Batholith anti-seepage curtain bottom line determination method based on geological partition and multi-level decision

Abstract

The invention provides a batholith anti-seepage curtain bottom line determination method based on geological partition and multi-level decision, which comprises the following steps: segmenting a dam foundation according to engineering geological survey data, and objectively scoring and classifying geological conditions such as rock mass permeability rate, weathering degree and the like through a quantitative scoring table; according to different dam sections and geological conditions, decision-making scenes are divided in combination with the relative impervious layer depth, corresponding curtain bottom line functions are set respectively, and finally, a bottom line of a complex geological area in the middle section of a dam foundation serves as a control reference, and a continuous global defensive line is formed through connection of broken lines with the limited gradient. According to the method, traditional qualitative judgment depending on experience is converted into standardized decision-making based on quantitative parameters, the objectivity, reproducibility and economical efficiency of design achievements are remarkably improved while it is ensured that seepage prevention is safe and reliable, and the method can dynamically adapt to various complex geological conditions.

Description

Technical Field

[0001] This invention belongs to the field of water conservancy engineering technology and relates to a method for determining the bottom line of a rock foundation anti-seepage curtain. Background Technology

[0002] Grouting of the anti-seepage curtain is a core engineering measure to ensure the safety of dam foundation seepage, reduce uplift pressure, and prevent seepage damage. Determining the bottom line of the anti-seepage curtain is the most critical and fundamental aspect of curtain design, directly determining the safety and economic benefits of the project. However, the current determination of the bottom line of the anti-seepage curtain faces the following technical problems: the basis is relatively singular, mainly referring to code provisions and personal experience. Especially when dealing with complex rock foundations such as strongly weathered, faulted, and karst, the general statements in the code, such as "deeply buried or irregularly distributed" and "determined based on engineering experience," lack precise quantitative guidance, leading to significant subjectivity and arbitrariness in the design, and insufficient scientific rigor, objectivity, and reliability of the results.

[0003] This can easily lead to two types of risks: First, excessive conservatism, where, even with relatively favorable geological conditions or extremely deep impermeable layers, over-reliance on the upper limit of experience results in an excessively deep curtain grout line, leading to poor engineering economics and wasted resources. Second, insufficient understanding, resulting in an overly high design limit, creating a "suspended curtain" that cannot effectively cut off seepage, leading to poor seepage prevention, increased seepage and uplift pressure at the dam foundation, and threatening dam safety. Curtain grouting is a concealed project; defects are difficult to remedy after water impoundment and are extremely costly to treat. Design errors can lead to a surge in subsequent reinforcement and mitigation costs, resulting in serious economic losses and safety hazards. Summary of the Invention

[0004] To address the problems mentioned in the background art regarding the determination of the bottom line of seepage prevention curtains, such as the reliance on a single design basis, significant subjectivity and arbitrariness, low scientific rigor, objectivity, and reliability of the results, and poor seepage prevention effects or engineering economics, this invention provides a method for determining the bottom line of rock-based seepage prevention curtains based on geological zoning and multi-level decision-making. This method avoids subjectivity and arbitrariness in design while ensuring safe and reliable seepage, achieving a scientific, economical, and reproducible determination of the bottom line, thus improving the scientific rigor, objectivity, and reliability of the bottom line determination from the source.

[0005] The first aspect of this application provides a method for determining the bottom line of a rock-based seepage-proof curtain based on geological zoning and multi-level decision-making, including: Based on the engineering geological survey data of the rock foundation, the dam foundation is divided into the middle section, the left abutment section, and the right abutment section along the dam axis, and the geological parameters of the middle section, the left abutment section, and the right abutment section are obtained. A quantitative scoring table for geological conditions is constructed based on the rock mass permeability, rock mass weathering degree, fault and fracture development and their corresponding condition descriptions and quantitative index scores. Based on the engineering geological survey data of the rock foundation, borehole water pressure test, geophysical test and geological logging results, combined with the geological parameters of the middle section of the dam foundation, the left abutment section and the right abutment section, the geological conditions are scored based on the geological condition quantitative scoring table and the total geological condition score is calculated. The geological conditions are judged as good or complex by comparing with the set judgment threshold. Based on the geological condition assessment results, corresponding curtain bottom line functions were set for the left and right abutment sections to obtain the curtain bottom lines for the left and right abutment sections. For the middle section of the dam foundation, based on the geological condition assessment results, it is divided into several complex geological dam sections and good geological dam sections. The relative impermeable layer depth is judged for each of the divided dam sections. Based on the judgment results, two decision scenarios are distinguished: normal depth and excessively deep impermeable layer. The curtain bottom line function is set for the two scenarios in combination with the geological condition assessment results. Finally, the curtain bottom line of the middle section of the dam foundation is obtained by integration. The curtain bottom line of the complex geological zone in the middle section of the dam foundation is determined as the global control bottom line. Based on the global control bottom line, the curtain bottom lines of the adjacent areas of the complex geological zone in the middle section of the dam foundation, the left abutment section and the right abutment section are connected by a broken line. The slope of the broken line is limited to not be steeper than the preset limit, and finally a continuous global seepage prevention curtain bottom line that meets the seepage prevention requirements is formed.

[0006] Furthermore, the geological parameters along the curtain axis at each station in the middle section, left abutment section, and right abutment section of the dam foundation include: dam height H, foundation surface J(x), relative impermeable layer curve L(x), weak weathering line of the rock mass R(x), and bottom line of the downstream riverbed D. river (x), rock mass permeability q, rock mass weathering degree, and fault fracture development.

[0007] Furthermore, in the geological condition quantification scoring table, the descriptions of rock permeability include: very low to weak permeability, moderate permeability, and very high permeability; the descriptions of rock weathering degree include: slightly weathered to fresh, weakly weathered, and strongly weathered; and the descriptions of fault and fracture development include: undeveloped, few fractures, single fault fracture zone, densely fractured zone, and densely fractured fault zone. For each condition description, including rock mass permeability score, rock mass weathering degree score, and fault fracture development, corresponding quantitative indicators are set and scored according to the actual situation.

[0008] Furthermore, based on the engineering geological survey, borehole water pressure test, geophysical test and geological logging results of the rock foundation, combined with the geological parameters of the middle section of the dam foundation, the left abutment section and the right abutment section, the rock permeability score, the rock weathering degree score and the fault fracture development score are scored; Add the scores of the rock mass permeability rate, the degree of rock mass weathering, and the score of the fault fracture development to obtain the total geological condition score S = S 岩体透水率 + S 岩体风化程度 + S 断层裂隙发育情况 ; Determine the geological condition index G, and set the judgment threshold S0 = 1.0; If S < S0, it is judged that the geological condition is good, and G = 0 is assigned; If S ≥ S0, it is judged that the geological condition is complex, and G = 1 is assigned.

[0009] Furthermore, for the left dam shoulder section and the right dam shoulder section, when the geological condition is good and G(x) = 0, the curtain bottom line is the function: D(x) = L(x) - 5, that is, the curtain bottom line of this dam section is a curve that penetrates 5 m below the impermeable layer and is parallel to the impermeable layer line; When the geological condition is complex and G(x) = 1, the curtain bottom line is the function: D(x) = min(L(x) - 5, R(x), J(x)-βH), that is, the curtain bottom line of this dam section is the lowest elevation curve of the intersection line of the curves L(x) - 5, R(x), J(x)-βH, where β is the dam height coefficient, and it takes values between 1 / 3 - 2 / 3 according to the importance of the project and the complexity of the geology.

[0010] Furthermore, for the middle section of the dam foundation, the middle section of the dam foundation is divided into several complex geological dam sections where G(x)=1 and good geological dam sections where G(x)=0; Carry out the judgment of the depth of the relatively impermeable layer for each divided dam section, and compare the relationship between max(J(x)-L(x)) and the dam height H: If max(J(x)-L(x)) > H, that is, the depth is greater than 1 times the dam height, it is considered that the bedrock impermeable layer is too deep, and enter the decision-making scenario of too deep impermeable layer, otherwise, enter the conventional depth decision-making scenario; In the above-mentioned conventional depth decision-making scenario, the method for determining the curtain bottom line includes: When G(x) = 0, the curtain bottom line is the function: D(x) = L(x) – 5; When G(x) = 1, determine a constant curtain bottom line for this area, D complex = min[ min(L(x)- 5), min(R(x)), min(J(x))-βH, min(D river (x))], where β is the dam height coefficient, and the value range is 1 / 3-2 / 3; In the decision-making scenario of too deep impermeable layer, the method for determining the curtain bottom line includes: When L(x) > H, determine a constant curtain bottom line for this region, and make the decision according to the following steps: Set an initial depth D initial =H, which is 1 times the dam height; With this D initial A seepage model for the dam foundation was established for calculation. If the total seepage of the dam foundation Q ≤ 0.03Q normal Q normal If the flow rate is the same as the river's normal flow rate, then it is considered minor leakage, and the bottom line of the curtain is D. deep =min(J(x))-D initial =min(J(x))-H; If Q > 0.03Q normal Q normal To determine the river's flow rate during the normal water period, let the curtain depth be H + n × 5, where n is the number of trial calculations. Repeat the seepage calculation until the nth time. final Once, Q≤0.03Q normal Then the bottom line of the curtain D deep =min(J(x))-(H+n final ×5).

[0011] Furthermore, in obtaining the baseline of the global seepage prevention curtain, the baseline D of the curtain in the complex geological zone within the middle section of the dam foundation will be determined. complex Or D deep The overall control baseline is determined. Based on the overall control baseline, the curtain baseline of the adjacent areas of the complex geological zone in the middle section of the dam foundation, the left abutment section and the right abutment section are connected by a broken line. The slope of the broken line is limited to not being steeper than 1:2. If the natural connection slope is steeper than this value, the curtain depth of the shallower section should be adjusted until the slope requirement is met, and finally a continuous and seepage-proof curtain baseline that meets the seepage prevention requirements is formed.

[0012] The second aspect of this application provides a system for determining the bottom line of a rock-based seepage barrier curtain based on geological zoning and multi-level decision-making, applicable to the aforementioned method for determining the bottom line of a rock-based seepage barrier curtain based on geological zoning and multi-level decision-making. The system includes a geological parameter acquisition module, a geological condition quantitative scoring table construction module, a geological condition judgment module, a curtain bottom line determination module for the left and right abutment sections, a curtain bottom line determination module for the middle section of the dam foundation, and a global seepage barrier curtain bottom line determination module.

[0013] The geological parameter acquisition module, based on the engineering geological survey data of the rock foundation, divides the dam foundation into the middle section, left abutment section, and right abutment section along the dam axis, and acquires the geological parameters of the middle section, left abutment section, and right abutment section.

[0014] The geological condition quantitative scoring table construction module constructs a geological condition quantitative scoring table based on the rock mass permeability, rock mass weathering degree, fault and fracture development and their corresponding condition descriptions and quantitative index scores.

[0015] The geological condition determination module, based on the engineering geological survey data of the rock foundation, borehole water pressure test, geophysical test and geological logging results, combined with the geological parameters of the middle section of the dam foundation, the left abutment section and the right abutment section, scores the geological conditions based on the geological condition quantitative scoring table and calculates the total geological condition score, and determines whether the geological conditions are good or complex by comparing them with the set judgment threshold.

[0016] The curtain bottom line determination module for the left and right abutment sections sets corresponding curtain bottom line functions for the left and right abutment sections based on the geological condition determination results, thereby obtaining the curtain bottom line for the left and right abutment sections.

[0017] The curtain bottom line determination module for the middle section of the dam foundation divides the middle section of the dam foundation into several complex geological dam sections and good geological dam sections based on the geological condition assessment results. It performs a relative impermeable layer depth assessment on each of the divided dam sections, distinguishes between two decision scenarios based on the assessment results: normal depth and excessively deep impermeable layer. It sets curtain bottom line functions for the two scenarios based on the geological condition assessment results, and finally integrates them to obtain the curtain bottom line of the middle section of the dam foundation.

[0018] The global anti-seepage curtain bottom line determination module determines the curtain bottom line of the complex geological area in the middle section of the dam foundation as the global control bottom line. Based on the global control bottom line, the adjacent areas of the complex geological area in the middle section of the dam foundation, the left dam abutment section and the right dam abutment section are connected by a broken line, and the slope of the broken line is limited to not being steeper than the preset limit, so as to finally form a continuous global anti-seepage curtain bottom line that meets the anti-seepage requirements.

[0019] A third aspect of this application provides an electronic device, characterized in that it includes: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to realize the method for determining the bottom line of the rock-based seepage prevention curtain based on geological zoning and multi-level decision-making as described above.

[0020] A fourth aspect of this application provides a computer-readable storage medium storing a computer program, characterized in that: when the computer program is executed by a processor, it implements the method for determining the bottom line of a rock-based seepage-proof curtain based on geological zoning and multi-level decision-making as described above.

[0021] Compared with the prior art, the present invention has the following advantages: (1) High scientificity and seepage prevention reliability: Traditional methods mainly rely on standard provisions and personal experience, especially lacking quantitative guidance under complex geological conditions; This invention transforms qualitative geological descriptions into calculable scores and thresholds by dividing the dam foundation into geological segments, constructing a quantitative scoring table for geological conditions, determining the curtain bottom line in segments, and dividing decision-making scenarios. It shifts the determination of the rock foundation seepage prevention curtain bottom line from experience to quantification, making the curtain bottom line determination process based on objective data. It systematically ensures that the curtain depth meets the key seepage safety requirements, avoids the "suspended curtain" caused by insufficient design from the root, and enhances the reliability of seepage prevention effect; (2) High reproducibility of results: Existing methods are highly subjective and vary from person to person, resulting in inconsistent design results; This invention standardizes the entire process of determining the bottom line of the rock foundation seepage prevention curtain into a scoring table and fixed steps based on quantifiable parameters, including geological segmentation of the dam foundation, scoring judgment, segment determination, segment decision-making, and setting the curtain bottom line function respectively; This enables different designers to obtain a unified and objective curtain bottom line based on the same set of survey data and rules, significantly reducing human arbitrariness and improving the quality consistency and reproducibility of design results; (3) Avoid resource waste: In response to the two extremes of "overly conservative" or "insufficient understanding" that are prone to occur in traditional methods, this invention performs targeted calculations on the curtain bottom line by dividing the geological segments and distinguishing between two decision scenarios: conventional depth and excessively deep impermeable layer. This ensures that the design of the curtain bottom line not only guarantees seepage safety but also avoids unnecessary excessive grouting. In the two decision scenarios of excessively deep impermeable layer, economic criteria can be introduced to reasonably optimize the curtain depth when there is slight leakage and automatically strengthen it when leakage does not meet the requirements, thereby achieving the optimal balance between safety and economy and minimizing the cost of the entire life cycle of the project. (4) Possessing dynamic adaptability and broad applicability: Traditional specifications have relatively vague principles for handling complex rock foundations such as strong weathering, faults, and karst; This invention, through geological segmentation of dam foundation, quantitative scoring of geological conditions, segmented determination of curtain bottom line, and division of decision-making scenarios, can dynamically select the optimal solution based on the specific geological parameters input; It is not only applicable to conventional geological conditions, but its inherent adaptive capability enables it to effectively cope with complex geological conditions that are difficult to handle precisely in the specifications, providing a unified, efficient, and highly reliable curtain bottom line determination solution for various dam types under diverse rock foundation conditions.

[0022] In summary, this invention transforms traditional experience-based qualitative design into a standardized process based on quantitative geological parameters. By segmenting, quantifying, and classifying the geological conditions of the dam site, and combining this with the depth of the impermeable layer to define different decision-making scenarios, a curtain bottom line function is specifically set, ultimately forming a continuous seepage barrier with complex geological zones as the control benchmark. This invention ensures safe and reliable seepage prevention while avoiding the drawbacks of "suspended curtains" or excessive grouting, significantly improving the objectivity, reproducibility, and economy of the design results, and dynamically adapting to various complex geological conditions. Attached Figure Description

[0023] Figure 1 This is a flowchart of the method of the present invention.

[0024] Figure 2 A flowchart for determining the curtain bottom line within a single dam section on the left and right abutments.

[0025] Figure 3 A three-level decision-making flowchart for determining the curtain bottom line within a single dam section in the middle section of the dam foundation.

[0026] Figure 4 A schematic diagram illustrating the determination of the curtain bottom depth for the zoned differentiation in Example 5.

[0027] Figure 5 This is a schematic diagram of the global curtain bottom line connection and optimization in Example 5. Detailed Implementation

[0028] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0029] Example 1 A method for determining the bottom line of a rock-based seepage-proof curtain based on geological zoning and multi-level decision-making, the flowchart of which is shown below. Figure 1 As shown, the specific steps are as follows.

[0030] Based on the engineering geological survey data of the rock foundation, the dam foundation is divided into the middle section, the left abutment section, and the right abutment section along the dam axis, and the geological parameters of the middle section, the left abutment section, and the right abutment section are obtained.

[0031] Specifically, the geological parameters at each station along the curtain axis in the middle section, left abutment section, and right abutment section of the dam foundation include: dam height H, foundation surface J(x), relative impermeable layer curve L(x), weak weathering line of the rock mass R(x), and bottom line of the downstream riverbed D. river (x), rock mass permeability q, rock mass weathering degree, and fault fracture development.

[0032] Based on the water permeability rate of rock mass, the degree of rock mass weathering, the development of fault fractures, and their corresponding condition descriptions and quantification index scores, a geological condition quantification scoring table is constructed.

[0033] Specifically, for the water permeability rate of rock mass, the corresponding condition descriptions include: extremely low - weak water permeability, medium water permeability, extremely strong water permeability; for the degree of rock mass weathering, the corresponding condition descriptions include: slightly weathered - fresh, weakly weathered, strongly weathered; for the development of fault fractures, the corresponding condition descriptions include: undeveloped, few fractures, single fault fracture zone, fracture - dense zone, fault fracture - dense zone; for each condition description of the scores of the water permeability rate of rock mass, the degree of rock mass weathering, and the development of fault fractures, corresponding quantification indexes are set according to the actual situation and scores are assigned to them.

[0034] Based on the engineering geological exploration data of the rock foundation, the water pressure test in boreholes, geophysical exploration tests, and geological logging results, combined with the geological parameters of the middle section, left abutment section, and right abutment section of the dam foundation, scoring is carried out based on the geological condition quantification scoring table and the total geological condition score is calculated, and the geological condition is judged to be good or complex by comparing with the set judgment threshold.

[0035] Specifically, based on the engineering geological exploration of the rock foundation, the water pressure test in boreholes, geophysical exploration tests, and geological logging results, combined with the geological parameters of the middle section, left abutment section, and right abutment section of the dam foundation, scores are given to the scores of the water permeability rate of rock mass, the degree of rock mass weathering, and the development of fault fractures; The scores of the water permeability rate of rock mass, the degree of rock mass weathering, and the development of fault fractures are added together to obtain the total geological condition score S = S 岩体透水率 + S 岩体风化程度 + S 断层裂隙发育情况 ; Determine the geological condition index G, and set the judgment threshold S0 = 1.0; If S < S0, it is judged that the geological condition is good, and G = 0 is assigned; If S ≥ S0, it is judged that the geological condition is complex, and G = 1 is assigned.

[0036] In practical applications, the geological condition quantification scoring table is shown in Table 1. As a multi - factor scoring system, the geological condition quantification scoring table realizes the objective quantification and automatic scoring of geological conditions. This system selects three key geological factors that have the most direct impact on the anti - seepage effect of the curtain for quantitative evaluation, calculates the total geological condition score S, and finally determines the index by comparing with the judgment threshold S0.

[0037] Table 1 Geological Condition Quantification Scoring Table Based on the geological condition assessment results, corresponding curtain bottom line functions were set for the left and right abutment sections to obtain the curtain bottom line for the left and right abutment sections.

[0038] Figure 2 The flowchart for determining the curtain bottom line within a single dam section on the left and right abutments is as follows: When the geological conditions are good and G(x) = 0, the curtain bottom line is a function: D(x) = L(x) - 5, that is, the curtain bottom line of this dam section is a curve that penetrates 5m below the impermeable layer and is parallel to the impermeable layer line; When the geological conditions are complex and G(x) = 1, the curtain bottom line is a function: D(x) = min(L(x) - 5, R(x), J(x)-βH), that is, the curtain bottom line of this dam section is the lowest elevation curve of the intersection of each curve L(x) - 5, R(x), J(x)-βH, where β is the dam height coefficient, which is taken between 1 / 3 and 2 / 3 according to the importance of the project and the degree of geological complexity, and is generally taken as 1 / 2.

[0039] For the middle section of the dam foundation, based on the geological condition assessment results, it is divided into several complex geological dam sections and good geological dam sections. The relative impermeable layer depth is judged for each of the divided dam sections. Based on the judgment results, two decision scenarios are distinguished: normal depth and excessively deep impermeable layer. The curtain bottom line function is set for the two scenarios in combination with the decision scenario and the geological condition assessment results. Finally, the curtain bottom line of the middle section of the dam foundation is obtained by integration.

[0040] Figure 3 The three-level decision-making flowchart for determining the bottom line of the curtain wall within a single dam section in the middle section of the dam foundation is as follows: The middle section of the dam foundation is divided into several complex geological dam sections, i.e., regions with G(x)=1, and good geological dam sections, i.e., regions with G(x)=0. For each dam section, the relative impermeable layer depth is judged by comparing the relationship between max(J(x)-L(x)) and dam height H: if max(J(x)-L(x))>H, that is, the depth is greater than 1 times the dam height, it is considered that the bedrock impermeable layer is too deep and enters the decision scenario of excessive impermeable layer; otherwise, it enters the conventional depth decision scenario.

[0041] In typical deep decision-making scenarios, methods for determining the veil bottom line include: When G(x) = 0, the bottom line of the curtain is a function: D(x) = L(x) – 5; When G(x) = 1, a constant curtain bottom line is determined for this region, D. complex= min[ min(L(x)- 5), min(R(x)), min(J(x))-βH,min(D river (x))], where β is the dam height coefficient, and its value ranges from 1 / 3 to 2 / 3; This depth ensures that the curtain can penetrate into the impermeable layer and weakly weathered rock mass within the area, meet the dam height ratio requirements, and remain below the downstream riverbed throughout, thus avoiding the formation of a suspended curtain.

[0042] In the decision-making scenario where the impermeable layer is too deep, the method for determining the bottom line of the curtain includes: When L(x) > H, determine a constant curtain bottom line for this region, and make the decision according to the following steps: Set an initial depth D initial =H, which is 1 times the dam height; With this D initial A seepage model for the dam foundation was established for calculation. If the total seepage of the dam foundation Q ≤ 0.03Q normal Q normal If the flow rate is the same as the river's normal flow rate, then it is considered minor leakage, and the bottom line of the curtain is D. deep =min(J(x))-D initial =min(J(x))-H; If Q > 0.03Q normal Q normal To determine the river's flow rate during the normal water period, let the curtain depth be H + n × 5, where n is the number of trial calculations. Repeat the seepage calculation until the nth time. final Once, Q≤0.03Q normal Then the bottom line of the curtain D deep =min(J(x))-(H+n final ×5).

[0043] In the above content, especially when the impermeable layer is too deep, the innovative introduction of "total leakage ≤ 0.303 river flow during normal water period" as an economic criterion allows for reasonable optimization of the depth to save costs when leakage is slight, and automatic reinforcement of the curtain when leakage does not meet the requirement.

[0044] The curtain bottom line of the complex geological zone in the middle section of the dam foundation is determined as the global control bottom line. Based on the global control bottom line, the curtain bottom lines of the adjacent areas of the complex geological zone in the middle section of the dam foundation, the left abutment section and the right abutment section are connected by a broken line. The slope of the broken line is limited to not be steeper than the preset limit, and finally a continuous global seepage prevention curtain bottom line that meets the seepage prevention requirements is formed.

[0045] Specifically, the curtain bottom line D of the complex geological zone in the middle section of the dam foundation will be... complex Or D deepThe overall control baseline is determined. Based on this baseline, a broken line is used to connect adjacent areas in the complex geological zone of the middle section of the dam foundation, the left abutment section, and the right abutment section, forming the curtain baseline. The slope of this broken line is limited to no more than 1:2. If the natural connection slope is steeper than this value, the curtain depth of the shallower section should be adjusted until the slope requirement is met. This ensures a smooth and reasonable transition of the entire seepage prevention curtain baseline from the deepest to the shallowest area, ultimately forming a continuous and seepage-proof overall seepage prevention curtain baseline. Through the above process, this embodiment ultimately outputs a global seepage prevention curtain bottom line with scientific depth variation on the longitudinal section, smooth spatial connection, and the best seepage prevention effect and construction feasibility.

[0046] Example 2 The rock foundation seepage prevention curtain baseline determination system based on geological zoning and multi-level decision-making consists of a geological parameter acquisition module, a geological condition quantitative scoring table construction module, a geological condition judgment module, a curtain baseline determination module for the left and right abutment sections, a curtain baseline determination module for the middle section of the dam foundation, and a global seepage prevention curtain baseline determination module.

[0047] The geological parameter acquisition module, based on the engineering geological survey data of the rock foundation, divides the dam foundation into the middle section, left abutment section, and right abutment section along the dam axis, and acquires the geological parameters of the middle section, left abutment section, and right abutment section.

[0048] The geological condition quantitative scoring table construction module constructs a geological condition quantitative scoring table based on the rock mass permeability, rock mass weathering degree, fault and fracture development and their corresponding condition descriptions and quantitative index scores.

[0049] The geological condition assessment module, based on the engineering geological survey data of the rock foundation, borehole water pressure test, geophysical test and geological logging results, combined with the geological parameters of the middle section of the dam foundation, the left abutment section and the right abutment section, scores the geological conditions based on the geological condition quantitative scoring table and calculates the total geological condition score. It then determines whether the geological conditions are good or complex by comparing them with the set judgment threshold.

[0050] The curtain bottom line determination module for the left and right abutment sections sets corresponding curtain bottom line functions based on the geological condition judgment results for the left and right abutment sections, thereby obtaining the curtain bottom line for the left and right abutment sections.

[0051] The curtain bottom line determination module for the middle section of the dam foundation divides the middle section of the dam foundation into several complex geological dam sections and good geological dam sections based on the geological condition assessment results. It conducts a relative impermeable layer depth assessment for each dam section and distinguishes between two decision scenarios based on the assessment results: normal depth and excessively deep impermeable layer. It sets curtain bottom line functions for the two scenarios based on the geological condition assessment results and finally integrates them to obtain the curtain bottom line of the middle section of the dam foundation.

[0052] The global anti-seepage curtain baseline determination module defines the curtain baseline of the complex geological area in the middle section of the dam foundation as the global control baseline. Based on the global control baseline, the adjacent areas of the complex geological area in the middle section of the dam foundation, the left dam abutment section and the right dam abutment section are connected by a broken line, and the slope of the broken line is limited to not being steeper than the preset limit, so as to form a continuous global anti-seepage curtain baseline that meets the anti-seepage requirements.

[0053] The specific implementation methods of each module in this system are the same as those described in Example 1, and will not be repeated here.

[0054] Example 3 An electronic device includes a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to implement the rock-based seepage prevention curtain baseline determination method based on geological zoning and multi-level decision-making as described in Embodiment 1 above, and the rock-based seepage prevention curtain baseline determination system based on geological zoning and multi-level decision-making as described in Embodiment 2.

[0055] Example 4 A computer-readable storage medium storing a computer program that, when executed by a processor, implements the method for determining the bottom line of a rock-based seepage-proof curtain based on geological zoning and multi-level decision-making as described in Embodiment 1 above, and the system for determining the bottom line of a rock-based seepage-proof curtain based on geological zoning and multi-level decision-making as described in Embodiment 2.

[0056] Example 5 Taking a clay core dam of a certain water conservancy project as an example, the project is classified as Class II and the project scale is large (2). The dam crest elevation is 127.8m, the maximum dam height is 36m, and the dam axis length is 110m.

[0057] According to the engineering geological survey report, the rock mass conditions of the dam foundation and abutments vary significantly along the dam axis. Analysis shows that the lithology of the dam foundation is mainly silty claystone and claystone. The right bank rock mass is intact with no adverse geological conditions. The rock mass in the middle section of the dam foundation has poor integrity, with a thickness of 3-20m of strongly weathered rock mass, and the rock mass is fractured. The rock mass at the bedrock contact point is generally fractured, with strong weathering and high permeability. The rock mass between the middle section of the dam foundation and the strongly weathered bedrock is fractured, with a permeability of 18.1Lu-25.0Lu, classifying it as a medium permeability layer. The left bank has numerous small faults and long fissures, with the top strongly weathered rock layer having a permeability of 13.9Lu, also classifying it as a medium permeability layer.

[0058] Step 1: Dam foundation seepage prevention segmentation and parameter acquisition like Figure 1As shown, the dam foundation seepage prevention is first divided into sections: Based on geological conditions and specifications, the area to be grouted with curtain grouting is from chainage 0-141 to 0+207. The dam foundation is divided into three sections with relatively uniform engineering geological conditions along the dam axis, namely, section 1 (chainage 0-141 to 0+027), section 2 (chainage 0+027 to 0+090), and section 3 (chainage 0+090 to 0+207), namely the right abutment section, the middle section of the dam foundation, and the left abutment section.

[0059] Representative geological parameters for each dam section were obtained through geological exploration, drilling, water pressure testing, and topographic surveying, as detailed in Table 2. The geological condition quantification scoring table is shown in Table 1 above. The relative impermeability layer curve L(x) and the weak weathering line R(x) of the rock mass are shown in... Figure 4 .

[0060] Table 2 Summary of Geological Parameters for Each Dam Section The second step involves determining the baseline for the secondary decision-making process at the dam abutment section. like Figure 2 As shown, the geological conditions are identified and the geological condition index G is calculated: Dam section #1 (right abutment): S=0+0.3+0.2=0.5, therefore G=0, the geological conditions are good; Dam section #3 (left abutment): S=0.4+0.3+0.4=1.0, therefore G=1, the geological conditions are complex.

[0061] Curtain depth determined: Dam Section 1 (Right Abutment): The curtain bottom line is a function: D(x) = L(x) - 5, meaning the curtain bottom line of this dam section is a curve extending 5m below the impermeable layer and parallel to the impermeable layer line, such as... Figure 4 As shown in the center line 1#-1.

[0062] Dam Section 3 (Left Bank): The curtain bottom line is a function: D(x) = min(L(x) - 5, R(x), J(x)-βH), where β = 2 / 3, then βH = 24m. Since in the section from chainage 0+113 to 0+207, the relative impermeable layer curve and the top line of the weakly weathered rock mass are negative values ​​higher than the foundation surface, D(x) is calculated to be 130-24 = 106. This means the curtain bottom line of this dam section is a parallel line 24m below the 130m elevation of the foundation surface. In the section from chainage 0+090 to 0+113, the curve corresponding to function L(x) - 5 has the lowest elevation; therefore, the curtain bottom line of this section is a curve extending 5m below the impermeable layer and parallel to the impermeable layer line. See below for details. Figure 4 As shown in the middle lines 3#-1 and 3#-2.

[0063] The third step involves determining the curtain line bottom line through a three-level decision-making process for the middle section of the dam foundation. like Figure 3 As shown, geological units are divided and geological conditions are determined: based on the results of the geological condition determination, the dam is divided into several complex geological dam sections and good geological dam sections. Each dam section is called a geological unit; among them, dam section #2 (middle section of dam foundation): S=0.6+0.3+0.4=1.2, so G=1, and the geological conditions are complex.

[0064] Determining whether the relatively impermeable layer is too deep: The maximum value of J(x)-L(x) is 28m < H=36m, which belongs to the normal depth decision-making scenario.

[0065] In typical deep decision-making scenarios, when G(x) = 1, a constant veil baseline is defined for the region, D. complex = min[ min(L(x) - 5), min(R(x)), J(x)-βH,min(D river (x))], where β = 2 / 3, then βH = 24m.

[0066] Calculate the minimum value of each parameter: min(L(x) - 5) = 83m; min(R(x)) = 88m; min(J(x)-βH)=94-24=70m; min(D river (x))=72m; Therefore, D complex = min[ 83,88,70,72]=70m, which satisfies the requirement of "below the riverbed". Therefore, the bottom line of the curtain wall in the middle section of the dam foundation is a straight line at an elevation of 70m. Figure 4 As shown in the middle line 2#-1.

[0067] Step 4: Global Curtain Bottom Line Connection and Optimization Determine the control baseline: This includes defining the D-level control baseline for complex geological zones within the riverbed section. complex The bottom line for overall control is defined as the 70m elevation line, with endpoints at chainages 0+027 and 0+090.

[0068] Bottom line connection and slope control: Section 2 to Section 1: Starting from the 70m elevation point at chainage 0+027 in the riverbed section, the slope is raised to the left abutment at a gradient of 1:2.0 until it intersects with the curtain bottom line of Section 1 at chainage 0-030, taking the deeper curtain bottom line.

[0069] Section 2 to Section 3: Starting from the 70m elevation point at chainage 0+090 within the riverbed section, the slope begins at a 1:2.0 gradient towards the right abutment until it intersects with the curtain bottom line of Section 3 at chainage 0+162, where the deeper curtain bottom line is taken.

[0070] Through the above-mentioned curtain bottom line connection and optimization, a final continuous global seepage prevention curtain bottom line that meets the seepage prevention requirements is output, such as... Figure 5 As shown.

[0071] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of this application can be implemented in various computer languages, such as object-oriented programming languages ​​like Java, C++, Python, and interpreted scripting languages ​​like JavaScript.

[0072] This application is described with reference to flowchart illustrations and / or block diagrams of methods, electronic devices (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing electronic device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing electronic device, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0073] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing electronic device to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0074] These computer program instructions can also be loaded onto a computer or other programmable data processing electronic device to cause a series of operational steps to be performed on the computer or other programmable electronic device to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable electronic device for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0075] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0076] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A method for determining the bottom line of a rock-based seepage-proof curtain based on geological zoning and multi-level decision-making, characterized in that, Including: Based on the engineering geological exploration data of the rock foundation, the dam foundation is divided into the middle section of the dam foundation, the left abutment section, and the right abutment section along the dam axis, and the geological parameters in the middle section of the dam foundation, the left abutment section, and the right abutment section are obtained; Based on the rock mass permeability rate of the rock foundation, the degree of rock mass weathering, the development of fault fractures and their corresponding condition descriptions and quantification index scores, a geological condition quantification scoring table is constructed; According to the engineering geological exploration data of the rock foundation, the results of the pumping water test in boreholes, geophysical exploration tests and geological logging, combined with the geological parameters in the middle section of the dam foundation, the left abutment section, and the right abutment section, scoring is carried out based on the geological condition quantification scoring table and the total score of the geological conditions is calculated, and the geological conditions are judged to be good or complex by comparing with the set judgment threshold; For the left abutment section and the right abutment section, based on the geological condition judgment results, the corresponding curtain bottom line functions are set respectively to obtain the curtain bottom lines of the left abutment section and the right abutment section; For the middle section of the dam foundation, it is divided into several complex geological dam sections and good geological dam sections based on the geological condition judgment results; the relative impervious layer depth judgment is carried out on each divided dam section, and according to the judgment results, two decision scenarios of normal depth and too deep impervious layer are distinguished. Combining the decision scenarios and the geological condition judgment results, the curtain bottom line functions under the two scenarios are set respectively, and finally the curtain bottom line of the middle section of the dam foundation is integrated; The curtain bottom line in the complex geological area in the middle section of the dam foundation is determined as the global control bottom line. Based on the global control bottom line, the curtain bottom lines of the adjacent areas in the complex geological area of the middle section of the dam foundation, the left abutment section, and the right abutment section are connected by broken lines, and it is stipulated that the slope of the broken line shall not be steeper than the preset limit value, and finally a continuous global anti-seepage curtain bottom line that meets the anti-seepage requirements is formed.

2. The method for determining the bottom line of a rock-based seepage-proof curtain based on geological zoning and multi-level decision-making as described in claim 1, characterized in that: The geological parameters of the middle section, left abutment section, and right abutment section of the dam foundation include: dam height H, foundation surface J(x), relative impermeable layer curve L(x), weak weathering line of the rock mass R(x), and bottom line of the downstream riverbed D. river (x), rock mass permeability q, rock mass weathering degree, and fault fracture development.

3. The method for determining the bottom line of a rock-based seepage-proof curtain based on geological zoning and multi-level decision-making as described in claim 2, characterized in that: In the geological condition quantification scoring table, for the rock mass permeability rate, the corresponding condition descriptions include: extremely slight - weak permeability, medium permeability, extremely strong permeability; for the degree of rock mass weathering, the corresponding condition descriptions include: slightly weathered - fresh, weakly weathered, strongly weathered; for the development of fault fractures, the corresponding condition descriptions include: undeveloped, few fractures, single fault fracture zone, fracture dense zone, fault fracture dense zone; For each condition description of the rock mass permeability rate score, the degree of rock mass weathering score, and the development of fault fractures, the corresponding quantification indexes are set according to the actual situation and scores are assigned to them.

4. The method for determining the bottom line of a rock-based seepage-proof curtain based on geological zoning and multi-level decision-making as described in claim 3, characterized in that: According to the engineering geological exploration, pumping water test in boreholes, geophysical exploration tests and geological logging results of the rock foundation, combined with the geological parameters of the middle section of the dam foundation, the left abutment section, and the right abutment section, scores are given to the rock mass permeability rate score, the degree of rock mass weathering score, and the development of fault fractures; The scores for rock mass permeability, rock mass weathering degree, and fault fracture development are added together to obtain the total geological condition score S = S0. 岩体透水率 +S 岩体风化程度 +S 断层裂隙发育情况 ; Determine the geological condition index G, and set the judgment threshold S0 = 1.0; If S < S0, it is judged that the geological condition is good, and G = 0 is assigned; If S ≥ S0, it is judged that the geological condition is complex, and G = 1 is assigned.

5. The method for determining the bottom line of a rock-based seepage-proof curtain based on geological zoning and multi-level decision-making as described in claim 4, characterized in that: For the left abutment section and the right abutment section, when the geological condition is good and G(x) = 0, the curtain bottom line is the function: D(x)= L(x) - 5, that is, the curtain bottom line of this dam section is a curve that penetrates 5m below the impervious layer and is parallel to the impervious layer line; When the geological conditions are complex and G(x) = 1, the curtain bottom line is a function: D(x) = min(L(x) - 5, R(x), J(x)-βH), that is, the curtain bottom line of this dam section is the lowest elevation curve of the intersection of each curve L(x) - 5, R(x), J(x)-βH, where β is the dam height coefficient, which is taken between 1 / 3 and 2 / 3 depending on the importance of the project and the degree of geological complexity.

6. The method for determining the bottom line of a rock-based seepage-proof curtain based on geological zoning and multi-level decision-making as described in claim 5, characterized in that: For the middle section of the dam foundation, the middle section of the dam foundation is divided into several complex geological dam sections, i.e. regions with G(x)=1 and good geological dam sections, i.e. regions with G(x)=0. For each dam section, the relative impermeable layer depth is judged, and the relationship between max(J(x)-L(x)) and dam height H is compared: if max(J(x)-L(x))>H, that is, the depth is greater than 1 times the dam height, it is considered that the bedrock impermeable layer is too deep, and the decision scenario for the impermeable layer is too deep is entered; otherwise, the decision scenario for the conventional depth is entered. In the aforementioned conventional deep decision-making scenarios, the methods for determining the curtain bottom line include: When G(x) = 0, the bottom line of the curtain is a function: D(x) = L(x) – 5; When G(x) = 1, a constant curtain bottom line is determined for this region, D. complex = min[ min(L(x) - 5),min(R(x)), min(J(x))-βH,min(D river (x))], where β is the dam height coefficient, and its value ranges from 1 / 3 to 2 / 3; In the decision-making scenario where the impermeable layer is too deep, the method for determining the bottom line of the curtain includes: When L(x) > H, determine a constant veil bottom line for this region, and make the decision according to the following steps: Set an initial depth D initial =H, which is 1 times the dam height; With this D initial A seepage model for the dam foundation was established for calculation. If the total seepage of the dam foundation Q ≤ 0.03Q normal Q normal If the flow rate is the same as the river's normal flow rate, then it is considered minor leakage, and the bottom line of the curtain is D. deep =min(J(x))-D initial =min(J(x))-H; If Q > 0.03Q normal Q normal Given the river's flow rate during the normal water period, let the curtain depth be H + n × 5, where n is the number of trial calculations. Repeat the seepage calculation until the nth time. final Once, Q≤0.03Q normal Then the bottom line of the curtain D deep =min(J(x))-(H+n final ×5).

7. The method for determining the bottom line of a rock-based seepage-proof curtain based on geological zoning and multi-level decision-making as described in claim 6, characterized in that: In obtaining the baseline of the global seepage prevention curtain, the baseline D of the curtain in the complex geological zone within the middle section of the dam foundation is determined. complex Or D deep The overall control baseline is determined. Based on the overall control baseline, the curtain baseline of the adjacent areas of the complex geological zone in the middle section of the dam foundation, the left abutment section and the right abutment section are connected by a broken line. The slope of the broken line is limited to not being steeper than 1:

2. If the natural connection slope is steeper than this value, the curtain depth of the shallower section should be adjusted until the slope requirement is met, and finally a continuous and seepage-proof curtain baseline that meets the seepage prevention requirements is formed.

8. A system for determining the bottom line of a rock-based seepage-proof curtain based on geological zoning and multi-level decision-making, applicable to the method for determining the bottom line of a rock-based seepage-proof curtain based on geological zoning and multi-level decision-making as described in any one of claims 1-7, characterized in that: It includes a geological parameter acquisition module, a geological condition quantitative scoring table construction module, a geological condition judgment module, a curtain bottom line determination module for the left and right abutment sections, a curtain bottom line determination module for the middle section of the dam foundation, and a global anti-seepage curtain bottom line determination module. The geological parameter acquisition module, based on the engineering geological survey data of the rock foundation, divides the dam foundation into the middle section, left abutment section, and right abutment section along the dam axis, and acquires the geological parameters of the middle section, left abutment section, and right abutment section. The geological condition quantitative scoring table construction module constructs a geological condition quantitative scoring table based on the rock mass permeability, rock mass weathering degree, fault and fracture development and their corresponding condition descriptions and quantitative index scores. The geological condition determination module, based on the engineering geological survey data of the rock foundation, borehole water pressure test, geophysical test and geological logging results, combined with the geological parameters of the middle section of the dam foundation, the left abutment section and the right abutment section, scores the geological conditions based on the geological condition quantitative scoring table and calculates the total geological condition score, and determines whether the geological conditions are good or complex by comparing with the set judgment threshold. The curtain bottom line determination module for the left and right abutment sections sets corresponding curtain bottom line functions for the left and right abutment sections based on the geological condition determination results, and obtains the curtain bottom line for the left and right abutment sections respectively. The curtain bottom line determination module for the middle section of the dam foundation divides the middle section of the dam foundation into several complex geological dam sections and good geological dam sections based on the geological condition assessment results. It performs a relative impermeable layer depth assessment on each of the divided dam sections, distinguishes between two decision scenarios based on the assessment results: normal depth and excessively deep impermeable layer. It sets curtain bottom line functions for the two scenarios based on the geological condition assessment results, and finally integrates them to obtain the curtain bottom line of the middle section of the dam foundation. The global anti-seepage curtain bottom line determination module determines the curtain bottom line of the complex geological area in the middle section of the dam foundation as the global control bottom line. Based on the global control bottom line, the adjacent areas of the complex geological area in the middle section of the dam foundation, the left dam abutment section and the right dam abutment section are connected by a broken line, and the slope of the broken line is limited to not being steeper than the preset limit, so as to finally form a continuous global anti-seepage curtain bottom line that meets the anti-seepage requirements.

9. An electronic device, characterized in that, include: The system includes a memory and a processor, which are interconnected. The memory stores computer instructions, and the processor executes these computer instructions to implement the method for determining the bottom line of a rock-based seepage-proof curtain based on geological zoning and multi-level decision-making, as described in any one of claims 1-7.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by the processor, it implements the method for determining the bottom line of the rock-based seepage-proof curtain based on geological zoning and multi-level decision-making as described in any one of claims 1-7.

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