CN108978650A - A kind of retarded adhesive prestressed single-pile foundation - Google Patents
A kind of retarded adhesive prestressed single-pile foundation Download PDFInfo
- Publication number
- CN108978650A CN108978650A CN201810965260.0A CN201810965260A CN108978650A CN 108978650 A CN108978650 A CN 108978650A CN 201810965260 A CN201810965260 A CN 201810965260A CN 108978650 A CN108978650 A CN 108978650A
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- CN
- China
- Prior art keywords
- ontology
- pile foundation
- delayed bonding
- retarded adhesive
- bonding prestressed
- Prior art date
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- Pending
Links
- 239000000853 adhesive Substances 0.000 title claims abstract description 23
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 23
- 230000003111 delayed effect Effects 0.000 claims abstract description 51
- 210000002435 tendon Anatomy 0.000 claims abstract description 51
- 230000002787 reinforcement Effects 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 8
- 210000003205 muscle Anatomy 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 8
- 238000005452 bending Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 238000004873 anchoring Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/58—Prestressed concrete piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/16—Foundations formed of separate piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0046—Production methods using prestressing techniques
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a kind of retarded adhesive prestressed single-pile foundations, including ontology, it is equipped with several delayed bonding prestressed tendons along longitudinal direction in the ontology, wherein the delayed bonding prestressed tendon is greater than the arrangement quantity in the compression-side of the ontology in the arrangement quantity of the tension side of the ontology.The present invention increases delayed bonding prestressed tendon in single-pile foundation, by calculating single-pile foundation pile body institute bending moment, according to single-pile foundation not having in tension side and compression-side load, bigger tensile strength is needed in tension side, therefore, it is greater than compression-side in the quantity of the delayed bonding prestressed tendon of tension side setting, along pile body, delayed bonding prestressed tendon is rationally set, it can not only be under the premise of meeting bearing requirements, reduce stake diameter and reduces the quantity of regular reinforcement, and the advantages of having bonding and Non-cohesive Prestressing Force Technology, is combined, it maximizes favourable factors and minimizes unfavourable ones, without reserving hole channel, without grouting, easy construction, structure is safe and reliable.
Description
Technical field
The present invention relates to track engineering field, in particular to a kind of retarded adhesive prestressed single-pile foundation.
Background technique
For suspension type monorail because pier shaft is higher, line spacing is larger, and basis top institute bending moment is larger, excavates and subtracts to reduce
Few construction period, basis is often arranged to single-pile foundation, when single-pile foundation pile body institute bending moment is larger, by increasing stake diameter
And the quantity of regular reinforcement come resist bending be it is uneconomical and less reasonable, therefore, how to meet load requirement
Under the premise of, realize that reducing stake diameter and driving depth is of great significance to single-pile foundation.
Summary of the invention
It is an object of the invention to overcome the above-mentioned deficiency in the presence of the prior art, provide a kind of retarded adhesive prestressed
Single-pile foundation.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes:
A kind of retarded adhesive prestressed single-pile foundation, including ontology are equipped with several slow cohesions in the ontology and answer in advance
Power muscle, wherein the delayed bonding prestressed tendon is greater than the compression in the ontology in the arrangement quantity of the tension side of the ontology
The arrangement quantity of side.
Delayed bonding prestressed tendon refers in construction stage prestress wire dilatation freedom, not with around, slow setting is bonded
Agent generates bonding, and presstressed reinforcing steel passes through cured slow setting adhesive and surrounding concrete in predetermined period after the completion of construction
Generate cementation.
The present invention increases delayed bonding prestressed tendon in single-pile foundation, and curved suffered by single-pile foundation pile body by calculating
Square is needed according to single-pile foundation in the difference of tension side (lineback trackside) and compression-side (upper thread trackside) load in tension side
Therefore tensile strength that will be bigger is greater than compression-side in the quantity of the delayed bonding prestressed tendon of tension side setting, reasonable along pile body
Delayed bonding prestressed tendon is set, can not only reduce stake diameter under the premise of meeting bearing requirements and reduce the quantity of regular reinforcement,
And the advantages of having bonding and Non-cohesive Prestressing Force Technology is combined, it maximizes favourable factors and minimizes unfavourable ones, is not necessarily to reserving hole channel, without grouting, apply
Work is easy, and structure is safe and reliable.
In particular, the retarded adhesive prestressed single-pile foundation can be directly used for assembled installation, due to using slow cohesion
Presstressed reinforcing steel, can be to be transported when being assembled to scene in factory process, with regard to pre-buried delayed bonding prestressed tendon, then tensioning
The presstressed reinforcing steel can not only save prefabrication and field erected time, process, reduce labor cost and construction cost,
Moreover, avoiding loss of prestress caused by too early tensioning.
Preferably, the delayed bonding prestressed tendon is symmetrical arranged along the horizontal path centerline axis of the ontology, convenient
Processing and installation.
Preferably, in ontology arrangement, there are many delayed bonding prestressed tendons of different length, and closer to described
The quantity of the top area of ontology, the corresponding delayed bonding prestressed tendon of the ontology unit area is more.According to single pile base
The requirement of plinth structure stress, the delayed bonding prestressed tendon of settable a variety of different sizes, in the case where meeting load requirement, section
The about setting of delayed bonding prestressed tendon, has saved material and construction cost.
Specifically, the ontology top area and be located at tension side adjacent two delayed bonding prestressed tendons it
Between angle be 10 ° -30 °, the ontology bottom section and be located at adjacent two of tension side it is described retarded adhesive prestressed
Angle between muscle is 40 ° -80 °.
Preferably, when delayed bonding prestressed tendon described in tensioning, the longer delayed bonding prestressed tendon of pretensioning length, then
The shorter delayed bonding prestressed tendon of tensioning length.In general, tensioned prestressing bar should be divided into two stages progress, work as stake
The solidifying native intensity of body and elasticity modulus reach the 95% of design value, and carry out phase tensioning, a phase tensioning steel when 10 day age of satisfaction
Beam is the longer steel beam of length, after phase tensioning, after the completion of bridge pier and beam body are set up, and tensioning residue steel beam.
Preferably, the delayed bonding prestressed tendon is pierced by the top of the ontology, and is fixed on the ontology by anchorage
On.
Preferably, the anchorage uses low retraction anchorage, and retraction value is less than or equal to 10mm, and anchorage is grasped in anchoring operation
Make simple and effective, and stability is high.
Preferably, the anchorage is surrounded by sealing off and covering anchorage concrete.
Preferably, the delayed bonding prestressed tendon is positioned by Steel bar rack.
Preferably, the delayed bonding prestressed tendon is high-strength underrelaxation slow-adhesion prestress steel strand.
Compared with prior art, beneficial effects of the present invention:
The present invention increases delayed bonding prestressed tendon in single-pile foundation, and curved suffered by single-pile foundation pile body by calculating
Square is needed according to single-pile foundation in the difference of tension side (lineback trackside) and compression-side (upper thread trackside) load in tension side
Therefore tensile strength that will be bigger is greater than compression-side in the quantity of the delayed bonding prestressed tendon of tension side setting, reasonable along pile body
Delayed bonding prestressed tendon is set, can not only reduce stake diameter under the premise of meeting bearing requirements and reduce the quantity of regular reinforcement,
And the advantages of having bonding and Non-cohesive Prestressing Force Technology is combined, it maximizes favourable factors and minimizes unfavourable ones, is not necessarily to reserving hole channel, without grouting, apply
Work is easy, and structure is safe and reliable.
In particular, the retarded adhesive prestressed single-pile foundation can be directly used for assembled installation, due to using slow cohesion
Presstressed reinforcing steel, can be to be transported when being assembled to scene in factory process, with regard to pre-buried delayed bonding prestressed tendon, then tensioning
The presstressed reinforcing steel can not only save prefabrication and field erected time, process, reduce labor cost and construction cost,
Moreover, avoiding loss of prestress caused by too early tensioning.
Detailed description of the invention:
Fig. 1 is the structural schematic diagram of the retarded adhesive prestressed single-pile foundation of one kind of the present invention.
Fig. 2 is the A-A cross-sectional view in Fig. 1.
Fig. 3 is the B-B cross-sectional view in Fig. 1.
Fig. 4 is the C-C cross-sectional view in Fig. 1.
Fig. 5 is the anchoring schematic diagram of delayed bonding prestressed tendon of the present invention.
Marked in the figure: 1- ontology, 11- tension side, 12- compression-side, 2- delayed bonding prestressed tendon, 3- anchorage, 4- reinforcing bar, 5-
Sealing off and covering anchorage concrete, 6- parallel circuit center line, 7- horizontal path center line.
Specific embodiment
Below with reference to test example and specific embodiment, the present invention is described in further detail.But this should not be understood
It is all that this is belonged to based on the technology that the content of present invention is realized for the scope of the above subject matter of the present invention is limited to the following embodiments
The range of invention.
As shown in Figure 1, a kind of retarded adhesive prestressed single-pile foundation, including ontology 1, the ontology 1 are armored concrete
Structure is equipped with several reinforcing bars 4 in the ontology 1 along longitudinal direction.The ontology 1 can position according to installation and loading characteristic,
It is divided into tension side 11 and compression-side 12, specifically, tension side 11 is normally at lineback trackside, compression-side 12 is then located at upper thread road
Side.There are two symmetry axis in the generally circular in cross section section of the ontology 1, according to the positional relationship with driving route, respectively in parallel
Central lines of track 6 and horizontal path center line 7.
As shown in figs 2-4, several delayed bonding prestressed tendons 2 are additionally provided in the ontology 1, the slow cohesion is answered in advance
Power muscle 2 is positioned by Steel bar rack, and the delayed bonding prestressed tendon 2 is twisted using the retarded adhesive prestressed steel of high-strength underrelaxation
Line.And the delayed bonding prestressed tendon 2 is significantly greater than in the arrangement quantity of the tension side 11 of the ontology 1 in the ontology 1
The arrangement quantity of compression-side 12, the delayed bonding prestressed tendon 2 are set along 7 axial symmetry of horizontal path center line of the ontology 1
It sets.
The delayed bonding prestressed tendon 2 includes mainly two different length, as shown in Fig. 2, at the top of the ontology 1
When, the delayed bonding prestressed tendon 2 of different length is pierced by the top of the ontology 1, and is fixed on the ontology 1 by anchorage 3
On, sealing off and covering anchorage (as shown in Figure 5) is finally carried out by sealing off and covering anchorage concrete 5 again, compared with bonded prestress, delayed bonding prestressed tendon
2 do not need to wear bellows, do not need to be in the milk, and reduce twice complicated procedures of forming, and reducing live manual operation influences, construction quality
It is easy to get guarantee.
As shown in figure 3, the quantity of the delayed bonding prestressed tendon 2 is more, including two kinds at the top of the ontology 1
The delayed bonding prestressed tendon 2 of different length, the angle a between adjacent two delayed bonding prestressed tendons 2 of tension side are
10 ° -30 °, two delayed bonding prestressed tendons 2 are then only set in compression-side.
As shown in figure 4, the quantity of the delayed bonding prestressed tendon 2 significantly reduces, shorter at the lower part of the ontology 1
Delayed bonding prestressed tendon 2 all terminate at the middle part of ontology 1, the lower part of ontology 1 only includes that the longer slow cohesion of length is answered in advance
Power muscle 2, at this point, the angle b between adjacent two delayed bonding prestressed tendons 2 of tension side is 40 ° -80 °.
When delayed bonding prestressed tendon 2 described in tensioning, two stages progress should be divided into.When the solidifying native intensity and elasticity of ontology 1
Modulus reaches the 95% of design value, and phase tensioning is carried out when 10 day age of satisfaction, and phase tensioning steel beam is the longer steel of length
Beam, after phase tensioning, after the completion of bridge pier and beam body are set up, tensioning residue steel beam.Steel Shu Zhangla uses stretching force and elongation
Dual control, and based on the control of steel beam stretching force.
Above embodiments are only to illustrate the present invention and not limit the technical scheme described by the invention, although this explanation
The present invention has been described in detail referring to above-mentioned each embodiment for book, but the present invention is not limited to above-mentioned specific implementation
Mode, therefore any couple of present invention modifies or equivalent replacement；And the technical side of all spirit and scope for not departing from invention
Case and its improvement, are intended to be within the scope of the claims of the invention.
Claims (10)
1. a kind of retarded adhesive prestressed single-pile foundation, which is characterized in that including ontology (1), in the ontology (1) along longitudinal direction
Equipped with several delayed bonding prestressed tendons (2), wherein tension side of the delayed bonding prestressed tendon (2) in the ontology (1)
(11) arrangement quantity is greater than the arrangement quantity in the compression-side (12) of the ontology (1).
2. the retarded adhesive prestressed single-pile foundation of one kind according to claim 1, which is characterized in that the slow cohesion is answered in advance
Power muscle (2) is arranged along horizontal path center line (7) axial symmetry of the ontology (1).
3. the retarded adhesive prestressed single-pile foundation of one kind according to claim 1, which is characterized in that in the ontology (1)
Arrange the delayed bonding prestressed tendon (2) there are many different length, and the top area closer to the ontology (1), it is described
The quantity of the corresponding delayed bonding prestressed tendon (2) of ontology (1) unit area is more.
4. the retarded adhesive prestressed single-pile foundation of one kind according to claim 3, which is characterized in that in the ontology (1)
Top area and be located at tension side adjacent two delayed bonding prestressed tendons (2) between angle be 10 ° -30 °, in institute
It states the bottom section of ontology (1) and the angle being located between adjacent two delayed bonding prestressed tendons (2) of tension side is
40°-80°。
5. the retarded adhesive prestressed single-pile foundation of one kind according to claim 3, which is characterized in that slow cohesion described in tensioning
When presstressed reinforcing steel (2), the longer delayed bonding prestressed tendon (2) of pretensioning length, then shorter described slow viscous of tensioning length
It ties presstressed reinforcing steel (2).
6. the retarded adhesive prestressed single-pile foundation of one kind according to claim 1, which is characterized in that the slow cohesion is answered in advance
Power muscle (2) is pierced by the top of the ontology (1), and is fixed on the ontology (1) by anchorage (3).
7. the retarded adhesive prestressed single-pile foundation of one kind according to claim 6, which is characterized in that the anchorage (3) is adopted
With low retraction anchorage, retraction value is less than or equal to 10mm.
8. the retarded adhesive prestressed single-pile foundation of one kind according to claim 6, which is characterized in that the anchorage (3)
It is surrounded by sealing off and covering anchorage concrete (5).
9. the retarded adhesive prestressed single-pile foundation of -8 any described one kind according to claim 1, which is characterized in that described slow viscous
Knot presstressed reinforcing steel (2) is positioned by Steel bar rack.
10. the retarded adhesive prestressed single-pile foundation of -8 any described one kind according to claim 1, which is characterized in that described slow
Binding prestress reinforcement (2) is high-strength underrelaxation slow-adhesion prestress steel strand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810965260.0A CN108978650A (en) | 2018-08-22 | 2018-08-22 | A kind of retarded adhesive prestressed single-pile foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810965260.0A CN108978650A (en) | 2018-08-22 | 2018-08-22 | A kind of retarded adhesive prestressed single-pile foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108978650A true CN108978650A (en) | 2018-12-11 |
Family
ID=64547390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810965260.0A Pending CN108978650A (en) | 2018-08-22 | 2018-08-22 | A kind of retarded adhesive prestressed single-pile foundation |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020089029A (en) * | 2001-05-22 | 2002-11-29 | 이윤주 | Reinforced Method of Head in a Prestressed Spun High Strength Concrete Pile |
| JP2002371529A (en) * | 2001-06-13 | 2002-12-26 | Nippon Steel Corp | Water area structure with retarding chamber |
| CN101629418A (en) * | 2009-08-03 | 2010-01-20 | 天津市建筑科学研究院 | Post-tensioned prestressing cast pile and construction method thereof |
| CN103835311A (en) * | 2014-02-25 | 2014-06-04 | 中交第一航务工程勘察设计院有限公司 | Post-tensioned prestressing underground diaphragm wall and construction method |
| CN105350531A (en) * | 2015-10-21 | 2016-02-24 | 葛建 | Pipe pile-anchor rod composite foundation capable of bearing pulling and pressing bidirectional loads and construction technology |
| CN206512711U (en) * | 2017-02-24 | 2017-09-22 | 中铁二十五局集团第五工程有限公司 | A kind of slow-adhesion prestress steel strand fixed structure |
| CN208668406U (en) * | 2018-08-22 | 2019-03-29 | 中铁二院工程集团有限责任公司 | A kind of retarded adhesive prestressed single-pile foundation |
-
2018
- 2018-08-22 CN CN201810965260.0A patent/CN108978650A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020089029A (en) * | 2001-05-22 | 2002-11-29 | 이윤주 | Reinforced Method of Head in a Prestressed Spun High Strength Concrete Pile |
| JP2002371529A (en) * | 2001-06-13 | 2002-12-26 | Nippon Steel Corp | Water area structure with retarding chamber |
| CN101629418A (en) * | 2009-08-03 | 2010-01-20 | 天津市建筑科学研究院 | Post-tensioned prestressing cast pile and construction method thereof |
| CN103835311A (en) * | 2014-02-25 | 2014-06-04 | 中交第一航务工程勘察设计院有限公司 | Post-tensioned prestressing underground diaphragm wall and construction method |
| CN105350531A (en) * | 2015-10-21 | 2016-02-24 | 葛建 | Pipe pile-anchor rod composite foundation capable of bearing pulling and pressing bidirectional loads and construction technology |
| CN206512711U (en) * | 2017-02-24 | 2017-09-22 | 中铁二十五局集团第五工程有限公司 | A kind of slow-adhesion prestress steel strand fixed structure |
| CN208668406U (en) * | 2018-08-22 | 2019-03-29 | 中铁二院工程集团有限责任公司 | A kind of retarded adhesive prestressed single-pile foundation |
Non-Patent Citations (1)
| Title |
|---|
| 全国高校建筑施工研究会: "高效预应力结构设计施工实例应用手册", 中国建筑工业出版社, pages: 1056 - 1057 * |
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