阅读说明：本技术 一种利用导电性能差异的灌浆材料的检测与监测方法 (Detection and monitoring method for grouting material by utilizing conductivity difference ) 是由 胡瑾 王向鹏 于 2020-05-25 设计创作，主要内容包括：本发明公开了一种利用导电性能差异的灌浆材料的检测与监测方法,包括以下步骤：在待灌浆的区域预埋数根电极；采用电极法求得待灌浆的区域的原始电阻值；根据原始电阻值调整灌浆材料中改变导电性能材料的种类与占比,并进行待灌浆的区域的灌浆浇筑；采用电极法求得灌浆后的当前电阻,若原始电阻值与当前电阻相同或无限接近,则该区域无灌浆材料,否则,该区域已含有灌浆材料。通过上述方案,本发明具有成本低廉、资源利用率高、检测简便等等优点,在灌浆材料技术领域具有很高的实用价值和推广价值。(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.)

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.

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.