CN202543908U - Extruding and enlarging device of slip casting enlarged cast-in-situ bored pile - Google Patents

Extruding and enlarging device of slip casting enlarged cast-in-situ bored pile Download PDF

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Publication number
CN202543908U
CN202543908U CN2012201609511U CN201220160951U CN202543908U CN 202543908 U CN202543908 U CN 202543908U CN 2012201609511 U CN2012201609511 U CN 2012201609511U CN 201220160951 U CN201220160951 U CN 201220160951U CN 202543908 U CN202543908 U CN 202543908U
Authority
CN
China
Prior art keywords
extruding
steel pipe
flange
slip casting
enlarging
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2012201609511U
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Chinese (zh)
Inventor
胡玉银
孔德志
阳吉宝
陈建兰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai City No4 Building Co Ltd
Shanghai Construction Group Design Institute Co Ltd
Shanghai Construction No 4 Group Co Ltd
Original Assignee
Shanghai City No4 Building Co Ltd
Shanghai Construction Group Design Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai City No4 Building Co Ltd, Shanghai Construction Group Design Institute Co Ltd filed Critical Shanghai City No4 Building Co Ltd
Priority to CN2012201609511U priority Critical patent/CN202543908U/en
Application granted granted Critical
Publication of CN202543908U publication Critical patent/CN202543908U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses an extruding and enlarging device of a slip casting enlarged cast-in-situ bored pile, which comprises a flange, wherein a plurality of annularly distributed constructional reinforcements are vertically arranged on the flange, a steel tube enclosed among the constructional reinforcements is vertically welded on the flange, a slip casting floral tube is wound to be clung to the steel tube, a cylindrical geotextile bag positioned between the steel tube and the constructional reinforcements and used for wrapping the bottom end of the slip casting floral tube is sleeved outside the steel tube, and the upper end and the lower end of the geotextile bag are fixed on the steel tube through hose clamps. The extruding and enlarging device has a simple structure, is convenient and practical, embodies the advantages of the traditional extruding and enlarging pile, and can be suitable for regions with multiple kinds of soil layers without being influenced by adverse factors such as hole collapse; and the construction process is simple, a large mechanical extruding and enlarging device is not needed, the slip casting stability is good, slurry can be controlled without loss, and the bearing capacity is remarkably increased.

Description

Injection forming expands the extruding-spreading device of subdrilling hole pouring pile
Technical field
The utility model relates to the realm of building construction, specifically is the extruding-spreading device that a kind of injection forming expands the subdrilling hole pouring pile.
Background technology
Existing grouting behind shaft or drift lining technology after the bored pile concreting, is injected stake side soil layer to improve a kind of technology of pile side friction through pre-buried pipe with cement mortar through on stake side different depth place reinforcing cage, burying the high-pressure slip-casting flexible pipe underground.According to the result of some tests, think can reach reasonable effect after the back mud jacking is handled, can improve 30%~70% to the bearing capacity of single pile in the fine grained soils; To the stake in the coarse-grained soil, amplification can reach 60%~120%.Side frictional resistance effect behind the mud jacking shows as side friction and improves the shearing rigidity raising native with the stake side; Thereby after the shift value when frictional resistance is given full play to moved, this toughness that just means stake increased.But also there is weak point in stake rear flank slurry injection technique, and promptly the flow path of uncontrollable slurries is prone to the slurry phenomenon takes place to run, and reliability is poor.
Existing expanded bore pile often need adopt special plant equipment to expand end pore-forming; Thereby reach the purpose that improves the pile body uplift resistance; But expand the complex process at the end; Construction cost is high, also is a major reason that causes existing expanded bore pile to be difficult to promote owing to the hole phenomenon of collapsing that causes after the soil body reaming causes the pile quality instability simultaneously.
The utility model content
The utility model purpose is: to the problems referred to above; Propose a kind of injection forming expand the subdrilling hole pouring pile extruding-spreading device; This apparatus structure is simple, convenient and practical; The injection forming that uses this device to obtain expands the advantage that the subdrilling hole pouring pile has not only embodied existing extruded and extended pile, also is to be applicable to multiple soil layer area, the influence of the unfavorable factors such as hole of not collapsed.
The technical scheme of the utility model is: described extruding-spreading device; Comprise flange; The some distributing bars that distribute ringwise vertically are set on this flange; Also vertical welding one velamen is trapped among the steel pipe between the said distributing bar on this flange; The outer wall of being close to said steel pipe is wound with grouting tube, outside steel pipe, also be with one between steel pipe and distributing bar and the grouting tube bottom is wrapped in cylindrical geotechnological cloth bag, this geotechnique's cloth bag all is fixed on the steel pipe through the larynx hoop at two ends up and down.
The top of said geotechnological cloth bag is apart from the top 100mm~200mm of steel pipe.
The length of said steel pipe is 2m~4m.
Said flange diameter is than the big 100mm of diameter of steel tube, and the diameter of distributing bar is 12mm~14mm.
Said distributing bar has 10~20.
The utility model has the advantages that: the utility model is on the basis of conventional borehole construction process of bored concrete pile; On cage at the bottom of the former reinforcing cage, increased an extruding-spreading device; Utilize this extruding-spreading device to come injection forming to expand the subdrilling hole pouring pile; It adopts existing grouting behind shaft or drift lining technology, uses slurries that the squeezed encryption effect of surrounding soil is improved the uplift resistance of stake simultaneously again, and is applicable to multiple soil layer area.Not only embody the advantage of existing extruded and extended pile, also be to be applicable to multiple soil layer area, the influence of the unfavorable factors such as hole of not collapsed; Construction technology is simple simultaneously, need not the squeezed equipment of big machinery formula, the slip casting good stability; Slurries can be controlled, and do not run slurry, and bearing capacity improves obviously.The injection forming squeezing-close bottom-enlarging filling pile that obtains is a kind of stake type of new and effective, economic and reliable.
Description of drawings
Below in conjunction with accompanying drawing and specific embodiment the utility model is done further to introduce:
Fig. 1 is the structural representation of the utility model embodiment extruding-spreading device;
Fig. 2 is the structural representation of flange among the utility model embodiment;
Fig. 3 is that extruding-spreading device docks sketch map with cage at the bottom of the reinforcing cage among the utility model embodiment, the overlap joint section of cage at the bottom of sector table steel tube among Fig. 3 between two dotted lines and the reinforcing cage;
Fig. 4 is the sketch map in casting and compacting of concrete stage among the utility model embodiment;
Fig. 5 is the sketch map that geotechnological cloth bag expands the stage among the utility model embodiment
Wherein: 1-flange, 2-distributing bar, 3-steel pipe, 4-geotechnique cloth bag, 5-larynx hoop, 6-grouting tube, cage at the bottom of the 7-reinforcing cage.
The specific embodiment
As shown in Figure 1, the extruding-spreading device of present embodiment comprises flange 1, and the structure of this flange is as shown in Figure 2, vertically is provided with 20 distributing bars 2 that distribute ringwise on it.During concrete the utilization, 2 pairs of extruding-spreading device surrounding concretes of these 20 distributing bars play reinforced action, the preferred 12~14mm of the diameter of distributing bar 2.Also be welded with a vertical steel pipe 3 of arranging on the flange 1; This steel pipe 3 is enclosed in (every distributing bar all is positioned at this steel pipe outside) between said 20 distributing bars 2; Preferred 2~the 4m of the length of steel pipe 3; The diameter of steel pipe 3 will adapt with the diameter of flange 1, and general diameter of steel tube is than the little 100mm of flange diameter.The outer wall of being close to said steel pipe 2 is wound with grouting tube 6, and grouting tube 6 becomes the shape of threads coiling on steel pipe.Outside steel pipe 2, also be with a cylindrical geotechnological cloth bag 4 (geotechnological cloth bag open at both ends) between steel pipe 3 and 20 distributing bars 2; Grouting tube 6 bottoms are wrapped in the inside of this geotechnique's cloth bag 4; So that slip casting in geotechnological cloth bag; The diameter of geotechnique's cloth bag 4 is greater than stake footpath (diameter of castinplace pile) 200~300mm, thereby geotechnological cloth bag all is fixed on the steel pipe 3 with larynx hoop 5 bandings at two ends about in the of 4.
In addition, in the present embodiment, the top of geotechnological cloth bag 4 is apart from the top 100~200mm of steel pipe 3, the top of steel pipe 3 reserve this 100~200mm that comes be used for reinforcing cage at the bottom of cage 7 butt joints.
The preparation method of above-mentioned extruding-spreading device can be divided into selection and go on foot greatly with making two, is specially:
1) selection: flange, 20 distributing bars, steel pipe, cylindrical geotechnological cloth bag, grouting floral tube;
2) make: be fixed on 20 distributing bars 2 on the flange 1; Geotechnological cloth bag 4 is enclosed within outside the steel pipe 3; Two ends are with larynx hoop 5 bandings up and down; Be positioned at the middle breach that stays a 25mm of larynx hoop of top, pass for grouting tube 6 and stretch into geotechnological cloth bag 4 inside, grouting tube 6 becomes the shape of threads coiling on steel pipe 3; In the welding of steel pipe 3 bottoms, have the flange 1 of distributing bar 2 at last, extruding-spreading device is accomplished.
The processing and making process of this extruding-spreading device adopts batch production processing prefabricated, directly hangs the scene during use, docks with cage at the bottom of the reinforcing cage and is welded into an integral body.
Present embodiment also discloses a kind of job practices of using above-mentioned extruding-spreading device injection forming to expand the subdrilling hole pouring pile, and this method may further comprise the steps:
Step 1, as shown in Figure 3 is docked steel pipe 2 tops of said extruding-spreading device and cage at the bottom of the reinforcing bar 7 with welding manner, make extruding-spreading device and reinforcing bar at the bottom of cage 7 in aggregates;
Step 2, as shown in Figure 4 is utilized conventional borehole construction process of bored concrete pile pore-forming, will have at the bottom of the reinforcing bar of said extruding-spreading device cage 7 and transfer and put in place, and in the boring concrete perfusion;
Step 3, as shown in Figure 5; After concrete curing a period of time (preferred 6~8 hours); Begin cement injection in grouting tube 6 (preferred p42.5 cement paste), the geotechnological cloth bag 4 of extruding-spreading device forms full cylindrical slip casting bag structure under the filling of cement paste, and its diameter is along with the injection of the cement grout expansion of constantly expanding; Push surrounding concrete thereupon and encrypt surrounding soil; A final formation stake end enlarged footing, thus increased substantially the native interlocking of stake, improved the bearing capacity of uplift pile.
In order to make slip casting effect better, present embodiment has also carried out FOUR EASY STEPS, i.e. step 4: after the slip casting first time finishes 0.5~2h, carry out the slip casting second time.
Certainly, the foregoing description only is the technical conceive and the characteristics of explanation the utility model, and its purpose is the content that lets people can understand the utility model and implements according to this, can not limit the protection domain of the utility model with this.All equivalent transformation or modifications of doing according to the spirit of the utility model main technical schemes all should be encompassed within the protection domain of the utility model.

Claims (5)

1. an injection forming expands the extruding-spreading device of subdrilling hole pouring pile; It is characterized in that: it comprises flange (1); The some distributing bars (2) that distribute ringwise vertically are set on this flange (1); This flange (1) is gone up also vertical welding one velamen and is trapped among the steel pipe (3) between the said distributing bar (2); The outer wall of being close to said steel pipe (2) is wound with grouting tube (6), outside steel pipe (2), also is with one and is positioned between steel pipe (3) and the distributing bar (2) and cylindrical geotechnological cloth bag (4) that grouting tube (6) bottom is wrapped in, and this geotechnique's cloth bag (4) two ends up and down all is fixed on the steel pipe (3) through larynx hoop (5).
2. injection forming according to claim 1 expands the extruding-spreading device of subdrilling hole pouring pile, and it is characterized in that: the top of said geotechnological cloth bag (4) is apart from the top 100mm~200mm of steel pipe (3).
3. injection forming according to claim 1 expands the extruding-spreading device of subdrilling hole pouring pile, and it is characterized in that: the length of said steel pipe (3) is 2m~4m.
4. injection forming according to claim 1 expands the extruding-spreading device of subdrilling hole pouring pile, and it is characterized in that: said flange (1) diameter is than the big 100mm of steel pipe (3) diameter, and the diameter of distributing bar (2) is 12mm~14mm.
5. injection forming according to claim 1 expands the extruding-spreading device of subdrilling hole pouring pile, and it is characterized in that: said distributing bar (2) has 10~20.
CN2012201609511U 2012-04-16 2012-04-16 Extruding and enlarging device of slip casting enlarged cast-in-situ bored pile Expired - Fee Related CN202543908U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012201609511U CN202543908U (en) 2012-04-16 2012-04-16 Extruding and enlarging device of slip casting enlarged cast-in-situ bored pile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012201609511U CN202543908U (en) 2012-04-16 2012-04-16 Extruding and enlarging device of slip casting enlarged cast-in-situ bored pile

Publications (1)

Publication Number Publication Date
CN202543908U true CN202543908U (en) 2012-11-21

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102605773A (en) * 2012-04-16 2012-07-25 上海市建工设计研究院有限公司 Construction method of slip-casting expanded-base cast-in-situ bored pile and extruding-extending device thereof
CN102943465A (en) * 2012-11-26 2013-02-27 李晓军 Drilling-free forming pile based on radial pressurization and construction method and application thereof
CN103233467A (en) * 2013-04-02 2013-08-07 中冶交通工程技术有限公司 Construction method for expanded-base cast-in-place piles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102605773A (en) * 2012-04-16 2012-07-25 上海市建工设计研究院有限公司 Construction method of slip-casting expanded-base cast-in-situ bored pile and extruding-extending device thereof
CN102605773B (en) * 2012-04-16 2014-08-13 上海市建工设计研究院有限公司 Construction method of slip-casting expanded-base cast-in-situ bored pile and extruding-extending device thereof
CN102943465A (en) * 2012-11-26 2013-02-27 李晓军 Drilling-free forming pile based on radial pressurization and construction method and application thereof
CN103233467A (en) * 2013-04-02 2013-08-07 中冶交通工程技术有限公司 Construction method for expanded-base cast-in-place piles

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C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20121121

Termination date: 20150416

EXPY Termination of patent right or utility model