CN103758121A - Deep foundation pit built-in profile steel drawable unreinforced filling pile - Google Patents
Deep foundation pit built-in profile steel drawable unreinforced filling pile Download PDFInfo
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- CN103758121A CN103758121A CN201410007380.1A CN201410007380A CN103758121A CN 103758121 A CN103758121 A CN 103758121A CN 201410007380 A CN201410007380 A CN 201410007380A CN 103758121 A CN103758121 A CN 103758121A
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Abstract
The invention relates to a deep foundation pit built-in profile steel drawable unreinforced filling pile which comprises profile steel and plain concrete. The profile steel is located inside the pile. Anti-friction agent is coated on the surface of the profile steel. Kraft paper is adhered outside the anti-friction agent. The plain concrete wraps around the profile steel coated with the anti-friction agent and adhered with the kraft paper. By the deep foundation pit built-in profile steel drawable unreinforced filling pile, steel recycling is achieved, and construction efficiency is increased at the same time.
Description
Technical field
The present invention relates to the castinplace pile in Geotechnical Engineering field, particularly relate to the built-in shaped steel of a kind of deep foundation ditch and can pull out formula without muscle castinplace pile.
Background technology
Along with the develop rapidly of urban construction, the underground space has obtained large-scale exploitation, for Underground Garage auxiliarily, underground power house, underground power hub, the construction of the underground constructions such as subway station, base pit engineering arises at the historic moment, base pit engineering belongs to temporary works, only in the construction stage, work, after being completed, underground construction deactivates, and the fender body of construction in early stage has just been stayed in soil, very waste, in order to make full use of the system of going along with sb. to guard him in base pit engineering and cost-saving, people develop SMW engineering method-stiffness the method for mixing cement and soil into pile, in cement earth pile, insert H shaped steel etc., formation has the enclosure wall of the supporting and protection structure of stressed and impervious two kinds of functions, its built-in shaped steel can be extracted recycling, but it is gone along with sb. to guard him system and is out of shape larger, when having relatively high expectations, foundation ditch surrounding enviroment should not use, compare SMW engineering method, the bending rigidity that bored pile is gone along with sb. to guard him system is large, be out of shape less, be applicable to the higher situation of environmental requirement, but it adopts reinforcing bar as stressed ingredient, the not reproducible utilization of reinforcing bar, can only stay in soil, not only cause waste of material, and affected the continuation utilization of the following underground space, and the making of reinforcing cage is wasted time and energy, efficiency of construction is limited.
Through prior art literature search is found, present stage is for overcoming the above problems, the existing constructor of engineering circles carries out research and the practice that shaped steel combines with castinplace pile, in " inserting afterwards steel reinforced concrete soldier pile construction technology and application thereof " that Wang Peng etc. deliver at < < engineering investigation > > for 2012, press slotting reinforcing cage in filling pile driving construction to change shaped steel into long auger, be applicable to the foundation pile below diameter 400mm, there is working procedure easy, efficiency is high, pile quality easily ensures, the features such as cost is lower, in Foundation Pit Construction, obtained good application, but its shaped steel is retained in soil, the same with the reinforcing cage in traditional castinplace pile, still there is waste of material problem, the scope of application is narrower simultaneously, the only foundation pile below application diameter 400mm.
Summary of the invention
Technical problem to be solved by this invention is to provide the built-in shaped steel of a kind of deep foundation ditch can pull out formula without muscle castinplace pile, can realize the recycling of steel, improves efficiency of construction simultaneously.
The technical solution adopted for the present invention to solve the technical problems is: provide the built-in shaped steel of a kind of deep foundation ditch can pull out formula without muscle castinplace pile, comprise shaped steel and plain concrete, it is inner that described shaped steel is positioned at stake, and described shaped steel external coating has anti-friction agent; Described anti-friction agent posts kraft outward; Described plain concrete is wrapped in and is brushed with anti-friction agent and posts around the shaped steel of kraft.
Described shaped steel bottom is than the high 400～600mm in bottom of stake.
Described shaped steel is H shaped steel.
Described H shaped steel is positioned at a central interior position.
Described shaped steel is T-steel.
Described T-steel is positioned at a tensile region.
Described kraft adopts full mode of pasting to be affixed on anti-friction agent outside.
The protective layer thickness of described shaped steel is not less than 50mm.
Beneficial effect
Owing to having adopted above-mentioned technical scheme, the present invention compared with prior art, there is following advantage and good effect: the present invention replaces with shaped steel by the reinforcing cage in traditional castinplace pile, and by shaped steel external coating anti-friction agent, put up the measures such as kraft and effectively reduce shaped steel and concrete frictional resistance, realize the recycling of built-in shaped steel, make cost obtain effective control.The present invention does not need to make loaded down with trivial details reinforcing cage, and technique is simplified, and efficiency of construction is promoted.Stake bending rigidity is large, and retaining wall distortion is little, is conducive to control peripheral distortion.
Accompanying drawing explanation
Fig. 1 is that built-in H shaped steel can pull out the floor map of formula without muscle castinplace pile;
Fig. 2 is that built-in H shaped steel can pull out the generalized section of formula without muscle castinplace pile;
Fig. 3 is that built-in T-steel can pull out the floor map of formula without muscle castinplace pile;
Fig. 4 is that built-in T-steel can pull out the generalized section of formula without muscle castinplace pile;
Fig. 5 is shaped steel external coating anti-friction agent and the schematic diagram of putting up kraft.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Embodiments of the present invention relate to the built-in shaped steel of a kind of deep foundation ditch can pull out formula without muscle castinplace pile, comprises shaped steel and plain concrete, wherein; stake footpath is 300～2500mm; stake is long is 5～30m, and it is inner that described shaped steel is positioned at stake, and shaped steel protective layer thickness meets the related request of relevant specification.Described shaped steel external coating has anti-friction agent; Described anti-friction agent posts kraft outward; Described plain concrete is wrapped in and is brushed with anti-friction agent and posts around the shaped steel of kraft.
The present invention replaces with shaped steel by the reinforcing cage in traditional castinplace pile, and by shaped steel external coating anti-friction agent, put up the measures such as kraft and effectively reduce shaped steel and concrete frictional resistance, realize the recycling of built-in shaped steel, its shaped steel can reuse, and makes cost obtain effective control.Do not need to make reinforcing cage, efficiency of construction is high; Stake bending rigidity is large, and fender body distortion is little.
Embodiment 1:
Referring to Fig. 1 and Fig. 2, built-in shaped steel can pull out formula and comprise H shaped steel 2, plain concrete 3 two parts without muscle castinplace pile 1.H shaped steel 2 is positioned at the central authorities of stake 1, and plain concrete 3 is wrapped in around H shaped steel 2.Referring to Fig. 5, the surface uniform of H shaped steel 2 is coated with and is brushed with anti-friction agent 4, and kraft 5 posts up anti-friction agent 4 outsides, while putting up, will completely paste, and does not stay gap, further shaped steel 2 and plain concrete 3 are kept apart.
In the present embodiment, built-in shaped steel can pull out formula and be shaped as circle without 1 of muscle castinplace pile, stake footpath 800mm, the long 5m of stake.
H shaped steel 2 protective layer thickness meet the related request of relevant specification, and H shaped steel 2 bottoms are than the stake 1 high 400mm in the end.H shaped steel 2 specifications can be selected according to calculating shearing, moment of flexure.
Referring to Fig. 5, anti-friction agent 4 can select auxiliary shaped steel in conventional SMW engineering method to promote anti-friction agent used, and anti-friction agent 4 will evenly completely be brushed in shaped steel 2 surfaces, to reduce the frictional resistance between shaped steel 2 and plain concrete 3.Kraft 5 posts up anti-friction agent 4 outsides, while putting up, will completely paste, and does not stay gap, further shaped steel 2 and plain concrete 3 are kept apart.
Embodiment 2:
Referring to Fig. 3 and Fig. 4, built-in shaped steel can pull out formula and comprise T-steel 2, plain concrete 3 two parts without muscle castinplace pile 1.T-steel 2 is positioned at stake 1 tensile region, and plain concrete 3 is wrapped in around T-steel 2.Referring to Fig. 5, T-steel 2 external coatings have anti-friction agent 4, and kraft 5 posts up anti-friction agent 4 outsides, while putting up, will completely paste, and does not stay gap, further shaped steel 2 and plain concrete 3 are kept apart.
In the present embodiment, built-in shaped steel can pull out formula and be shaped as circle without muscle grout pile 1, stake footpath 800mm, the long 30m of stake.
T-steel 2 protective layer thickness meet the related request of relevant specification, and T-steel 2 bottoms are than the stake 1 high 600mm in the end.T-steel 2 specifications can be selected according to calculating shearing, moment of flexure.
Referring to Fig. 5, anti-friction agent 4 selects auxiliary shaped steel in conventional SMW engineering method to promote anti-friction agent used, and anti-friction agent 4 will evenly completely be brushed in shaped steel 2 surfaces, to reduce the frictional resistance between shaped steel 2 and plain concrete 3.Kraft 5 posts up anti-friction agent 4 outsides, while putting up, will completely paste, and does not stay gap, further shaped steel 2 and plain concrete 3 are kept apart.
Claims (7)
1. the built-in shaped steel of deep foundation ditch can pull out formula without a muscle castinplace pile, comprises shaped steel (2) and plain concrete (3), it is characterized in that, described shaped steel (2) is positioned at stake (1) inside, and described shaped steel (2) external coating has anti-friction agent (4); The outer kraft (5) that posts of described anti-friction agent (4); Described plain concrete (3) is wrapped in the shaped steel (2) that is brushed with anti-friction agent (4) and posts kraft (5) around.
2. the built-in shaped steel of deep foundation ditch according to claim 1 can pull out formula without muscle castinplace pile, it is characterized in that, described shaped steel (2) bottom is than the high 400～600mm in bottom of stake (1).
3. the built-in shaped steel of deep foundation ditch according to claim 1 can pull out formula without muscle castinplace pile, it is characterized in that, described shaped steel (2) is H shaped steel.
4. the built-in shaped steel of deep foundation ditch according to claim 3 can pull out formula without muscle castinplace pile, it is characterized in that, described H shaped steel is positioned at stake (1) central interior position.
5. the built-in shaped steel of deep foundation ditch according to claim 1 can pull out formula without muscle castinplace pile, it is characterized in that, described shaped steel (2) is T-steel.
6. the built-in shaped steel of deep foundation ditch according to claim 5 can pull out formula without muscle castinplace pile, it is characterized in that, described T-steel is positioned at stake (1) tensile region.
7. the built-in shaped steel of deep foundation ditch according to claim 1 can pull out formula without muscle castinplace pile, it is characterized in that, described kraft (5) adopts full mode of pasting to be affixed on anti-friction agent (4) outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410007380.1A CN103758121A (en) | 2014-01-08 | 2014-01-08 | Deep foundation pit built-in profile steel drawable unreinforced filling pile |
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| CN201410007380.1A CN103758121A (en) | 2014-01-08 | 2014-01-08 | Deep foundation pit built-in profile steel drawable unreinforced filling pile |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234063A (en) * | 2014-09-24 | 2014-12-24 | 沈阳建筑大学 | Structure of steel-reinforced concrete slide-resistant pile |
| CN104631440A (en) * | 2015-01-29 | 2015-05-20 | 南昌市建筑工程集团有限公司 | Stiffening core lengthening foundation pit support structure for existing large-diameter bored concrete pile and construction method |
| CN112095588A (en) * | 2020-09-22 | 2020-12-18 | 上海市基础工程集团有限公司 | Section steel or steel pipe cast-in-situ bored pile and construction method thereof |
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| JP2924355B2 (en) * | 1991-09-20 | 1999-07-26 | 三菱マテリアル株式会社 | Construction method of pile body |
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| CN101864773A (en) * | 2010-04-14 | 2010-10-20 | 江苏江中集团有限公司 | Deep foundation pit support process |
| CN102011402A (en) * | 2010-11-11 | 2011-04-13 | 泛华建设集团有限公司 | Construction method of long auger drilling concrete-grouted back-plugged profile steel piles |
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2014
- 2014-01-08 CN CN201410007380.1A patent/CN103758121A/en active Pending
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| JP2924355B2 (en) * | 1991-09-20 | 1999-07-26 | 三菱マテリアル株式会社 | Construction method of pile body |
| CN2241709Y (en) * | 1995-12-22 | 1996-12-04 | 宣嘉伦 | I-steel for high-rise foundation guard post |
| CN101768961A (en) * | 2010-01-22 | 2010-07-07 | 中铁二十二局集团第六工程有限公司 | Construction method of section-steel triaxial soil-cement mixing pile |
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| CN102011402A (en) * | 2010-11-11 | 2011-04-13 | 泛华建设集团有限公司 | Construction method of long auger drilling concrete-grouted back-plugged profile steel piles |
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| 王鹏等: "后插型钢混凝土支护桩施工技术及其应用", 《工程勘察》 * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234063A (en) * | 2014-09-24 | 2014-12-24 | 沈阳建筑大学 | Structure of steel-reinforced concrete slide-resistant pile |
| CN104631440A (en) * | 2015-01-29 | 2015-05-20 | 南昌市建筑工程集团有限公司 | Stiffening core lengthening foundation pit support structure for existing large-diameter bored concrete pile and construction method |
| CN112095588A (en) * | 2020-09-22 | 2020-12-18 | 上海市基础工程集团有限公司 | Section steel or steel pipe cast-in-situ bored pile and construction method thereof |
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Application publication date: 20140430 |