CN103967004A - Supporting and protecting composite anti-slide pile suitable for high-attitude and high-intensity regions - Google Patents
Supporting and protecting composite anti-slide pile suitable for high-attitude and high-intensity regions Download PDFInfo
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- CN103967004A CN103967004A CN201410146872.9A CN201410146872A CN103967004A CN 103967004 A CN103967004 A CN 103967004A CN 201410146872 A CN201410146872 A CN 201410146872A CN 103967004 A CN103967004 A CN 103967004A
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Abstract
A supporting and protecting composite anti-slide pile suitable for high-attitude and high-intensity regions is composed of a pile core and a pile cylinder, wherein the pile cylinder is tightly pasted on the outer side of the pile core. The pile core is composed of a prefabricated prestressed pile, grouting pipes and a center grouting pipe, wherein the cross section of the prefabricated prestressed pile is orthohexagonal. Each side face of the prefabricated prestressed pile is provided with a groove in the axis direction. The grouting pipes are arranged in the grooves. A center grouting hole is formed in the prefabricated prestressed pile in the central axis direction. The center grouting pipe is arranged in the center grouting hole. The pile cylinder is composed of multiple layers of reinforcing steel bar cages and a grouting body. The reinforcing steel bar cage on the innermost layer tightly wraps the pile core, the reinforcing steel bar cage on the outermost layer is tightly attached to the hole wall, and the rest layers of reinforcing steel bar cages are evenly distributed. The reinforcing steel bar cages are wrapped in the grouting body. The concrete strength of the pile core reaches more than 80 MPa, and therefore the defects that the cast-in-place concrete hardening speed is low at a low temperature, and the quality is difficult to ensure are overcome; the tension resistance of the pile is greatly improved due to the prestress of the pile core and the reinforcing steel bar cages of the pile cylinder, and therefore the horizontal bearing capacity is improved, and larger anti-slide force can be provided by the supporting and protecting composite anti-slide pile.
Description
Technical field
The invention belongs to technical field of civil engineering, relate to a kind of compound antislide pile of the high slope supporting that is applicable to high height above sea level, high earthquake intensity area.
Background technology
For the economic development of accelerating Tibetan area exchanges fusion with national, the expressway construction that enters into Tibet is very urgent and necessary.The juncture area of Southwestern China and Tibetan area, is located in Qinghai-Tibet east side, and landforms are taking high mountain gorge as feature, slope Gao Gushen, and landform is steep; Rarefaction of air, ecological environment frailty, and there is the impact of seasonal frozen ground; And active fault is many, earthquake take place frequently and earthquake magnitude high, earthquake intensity is large, as Diexi Earthquake (1933) and Wenchuan earthquake (2008).Therefore, its landform, geological conditions, weather and ecological condition are extremely complicated, severe.
In the time that highway is built, soil excavation is unavoidable, and this causes disturbance to existing ecological environment, stratum, if do not taked special road building technology and ecological restoring method, just cannot ensure that ecological environment exempts from destruction.Therefore, in the high-grade highway construction process of carrying out in this area, avoid occurring excavation although adopt various measures, still there will be high steep cut slope unavoidablely, also inevitably have limit, tunnel, face upward the stability problem on slope.The excavation of high slope has changed the balance of original geological environment, is the condition of having created of the geological disaster such as avalanche, landslide.
Generally, Anti-sliding Pile is cast-in-place concrete pile.In side slope, Concrete Grouting Pale is easy, but quality is unstable, easily occurs defect; Anti-bending strength is poor, and its level is lower to supporting capacity.Therefore, when design, generally strengthen the diameter of cast-in-place antislide pile, cause waste of material.However, still can not ensure its performance completely.
But, adopt preformed pile can overcome the above-mentioned shortcoming of castinplace pile.Because preformed pile is made at factory's streamline, steady quality; Applied high pre-stress, anti-bending strength increases substantially.But because side slope landform tilts, and understratum mostly is hardpan or rock, is difficult to static pressure or is driven into method construction.Therefore, design one can be ensured the quality of products stable, and it is necessary holding again easy working antislide pile.
Therefore,, under so complicated and severe condition, the safe operation of the stable and speedway of side slope made limit that novel ruggedized construction could be maximum and ensures by material that must selectivity excellence.
Summary of the invention
The object of the present invention is to provide that a kind of reliability is high, constructability, and be applicable to the compound antislide pile of high height above sea level, high earthquake intensity area high slope.
The compound antislide pile of high slope supporting that is applicable to high height above sea level and high earthquake intensity area, is made up of two parts: stake core and stake cylinder.Stake core is positioned in the middle of stake cylinder, and both combine closely.Stake core comprises that cross section is orthohexagonal precast prestressed stake, periphery Grouting Pipe, center Grouting Pipe; On each side of precast prestressed stake, have groove along axis direction, periphery Grouting Pipe is placed in groove, and precast prestressed stake has center injected hole along central axis, in the Grouting Pipe centering injected hole of center; Stake cylinder is made up of multistory reinforced cage and injecting cement paste; Innermost layer reinforcing cage closely wraps up with stake core, and outermost layer reinforcing cage is close to hole wall, and all the other each layer is uniformly distributed; Multistory reinforced cage is wrapped up by injecting cement paste, and stake core and reinforcing cage are bonded as entirety by injecting cement paste.
Described reinforcing cage by toughness reach D level and more than, the reinforcement fabrication that plastic elongation reaches more than 9% forms.
More than the intensity of the precast prestressed stake of described stake core reaches 80MPa.
In stake core, the cross section of precast prestressed stake is regular hexagon, on each, has a groove along axis direction, and diameter is 80～110mm, suitable with conventional Grouting Pipe diameter; Along reserved groove, Grouting Pipe is installed on precast prestressed stake surface, and in the time of fabrication of reinforcing cage, installs the Yi Gen center Grouting Pipe straight-through stake end along precast prestressed stake axis.
In stake cylinder, be wrapped in the multi-layer annular wire basket in core outside or reinforcing cage and be stake accurate positioning when ensureing to construct, the spacing of each interlayer and arrangement of reinforcement can be actual definite according to engineering.Grouting Pipe by stake core is carried out slip casting, and stake core and multi-layer annular reinforcing cage are bonded as to entirety, forms compound antislide pile.
All sizes above-mentioned and structure all can change with engineering actual conditions.
Beneficial effect
In the compound antislide pile of the present invention, more than the concrete strength of stake core reaches 80MPa, overcome that cast-in-situ concrete sclerosis under low temperature is slow, the shortcoming of difficult quality guarantee; The prestressing force of stake core has increased considerably the tension ability of stake, and then has improved level to supporting capacity, and larger anti-skid power can be provided.Multi-layer annular gauze wire cloth or the steel mesh reinforcement of stake cylinder, ensured that stake core is positioned at the center of compound antislide pile, improved the tensile property of stake cylinder, strengthened the plasticity of injecting cement paste.Stake core is hexagon, and Grouting Pipe is installed above, and this ensures that it is good with stake cylinder adhesive property, forms compound antislide pile jointly.
Brief description of the drawings
Fig. 1 is drawing in side sectional elevation of the present invention;
Fig. 2 is that the present invention is along cross section 1-1 cut-away view.
In figure, 1, stake core, 2, stake cylinder, 3, the precast prestressed stake of hexagon, 4, stake cylinder reinforcing cage, 5, periphery Grouting Pipe, 6, center Grouting Pipe, 7, hole wall, 8, injecting cement paste.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
This embodiment for installing compound antislide pile in high slope.Base area matter orographic condition etc., the intended diameter of compound antislide pile is 1500mm, its king-pile core circumscribed circle diameter is 800mm.
(1) make stake core.According to stake bore dia and geology orographic condition etc., the length of side of the precast prestressed stake of regular hexagon of design stake core is 800m, and each is uniformly distributed a groove along axis.Groove is semicircle, and its diameter is 80～110mm, Grouting Pipe diameter 110mm.
Precast prestressed stake adopts centrifugal molding process and autoclave to make.Selecting high-strength concrete and toughness is the reinforcing bar of D level, adds appropriate air entraining agent.Thereby, ensure that stake core can still have good mechanical characteristic and durability in high height above sea level, high earthquake intensity area.
(2) reinforcing cage of colligation stake cylinder.Between the hole wall of stake cylinder and stake core, be designed to 5 layers of reinforcing cage, between each layer, fix with the reinforcing bar of diameter 7mm.Innermost layer reinforcing cage closely wraps up with stake core, and outermost layer reinforcing cage is close to hole wall, and all the other each layer is uniformly distributed.
(3) boring.According to design drawing, in the place's boring of design stake position, diameter is 1500mm.
(4) pile extension.When stake hole depth is greater than stake when long, can adopt the mode such as welding and stake core end mounting flange, tie.
(5) slip casting in hole, forms compound antislide pile.By colligation the stake core of stake cylinder reinforcing cage put into behind hole, in stake hole, carry out slip casting by Grouting Pipe and center Grouting Pipe, its grouting amount and grouting pressure will reach designing requirement.
In injecting paste material, add appropriate air entraining agent and early strength admixture, ensure the intensity of injecting cement paste, improve its durability.When slip casting, in stake hole, place installs seal nipple, ensures grouting pressure.
Claims (5)
1. the compound antislide pile of supporting that is applicable to high height above sea level and high earthquake intensity area, is characterized in that: be made up of stake core and stake cylinder two parts, stake cylinder closely sticks on a core outside.
2. a kind of compound antislide pile of supporting that is applicable to high height above sea level and high earthquake intensity area according to claim 1, is characterized in that: described stake core is that orthohexagonal precast prestressed stake, periphery Grouting Pipe, center Grouting Pipe form by cross section; On each side of precast prestressed stake, have groove along axis direction, Grouting Pipe is placed in groove, and precast prestressed stake has center injected hole along central axis, in the Grouting Pipe centering injected hole of center.
3. a kind of compound antislide pile of supporting that is applicable to high height above sea level and high earthquake intensity area according to claim 2, is characterized in that: more than the intensity of described precast prestressed stake reaches 80MPa.
4. a kind of compound antislide pile of supporting that is applicable to high height above sea level and high earthquake intensity area according to claim 1, is characterized in that: described stake cylinder is made up of multistory reinforced cage and injecting cement paste; Innermost layer reinforcing cage closely wraps up with stake core, and outermost layer reinforcing cage is close to hole wall, and all the other each layer is uniformly distributed; Multistory reinforced cage is wrapped up by injecting cement paste.
5. a kind of compound antislide pile of supporting that is applicable to high height above sea level and high earthquake intensity area according to claim 4, is characterized in that: described reinforcing cage is multi-layer annular, by toughness reach D level and more than, the reinforcement fabrication that plastic elongation reaches more than 9% forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410146872.9A CN103967004A (en) | 2014-04-13 | 2014-04-13 | Supporting and protecting composite anti-slide pile suitable for high-attitude and high-intensity regions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410146872.9A CN103967004A (en) | 2014-04-13 | 2014-04-13 | Supporting and protecting composite anti-slide pile suitable for high-attitude and high-intensity regions |
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| Publication Number | Publication Date |
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| CN103967004A true CN103967004A (en) | 2014-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410146872.9A Pending CN103967004A (en) | 2014-04-13 | 2014-04-13 | Supporting and protecting composite anti-slide pile suitable for high-attitude and high-intensity regions |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105002906A (en) * | 2015-07-28 | 2015-10-28 | 济南轨道交通集团有限公司 | Binding type anchor cable composite pile structure serving as main body structure stand column and construction method thereof |
| CN108643200A (en) * | 2018-03-28 | 2018-10-12 | 衢州学院 | Protective device for unsaturation red clay side slope |
| CN109235465A (en) * | 2018-09-20 | 2019-01-18 | 中铁二院工程集团有限责任公司 | Squeeze into the superpower concrete tubular pile breast wall type packaged combination anti-slide pile structure of prestressing force |
| CN112962584A (en) * | 2021-02-08 | 2021-06-15 | 河海大学 | Expandable anti-slide pile and construction method thereof |
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| JPH06280260A (en) * | 1991-08-01 | 1994-10-04 | Takenaka Doboku Co Ltd | Construction method of high strength cast-in-place concrete pile, etc. |
| CN1490467A (en) * | 2003-08-05 | 2004-04-21 | 胡柏英 | Composite friction pile structure and constructing method thereof |
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| CN101798810A (en) * | 2009-02-20 | 2010-08-11 | 上海强劲基础工程有限公司 | Cement-soil composite pile inserted into reinforced concrete core materials |
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| CN202202326U (en) * | 2011-08-31 | 2012-04-25 | 中国建筑第二工程局有限公司 | High-strength concrete precast pipe pile splicing structure |
| CN103541355A (en) * | 2013-10-12 | 2014-01-29 | 福州第七建筑工程有限公司 | High-shear-resistance pipe pile construction method |
| CN203924050U (en) * | 2014-04-13 | 2014-11-05 | 北京工业大学 | A kind of compound antislide pile of supporting that is applicable to high height above sea level and high earthquake intensity area |
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Patent Citations (9)
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| JPH06280260A (en) * | 1991-08-01 | 1994-10-04 | Takenaka Doboku Co Ltd | Construction method of high strength cast-in-place concrete pile, etc. |
| CN1490467A (en) * | 2003-08-05 | 2004-04-21 | 胡柏英 | Composite friction pile structure and constructing method thereof |
| JP4273991B2 (en) * | 2004-02-17 | 2009-06-03 | 東京電力株式会社 | Construction method of composite pile foundation |
| CN1793524A (en) * | 2005-12-27 | 2006-06-28 | 雷玉华 | Method for construction of large head expanding combined pile |
| CN101798810A (en) * | 2009-02-20 | 2010-08-11 | 上海强劲基础工程有限公司 | Cement-soil composite pile inserted into reinforced concrete core materials |
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| CN103541355A (en) * | 2013-10-12 | 2014-01-29 | 福州第七建筑工程有限公司 | High-shear-resistance pipe pile construction method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105002906A (en) * | 2015-07-28 | 2015-10-28 | 济南轨道交通集团有限公司 | Binding type anchor cable composite pile structure serving as main body structure stand column and construction method thereof |
| CN108643200A (en) * | 2018-03-28 | 2018-10-12 | 衢州学院 | Protective device for unsaturation red clay side slope |
| CN109235465A (en) * | 2018-09-20 | 2019-01-18 | 中铁二院工程集团有限责任公司 | Squeeze into the superpower concrete tubular pile breast wall type packaged combination anti-slide pile structure of prestressing force |
| CN112962584A (en) * | 2021-02-08 | 2021-06-15 | 河海大学 | Expandable anti-slide pile and construction method thereof |
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Application publication date: 20140806 |