阅读说明：本技术 一种基于根系仿生的新型基础及施工方法 (A kind of novel foundation and construction method based on root system bionic ) 是由 刘羿 陈美琳 韦石兰 陈适才 于 2019-08-13 设计创作，主要内容包括：一种基于根系仿生的新型基础及施工方法,属于基础工程抗震领域。要解决传统桩基础在地震中存在的单桩下沉、桩帽与承台连接失效、随土体侧移破坏等问题。目前国内外关于仿生抗震结构的创新仅限于上部结构,尚没有对根系仿生基础的相关研究,更没有相关理论公式、实验及仿真数据。通过仿生技术,可以改进建筑基础的结构设计、加强相关方面的研究与设计。本发明通过在桩基础的特定位置设置不同方向、长度的根系仿生结构来离散基桩的受力部位分布,实现多传力路径。相对于桩基础具有更好的鲁棒性,可以很好解决深基础在强震中的破坏。(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.)

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.

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.