CN110528556A - A kind of novel foundation and construction method based on root system bionic - Google Patents
A kind of novel foundation and construction method based on root system bionic Download PDFInfo
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- CN110528556A CN110528556A CN201910747418.1A CN201910747418A CN110528556A CN 110528556 A CN110528556 A CN 110528556A CN 201910747418 A CN201910747418 A CN 201910747418A CN 110528556 A CN110528556 A CN 110528556A
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- pile
- root system
- foundation
- pile body
- taper
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- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
Abstract
A kind of novel foundation and construction method based on root system bionic, belongs to foundation engineering seismic resistance field.The problems such as solving the sinking of traditional pile foundation single pile present in earthquake, pile cover and cushion cap Joint failure, being destroyed with lateral soil movement.It is only limitted to superstructure about the innovation of bionical anti-seismic structure both at home and abroad at present, the still not correlative study to root system bionic basis does not have correlation theory formula, experiment and emulation data more.By bionics techniques, the structure design of building foundation can be improved, reinforce the research and design of related fields.Different directions are arranged by the specific position in pile foundation in the present invention, the root system bionic structure of length is distributed come the force part of discrete foundation pile, realize more Path of Force Transfer.There is better robustness relative to pile foundation, destruction of the deep foundation in macroseism can be solved very well.
Description
Technical field
The present invention relates to a kind of bionical earthquake-proof foundations, belong to foundation engineering seismic resistance field.
Background technique
With the high stratification of superstructure on basis, the development of space randomization, the form of building foundation is gradually diversified,
Deep foundation using more and more extensive.Existing deep foundation is mainly pile foundation, although pile foundation is in bearing capacity, stability, robust
Different sedimentation etc. still will appear serious destruction problem better than general basis in macroseism, such as: (1) single pile sinks
It will lead to stresses re-distribution, so as to cause stress concentration phenomenon, and only consider that upper load is distributed in when bearing capacity of pile foundation design
Each foundation pile, therefore when stress concentration pile foundation total bearing capacity is declined, and then structure basis is caused to fail；(2) pile cover with hold
Platform Joint failure will be anticipated since superstructure inertia force and the soil body move and shearing and bending failure occurs in pile cover position
Taste stake lose completely carrying effect, external loads are only born by cushion cap at this time, and cushion cap and non-principal load-bearing structure in pile foundation
Part causes foundation bearing capacity to substantially reduce, and then destroys；(3) under horizontal earthquake action, horizontal sliding occurs for the soil body, to meet
Sidesway will also occur therewith for the coordination of deformation, the stake being placed in soil, and basis is caused to generate additional stress with superstructure, thus plus
Acute basis and structural damage degree.
Therefore it can be further improved on its basis by Bionic Design for defect existing for pile foundation, invent one kind
Anti-seismic performance is preferably " root system bionic basis ".Bionics is that engineering technology developed in recent years is combined with bioscience
Cross discipline, the reasonable structure form for making full use of natural environment in biological evolution to select.By structure, the structure of simulating tree root
It makes to analyze and study it and be had the advantage that on stress performance, to simplify the mathematical modulo obtained can be applied in structure basis
Type.Structure is imitated by its root in basis based on root system bionic to be distributed with the force part of discrete foundation pile, realize more Path of Force Transfer,
There is better robustness relative to pile foundation.
It is only limitted to superstructure about the innovation of bionical anti-seismic structure both at home and abroad at present, still not to root system bionic basis
Correlative study does not have correlation theory formula, experiment and emulation data more.By bionics techniques, the knot of building foundation can be improved
Structure design, the research and design for reinforcing related fields.
Summary of the invention
The purpose of the present invention is designing a kind of bionical basis of novel root, it is single present in earthquake to solve traditional pile foundation
Stake sinks, pile cover and cushion cap Joint failure, the problems such as destroying with lateral soil movement.
To achieve the above object, the present invention uses following design scheme:
A kind of novel earthquake-proof basic model based on root system bionic, pile body part and root system bionic knot including pile foundation
Structure；The root system bionic structure design should be as follows:
(1) vertical pile body is selected, note pile body length is L；
(2) multilayer taper pile root structure is being designed along the direction pile body length L, every layer of taper pile root system is established in pile foundation
The upper surface of pile body (2), be connected with vertical pile body, every layer of taper pile root system designs one on four orthogonal directions of horizontal plane
Taper pile since the horizontal plane obliquely；The taper pile Root Distribution of different layers is in different horizontal planes along the direction pile body length L
On；Each taper pile is fixed together on the respectively described horizontal plane with the side of vertical pile body, along taper pile length direction
The extension line of extension is sent to the diametral antipodal point of vertical pile body top surface, and the diametral antipodal point is: note extends along taper pile length direction
Extension line intersect with a diameter of vertical pile body top surface, intersection point is denoted as O, and the extension line that taper pile length direction extends is vertical
Pile body top surface is projected as the diameter that a diameter endpoint is above-mentioned intersection point O, and the taper pile is fixedly connected with vertical pile body
Point is denoted as fixed intersection point, and the fixation intersection point of every layer of taper pile root system is distributed on four orthogonal directions of same level；That is taper pile
End at a distance from fixed intersection point=n times of fixed the distance between intersection point and intersection point O；Every layer of taper pile root system more leans on Vertical Pile
The value of the taper pile n at end is bigger, and the value range of n is 1 to 5；
The diameter of taper pile is vertical pile body diameter 1/5th to half.
Each vertical pile body and each taper pile are equipped with the reinforcing bar that at least one corresponds to length direction；The reinforcing bar of each taper pile
It links together with the reinforcing bar of vertical pile body.
Projection of the adjacent two layers taper pile root system in horizontal plane direction can overlap or interlock in multilayer taper pile root system.
What above-mentioned design process enumerated is only a kind of scheme, and the root system bionic structure is according to different hydrogeological items
There can be different root system bionic structural design schemes (by adjusting root structure in the position of pile body under part and the delamination of soil
It sets, sectional dimension and length etc.).The quantity of vertical stake can be one or more (usually 4-8).According to the specific hydrology
The delamination computer sim- ulation of geological conditions and soil goes out position, length and the section of the optimal root system bionic structure of anti seismic efficiency
Size can obtain best pilespacing according to known conditions for a root system bionic clump of piles.
Root system bionic taper pile is with different angle, distribution of lengths around single pile pile body.The root system of different embedded depth positions
The inclination angle of bionical taper pile (3) is determined by its depth.
Specific construction process:
(1) pile body is excavated according to design specification and requirement；
(2) using drill bit or pumping indigenous equipment at stake well head, according to specific root system bionic structural design scheme, in difference
Angle is spudded in or is realized with pumping local method；
(3) reinforcing bar needed for placing pile body and root system bionic structure.
(4) casting concrete；
(5) therewith similarly, specific pilespacing need to pass through specific hydrogeologic condition to the model foundation on clump of piles root system bionic basis
And the delamination of soil determines.
Compared with the form of existing deep foundation and theory, the present invention is analyzed and is ground by simulating structure, the construction of tree root
Study carefully it to have the advantage that on stress performance, to simplify the mathematical model obtained can be applied in structure basis.Based on root system
Structure is imitated by its root in bionical basis to be distributed (see Fig. 7, Fig. 8) with the force part of discrete foundation pile, realize more Path of Force Transfer,
There is better robustness relative to pile foundation, destruction of the deep foundation in macroseism can be solved very well.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawing.
Fig. 1 is that the mapping on 1 single pile root system bionic basis of the embodiment of the present invention illustrates schematic diagram.
Fig. 2 is the three-dimensional model schematic diagram that the present invention applies example 1 single pile root system bionic basis and cushion cap part.
Fig. 3 is the main view that the present invention applies 1 single pile root system bionic basis and cushion cap part of example.
Fig. 4 is the side view that the present invention applies 1 single pile root system bionic basis and cushion cap part of example.
Fig. 5 is the top view that the present invention applies 1 single pile root system bionic basis and cushion cap part of example.
Fig. 6 is the bottom view that the present invention applies 1 single pile root system bionic basis and cushion cap part of example.
Fig. 7 is to apply stress distribution cloud atlas under 1 single-pile foundation same displacement of example.
Fig. 8 is to apply stress distribution cloud atlas under 1 root system bionic basis same displacement of example.
Appended drawing reference: 1 --- single pile root system bionic foundation platform
2 --- the root system bionic structure on single pile root system bionic basis
3 --- the pile body on single pile root system bionic basis.
Specific embodiment
Below with reference to embodiment, the present invention will be further described, but the present invention is not limited to following embodiments.
Embodiment 1
It takes on the direction Vertical Pile body length LFor (since upper surface), fixed intersection point is remembered respectively
For B, D, F (as shown in Figure 1).
1, B, D, F are connect with endpoint O respectively, and extends OB to point A, so that AB=4OB；Extend OD
To point C, so that CD=3OD；Extend OF to E, so that EF=OF (as shown in Figure 1).
2, establishing section radius on the basis of step 3 determines root system bionic locations of structures isRoot structure.Four
It repeats the above steps on a orthogonal direction, completes the foundation of single pile root system bionic basic model.
Finite element analysis information:
Under und rained condition, two bases are all set in closely knit clay ground, clay undrained strength Cu=100KPa satisfies
With severe γsat=18KN/m3, horizontal pressure force coefficient takes 1.0.Foundation soil Poisson's ratio ν=0.49, elastic modulus E=100MPa；
Pile body uses elastic model, Poisson's ratio ν=0.15, elastic modulus E=20GPa.Undrained strength uses mole coulomb pattern die
Quasi-, angle of friction is taken as 0 ° (mole coulomb model degradation is Tresca model).Two models apply identical vertical displacement 0.01m.
Claims (6)
1. a kind of novel earthquake-proof basis based on root system bionic, which is characterized in that pile body part and root system including pile foundation are imitative
Raw structure；The root system bionic structure design should be as follows:
(1) vertical pile body is selected, note pile body length is L；
(2) multilayer taper pile root structure is being designed along the direction pile body length L, every layer of taper pile root system establishes the stake in pile foundation
The upper surface of body (2), is connected with vertical pile body, and every layer of taper pile root system designs one from water on four orthogonal directions of horizontal plane
Plane starts taper pile obliquely；The taper pile Root Distribution of different layers is on different horizontal planes along the direction pile body length L；Often
A taper pile is fixed together on the respectively described horizontal plane with the side of vertical pile body, is extended along taper pile length direction
Extension line is sent to the diametral antipodal point of vertical pile body top surface, and the diametral antipodal point is: the extension that note extends along taper pile length direction
Line intersects with a diameter of vertical pile body top surface, and intersection point is denoted as O, and the extension line that taper pile length direction extends is on vertical pile body top
Face is projected as the diameter that a diameter endpoint is above-mentioned intersection point O, and the fixed connection point of the taper pile and vertical pile body is denoted as
Fixed intersection point, the fixation intersection point of every layer of taper pile root system are distributed on four orthogonal directions of same level；I.e. taper pile end with
The distance of fixed intersection point=n times of fixed the distance between intersection point and intersection point O；It is oblique that every layer of taper pile root system more leans on Vertical Pile to hold with it
The value of stake n is bigger, and the value range of n is 1 to 5；
The diameter of taper pile is vertical pile body diameter 1/5th to half.
2. a kind of novel earthquake-proof basis based on root system bionic described in accordance with the claim 1, which is characterized in that each Vertical Pile
Body and each taper pile are equipped with the reinforcing bar that at least one corresponds to length direction；The reinforcing bar of the reinforcing bar of each taper pile and vertical pile body connects
It is connected together.
3. a kind of novel earthquake-proof basis based on root system bionic described in accordance with the claim 1, which is characterized in that the root system
Biomimetic features can have different root system bionic structure design sides according under different hydrogeologic conditions and the delamination of soil
Case, by adjusting root structure in the position of pile body, sectional dimension and length.
4. a kind of novel earthquake-proof basis based on root system bionic described in accordance with the claim 1, which is characterized in that the number of vertical stake
Amount is one or more.
5. a kind of novel earthquake-proof basis based on root system bionic described in accordance with the claim 1, which is characterized in that the number of vertical stake
Measuring multiple is 4-8.
6. a kind of described in any item novel earthquake-proof basis Specific construction processes based on root system bionic of claim 1-5, special
Sign is, comprising the following steps:
(1) pile body is excavated according to design specification and requirement；
(2) using drill bit or pumping indigenous equipment at stake well head, according to specific root system bionic structural design scheme, in different angle
It spuds in or is realized with pumping local method；
(3) reinforcing bar needed for placing pile body and root system bionic structure.
(4) casting concrete；
(5) model foundation on clump of piles root system bionic basis therewith similarly, specific pilespacing need to by specific hydrogeologic condition and
The delamination of soil determines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910747418.1A CN110528556B (en) | 2019-08-13 | 2019-08-13 | Foundation based on root system bionics and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910747418.1A CN110528556B (en) | 2019-08-13 | 2019-08-13 | Foundation based on root system bionics and construction method |
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| Publication Number | Publication Date |
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| CN110528556A true CN110528556A (en) | 2019-12-03 |
| CN110528556B CN110528556B (en) | 2021-06-04 |
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| CN203559412U (en) * | 2013-10-22 | 2014-04-23 | 绍兴文理学院 | Anti-sidesway large-diameter composite cast-in-place concrete pile |
| CN104060625A (en) * | 2014-06-11 | 2014-09-24 | 河海大学 | Offshore wind power foundation adopting steel rods for connecting vertical pile and inclined piles |
| CN104404949A (en) * | 2014-10-20 | 2015-03-11 | 国家电网公司 | Root-shaped filling pile |
| JP2015101952A (en) * | 2013-11-20 | 2015-06-04 | 正樹 宮腰 | Rooting pile |
| CN106968245A (en) * | 2017-05-18 | 2017-07-21 | 重庆科技学院 | The uplift pile of prestress anchorage cable manually digging hole and its construction method |
| CN207079614U (en) * | 2017-07-03 | 2018-03-09 | 深圳市孺子牛建设工程有限公司 | A kind of building pile structure |
| CN109487811A (en) * | 2018-12-18 | 2019-03-19 | 温州电力设计有限公司 | A kind of lateral tree root caisson and its installation equipment |
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2019
- 2019-08-13 CN CN201910747418.1A patent/CN110528556B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007056479A (en) * | 2005-08-23 | 2007-03-08 | Yasuhiro Fujita | Slope only for rooting pile, and perpendicular double-driving switching rooting bar driving machine |
| CN103205965A (en) * | 2013-04-28 | 2013-07-17 | 何春林 | Root pressure grouting pile and construction method thereof |
| CN203559412U (en) * | 2013-10-22 | 2014-04-23 | 绍兴文理学院 | Anti-sidesway large-diameter composite cast-in-place concrete pile |
| JP2015101952A (en) * | 2013-11-20 | 2015-06-04 | 正樹 宮腰 | Rooting pile |
| CN104060625A (en) * | 2014-06-11 | 2014-09-24 | 河海大学 | Offshore wind power foundation adopting steel rods for connecting vertical pile and inclined piles |
| CN104404949A (en) * | 2014-10-20 | 2015-03-11 | 国家电网公司 | Root-shaped filling pile |
| CN106968245A (en) * | 2017-05-18 | 2017-07-21 | 重庆科技学院 | The uplift pile of prestress anchorage cable manually digging hole and its construction method |
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| CN109487811A (en) * | 2018-12-18 | 2019-03-19 | 温州电力设计有限公司 | A kind of lateral tree root caisson and its installation equipment |
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| CN110528556B (en) | 2021-06-04 |
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