CN108285569A - A kind of build-in type is from perception TGXG structure and method - Google Patents
A kind of build-in type is from perception TGXG structure and method Download PDFInfo
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- CN108285569A CN108285569A CN201810220815.9A CN201810220815A CN108285569A CN 108285569 A CN108285569 A CN 108285569A CN 201810220815 A CN201810220815 A CN 201810220815A CN 108285569 A CN108285569 A CN 108285569A
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/001—Conductive additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention discloses a kind of build-in types from perception TGXG structure and method, it solves the problems, such as that Important Project casualty accident exists in the prior art, and has the advantageous effect that can realize On-Line Dynamic Monitoring and safe early warning to reinforced earth body, scheme as follows：A kind of build-in type is from perception TGXG structure, including at least one row by adding the first rib for thering is the polymer of conductive filler to constitute and at least two rows of the second ribs for being internally provided with the thermoplastic polymer sheets item of conducting wire and constituting, second rib is staggered with first rib and constitutes the structure of multiple rows of second rib and an at least row first rib, and staggered place is connected using lock, the conducting wire of second rib contacts setting with first rib, and wherein two respective wires that ranked second rib interlocked with same first rib are connect with resistance detection equipment.
Description
Technical field
The present invention relates to field of civil engineering, and TGXG structure and method are perceived certainly more particularly to a kind of build-in type.
Background technology
In recent years, with the Large scale construction of the infrastructure such as China's water conservancy and traffic, in particular with traffic network to
The extension in mountain area, tall and big earth structure (being highly more than tall and big barricade and the roadbed etc. of 20m) are more and more.Environmental attack,
Under the couplings of disaster factors such as the long-term effect of material aging and load, fatigue effect and mutation effect, tall and big reinforced earth
Malformation, the cracking disasters that even collapse etc. happen occasionally, and heavy losses are brought to people's lives and properties.In order to reduce disaster
Occur, in the design of tall and big earth structure, engineers and technicians often use TGXG to carry out reinforcement consolidation to the soil body
Processing, but still the generation of some Important Project casualty accidents can not be avoided.To realize that the stress to tall and big earth structure is supervised
Control and overload protection, domestic and foreign scholars have developed the TGXG with sensing characteristics, can change its stress and be converted into
Electric signal is simultaneously exported.
However, existing sensing type TGXG is often to reduce the intensity of its own as cost, by into polyethylene
It adds a large amount of carbon blacks and obtains certain electric conductivity, lead to that its tensile strength is low, toughness is low, sensitivity is low and cyclic load
The repeatability of lower sensing capabilities is poor, cannot be satisfied the needs of Practical Project.
Therefore, it is necessary to carry out new research and design from perception TGXG structure to a kind of build-in type.
Invention content
For overcome the deficiencies in the prior art, the present invention provides a kind of build-in types to perceive TGXG structure, the soil certainly
Work grid and soil body build-in, interlocking are stronger, have high specific strength, high ratio modulus, corrosion-resistant, endurance, creep resistant, compared with
Sensitive self-sensing properties, it is repeatable compared with stable strain-resistance the advantages that, you can as structural material bearing load, again
It can be used as functional material to play a role, to make repair in time.
A kind of concrete scheme of build-in type from perception TGXG structure is as follows：
A kind of build-in type is from perception TGXG structure, including at least one row have the polymer of conductive filler to constitute by adding
The second rib that first rib and at least two rows of thermoplastic polymer sheets items for being internally provided with conducting wire are constituted, the second rib interlock with first rib
The structure for constituting multiple rows of second rib and an at least row first rib is set, and staggered place is connected using lock, the conducting wire of the second rib with
First rib contact setting, wherein two respective wires that ranked second rib interlocked with same first rib are connect with resistance detection equipment.
In above-mentioned TGXG structure, the first rib electric elements that perceptually soil structures change, the second rib is used as and adopts
Collect the circuit element of electric signal, latching has as the connecting element of consolidation first rib, the second rib by using polymer slip
The service life that effect improves TGXG passes through the measuring point of first rib and the second rib junction when TGXG deforms
Detect the resistance variations of first rib, you can realize the On-Line Dynamic Monitoring and safe early warning to reinforced earth body in life cycle management.
Further, in order to ensure the consistency of each concatenation unit mechanics parameter in TGXG, the first rib material
Including chopped carbon fiber, carbon fiber powder, superconductive carbon black, graphite, silane coupling agent, titanate coupling agent, poly- the third rubber of second of ternary
Glue (EPDM), polyethylene and polypropylene.
Further, the second timber material includes carbon black, polyethylene, polypropylene, the poly- EP rubbers of ternary；The thermoplastic
The open slot for conducting wire to be arranged is carved in property polymer slip.
Further, the different height setting of conducting wire in multiple rows of second rib；
Alternatively, first rib is longitudinally disposed, the second rib is laterally arranged, and the second rib of staggered place is set to first rib surface.
Further, the material of the lock includes carbon black, polyethylene, polypropylene and the poly- EP rubbers of ternary；Second rib,
In first rib and lock, polyethylene, polypropylene are all made of as the two-component polymer system of matrix, and mix the solubilising of set amount
Agent EPDM is come the compatibility that both improves；Such polymeric system：On the one hand, there is excellent mechanical characteristic and durability, gram
Take that polyethylene intensity is low, disadvantage of polypropylene resistance to ag(e)ing difference；On the other hand, it is applied to the first rib with self-sensing properties
In, double percolation conduction network structures can be formed, the percolation threshold of system can be effectively reduced, achieve the purpose that reduce resistivity.
Alternatively, the lock is connect with one end of bar strip with second rib or first rib connecting side, bar strip
The other end lacing wire hoop is set, lacing wire hoop is arranged around first rib or the second rib, and lacing wire hoop is vertical with first rib or the second rib
Setting can avoid the separation of first rib and the second rib, lacing wire hoop is with lacing wire item with lock by the setting of lacing wire hoop and lacing wire item
It is molded together.
Further, the mass fraction accounting of each material is as follows in the first rib：Polyethylene is 45%~54%, poly- third
Alkene is 15%~18%；Chopped carbon fiber is 2%~4%, carbon fiber powder 4%~8%, and superconductive carbon black is 4%~6%；Stone
Ink is 2%~5%, and silane coupling agent is 5%~10%, and titanate coupling agent is 5%~10%；The poly- EP rubbers of ternary is
6%~12%.
Wherein, as the filler of conductive polymer composite, in order to improve first rib conductive filler in forming process
Contact probability, chopped carbon fiber be long 1mm, diameter 7um filamentous, have lightweight, high-strength, Gao Mo, corrosion-resistant, electric conductivity
Exsertile advantage；Carbon fiber powder is carbon fiber after special technique surface treatment, technique grinding, micro- examination, high temperature drying
Particle is obtained, appearance is length 30-50um, and the cuboid of diameter 7um, electric conductivity is good, and shape is tiny, surface is pure,
Large specific surface area is easy to evenly dispersed by resin infiltration, is the composite material filler of function admirable；Superconductive carbon black is in microcosmic knot
Granularity is 33nm in structure, and large specific surface area, electric conductivity is excellent；The micro-shape of graphite is approximately the spherical particle of 6-10um,
With good chemical stability, wearability, electric conductivity.
Conductive polymer composite has typical percolation phenomena, i.e., when the volume of conductive phase is less than a critical value
When, the resistivity of composite material changes unobvious with the increase of conductive phase volume；It is multiple when the volume of conductive phase is close to critical value
The resistivity of condensation material is reduced rapidly with the increase of conductive phase, can reduce several orders of magnitude, and critical value at this time is known as oozing
Filter threshold value；But when conductive phase volume continues to increase more than percolation threshold, resistivity continues slack-off again with the variation of volume.Have
It closes studies have shown that the diafiltration section of different conductive phases is different, since the size and shape of conductive phase causes conductive phase to be formed
The volume needed when conductive network is different.In the present invention in first rib material, four kinds of conductive phases are mixed into use again, utilize difference
Different size and shape features possessed by conductive phase make the functional polymer prepared while having to use single conductive phase system
Possessed advantage when standby, while the synergistic effect between conductive filler advantageously forms stable conductive network, reduces diafiltration threshold
Volume needed for value.The chopped carbon fiber of threadiness forms conductive network, provides remote conductive by the mutual overlap joint of itself；
Granular carbon fiber powder, superconductive carbon black, graphite, it is conductive not only to provide short range, but also by " bridge joint " of conductive particle effect,
The contact between chopped carbon fiber can be activated, the increase of Electrical Conductivity of Composites is caused, to improve conducting polymer composite wood
Expect the sensibility and stability of strain-resistance.
In addition, texture is arranged in the lock inner surface, and it is provided with groove, increased and the build-in of the soil body, interlocking.
A kind of build-in type perceives the preparation method of TGXG structure certainly, includes the following steps：
1) first rib and the second rib are prepared respectively；
2) splicing is carried out with the second rib to first rib to connect.
Further, the preparation process of the first rib is as follows：
1-1) using chopped carbon fiber, carbon fiber powder, superconductive carbon black and graphite as conductive filler, and by setting quality point
Number after mixing, mixture is placed in the mixed acid of the concentrated sulfuric acid/concentrated nitric acid, and industrial alcohol is added, at a set temperature
Handle setting time；
1-2) with setting volume clear water dilution step 1) obtain mixed liquor, microfiltration film vacuum filtration, it is repeatedly more
Secondary dilution is filtered to filtrate into neutrality, is dried for standby under set temperature；
1-3) by conductive filler and the silane coupling agent, titanate coupling agent, the poly- EP rubbers of ternary, poly- after acidification
Ethylene, polypropylene are placed in high-speed mixer and are uniformly mixed；
Uniform mixture 1-4) is placed in progress repeated processing granulation in double screw extruder；
1-5) pellet input injection molding machine is melted, is molded into the conducting polymer slip of required size；
The size for 1-6) pressing required TGXG at interval of one layer of conductive silver glue of smearing at equal position, and attaches copper
Foil conductive tape smears conductive silver glue, it can be ensured that the two is complete always between polymer slip and copper foil formula conductive tape
Contact, forms good conductive coating, copper foil formula conductive tape is attached on conducting polymer slip surface, to form electrode.
Further, the preparation process of second rib is as follows：
2-1) carbon black, polyethylene, polypropylene, the poly- EP rubbers of ternary are molded according to setting mass fraction through melt blending
At the slip of required size；Mass fraction wherein shared by polyethylene is 65%~75%, and the mass fraction shared by polypropylene is
15%~25%, the shared mass fraction of the poly- EP rubbers of ternary is 4%~7%, the mass fraction shared by carbon black is 3%~
6%；
2-2) go out inner conductors path in rack surface telltale mark；
2-3) with gaining machine by the thread guide path cutting of label, it is desirable that groove depth is 2-4 times of diameter of wire, and groove depth is small
In equal to the 1/3 of the second rib thickness；
2-4) conducting wire and copper circuit measuring point are welded in rear embedded groove, and instills glue and fixes；
2-5) thermoplastic machine is used to fill slot to seal, wherein copper circuit measuring point is exposed；
Conductive silver glue, and copper foil formula conductive tape in posting in time 2-6) are uniformly smeared around copper circuit measuring point.
Further, the step 2) is as follows：
3-1) by carbon black, polyethylene, polypropylene and the poly- EP rubbers of ternary, (mass fraction wherein shared by polyethylene is
65%~75%, the mass fraction shared by polypropylene is 15%~25%, and the shared mass fraction of the poly- EP rubbers of ternary is 4%
~7%, the mass fraction shared by carbon black is 3%~6%) that the melting of thermoplastic machine is added is spare；
3-2) one layer of conductive silver glue is coated in first rib and the second rib, and copper-foil conducting electricity is set in the two staggered place, by the
With connection circuit, blend compounds water carries out consolidation process early period for the copper-foil conducting electricity splicing alignment of one rib, the second rib；
It 3-3) adopts and sealing water-proofing treatment is done to the stitching portion of first rib, the second rib；
Later stage consolidation process 3-4) is carried out to first rib, the second rib stitching portion using thermoplastic machine, thermoplastic lock is formed, completes
Splicing.
Compared with prior art, the beneficial effects of the invention are as follows：
1) structure of the invention has high specific strength, high ratio modulus, corrosion-resistant, endurance, creep resistant, relatively sensitive perception certainly
Characteristic, it is repeatable compared with stable strain-resistance the advantages that.
2) present invention passes through the detection to first rib resistance, you can realizes and is moved to the online of reinforced earth body in life cycle management
State monitors and safe early warning.
3) setting that the present invention passes through bar strip and lacing wire hoop, it is ensured that the compactness that first rib is connect with the second rib.
Description of the drawings
The accompanying drawings which form a part of this application are used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation do not constitute the improper restriction to the application for explaining the application.
Fig. 1 is a kind of build-in type perception TGXG appearance diagram certainly；
Fig. 2 is a kind of build-in type perception TGXG structure first rib schematic diagram certainly；
Fig. 3 is a kind of build-in type perception TGXG structure the second rib schematic diagram certainly；
Fig. 4 is that a kind of build-in type latches schematic diagram from perception TGXG structure；
Fig. 5 is a kind of build-in type perception TGXG structure partial circuit diagram certainly；
In figure：1- first ribs, the second ribs of 2-, 3- thermoplastics lock, 4- Integration Bus, 5- copper foil formula conductive tapes, 6- electrodes
Measuring point, copper wires built in 7-, the centers 8- lock, 9- bar strips, 10- lacing wire hoops, 11- circuit leads.
Specific implementation mode
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 implementation mode, 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 singulative
It is also 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 combination thereof.
As background technology is introduced, the deficiencies in the prior art, in order to solve technical problem as above, this Shen
A kind of build-in type please be propose from perception TGXG structure.
In a kind of typical embodiment of the application, as depicted in figs. 1 and 2, a kind of build-in type is from perceiving TGXG
Structure, including at least one row are by adding the first rib for having the polymer of conductive filler to constitute and at least two rows of heat for being internally provided with conducting wire
The second rib that thermoplastic polymer slip is constituted, the second rib are staggered with first rib and constitute multiple rows of second rib and an at least row first
The structure of rib, and staggered place is connected using lock, the conducting wire of the second rib contacts setting with first rib, interlocks with same first rib
Wherein two respective wires that ranked second rib are connect with resistance detection equipment, and TGXG structure forms multiple rows of multiple row structure.
In above-mentioned TGXG structure, the first rib electric elements that perceptually soil structures change, the second rib is used as and adopts
Collect the circuit element of electric signal, latches the connecting element as consolidation first rib, the second rib, pass through conducting wire and resistance detection equipment
Connection is realized to the On-Line Dynamic Monitoring of reinforced earth body by the variation of first rib resistance, effectively reduces the complexity of circuit,
Form the circuit simply easily surveyed.
In order to ensure the consistency of each concatenation unit mechanics parameter in TGXG, first rib material includes the carbon fiber that is chopped
The poly- EP rubbers of dimension, carbon fiber powder, superconductive carbon black, graphite, silane coupling agent, titanate coupling agent, ternary (EPDM), poly- second
Alkene and polypropylene.
Second timber material includes carbon black, polyethylene, polypropylene, the poly- EP rubbers of ternary；It is carved in thermoplastic polymer sheets item
It is useful for the open slot of setting conducting wire.The different height setting of conducting wire in multiple rows of second rib, and multiple conducting wires are in end side shape
At Integration Bus.
The material of lock includes carbon black, polyethylene, polypropylene and the poly- EP rubbers of ternary；Second rib, first rib and lock
In, polyethylene, polypropylene are all made of as the two-component polymer system of matrix, and mix the solubilizer EPDM of set amount to improve
The compatibility of the two；Such polymeric system：On the one hand, there is excellent mechanical characteristic and durability, it is strong to overcome polyethylene
Spend the disadvantage of low polypropylene resistance to ag(e)ing difference；On the other hand, it is applied in the first rib with self-sensing properties, can be formed
Double percolation conduction network structures can effectively reduce the percolation threshold of system, achieve the purpose that reduce resistivity.
Lock is connect with one end of bar strip with second rib or first rib connecting side, and the other end of bar strip is set
The lacing wire hoop that same bar strip is arranged in a mutually vertical manner is set, first rib is longitudinal rib, and the second rib is cross rib.Lock by the punching press of mold thermoplastic and
At, will the close lock tube of rib in length and breadth, coupling mechanism force is strong, good seal performance, itself is equipped with texture and circle for nubbed surface and surface
Groove increases and the build-in of the soil body, interlocking；Bar strip is seamlessly connected with center lock, by super glue and vertical second
Rib is bonded as entirety, can prevent the sliding of lock；Lacing wire hoop is seamlessly connected with bar strip, is bonded by super glue and vertical second rib
For entirety, the loosening of bar strip can be prevented.
The mass fraction accounting of each material is as follows in first rib：Polyethylene be 45%~54%, polypropylene be 15%~
18%；Chopped carbon fiber is 2%~4%, carbon fiber powder 4%~8%, and superconductive carbon black is 4%~6%；Graphite be 2%~
5%, silane coupling agent is 5%~10%, and titanate coupling agent is 5%~10%；The poly- EP rubbers of ternary is 6%~12%.
A kind of build-in type perceives the preparation method of TGXG structure certainly, includes the following steps：
1) first rib and the second rib are prepared respectively；
2) splicing is carried out with the second rib to first rib to connect.
Further, the preparation process of the first rib is as follows：
1-1) using chopped carbon fiber, carbon fiber powder, superconductive carbon black and graphite as conductive filler, and by setting quality point
Number after mixing, mixture is placed in the mixed acid of the concentrated sulfuric acid/concentrated nitric acid, and industrial alcohol is added, is handled at 130 DEG C
4h；Wherein, the volume ratio of both the concentrated sulfuric acid/concentrated nitric acids is 3:1；
1-2) with the clear water dilution step 1 of setting volume) mixed liquor that obtains, the microfiltration membranes for being used in combination aperture to be 0.2um are true
Sky filters, and repeated multiple times dilution is filtered to filtrate into neutrality, is dried for standby at 100 DEG C；
1-3) by conductive filler and the silane coupling agent, titanate coupling agent, the poly- EP rubbers of ternary, poly- after acidification
Ethylene, polypropylene are placed in high-speed mixer and are uniformly mixed；
Uniform mixture 1-4) is placed in progress repeated processing granulation in double screw extruder；
1-5) pellet input injection molding machine is melted, is molded into the conducting polymer slip of required size；
The size for 1-6) pressing required TGXG smears one at interval of (namely rib staggered place in length and breadth) at equal position
Layer conductive silver glue, and attach copper foil formula conductive tape.
In above-mentioned preparation process, due in conductive filler each conductive phase particle surface it is different degrees of there are various polar groups
Group, such as：Hydroxyl, carboxyl, interior aliphatic radical etc., interparticle cohesive energy is very strong, and the aggregate surface product of particle is big in addition, in matrix material
Difficult dispersion, easily flocculation, influence the compatibility of conductive phase particle and basis material in material.Therefore, by step 1-2), step 1-3)
Setting, the former can be effectively increased the surface-active and specific surface area, surface roughness of conductive filler；The latter can be improved conduction and fill out
The compatibility of material and basis material.
Further, the preparation process of second rib is as follows：
2-1) carbon black, polyethylene, polypropylene, the poly- EP rubbers of ternary are molded according to setting mass fraction through melt blending
At the slip of required size；
2-2) go out inner conductors path in rack surface telltale mark, copper wires in the second rib is effectively avoided mutually to wind
And short circuit；
2-3) with gaining machine by the thread guide path cutting of label, it is desirable that groove depth is 2-4 times of diameter of wire, and groove depth is small
In equal to the 1/3 of the second rib thickness；
2-4) conducting wire and copper circuit measuring point are welded in rear embedded groove, and instills glue and fixes；
2-5) thermoplastic machine is used to fill slot to seal, wherein copper circuit measuring point is exposed；
Conductive silver glue, and copper foil formula conductive tape in posting in time 2-6) are uniformly smeared around copper circuit measuring point.
Further, the step 2) is as follows：
It is 3-1) that carbon black, polyethylene, polypropylene and the poly- EP rubbers addition thermoplastic machine melting of ternary is spare；
It 3-2) is coated with one layer of conductive silver glue in first rib and the second rib, by the copper-foil conducting electricity splicing pair of first rib, the second rib
Together with connection circuit, blend compounds water carries out consolidation process early period；
It 3-3) adopts and sealing water-proofing treatment is done to the stitching portion of first rib, the second rib；
Later stage consolidation process 3-4) is carried out to first rib, the second rib stitching portion using thermoplastic machine, thermoplastic lock is formed, completes
Splicing.
Build-in type is from the first rib electric elements that perceptually soil body changes in perception TGXG, and the second rib is as detection
The circuit element of resistance variations in first rib, as shown in Figure 5.Circuit lead in second rib A, B, C is connected to resistance instrument, i.e.,
The real time on-line monitoring to first rib working condition can be achieved.As circuit lead L1, L2, L3 monitor the resistance of first rib E in real time
Variation, lead L1, L2 observation circuit measuring point 1., 4. between resistance value, lead L2, L3 observation circuit measuring point 4., 7. between
Resistance value；Circuit lead M1, M2, M3 monitor the resistance variations of first rib F in real time, lead M1, M2 observation circuit measuring point 2., 5. it
Between resistance value, lead M2, M3 observation circuit measuring point 5., 8. between resistance value；Circuit lead N1, N2, N3 monitor in real time
The resistance variations of one rib G, lead N1, N2 observation circuit measuring point 3., 6. between resistance value, lead N2, N3 observation circuit measuring point
6., 9. between resistance value.
In order to detect strain-resistance sensibility of conducting polymer in first rib, 250g polyethylene is taken, 80g polypropylene,
15g chopped carbon fibers, 30g carbon fiber powders, 25g superconductive carbon blacks, 15g graphite, 25g silane coupling agents, the coupling of 25g titanate esters
Agent, the poly- EP rubbers melt blending of 35g ternarys is molded into dumbbell shape standard mechanics test specimen, in multigroup conducting polymer test specimen two ends
Addition electrode, which is placed on WDW-100 type universal testing machines, to be axially stretched, and direct current is used in combination in tensile speed 1mm/min
Hinder instrument synchro measure sample resistance.Collected data are handled, the stretching resistance relative change rate of sample is obtained and answers
The relationship of change, sensitivity coefficient are 1.956~2.432, mean value 2.184, than the foil resistance that common sensitivity is 2.000
Foil gauge effect will be got well, and measured tensile strength and reached 27.8MPa.
Build-in type TGXG is used for tall and big earth structure, it can be achieved that pre- to the real-time monitoring of reinforced earth body and safety
It is alert, reduce the generation of Important Project disaster.Strain-resistance characteristic of conducting polymer, that is, refer in elastic range, conducting polymer
The increased behavior in direct ratio with the increase of strain under stretching strain of the resistance of object.Utilize strain-resistance of conducting polymer
Characteristic can realize the real-time monitoring to grid working condition, i.e., realized to reinforced earth body by measuring the change in resistance of first rib
On-Line Dynamic Monitoring：
The relationship of change in resistance and deformation in first rib：
Δ R=k × Δ l (1)
Formula (1) is become into dimensionless correlation：
First rib line strain：
It brings formula (3) into formula (2), and carries out fortran and obtain：
In formula：Δ R is resistance change, R0The initial resistance value of first rib, k are a dimensionless constant, and Δ l extends for first rib
Amount, l are first rib initial length, and ε is the line strain of first rib.
Therefore, middle structure measures the initial resistance value of first rib and first rib elongation through this embodiment, to obtain first
The line strain of rib, to obtain the real-time monitoring of grid working condition.
The foregoing is merely the preferred embodiments of the application, are not intended to limit this application, for the skill of this field
For art personnel, the application can have various modifications and variations.Within the spirit and principles of this application, any made by repair
Change, equivalent replacement, improvement etc., should be included within the protection domain of the application.
Claims (10)
1. a kind of build-in type perceives TGXG structure certainly, which is characterized in that have the poly- of conductive filler by adding including at least one row
Close the first rib that object is constituted and the second rib that at least two rows of thermoplastic polymer sheets items for being internally provided with conducting wire are constituted, the second rib and
First rib, which is staggered, constitutes the structure of multiple rows of second rib and an at least row first rib, and staggered place is connected using lock, and second
The conducting wire of rib contacts setting with first rib, and wherein two to interlock with same first rib ranked second the respective wire and resistance detection of rib
Equipment connects.
2. a kind of build-in type according to claim 1 perceives TGXG structure certainly, which is characterized in that first timber
Material includes the poly- second of chopped carbon fiber, carbon fiber powder, superconductive carbon black, graphite, silane coupling agent, titanate coupling agent, ternary third
Rubber, polyethylene and polypropylene.
3. a kind of build-in type according to claim 2 perceives TGXG structure certainly, which is characterized in that the chopped carbon fiber
Dimension is the filamentous of long 1mm, diameter 7um, and carbon fiber powder is length 30-50um, the cuboid of diameter 7um.
4. a kind of build-in type according to claim 1 perceives TGXG structure certainly, which is characterized in that multiple rows of described second
The different height of conducting wire in rib is arranged, and the open slot for conducting wire to be arranged is carved in the thermoplastic polymer sheets item；
Alternatively, first rib is longitudinally disposed, the second rib is laterally arranged, and the second rib of staggered place is set to first rib surface.
5. a kind of build-in type according to claim 1 perceives TGXG structure certainly, which is characterized in that the material of the lock
Material includes carbon black, polyethylene, polypropylene and the poly- EP rubbers of ternary；
Alternatively, it is described lock connect with one end of bar strip with second rib or first rib connecting side, bar strip it is another
Lacing wire hoop is arranged in one end, and lacing wire hoop is arranged around first rib or the second rib.
6. a kind of build-in type according to claim 1 perceives TGXG structure certainly, which is characterized in that in the first rib
The mass fraction accounting of each material is as follows：Polyethylene is 45%~54%, and polypropylene is 15%~18%；Chopped carbon fiber is
2%~4%, carbon fiber powder 4%~8%, superconductive carbon black is 4%~6%；Graphite is 2%~5%, silane coupling agent 5%
~10%, titanate coupling agent is 5%~10%；The poly- EP rubbers of ternary is 6%~12%.
7. special according to a kind of any one of claim 1-6 preparation methods of oneself perception TGXG structure of build-in type
Sign is, includes the following steps：
1) first rib and the second rib are prepared respectively；
2) splicing is carried out with the second rib to first rib to connect.
8. preparation method according to claim 7, which is characterized in that the preparation process of the first rib is as follows：
1-1) using chopped carbon fiber, carbon fiber powder, superconductive carbon black and graphite as conductive filler, and it is mixed by setting mass fraction
After closing uniformly, mixture is placed in the mixed acid of the concentrated sulfuric acid/concentrated nitric acid, and industrial alcohol is added, is handled at a set temperature
Setting time；
1-2) with setting volume clear water dilution step 1) obtain mixed liquor, microfiltration film vacuum filtration, it is repeated multiple times dilute
Suction filtration is released to filtrate into neutrality, is dried for standby under set temperature；
1-3) by the conductive filler and silane coupling agent, titanate coupling agent, the poly- EP rubbers of ternary, poly- second after acidification
Alkene, polypropylene are placed in high-speed mixer and are uniformly mixed；
Uniform mixture 1-4) is placed in progress repeated processing granulation in double screw extruder；
1-5) pellet input injection molding machine is melted, is molded into the conducting polymer slip of required size；
The size for 1-6) pressing required TGXG at interval of one layer of conductive silver glue of smearing at equal position, and attaches copper foil formula
Conductive tape.
9. preparation method according to claim 7, which is characterized in that the preparation process of second rib is as follows：
Carbon black, polyethylene, polypropylene, the poly- EP rubbers of ternary 2-1) are molded into institute according to setting mass fraction through melt blending
Need the slip of size；
2-2) go out inner conductors path in rack surface telltale mark；
2-3) with gaining machine by the thread guide path cutting of label, it is desirable that groove depth is 2-4 times of diameter of wire, and groove depth less than etc.
In the 1/3 of the second rib thickness；
2-4) conducting wire and copper circuit measuring point are welded in rear embedded groove, and instills glue and fixes；
2-5) thermoplastic machine is used to fill slot to seal, wherein copper circuit measuring point is exposed；
Conductive silver glue, and copper foil formula conductive tape in posting in time 2-6) are uniformly smeared around copper circuit measuring point.
10. preparation method according to claim 7, which is characterized in that the step 2) is as follows：
It is 3-1) that carbon black, polyethylene, polypropylene and the poly- EP rubbers addition thermoplastic machine melting of ternary is spare；
3-2) be coated with one layer of conductive silver glue in first rib and the second rib, and copper-foil conducting electricity be set in the two staggered place, by first rib,
With connection circuit, blend compounds water carries out consolidation process early period for the copper-foil conducting electricity splicing alignment of second rib；
It 3-3) adopts and sealing water-proofing treatment is done to the stitching portion of first rib, the second rib；
Later stage consolidation process 3-4) is carried out to first rib, the second rib stitching portion using thermoplastic machine, forms thermoplastic lock, completes to spell
It connects.
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| CN206346207U (en) * | 2016-12-29 | 2017-07-21 | 山东路德新材料股份有限公司 | A kind of antiskid steel moulds grid |
| CN206359973U (en) * | 2016-12-29 | 2017-07-28 | 山东路德新材料股份有限公司 | A kind of umbo point steel plastic geogrid with groove |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6079277A (en) * | 1997-12-12 | 2000-06-27 | The Research Foundation Of State University Of New York | Methods and sensors for detecting strain and stress |
| JPH11241903A (en) * | 1997-12-26 | 1999-09-07 | Toyoaki Kimura | Strain sensor by conductive particle-polymer system |
| CN103718014A (en) * | 2011-04-13 | 2014-04-09 | 俄克拉何马大学董事会 | Sensor-enabled geosynthetic material, method of making and using the same |
| KR101244304B1 (en) * | 2011-10-20 | 2013-03-18 | 박현옥 | Detection system for the ground deformation |
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