CN111579597A - Detection and monitoring method for grouting material by utilizing conductivity difference - Google Patents
Detection and monitoring method for grouting material by utilizing conductivity difference Download PDFInfo
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- CN111579597A CN111579597A CN202010449306.0A CN202010449306A CN111579597A CN 111579597 A CN111579597 A CN 111579597A CN 202010449306 A CN202010449306 A CN 202010449306A CN 111579597 A CN111579597 A CN 111579597A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
- G01N27/07—Construction of measuring vessels; Electrodes therefor
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/022—Carbon
- C04B14/024—Graphite
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/46—Rock wool ; Ceramic or silicate fibres
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/48—Metal
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
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- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/002—Water
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- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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Abstract
The invention discloses a method for detecting and monitoring a grouting material by utilizing conductivity difference, which comprises the following steps of: pre-burying a plurality of electrodes in an area to be grouted; obtaining an original resistance value of an area to be grouted by adopting an electrode method; the type and the proportion of the conductive material in the grouting material are changed according to the original resistance value adjustment, and grouting and pouring of the area to be grouted are carried out; and (3) obtaining the current resistance after grouting by adopting an electrode method, wherein if the original resistance value is the same as or infinitely close to the current resistance, the area does not contain grouting materials, and otherwise, the area already contains the grouting materials. Through the scheme, the grouting material detection method has the advantages of low cost, high resource utilization rate, simplicity and convenience in detection and the like, and has high practical value and popularization value in the technical field of grouting materials.
Description
Technical Field
The invention relates to the technical field of grouting materials, in particular to a method for detecting and monitoring a grouting material by utilizing difference of conductivity.
Background
The grouting detection and monitoring process can be used in various environments suitable for grouting, and the grouting effect and quality detection is to detect the grouting filling condition after grouting and whether the grouting filling condition meets the physical and mechanical properties of design requirements. The traditional grouting detection is to drill a field sample after grouting, and detect the sample by adopting a laboratory strength test and observing grouting quality; firstly, the construction process cannot be monitored in real time, meanwhile, only fixed-point detection can be carried out on detection points, the number, the positions and the like of drilling are limited, and the later-stage detection method is time-consuming, high in cost and incapable of mastering comprehensive grouting conditions. Moreover, after drilling and coring, the drilling point needs to be subjected to secondary grouting to seal the hole, and the hole sealing quality also influences the final grouting quality. In grouting detection and monitoring, the number of ground drilling samples is large, after grouting and pouring, the flow direction of grouting materials which cannot be visually observed is obtained, and the trend, the width and the like of cracks are unknown, so that the traditional drilling detection and monitoring is blind, and a 'scab and hundreds of holes' in a to-be-grouted area is possibly caused, so that the detection and monitoring workload is large, and the original geological conditions are seriously damaged.
In order to realize rapid detection and monitoring, the invention provides a novel grouting method for monitoring and detecting grouting effect in real time by using the resistance difference between grouting material and surrounding rock soil or other materials, a novel grouting material design method matched with the grouting method and detection and monitoring equipment, wherein cavities or/and rock mass water and the like exist in grouting cavities under the environment, wherein the rock mass water also contains a large amount of conductive ions or conductive metal materials, so that the conductivity of the grouting material needs to be reduced; similarly, if the grouting environment is a cavity type, the conductivity of the grouting material is nearly infinitesimal, and in this case, it is required to increase the conductivity of the grouting material. The method can be suitable for grouting detection and monitoring under different conditions, is simple in construction and good in performance, and the proportion design of the conductive grouting material can select corresponding additive materials according to different environmental characteristics, so that the method is convenient and effective.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a method for detecting and monitoring a grouting material using differences in conductivity, the method using the following technical solutions:
a method for detecting and monitoring a grouting material by utilizing conductivity difference comprises the following steps:
pre-burying a plurality of electrodes in an area to be grouted;
obtaining an original resistance value of an area to be grouted by adopting an electrode method;
adjusting the category and the proportion of the conductive material in the grouting material according to the original resistance value, and performing grouting and pouring of the area to be grouted;
and (3) obtaining the current resistance after grouting by adopting an electrode method, wherein if the original resistance value is the same as or infinitely close to the current resistance, the area does not contain grouting materials, and otherwise, the area already contains the grouting materials.
Further, the category and the ratio of the conductive material in the grouting material are changed according to the original resistance value, the ratio of basalt fiber or graphite or steel fiber in the grouting material is adjusted, and the ratio value range is 0.1% -50%.
Preferably, the grouting material utilizing the difference in conductivity further comprises one or more of a cement-based material, a gypsum-based material, a gelling material, a fine aggregate, a coarse aggregate, and water. All of these materials can be solid waste materials meeting environmental requirements.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention skillfully provides grouting material detection based on an electrode method, drilling and taking off-line detection are not needed after grouting and pouring, the detection efficiency is high, the construction cost is low, and a brand-new detection process is provided in the technical field of grouting material detection and monitoring;
(2) the invention skillfully adopts basalt fiber as a raw material, has the function of reducing the conductivity of the grouting material, and is suitable for the environment containing a large amount of conductive ions or conductive metal materials; similarly, the graphite and the steel fibers are adopted in the invention to improve the conductivity of the grouting material, and the grouting material is suitable for environments such as cavities and the like.
(3) The invention skillfully utilizes the composition materials and the proportion of one or a plurality of combinations of solid waste novel cement-based materials, gypsum-based materials, cementing materials, fine aggregates, coarse aggregates and water (the materials can all use solid waste materials meeting the environmental requirements), changes the resistance of the grouting material and solves the problem of strength reduction commonly existing in resistance reduction materials.
(4) The invention realizes the differentiation of the grouting material and the original geological engineering environment by changing the resistivity so as to be convenient for the performance detection of the grouting material, and can realize the on-line detection (pre-embedded probe) without drilling a sample.
(5) The invention saves the cost of grouting detection, saves energy, improves the resource utilization rate and reduces underground space, particularly water pollution.
In conclusion, the invention has the advantages of low cost, high resource utilization rate, simple and convenient detection and the like, and has very high practical value and popularization value in the technical field of grouting materials.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of protection, and it is obvious for those skilled in the art that other related drawings can be obtained according to these drawings without inventive efforts.
Fig. 1 is a schematic diagram (one) of resistivity test of the grouting material of the present invention.
Fig. 2 is a schematic diagram (two) of the resistivity test of the grouting material according to the present invention.
FIG. 3 is a graph showing the on-site test of the amount of graphite or steel fibers added in accordance with the present invention versus the resistance value.
FIG. 4 is a graph showing the on-site test of the amount of basalt fiber added to the electric resistance according to the present invention.
Detailed Description
To further clarify the objects, technical solutions and advantages of the present application, the present invention will be further described with reference to the following examples, which include, but are not limited to, the following examples. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Examples
As shown in fig. 1 to 4, the present embodiment provides a method for detecting and monitoring a grouting material using a difference in conductivity, including the steps of:
firstly, pre-burying a plurality of electrodes in an area to be grouted; in this embodiment, the depth of the pre-buried electrode is far lower than the drilling depth, and not only can the quality detection after grouting and pouring be provided, but also the detection of the durability of the grouting material and the like in the later period can be guaranteed.
And secondly, obtaining the original resistance value of the area to be grouted by adopting an electrode method.
Thirdly, adjusting the types and the proportion of the conductive materials in the grouting materials utilizing the conductive property difference according to the original resistance value, and performing grouting and pouring of the area to be grouted; for example, in a grouting area of a tunnel, the grouting area contains a large amount of conductive ions, and in order to distinguish rock and soil from grouting materials, the conductivity of the grouting materials needs to be reduced, and the resistance value needs to be increased, as shown in fig. 4, in this embodiment, the resistance value is increased by adding basalt fibers; in addition, in this embodiment, a hole is also selected, and the resistance value is approximately infinite, so that the conductivity needs to be increased and the resistance value needs to be decreased, as shown in fig. 3, in this embodiment, the resistance value is decreased by adding graphite or steel fiber. Intuitively speaking, for example, if the original resistance value is 1 Ω, adding basalt fiber into the grouting material to increase the resistance, for example, to 10000 Ω, at this time, pouring the grouting material in the crack, measuring the resistance value after grouting, and if the resistance value is still 1 Ω, indicating that the detected area is free of the conductive grouting material; if the resistance value of this region is 400 Ω or higher, then the resistance value of this region is a significant variation of the invention; it is indicated that the region is provided with the conductive grouting material. Similarly, when the original resistance of a certain area is 9000 Ω, which indicates that there is a cavity in the area, graphite or steel fibers are added to the conductive grouting material to increase the conductivity and decrease the resistance, and if the resistance value of the detected area is significantly different from the original resistance, it indicates that there is conductive grouting material in the area.
And fourthly, solving the current resistance after grouting by adopting an electrode method, wherein if the original resistance value is the same as or infinitely close to the current resistance, the area does not contain grouting materials, otherwise, the area already contains the grouting materials.
In addition, the conductive material added in this embodiment is 0.1% -50% of basalt fiber or graphite or steel fiber, and the grouting material utilizing the difference in conductivity may further include one or a combination of cement-based material, gypsum-based material, cementitious material, fine aggregate, coarse aggregate and water (these materials may all use solid waste materials (except water)).
Because the grouting material using the difference in conductivity is a brand new material, in order to verify the conductivity and strength of different proportions, the conductivity and strength tests of different conductivity materials with different proportions are performed, and part of the intermediate test results are as follows:
it can be known from the table that the resistance value of the grouting material is changed by basalt fiber or graphite or steel fiber accounting for 0.1-50% of the total proportion, and the grouting resistivity is improved or reduced to obviously distinguish the original geology.
In conclusion, the grouting material detection and monitoring device fills the technical blank that grouting material detection and monitoring can be carried out without drilling a test sample, reduces the construction cost, and can also shorten the construction period.
The above-mentioned embodiments are only preferred embodiments of the present invention, and do not limit the scope of the present invention, but all the modifications made by the principles of the present invention and the non-inventive efforts based on the above-mentioned embodiments shall fall within the scope of the present invention.
Claims (3)
1. A method for detecting and monitoring a grouting material by utilizing conductivity difference is characterized by comprising the following steps:
pre-burying a plurality of electrodes in an area to be grouted;
obtaining an original resistance value of an area to be grouted by adopting an electrode method;
the type and the proportion of the conductive material in the grouting material are changed according to the original resistance value adjustment, and grouting and pouring of the area to be grouted are carried out;
and (3) obtaining the current resistance after grouting by adopting an electrode method, wherein if the original resistance value is the same as or infinitely close to the current resistance, the area does not contain grouting materials, and otherwise, the area already contains the grouting materials.
2. The method for detecting and monitoring the grouting material with the difference in conductivity according to claim 1, wherein the type and the proportion of the conductive material are changed in the grouting material according to the original resistance value, and the proportion of basalt fiber, graphite or steel fiber in the grouting material is adjusted, and the value range of the proportion is 0.1% -50%.
3. The method for detecting and monitoring a grouting material utilizing conductivity difference as claimed in claim 2, wherein the grouting material further comprises one or more of cement-based material, gypsum-based material, solid waste material, gelling material, fine aggregate, coarse aggregate and water.
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| CN202010449306.0A CN111579597A (en) | 2020-05-25 | 2020-05-25 | Detection and monitoring method for grouting material by utilizing conductivity difference |
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| CN202010449306.0A CN111579597A (en) | 2020-05-25 | 2020-05-25 | Detection and monitoring method for grouting material by utilizing conductivity difference |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101150956B1 (en) * | 2011-11-21 | 2012-05-29 | 주식회사 도화엔지니어링 | Grouting method using electric conducting tracer |
| CN105257276A (en) * | 2015-11-18 | 2016-01-20 | 中国华冶科工集团有限公司 | Grouting monitoring system and monitoring method thereof |
| CN108802110A (en) * | 2018-05-31 | 2018-11-13 | 宁波联城住工科技有限公司 | Detection device and its detection method for measuring grout sleeve Grouted density |
| CN109540972A (en) * | 2018-11-21 | 2019-03-29 | 东南大学 | Sleeve grouting quality detection device |
| CN109856191A (en) * | 2019-01-04 | 2019-06-07 | 西南交通大学 | A method of detection sleeve grouting quality |
| CN109959683A (en) * | 2019-04-18 | 2019-07-02 | 南通大学 | A kind of detection method of sleeve Grouted density quality |
| CN110273440A (en) * | 2019-06-03 | 2019-09-24 | 中北大学 | A kind of superfilled monitoring system and method for bored concrete pile |
| CN110359502A (en) * | 2019-07-15 | 2019-10-22 | 深圳市地质环境研究院有限公司 | A kind of automatic monitoring method of cast-in-place pile concrete face height |
-
2020
- 2020-05-25 CN CN202010449306.0A patent/CN111579597A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101150956B1 (en) * | 2011-11-21 | 2012-05-29 | 주식회사 도화엔지니어링 | Grouting method using electric conducting tracer |
| CN105257276A (en) * | 2015-11-18 | 2016-01-20 | 中国华冶科工集团有限公司 | Grouting monitoring system and monitoring method thereof |
| CN108802110A (en) * | 2018-05-31 | 2018-11-13 | 宁波联城住工科技有限公司 | Detection device and its detection method for measuring grout sleeve Grouted density |
| CN109540972A (en) * | 2018-11-21 | 2019-03-29 | 东南大学 | Sleeve grouting quality detection device |
| CN109856191A (en) * | 2019-01-04 | 2019-06-07 | 西南交通大学 | A method of detection sleeve grouting quality |
| CN109959683A (en) * | 2019-04-18 | 2019-07-02 | 南通大学 | A kind of detection method of sleeve Grouted density quality |
| CN110273440A (en) * | 2019-06-03 | 2019-09-24 | 中北大学 | A kind of superfilled monitoring system and method for bored concrete pile |
| CN110359502A (en) * | 2019-07-15 | 2019-10-22 | 深圳市地质环境研究院有限公司 | A kind of automatic monitoring method of cast-in-place pile concrete face height |
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Application publication date: 20200825 |