CN201762704U - Long-auger mixing cast-with-pressure CFG special-shaped composite pile - Google Patents
Long-auger mixing cast-with-pressure CFG special-shaped composite pile Download PDFInfo
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- CN201762704U CN201762704U CN2010202733964U CN201020273396U CN201762704U CN 201762704 U CN201762704 U CN 201762704U CN 2010202733964 U CN2010202733964 U CN 2010202733964U CN 201020273396 U CN201020273396 U CN 201020273396U CN 201762704 U CN201762704 U CN 201762704U
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Abstract
A long-auger mixing cast-with-pressure CFG special-shaped composite pile consists of a CFG special-shaped pile body. A plurality of axial ribs are arranged on the surface of the CFG special-shaped pile body and distributed uniformly along the external circumference, the CFG special-shaped pile body is arranged at the axis center of a cement mixing pile, and a mixing pile permeable layer is coated on the periphery of the cement mixing pile. The long-auger mixing cast-with-pressure CFG special-shaped composite pile has the advantages that the axial ribs arranged on the surface of the CFG special-shaped pile expand area contacting with the cement mixing pile on the periphery, increase side friction resistance greatly and strengthen single-pile bearing capacity. Due to the special section structure of the CFG special-shaped pile, the composite pile is suitable for construction through the method of long-auger drilling and mixing. By the aid of the advantage that long auger drills can drill the hardpan and the advantages of low cost and uniform and controllable mixing of mixing piles, the composite pile can lead construction to be easy and high-efficient, lead construction quality to be controlled easily and reduce cost greatly.
Description
Technical field
This is suitable for the novel pile that belongs in the building foundation construction, and particularly long helical stir is pressed and irritated CFG (cement, flyash, rubble) shaped pile.Be used for rigid pile composite foundation.The back is inserted reinforcing cage and be can be used as the stake of resistance to plucking anti-floating, also can be used for the resistance to compression foundation pile.Especially at big air space ratio soil layer and contain layer of sand or the sand-pebble layer construction is that other method is incomparable.
Background technology
Long spiral center presses filling CFG pile composite foundation fast with its speed of application, without mud off, do not have mud contamination, realized dried operation, be beneficial to safety construction, construction cost is cheap, quality assurance is reliable, and is widely used in various stratum and various base form, thereby is widely used, especially in city construction, more apparent its advantage.
According to relevant document introduction, stir or the churning cement earth pile not obvious with the interface of soil, thereby make its side frictional resistance (side friction resistance) equal 5 times of side frictional resistance of reinforced concrete pile and soil! These characteristics have determined stirring concrete earth pile, churning cement earth pile or rotary jet stirring cement earth pile its side frictional resistance if can be brought into play, and its bearing capacity will improve greatly.The length that reaches the stake of same bearer power just can shorten, and is convenient to construction, can ensure the quality of products and progress, saves cost.
The CFG pile composite foundation press to be irritated when being used for big air space ratio soil layer in long spiral center, because the bearing capacity of soil is low, contribution is just little in the composite foundation design, and the side frictional resistance of stake is little, make that CFG stake bearing capacity of single pile is low, thereby want to reach the bearing capacity of design, just need the very long or very close of design, the advantage that not only makes CFG pile composite foundation cheapness no longer, also can make the CFG pile driving construction difficulty that becomes, Kunming, Yunnan engineering for example, the soil layer air space ratio reaches 2.5, find when adopting the construction of CFG pile composite foundation that the unearthed theoretical value of the long 14m stake of diameter 600mm should be about 4m originally
3, and actual coming outbreak out greater than 8m
3Super concrete placing is serious during guncreting, fullness coefficient greater than 3! Make that not only artificial clear native workload is big, rig displacement difficulty makes that also the concrete waste is serious, has lost the advantage of CFG pile composite foundation.
When running into close sand pebble layer or thick sand bed, just the concrete perfusion difficulty can appear, certain engineering design stake footpath 600mm, the long 20m of stake, layer of sand thick 17～18m in bottom in the long scope of its king-pile, densification, 2～3 piles of can only constructing in one day, efficient is low, and quality can not guarantee.Adopted that more high slump granule concrete is also of no avail, concrete supply the merchant also have strong comments.Construction unit is to such construction speed and also strong dissatisfaction of quality.
Summary of the invention
The purpose of this utility model provides a kind of long helical stir and presses and irritate the special-shaped composite pile of CFG, solving above-mentioned big air space ratio soil layer and layer of sand and sand-pebble layer construction CFG stake difficulty, or the problem of deficiency in economic performance; Simultaneously in order to bring into play the potentiality of the huge side friction of stake that paddling process forms, and can overcome hard formation and reach projected depth.
The technical solution of the utility model is: be made of the special-shaped pile body of CFG, be provided with several axial fins on the surface of the special-shaped pile body of this CFG.
Described fin is uniform along outer peripheral face.
Described fin is four and uniform along outer peripheral face, constitutes star section.
The special-shaped pile body of this CFG is located at the axle center of cement mixing method.
Be coated with the agitation pile permeable formation in the periphery of this cement mixing method.
Go into reinforcing cage in the special-shaped pile body interpolation of described CFG.
The beneficial effects of the utility model are: there are several axial fins on the surface of this CFG shaped pile, enlarged contact area with peripheral cement mixing method, improved the side friction resistance greatly, its bearing capacity of single pile is improved greatly, Bearing Capacity of Composite Foundation is detailed to be improved thereby make; Or the quantity that lays out pile under the Bearing Capacity of Composite Foundation same case significantly reduces the saving cost.And because the special cross-section structure of CFG shaped pile, be particularly suitable for adopting long spiral and stirring composite methods to construct, promptly adopt long helical stir respectively to construct into cement earth pile twice up and down by the speed of design, adopt the ground pump to carry out pumping CFG concrete then, owing to carry to concrete provides passage on the cross stirrer gear of long helical stir drilling tool, so propose the CFG stake that has formed the profiled-cross-section identical in the process with the stirrer gear shape last.Like this, can utilize the long screw auger tool to overcome the advantage of hardpan, in conjunction with the agitation pile cheapness and the controlled advantage that stirs, construction CFG stake just has superiority, and makes construction become easily efficiently, and quality is easy to control, and cost reduces greatly.
Description of drawings
Fig. 1 is a side structure schematic diagram of the present utility model;
Fig. 2 is the A-A sectional view of Fig. 1.
The specific embodiment
Referring to Fig. 1 and Fig. 2, the long helical stir of the utility model presses this embodiment that irritates the special-shaped composite pile of CFG to be made of the special-shaped pile body 3 of CFG, be provided with on the surface of the special-shaped pile body 3 of this CFG four axial along the uniform fin of outer peripheral face, four special-shaped pile bodies 3 of CFG that fins constitute star sections.
Periphery at the special-shaped pile body 3 of this CFG is coated with cement mixing method 2, and the special-shaped pile body 3 of this CFG is located at the axle center of cement mixing method, and the two is combined into cylindrical pile body.
Be coated with agitation pile permeable formation 1 in the periphery of this cement mixing method 2, adopting long helical stir to form in the process of cement earth pile, cement in the cement-soil be penetrated into cement mixing method 2 around form agitation pile permeable formation 1, thereby formed the composite pile of forming by the special-shaped pile body 3 of CFG, cement mixing method 2 and agitation pile permeable formation 1.
Cement in the special-shaped pile body 3 of described CFG can adopt Portland cement, portland slag cement or pulverized fuel ash cement etc.; Flyash has the low strength cement effect, improves the pumpability of slurry simultaneously; The accelerating admixture effect is to promote the cement paste rapid solidification, and improves its early strength.Add early strength admixture in case of necessity,, shorten time of setting to improve its early strength.The ratio of above-mentioned various materials is a routine techniques, and improving general test can obtain.
After the special-shaped pile body 3 of above-mentioned CFG, cement mixing method 2 insert reinforcing cage, can be applied to the stake of resistance to plucking anti-floating, also can be used for compressive pile and slope protection pile, and can be widely used in the stratum that conventional methods such as closely knit layer of sand and sandy gravel can not be suitable for.Solved the difficult problem of concrete perfusion difficulty in the long spiral pore-forming pipe, comprised for stratum, big space, construction is become easily, speed of application improves greatly, and quality reaches assurance; Simultaneously improved bearing capacity greatly, cost descends greatly.Shown its great superiority.
Claims (6)
1. one kind long helical stir is pressed and is irritated the special-shaped composite pile of CFG, it is characterized in that: be made of the special-shaped pile body of CFG, be provided with several axial fins on the surface of the special-shaped pile body of this CFG.
2. long helical stir according to claim 1 is pressed and is irritated the special-shaped composite pile of CFG, and it is characterized in that: described fin is uniform along outer peripheral face.
3. long helical stir according to claim 1 is pressed and is irritated the special-shaped composite pile of CFG, and it is characterized in that: described fin is four and uniform along outer peripheral face, constitutes star section.
4. long helical stir according to claim 1 is pressed and irritated the special-shaped composite pile of CFG, it is characterized in that: the special-shaped pile body of this CFG is located at the axle center of cement mixing method.
5. long helical stir according to claim 4 is pressed and is irritated the special-shaped composite pile of CFG, it is characterized in that: be coated with the agitation pile permeable formation in the periphery of this cement mixing method.
6. long helical stir according to claim 1 is pressed and is irritated the special-shaped composite pile of CFG, it is characterized in that: go into reinforcing cage in the special-shaped pile body interpolation of described CFG.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202733964U CN201762704U (en) | 2010-07-28 | 2010-07-28 | Long-auger mixing cast-with-pressure CFG special-shaped composite pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202733964U CN201762704U (en) | 2010-07-28 | 2010-07-28 | Long-auger mixing cast-with-pressure CFG special-shaped composite pile |
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| Publication Number | Publication Date |
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| CN201762704U true CN201762704U (en) | 2011-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202733964U Expired - Lifetime CN201762704U (en) | 2010-07-28 | 2010-07-28 | Long-auger mixing cast-with-pressure CFG special-shaped composite pile |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619218A (en) * | 2012-04-19 | 2012-08-01 | 中铁第四勘察设计院集团有限公司 | Back-insert steel reinforcement cage cement-flyash-gravel pile and pile-forming method thereof |
| CN103015430A (en) * | 2012-12-04 | 2013-04-03 | 北京建材地质工程公司 | Long auger pressure filling steel reinforced cement-soil pile foundation pit water-resisting and supporting method |
| CN103061328A (en) * | 2013-01-29 | 2013-04-24 | 方泰建设集团有限公司 | Post-grouting gravel pile with sand wall wing plates and construction method |
-
2010
- 2010-07-28 CN CN2010202733964U patent/CN201762704U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619218A (en) * | 2012-04-19 | 2012-08-01 | 中铁第四勘察设计院集团有限公司 | Back-insert steel reinforcement cage cement-flyash-gravel pile and pile-forming method thereof |
| CN102619218B (en) * | 2012-04-19 | 2015-09-30 | 中铁第四勘察设计院集团有限公司 | Rear slotting reinforcing cage CFG and piling method thereof |
| CN103015430A (en) * | 2012-12-04 | 2013-04-03 | 北京建材地质工程公司 | Long auger pressure filling steel reinforced cement-soil pile foundation pit water-resisting and supporting method |
| CN103061328A (en) * | 2013-01-29 | 2013-04-24 | 方泰建设集团有限公司 | Post-grouting gravel pile with sand wall wing plates and construction method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110316 |
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| CX01 | Expiry of patent term |