CN107268609B - A kind of double-layer structure damping stake and its construction method - Google Patents
A kind of double-layer structure damping stake and its construction method Download PDFInfo
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- CN107268609B CN107268609B CN201710419713.5A CN201710419713A CN107268609B CN 107268609 B CN107268609 B CN 107268609B CN 201710419713 A CN201710419713 A CN 201710419713A CN 107268609 B CN107268609 B CN 107268609B
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- layer structure
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- 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
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/08—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against transmission of vibrations or movements in the foundation soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2200/00—Geometrical or physical properties
- E02D2200/16—Shapes
- E02D2200/1607—Shapes round, e.g. circle
- E02D2200/1621—Shapes round, e.g. circle made from multiple elements
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The present invention provides a kind of double-layer structure damping stake and construction methods, a kind of double-layer structure damping stake includes being made of rigid exterior wall, buffering inner core and flexible sleeve, the rigid exterior wall is in outermost, followed by it is in the flexible sleeve at middle part, penetralia is the buffering inner core, the effect of the rigid exterior wall is to bear top bearing capacity, meets static design requirement；The effect of the buffering inner core is to absorb the energy such as vibration, meets damping (such as earthquake, Traffic loading) requirement.The present invention is with beneficial effect: having damping energy absorption characteristics inside pile body, influence of the earthquake to superstructure is effectively reduced；The buffering inner core can be dregs foam concrete, green, environmental protection.
Description
Technical field
Belong to Soft Ground and pile foundation technical field, in particular to core is filled out using foam concrete and form double-layer structure
A kind of construction method of damping stake.It is mainly used for the field of engineering technology such as high-speed railway, highway soft soil ground processing.
Background technique
Earthquake, vehicular load generate vibration wave, different influences are generated to foundation, and then influence superstructure
Normal use and the serious secondary disaster of generation.Mainly start at present from isolation structure angle for basic earthquake research, i.e.,
Seismic Isolation of Isolation Layer, such as rubber support are set between superstructure and basal layer, vibration is obstructed or reduced by isolation structure consumption
Energy transmission.Traditional Aseismic Structure System, which mainly passes through, improves structure stiffness by itself and ductility enhancing anti-seismic performance, still, one
It improves to taste the rigidity of structure and is more advantageous to vibration energy propagation instead, be unfavorable for antidetonation, solely improve structure itself ductility, meeting
Enhancing structure energy dissipation capacity, but its inertia force also increases simultaneously, and structure absorbs more energy, situation higher for building
It will have adverse effect on.In view of the limitation for improving traditional Aseismic Structure System method, Most scholars are by antidetonation skill
Art research direction concentrates on shock insulation field, and the shock resistance research of shorter mention anti-seismic structure itself.
Design currently for rigid foundation such as steel bar concrete pile (including reinforced concrete pipe pile) is usually to ignore
Its antihunt action, when superstructure needs Aseismic Design, generally use " shock insulation " measure for example installed at the top of pile foundation it is soft
Property support carries out antidetonation；For flexible pile such as cement mixing method, since its vibration deformation is big, destructible does not have ductility energy
Power does not have antidetonation stake performance thus yet.A kind of antidetonation that Chinese patent " anti-seismic construction pile " (CN201210151718.1) proposes
Building stake includes concrete king pile, elastic, three sections of cast concrete base along pile body from top to bottom, buffers antidetonation using elastic,
Mainly there is a preferable buffer function to the i.e. vertical vibration of the longitudinal wave of seismic wave, but since this pile-type is by three sections of different-stiffness
Pile body is composed, and pile body globality is naturally also poor, when horizontal vibrating occurs for the shear wave that it receives seismic wave, three Duan Butong
The vibration deformation of rigidity pile body is uncoordinated, the serious consequences such as Yi Fasheng broken pile, therefore the anti-seismic performance of the pile-type has its limitation；
In addition, CN200810132936.4 provides seismic ecological bearing pile, and it is an object of the present invention to provide a kind of bearing pile, mainly
By lower because of the reduction of bearing capacity caused by liquefaction of soil mass and simultaneously reduce water in a sinking watching to the resistance at stake end come
The shock resistance of stake is improved, this method is primarily adapted for use in the liquescent sandy soil foundation region of earthquake, and very low or even not to content
Its antihunt action of the foundation soil of sandy soil ceases to be in force automatically, and depend merely on pile body water discharge method come reduce pile peripheral earth liquefaction range have
It limits, anti seismic efficiency is difficult to realize on a large scale, and therefore, this method is realized antidetonation purpose simply by round-about way and do not changed
Kind stake shock resistance itself；
In addition, CN201310345896.2 provides a kind of construction method of major diameter Light deformation damping pile wall separation layer
And structure, it is isolated in building construction process apart from the closer hole stake of side slope for solving the problems, such as, thus pile body
The stability influence of horizontal load-bearing deformation side slope is minimum.But the pile-type itself is not belonging to antidetonation stake scope, is merely given as
Reduce a kind of construction method that the horizontal load-bearing vibration Slope Stability of pile body influences, is not to reduce earthquake to pile body and destroy
For the purpose of influence, there is essential distinction with " damping stake " proposed by the invention.
With the rapid development of our country's economy, the soft soil foundation of high-speed railway, highway is frequently with pile foundation composite foundation method
Processing, and do not use generally Seismic Isolation of Isolation Layer to carry out Aseismic Design, therefore improving pile foundation self structure anti-seismic performance is that its antidetonation is set
Count one of optimal path.
Summary of the invention
In view of the problems existing in the prior art, the double-layer structure damping stake that the present invention makes is mentioned by changing self structure
Itself high anti-seismic performance has stronger shock resistance compared with traditional rigid pile, flexible pile.What the present invention to be solved simultaneously
One real contradiction is engineering spoir storage problem, and practical based on the above engineering, the present invention proposes a kind of double-layer structure damping stake
And its construction method.
The invention is realized by the following technical scheme: the primary purpose of the present invention is that providing a kind of double-layer structure damping
Stake, including, it is made of rigid exterior wall, buffering inner core and flexible sleeve, the rigid exterior wall is in outermost, is followed by
The flexible sleeve at middle part, penetralia are the buffering inner cores, and the effect of the rigid exterior wall is to bear top bearing capacity, full
Sufficient static design requirement；The effect of the buffering inner core is to absorb the energy such as vibration, meets damping (such as earthquake, Vehicular vibration
Load etc.) it requires.
More importantly according to a kind of aforementioned double-layer structure damping stake, the rigid exterior wall in a ring, according to pile
The deformation modulus of the preferred material of construction technology is 1-200GPa, overall diameter 30-2000mm, wall thickness 20-1000mm.
As a preference, the rigid exterior wall uses C30 concrete, deformation modulus 30GPa, diameter 1200mm, wall
Thick 400mm.
More importantly according to a kind of aforementioned double-layer structure damping stake, according to the preferably described buffering of bore forming technology
Inner core is rounded, and material can resist buffering energy up to 10-1000kJ, diameter 10-1800mm.
As a preference, the buffering inner core uses dregs foam concrete, it is calculated according to composition material ratio
Its density 400-1200kg/m3, intensity 0.5-3Mpa, can resist absorb energy 20-100kJ, diameter 400mm.
The material of the dregs foam concrete forms cement, water, engineering spoir, foaming agent, and preferred mass ratio is 1:
1.05-1.25:1-3:0.001-0.01.
As a preference, the flexible sleeve, diameter 400mm, can be plastic bushing or steel sleeve.
The ratio and performance of aforementioned each building block are preferred embodiments of the invention, by cooperating, compared to tradition
Rigid pile, flexible pile compares, hence it is evident that there is stronger shock resistance.
Foam concrete proposed by the invention is not limited to that the materials such as flyash can also be used using dregs material, and
And the match ratio of material is also not necessarily limited to uniquely, to can be made into the foam concrete of various types and intensity, finally obtains satisfaction
The double-layer structure damping stake of various needs.
Inner cavity casting normal concrete in present invention proposition first between outside of sleeve and hole wall forms concrete tubular pile
Construction method be also not limited to this one kind, can also be and directly place prefabricated concrete tubular pile in stake holes, then at it
It is poured foam concrete in hole and forms double-layer structure damping stake.
Another object of the present invention is to provide a kind of construction methods of double-layer structure damping stake, sketch main construction
Method comprises the following steps that
(1) smooth location, surveying setting-out, using mechanical hole building (such as long auger) to projected depth, vertical degree of the peg hole
Deviation is not more than 1%, to guarantee that rigid exterior wall thickness is uniform；
(2) casing is placed in stake holes center；
(3) normal concrete and foam concrete are prepared, it should however be pointed out the foam concrete uses field engineering spoir
For the preparation method of raw material, workability meets pipe and send requirement；
Conduit is transferred, while being poured the concrete outside described sleeve pipe (i.e. rigid exterior wall) and internal foam concrete (i.e.
Buffer inner core), that is, form double-layer structure damping stake.
Above-mentioned construction method is with stake diameter 1200mm, for inner core diameter is 400mm.
The beneficial effect that the present invention obtains compared with the existing technology includes:
Based on current basic anti-seismic performance present Research, in conjunction with concrete tubular pile and foam concrete reapective features, this hair
Bright to propose double-layer structure damping stake and its construction method, which has its comprehensive advantage.
(1) there are energy-absorbing shock-resistance features.It is less at present to the research of Anti-seismic Pile Foundation performance mainly from " shock insulation " angle
Start with from structure itself.Double-layer structure damping stake proposed by the present invention buffering inner core position using dregs foam concrete,
Since the porosity of foam concrete makes it have lower elasticity modulus and compared with highly energy-consuming, compared to other kinds of rigidity
Stake and flexible pile, solid pile of the present invention have certain energy-absorbing function of seismic resistance.
(2) environmentally protective.The buffering inner core at position uses foam coagulation among double-layer structure damping stake proposed by the present invention
Soil fills out core, which uses dregs for one of raw material, substitutes common building material sandstone, solves part building slag
Soil is difficult for soil outward transport, reduces spoir pollution and reduces engineering cost, while reducing reduction construction material sandstone dosage, real
Now economize on resources, protect the purpose of environment.
Detailed description of the invention
Fig. 1 is the double-layer structure damping stake schematic cross-section that foam concrete of the present invention fills out core, wherein 1 is rigid exterior wall；
2 be buffering inner core；3 be flexible sleeve；4 be energy wave.
Specific embodiment
Below with reference to technical method and detail drawing, the present invention is described in further detail, but the embodiment invented is unlimited
In this.
Embodiment one
Shown in referring to Fig.1, a kind of double-layer structure damping stake, including, by rigid exterior wall, buffering inner core and flexible sleeve group
At, the rigid exterior wall is in outermost, is followed by the flexible sleeve at middle part, and penetralia is the buffering inner core,
The rigid exterior wall uses C30 concrete, diameter 1200mm, wall thickness 400mm.The buffering inner core uses dregs foam concrete
Material composition, cement, water, engineering spoir, foaming agent mass ratio be 1:1.05-1.25:1-3:0.001-0.01, density
800kg/m3, intensity 2Mpa, can resist absorb energy 60kJ, diameter 400mm.
Specific steps are as follows: (1) smooth location, surveying setting-out, using mechanical hole building (such as long auger) to projected depth,
Vertical degree of the peg hole deviation is not more than 1%, guarantees that subsequent double-layer structure damping stake outer tube wall thickness is uniform up and down；(2) casing 3 is placed
In stake holes center；(3) normal concrete and foam concrete are prepared, it should however be pointed out the foam concrete is using live work
Journey spoir is the preparation method of raw material, i.e., required raw material composition: cement, water, engineering spoir, foaming agent；(4) conduit is transferred, together
When in the outside of casing 3 and inside, 1 normal concrete of rigid exterior wall and buffering 2 foam concrete of inner core of casting are formed double-deck
Structural damping stake.Vibration energy is propagated as shown, being conducive to vibration energy propagation.
Embodiment two
On the basis of previous embodiment one, mattress layer is added at double-layer structure damping stake top end, can be formed compoundly
Base can be used for handling the soft soil foundation in the engineerings such as high-speed railway, highway.
Embodiment three
On the basis of previous embodiment one, above-mentioned solid pile is not only limited to form compound foundation to handle Soft Soil
Plinth, can also between outside of sleeve and hole wall in intracavitary setting steel reinforcement cage, also or casing use steel pipe, carrying can be formed
The higher double-layer structure damping stake of power is used for Pile Foundation.
Double-layer structure damping stake is formed in above embodiments, since it buffers inner core 2 using containing a large amount of intensive small gas
The foam concrete in hole is filled out core and is formed, when the shock wave of earthquake or vehicular load be passed to its it is internal when, shock wave can be a large amount of at these
It constantly reflects and transmits in the hole wall of stomata and hole, and foam concrete can also generate one due to its lower elasticity modulus
Fixed deformation, so that the energy of shock wave can be largely consumed.On the other hand, the normal concrete of double-layer structure damping stake is rigid
Property outer wall 1 support superstructure load, while guaranteeing that buffering inner core works normally, it is final to realize damping purpose, compared to tradition
Rigid pile, flexible pile compares, hence it is evident that there is stronger shock resistance.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (8)
1. a kind of double-layer structure damping stake, it is characterised in that: it is made of rigid exterior wall, buffering inner core and flexible sleeve, it is described
Rigid exterior wall is in outermost, is followed by the flexible sleeve at middle part, and the flexible sleeve is plastic bushing, and penetralia is institute
The buffering inner core stated, buffering inner core use dregs foam concrete, density 400-1200kg/m3, intensity 0.5-3Mpa can resist
Absorb energy 20-100kJ, dregs foamed concrete material composition: cement, water, engineering spoir, foaming agent mass ratio are 1:
1.05-1.25:1-3:0.001-0.01, the effect of the rigid exterior wall are to bear top bearing capacity, meet static design and want
It asks；The effect of the buffering inner core is to absorb vibration energy, meets damping requirement.
2. double-layer structure damping stake according to claim 1, it is characterised in that: the rigid exterior wall in a ring, material
Deformation modulus be 1-200GPa, overall diameter 30-2000mm, wall thickness 20-1000mm.
3. double-layer structure damping stake according to claim 2, it is characterised in that: the rigid exterior wall uses C30 concrete,
Diameter 1200mm, wall thickness 400mm.
4. double-layer structure damping stake according to claim 1, it is characterised in that: the buffering inner core is rounded, material
Buffering energy can be resisted up to 10-1000kJ, diameter 10-1800mm.
5. double-layer structure damping stake according to claim 4, it is characterised in that: the buffering inner core diameter 400mm.
6. double-layer structure damping stake according to claim 4, it is characterised in that: dregs foam concrete uses flyash material
Material replacement.
7. double-layer structure damping stake according to claim 1, it is characterised in that: the flexible sleeve diameter is 400mm.
8. a kind of construction method of any one of -7 double-layer structure damping stakes according to claim 1, it is characterised in that:
Step 1: smooth location, surveying setting-out, using mechanical hole building to projected depth, vertical degree of the peg hole deviation is not more than 1%；
Step 2: casing is placed in stake holes center；
Step 3: preparing normal concrete and dregs foam concrete, and workability meets pipe and send requirement；
Step 4: putting down conduit, while being poured the normal concrete outside described sleeve pipe and internal dregs foam concrete, i.e. shape
At the double-deck structural damping stake.
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| CN201710419713.5A CN107268609B (en) | 2017-06-06 | 2017-06-06 | A kind of double-layer structure damping stake and its construction method |
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| CN108038272B (en) * | 2017-11-23 | 2021-06-18 | 同济大学 | Method for weakening ground vibration caused by large-scale structure collapse |
| CN108298913B (en) * | 2018-04-03 | 2021-02-12 | 中国矿业大学 | Prestressed pipe pile suitable for underground sulfate corrosion environment and preparation method thereof |
| CN109322299A (en) * | 2018-11-16 | 2019-02-12 | 江苏博泓新材料科技有限公司 | A kind of rotary type composite material pile |
| CN109306704B (en) * | 2018-11-19 | 2023-12-26 | 中铁隧道局集团有限公司 | Multilayer shock absorption pile for water measurement platform |
| CN109898639B (en) * | 2019-01-31 | 2020-12-08 | 泰州市康泰建材科技有限公司 | Wavy high-rigidity anti-seismic foam concrete |
| CN111997097B (en) * | 2020-09-03 | 2021-10-01 | 西南交通大学 | Composite isolation pile for tunnel side-through house and reinforcing construction method thereof |
| CN114606988A (en) * | 2022-03-25 | 2022-06-10 | 广州地铁设计研究院股份有限公司 | Composite vibration damping device and preparation method |
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| JPH01203515A (en) * | 1988-02-05 | 1989-08-16 | Mitani Sekisan Co Ltd | Earthquake-proof pile and its construction |
| CN103088964A (en) * | 2013-01-24 | 2013-05-08 | 合肥工业大学 | Steel tube foam concrete combined upright column and construction method thereof |
| CN104177031A (en) * | 2014-08-31 | 2014-12-03 | 李小海 | Foam concrete building blocks and production method thereof |
| CN104762961A (en) * | 2015-04-21 | 2015-07-08 | 福州大学 | Ultra-high performance concrete and common concrete combined pile and construction method thereof |
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2017
- 2017-06-06 CN CN201710419713.5A patent/CN107268609B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01203515A (en) * | 1988-02-05 | 1989-08-16 | Mitani Sekisan Co Ltd | Earthquake-proof pile and its construction |
| CN103088964A (en) * | 2013-01-24 | 2013-05-08 | 合肥工业大学 | Steel tube foam concrete combined upright column and construction method thereof |
| CN104177031A (en) * | 2014-08-31 | 2014-12-03 | 李小海 | Foam concrete building blocks and production method thereof |
| CN104762961A (en) * | 2015-04-21 | 2015-07-08 | 福州大学 | Ultra-high performance concrete and common concrete combined pile and construction method thereof |
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