System and method for testing whole hydraulic fracture process of concrete structural surface

Abstract

The invention relates to a system and a method for testing the whole hydraulic fracture process of a concrete structural surface. The system comprises a high-water-pressure loading device, a concrete-steel combined container and a hydraulic fracture whole-process nondestructive monitoring device, the high water pressure loading device is used for filling water and pressurizing the concrete-steel combined container; the concrete-steel combined container is used for the concrete member with the prefabricated crack to bear water filling pressure; the hydraulic fracture whole-process nondestructive monitoring device is used for monitoring strain, deformation and damage of the concrete member with the prefabricated crack; the high water pressure loading device is connected with the concrete-steel combined container, and the concrete-steel combined container is connected with the hydraulic fracture whole-process nondestructive monitoring device. The method is more suitable for the pressure water environment during actual work of the concrete dam, and data support is provided for theoretical analysis of the concrete hydraulic fracture damage evolution process.

Description

Technical Field

[0001] The invention relates to the technical field of concrete structure damage testing, and in particular to a whole-process testing system and method for hydraulic fracturing of a concrete structure surface. Background Art

[0002] Concrete is a porous composite material with initial defects. Under high water pressure, the initial defects may further develop and even form macro cracks, causing concrete structure failure, posing a potential safety hazard to the long-term safe and stable operation of the dam under high water pressure.

[0003] If hydraulic fracturing occurs under high water pressure, the mechanical properties of the concrete structure will be damaged, posing a threat to the safety of the dam. In the history of water conservancy engineering development, engineering accidents caused by hydraulic fracturing have occasionally occurred and have caused serious consequences. For example: the Dvorak Concrete Gravity Dam (219m), due to hydraulic fracturing, a split crack was formed on the upstream surface of the dam body, with a leakage of 483L / s, causing economic losses of more than 1 million US dollars in repair costs alone. It can be seen that the impact of concrete hydraulic fracturing is very serious. Studying and clarifying the mechanism of concrete hydraulic fracturing is the fundamental solution to this problem, and it plays a protective role in the long-term safe and stable operation of super-high concrete dams.

[0004] The existing concrete hydraulic fracturing laboratory tests mainly have the following design ideas:

[0005] 1. Hydraulic fracturing laboratory test based on the improved triaxial confining pressure test. This test method has promoted the research progress of concrete hydraulic fracturing and achieved certain results. However, the pressurized water environment provided by this test method is quite different from the high water pressure environment of the concrete dam structure surface, and its representativeness deserves further study.

[0006] 2. Hydraulic fracturing laboratory test based on the improved wedge splitting test. This test method promoted the study of the distribution of water pressure in concrete cracks. However, the water sealing problem of this test method was not well solved. The water pressure studied was small, and the pressurized water environment provided was also somewhat different from the water environment of the concrete dam structure surface. Moreover, the mutual influence relationship between mechanical load and water load was not explained.

[0007] 3. Original hydraulic fracturing laboratory test. This type of test method solves the water sealing problem and can carry out exploratory tests in a high water pressure environment. However, the degree of restoration of the high water pressure environment in the actual dam engineering structure surface is still under discussion, and the monitoring methods are relatively single, mostly the final destructive water pressure, which cannot reflect the hydraulic fracturing process.

[0008] In view of this, it is very necessary to design a full-process test system and method for hydraulic fracturing of concrete structures under high water head. Summary of the invention

[0009] The purpose of the present invention is to provide a full-process test system and method for hydraulic fracturing of concrete structural surfaces, which is more in line with the pressure water environment of the actual operation of the concrete dam and provides data support for the theoretical analysis of the evolution process of concrete hydraulic fracturing damage.

[0010] To achieve the above object, the present invention provides the following solutions:

[0011] The whole process test system of hydraulic fracturing of concrete structure surface includes: high water pressure loading device, concrete-steel composite container and non-destructive monitoring device of the whole process of hydraulic fracturing;

[0012] The high water pressure loading device is used to fill water and pressurize the concrete-steel combination container;

[0013] The concrete-steel composite container is used for concrete components with prefabricated cracks to withstand water filling pressure;

[0014] The non-destructive monitoring device for the whole process of hydraulic fracturing is used to monitor the strain, deformation and damage of the concrete component with prefabricated cracks;

[0015] The high water pressure loading device is connected to the concrete-steel combination container, and the concrete-steel combination container is connected to the hydraulic fracturing whole process non-destructive monitoring device.

[0016] Preferably, the high water pressure loading device comprises an electric pressure test pump and a water supply pressure pipe;

[0017] The electric pressure test pump is used to provide high-pressure liquid;

[0018] The water supply pressure pipe is distributed and connected with the electric pressure test pump and the concrete-steel combination container.

[0019] Preferably, the concrete-steel composite container comprises the concrete component with prefabricated cracks, a steel semi-open component, a pressure water gauge and a sealing material;

[0020] The steel semi-open member is matched with the concrete member with prefabricated cracks, the sealing material is arranged between the concrete member with prefabricated cracks and the steel semi-open member, and the pressure water meter is fixedly connected to the steel semi-open member.

[0021] Preferably, the concrete component with prefabricated cracks, the sealing material and the steel semi-open component are combined using fixed screws.

[0022] Preferably, the nondestructive monitoring device for the whole hydraulic fracturing process includes a DIC data image processing module, an AE acoustic emission module, a strain acquisition module and a Brillouin device;

[0023] The DIC data image processing module is used to monitor the deformation of the monitoring surface of the concrete component with prefabricated cracks after water pressure is applied;

[0024] The AE acoustic emission module is used to obtain the damage condition inside the concrete component with prefabricated cracks through the sound source signal;

[0025] The strain acquisition module is used to monitor the strain condition at the location where the full-bridge strain gauge is attached;

[0026] The Brillouin device is used to monitor the strain condition of the concrete component with prefabricated cracks through distributed strain sensing optical fiber.

[0027] Preferably, the full-bridge strain gauge is adhered to the precast crack tip and the structural surface of the concrete component with precast cracks.

[0028] The present invention also provides a whole-process test method for hydraulic fracturing of a concrete structure surface, comprising:

[0029] Obtaining concrete elements with prefabricated cracks;

[0030] Combining the prefabricated cracked concrete component and the steel semi-open component to obtain a concrete-steel composite container;

[0031] A high water pressure loading device is connected to the concrete-steel combination container through a water supply pressure pipe, and the concrete-steel combination container is filled with water and pressurized through the high water pressure loading device until the concrete component with prefabricated cracks is destroyed, and monitoring data is obtained through a non-destructive monitoring device for the entire hydraulic fracturing process.

[0032] Preferably, the combination of the prefabricated cracked concrete member and the steel semi-open member comprises:

[0033] The steel semi-open member is compatible with the concrete member with prefabricated cracks, the concrete member with prefabricated cracks, the sealing material and the steel semi-open member are fixedly connected via the fixing screw, and the pressure water meter is fixedly connected to the steel semi-open member.

[0034] The beneficial effects of the present invention are as follows: the present invention is not only more suitable for the pressure water environment of the concrete dam during actual operation, but also has a better sealing effect, ensuring the stability of the high water pressure environment in which the concrete structure surface is located. At the same time, a monitoring system for monitoring the entire hydraulic fracturing process is established to provide data support for the theoretical analysis of the evolution process of concrete hydraulic fracturing damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a flow chart of the whole process test method of hydraulic fracturing of concrete structure surface according to an embodiment of the present invention;

[0037] Figure 2 Schematic diagram of a full-process test system for hydraulic fracturing of a concrete structural surface according to an embodiment of the present invention;

[0038] Figure 3 A schematic diagram of a concrete-steel composite container according to an embodiment of the present invention;

[0039] Figure 4 It is a schematic diagram of the arrangement of strain gauges, acoustic emission probes, and distributed strain sensing optical fibers according to an embodiment of the present invention;

[0040] Among them, 1-electric pressure test pump, 2-strain acquisition module, 3-Brillouin device, 4-AE acoustic emission module, 5-concrete-steel composite container, 6-pressure water meter, 7-steel semi-open component, 8-concrete component with prefabricated cracks, 9-acoustic emission probe, 10-water injection port, 11-prefabricated cracks, 12-strain gauge, 13-distributed strain sensing optical fiber. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] Embodiment 1:

[0044] like Figure 2 As shown, this embodiment provides a whole-process test system for hydraulic fracturing of concrete structural surface, including: a high water pressure loading device, a concrete-steel combination container 5 and a whole-process non-destructive monitoring device for hydraulic fracturing;

[0045] A high water pressure loading device, used to fill the concrete-steel composite container 5 with water and pressurize it;

[0046] A concrete-steel composite container 5, used for concrete components 8 with prefabricated cracks to withstand water filling pressure;

[0047] A non-destructive monitoring device for the whole process of hydraulic fracturing, used to monitor the strain, deformation and damage of concrete components 8 with prefabricated cracks;

[0048] The high water pressure loading device is connected to the concrete-steel combination container 5, and the concrete-steel combination container 5 is connected to the non-destructive monitoring device for the whole process of hydraulic fracturing.

[0049] Furthermore, the high water pressure loading device includes an electric pressure test pump 1 and a water supply pressure pipe;

[0050] An electric pressure test pump 1, used for providing high-pressure liquid;

[0051] The water supply pressure pipe is connected to the electric pressure test pump 1 and the concrete-steel combination container 5 respectively.

[0052] Specifically, the high water pressure loading device in this embodiment includes: an electric pressure test pump 1 and a water supply pressure pipe. The electric pressure test pump 1 is a pressure supply device with a pressure regulating valve, and the pressure regulating valve is a component for regulating the pressure supply power of the electric pressure test pump 1. The water supply pressure pipe is a water pipe that can withstand high water pressure and has negligible deformation, and plays the role of connecting the electric pressure test pump 1 and the concrete-steel combination container 5.

[0053] Further, the concrete-steel composite container 5 includes a concrete member 8 with prefabricated cracks, a steel semi-open member 7, a pressure water meter 6 and a sealing material;

[0054] The steel semi-open member 7 is matched with the concrete member 8 with prefabricated cracks, a sealing material is arranged between the concrete member 8 with prefabricated cracks and the steel semi-open member 7, and the pressure water meter 6 is fixedly connected to the steel semi-open member 7.

[0055] Furthermore, the concrete member 8 with prefabricated cracks, the sealing material and the steel semi-open member 7 are combined by means of fixing screws.

[0056] Specifically, Figure 3As shown, in this embodiment, the concrete-steel composite container 5 can withstand high water pressure without leakage, and its components include: a concrete component 8 with prefabricated cracks, a steel semi-open component 7, a fixing screw, a pressure water meter 6 and a sealing material. The concrete component 8 with prefabricated cracks is prepared in advance before the test. The steel semi-open component 7 is a container component component customized according to design requirements and can be assembled and installed together with concrete. The pressure water meter 6 is installed on the steel semi-open component 7 to display the internal water pressure of the concrete-steel composite container 5, which is convenient for controlling the electric pressure test pump 1. The water injection port 10 is a hole opened in the steel semi-open component 7, and the aperture is determined by the water supply pressure pipe. The sealing material is a silica gel plate, which is placed between the concrete component 8 with prefabricated cracks and the steel semi-open component 7 to play a water-retaining and sealing role. The fixing screw plays the role of combining the concrete component 8 with prefabricated cracks, the steel semi-open component 7 and the sealing material.

[0057] Furthermore, the nondestructive monitoring device for the whole process of hydraulic fracturing includes a DIC data image processing module, an AE acoustic emission module 4, a strain acquisition module 2 and a Brillouin device 3;

[0058] DIC data image processing module, used to monitor the deformation of the monitoring surface of the concrete component 8 with prefabricated cracks after the water pressure is applied;

[0059] The AE acoustic emission module 4 is used to obtain the damage condition inside the concrete component 8 with prefabricated cracks through the sound source signal;

[0060] The strain acquisition module 2 is used to monitor the strain condition at the pasting position of the full-bridge strain gauge 12;

[0061] The Brillouin device 3 is used to monitor the strain of a concrete component 8 with prefabricated cracks through a distributed strain sensing optical fiber 13.

[0062] Furthermore, the full-bridge strain gauge 12 is pasted on the tip of the precast crack 11 and the structural surface of the concrete component 8 with precast cracks.

[0063] Specifically, the hydraulic fracturing whole process nondestructive monitoring system in this embodiment, i.e., the hydraulic fracturing whole process nondestructive monitoring module, is composed of DIC, AE, strain acquisition module 2, and Brillouin device 3. AE is an acoustic emission technology, which determines the damage inside the concrete component 8 with prefabricated cracks by the sound source signal. Its parameter setting mainly includes the positioning of the sensor probe and the setting of the frequency range of the sound source. The Brillouin device 3 is a tool connected to the distributed strain sensing optical fiber 13 to monitor the strain of the concrete component 8 with prefabricated cracks. Its main parameters mainly refer to the setting of the sampling step length. DIC is a digital image processing technology, which is used to monitor the deformation of the monitoring surface of the concrete component 8 with prefabricated cracks after applying water pressure. Its debugging mainly includes the calibration of the monitoring range. The monitoring surface is a structural surface with speckles prepared in advance. The strain acquisition module 2 refers to pasting a full-bridge strain gauge 12 on the tip of the prefabricated crack 11 and the structural surface of the concrete component 8 with prefabricated cracks, connecting it to the static acquisition board through wires, and monitoring the strain at the pasting position. The monitoring system is an automatic acquisition system.

[0064] Embodiment 2:

[0065] This embodiment provides a full-process test method for hydraulic fracturing of a concrete structure surface, including:

[0066] Obtaining a concrete component with prefabricated cracks 8;

[0067] Combine the prefabricated cracked concrete component and the steel semi-open component 7 to obtain a concrete-steel composite container 5;

[0068] The high water pressure loading device is connected to the concrete-steel combination container 5 through a water supply pressure pipe, and the concrete-steel combination container 5 is filled with water and pressurized through the high water pressure loading device until the concrete component 8 with prefabricated cracks is destroyed, and the monitoring data is obtained through the hydraulic splitting whole process non-destructive monitoring device.

[0069] Further, the combination of the concrete member with prefabricated cracks and the steel semi-open member 7 includes:

[0070] The steel semi-open member 7 is matched with the concrete member 8 with prefabricated cracks. The concrete member 8 with prefabricated cracks, the sealing material and the steel semi-open member 7 are fixedly connected by fixing screws. The pressure water meter 6 is fixedly connected to the steel semi-open member 7.

[0071] according to Figure 1 The whole process test method of hydraulic fracturing of concrete structure surface in this embodiment is further described, and the test method specifically includes:

[0072] 1. Preparation of concrete components:

[0073] The specific contents of preparing the concrete component include: preparing the mold; fixing the pre-supported crack plate; arranging the distributed strain sensing optical fiber 13 and the strain gauge 12; pouring; demoulding and curing.

[0074] The mold used in this embodiment is a steel mold, which is a template that assembles a steel plate customized according to the appearance of the concrete component and a prefabricated crack steel plate. At the same time, a sufficient number of holes are opened on the steel mold, and steel pipes of corresponding diameters are inserted to reserve holes that penetrate the concrete component. This hole is reserved on the concrete component for later use of fixed screws to assemble the concrete-steel composite container 5. After completing these tasks, a distributed strain sensing optical fiber 13 and a strain gauge 12 need to be arranged at the front end of the prefabricated crack steel plate, and then pouring begins.

[0075] Specifically, a 500*500*500mm prefabricated crack concrete component is prepared, and a steel plate and a prefabricated crack plate with a thickness of 8mm customized according to the appearance are assembled together. At the same time, 12 holes with a diameter of 13mm are opened on the steel mold, and a steel pipe with a diameter of 13mm is inserted, and 12 holes that penetrate the concrete component 8 with prefabricated cracks are reserved. After completing these tasks, distributed strain sensing optical fibers 13 are arranged at 1cm, 6cm, 11cm, 16cm, 20cm, and 25cm in front of the tip of the prefabricated crack steel plate, and then pouring begins. The prefabricated crack steel plate is a customized steel plate with a thickness of 3mm and a tip angle of 15°, which is polished and oiled.

[0076] Pouring means weighing the corresponding amount of gravel, sand, water and water reducing agent according to the mix ratio, pouring them into the vertical mixer in a certain order, and stirring. After the stirring is completed, take out the mixed material, place it on a steel plate, and then manually turn it over 2-3 times to make the moisture distribution of the mixture more even, and then put it into a steel mold, vibrate it, and let it stand to form.

[0077] Specifically, the pouring mix ratio is specially designed according to the test needs, which is gravel: sand: cement: water: water reducing agent = 1050.62: 660.49: 429.89: 171.75: 2.41kg / m 3 .

[0078] The mix ratio is the proportion of gravel, sand, cement, water and water reducing agent selected according to the actual project, or a special ratio based on test needs.

[0079] The specific sequence is to first pour gravel and sand into the vertical mixer, stir evenly, then pour in cement, stir evenly again, pour in part of the mixture of water and water reducer, stir evenly, then pour in the remaining water and water reducer mixture, and stir evenly.

[0080] Vibration is carried out using a vibrating rod. Every time a certain amount of mixture is added, the vibrating rod is used to vibrate as required to make the concrete dense.

[0081] After the cast specimens are formed and reach a certain hardness, the molds are removed and covered with geotextiles, and watered every day for maintenance for 28 days.

[0082] 2. Preparation of hydraulic loading device:

[0083] The specific contents of the preparation of the high water pressure loading device are: connecting the water supply pressure pipe to the water outlet of the electric pressure test pump 1, and then filling the water tank of the electric pressure test pump 1 with water.

[0084] 3. Assembly of concrete-steel composite container 5:

[0085] The assembly of the concrete-steel composite container 5 specifically refers to passing the fixing screw through the concrete component, the sealing material and the reserved through hole of the steel semi-open component 7 in sequence, and then tightening the nut according to the calculated torque. After tightening the fixing screw, the concrete-steel composite container 5 is placed vertically, that is, the steel semi-open component 7 is at the top. Finally, the pressure gauge is assembled to the steel semi-open component 7, and the assembly of the concrete-steel composite container 5 is completed.

[0086] This embodiment overcomes the sealing problem of the concrete-steel composite container 5 composed of concrete components and steel semi-open components 7 under high water pressure through sealing materials, and can ensure the stability of the water pressure provided by the electric pressure test pump 1 during the test. Leakage only occurs when the concrete components are damaged.

[0087] Specifically, 12 620 mm long fixing screws are passed through the concrete component 8 with prefabricated cracks, the sealing material, and the 12 through holes reserved in the steel semi-open component 7 in sequence. Then, a torque wrench is used to tighten the nuts according to the calculated torque of 53.3 N / m. After tightening the 12 fixing screws, the concrete-steel composite container 5 is placed vertically, that is, the steel semi-open component 7 is at the top. Finally, a pressure gauge with a range of 7 MPa is screwed on.

[0088] 4. Structural surface processing and collection component layout:

[0089] The main contents of structural surface treatment and collection element arrangement are: grinding the surface of concrete components with sandpaper, washing with water after grinding to remove surface dust. After the water is dried, the strain gauge 12, the acoustic emission probe 9 and the distributed strain sensing optical fiber 13 are pasted at specific positions.

[0090] Specifically, the surface of the concrete component 8 with prefabricated cracks is polished with sandpaper. After polishing, it is rinsed with water to remove dust from the surface of the concrete component 8 with prefabricated cracks. After the water is dried, the monitoring element acoustic emission probe 9 and strain gauge 12 are arranged. The specific arrangement diagram is shown in FIG. Figure 4. On the A surface, the strain gauge 12 is pasted at a position 10 cm away from the upper edge, and the acoustic emission probe 9 is not at the center point. The strain gauges 12 on the B, C, and D surfaces are pasted at a position 10 cm away from the upper edge, and the acoustic emission probes 9 are located 5 cm and 25 cm from the upper edge, 15 cm and 35 cm from the left edge, respectively, with one at each intersection. On the E surface, strain gauges 12 are arranged on the left and right sides 5 mm outside the tips of both sides of the prefabricated crack 11. A strain gauge 12 is arranged at a position 2 cm away from the left and right edges of the specimen. The distributed strain sensing optical fiber 13 is pasted on the C and D surfaces with 502 glue.

[0091] 5. Installation of high water pressure loading device:

[0092] The installation of the high water pressure loading device refers to connecting the concrete-steel composite container 5 and the electric pressure test pump 1 together through a water supply pressure pipe.

[0093] 6. Debugging of monitoring system:

[0094] The debugging of the monitoring system refers to the determination and setting of the relevant parameters of AE, DIC, strain acquisition system, and Brillouin device 3 before the test begins, to ensure that the acquisition components can work normally and transmit the data to the corresponding acquisition equipment.

[0095] Specifically, before the formal high water pressure loading test begins, AE, DIC, strain acquisition system, and Brillouin device 3 are connected to determine and set relevant parameters to ensure that the acquisition components can work normally and transmit data to the corresponding acquisition devices. The main parameter settings of AE include the positioning of the sensor probe and the setting of the frequency range of the acquisition sound source. The Brillouin device 3 is connected to the distributed strain sensing optical fiber 13, and its main debugging content includes determining the optical fiber connection length and the setting of the sampling step. DIC is used to monitor Figure 4 The B side is shown. The speckle is made on the B side by spray paint in advance. The main debugging parameters refer to the calibration of the monitoring range and the normal operation of the DIC monitoring lens. The debugging of the strain acquisition system refers to ensuring that the channel connected to the strain gauge 12 is in a balanced working state.

[0096] 7. Start the experiment:

[0097] Starting the test means that after completing the above steps, the power supply of the electric pressure test pump 1 is turned on, the switch is turned on, and the monitoring system and the electric pressure test pump 1 are started according to the pressure value required for the test. During the process, according to the pressure value displayed on the pressure gauge, the pressure regulating valve is adjusted to fill the concrete-steel composite container 5 with water and pressurize it. After reaching the pressure value required for the test, the electric pressure test pump 1 is turned off to maintain the test pressure value and maintain the time required for the test.

[0098] Specifically, after completing the above steps, the power supply of the electric pressure test pump 1 is turned on, and the loading gradient is 0.2MPa, and the pressure is stabilized for 5 minutes at each step. After loading to 3.2MPa and stabilizing the pressure for 3 minutes, the concrete-steel composite container 5 is damaged and starts to leak slowly. Subsequently, the loading gradient is 0.1MPa, and the pressure is still stabilized for 5 minutes at each step. Finally, at 3.94MPa, the concrete component 8 with prefabricated cracks is split and damaged as a whole. The pressure error is controlled at 5%. When the concrete-steel composite container 5 starts to leak and the stabilizing pressure is about to exceed the error control line, the electric pressure test pump 1 is turned on to supplement the pressure, so as to ensure that the pressure can be stabilized for 5 minutes at each gradient. This operation is repeated until the concrete component 8 with prefabricated cracks is damaged.

[0099] 8. Collation and analysis of test results

[0100] The test results are collated and analyzed. The collation of test results includes the collation of AE monitoring data, the collation of Brillouin device 3 monitoring data, the collation of DIC monitoring data, and the collation of strain acquisition system monitoring data. Analysis refers to the overall analysis of the data of each part of the monitoring system to determine the process of hydraulic fracturing, and then, based on relevant mechanical knowledge such as strength theory, the hydraulic fracturing phenomenon is theoretically characterized.

[0101] The embodiments described above are only descriptions of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. The whole process test system of hydraulic fracturing of concrete structure surface is characterized by: include: High water pressure loading device, concrete-steel composite container and non-destructive monitoring device for the whole process of hydraulic fracturing; The high water pressure loading device is used to fill water and pressurize the concrete-steel combination container; The concrete-steel composite container is used for concrete components with prefabricated cracks to withstand water filling pressure; The non-destructive monitoring device for the whole process of hydraulic fracturing is used to monitor the strain, deformation and damage of the concrete component with prefabricated cracks; The high water pressure loading device is connected to the concrete-steel combination container, and the concrete-steel combination container is connected to the hydraulic fracturing whole process non-destructive monitoring device.

2. The whole process test system of hydraulic fracturing of concrete structure surface according to claim 1 is characterized in that: The high water pressure loading device includes an electric pressure test pump and a water supply pressure pipe; The electric pressure test pump is used to provide high-pressure liquid; The water supply pressure pipe is connected to the electric pressure test pump and the concrete-steel combination container respectively.

3. The whole process test system of hydraulic fracturing of concrete structure surface according to claim 1 is characterized in that: The concrete-steel composite container comprises the concrete component with prefabricated cracks, a steel semi-open component, a pressure water gauge and sealing materials; The steel semi-open member is matched with the concrete member with prefabricated cracks, a sealing material is arranged between the concrete member with prefabricated cracks and the steel semi-open member, and the pressure water meter is fixedly connected to the steel semi-open member.

4. The whole process test system for hydraulic fracturing of concrete structure surface according to claim 3 is characterized in that: The concrete component with prefabricated cracks, the sealing material and the steel semi-open component are assembled by using fixing screws.

5. The whole process test system of hydraulic fracturing of concrete structure surface according to claim 1 is characterized in that: The nondestructive monitoring device for the whole process of hydraulic fracturing includes a DIC data image processing module, an AE acoustic emission module, a strain acquisition module and a Brillouin device; The DIC data image processing module is used to monitor the deformation of the monitoring surface of the concrete component with prefabricated cracks after water pressure is applied; The AE acoustic emission module is used to obtain the damage condition inside the concrete component with prefabricated cracks through the sound source signal; The strain acquisition module is used to monitor the strain condition at the attachment position of the full-bridge strain gauge; The Brillouin device is used to monitor the strain condition of the concrete component with prefabricated cracks through distributed strain sensing optical fiber.

6. The whole process test system of hydraulic fracturing of concrete structure surface according to claim 5 is characterized in that: The full-bridge strain gauge is adhered to the precast crack tip and the structural surface of the concrete component with precast cracks.

7. The test method of the whole process test system of hydraulic fracturing of concrete structure surface according to any one of claims 1 to 6, characterized in that: include: Obtaining concrete elements with prefabricated cracks; Combining the prefabricated cracked concrete component and the steel semi-open component to obtain a concrete-steel composite container; A high water pressure loading device is connected to the concrete-steel combination container through a water supply pressure pipe, and the concrete-steel combination container is filled with water and pressurized through the high water pressure loading device until the concrete component with prefabricated cracks is destroyed, and monitoring data is obtained through a non-destructive monitoring device for the entire hydraulic fracturing process.

8. The whole process test system for hydraulic fracturing of concrete structure surface according to claim 7 is characterized in that: Combining the prefabricated cracked concrete member and the steel semi-open member comprises: The steel semi-open member is compatible with the concrete member with prefabricated cracks, the concrete member with prefabricated cracks, the sealing material and the steel semi-open member are fixedly connected via the fixing screw, and the pressure water meter is fixedly connected to the steel semi-open member.

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