CN203129129U - Slip casting expanded bottom pile and bottom-expanding device - Google Patents
Slip casting expanded bottom pile and bottom-expanding device Download PDFInfo
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- CN203129129U CN203129129U CN 201320070187 CN201320070187U CN203129129U CN 203129129 U CN203129129 U CN 203129129U CN 201320070187 CN201320070187 CN 201320070187 CN 201320070187 U CN201320070187 U CN 201320070187U CN 203129129 U CN203129129 U CN 203129129U
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- cloth bag
- geotechnological cloth
- reinforcing cage
- pile
- grouting pipe
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Abstract
The utility model discloses a slip casting expanded bottom pile and a bottom-expanding device, wherein the bottom-expanding device comprises a geotechnical cloth bag and a grouting pipe. The geotechnical cloth bag is arranged on the outer side of the bottom of a reinforcing cage in a sleeved mode. The upper end and the lower end of the geotechnical cloth bag are fixed with the bottom of the reinforcing cage. The middle of the geotechnical cloth bag is fastened through a plurality of elastic cords. One end of the grouting pipe is inserted into the geotechnical cloth bag. Further disclosed is the slip casting expanded bottom pile. The reinforcing cage provided with the bottom-expanding device at the bottom is put downwards in place due to the fact that the bottom-expanding device is arranged on the outer side of the bottom of the reinforcing cage, concrete is grouted into the reinforcing cage, slip casting is started to be carried out after concrete curing, a plump cylindrical grouting bag structural body is formed under the condition that grout is filled in the geotechnical cloth bag of the bottom-expanding device, and the diameter of the plump cylindrical grouting bag structural body is continuously expanded and enlarged along with pouring of the grout. Then, the concrete around the plump cylindrical grouting bag structural body is extruded, and a soil body around the plump cylindrical grouting bag structural body is thickened. Finally, a pile end expanding head is formed. Therefore, occlusion capacity of pile soil and bearing capacity of the pile are greatly improved.
Description
Technical field
The utility model relates to the realm of building construction, is a kind of injection forming expanded bore pile and expansion end device of suitable bored pile.
Background technology
Existing grouting behind shaft or drift lining technology is by burying the high-pressure slip-casting flexible pipe underground at stake side different depth place reinforcing cage, after the bored pile concreting, by pre-buried pipe cement mortar to be injected stake side soil layer to improve a kind of technology of pile side friction.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%.The shearing rigidity that side frictional resistance effect behind the mud jacking shows as side friction raising and stake side soil improves; 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 namely the flow path of uncontrollable slurries easily takes place to run the slurry phenomenon, and reliability is poor.
Existing expanded bore pile often needs to 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, the construction cost height 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.
Though, open on 07 25th, 2012, document number is the Chinese utility model patent of CN102605773, job practices and the extruding-spreading device thereof of injection forming expansion subdrilling hole pouring pile are disclosed, this a kind of extruding-spreading device, comprise flange, the some distributing bars that distribute ringwise vertically are set on this flange, on this flange also vertical welding one velamen be trapped among steel pipe between the described distributing bar, the outer wall of being close to described 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 interior cylindrical geotechnological cloth bag, and this geotechnique's cloth bag all is fixed on the steel pipe by the larynx hoop at two ends up and down.This shows, in this technical scheme, need a steel pipe, need earlier steel pipe to be welded on the bottom of reinforcing cage, and then geotechnological cloth bag is enclosed within the steel pipe outside, structure more complicated, construction technology are also more loaded down with trivial details.
Therefore, how to provide a kind of construction technology simple, convenient, can increase substantially the native interlocking of stake, improving the injection forming expanded bore pile of bearing capacity and expanding end device is the technical problem that those skilled in the art need to be resolved hurrily.
The utility model content
The purpose of this utility model is to provide a kind of injection forming expanded bore pile and expands end device, and its construction technology is simple, can increase substantially the native interlocking of stake, improves bearing capacity.
To achieve the above object, the utility model adopts following technical scheme:
Device at the bottom of a kind of expansion, comprise geotechnological cloth bag and Grouting Pipe, described geotechnological cloth bag is sheathed on the bottom outside of reinforcing cage, the upper and lower end of described geotechnological cloth bag fixes with the bottom of described reinforcing cage respectively, tighten with some roads elastic cord the middle part of described geotechnological cloth bag, described geotechnological cloth bag integral body is hollow cylinder, described geotechnological cloth bag is double-decker at least, goes up lower sealing and have one at least for the inner chamber that holds injection slurry, one end of described Grouting Pipe is connected with described geotechnological cloth bag, the external slip casting of the other end of described Grouting Pipe source.
Preferably, in device at the bottom of the above-mentioned expansion, the cuff cloth bag is offered on the top of described geotechnological cloth bag, and the top of described cuff cloth bag has the opening for the end insertion of described Grouting Pipe, and the bottom of described cuff cloth bag is communicated with the inner chamber of described geotechnological cloth bag.
Preferably, in device at the bottom of the above-mentioned expansion, the quantity of described cuff cloth bag is two.
Preferably, in device at the bottom of the above-mentioned expansion, an end of described Grouting Pipe arranges a slurry casting machine that has an injected hole.
Preferably, in device at the bottom of the above-mentioned expansion, described cuff cloth bag is arranged at the middle and upper part of described geotechnological cloth bag.
Preferably, in device at the bottom of the above-mentioned expansion, the diameter of described geotechnological cloth bag is than the big 200-300mm of diameter of described reinforcing cage.
Preferably, in device at the bottom of the above-mentioned expansion, described Grouting Pipe is iron pipe.
The invention also discloses a kind of injection forming expanded bore pile, it forms by being equipped with to build as the reinforcing cage of device at the bottom of any described expansion in the claim 1 ~ 7.
The injection forming expanded bore pile that the utility model provides and expansion end device, expand end device by the arranged outside in the bottom of reinforcing cage, the bottom is had the reinforcing cage that expands end device transfers and puts in place, and concrete perfusion inward, Deng beginning slip casting after the concrete curing, the geotechnological cloth bag that expands end device forms full cylindrical slip casting bag structure under the filling of cement paste, its diameter is along with the injection of the cement grout expansion of constantly expanding, push surrounding concrete thereupon and encrypt surrounding soil, the final stake end enlarged footing that forms, the injection forming expanded bore pile has not only embodied the advantage of existing expanded bore 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, bearing capacity improves obviously, is a kind of new and effective, the economic type of stake reliably.
The utility model provides a kind of novel stake type, adopt existing grouting behind shaft or drift lining technology, utilize the boundary constraint control slurries of geotechnological cloth bag simultaneously, can reach regular flowing, both filling the space of stake between the soil, by slurries surrounding soil is produced compacted effect and invigoration effect again, thereby reach the purpose that improves the stake anti-pulling capacity, this new stake type goes for multiple soil layer area.
Description of drawings
Injection forming expanded bore pile of the present utility model and expansion end device are provided by following embodiment and accompanying drawing.
Fig. 1 is the structural representation of device at the bottom of the expansion of the present utility model;
Fig. 2 is the A-A cross-sectional schematic of Fig. 1;
Fig. 3 A is injection forming expanded bore pile of the present utility model at the step of job practices structural representation for the moment;
Fig. 3 B is the schematic top plan view of Fig. 3 A;
Fig. 4 is the structural representation of notes injection forming expanded bore pile of the present utility model when the step 2 of job practices;
Fig. 5 is the structural representation of injection forming expanded bore pile of the present utility model when the step 3 of job practices;
Among the figure, 1-geotechnique cloth bag, 11-internal layer, 12-skin, 2-Grouting Pipe, 3-cuff cloth bag, 4-reinforcing cage, 5-rope, 6-elastic cord, 7-slurry casting machine.
The specific embodiment
Below with reference to accompanying drawings the utility model is described in more detail, has wherein represented preferred embodiment of the present utility model, should be appreciated that those skilled in the art can revise the utility model described here and still realize the beneficial effects of the utility model.Therefore, following description is appreciated that extensively knowing for those skilled in the art, and not as to restriction of the present utility model.
For clear, whole features of practical embodiments are not described.In the following description, be not described in detail known function and structure, the confusion because they can make the utility model owing to unnecessary details.Will be understood that in the exploitation of any practical embodiments, must make a large amount of implementation details to realize developer's specific objective, for example according to relevant system or relevant commercial restriction, change into another embodiment by an embodiment.In addition, will be understood that this development may be complicated and time-consuming, but only be routine work to those skilled in the art.
For the purpose of this utility model, feature are become apparent, below in conjunction with accompanying drawing the specific embodiment of the present utility model is further described.It should be noted that accompanying drawing all adopts very the form of simplifying and all uses non-ratio accurately, only in order to convenient, the purpose of aid illustration the utility model embodiment lucidly.
See also 1 and Fig. 2, and please in conjunction with Fig. 3 A, present embodiment provides a kind of injection forming expanded bore pile, it is built and forms by the reinforcing cage that expands end device is installed.Device at the bottom of the described expansion, the bottom that is arranged at reinforcing cage 4 is the outside of cage at the bottom of the reinforcing bar, device comprises geotechnological cloth bag 1 and Grouting Pipe 2 at the bottom of the described expansion, described geotechnological cloth bag 1 is sheathed on the bottom outside of reinforcing cage 4, the diameter of described geotechnological cloth bag is than the big 200-300mm of diameter of described reinforcing cage, on the described geotechnological cloth bag 1, the lower end respectively with the bottom of described reinforcing cage 4 by being iron wire in the rope 5(present embodiment) fix, described geotechnological cloth bag 1 integral body is hollow cylinder, described geotechnological cloth bag 1 is double-decker at least, last lower sealing and have an inner chamber that is used for holding injection slurry at least is that described geotechnological cloth bag is sealed by upper and lower port by internal layer 11 and outer 12 and connects to form in the present embodiment.Tighten with some roads elastic cord 6 middle part of described geotechnological cloth bag 1, because elastic cord 6 is flexible, therefore, geotechnological cloth bag 1 can distending in the process of slip casting, one end of described Grouting Pipe 2 inserts in the described geotechnological cloth bag 1, the external slip casting of the other end of described Grouting Pipe 2 source.
Preferable, in the present embodiment, cuff cloth bag 3 is offered on the top of described geotechnological cloth bag 1, and the top of described cuff cloth bag 3 has the opening for the end insertion of described Grouting Pipe 2, and the bottom of described cuff cloth bag 3 is communicated with the inner chamber of described geotechnological cloth bag 1.
Preferable, in the present embodiment, the quantity of described cuff cloth bag 3 is two, so setting can be so that cement paste flows in the geotechnological cloth bag 1 more evenly, reposefully.Further preferred, described cuff cloth bag 3 is arranged at the middle and upper part of described geotechnological cloth bag.So arrange and further to make cement paste flow into more evenly, reposefully in the geotechnological cloth bag 1.
Preferable, in the present embodiment, an end of described Grouting Pipe 2 is provided with the slurry casting machine 7 of injected hole, so that cement paste evenly flows in the geotechnological cloth bag 1.
Preferable, in the present embodiment, described Grouting Pipe 2 is iron pipe.
See also Fig. 1 to Fig. 5, the job practices of the injection forming expanded bore pile of present embodiment comprises the steps:
Step 1-1 is enclosed within described geotechnological cloth bag 1 on the bottom of reinforcing cage 4, and the bottom of the bottom of described geotechnological cloth bag 1 and reinforcing cage 4 reserves the distance of 500mm, and anti-slurry smoothly when being beneficial to follow-up concreting is taken pile bottom sediment out of;
Step 1-2 adopts rope 5 that the upper and lower end of described geotechnological cloth bag 1 and the bottom of reinforcing cage 4 are fixed, and the middle part of described geotechnological cloth bag 1 adopts some roads elastic cord 6 to tighten, and makes that the bottom of geotechnological cloth bag 1 and reinforcing cage 4 is closely connected;
Preferably, in the job practices of above-mentioned injection forming expanded bore pile, described cement paste adopts P42.5 cement.PO42,5 refer to the Portland cement strength grade, and 28 days compressive strength standard that are exactly Portland cement are not less than 42.5 MPas.
In sum, the injection forming expanded bore pile that the utility model provides and expansion end device, expand end device by the arranged outside in the bottom of reinforcing cage, the bottom is had the reinforcing cage that expands end device transfers and puts in place, and concrete perfusion inward, Deng beginning slip casting after the concrete curing, the geotechnological cloth bag that expands end device forms full cylindrical slip casting bag structure under the filling of cement paste, its diameter is along with the injection of the cement grout expansion of constantly expanding, push surrounding concrete thereupon and encrypt surrounding soil, the final stake end enlarged footing that forms, the injection forming expanded bore pile has not only embodied the advantage of existing expanded bore pile, also is 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, do not run slurry, bearing capacity improves obviously, is a kind of new and effective, the economic type of stake reliably.
The utility model provides a kind of novel stake type, adopt existing grouting behind shaft or drift lining technology, utilize the boundary constraint control slurries of geotechnological cloth bag simultaneously, can reach regular flowing, both filling the space of stake between the soil, by slurries surrounding soil is produced compacted effect and invigoration effect again, thereby reach the purpose that improves the stake anti-pulling capacity, this new stake type goes for multiple soil layer area.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.
Claims (8)
1. one kind is expanded end device, it is characterized in that, comprise geotechnological cloth bag and Grouting Pipe, described geotechnological cloth bag is sheathed on the bottom outside of reinforcing cage, the upper and lower end of described geotechnological cloth bag fixes with the bottom of described reinforcing cage respectively, tighten with some roads elastic cord the middle part of described geotechnological cloth bag, described geotechnological cloth bag integral body is hollow cylinder, described geotechnological cloth bag is double-decker at least, goes up lower sealing and have one at least for the inner chamber that holds injection slurry, one end of described Grouting Pipe is connected with described geotechnological cloth bag, the external slip casting of the other end of described Grouting Pipe source.
2. device at the bottom of the expansion according to claim 1, it is characterized in that, the cuff cloth bag is offered on the top of described geotechnological cloth bag, and the top of described cuff cloth bag has the opening for the end insertion of described Grouting Pipe, and the bottom of described cuff cloth bag is communicated with the inner chamber of described geotechnological cloth bag.
3. device at the bottom of the expansion according to claim 2 is characterized in that, the quantity of described cuff cloth bag is two.
4. device at the bottom of the expansion according to claim 2 is characterized in that, an end of described Grouting Pipe arranges a slurry casting machine that has an injected hole.
5. device at the bottom of the expansion according to claim 2 is characterized in that, described cuff cloth bag is arranged at the middle and upper part of described geotechnological cloth bag.
6. device at the bottom of the expansion according to claim 1 is characterized in that, the diameter of described geotechnological cloth bag is than the big 200-300mm of diameter of described reinforcing cage.
7. device at the bottom of the expansion according to claim 1 is characterized in that, described Grouting Pipe is iron pipe.
8. an injection forming expanded bore pile is characterized in that, it forms by being equipped with to build as the reinforcing cage of device at the bottom of any described expansion in the claim 1 ~ 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320070187 CN203129129U (en) | 2013-02-06 | 2013-02-06 | Slip casting expanded bottom pile and bottom-expanding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320070187 CN203129129U (en) | 2013-02-06 | 2013-02-06 | Slip casting expanded bottom pile and bottom-expanding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203129129U true CN203129129U (en) | 2013-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320070187 Withdrawn - After Issue CN203129129U (en) | 2013-02-06 | 2013-02-06 | Slip casting expanded bottom pile and bottom-expanding device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203129129U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114578A (en) * | 2013-02-06 | 2013-05-22 | 上海市建工设计研究院有限公司 | Grouting molding pedestal pile and construction method thereof and pedestal expanding device |
-
2013
- 2013-02-06 CN CN 201320070187 patent/CN203129129U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114578A (en) * | 2013-02-06 | 2013-05-22 | 上海市建工设计研究院有限公司 | Grouting molding pedestal pile and construction method thereof and pedestal expanding device |
| CN103114578B (en) * | 2013-02-06 | 2015-07-01 | 上海市建工设计研究院有限公司 | Grouting molding pedestal pile and construction method thereof and pedestal expanding device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130814 Effective date of abandoning: 20150701 |
|
| RGAV | Abandon patent right to avoid regrant |