010264525 priority Critical patent/CN101936004A/en
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Abstract

The invention relates to a precast expanding pile as well as a construction method and construction mechanical equipment thereof in the field of pile foundation engineering. The construction method of the precast expanding pile of the invention comprises the following steps of: sedimentating a hollow precast pile (2) into a preset depth, wherein the bottom of the hollow precast pile (2) is connected with a pile plug (1); moving away the pile plug (1) and pouring an immature pile body material into the hollow precast pile (2); squeezing the immature pile body material into a soil body at the lower part of the hollow precast pile (2) to form a pile bottom expanding segment (4); and repeating the steps until the pile bottom expanding segment (4) satisfies the requirement. The precast expanding pile obtained through the construction comprises the hollow precast pile (2) at the upper part, the pile bottom expanding segment (4) at the lower part and the pile plug (1) at the bottom, and high-efficiency construction equipment is developed, the pile in the form is convenient to construct, has reliable quality, greatly improves the bearing capacity of the end parts of the precast piles, such as PHC (Prestress High Cement ) tubular pile, hollow square piles, and the like which are widely applied at present and can be used as an pulling and compression resistant bearing pile with high bearing capacity and low manufacture cost.

Description

A kind of prefabricated extruded and extended pile and job practices and construction equipment
Technical field
The present invention relates to pile foundation engineering field in the civil engineering.
Background technology
Pile foundation engineering is one of important component part in the field of civil engineering, engineering piles form commonly used at present mainly contains preformed pile and castinplace pile two big classifications, wherein preformed pile comprises forms such as steel pipe pile, precast square pile, PHC pile tube, pre-stress hollow square pile, be characterized in the prefabricated shaping postposition of engineering piles is gone into the soil body, utilize the stake and the acting in conjunction of soil that resistance to compression, resistance to plucking, bending resistance or horizontal bearing capacity are provided.Castinplace pile comprises forms such as bored pile, tube-sinking cast-in-situ pile, is characterized at first preexisting hole in geotechnical body, pours into the material of body of a pile pile then.Because of stake point bearing stratum or part stake side soil layer intensity height, in all kinds of castinplace piles, can improve bearing capacity of pile foundation with soil body contact surface by enlarging the stake end, for example ring stake, limb disc expanded bore pile all belong to the reaming stake of this type of character.Compare with castinplace pile, preformed pile is the PHC pile tube particularly, has advantages such as speed of application is fast, cost is low, strength of the mixing pile is high, and construction quality is easy to control, is widely used in each field of civil engineering at present.But present preformed pile pile body shape before inserting the soil body is determined, can expand the end improves the preformed pile bearing capacity and has huge engineering practice meaning in preformed pile bottom, the method of at present up-to-date raising prefabricated pile end bearing capacity is for immersed tube bored by elder generation, be pressed into the expanded bore pile that the job practices of precast pile is finished then, but this method has the construction technology complexity, the cost height, the shortcoming of site operation difficult quality control, the method of another kind of raising preformed pile bearing capacity is by at the bottom of the stake, the slip casting of stake side improves the preformed pile bearing capacity, because of preformed pile closely is connected with the soil body by soil compaction after construction, thereby the bearing capacity that improves of this method is little and cost is high, therefore at present efficiently the preformed pile counter-boring techniques be still a blank both domestic and external.
The content of invention
First purpose of the present invention is to provide a kind of prefabricated extruding-enlarging pile construction method, this prefabricated extruding-enlarging pile construction method can form stake end expanding reach when construction, can increase substantially bearing capacity of pile foundation, saves the pile foundation engineering cost significantly, easy construction, reliable in quality.
This prefabricated extruding-enlarging pile construction method may further comprise the steps:
A) determine the stake position, the preformed pile that the bottom is connected with the hollow of stake plug sinks to desired depth;
B) remove the stake plug, and the material of body of a pile that will not condense pours into the preformed pile of hollow;
C) hollow part of the preformed pile by hollow, the material of body of a pile that extruding is not condensed is clamp-oned in the soil body of preformed pile bottom of hollow the material of body of a pile that does not condense, and forms a stake end expanding reach;
D) according to the needs of expanding reach enlarging amplitude at the bottom of the stake, determine whether that the material of body of a pile that will not condense in the repeating step (b) pours into the preformed pile of hollow, and determine whether repeating step (c), an expanding reach construction at the bottom of finishing, meet the demands as expanding reach at the bottom of the stake, then do not need this step.
In above-mentioned prefabricated extruding-enlarging pile construction method, above-mentioned stake plug can be to be positioned over the preformed pile bottom of hollow and can to stop the soil body to enter in the preformed pile of hollow in the piling process to form the precast construction that soil is filled in.
In above-mentioned prefabricated extruding-enlarging pile construction method, above-mentioned stake plug can be to be slightly less than the hollow part of preformed pile of hollow and the tubular structure of bottom opening.
In above-mentioned prefabricated extruding-enlarging pile construction method, the above-mentioned material of body of a pile that does not condense can be the discrete materials such as a kind of or incoagulable rubble in the blended stock of material blendings such as not solidified concrete or the lime that does not condense or the cement that does not condense and rubble, flyash, slag.
Second purpose of the present invention is to provide a kind of prefabricated extruded and extended pile, and this prefabricated extruded and extended pile can be given full play to the potentiality of bearing course at pile end, has increased substantially the bearing capacity of preformed pile, and cost is low.
This prefabricated extruded and extended pile comprises that preformed pile, stake end expanding reach, stake plug three parts of hollow form, and expanding reach is positioned at the preformed pile bottom of hollow at the bottom of its king-pile, an expanding reach bottom at the bottom of the stake plug is positioned at.
In above-mentioned prefabricated extruded and extended pile, can connect by reinforcing bar or steel strand between the preformed pile of above-mentioned stake plug, stake end expanding reach, hollow.
In above-mentioned prefabricated extruded and extended pile, above-mentioned stake plug can be installed on hollow the preformed pile bottom can shutoff hollow the precast pile tip of hollow part of preformed pile.
In above-mentioned prefabricated extruded and extended pile, above-mentioned stake plug can be installed on hollow the preformed pile bottom and can be with respect to the platy structure of the preformed pile activity of hollow.
In above-mentioned prefabricated extruded and extended pile, above-mentioned stake plug can be connected to the preformed pile stake top of hollow by reinforcing bar or steel strand.
In above-mentioned prefabricated extruded and extended pile, can be at the hollow part concrete perfusion of the preformed pile of above-mentioned hollow.
In above-mentioned prefabricated extruded and extended pile, above-mentioned stake end expanding reach is approximate elliposoidal.
The 3rd purpose of the present invention is that the pile machinery that provides a kind of prefabricated extruding-enlarging pile construction method used, this pile machinery can finish the construction of long prefabricated extruded and extended pile of pile body smoothly efficiently, can save construction cost, improves efficiency of construction.
This pile machinery comprises a machine, increases frame, tackling system three parts are formed, and wherein increases chord position in stake machine top, and tackling system is arranged at and increases on the frame.
The squeezed device that provides a kind of prefabricated extruding-enlarging pile construction method used is provided the 4th purpose of the present invention, and this squeezed device is simple in structure, cost is low, easy construction, and pile quality is reliable, can finish the squeezed construction of prefabricated extruded and extended pile smoothly.
This squeezed device is that a shape of cross section is circle, bottom lock, the cylindrical structural of smooth outer surface.
Description of drawings
Fig. 1 is the squeezed preceding pile body structural representation of the used prefabricated extruding-enlarging pile construction method first step of one embodiment of the present of invention;
Fig. 2 is the squeezed preceding pile body structural representation of used prefabricated extruding-enlarging pile construction method second step of one embodiment of the present of invention;
Fig. 3 is a pile body structural representation after the used prefabricated extruding-enlarging pile construction method of one embodiment of the present of invention is finished;
Fig. 4 is the used pile machinery of one embodiment of the present of invention, squeezed device organigram.
The specific embodiment
As an embodiment as shown in Figures 1 to 4 of the present invention, main purpose is to introduce pile machinery used in the structure construction of the prefabricated extruded and extended pile that prefabricated extruding-enlarging pile construction method, squeezed principle, squeezed back form and the squeezed work progress, the structure construction and the operating principle thereof of squeezed device.The first step of the prefabricated extruding-enlarging pile construction method of Jie Shaoing in the present embodiment, after determining the stake position, stake plug (1) is connected in preformed pile (2) bottom of hollow, stake plug (1) can be a solid precast pile tip as shown in Figure 1, it also can be the platy structure that covers preformed pile (2) bottom in hollow, it can also be the tubular structure of bottom opening of hollow part (9) that inserts the preformed pile (2) of hollow, relative position is stablized, the preformed pile (2) that will be connected with the hollow of stake plug (1) then sinks to desired depth, promptly enter the bearing stratum certain depth, as shown in Figure 1.In this step, reduce soil compaction effect in the pile driving process as need, the tubular structure that can adopt bottom opening places the hollow part (9) of the preformed pile (2) of hollow as stake plug (1), after pile sinking is finished, extracts stake plug (1) just can.Thereby finish the first step of prefabricated extruding-enlarging pile construction method of the present invention, enter second step of prefabricated extruding-enlarging pile construction method of the present invention.In second step of prefabricated extruding-enlarging pile construction method, can utilize as shown in Figure 4 squeezed device (3) to pass the hollow part (9) of the preformed pile (2) of hollow, make squeezed device (3) bottom be pressed in the top of stake plug (1), top by knocking or the squeezed device of static pressure (3), stake plug (1) is removed entered the soil body, and bottom the preformed pile (2) of hollow, form hole, extract squeezed device (3) then, the material of body of a pile that does not condense is poured into the hollow part (9) of the preformed pile (2) of hollow, hole is formed on the above-mentioned preformed pile in hollow (2) bottom of filling simultaneously, the material of body of a pile that does not condense can be the concrete that does not condense, or the lime that does not condense, or cement that does not condense and rubble, flyash, a kind of in the blended stock of materials such as slag blendings, or discrete material such as incoagulable rubble.In this step, also can earlier the material of body of a pile that does not condense be poured into the hollow part (9) of the preformed pile (2) of hollow, utilize squeezed device (3) to pass the hollow part (9) of the preformed pile (2) of hollow then, make squeezed device (3) bottom be pressed in the material of body of a pile top of not condensing, by the top of knocking or the squeezed device of static pressure (3), stake plug (1) is removed entered the soil body.Thereby finish second step of prefabricated extruding-enlarging pile construction method of the present invention, enter the 3rd step of prefabricated extruding-enlarging pile construction method of the present invention.In this step, utilization squeezed device (3) as shown in Figure 4 passes the hollow part (9) of the preformed pile (2) of hollow once more, the material of body of a pile that extruding is not condensed, the mode of extruding can be the deadweight that utilizes squeezed device (3) to the material of body of a pile that the does not condense extruding of thumping, also can thump or static pressure at the top of squeezed device (3), the material of body of a pile that does not condense is clamp-oned in the soil body of the preformed pile of hollow (2) bottom, formed stake end expanding reach (4) as shown in Figure 3.Finish the 3rd step of prefabricated extruding-enlarging pile construction method of the present invention, enter the 4th step of prefabricated extruding-enlarging pile construction method of the present invention.As required, continue to increase the squeezed amplitude of stake end expanding reach (4) as need, squeezed device (3) can be extracted, the material of body of a pile that repeats will not condense in second step pours into the hollow part (9) of the preformed pile (2) of hollow, repeats the third step of present embodiment, an expanding reach construction at the bottom of finishing, meet the demands as expanding reach at the bottom of the stake (4), then do not need the operation of this step, in the 4th step of finishing present embodiment, promptly finish prefabricated extruding-enlarging pile construction.In the present embodiment, also can further improve bearing capacity by the condensing of material of body of a pile of stake end expanding reach (4).By the preformed pile (2) of hollow, be positioned at preformed pile (2) the bottom connected stake end expanding reach (4) of hollow and is connected with stake end expanding reach (4) fill in (1) and formed prefabricated extruded and extended pile jointly.Thereby finish prefabricated extruding-enlarging pile construction of the present invention.In the present embodiment, be the situation of more piece stake to the preformed pile (2) of hollow, in order to improve efficiency of construction, reduce construction cost, can make pile machinery as shown in Figure 4.In pile machinery as shown in Figure 4, at the top of stake machine (5) installation increasing frame (6), increasing upward installation tackling system (7) of frame (6), so just, can pass through the quick lifting of tackling system (7), place the squeezed device (3) longer than the preformed pile (2) of single-unit hollow, thereby raising efficiency of construction, stake machine (5) can be a static pile press, also can be pile driver.In the present embodiment, the preformed pile of hollow (2) can be the PHC pile tube, also can be hollow square pile, and squeezed device (3) is that a shape of cross section is approximately circle, bottom lock, the cylindrical structural of smooth outer surface.In the present embodiment, in order further to improve stake plug (1), stake end expanding reach (4), bonding strength between the preformed pile of hollow (2), also can fill in connecting reinforcement or steel strand (8) are set on (1) in stake, avoid destruction when constructing with the 3rd step to connecting reinforcement or steel strand (8) in second step of above-mentioned prefabricated extruding-enlarging pile construction method, the prefabricated extruded and extended pile globality that forms after construction is finished is stronger, as connecting reinforcement or steel strand (8) are connected the stake top of preformed pile (2) always to hollow, then connecting reinforcement or steel strand (8) just can be used as the tensile structure use, and the anti-pulling capacity of the prefabricated extruded and extended pile of this kind will be greatly improved.In the present embodiment, can also after expanding reach at the bottom of the stake (4) construction is finished, continuation pour into the material of body of a pile that does not condense, can further improve pile structural strength to the hollow part (9) of the preformed pile (2) of hollow.
This patent includes but not limited to other job practicess of the alternative use of professional person in this area.

Claims (13)

1. prefabricated extruding-enlarging pile construction method is characterized in that this prefabricated extruding-enlarging pile construction method may further comprise the steps:
A) determine the stake position, the preformed pile (2) that the bottom is connected with the hollow of stake plug (1) sinks to desired depth;
B) remove stake plug (1), and the material of body of a pile that will not condense pours into the preformed pile (2) of hollow;
C) hollow part (9) of the preformed pile (2) by hollow, the material of body of a pile that extruding is not condensed is clamp-oned in the soil body of the preformed pile of hollow (2) bottom the material of body of a pile that does not condense, and forms a stake end expanding reach (4);
D) according to the needs of expanding reach at the bottom of the stake (4) enlarging amplitude, determine whether that the material of body of a pile that will not condense in the repeating step (b) pours into the preformed pile (2) of hollow, and determine whether repeating step (c), expanding reach (a 4) construction at the bottom of finishing, meet the demands as expanding reach at the bottom of the stake (4), then do not need this step.
2. prefabricated extruding-enlarging pile construction method according to claim 1 is characterized in that above-mentioned stake plug (1) can be preformed pile (2) bottom that is positioned over hollow and can stop the soil body to enter in the preformed pile (2) of hollow to form native precast construction of filling in the piling process.
3. prefabricated extruding-enlarging pile construction method according to claim 1 is characterized in that above-mentioned stake plug (1) can be the hollow part (9) of the preformed pile (2) that is slightly less than hollow and the tubular structure of bottom opening.
4. prefabricated extruding-enlarging pile construction method according to claim 1 is characterized in that the above-mentioned material of body of a pile that does not condense can be the discrete materials such as a kind of or incoagulable rubble in the blended stock of material blendings such as not solidified concrete or the lime that does not condense or the cement that does not condense and rubble, flyash, slag.
5. prefabricated extruded and extended pile, it is characterized in that this prefabricated extruded and extended pile comprises preformed pile (2), stake end expanding reach (4), stake plug (1) the three part composition of hollow, expanding reach at the bottom of its king-pile (4) is positioned at preformed pile (2) bottom of hollow, expanding reach (a 4) bottom at the bottom of stake plug (1) is positioned at.
6. prefabricated extruded and extended pile according to claim 5 is characterized in that can connecting by reinforcing bar or steel strand (8) between the preformed pile (2) of above-mentioned stake plug (1), stake end expanding reach (4), hollow.
7. prefabricated extruded and extended pile according to claim 5, it is characterized in that above-mentioned stake plug (1) can be preformed pile (2) bottom that is installed on hollow can shutoff hollow the precast pile tip of hollow part (9) of preformed pile (2).
8. prefabricated extruded and extended pile according to claim 5 is characterized in that above-mentioned stake plug (1) can be preformed pile (2) bottom that is installed on hollow and platy structure that can be movable with respect to the preformed pile (2) of hollow.
9. prefabricated extruded and extended pile according to claim 5 is characterized in that above-mentioned stake plug (1) can be connected to preformed pile (2) the stake top of hollow by reinforcing bar or steel strand (8).
10. prefabricated extruded and extended pile according to claim 5, it is characterized in that can be at hollow part (9) concrete perfusion of the preformed pile (2) of above-mentioned hollow.
11. prefabricated extruded and extended pile according to claim 5 is characterized in that above-mentioned stake end expanding reach (4) is approximate elliposoidal.
12. pile machinery that prefabricated extruding-enlarging pile construction method is used, it is characterized in that this pile machinery comprises a machine (5), increases frame (6), tackling system (7) three parts are formed, wherein increase frame (6) and be positioned at a machine (5) top, tackling system (7) is arranged at and increases on the frame (6).
13. the squeezed device that prefabricated extruding-enlarging pile construction method is used is characterized in that this squeezed device (3) is that a shape of cross section is circle, bottom lock, the cylindrical structural of smooth outer surface.
CN 201010264525 2010-08-25 2010-08-25 Precast expanding pile as well as construction method and construction mechanical equipment thereof Pending CN101936004A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103132522A (en) * 2011-11-23 2013-06-05 中国建筑第七工程局有限公司 Shallow thick mud layer soft soil area driven pile construction method
CN103452100A (en) * 2013-08-20 2013-12-18 河北建设勘察研究院有限公司 Construction method of post-grouting squeezing and expanding combination cast-in-place bored pile
CN104727309A (en) * 2015-02-02 2015-06-24 中国电力工程顾问集团中南电力设计院有限公司 Construction technology of squeeze-in expanded-base pipe pile
CN108193683A (en) * 2018-02-01 2018-06-22 华洲建设温州有限公司 The processing method and foundation structure of deep foundation base

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2401594Y (en) * 2000-01-17 2000-10-18 张立军 Drop hammer pile driver
CN1749484A (en) * 2005-10-17 2006-03-22 卫龙武 Construction method for prefabricated tubular pile with expanding head
CN2921106Y (en) * 2006-07-10 2007-07-11 张厚 Hydraulic pipe-jacking perforating equipment
CN201148617Y (en) * 2008-01-21 2008-11-12 东莞市桦业土木基础工程有限公司 Wrapping opening-shaped pile tip
CN201762705U (en) * 2010-08-25 2011-03-16 张继红 Prefabricated extruding and expanding pile

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2401594Y (en) * 2000-01-17 2000-10-18 张立军 Drop hammer pile driver
CN1749484A (en) * 2005-10-17 2006-03-22 卫龙武 Construction method for prefabricated tubular pile with expanding head
CN2921106Y (en) * 2006-07-10 2007-07-11 张厚 Hydraulic pipe-jacking perforating equipment
CN201148617Y (en) * 2008-01-21 2008-11-12 东莞市桦业土木基础工程有限公司 Wrapping opening-shaped pile tip
CN201762705U (en) * 2010-08-25 2011-03-16 张继红 Prefabricated extruding and expanding pile

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103132522A (en) * 2011-11-23 2013-06-05 中国建筑第七工程局有限公司 Shallow thick mud layer soft soil area driven pile construction method
CN103132522B (en) * 2011-11-23 2015-07-22 中国建筑第七工程局有限公司 Shallow thick mud layer soft soil area driven pile construction method
CN103452100A (en) * 2013-08-20 2013-12-18 河北建设勘察研究院有限公司 Construction method of post-grouting squeezing and expanding combination cast-in-place bored pile
CN104727309A (en) * 2015-02-02 2015-06-24 中国电力工程顾问集团中南电力设计院有限公司 Construction technology of squeeze-in expanded-base pipe pile
CN108193683A (en) * 2018-02-01 2018-06-22 华洲建设温州有限公司 The processing method and foundation structure of deep foundation base
CN108193683B (en) * 2018-02-01 2020-02-14 华洲建设温州有限公司 Deep foundation treatment method and foundation structure

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