Consolidation grouting measuring point wave velocity qualification standard determination method and grouting quality evaluation method

Abstract

The invention belongs to the technical field of water conservancy and hydropower engineering, and provides a consolidation grouting measuring point wave velocity qualification standard determination method and a grouting quality assessment method.The consolidation grouting measuring point wave velocity qualification standard determination method comprises the steps that sites with different lithology and different grades of rock masses are selected for grouting simulation tests; the sites of the rock masses with various lithology and different grades comprise all lithology and rock mass grades of a part to be consolidated and grouted; according to the rock mass stability, the rock masses are sequentially divided into multiple types of rock masses from good to poor; and according to the rock mass stability, determining the wave velocity qualification standard of the sound wave measuring point. In the actual engineering detection process, the consolidation grouting quality of the single-hole or unit engineering is evaluated on the basis of the determined wave velocity qualification standard in combination with related requirements in a design file, it can be ensured that the consolidation grouting quality reaches the preset standard, the quality of the consolidation grouting engineering can be effectively evaluated, and it is ensured that the consolidation grouting engineering meets the engineering requirements.

Description

Technical Field

[0001] The invention belongs to the technical field of water conservancy and hydropower engineering, and particularly relates to a method for determining a qualified standard of wave velocity at a consolidation grouting measuring point and a method for evaluating grouting quality. Background Art

[0002] Consolidation grouting refers to an engineering measure that injects slurry into rock cracks or foundations with geological defects such as broken and loose rocks to improve their integrity and deformation resistance.

[0003] The current industry standard "Technical Specifications for Cement Grouting Construction of Hydraulic Structures" stipulates that the quality inspection of dam foundation rock consolidation grouting should adopt the method of detecting the elastic wave velocity of the rock mass, and the degree of increase in the rock mass velocity should be implemented according to the design requirements; the quality inspection of tunnel surrounding rock consolidation grouting is mainly based on the determination of the elastic wave velocity of the rock mass after grouting.

[0004] In actual projects, the evaluation of the consolidation grouting quality cannot be fully met according to the design documents, the testing units have difficulty in executing it, and the quality requirements of the engineering design cannot be met. Summary of the invention

[0005] In view of this, the present invention provides a method for determining a qualified standard of wave velocity at a consolidation grouting measuring point and a method for evaluating grouting quality, so as to solve the problem in the prior art that the quality of consolidation grouting cannot be effectively evaluated.

[0006] In the first aspect, the present invention provides a method for determining the wave velocity qualification standard of consolidation grouting measuring points, comprising: selecting sites of various lithologies and rock masses of different grades to conduct simulated grouting tests, wherein the sites of various lithologies and rock masses of different grades include all lithologies and rock mass grades of the locations where consolidation grouting is to be carried out; dividing the rock masses into multiple types in order from good to poor in terms of stability; and determining the wave velocity qualification standard of the acoustic wave measuring points based on the rock mass stability.

[0007] In an optional embodiment, the wave velocity qualification standard of the acoustic wave measuring point is determined according to the stability of the rock mass, specifically including: evaluating the stability of the rock mass before the simulated grouting test to obtain first stability evaluation data; evaluating the stability of the rock mass after the simulated grouting test to obtain second stability evaluation data; and determining the wave velocity qualification standard according to the first stability evaluation data and the second stability evaluation data.

[0008] In an optional embodiment, the stability of the rock mass before the simulated grouting test is evaluated to obtain first stability evaluation data, specifically including: performing a single-hole acoustic wave test before the simulated grouting test to calculate the lower limit value of the wave velocity of the rock mass that meets the design requirements before grouting, wherein the first stability evaluation data includes the lower limit value of the wave velocity before grouting.

[0009] In an optional embodiment, the stability of the rock mass after the simulated grouting test is evaluated to obtain second stability evaluation data, specifically including: based on the post-grouting point load test, drilling video and core sample inspection, the integrity of the rock mass after grouting, rock strength and structural surface status are obtained to obtain the second stability evaluation data.

[0010] In an optional embodiment, the post-filling wave velocity increase rate and the post-filling wave velocity lower limit data of the parts where the rock mass quality after filling of different grades meets the design requirements are calculated, and the second stability evaluation data includes the post-filling wave velocity increase rate and the post-filling wave velocity lower limit data.

[0011] In a second aspect, the present invention also provides a consolidation grouting quality evaluation method, comprising: determining the consolidation grouting quality measuring point wave velocity qualification standard according to any of the consolidation grouting measuring point wave velocity qualification standard determination methods; in engineering inspection, based on the wave velocity qualification standard and in accordance with the design documents, evaluating the consolidation grouting quality of a single hole or unit project.

[0012] In an optional embodiment, in engineering inspection, if the wave velocity to be measured exceeds the lower limit of the wave velocity before grouting in the wave velocity qualification standard, the grouting quality is evaluated as qualified.

[0013] In an optional embodiment, in engineering inspection, if the measured wave velocity is less than the lower limit of the wave velocity before grouting in the wave velocity qualification standard, and the measured wave velocity increase rate after grouting exceeds the wave velocity increase rate after grouting in the wave velocity qualification standard, the grouting quality is evaluated as qualified; or the measured wave velocity after grouting exceeds the wave velocity data after grouting in the wave velocity qualification standard, the grouting quality is evaluated as qualified.

[0014] In an optional embodiment, any of the consolidation grouting quality evaluation methods described in any one of the items further includes: in engineering inspection, counting the qualified rate of all measuring points after grouting within the scope of a single hole or unit project; and evaluating the consolidation grouting quality of a single hole or unit project according to the qualified rate requirements of the ultrasonic measuring points after grouting of the single hole or unit project specified in the design documents.

[0015] In an optional embodiment, any of the consolidation grouting quality evaluation methods further includes: obtaining water pressure test permeability; and evaluating the consolidation grouting quality of a single hole or unit project based on the water pressure test permeability.

[0016] The beneficial effects of the invention are as follows: in the actual engineering inspection process, based on the determined wave velocity qualification standard and combined with the relevant requirements in the design documents, the consolidation grouting quality of a single hole or unit project can be evaluated, which can ensure that the consolidation grouting quality reaches the predetermined standard, and can effectively evaluate the quality of the consolidation grouting project to ensure that it meets the engineering requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation of the present invention or the technical solution in the prior art, the following briefly introduces the drawings required for use in the specific implementation or the prior art description. Obviously, the drawings described below are some implementations of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a flow chart of a method for determining a wave velocity qualification standard of a consolidation grouting measuring point according to an embodiment of the present invention;

[0019] Figure 2 The present invention is a flowchart of a consolidation grouting evaluation method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The current industry standard "Technical Specifications for Cement Grouting Construction of Hydraulic Structures" (DL / T5148-2021) stipulates: The quality inspection of dam foundation rock consolidation grouting should adopt the method of detecting the elastic wave velocity of the rock mass. The degree of increase in the rock mass velocity should be implemented according to the design requirements, and the borehole water pressure test method can also be used; the quality inspection of tunnel surrounding rock consolidation grouting is mainly based on the determination of the elastic wave velocity of the rock mass after grouting. The elastic wave test should adopt the acoustic wave method or the seismic wave method. The qualified standard should be implemented according to the design requirements, supplemented by the water pressure test permeability.

[0024] The "Technical Specification for Cement Grouting Construction of Hydraulic Structures" (DL / T5148-2021) does not clearly stipulate the qualified standards for the wave velocity of the measuring point by the single-hole acoustic wave method for the quality inspection of consolidation grouting. In actual projects, there are problems such as the qualified standards for the wave velocity of the measuring points given in the design documents lack sufficient basis, the wording is vague, and it cannot fully meet the needs of the consolidation grouting quality evaluation, and the inspection units have difficulties in implementation. Ambiguous or unreasonable qualified standards can easily lead to the situation that the consolidation grouting at the measuring point that meets the qualified standards does not necessarily meet the actual expectations of the engineering design; the consolidation grouting at the measuring point that does not meet the qualified standards may also meet the actual expectations of the engineering design. Therefore, a method for determining the qualified standards for the wave velocity of the measuring point for the single-hole acoustic wave method for the inspection of the consolidation grouting quality disclosed in the present invention is very necessary.

[0025] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] Combine the following Figure 1 and Figure 2 , describing an embodiment of the present invention.

[0027] like Figure 1 As shown, according to an embodiment of the invention, a method for determining the qualified standard of wave velocity at a consolidation grouting measuring point is provided, comprising the following steps:

[0028] Step S101: selecting sites of various lithology and rock mass of different grades to conduct simulated grouting test, wherein the sites of various lithology and rock mass of different grades include all lithology and rock mass grades of the locations where consolidation grouting is to be performed;

[0029] Step S102: classifying the rock mass into multiple types according to the rock mass stability from good to poor;

[0030] Step S103: Determine the wave velocity qualification standard of the acoustic wave measuring point according to the rock mass stability.

[0031] In order to ensure the quality and effect of the grouting project, sites with different lithology and stability were selected for simulated grouting tests. These sites cover all lithology types and rock mass grades that may require consolidation grouting to ensure that the test results can fully reflect the actual situation. These sites are divided into multiple categories from high to low according to the stability of the rock mass, so as to facilitate more detailed research and analysis of the grouting effects under different stability conditions.

[0032] Based on the single-hole sonic test before filling, the rock mass that meets the design requirements before filling generally refers to Class I to II.

[0033] During the simulated grouting test, the wave velocity qualification standard of the acoustic wave measuring point is determined according to the stability level of the rock mass. This is because the stability of the rock mass directly affects the propagation speed and quality of the acoustic wave in the rock mass. By setting different wave velocity qualification standards, the grouting effect can be evaluated more accurately to ensure that the grouting project achieves the expected consolidation effect, thereby improving the safety and reliability of the entire project.

[0034] Further, based on step S103, the wave velocity qualification standard of the acoustic wave measuring point is determined according to the rock mass stability, which specifically includes the following steps:

[0035] Step S1031: Evaluate the stability of the rock mass before the simulated grouting test to obtain first stability evaluation data.

[0036] Step S1032: Evaluate the stability of the rock mass after the simulated grouting test to obtain second stability evaluation data.

[0037] Step S1033: Determine a wave speed qualification standard according to the first stability evaluation data and the second stability evaluation data.

[0038] Step S1031: First, it is necessary to evaluate the stability of the rock mass before the simulated grouting test. This step involves a detailed analysis of the physical and mechanical properties of the rock mass to ensure that the state of the rock mass before the test is reliable. Through this evaluation, the first stability evaluation data can be obtained, which will serve as the basis for subsequent analysis.

[0039] Step S1032: Next, the stability of the rock mass is evaluated again after the simulated grouting test. This step is to understand the impact of the grouting test on the stability of the rock mass, so as to obtain the second stability evaluation data. By comparing the stability data before and after the test, the grouting effect can be evaluated more accurately.

[0040] Step S1033: Finally, the first stability evaluation data and the second stability evaluation data are combined to comprehensively analyze the stability changes of the rock mass before and after grouting. Based on these data, the wave velocity qualification standard of the acoustic wave measurement point can be scientifically determined. This standard will ensure that the acoustic wave measurement results can truly reflect the stability of the rock mass, thereby providing a reliable basis for subsequent engineering decisions.

[0041] Through the above steps, not only can the stability of the rock mass before and after the grouting test be fully evaluated, but also the wave velocity qualification standards of the acoustic wave measuring points can be scientifically set according to these evaluation results, thereby improving the safety and reliability of the entire project.

[0042] Based on step S1031, the stability of the rock mass before the simulated grouting test is evaluated to obtain first stability evaluation data, which specifically includes:

[0043] A single-hole acoustic wave test is carried out before the simulated grouting test to calculate the lower limit of the wave velocity of the rock mass that meets the design requirements before grouting. The first stability evaluation data includes the lower limit of the wave velocity before grouting.

[0044] Understandably, before conducting the simulated grouting test, a single-hole acoustic wave test is first required, through which the lower limit of the wave velocity of the rock mass that meets the design requirements can be calculated. This lower limit of wave velocity is one of the key data for the stability of the rock mass before grouting, so it can be used as an important part of the first stability evaluation data. Specifically, the single-hole acoustic wave test is a method of evaluating the physical properties of the rock mass by using the characteristics of sound waves propagating in the rock mass. By measuring the propagation speed of sound waves in the rock mass, important parameters such as the density and porosity of the rock mass can be understood. These parameters are crucial for evaluating the stability of the rock mass and the grouting effect. Therefore, before the grouting test begins, it is very necessary to ensure that the wave velocity of the rock mass meets the lower limit of the design requirements. This not only helps to ensure the grouting effect, but also provides reliable data support for subsequent stability evaluation.

[0045] Step S1032: Evaluate the stability of the rock mass after the simulated grouting test to obtain second stability evaluation data, specifically including:

[0046] Based on the post-grouting point load test, drilling video and core sample inspection, the integrity of the rock mass after grouting, rock strength and structural surface status are obtained, and the second stability evaluation data is obtained.

[0047] Understandably, through the comprehensive analysis of post-filling point load test, drilling video and core sample inspection, we can understand in detail the integrity of the rock mass after filling, the strength of the rock and the state of the structural surface. The acquisition of these data provides an important basis for the second stage of stability evaluation. Specifically, the post-filling point load test can evaluate the bearing capacity of the rock mass under load, the drilling video can intuitively display the structural characteristics and crack development inside the rock mass, and the core sample inspection can further verify the strength and integrity of the rock. Through the comprehensive application of these methods, the stability of the rock mass can be evaluated more accurately, providing a scientific reference for subsequent engineering design and construction.

[0048] Further, step S1032: evaluate the stability of the rock mass after the simulated grouting test, and obtain the second stability evaluation data, including: calculating the increase rate of wave velocity after grouting and the lower limit data of wave velocity after grouting at the parts where the rock mass quality after grouting of different grades of rock mass meets the design requirements, and the second stability evaluation data includes the increase rate of wave velocity after grouting and the lower limit data of wave velocity after grouting.

[0049] After the simulated grouting test of the rock mass, in order to comprehensively evaluate its stability, detailed analysis and calculation can be carried out to obtain the second round of stability evaluation data. These data mainly involve the quality of rock masses of different grades after grouting to ensure that they meet the design requirements. Different grades of rock mass generally refer to Class III to Class V. Specifically, the wave velocity increase rate of the rock mass quality after grouting in each part and the lower limit of the wave velocity after grouting can be calculated. Through these data, the impact of grouting effect on rock mass stability can be more accurately understood. The second round of stability evaluation data mainly includes two aspects: one is the increase rate of rock mass wave velocity after grouting, and the other is the lower limit of rock mass wave velocity after grouting. These data provide an important reference basis, which can further optimize the grouting plan and ensure the long-term stability and safety of the rock mass.

[0050] like Figure 2 As shown, the present invention also provides a consolidation grouting quality evaluation method, comprising the following steps:

[0051] Step S201: determining the qualified standard of the wave velocity at the consolidation grouting quality measuring point according to any method for determining the qualified standard of the wave velocity at the consolidation grouting measuring point.

[0052] Step S202: In engineering inspection, based on the wave velocity qualification standard and in accordance with the design documents, the quality of consolidation grouting of a single hole or unit engineering is evaluated.

[0053] Step S201: First, according to any of the consolidation grouting measurement point velocity qualification standards, the consolidation grouting quality measurement point velocity qualification standards are determined. This means that before the consolidation grouting quality evaluation is performed, a velocity qualification standard needs to be set to ensure the accuracy of the subsequent evaluation.

[0054] Step S202: In the actual engineering inspection process, based on the determined wave velocity qualification standard and combined with the relevant requirements in the design documents, the consolidation grouting quality of the single hole or unit project is evaluated. This evaluation process needs to comprehensively consider the wave velocity data and the specific requirements in the design documents to ensure that the consolidation grouting quality meets the predetermined standards. In this way, the quality of the consolidation grouting project can be effectively evaluated to ensure that it meets the engineering requirements.

[0055] Furthermore, in engineering inspection, if the wave velocity to be measured exceeds the lower limit of the wave velocity before grouting in the wave velocity qualification standard, the grouting quality is evaluated as qualified.

[0056] During the engineering inspection process, if the measured wave velocity exceeds the lower limit of the wave velocity before grouting specified in the wave velocity qualification standard, then it can be concluded that the quality of the grouting meets the requirements.

[0057] Furthermore, in engineering inspection, if the measured wave velocity is less than the lower limit of the wave velocity before grouting in the wave velocity qualification standard, and the measured wave velocity increase rate after grouting exceeds the wave velocity increase rate after grouting in the wave velocity qualification standard, the grouting quality is evaluated as qualified; or the measured wave velocity after grouting exceeds the wave velocity data after grouting in the wave velocity qualification standard, the grouting quality is evaluated as qualified.

[0058] In the process of engineering inspection, we usually set a series of wave velocity qualification standards to ensure the quality of the project. Specifically, if the wave velocity to be measured is lower than the set lower limit of the wave velocity before grouting, but after the grouting treatment, the measured wave velocity increase rate exceeds the specified wave velocity increase rate standard after grouting, then we can consider that the grouting treatment is successful, and thus evaluate the grouting quality as qualified. In addition, if the measured wave velocity after grouting itself exceeds the specific value in the set post-grouting wave velocity qualification standard, then the grouting quality can also be judged to be qualified. Both situations indicate that the grouting treatment has achieved the expected effect and ensured the quality and safety of the project.

[0059] The rock mass grade is determined by the surrounding rock engineering geological classification and dam foundation rock engineering geological classification in the current national standards "Specifications for Geological Investigation for Hydropower Engineering" GB 50287 and "Specifications for Geological Investigation for Water Conservancy and Hydropower Engineering" GB 50487, and is divided into Class I to Class V rock masses in order of rock mass stability from good to poor.

[0060] like Figure 2As shown in the figure, single-hole acoustic wave test, point load test, drilling video and core sample inspection are carried out at the specified age after grouting to obtain the integrity, rock strength and structural surface state of the rock mass after grouting, and then comprehensively evaluate whether the stability of the rock mass after grouting meets the design requirements according to the requirements of the specifications and expert opinions. Different grades of rock mass, generally referring to Class III to Class V rock mass, calculate the post-grouting wave velocity increase rate η and the post-grouting wave velocity lower limit V of the parts where the rock mass quality of different grades of rock mass meets the design requirements after grouting 2 In engineering testing, the wave velocity before filling shall not be less than V 1 , the wave velocity before injection is less than V 1 And the wave velocity increase rate after filling exceeds η or the wave velocity after filling exceeds V 2 The test score was rated as qualified.

[0061] Among them, rock mass with poor stability is Class III, unstable rock mass is Class IV, and extremely unstable rock mass is Class V. After consolidation grouting, the strength and integrity of the rock mass will be improved, the gaps in the structural surface will be filled with cement slurry, and the corresponding wave velocity after grouting will be increased to a certain extent.

[0062] Rock masses with good stability are usually Class I to II rock masses, which are often characterized by good rock integrity, high rock strength, few structural surfaces, and low grouting properties. The rock mass quality before grouting meets the design requirements, and the wave velocities at the measuring points of this type of rock mass after grouting are considered qualified.

[0063] Furthermore, the consolidation grouting quality evaluation method further includes the following steps:

[0064] Step S203: In the engineering inspection, the qualified rates of all the measuring points after filling in a single hole or unit engineering are counted.

[0065] Step S204: Evaluate the consolidation grouting quality of the single hole or unit project according to the qualified rate requirements of the acoustic wave measurement points after grouting of the single hole or unit project specified in the design documents.

[0066] In the process of engineering inspection, it is necessary to conduct a comprehensive statistical analysis of the grouting effect within the scope of a single hole or unit project. Specifically, collect and record the data of all measuring points after grouting, and then calculate the qualified ratio of these measuring points. This qualified ratio means that the grouting effect of the measuring point has reached the predetermined standards and requirements, thereby ensuring the reliability and stability of the grouting quality.

[0067] After obtaining the qualified rate of post-grouting measurement points within the scope of a single hole or unit project, the evaluation is carried out according to the qualified rate requirements of the acoustic wave measurement points after grouting of the single hole or unit project clearly specified in the design documents. The design documents will list in detail the specific standards for grouting quality, including the qualified rate standards for acoustic wave measurement points. Using these standards as the evaluation basis, a comprehensive evaluation is conducted on the consolidation grouting quality of the single hole or unit project. In this way, it can be ensured that the grouting quality meets the design requirements, thereby ensuring the overall safety and reliability of the project.

[0068] The consolidation grouting quality evaluation method of the present invention further comprises the following steps:

[0069] Step S205: Obtain water permeability of the water pressure test.

[0070] Step S206: Evaluate the consolidation grouting quality of a single hole or unit project based on the water pressure test permeability.

[0071] By conducting a water pressure test, the water permeability data of each hole or unit project can be obtained. The water pressure test is a commonly used detection method. By injecting water at a certain pressure into the hole and measuring the water penetration, the water permeability value is obtained.

[0072] Based on the water permeability data obtained from the water pressure test, the quality of consolidation grouting of a single hole or the entire unit project is comprehensively evaluated. The water permeability directly reflects the quality of the grouting effect. The lower the water permeability, the higher the grouting density and the better the consolidation effect; on the contrary, it indicates that the grouting may have defects and requires further inspection and treatment. Through this evaluation step, it can be effectively judged whether the quality of consolidation grouting meets the design requirements, thereby providing a reliable basis for the subsequent project.

[0073] The present invention can also use other methods to assist in testing the quality of consolidation grouting, which will not be described in detail here.

[0074] By conducting grouting simulation tests on various lithology and rock mass grades within the scope of consolidation grouting, the qualified standards for measuring point wave velocity are determined with the support of test data, which is more reasonable and scientific; the evaluation standards for qualified measuring point wave velocity of consolidation grouting quality testing by single-hole acoustic wave method are refined and quantified; expert experience is introduced to avoid misjudgment that may be caused by pure digital calculations.

[0075] Obviously, the above embodiments are merely examples for clear description and are not limitations of the implementation methods.

[0076] For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, the obvious changes or modifications derived from this are still within the protection scope of the invention.

Claims

1. A method for determining the qualified standard of wave velocity at consolidation grouting measuring points, characterized in that: include: Selecting sites of various lithology and rock mass grades to conduct simulated grouting tests, wherein the sites of various lithology and rock mass grades include all lithology and rock mass grades of the locations where consolidation grouting is to be performed; Rock masses are divided into several types according to their stability from good to poor; According to the rock mass stability, the wave velocity qualification standard of the acoustic wave measuring point is determined.

2. The method for determining the qualified standard of wave velocity at consolidation grouting measuring points according to claim 1 is characterized in that: According to the rock mass stability, the wave velocity qualification standard of the acoustic wave measuring point is determined, which specifically includes: Evaluate the stability of the rock mass before the simulated grouting test and obtain the first stability evaluation data; Evaluate the stability of the rock mass after the simulated grouting test and obtain the second stability evaluation data; The wave speed qualification standard is determined according to the first stability evaluation data and the second stability evaluation data.

3. The method for determining the qualified standard of wave velocity at consolidation grouting measuring points according to claim 2 is characterized in that: Evaluate the stability of the rock mass before the simulated grouting test and obtain the first stability evaluation data, including: A single-hole acoustic wave test is performed before the simulated grouting test to calculate the lower limit of the wave velocity of the rock mass that meets the design requirements before grouting, and the first stability evaluation data includes the lower limit of the wave velocity before grouting.

4. The method for determining the qualified standard of wave velocity at consolidation grouting measuring points according to claim 2 is characterized in that: Evaluate the stability of the rock mass after the simulated grouting test and obtain the second stability evaluation data, including: Based on the post-grouting point load test, drilling video and core sample inspection, the integrity of the rock mass after grouting, rock strength and structural surface status are obtained to obtain the second stability evaluation data.

5. The method for determining the qualified standard of wave velocity at consolidation grouting measuring points according to claim 4 is characterized in that: The wave velocity increase rate after filling and the lower limit data of the wave velocity after filling of the parts where the rock mass quality after filling of different grades meets the design requirements are calculated, and the second stability evaluation data includes the wave velocity increase rate after filling and the lower limit data of the wave velocity after filling.

6. A method for evaluating the quality of consolidation grouting, characterized in that: include: Determine the qualified standard of the wave velocity of the consolidation grouting quality measuring point according to the method for determining the qualified standard of the wave velocity of the consolidation grouting measuring point according to any one of claims 1 to 5; In engineering inspection, the quality of consolidation grouting of a single hole or unit project is evaluated based on the wave velocity qualification standard and in accordance with the design documents.

7. The consolidation grouting quality evaluation method according to claim 6, characterized in that: In engineering inspection, if the wave velocity to be measured exceeds the lower limit of the wave velocity before grouting in the wave velocity qualification standard, the grouting quality is evaluated as qualified.

8. The consolidation grouting quality evaluation method according to claim 6, characterized in that: In engineering inspection, if the measured wave velocity is less than the lower limit of the wave velocity before grouting in the wave velocity qualification standard, and the measured wave velocity increase rate after grouting exceeds the wave velocity increase rate after grouting in the wave velocity qualification standard, the grouting quality is evaluated as qualified; or the measured wave velocity after grouting exceeds the wave velocity data after grouting in the wave velocity qualification standard, the grouting quality is evaluated as qualified.

9. The consolidation grouting quality evaluation method according to any one of claims 6 to 8, characterized in that: Also includes: In engineering inspection, the qualified rate of all measuring points after filling in a single hole or unit project is counted; Evaluate the consolidation grouting quality of single-hole or unit engineering according to the qualified rate requirements of the acoustic wave measurement points after grouting of the single-hole or unit engineering specified in the design documents.

10. The consolidation grouting quality evaluation method according to any one of claims 6 to 8, characterized in that: Also includes: Obtain water permeability from water pressure test; The consolidation grouting quality of a single hole or unit project is evaluated based on the water pressure test permeability.

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