CN102418339A - Novel energy-saving anti-floating pile - Google Patents
Novel energy-saving anti-floating pile Download PDFInfo
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- CN102418339A CN102418339A CN2011103007085A CN201110300708A CN102418339A CN 102418339 A CN102418339 A CN 102418339A CN 2011103007085 A CN2011103007085 A CN 2011103007085A CN 201110300708 A CN201110300708 A CN 201110300708A CN 102418339 A CN102418339 A CN 102418339A
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Abstract
The invention provides a novel energy-saving anti-floating pile, which comprises a cement pile body. An anti-pulling rib body, a pile tip, anchoring plates and a protective tube are embedded in the pile body, and are connected together; the anti-pulling rib body is connected with a base plate of a structure, and transmits the anti-floating force provided by the anti-floating pile to the base plate of the structure to realize the anti-floating of an underground building. Large anti-floating force can be acquired through large friction force between a large-diameter rotary-jet mixing pile body and foundation soil. The protective tube is adopted to protect the anti-pulling rib body, and the durability of the anti-pulling rib body is greatly improved; and the anti-pulling rib body is made of a high-strength material, so steel can be saved. In addition, the anti-floating rib material is connected with a plurality of anchoring plates, and the binding power between the anti-floating rib material and the rotary-jet mixing pile body is greatly increased, so that several problems of the conventional anti-floating pile are effectively solved, the construction period is effectively shortened, and the engineering cost is reduced.
Description
Technical field
The present invention relates to technical field of civil engineering, particularly foundation and the stake of underground structure anti-floating, the anti-floating stake of high-rise buildings.
Background technology
Along with the high speed development of urban construction, traffic engineering, the development and utilization of underground space development has become trend.Thereupon, particularly outstanding to underground effect on structure by the buoyancy that underground water produces, when underground structure buried depth is big more, the buoyancy that is then produced by underground water is then high more.Groundwater pressure mainly shows the effect of underground structure: the basement bottom board protuberance, and basement leaks up to coal seam floor failure; Inhomogeneous the floating of underground structure integral body can cause the inclination of beam column node place cracking, bottom slab crack and building etc.In order to satisfy the needs of this basic stress balance; The general at present forms such as anti-floating stake technology or increase building counterweight that adopt solve; The use of anti-floating stake in underground structrue engineering wherein is more general, and a kind of as in the pile foundation of anti-floating stake more and more paid attention to by engineering circle at present.Anti-floating power through the anti-floating stake produces is offset the buoyancy that underground water produces underground structure.The anti-floating stake has emerged multiple anti-floating pile body form of structure through the development of decades, from the uniform section bored pile to the stake of prestressing force anti-floating with reducing anti-floating stake or the like.
Requirement to the anti-floating stake mainly concentrates on following 2 points:
(1) the anti-floating power that how to improve the anti-floating stake with reduce construction costs?
Does (2) how the endurance issues of anti-floating pile body solve?
Traditional reinforced concrete pile (comprising bored pile and preformed pile (side's stake and pile tube)); Be the pressure bearing pile type, compressive strength is high, can play good resistance to compression effect; But when using reinforced concrete pile as the anti-floating stake, many weak points of reinforced concrete pile have then been exposed.At first, concrete tensile strength is more much lower than its compressive strength, and tensile strength is merely 1/18 to 1/9 of compressive strength.Pile concrete can produce the crack under stretching action, along with the progressively expansion in crack, concrete is deactivated, and all pulling force is mainly born by reinforcing bar.Because it is underground that the anti-floating stake is in, crack on concrete will inevitably cause that reinforcing bar receives the erosion of water and chemical hazardous substances, thereby has influenced the durability of anti-floating stake; If the width in control crack then need significantly improve its reinforcement ratio, must cause the significantly raising of construction costs; They are two years old; The anti-floating power of anti-floating stake is to provide through the frictional force of pile body with the stake side soil body; Though the reinforced concrete pile pile body has higher-strength; But pile side friction does not improve because of the raising of pile strength, and especially in soft clay area, the pile side friction of reinforced concrete pile is owing to exist slurry coat method then lower.That is to say that steel concrete pile body intensity can not be given full play to, and has caused strength of materials waste, construction costs is improved.
For pile for prestressed pipe and side's stake,, withdrawed from the application of anti-floating stake gradually owing to distress in concrete can be produced in the endurance issues of presstressed reinforcing steel and the work progress though construction costs is lower.
For soil anchor or anchor cable, have the low advantage of construction costs, but, also have the imperfection of construction technology because the crack of grouting body is unreliable to the durability protection of resistance to plucking muscle body, cause in anti-floating stake field, being difficult to promoting.
Based on the present existing problem of anti-floating stake commonly used, engineering circle is badly in need of researching and developing a kind of novel anti-floating stake, and enough anti-floating power can be provided, can solve again the pile body durability and application life problem.
Solve the endurance issues of resistance to plucking muscle body (reinforcing bar or steel strand), must make their the corrosion situation in working environment clear.To this end, we searched the Japan Association of Steel Pipe Piles publication "Steel Hang - Other Design と construction," a book from the book lists a large number of steel pipe piles in the soil corrosion survey results, the following quote data from Japan Ministry of Construction Civil Engineering Institute survey findings:
The respondent is the steel pipe pile of good fortune paddy bridge, and concrete condition is following:
Steel pipe pile external diameter 486mm, wall thickness 16mm, 9mm.
10～November in 1958, construction was extracted after 17 years, carried out the corrosion investigation, and investigation result is as shown in table 1.Visible from table:
(1) the broken parts corrosion of filming in the atmosphere is remarkable; Part corrosion in the topsoil; Local corrosion is arranged except that comprehensive corrosion in the fine sand layer, and local corrosion is more in the mud burning into sand layer; Below clay folder mud, almost there is not corrosion;
(2) the corrosion rate overall average is 0.007mm/ in soil;
(3) position, corrosion rate top layer is obviously greater than the deep layer position; The top layer that coexists, the mud burning into sand is greater than fine sand;
(4) the average 0.024mm/ only in the maximum position of corrosion rate, but the wall thickness corrosion resistant of 2mm 80 years.
Japan's soil property engineering can also be investigated the corrosion situation of steel in soil layer, and the piling bar under the various soil conditions is carried out corrosion test, from 1962 to 1966, is provided with 126 piling bars in 10 places of Japan, and the section of stake is the L type, and stake is about 15m.Then respectively 1 year after setting, respectively extracted 42 in the 5th year, the 10th year, carry out that corrosion situation is observed and the mensuration of thickness of slab reduction, its investigation result is as shown in table 2.
Can make as judging from the investigation result of table 2:
(1) except that matrix section closely, almost maintains the original state through the stake surfaces in 10 years;
(2) various places 10 years overall average corrosion rate (two sides) is 0.0106mm/, and single face is 0.0053mm/, and maximum value is 0.0297mm/;
(3) corrosion rate reduces with year number increase;
(4) recommend design to use corrosion rate to be 0.02mm/.
The steel pipe pile corrosion result of table 1 diverse location
Steel pipe pile corrosion result in the Different Strata of table 2 different regions
In the various decrees in Japanese architecture, building, bay, field such as transform mountains, harness the river, indication, standard, corrosion quantitative limitation and anti-corrosion method all there are concrete regulation, as far as building, in brief:
(1) carries out corrosion test, adopt a year corrosion rate to multiply by 80 years or durable years;
(2) do not test, directly adopt the corrosion amount deposit of 2mm can satisfy life requirement.
Based on above he result of investigation, if consider the corrosion storage level of 3mm can satisfy the life requirement of using more than 100 years for the protection tube of the resistance to plucking muscle body of anti-floating stake.
A kind of novel anti-floating stake will be from the anti-floating power that improves pile body, the durability of reinforcement body; Practice thrift engineering material and set out with aspects such as reducing construction costs, become cement soil pile through rotary jet stirring, this large diameter cement soil pile increases the contact surface with foundation soil; Improved pile side friction; Be furnished with resistance to plucking muscle body in the pile body simultaneously, and link to each other with the stake point, the adhesion stress between resistance to plucking muscle body and the cement soil pile is significantly improved with anchor ingot plate.Utilize the steel pipe of certain wall thickness that resistance to plucking muscle body is protected, do not rely on the protection of cement earth pile, can satisfy the life requirement of muscle body in the anti-floating stake reliably the reinforcement body.Resistance to plucking muscle body is selected for use the high material of tensile strength such as steel strand, reinforcing bar etc. more than three grades, can save steel using amount.Center of effort's point of this pile body is transferred to the bottom of pile body through stake point and anchor ingot plate in addition, transfers the stressed of anti-floating stake pile body to pressured state by tension state, has improved the intensity of cement soil pile.
Summary of the invention
Technical problem to be solved by this invention is; Overcome technical problem and fault of construction that existing anti-floating stake exists; A kind of anti-floating pilework of high anti-floating power is provided, and its anchoring piece (being made up of stake point, reinforcement body, anchor ingot plate etc.) is bigger with the pile body bond area, and anti-floating power, the rotary jet stirring cement soil pile that can effectively improve pile body have bigger diameter; Bigger with the contact surface of the soil body, can obtain higher frictional resistance; The steel protection tube is enclosed within resistance to plucking muscle body in the thick steel pipe of 3mm, and protective action is provided, and guarantees that the reinforcement body can not produce corrosion in 100 years, improved its durability.Ripe, simple, the anti-floating pile body of the anti-floating pile body construction technology of inventing not influenced by the crack, can significantly reduce construction costs.
In order to solve the existing problem of present anti-floating stake, technical scheme of the present invention is such:
The stake of a kind of novel energy-conserving anti-floating comprises a pile body, and resistance to plucking muscle body is arranged in the pile body, it is characterized in that, resistance to plucking muscle body is with the anticorrosion metal tube.
Further, be connected with the parts that at least one increases frictional resistance on the resistance to plucking muscle body.
Further, the parts of increase frictional resistance are anchor ingot plate.
Further, the parts that increase frictional resistance are the stake point, and the stake point is connected to the front end of resistance to plucking muscle body.
Further, be connected with the anchor ingot plate of at least one on the resistance to plucking muscle body, resistance to plucking muscle body front end connects the stake point simultaneously.
Further, described resistance to plucking muscle body, stake point, anchor ingot plate and anticorrosion metal tube and material of body of a pile bond together.
Further, the anticorrosion metal tube is the metal tube with corrosion resistance, and thickness of steel pipe is more than or equal to 0.5mm.
Further, the anchor ingot plate that connects on the described resistance to plucking muscle body is processed by metal or high-strength nonmetals.
Further, described anchor ingot plate is disc, and diameter is 50～500mm, thickness 5～100mm.
Further, described anchor ingot plate is polygon, the length of side 50～500mm, thickness 5～100mm.
Further, described anchor ingot plate is irregularly shaped, thickness 5～100mm.
Further, the pile body of anti-floating stake is the cement soil pile of churning formation, the cement soil pile that stirs formation, the cement soil pile that rotary jet stirring forms, the pile body of cement paste perfusion formation or the pile body that concrete spouting forms.
Further, said resistance to plucking muscle body is non-bending steel cable, bonding steel strand, part the wherein a kind of of steel strand, wire rope, reinforcing bar, steel pipe, section bar that bond.
Further, resistance to plucking muscle body is made up of 1 above thread like material, and anchor ingot plate links to each other with resistance to plucking muscle body.
Further, the pile body external diameter of anti-floating stake is 80mm-1500mm.
Further, the pile body of anti-floating stake diameter along its length is identical.
Further, the pile body of anti-floating stake diameter along its length is different.
Further, the stake point is cylindrical body, is processed by metal material or nonmetals.
Further, extend in the structure base plate at the top of anti-floating stake resistance to plucking muscle body and anticorrosion metal tube, the protecting tube top is provided with a backing plate, and backing plate top is provided with the ground tackle of a pinning resistance to plucking muscle, and resistance to plucking muscle upper end connects special mould clamp.
Further, anchor ingot plate and reinforcement body adopt that extruded sleeve is connected, welding or bolt connect.
The high-strength reinforcement body that has one or more anchor ingot plates will be bonded into one with the cement soil body or cement slurry.Its insertion process is that the reinforcement body is brought in the rotary jet stirring cement soil pile.Anti-floating stake that forms like this and existing all kinds of anti-floating stakes are more as shown in table 3.
Through relatively finding out, anti-floating stake of the present invention not only has higher anti-floating power but also has long durability.Can reach simultaneously the purpose that reduces rolled steel dosage, reduction of erection time, reduction construction costs.
The comparison of table 3 anti-floating stake of the present invention and existing all kinds of anti-floating stakes
Description of drawings
Specify the present invention below in conjunction with the accompanying drawing and the specific embodiment;
Fig. 1 is a kind of novel energy-conserving anti-floating pilework sketch map of the present invention.
Fig. 2 is the structural representation of a kind of novel energy-conserving anti-floating pilework king-pile point of the present invention
Fig. 3 is the structural representation that the anti-floating muscle is connected with base plate in a kind of novel energy-conserving anti-floating pilework of the present invention
The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect and be easy to understand and understand, below in conjunction with concrete diagram, further set forth the present invention.
Referring to Fig. 1; The pile body structure of this novel anti-floating stake does; Comprise a cement soil pile 3, bury resistance to plucking muscle body 4 in the pile body underground and link together that resistance to plucking muscle body 4 links to each other with structure base plate 6 with stake point 1, anchor ingot plate 2 and protecting tube 5; The anti-floating power that the anti-floating stake is provided is delivered on the structure base plate, realizes the anti-floating of underground structure.
Referring to Fig. 2; This novel anti-floating pile body structure is to comprise a rotary jet stirring pile body or by the pile body 3 that cementation forms, bury resistance to plucking muscle body 4 in the pile body 3 underground; Resistance to plucking muscle body 4 and stake point 1 link to each other with a plurality of anchor ingot plates 2, and resistance to plucking muscle body 4 is enclosed within one and protects in the steel pipe 5.
After increasing protection steel pipe 5, steel pipe 5 forms a shielding construction, and when corrosion takes place, then preferential corrosion protection steel pipe 5, protection steel pipe 5 thickness are confirmed by the engineering actual conditions, like age of project, bad border of corrosion etc.Effectively protected inner resistance to plucking muscle body 4 not to be corroded.
Referring to Fig. 3; Resistance to plucking muscle body 4 in this novel anti-floating pile body extend in the structure base plate 6 with protecting tube 5; Use ground tackle 7 and backing plate 10; Realize the sealing of protecting tube 5 in structure base plate 6 and the preparatory stretch-draw of resistance to plucking muscle body 4, and ground tackle 7 reinforcement body 4 is outward linked to each other with reinforcing bar 9 usefulness special mould clamps 8 in the structure base plate.
After forming this pile body 3,, adopt specialist tools, be sent in the pile body along the center of this pile body and go resistance to plucking muscle body 4 and anchor ingot plate 2, protecting tube 5, insert put in place after, and rotary jet grouting in pile body again.
Resistance to plucking muscle body 4 is one or more steel strand, reinforcing bar, wire rope etc.
Anti-floating pilework in the present embodiment is that substep is executed and do to be accomplished, and both can in comparatively hard soil layer, form, and also can in the soil layer of weakness such as mucky soil, quicksand and slity soil, form, and this anti-floating stake can obtain higher anti-floating power behind the maintenance certain hour.
More than show and described basic principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the manual just explains principle of the present invention; The present invention also has various changes and modifications under the prerequisite that does not break away from spirit and scope of the invention, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection domain to be defined by appending claims and equivalent thereof.
Claims (19)
1. novel energy-conserving anti-floating stake comprises a pile body, and resistance to plucking muscle body is arranged in the pile body, it is characterized in that, resistance to plucking muscle body is with the anticorrosion metal tube.
2. a kind of novel energy-conserving anti-floating according to claim 1 stake is characterized in that, is connected with the parts that at least one increases frictional resistance on the resistance to plucking muscle body.
3. a kind of novel energy-conserving anti-floating according to claim 2 stake is characterized in that, the parts that increase frictional resistance are anchor ingot plate.
4. a kind of novel energy-conserving anti-floating according to claim 2 stake is characterized in that, the parts that increase frictional resistance are the stake point, and the stake point is connected to the front end of resistance to plucking muscle body.
5. a kind of novel energy-conserving anti-floating according to claim 2 stake is characterized in that, is connected with the anchor ingot plate of at least one on the resistance to plucking muscle body, and resistance to plucking muscle body front end connects the stake point simultaneously.
6. a kind of novel energy-conserving anti-floating according to claim 5 stake is characterized in that, described resistance to plucking muscle body, stake point, anchor ingot plate and anticorrosion metal tube and material of body of a pile bond together.
7. a kind of novel energy-conserving anti-floating according to claim 1 stake is characterized in that the anticorrosion metal tube is the metal tube with corrosion resistance, and thickness of steel pipe is more than or equal to 0.5mm.
8. according to claim 3 or 5 or 6 described a kind of novel energy-conserving anti-floating stakes, it is characterized in that the anchor ingot plate that connects on the described resistance to plucking muscle body is processed by metal or high-strength nonmetals.
9. according to claim 3 or 5 or 6 described a kind of novel anti-floating stakes, it is characterized in that described anchor ingot plate is disc, diameter is 50～500mm, thickness 5～100mm.
10. according to claim 3 or 5 or 6 described a kind of novel anti-floating stakes, it is characterized in that described anchor ingot plate is polygon, the length of side 50～500mm, thickness 5～100mm.
11., it is characterized in that described anchor ingot plate is irregularly shaped, thickness 5～100mm according to claim 3 or 5 or 6 described a kind of novel anti-floating stakes.
12. a kind of novel energy-conserving anti-floating according to claim 1 stake; It is characterized in that the pile body of anti-floating stake is the cement soil pile of churning formation, the cement soil pile that stirs formation, the cement soil pile that rotary jet stirring forms, the pile body of cement paste perfusion formation or the pile body that concrete spouting forms.
13. a kind of novel energy-conserving anti-floating according to claim 1 stake is characterized in that, said resistance to plucking muscle body is non-bending steel cable, bonding steel strand, part the wherein a kind of of steel strand, wire rope, reinforcing bar, steel pipe, section bar that bond.
14. according to claim 3 or 5 or 6 described a kind of novel energy-conserving anti-floating stakes, it is characterized in that resistance to plucking muscle body is made up of 1 above thread like material, anchor ingot plate links to each other with resistance to plucking muscle body.
15. a kind of novel energy-conserving anti-floating according to claim 1 stake is characterized in that, the pile body external diameter of anti-floating stake is 80mm-1500mm.
16. a kind of novel energy-conserving anti-floating according to claim 1 stake is characterized in that, the pile body of anti-floating stake diameter along its length is identical.
17. a kind of novel energy-conserving anti-floating according to claim 1 stake is characterized in that, the pile body of anti-floating stake diameter along its length is different.
18., it is characterized in that the stake point is cylindrical body, is processed by metal material or nonmetals according to claim 4 or 5 or 6 described a kind of novel energy-conserving anti-floating stakes.
19. a kind of novel energy-conserving anti-floating according to claim 1 stake; It is characterized in that; Extend in the structure base plate at the top of anti-floating stake resistance to plucking muscle body and anticorrosion metal tube; The protecting tube top is provided with a backing plate, and backing plate top is provided with the ground tackle of a pinning resistance to plucking muscle, and resistance to plucking muscle upper end connects special mould clamp.
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| CN103276724A (en) * | 2013-06-25 | 2013-09-04 | 青岛理工大学 | Anti-floating pile with built-in non-metallic reinforcement |
| CN103924589A (en) * | 2014-03-14 | 2014-07-16 | 苏州市能工基础工程有限责任公司 | Prestressed anti-floating anchor bolt and construction method thereof |
| CN104196021A (en) * | 2014-08-26 | 2014-12-10 | 深圳市工勘岩土集团有限公司 | Uplift pile structure and construction method thereof |
| CN106638655A (en) * | 2017-02-22 | 2017-05-10 | 北京健安诚岩土工程有限公司 | Conical-head tendon body post-tensioning pile foundation and construction process thereof |
| CN107338792A (en) * | 2017-06-16 | 2017-11-10 | 中建市政工程有限公司 | Prestressed cement mixing pile and construction method thereof |
| CN108301428A (en) * | 2018-03-23 | 2018-07-20 | 健安诚（内蒙古）新能源科技有限公司 | The pre- tensioning post-tensioning pile foundation of stake top and construction technology |
| CN110847167A (en) * | 2019-11-27 | 2020-02-28 | 研建创科(北京)科技有限公司 | Combined enhanced uplift anchor rod device and construction method |
| CN111677018A (en) * | 2020-06-28 | 2020-09-18 | 中国能源建设集团广东省电力设计研究院有限公司 | Novel uplift-resistant pile cap |
| CN113152535A (en) * | 2021-04-23 | 2021-07-23 | 建研地基基础工程有限责任公司 | Rear-inserted unbonded steel strand pressure-bearing type uplift pile construction method and assembly used in same |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103276724B (en) * | 2013-06-25 | 2016-01-13 | 青岛理工大学 | Anti-floating pile with built-in non-metallic reinforcement |
| CN103276724A (en) * | 2013-06-25 | 2013-09-04 | 青岛理工大学 | Anti-floating pile with built-in non-metallic reinforcement |
| CN103924589A (en) * | 2014-03-14 | 2014-07-16 | 苏州市能工基础工程有限责任公司 | Prestressed anti-floating anchor bolt and construction method thereof |
| CN103924589B (en) * | 2014-03-14 | 2015-10-28 | 苏州市能工基础工程有限责任公司 | prestressed anti-floating anchor rod and construction method thereof |
| CN104196021A (en) * | 2014-08-26 | 2014-12-10 | 深圳市工勘岩土集团有限公司 | Uplift pile structure and construction method thereof |
| CN106638655B (en) * | 2017-02-22 | 2019-04-05 | 北京健安诚岩土工程有限公司 | Conehead muscle body post-tensioning pile foundation and construction technology |
| CN106638655A (en) * | 2017-02-22 | 2017-05-10 | 北京健安诚岩土工程有限公司 | Conical-head tendon body post-tensioning pile foundation and construction process thereof |
| CN107338792A (en) * | 2017-06-16 | 2017-11-10 | 中建市政工程有限公司 | Prestressed cement mixing pile and construction method thereof |
| CN108301428A (en) * | 2018-03-23 | 2018-07-20 | 健安诚（内蒙古）新能源科技有限公司 | The pre- tensioning post-tensioning pile foundation of stake top and construction technology |
| CN110847167A (en) * | 2019-11-27 | 2020-02-28 | 研建创科(北京)科技有限公司 | Combined enhanced uplift anchor rod device and construction method |
| CN111677018A (en) * | 2020-06-28 | 2020-09-18 | 中国能源建设集团广东省电力设计研究院有限公司 | Novel uplift-resistant pile cap |
| CN113152535A (en) * | 2021-04-23 | 2021-07-23 | 建研地基基础工程有限责任公司 | Rear-inserted unbonded steel strand pressure-bearing type uplift pile construction method and assembly used in same |
| CN113152535B (en) * | 2021-04-23 | 2022-02-11 | 建研地基基础工程有限责任公司 | Rear-inserted unbonded steel strand pressure-bearing type uplift pile construction method and assembly used in same |
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| CN102418339B (en) | 2012-12-26 |
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