CN112683333A - Method for testing stress and deformation of inner wall of concrete vertical shaft well based on concrete conductivity - Google Patents
Method for testing stress and deformation of inner wall of concrete vertical shaft well based on concrete conductivity Download PDFInfo
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- CN112683333A CN112683333A CN202011586942.4A CN202011586942A CN112683333A CN 112683333 A CN112683333 A CN 112683333A CN 202011586942 A CN202011586942 A CN 202011586942A CN 112683333 A CN112683333 A CN 112683333A
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Abstract
The invention discloses a method for testing stress and deformation of a vertical shaft concrete inner shaft wall based on concrete conductivity characteristics, which is suitable for nondestructive stress and deformation testing of the shaft wall in newly built shaft concrete. Short carbon fibers are added into the inner well wall of the vertical shaft concrete at a position where the inner well wall of the vertical shaft concrete is subjected to large stress and common damage, so that the inner well wall of the local vertical shaft concrete has the conductivity characteristic and the self-sensing stress characteristic; based on the principle that the compression deformation resistance changes remarkably, the nondestructive online diagnosis and detection of the stress condition and the damage degree of the inner well wall of the vertical well concrete are realized by adopting a specially designed scanning test circuit and a wireless transmission technology. This technique changes the uncertainty of the passive sum point test of original test technique, reduces testing error, adds the carbon fiber and can improve tensile, the bending resistance ability of concrete, does not reduce the intensity and the security of interior wall of a well, has: the construction is simple and convenient, the cost performance is high, the testing precision is high, and the like.
Description
Technical Field
The invention relates to a method for testing stress and deformation of a vertical shaft concrete inner shaft wall based on concrete conductive characteristics, which is particularly suitable for establishing nondestructive testing of the stress and deformation of the shaft wall in the shaft concrete,
background
The vertical shaft is the most key part for coal mine production, and the safety and stability of the vertical shaft are the premise for ensuring the safety production of the whole coal mine. The load of the vertical shaft wall is difficult to accurately and reasonably determine when the vertical shaft penetrates through a complex special stratum, and the construction cost, the construction difficulty and the potential safety hazard of the vertical shaft are further increased along with the increase of the stratum depth according to the design thickness of the shaft wall of the coal mine vertical shaft and chamber design specification (GB 50384-2016). The core problem is that the load of the well wall is not clear, and the amplification and reduction of the load outside the well wall are not desirable in engineering construction.
The conventional well wall testing method mainly comprises the following scheme:
(1) installing a surface strain gauge on the inner surface of a vertical shaft: the scheme has small disturbance to the well wall, can obtain the deformation and stress of the inner surface of the well wall of the vertical shaft, but is limited by the number of measuring points, can only obtain the deformation and stress of local points, still needs to invert the stress of the well wall through a certain simplified mathematical model, and most of the surface strain gauges are arranged at relatively complete well wall positions and have poor reliability on the estimation of broken and broken well wall loads;
(2) installing a strain gauge inside a vertical shaft wall: the scheme has large disturbance on the well wall, can obtain the three-dimensional deformation and stress state of the vertical well wall, but is also limited by insufficient measuring points and the limitation of installation positions, and has poor accuracy on the evaluation of the broken and broken well wall load;
(3) directly testing the water and soil pressure of the vertical shaft wall: the method is only suitable for newly built shafts, and the soil pressure gauge and the water pressure gauge are buried between the well wall and surrounding rocks during construction to directly test the water pressure and the soil pressure of the well wall in the concrete of the vertical shaft, which is the most direct test method.
In summary, the traditional test scheme cannot directly test the stress state of the vertical shaft, or the test method has large disturbance to the vertical shaft, or the test data of the whole life cycle is difficult to obtain due to the limitation of manual conditions, and an omnibearing nondestructive test scheme for the stress condition of the inner shaft wall of the vertical shaft concrete is urgently needed at present.
Disclosure of Invention
The technical problem is as follows: the invention aims to overcome the defects in the prior art, and provides a method for testing the stress and deformation of a vertical shaft concrete inner shaft wall based on the concrete conductivity, which can achieve the omnibearing vertical shaft concrete inner shaft wall stress condition test, simultaneously can reduce the test scheme of shaft wall damage to the greatest extent, improves the uncertainty of changing the traditional passive point test and reduces the test error.
The technical scheme is as follows: the invention discloses a method for testing stress and deformation of a concrete inner wall of a vertical shaft based on the conductive property of concrete, which comprises the following steps: when the inner well wall of the vertical well concrete at the test layer position is poured, the conductive concrete is prepared by adopting a doping method, dispersed short carbon fiber solution is prepared before the concrete is stirred, then the dry materials are mixed and stirred uniformly, the short carbon fiber solution is slowly poured into a stirrer instead of mixing water, the mixture is continuously stirred to form concrete slurry, then the concrete slurry is poured into a mold, and finally the concrete slurry is vibrated and formed, and then the mold is removed for maintenance, so that the inner well wall of the conductive concrete with the conductivity characteristic and the self-sensing stress characteristic is formed; the method comprises the steps that a plurality of red copper electrodes are pre-buried before concrete is poured, each red copper electrode is connected through a red copper wire to form a scanning test circuit, an automatic data acquisition device is arranged at a position where the vertical shaft concrete well wall is stressed greatly and damaged frequently, and acquired information is transmitted to a well head data acquisition computer through a plurality of wireless transmission modules arranged on the inner side of the well wall at intervals; the method comprises the following specific steps:
a. firstly, the total concrete consumption of the section height of the conductive concrete is calculated, and the stirring amount of a concrete stirring station is 0.5m each time3A hopper, calculating the proportion of the conductive concrete stirred each time;
b. preparing conductive concrete by adopting a doping method, putting required mixing water into a container, placing the container under a high-speed dispersion instrument, starting the dispersion instrument with the rotating speed of 1500 r/min-2500 r/min, slowly adding a dispersing agent with the doping amount of 0.1-0.4% of the mass of the concrete into the water, after the preparation of a dispersing agent solution is finished, uniformly pouring short carbon fibers with the doping amount of 0.2-0.6% of the mass of the concrete into the dispersing agent solution, and continuously stirring for about 15-30 min to form a short carbon fiber solution;
c. uniformly stirring dry materials for preparing concrete, slowly pouring short carbon fiber solution instead of mixing water into a stirrer, continuously stirring to form concrete slurry, pouring into a mold, vibrating for molding, and then demolding and maintaining;
d. designing the net diameter of the inner well wall of the well concrete and the height of the inner well wall of the conductive concrete, and arranging a plurality of red copper electrodes for testing, wherein the plurality of red copper electrodes are uniformly arranged in the inner well wall of the conductive concrete according to the inner diameter of the well;
e. the method comprises the steps that red copper electrodes are pre-buried before concrete is poured, in order to ensure that the red copper electrodes are not in contact with reinforcing steel bars in a vertical shaft concrete inner shaft wall, after the red copper electrodes are connected with wires, the red copper electrodes are fixed at one end of a PPR (polypropylene random access) water pipe connected with the reinforcing steel bars in the shaft, then epoxy resin glue is poured into the pipe, finally the PPR water pipe is bound with shaft wall reinforcing steel bars to achieve pre-burying of the red copper electrodes, each red copper electrode is a scanning test circuit formed by connecting red copper wires with the diameter of 1-3 mm, an automatic data acquisition device is arranged at a position where the vertical shaft concrete shaft wall is stressed greatly and damaged commonly, and information acquired by the automatic data acquisition device is wirelessly transmitted to a wellhead data acquisition computer through a plurality of wireless transmission modules arranged on the inner side of the shaft wall at intervals;
f. and (3) acquiring the resistance values of the red copper electrodes at different positions in real time to invert the stress, deformation and damage characteristic information of the inner well wall of the vertical well concrete, and obtaining the conductive characteristic results of the conductive concrete with the same grade under different load actions.
The method comprises the steps of preparing conductive concrete by adopting a blending method, putting required mixing water into a container, placing the container under a high-speed dispersion instrument, starting the dispersion instrument with the rotating speed of 2000r/min, slowly adding a base cellulose dispersing agent with the blending amount of 0.2% of the mass of the concrete into the water, after the base cellulose dispersing agent solution is prepared, uniformly pouring short carbon fibers with the blending amount of 0.3% of the mass of the concrete into the water, and continuously stirring for about 20min to form the short carbon fiber solution.
The length range of the short carbon fiber is 0.1-5 mm.
The red copper electrode is pre-buried and is made of a red copper rod with the diameter of 5-15mm and the length of 15-30 cm.
The resistance of the conductive concrete is 300-500 omega cm, and the resistance is reduced along with the increase of the yield of the short carbon fiber.
The position for manufacturing the conductive concrete is set according to the stress characteristics of the inner well wall of the concrete of the vertical well, and the height H is 3-6 m.
The plurality of red copper electrodes are arranged in a multi-row array mode, and the distance B is 0.8-1.2 m.
The wireless transmission modules are arranged in a layer at intervals of 200-500m along the well wall according to the transmission capacity.
The resistance of the conductive concrete changes along with the increase of the curing time and the increase of the concrete strength, the increase speed of the concrete resistance is faster in the first 7 days of curing, the increase speed reaches more than 60%, the increase speed reaches more than 70% in 14 days, and the resistance is stable in 28 days.
Has the advantages that: due to the adoption of the technical scheme, the method is suitable for safety monitoring of the whole life cycle during construction and operation, can improve the defects of discretization, damage to well wall integrity and the like of the existing vertical shaft concrete inner well wall safety monitoring, and can provide an important basis for design optimization of the vertical shaft concrete inner well wall through an actual measurement result. On the basis of the stress and damage characteristics of the inner wall of the vertical shaft concrete, short carbon fibers are added into the inner wall of the vertical shaft concrete through a blending method firstly at the common damage position with large stress on the wall of the shaft during the construction of the wall of the shaft, so that the inner wall of the vertical shaft concrete has the conductivity characteristic and the self-sensing stress characteristic, the length range of the adopted carbon fibers is 0.1-5 mm, the uniaxial compressive strength of the blending method and the short carbon fiber concrete is improved by 5-10%, and the strength of a double-sided shear test is improved by 6-20%. The problem that the conventional carbon fiber is small in monofilament diameter and smooth in surface and lacks functional groups, so that the chopped carbon fiber is easy to agglomerate is solved. Under the action of unequal cyclic load, the short carbon fiber concrete can well sense the stress and has good pressure sensitivity. The resistance change amplitude is improved along with the increase of the load, the resistance change rate is increased by about 3 percent when the load is increased by 80KN, and the resistance change rate presents a linear growth relation before the damage occurs. Existing concrete is poorly conductive and typically has a resistivity of about 105～107Omega cm, resistance of the conductive concrete prepared by the inventionThe resistance of the conductive concrete is 300-500 omega cm, the trend of resistance reduction along with increase of the yield of the short carbon fiber is presented based on the pressure-sensitive principle of the conductive concrete, and a specially designed scanning test circuit is adopted to carry out nondestructive online diagnosis and detection on the stress condition and the damage degree of the inner well wall of the vertical well concrete in real time. Can reach the test of all-round shaft wall stress situation in the vertical concrete, can minimize the test scheme to the wall of a well damage simultaneously again, change the uncertainty of traditional passive some tests, reduce the testing error, add carbon fiber and can improve tensile, the anti performance of rolling over of concrete, have that the construction is simple and convenient, sexual valence relative altitude, measuring accuracy height etc. multiple advantages, have extensive practicality in this technical field.
Drawings
FIG. 1 is a schematic view of a system for testing the inner wall of concrete of a conductive concrete vertical shaft;
FIG. 2 is a plan view of an arrangement of conductive concrete red copper electrodes;
fig. 3 is a section development view of the conductive concrete red copper electrode arrangement.
In the figure: the test method comprises the following steps of 1-a vertical shaft concrete inner shaft wall, 2-a conductive concrete inner shaft wall, 3-a surface soil layer, 4-a weathering zone, 5-a bedrock section, 6-a red copper electrode, 7-a red copper wire, 8-a scanning test circuit, 9-an automatic data acquisition device, 10-a wireless transmission module and 11-a data acquisition computer. H-section height, B-spacing, net diameter of well wall in L-vertical concrete 5.5 x 3.14-17.27 m
Detailed Description
The invention will be further described with reference to examples in the drawings to which:
the method for testing the stress and deformation of the inner wall of the vertical shaft concrete based on the concrete conductive property is described by taking a double-layer wall structure for freezing shaft sinking in a deep surface soil layer as an example, the wall of the type is subjected to vertical additional force caused by stratum settlement, the maximum stress and damage area is mainly concentrated on a weathering zone 4 at the boundary of a surface soil layer 3 and a bedrock section 5, as shown in figure 1, and therefore the conductive inner wall 2 arranged at the position can directly test the maximum load of the inner wall 1 of the vertical shaft concrete. The height H of the vertical shaft concrete template adopted by the section height of the conductive concrete inner well wall 2 is 3.6m, the wall thickness is 500mm, the net diameter of the well bore is 5.5m, and the net diameter L of the vertical shaft concrete inner well wall is 5.5 x 3.14 x 17.27 m; concrete designation C40. When the inner well wall 1 of the vertical well concrete at the test layer position is poured, the conductive concrete is prepared by adopting a doping method, dispersed short carbon fiber solution is prepared before the concrete is stirred, then the dry materials are mixed and stirred uniformly, the short carbon fiber solution is slowly poured into a stirrer instead of mixing water, the mixture is continuously stirred to form concrete slurry, then the concrete slurry is poured into a mold, finally the concrete slurry is vibrated and formed, and then the mold is removed for maintenance, so that the inner well wall 2 of the conductive concrete with the characteristics of conductivity, self-perception, self-adaptation and self-repair is formed; the method comprises the steps that a plurality of red copper electrodes 6 are pre-buried before concrete is poured, each red copper electrode 6 is connected through a red copper wire 7 to form a scanning test circuit 8, an automatic data acquisition device 9 is arranged at a position where the vertical shaft concrete shaft wall is stressed greatly and damaged frequently, and acquired information is transmitted to a wellhead data acquisition computer 11 through a plurality of wireless transmission modules 10 arranged on the inner side of the shaft wall at intervals; the method comprises the following specific steps:
a. firstly, the total concrete consumption of the section height of the conductive concrete is calculated, and the concrete consumption with the height H of 3.6m is 34m3In order to ensure the stirring effect, the stirring amount of each time of the concrete stirring station is 0.5m3The proportion of the conductive concrete stirred each time can be calculated;
b. preparing conductive concrete by adopting a doping method, putting required mixing water into a container, placing the container under a high-speed dispersion instrument, starting the dispersion instrument with the rotating speed of 1500 r/min-2500 r/min, slowly adding a dispersing agent with the doping amount of 0.1-0.4% of the mass of the concrete into the water, after the preparation of a dispersing agent solution is finished, uniformly pouring short carbon fibers with the doping amount of 0.2-0.6% of the mass of the concrete into the dispersing agent solution, and continuously stirring for about 15-30 min to form a short carbon fiber solution; the best method is firstly to mix the conductive concrete, the required mixing water is put into a container and placed under a high-speed dispersion instrument, the dispersion instrument with the rotating speed of 2000r/min is started, the base cellulose dispersing agent with the mixing amount of 0.2 percent of the mass of the concrete is slowly added into the water, after the solution of the base cellulose dispersing agent is prepared, the short carbon fiber with the mixing amount of 0.3 percent of the mass of the concrete is evenly poured into the solution, and the solution is continuously stirred for about 20min to form the short carbon fiber solution. The length range of the short carbon fiber is 0.1-5 mm. The position for manufacturing the conductive concrete is set according to the stress characteristic of the inner well wall 1 of the vertical shaft concrete, and the height H is 3-6 m.
c. Uniformly stirring the commonly used dry materials (coarse aggregate, fine aggregate and cement) for preparing concrete, slowly pouring the mixture into a stirrer by using a short carbon fiber solution instead of mixing water, continuously stirring to form concrete slurry, pouring the concrete slurry into a mold, vibrating the concrete slurry for forming, and then demolding and curing;
d. designing the net diameter of a well wall 1 in the well concrete and the height of a well wall 2 in the conductive concrete, and arranging a plurality of red copper electrodes 6 for testing, wherein the plurality of red copper electrodes 6 are uniformly arranged in the well wall 2 in the conductive concrete according to the integral number of the inner diameter of a shaft; the red copper electrodes 6 are arranged in a multi-row array mode, and the distance B is 0.8-1.2 m. According to the net diameter of the well wall of 5.5m and the height H of the well wall 2 in the conductive concrete of 3.6m, 32 red copper electrodes 6 are distributed for testing, the red copper electrodes 6 are divided into two layers, and the transverse distance B and the longitudinal distance B are 1m, which is shown in the figure 2 and the figure 3.
e. The method comprises the steps of pre-burying a red copper electrode 6 before concrete pouring, ensuring that the red copper electrode 6 is not in contact with reinforcing steel bars arranged in a shaft, fixing the red copper electrode 6 at one end of a PPR (polypropylene random access) water pipe connected with reinforcing steel bars in a well after the red copper electrode 6 is wired, then pouring epoxy resin glue into the pipe, finally binding the PPR water pipe with the reinforcing steel bars on the wall of the well to achieve pre-burying of the red copper electrode 6, connecting each red copper electrode 6 by a red copper wire 7 with the diameter of 1 mm-3 mm to form a scanning test circuit 8, arranging an automatic data acquisition device 9 at a position with large stress and common damage on the wall of the concrete well of the vertical well, and wirelessly transmitting information acquired by the automatic data acquisition device 9 to a wellhead data acquisition computer 11 through a plurality of wireless transmission modules 10 arranged on the inner side of the wall of the well at intervals to avoid influence of long wire resistance on a test result. The red copper electrode 6 is made of a pre-buried red copper bar with the diameter of 5-15mm and the length of 15-30 cm. The wireless transmission modules 10 are arranged in a layer at intervals of 200-500m along the well wall according to the transmission capacity.
f. And (3) acquiring the resistance values of the red copper electrodes 6 at different positions in real time to invert the stress, deformation and damage characteristic information of the inner well wall 1 of the vertical well concrete, and obtaining the conductive characteristic results of the conductive concrete with the same grade under different load effects.
Based on the conducting characteristic test results of different load effects of the conducting concrete 2 with the same label obtained in a laboratory, the stress, deformation and damage characteristics of the inner well wall 1 of the vertical shaft concrete are inverted by utilizing the resistance values of different red copper electrodes 6 acquired in real time on site. The length range of the selected short carbon fiber is 0.1-5 mm, the resistance of the conductive concrete changes along with the increase of the curing time and the increase of the concrete strength, the increase speed of the resistance of the concrete is faster to more than 60 percent in the first 7 days of curing, the increase speed of the resistance of the concrete reaches more than 70 percent in 14 days, the resistance of the conductive concrete is stable in 28 days, the resistance of the conductive concrete is 300-500 omega cm, and the resistance of the conductive concrete is reduced along with the increase of the yield and the doping amount of the short carbon fiber.
Claims (9)
1. A method for testing stress and deformation of a wall in vertical shaft concrete based on concrete conductivity is characterized by comprising the following steps: when the inner concrete well wall (1) of the vertical well at the test layer position is poured, the conductive concrete is prepared by adopting a doping method, dispersed short carbon fiber solution is prepared before the concrete is stirred, then dry materials are mixed and stirred uniformly, the mixture is slowly poured into a stirrer by using the short carbon fiber solution instead of mixing water, the mixture is continuously stirred to form concrete slurry, then the concrete slurry is poured into a mold, and finally the concrete slurry is vibrated and formed, and then the mold is removed for maintenance, so that the inner conductive concrete well wall (2) with the conductivity characteristic and the self-sensing stress characteristic is formed; the method comprises the steps that a plurality of red copper electrodes (6) are pre-buried before concrete is poured, each red copper electrode (6) adopts a scanning test circuit (8) formed by connecting red copper wires (7), an automatic data acquisition device (9) is arranged at a position where the vertical shaft concrete well wall is stressed greatly and damaged commonly, and acquired information is transmitted to a wellhead data acquisition computer (11) through a plurality of wireless transmission modules (10) arranged on the inner side of the well wall at intervals; the method comprises the following specific steps:
a. firstly, the total concrete consumption of the section height of the conductive concrete is calculated, and the stirring amount of a concrete stirring station is 0.5m each time3A hopper, calculating the proportion of the conductive concrete stirred each time;
b. preparing conductive concrete by adopting a doping method, putting required mixing water into a container, placing the container under a high-speed dispersion instrument, starting the dispersion instrument with the rotating speed of 1500 r/min-2500 r/min, slowly adding a dispersing agent with the doping amount of 0.1-0.4% of the mass of the concrete into the water, after the preparation of a dispersing agent solution is finished, uniformly pouring short carbon fibers with the doping amount of 0.2-0.6% of the mass of the concrete into the dispersing agent solution, and continuously stirring for about 15-30 min to form a short carbon fiber solution;
c. uniformly stirring dry materials for preparing concrete, slowly pouring short carbon fiber solution instead of mixing water into a stirrer, continuously stirring to form concrete slurry, pouring into a mold, vibrating for molding, and then demolding and maintaining;
d. designing the net diameter of the inner well wall (1) of the well concrete and the height of the inner well wall (2) of the conductive concrete, and arranging a plurality of red copper electrodes (6) for testing, wherein the red copper electrodes (6) are uniformly arranged in the inner well wall (2) of the conductive concrete according to the internal diameter of a shaft;
e. the red copper electrode (6) is pre-embedded before the concrete is poured, in order to ensure that the red copper electrode (6) is not contacted with the reinforcing steel bars in the inner well wall of the concrete of the vertical well, after the red copper electrode (6) is connected with the wire, the red copper electrode (6) is fixed at one end of the PPR water pipe connected with the steel bar in the well, then epoxy resin glue is poured into the pipe, finally the PPR water pipe is bound with the well wall reinforcing steel bar to realize the pre-embedding of the red copper electrodes (6), each red copper electrode (6) adopts a scanning test circuit (8) formed by connecting red copper wires (7) with the diameter of 1 mm-3 mm, an automatic data acquisition device (9) is arranged at a position where the vertical shaft concrete well wall is stressed greatly and is damaged frequently, the information acquired by the automatic data acquisition device (9) is wirelessly transmitted to a wellhead data acquisition computer (11) through a plurality of wireless transmission modules (10) which are arranged on the inner side of the well wall at intervals;
f. and (3) acquiring the resistance values of the red copper electrodes (6) at different positions in real time to invert the stress, deformation and damage characteristic information of the inner well wall (1) of the vertical well concrete, and obtaining the conductive characteristic results of the conductive concrete with the same label under different load actions.
2. The method for testing the stress and deformation of the inner wall of the vertical shaft concrete based on the conductive property of the concrete according to claim 1, wherein the method comprises the following steps: the method comprises the steps of preparing conductive concrete by adopting a blending method, putting required mixing water into a container, placing the container under a high-speed dispersion instrument, starting the dispersion instrument with the rotating speed of 2000r/min, slowly adding a base cellulose dispersing agent with the blending amount of 0.2% of the mass of the concrete into the water, after the base cellulose dispersing agent solution is prepared, uniformly pouring short carbon fibers with the blending amount of 0.3% of the mass of the concrete into the water, and continuously stirring for about 20min to form the short carbon fiber solution.
3. The method for testing the stress and deformation of the inner wall of the vertical shaft concrete based on the conductive property of the concrete according to claim 1, wherein the method comprises the following steps: the length range of the short carbon fiber is 0.1-5 mm.
4. The method for testing the stress and deformation of the inner wall of the vertical shaft concrete based on the conductive property of the concrete according to claim 1, wherein the method comprises the following steps: the red copper electrode (6) is made of a pre-buried red copper bar with the diameter of 5-15mm and the length of 15-30 cm.
5. The method for testing the stress and deformation of the inner wall of the vertical shaft concrete based on the conductive property of the concrete according to claim 1, wherein the method comprises the following steps: the resistance of the conductive concrete is 300-500 omega cm, and the resistance of the conductive concrete is reduced along with the increase of the doping amount of the short carbon fiber.
6. The method for testing the stress and deformation of the inner wall of the vertical shaft concrete based on the conductive property of the concrete according to claim 1, wherein the method comprises the following steps: the position for manufacturing the conductive concrete is set according to the stress characteristic of the inner well wall (1) of the vertical shaft concrete, and the height H is 3-6 m.
7. The method for testing the stress and deformation of the inner wall of the vertical shaft concrete based on the conductive property of the concrete according to claim 1, wherein the method comprises the following steps: the red copper electrodes (6) are arranged in a multi-row array mode, and the distance B is 0.8-1.2 m.
8. The method for testing the stress and deformation of the inner wall of the vertical shaft concrete based on the conductive property of the concrete according to claim 1, wherein the method comprises the following steps: the wireless transmission modules (10) are arranged in a layer at intervals of 200-500m along the well wall according to the transmission capacity.
9. The method for testing the stress and deformation of the inner wall of the vertical shaft concrete based on the conductive property of the concrete according to claim 1, wherein the method comprises the following steps: the resistance of the conductive concrete changes along with the increase of the curing time and the increase of the concrete strength, the increase speed of the concrete resistance is faster in the first 7 days of curing, the increase speed reaches more than 60%, the increase speed reaches more than 70% in 14 days, and the resistance is stable in 28 days.
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