CN208219678U

CN208219678U - A kind of TGXG with auxetic effect

Info

Publication number: CN208219678U
Application number: CN201820790715.5U
Authority: CN
Inventors: 苏俊伟; 崔新壮; 卢途; 王忠啸; 崔社强; 张磊; 王洁茹; 李骏; 王艺霖
Original assignee: Shenzhen Research Institute Of Shandong University; Shandong University
Current assignee: Shenzhen Research Institute Of Shandong University; Shandong University
Priority date: 2018-05-25
Filing date: 2018-05-25
Publication date: 2018-12-11
Anticipated expiration: 2028-05-25

Abstract

The utility model discloses a kind of TGXG with auxetic effect, it solves the problems, such as that Reinforced Material with Clay Engineering fails because caused by being extracted muscle material in the prior art, has the effect of forming auxetic effect, the interaction for improving muscle material and filler, grid is effectively avoided to extract phenomenon from the soil body because bite force reduces；Its technical solution are as follows: including several assembled rigid units, each assembled rigid unit is made of sheath body and sandwich, and the two has the bulge-structure being mutually twisted；The sandwich and sheath body are made of the unit bodies of tandem array respectively, and the cohesive position of sandwich cell cube and sheath body cell cube cohesive position interlaced arrangement；After by pulling force, the bulge-structure being mutually twisted is relatively moved, and sheath body is risen by inner clamps stud, and thickness increases, and guarantees to remain auxetic effect in soil body range of strain by bulge-structure.

Description

A kind of TGXG with auxetic effect

Technical field

The utility model relates to field of civil engineering more particularly to a kind of TGXG with auxetic effect.

Background technique

In recent years, with the Large scale construction of China's infrastructure, extend in particular with traffic network to mountain area, it is tall and big Earth structure (being highly more than tall and big barricade and the roadbed etc. of 20m) is more and more.Traffic load and natural cause (it is meteorological, The hydrology, geology, earthquake etc.) under the action of, the disasters such as tall and big earth structure deformation, cracking even collapse happen occasionally, and give people People's lives and properties bring heavy losses.

Research finds the increase with the depth of fill (burden pressure), and the increasing degree of shear stress reduces between muscle soil, when It bankets when increasing to certain altitude, the shear stress between muscle soil increases unobvious, illustrates tall and big earth structure depth layers of reinforcement material Coefficient of friction than shallow-layer than reduce very much, increase the risk that muscle material is pulled out.There is above-mentioned phenomenon and is primarily due to tradition TGXG belongs to positive Poisson ratio material, and when grid receives stretching action, grid is shunk in thickness direction, causes muscle- Filler at Soil Interface cuts contracting.

In existing research, in order to improve the mechanical property of reinforced earth, people change often through material intensity itself is improved The stability of kind earthfill structure, and ignore the ceramic-metal bond action characteristic having a major impact to Reinforced Material with Clay Engineering deformation and intensity Improvement, this improved method for solve the problems, such as muscle material extract caused by Reinforced Material with Clay Engineering failure effect it is little.

Therefore, it is urgently to be resolved main in the design of tall and big earth structure for how improving muscle-Soil Interface mechanical property One of problem.

Utility model content

A kind of TGXG with auxetic effect that in order to overcome the deficiencies of the prior art, the utility model provides, With forming auxetic effect, the interaction for improving muscle material and filler, effectively avoid grid due to bite force reduces from the soil body The middle effect for extracting phenomenon.

The utility model adopts the following technical solutions:

A kind of TGXG with auxetic effect, including several assembled rigid units, each assembled rigid unit is by sheath body and sandwich It constitutes, the two has the bulge-structure being mutually twisted；

The sandwich and sheath body are made of the unit bodies of tandem array respectively, and the cohesive position and sheath body of sandwich cell cube Cell cube cohesive position interlaced arrangement；After by pulling force, the bulge-structure being mutually twisted is relatively moved, and sheath body is by internal sandwich It props up, thickness increases, and guarantees to remain auxetic effect in soil body range of strain by bulge-structure.

Further, the bulge-structure of the sandwich can be sawtooth projection or circular protrusions, sheath body internal protrusion knot Structure is adapted with the bulge-structure of sandwich.

Further, the integral thickness h of the assembled rigid unit is 6-8mm, the bulge-structure highest point thickness h of sandwich₁For 4-5mm, minimum point thickness h₂For 2-3mm.

Further, the thickness b of the sheath body₂Less than the thickness h of sandwich bulge-structure minimum point₂。

Further, the assembled rigid unit is in cross-shaped configuration.

Further, the sheath body is wrapped in the two sides up and down of sandwich, and integral by pouring mode shape.

The preparation method of TGXG with auxetic effect, comprising the following steps:

Step (1) determines the form and size of sandwich bulge-structure；

Step (2) produces sandwich, sheath body in batches respectively, sandwich is spliced into the grille-like of sets requirement, in sandwich Upper and lower two sides are covered each by sheath body, and by material pours or weld in the way of sandwich and sheath body package is integral.

Further, in the step (1), the maximum deformation quantity of application environment is estimated first, is then determined according to test The form and size of sandwich bulge-structure.

Further, in the step (2), the material is the high molecular polymers such as polypropylene, high density polyethylene (HDPE).

Further, in the step (2), the sandwich, sheath body are made by TGXG production equipment.

Compared with prior art, the utility model has the beneficial effects that

(1) sandwich of the utility model have bulge-structure, make grid when being stretched effect in the thickness direction thereof The mutual dislocation of protrusion occurs, dislocation causes grid to increase in thickness, forms a kind of TGXG with auxetic effect, the soil The auxetic effect of work grid improves the interaction of muscle material and filler；

(2) when the depth of fill (burden pressure) increases, the interlock action between muscle soil increases or protects the utility model It holds constant so that cell structure has stronger physics and mechanical characteristic；Appearance with auxetic effect TGXG not only has There are important theory innovation value and engineering significance, and the research achievement has broad application prospects.

Detailed description of the invention

The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.

Fig. 1 is one concatenation unit main view of the embodiments of the present invention；

Fig. 2 is one concatenation unit top view of the embodiments of the present invention；

Fig. 3 is two concatenation unit main view of the embodiments of the present invention；

Fig. 4 is three concatenation unit main view of the embodiments of the present invention；

Fig. 5 is four concatenation unit main view of the embodiments of the present invention；

Wherein, 1- sheath body, 2- sandwich.

Specific embodiment

It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field The identical meanings of understanding.

It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.

As background technique is introduced, exist in the prior art what the Reinforced Material with Clay Engineering because caused by being extracted muscle material failed Deficiency, in order to solve technical problem as above, present applicant proposes a kind of TGXG with auxetic effect.

Embodiment one:

As Figure 1-Figure 2, a kind of TGXG with auxetic effect is provided, by several single in cross assembly Member is spliced, and each assembled rigid unit is made of sheath body 1 and sandwich 2, and the two sides up and down of sandwich 2 are wrapped up by sheath body 1.

The sandwich 2 is made of the unit bodies of tandem array, and each cell cube is in the bulge-structure that both ends are vertebra platform, and Both ends frustum is asymmetric.

There is bulge-structure compatible with sandwich 2, the two bulge-structure is mutually twisted on the inside of the sheath body 1；Sandwich 2 is single The cohesive position and 1 cell cube cohesive position interlaced arrangement of sheath body of first body.

The 1 thickness b of sheath body₂Less than internal 2 thickness h of sandwich₂。

After under tension, grid generates displacement along its direction of pull, since 1 thickness of sheath body is less than 2 thickness of sandwich, sheath body After 1 is easier to that deformation occurs, therefore grid generates displacement along its direction of pull, opposite move occurs for the bulge-structure being mutually twisted It is dynamic, prop up sheath body 1 by its internal 2 bulge-structure of sandwich, thickness increases, and can guarantee grid by rationally designing bump sizes It is able to maintain auxetic effect always in soil body range of strain.

The expansion energy that grid generates during tension increases the interlocking of muscle soil, so that ceramic-metal bond is like friction Number increases；Meanwhile the passive resistance of grid rib is also increased, to enhance the stability of tall and big earth structure.

It is greatly influenced since grid sandwich construction has the dilatancy that its tension generates, thus is carrying out 2 knot of sandwich Structure should comprehensively consider when choosing.

As shown in Figure 1, the integral thickness h of concatenation unit is 6-8mm, the highest point thickness h of the bulge-structure of sandwich 2₁For 4-5mm, minimum point thickness h₂For 2-3mm；Each unit body length is 12-13mm (i.e. a in Fig. 1₁、a₂Overall length).

Each concatenation unit total length a is 120-130mm；The width b of concatenation unit is 22-26mm, covers thickness of the shell b₂For 1-2mm, sandwich width b₁For 20-22mm.

Step (1) estimates the maximum deformation quantity of application environment first, then determines 2 bulge-structure of sandwich according to tension test Form and size；

Step (2) produces sandwich 2, sheath body 1 in batches using TGXG production equipment respectively, and sandwich 2 is spliced into setting It is required that grille-like, be covered each by sheath body 1 in the two sides up and down of sandwich 2, and using pouring polypropylene, high density polyethylene (HDPE) etc. Macromolecule polymer material or the mode of welding wrap up sandwich 2 with sheath body 1 integral.

The application in the engineering for needing reinforced structure can be used the type auxetic type TGXG, such as build highway, The protection works such as railway and the reinforced soil retaining wall on rivers,lakes and seas bank, dykes and dams, bridge floor, abrupt slope, mine engineering.

Embodiment two:

As shown in figure 3, the sandwich indention bulge-structure, zigzag sandwich work as lattice compared with other types structure The auxetic effect that generates in a certain range of grid strain is the most obvious, but strains thickness direction can then occur when being more than certain numerical value Anticlimax.

It requires apparent engineering that zigzag sandwich can be used auxetic effect, but the strain along grid transverse direction should be avoided Greatly.

The integral thickness h of concatenation unit is 6-8mm, the highest point thickness h of the bulge-structure of sandwich₁For 4-5mm, minimum point Thickness h₂For 2-3mm；Each unit body length is 12-13mm.

Other structures are the same as example 1, and details are not described herein again.

Embodiment three:

As shown in figure 4, the rounded bulge-structure of the cell cube of the laminboard layer, circular protrusions structure after under tension its Thickness increases rate and more mitigates, and the anticlimax of thickness direction will not then occur when strain is more than certain numerical value, but its auxetic is imitated It should be relatively small compared with the protrusion of other forms.

Example IV:

As shown in figure 5, the sandwich is in long sawtooth projection structure, and when raised lateral length is longer, the auxetic of grid Effect is unobvious, but can guarantee and all occur thickness increase or constant under moderate finite deformation.

The integral thickness h of concatenation unit is 6-8mm, the highest point thickness h of the bulge-structure of sandwich₁For 4-5mm, minimum point Thickness h₂For 2-3mm；Each unit body length is 24-26mm.

Furthermore, it is also possible to occur to keep grid shell and sandwich rationally too small because the raised gradient is too small, make sandwich easily It is pulled out.

Embodiment five:

For the TGXG used in the slope project, TGXG is mainly used for soil mass consolidation, prevents Slope Sliding.

To prepare the auxetic type TGXG for being suitable for side slope, firstly, the maximum transversal deflection of estimation side slope, according to examination Test the form and size of sandwich protrusion inside determining auxetic type TGXG.

Then, it is produced and is made through techniques such as component production, node assembly using TGXG production equipment, by auxetic type soil Work grid is laid in side slope.

After grid under tension, grid generates displacement along its direction of pull；It is small due to covering thickness of the shell in the design process In internal sandwich thickness, after sheath body is easier to that deformation occurs, therefore grid generates displacement along its direction of pull, what is be mutually twisted is convex It plays construction to relatively move, props up exterior sleeves by internal protrusion, thickness increases, to generate negative poisson's ratio structure effect It answers, on the one hand node expansion increases the bite force of muscle soil, soil body lateral displacement resistance is on the other hand increased, to effectively avoid Grid extracts phenomenon because bite force reduces from the soil body, substantially increases Side Slope Safety Coefficient.

The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.

Claims

1. a kind of TGXG with auxetic effect, which is characterized in that including several assembled rigid units, each assembled rigid unit is by covering Shell and sandwich are constituted, and the two has the bulge-structure being mutually twisted；

The sandwich and sheath body are made of the unit bodies of tandem array respectively, and the cohesive position of sandwich cell cube and set shell unit Body cohesive position interlaced arrangement；After by pulling force, the bulge-structure being mutually twisted is relatively moved, and sheath body is by inner clamps stud It rises, thickness increases, and guarantees to remain auxetic effect in soil body range of strain by bulge-structure.

2. a kind of TGXG with auxetic effect according to claim 1, which is characterized in that the protrusion of the sandwich Structure can be sawtooth projection or circular protrusions, and sheath body internal protrusion structure is adapted with the bulge-structure of sandwich.

3. a kind of TGXG with auxetic effect according to claim 1 or 2, which is characterized in that described assembled single The integral thickness h of member is 6-8mm, the bulge-structure highest point thickness h of sandwich₁For 4-5mm, minimum point thickness h₂For 2-3mm.

4. a kind of TGXG with auxetic effect according to claim 3, which is characterized in that the thickness of the sheath body b₂Less than the thickness h of sandwich bulge-structure minimum point₂。

5. a kind of TGXG with auxetic effect according to claim 1, which is characterized in that the assembled rigid unit is in Cross-shaped configuration.

6. a kind of TGXG with auxetic effect according to claim 1, which is characterized in that the sheath body is wrapped in The two sides up and down of sandwich, and it is integral by pouring mode shape.