An underground continuous wall construction mud on-line monitoring method, system and device

Abstract

This invention provides a method, system, and device for online monitoring of construction mud in diaphragm wall construction, relating to the field of construction mud monitoring technology. The method includes responding to excavation commands, determining soil layer information corresponding to the excavation depth, and determining a control threshold below the soil layer elevation. During excavation, the density, viscosity, and pH values ​​of the circulating mud in the trench section are collected in real time. These values ​​are compared with the control threshold, and a corresponding graded control strategy is executed based on the comparison results. The process then jumps to the step of collecting the density, viscosity, and pH values ​​of the circulating mud in the trench section in real time during excavation, until all trench sections are completed. This invention solves the problem that existing technologies cannot meet the timeliness and accuracy requirements of dynamic control of mud performance in ultra-deep diaphragm wall construction, improving the timeliness, completeness, and accuracy of monitoring data to meet the precise mud control needs under complex geological conditions of ultra-deep diaphragm walls.

Description

Technical Field

[0001] This invention relates to the field of construction mud monitoring technology, and in particular to an online monitoring method, system and device for construction mud in diaphragm walls. Background Technology

[0002] Diaphragm walls, as an important structural form in deep foundation engineering, are widely used in the construction of projects under complex geological conditions such as urban subways, ultra-deep foundation pits, and water conservancy projects. Their construction quality directly affects the safety and durability of the engineering structure. During diaphragm wall construction, the mud system plays a crucial role in maintaining trench wall stability, suspending sediment, and cooling drilling tools. The quality of the mud is one of the core factors affecting trenching quality and construction safety. As diaphragm walls develop towards ultra-deep directions (e.g., depths exceeding 75 meters), the construction environment becomes increasingly complex, placing higher demands on the precision and response speed of mud performance control.

[0003] Currently, the monitoring of slurry properties during diaphragm wall construction mainly relies on two methods: one is traditional manual sampling and testing, which uses tools such as slurry hydrometers, funnel viscometers, and pH test paper to measure density, viscosity, and pH value respectively; the other is some online monitoring devices, which can achieve online acquisition of single indicators such as density or viscosity, or achieve multiple tests such as specific gravity, viscosity, and sand content through integrated systems.

[0004] However, existing mud monitoring technologies have the following shortcomings in practical applications: First, the monitoring indicators are not comprehensive, especially lacking online monitoring of pH values, which fails to fully reflect the wall-protecting performance and stability of the mud. Second, traditional manual testing and some integrated devices suffer from data lag, cumbersome operation, and poor synchronization, making it difficult to meet the timeliness and accuracy requirements of dynamic control of mud performance in ultra-deep diaphragm wall construction. Third, existing technologies mostly employ intermittent testing or single-indicator control, failing to achieve simultaneous collection and correlation analysis of the three core indicators, making it difficult to support intelligent control of mud performance under complex geological conditions. Therefore, these shortcomings will fail to meet the timeliness and accuracy requirements of dynamic control of mud performance in ultra-deep diaphragm wall construction, making it difficult to guarantee the safety and quality of ultra-deep diaphragm wall construction. Summary of the Invention

[0005] To address the aforementioned shortcomings in existing technologies, the present invention aims to provide an online monitoring method for slurry during the construction of diaphragm walls. This method improves the timeliness, completeness, and accuracy of monitoring data, thereby meeting the precise slurry control requirements under complex geological conditions in ultra-deep diaphragm walls.

[0006] The above-mentioned objective of this invention is achieved through the following technical solution: A method for online monitoring of slurry during diaphragm wall construction includes: Responding to the trenching machine's excavation command, determine the soil layer information corresponding to the excavation depth; Based on the soil layer information, determine the control threshold at the corresponding elevation of the soil layer; During the trenching process, the density, viscosity, and pH values ​​of the circulating mud in the trench section are collected in real time. The density value, viscosity value, and pH value are compared with the control threshold, respectively. Based on the comparison results, the corresponding graded control strategy is executed, and the process jumps to the step of collecting the density, viscosity and pH values ​​of the circulating mud in the trench section in real time during the trenching process of the milling machine, until the construction of all trench sections is completed.

[0007] By adopting the above technical solution, the control threshold of the corresponding soil layer is dynamically matched according to the excavation depth of the trenching machine, thus achieving precise adaptation of mud performance control to geological conditions. At the same time, by collecting three core indicators—density, viscosity, and pH—in real time and comparing them with the thresholds, the mud state is determined in a timely manner and differentiated control strategies are implemented. During the implementation of the strategy, density, viscosity, and pH are continuously collected and compared until the construction of all trench sections is completed. This effectively improves the timeliness and accuracy of mud performance control, providing a reliable guarantee for the trenching quality of ultra-deep underground continuous walls under complex geological conditions.

[0008] Preferably, the step of responding to the trenching machine's excavation command and determining the soil layer information corresponding to the excavation depth includes: The trenching machine's digging command is parsed to obtain the depth data field; The depth value in the depth data field is matched with the preset geological stratification data to determine the soil layer information corresponding to the current excavation depth.

[0009] By adopting the above technical solution, the current excavation depth of the trenching machine can be automatically identified and the corresponding soil layer information can be accurately matched, avoiding the lag or mismatch in mud performance control caused by changes in soil layers, and improving the geological adaptability of mud monitoring and control.

[0010] Preferably, the control thresholds include a density control threshold, a viscosity control threshold, and a pH control threshold. The density control threshold includes a first density threshold and a second density threshold. The viscosity control threshold includes a first viscosity threshold and a second viscosity threshold. The pH control threshold includes a first pH threshold, a second pH threshold, and a third pH threshold. The step of comparing the density value, the viscosity value, and the pH value with the control thresholds includes: The density value is compared with the first density threshold and the second density threshold respectively; When the density value is less than or equal to the first density threshold, it is determined to be in a qualified state; When the density value is greater than the first density threshold and less than the second density threshold, it is determined to be a critical state; When the density value is greater than or equal to the second density threshold, it is determined to be in a deteriorated state; The viscosity value is compared with the first viscosity threshold and the second viscosity threshold, respectively; When the viscosity value is less than or equal to the first viscosity threshold, it is determined to be in a qualified state; When the viscosity value is greater than the first viscosity threshold and less than the second viscosity threshold, it is determined to be a critical state; When the viscosity value is greater than or equal to the second viscosity threshold, it is determined to be in a deteriorated state; The pH value is compared with the first pH threshold, the second pH threshold, and the third pH threshold, respectively. When the pH value is greater than or equal to the second pH threshold and less than or equal to the third pH threshold, it is determined to be in a qualified state; When the pH value is greater than or equal to the first pH threshold and less than the second pH threshold, it is determined to be a critical state. When the pH value is less than the first pH threshold or greater than the third pH threshold, it is determined to be in a deteriorated state.

[0011] By adopting the above technical solution, multiple thresholds are set for the three indicators of density, viscosity and pH, and graded judgment is made. This can accurately identify the three states of mud performance: qualified, critical and deteriorated. It can effectively avoid misjudgment or untimely response caused by single threshold judgment, and improve the accuracy of mud performance assessment and the level of precision of control.

[0012] Preferably, the step of executing the corresponding graded control strategy based on the comparison result includes: When the density value, viscosity value, and pH value are all deemed acceptable, a recycling strategy is implemented. When any one of the density value, viscosity value, or pH value is determined to be in a deteriorated state, a waste disposal strategy is implemented. When the determination results of the density value, the viscosity value, and the pH value are all not in a deteriorated state, and at least one determination result is in a critical state, the performance adjustment strategy is executed.

[0013] By adopting the above technical solution, three differentiated control strategies—recycling, performance adjustment, or disposal—are automatically matched based on the grading results of the three indicators. This achieves precise classification and disposal of mud performance, avoiding the waste of qualified mud, and enabling timely intervention when performance is critical and decisive disposal when it deteriorates. This effectively ensures the stability and reliability of mud performance during the construction of ultra-deep underground continuous walls.

[0014] Preferably, the performance tuning strategy is as follows: The deviation is determined based on the difference between the density value, the viscosity value, or the pH value and the corresponding control threshold. Based on the aforementioned deviation, instructions are generated to open the fresh mud pipeline and inject new or regenerated mud for blending and adjustment.

[0015] By adopting the above technical solution, the injection requirements of new or recycled mud are quantitatively determined based on the deviation between the monitored value and the control threshold, thereby achieving fine adjustment of mud performance and avoiding the problems of over-supply or under-adjustment. While ensuring that the mud performance is quickly restored to the qualified range, the consumption cost of mud materials is effectively reduced.

[0016] The second objective of this invention is to provide an online monitoring system for slurry during the construction of diaphragm walls, which improves the timeliness, completeness, and accuracy of monitoring data to meet the precise slurry control requirements under complex geological conditions of ultra-deep diaphragm walls.

[0017] The second objective of this invention is achieved through the following technical solution: An online monitoring system for slurry during diaphragm wall construction includes: The information determination module is used to respond to the trenching machine's excavation command and determine the soil layer information corresponding to the excavation depth; The threshold determination module is used to determine the control threshold at the corresponding elevation of the soil layer based on the soil layer information. The data acquisition module is used to collect the density, viscosity and pH values ​​of the circulating mud in the trench section in real time during the trenching process of the trenching machine. The data comparison module is used to compare the density value, the viscosity value, and the pH value with the control threshold, respectively. The strategy control module is used to execute the corresponding hierarchical control strategy according to the comparison results, and jump to the step of collecting the density, viscosity and pH values ​​of the circulating mud in the trench section in real time during the trenching process of the milling machine, until the construction of all trench sections is completed.

[0018] By adopting the above technical solution, each module has a clear division of labor and smooth data flow, which can automatically respond to the excavation process of the trenching machine and continuously complete the dynamic monitoring and control of mud performance, providing an efficient and reliable intelligent monitoring solution for the construction of ultra-deep underground continuous walls.

[0019] The third objective of this invention is to provide an online monitoring device for slurry during the construction of underground continuous walls, which improves the timeliness, completeness, and accuracy of monitoring data to meet the precise slurry control requirements under complex geological conditions of ultra-deep underground walls.

[0020] The above-mentioned objective three of this invention is achieved through the following technical solution: An online monitoring device for slurry during diaphragm wall construction includes: The online monitoring system for slurry during the construction of underground continuous wall as described in Purpose 2 of the invention; The detection device includes a pipeline body, a mud conveying assembly, and a monitoring assembly. The mud conveying assembly and the monitoring assembly are mounted on the pipeline body and are connected to each other. The mud conveying assembly includes a filter screen, an electric diaphragm pump, and a pulse damper. The filter screen is located at the inlet of the pipeline body, the outlet of the filter screen is connected to the inlet of the electric diaphragm pump, and the outlet of the electric diaphragm pump is connected to the inlet of the pulse damper. The monitoring components include a pH detector, a densitometer, and a U-tube online viscosity detection unit. The inlet of the pH detector is connected to the outlet of the pulse damper, the outlet of the pH detector is connected to the inlet of the densitometer, the outlet of the densitometer is connected to the inlet of the U-tube online viscosity detection unit, and the outlet of the U-tube online viscosity detection unit is connected to the outlet of the pipeline body.

[0021] By adopting the above technical solution, the device integrates the mud conveying component and the monitoring component sequentially on the same pipeline body along the mud flow direction. The stable conveying and pretreatment of mud are achieved through the synergistic action of the filter screen, electric diaphragm pump and pulse damper. Then, the three core indicators are synchronously, continuously and in-situ online detected by the pH detector, densitometer and U-tube viscosity online detection unit. This effectively avoids the problems of sampling lag, scattered operation and asynchronous data in traditional detection methods, and provides real-time and accurate data support for the dynamic control of mud performance in diaphragm wall construction.

[0022] Preferably, the U-shaped tube viscosity online detection unit includes: A first measuring tube and a second measuring tube are arranged in parallel, wherein the inlet of the first measuring tube is connected to the outlet of the densitometer, the outlet of the first measuring tube is connected to the inlet of the second measuring tube, and the outlet of the second measuring tube is connected to the outlet of the pipeline body. The first measuring tube is sequentially provided with a first differential pressure measuring component and a first tilt sensor, and the distance between the first differential pressure measuring component and the first tilt sensor is 20mm; The second measuring tube is provided with a second differential pressure measuring component and a second tilt sensor in sequence, and the distance between the second differential pressure measuring component and the second tilt sensor is 16mm.

[0023] By adopting the above technical solution, the U-tube viscosity online detection unit adopts a dual-tube series differential pressure measurement structure. By setting differential pressure measuring components with different spacings on the two measuring tubes and combining them with tilt sensors, it can collect differential pressure data in real time during the mud flow process and perform angle compensation, effectively eliminating the influence of pipeline installation tilt on measurement accuracy, and realizing online, continuous and high-precision detection of mud viscosity.

[0024] The fourth objective of this invention is to provide an electronic device that improves the timeliness, completeness, and accuracy of monitoring data, thereby meeting the precise grout control requirements under complex geological conditions of ultra-deep wall walls.

[0025] The fourth objective of this invention is achieved through the following technical solution: An electronic device includes a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and execute the online monitoring method for diaphragm wall construction mud as described above.

[0026] The fifth objective of this invention is to provide a computer-readable storage medium capable of storing corresponding programs, which facilitates the improvement of the timeliness, completeness, and accuracy of monitoring data to meet the precise grout control requirements under complex geological conditions of ultra-deep wall.

[0027] The fifth objective of this invention is achieved through the following technical solution: A computer-readable storage medium storing a computer program capable of being loaded by a processor and executing the online monitoring method for diaphragm wall construction mud as described above.

[0028] In summary, the present invention has at least one of the following beneficial technical effects: This invention achieves precise adaptation of mud performance control to geological conditions by dynamically matching the control threshold of the corresponding soil layer based on the excavation depth of the trenching machine. In addition, by combining the three core indicators of density, viscosity and pH, it effectively solves the problem of incomplete coverage of monitoring indicators in the existing technology, and provides reliable data support for the trenching quality of ultra-deep underground continuous walls under complex geological conditions. This invention employs a multi-level threshold grading and differentiated control strategy. Based on the qualified, critical, and deteriorated states of three indicators, it automatically matches three disposal methods: recycling, performance adjustment, or disposal. Combined with the deviation amount, it quantitatively controls the injection of new mud or regenerated mud, thereby realizing intelligent control of mud performance. This avoids the problems of over-supply or under-adjustment and improves the timeliness and accuracy of mud performance control. This invention integrates the mud conveying component and the monitoring component sequentially along the mud flow direction into the same pipeline body. With the coordinated operation of the filter screen, electric diaphragm pump, pulse damper, pH detector, densitometer, and U-tube viscosity online detection unit, it effectively avoids the problems of sampling lag, scattered operation, and asynchronous data in traditional detection methods. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the steps of an online monitoring method for slurry during the construction of a diaphragm wall, provided in Embodiment 1 of the present invention.

[0030] Figure 2 This is a structural block diagram of an online monitoring system for slurry during the construction of underground continuous walls, provided in Embodiment 2 of the present invention.

[0031] Figure 3 This is a schematic diagram of the structure of an online monitoring device for diaphragm wall construction mud provided in Embodiment 3 of the present invention.

[0032] Figure 4 This is a schematic diagram of the layout of an online monitoring device for slurry during the construction of a diaphragm wall, provided in Embodiment 3 of the present invention. Detailed Implementation

[0033] This invention provides an online monitoring method and system for slurry in diaphragm wall construction, addressing the problem that existing technologies cannot meet the timeliness and accuracy requirements for dynamic control of slurry performance in ultra-deep diaphragm wall construction. It improves the timeliness, completeness, and accuracy of monitoring data, thus adapting to the precise slurry control needs under complex geological conditions in ultra-deep diaphragm wall construction.

[0034] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0035] It should be noted that, in the embodiments of this invention, when the relevant object information and other related data are used in specific products or technologies, permission or consent from the object is required, and the collection, use, and processing of the relevant data must comply with the relevant laws, regulations, and standards of the relevant countries and regions. In other words, if the embodiments of this invention involve data related to an object, it must be obtained with the object's authorization and consent, the authorization and consent of relevant departments, and in accordance with the relevant laws, regulations, and standards of the country and region. If personal information is involved in the embodiments, the acquisition of all personal information requires the individual's consent; if sensitive information is involved, the separate consent of the information subject is required. The embodiments also need to be implemented with the object's authorization and consent.

[0036] It should be noted that the terms "first," "second," etc., used in this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this disclosure.

[0037] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article, unless otherwise specified, generally indicates that the preceding and following related objects have an "or" relationship. Example 1

[0038] Please see Figure 1 The present invention provides an online monitoring method for slurry during the construction of diaphragm walls, comprising: Step 101: Respond to the trenching machine's excavation command and determine the soil layer information corresponding to the excavation depth.

[0039] Preferably, step 101 includes the following sub-steps: S11. Parse the trenching machine's digging command to obtain the depth data field.

[0040] The trenching machine's digging command refers to the control signal issued by the trenching machine during the trenching operation, which contains information about the current digging depth.

[0041] The depth data field refers to the data segment in the digging command that carries the real-time depth value. It is in the form of a digital code and the unit is meters. It is used to identify the vertical position of the milling machine in the trench segment.

[0042] S12. Match the depth value in the depth data field with the preset geological stratification data to determine the soil layer information corresponding to the current excavation depth.

[0043] Pre-set geological stratification data refers to dividing the strata of the construction area into several layers according to depth range based on the engineering geological survey report. Each layer corresponds to a specific soil type (such as sandy silt, silty clay, silty sand, etc.) as the geological basis for adjusting mud performance.

[0044] Soil information refers to the types of strata and their physical and mechanical properties distributed at different depths in the construction area, including but not limited to soil type, depth range (elevation), density, moisture content, particle size distribution and other geological characteristic data.

[0045] In this embodiment of the invention, when the trenching machine starts excavation, it first responds to the excavation command, parses the command, extracts the depth data field carried therein, and matches the depth data field with the preset geological stratification data to accurately identify the soil layer information corresponding to the current excavation depth.

[0046] Step 102: Based on soil layer information, determine the control threshold at the corresponding elevation of the soil layer.

[0047] Elevation refers to the vertical depth calculated downwards from the ground reference point during the construction of diaphragm walls. The unit is meters, and it is used to identify the stratum location corresponding to the mud performance control threshold.

[0048] Control thresholds refer to the judgment limits set for the three core indicators of mud density, viscosity, and pH, which are used to classify real-time monitoring data into qualified, critical, or deteriorated states.

[0049] Understandably, different soil layers have different requirements for mud performance due to their different physical and mechanical properties. For example, sandy silt layers are prone to trench wall collapse, so higher density and viscosity thresholds need to be set to ensure wall protection. Silt clay layers, on the other hand, require special attention to pH thresholds to maintain mud stability and avoid adverse reactions with the soil layer. Therefore, based on the soil layer name and depth range in the soil layer information, the mud density, viscosity and pH control thresholds at the corresponding elevation of the soil layer are retrieved from the pre-built control threshold database.

[0050] It should be noted that the control threshold database contains control threshold parameters for mud density, viscosity, and pH corresponding to different soil types and depth ranges. The control threshold parameters are formed by combining indoor tests with geological data from ultra-deep underground continuous wall construction and construction specifications. This database supports setting differentiated threshold parameters for different soil types.

[0051] In this embodiment of the invention, based on soil layer information, control thresholds for mud density, viscosity, and pH at the soil layer elevation are determined from a pre-built control threshold database.

[0052] Step 103: During the trenching process, the density, viscosity, and pH values ​​of the circulating mud in the trench section are collected in real time.

[0053] A trench segment refers to a long, narrow, deep trench excavated in sections according to the design length using a trenching machine during the construction of a diaphragm wall. It is a temporary working space formed before the diaphragm wall is poured.

[0054] Circulating mud refers to the mud that flows continuously between the trench section and the mud pool through a mud circulation system during the construction of diaphragm walls, in order to maintain the stability of the trench walls and suspend sediment.

[0055] Understandably, during the entire trenching process, the online monitoring device integrated into the trenching mud pipeline continuously and in real time collects data on the circulating mud within the trench section. In other words, the mud flows into the monitoring device from the main body of the circulation pipeline, and then flows sequentially through the pH detector, density meter, and U-tube viscosity online detection unit, simultaneously acquiring the pH value, density value, and viscosity value of the mud.

[0056] It should be noted that density, viscosity, and pH values ​​are all collected at a preset sampling frequency, such as 5 seconds, to ensure that changes in mud properties during the trenching process are captured in a timely manner.

[0057] In this embodiment of the invention, during the trenching process, density, viscosity and acidity values ​​are collected by an acidity detector, a densitometer and a U-tube viscosity online detection unit.

[0058] Step 104: Compare the density value, viscosity value, and pH value with the control threshold respectively.

[0059] The control thresholds include density control threshold, viscosity control threshold, and pH control threshold. The density control threshold includes a first density threshold and a second density threshold. The viscosity control threshold includes a first viscosity threshold and a second viscosity threshold. The pH control threshold includes a first pH threshold, a second pH threshold, and a third pH threshold.

[0060] Preferably, step 104 may include the following sub-steps: S21. Compare the density values ​​with the first density threshold and the second density threshold respectively.

[0061] The first density threshold refers to the upper limit of the qualified state of mud density. When the density value is less than or equal to the threshold, it is judged to be qualified. Preferably, the first density threshold can be set to 1.15 g / cm³.

[0062] The second density threshold refers to the lower limit value for judging the deterioration state of mud density. When the density value is greater than or equal to this threshold, it is judged as deterioration. Preferably, the second density threshold can be set to 1.35 g / cm³.

[0063] S22. When the density value is less than or equal to the first density threshold, it is judged to be in a qualified state.

[0064] S23. When the density value is greater than the first density threshold and less than the second density threshold, it is determined to be a critical state.

[0065] S24. When the density value is greater than or equal to the second density threshold, it is determined to be in a deteriorated state.

[0066] S31. Compare the viscosity value with the first viscosity threshold and the second viscosity threshold respectively.

[0067] The first viscosity threshold refers to the upper limit of the qualified viscosity of the mud. When the viscosity value is less than or equal to the threshold, it is judged to be qualified. Preferably, the first viscosity threshold can be set to 25s (funnel viscosity).

[0068] The second viscosity threshold refers to the lower limit value for judging the deterioration state of the mud viscosity. When the viscosity value is greater than or equal to this threshold, it is judged as deterioration. It is used to define the situation where the mud viscosity is too high and cannot be recycled normally. Preferably, the second viscosity threshold can be set to 40s (funnel viscosity).

[0069] S32. When the viscosity value is less than or equal to the first viscosity threshold, it is judged to be in a qualified state.

[0070] S33. When the viscosity value is greater than the first viscosity threshold and less than the second viscosity threshold, it is determined to be a critical state.

[0071] S34. When the viscosity value is greater than or equal to the second viscosity threshold, it is determined to be in a deteriorated state.

[0072] S41. Compare the pH value with the first pH threshold, the second pH threshold, and the third pH threshold, respectively.

[0073] The first pH threshold refers to the deterioration judgment threshold value of mud pH that is too low (too acidic). If it is below this value, it is judged to be in a deteriorated state. Preferably, the first pH threshold can be set to 7.0.

[0074] The second pH threshold refers to the lower limit of the qualified pH state of the mud. It is usually set to a neutral to slightly alkaline range and is used to define the starting point of good pH performance of the mud. Preferably, the second pH threshold can be set to 8.0.

[0075] The third pH threshold refers to the upper limit of the qualified pH state of the mud, and it is also the threshold for judging the deterioration of excessive alkalinity. If it is higher than this value, it is judged as a deterioration state. It is used to define the situation where the performance of the mud is caused by excessive alkalinity. Preferably, the third pH threshold can be set to 11.0.

[0076] S42. When the pH value is greater than or equal to the second pH threshold and less than or equal to the third pH threshold, it is judged to be in a qualified state.

[0077] S43. When the pH value is greater than or equal to the first pH threshold and less than the second pH threshold, it is determined to be a critical state.

[0078] S44. When the pH value is less than the first pH threshold or greater than the third pH threshold, it is determined to be in a deteriorated state.

[0079] It should be noted that the above-mentioned preferred values ​​can be adjusted adaptively according to the geological conditions of different construction areas, the design depth of the diaphragm wall, and engineering practice experience.

[0080] In this embodiment of the invention, after real-time collection of density, viscosity, and pH values, each index is compared with its corresponding control threshold to determine the current performance state of the mud. Specifically: For the density value, it is compared with the first density threshold and the second density threshold: if the density value is less than or equal to the first density threshold, it indicates that the mud density is within the ideal range and can meet the requirements for wall protection and cuttings carrying, and is judged as qualified; if the density value is greater than the first density threshold but less than the second density threshold, it indicates that the mud density is slightly high, there is a trend of performance decline but it has not yet failed, and is judged as critical state; if the density value is greater than or equal to the second density threshold, it indicates that the mud density is seriously out of standard, which may lead to excessive mud cake, drill string obstruction or wall protection failure, and is judged as deteriorated state; For the viscosity value, compare it with the first viscosity threshold and the second viscosity threshold: If the viscosity value is less than or equal to the first viscosity threshold, it indicates that the mud has good fluidity and sufficient slag-carrying capacity, and it is judged to be in a qualified state; If the viscosity value is greater than the first viscosity threshold but less than the second viscosity threshold, it indicates that the mud viscosity has increased, which may affect the circulation efficiency, and it is judged to be in a critical state; If the viscosity value is greater than or equal to the second viscosity threshold, it indicates that the mud viscosity is too high, which is likely to cause difficulties in pumping, suspension failure or thickening of the slot wall attachment, and it is judged to be in a deteriorated state.

[0081] For the pH value, compare it with the first pH threshold, the second pH threshold and the third pH threshold. Among them, the second pH threshold and the third pH threshold form a qualified range: If the pH value is greater than or equal to the second pH threshold and less than or equal to the third pH threshold, it indicates that the mud is in a suitable acid-base environment, with stable wall protection performance and good compatibility with concrete, and it is judged to be in a qualified state; If the pH value is greater than or equal to the first pH threshold but less than the second pH threshold, it indicates that the mud is acidic, which may corrode the drill tool or affect the mud stability, and it is judged to be in a critical state; If the pH value is less than the first pH threshold or greater than the third pH threshold, it indicates that the mud is too acidic or too alkaline, which may cause the dispersion failure of clay particles or abnormal concrete setting, and it is judged to be in a deteriorated state.

[0082] Step 105, execute the corresponding hierarchical control strategy according to the comparison result, and jump to the step of continuously collecting the density value, viscosity value and pH value of the circulating mud in the slot during the downcutting process of the milling machine until all slot construction is completed.

[0083] Preferably, step 105 may include the following sub-steps: S51. When the determination results of the density value, viscosity value and pH value are all in the qualified state, execute the recycling strategy.

[0084] The recycling strategy refers to a control method in which when the three core indicators of the mud are all in the qualified state, the mud is made to enter the circulation system and continuously used by controlling the pipeline valves.

[0085] It can be understood that when the determination results of the three indicators are all in the qualified state, it indicates that the comprehensive performance of the current circulating mud is good and can meet the requirements of wall protection, slag-carrying and stability during the slot-forming process of the ultra-deep diaphragm wall. At this time, execute the recycling strategy, control the mud preparation execution device to open the circulating mud pipeline valve, and at the same time close the fresh mud pipeline valve and the deteriorated mud waste pipeline valve, so that the mud returns to the slot after sand removal and purification and is continuously recycled, realizing the maximum utilization of mud resources.

[0086] S52. When any one of the determination results of the density value, viscosity value or pH value is in the deteriorated state, execute the waste treatment strategy.

[0087] The waste disposal strategy refers to the control method that, when any core indicator of the mud reaches a deteriorated state, guides the deteriorated mud to the waste mud pond by controlling pipeline valves and sends it to the mud dewatering and drying equipment for centralized treatment.

[0088] Understandably, when any of the density, viscosity, or pH values ​​is determined to be in a deteriorated state, it indicates that a core indicator of the mud has seriously exceeded the control range. Continued use will lead to quality and safety accidents such as tank wall collapse, failure of sediment suspension, or decline in concrete setting quality. At this time, the waste disposal strategy should be implemented immediately. The mud mixing execution device should be controlled to close the valve of the circulating mud pipeline and open the valve of the waste mud pipeline to introduce the deteriorated mud into the waste mud pool. The mud should then be centrally treated through the mud dewatering and drying equipment to prevent the deteriorated mud from mixing into the circulation system and affecting the tank formation quality.

[0089] S53. When the determination results of density value, viscosity value or pH value are not in a deteriorated state, and at least one determination result is in a critical state, the performance adjustment strategy shall be executed.

[0090] Performance adjustment strategy refers to the control method that restores the critical index to the qualified range by quantitatively injecting fresh mud or regenerated mud to adjust the mud when any core index of the mud is in a critical state and the other indices have not reached a deteriorated state.

[0091] Specifically, the performance tuning strategy is as follows: The deviation is determined based on the difference between the density value, viscosity value, or pH value and the corresponding control threshold.

[0092] Deviation refers to the difference between the measured value of the critical state index and the corresponding control threshold. It is used to characterize the degree to which the mud performance deviates from the qualified range and is a quantitative basis for determining the amount of fresh mud to be injected.

[0093] The system generates instructions based on deviation to open the fresh mud pipeline and inject new or regenerated mud for blending and adjustment.

[0094] Fresh mud refers to mud that has been freshly prepared according to the construction mix ratio and whose various performance indicators are in a qualified state. It is used to replenish the circulating mud system and adjust the overall performance.

[0095] Regenerated mud refers to circulating mud that has been purified by desanding and its performance adjusted (by adding bentonite, soda ash, etc.) so that all its indicators have been restored to a qualified state and can be mixed with fresh mud for use.

[0096] Understandably, when any one of the density, viscosity, or pH values ​​is in a critical state, and the other two are not in a deteriorated state, it indicates that the overall performance of the mud is acceptable, but there are local deviations. If not intervened in time, it may deteriorate further. At this time, a performance adjustment strategy is implemented. First, the difference between the critical index value and the corresponding control threshold is calculated to determine the deviation. This deviation reflects the severity of the mud performance deviating from the qualified range. Then, according to the magnitude of the deviation, a corresponding control command is generated to control the mud mixing execution device to open the valve of the fresh mud pipeline and inject fresh mud or regenerated mud into the tank section for blending and adjustment, so that the mud performance indicators gradually return to the qualified range.

[0097] It should be noted that the greater the deviation, the more fresh mud should be injected to achieve precise adjustment and avoid over-supply or under-adjustment.

[0098] It is worth mentioning that after executing the corresponding graded control strategy based on the graded judgment results, the monitoring process does not terminate. Instead, it automatically jumps to the real-time acquisition step. That is, during the continuous excavation of the trenching machine, the density, viscosity, and pH values ​​of the circulating mud in the trench section are continuously collected in real time through the online monitoring device. The newly collected data is then sent back to the comparison and control process. This cycle continues until the trenching machine completes the trenching operation of all trench sections within the design depth range and the mud system stops running. Only then will the monitoring and control process end. Through this control mechanism, the stability of mud performance can be continuously guaranteed throughout the entire construction cycle of ultra-deep underground continuous wall, effectively responding to performance fluctuations caused by changes in geological conditions and construction disturbances, and providing a reliable guarantee for trenching quality and construction safety throughout the entire process.

[0099] In this embodiment of the invention, differentiated treatment methods are adopted according to the actual state of the mud performance, which not only ensures the recycling of qualified mud, but also realizes timely intervention in the critical state and decisive abandonment in the deteriorated state. This effectively supports the dynamic optimization of mud performance during the construction of ultra-deep underground continuous walls. Then, during the excavation of the trenching machine, the density value, viscosity value and pH value are continuously monitored and adjusted until the construction of all trench sections is completed. Example 2

[0100] Please see Figure 2 The present invention provides an online monitoring system for slurry during the construction of diaphragm walls, comprising: The information determination module 201 is used to respond to the trenching machine's excavation command and determine the soil layer information corresponding to the excavation depth.

[0101] The threshold determination module 202 is used to determine the control threshold at the corresponding elevation of the soil layer based on the soil layer information.

[0102] The data acquisition module 203 is used to collect the density, viscosity and pH values ​​of the circulating mud in the trench section in real time during the trenching process of the milling machine.

[0103] The data comparison module 204 is used to compare the density value, viscosity value and pH value with the control threshold respectively.

[0104] The strategy control module 205 is used to execute the corresponding graded control strategy based on the comparison results, and jump to the step of collecting the density, viscosity and pH values ​​of the circulating mud in the trench section in real time during the trench excavation process of the milling machine, until the construction of all trench sections is completed.

[0105] Since the above is a system corresponding to a method for online monitoring of slurry in diaphragm wall construction, and its implementation principle is the same as that of a method for online monitoring of slurry in diaphragm wall construction, for the sake of convenience and brevity, those skilled in the art can clearly understand that the specific working process of the system and modules described above can be referred to the corresponding process in the aforementioned method embodiments, and will not be repeated here. Example 3

[0106] Please see Figures 3 to 4 The present invention provides an online monitoring device for slurry during the construction of diaphragm walls, comprising: An online monitoring system for slurry during diaphragm wall construction, as shown in Example 2: The detection device includes a pipeline body, a mud conveying assembly, and a monitoring assembly. The mud conveying assembly and the monitoring assembly are installed on the pipeline body and are connected to each other. The mud conveying assembly includes a filter screen, an electric diaphragm pump, and a pulse damper. The filter screen is located at the inlet of the pipeline body, the outlet of the filter screen is connected to the inlet of the electric diaphragm pump, and the outlet of the electric diaphragm pump is connected to the inlet of the pulse damper. The monitoring components include a pH detector, a densitometer, and a U-tube online viscosity detection unit. The inlet of the pH detector is connected to the outlet of the pulse damper, the outlet of the pH detector is connected to the inlet of the densitometer, the outlet of the densitometer is connected to the inlet of the U-tube online viscosity detection unit, and the outlet of the U-tube online viscosity detection unit is connected to the outlet of the pipeline body.

[0107] Understandably, the online monitoring device for diaphragm wall construction mud includes a pipeline body, a mud conveying component, and a monitoring component. The pipeline body is equipped with the mud conveying component and the monitoring component, which are connected sequentially along the mud flow direction to form a through-type detection path. That is, the pipeline body is arranged horizontally, with an inlet at the left end and an outlet at the right end. The mud is input through the inlet, flows sequentially through the mud conveying component and the monitoring component, and is output from the outlet of the pipeline body to the return pipeline of the mud circulation system, thus returning to the mud circulation pool or directly flowing back into the trench section, realizing the recycling of mud and thereby achieving continuous online detection of mud in the flowing state.

[0108] Furthermore, the mud conveying assembly includes a filter screen, an electric diaphragm pump, and a pulse damper to drive the mud to flow stably within the pipeline and to pre-treat the mud to ensure the accuracy and stability of subsequent detection. Specifically, the filter screen is located at the inlet of the pipeline body to filter out large particulate impurities in the mud, preventing blockage or damage to subsequent detection equipment. The outlet of the filter screen is connected to the inlet of the electric diaphragm pump, which provides stable conveying power, drawing the mud from the pipeline inlet and pushing it to the downstream detection unit. The outlet of the electric diaphragm pump is connected to the inlet of the pulse damper, which eliminates pressure pulsations generated during the operation of the electric diaphragm pump, allowing the mud to enter the monitoring assembly at a stable flow rate, thereby avoiding the impact of flow rate fluctuations on detection accuracy.

[0109] It should be noted that the filter screen can be a pipeline filter, preferably a stainless steel Y-type filter or basket filter, and its filtration accuracy is selected according to the particle size distribution in the mud.

[0110] The electric diaphragm pump can be a pneumatic diaphragm pump or an electric diaphragm pump driven by a motor. It is preferred to use an electric diaphragm pump with variable frequency speed regulation function, whose flow rate can be adjusted according to the mud transportation needs to adapt to the changes in mud circulation volume at different construction stages.

[0111] The pulse damper can be a diaphragm-type pulse damper or an airbag-type pulse damper. It is preferred to use a diaphragm-type pulse damper that is directly connected to the outlet of the electric diaphragm pump. The working principle is to eliminate the pressure pulsation generated by the reciprocating motion of the electric diaphragm pump through the absorption and release of the internal elastic diaphragm or airbag, so that the mud flow velocity in the downstream pipeline tends to be stable, thereby avoiding the jump in detection data caused by flow velocity fluctuations and improving the accuracy and stability of data acquisition.

[0112] Furthermore, the monitoring components include a pH detector, a densitometer, and a U-tube online viscosity detection unit, used to sequentially perform online detection of the mud's pH, density, and viscosity. The inlet of the pH detector is connected to the outlet of the pulse damper for real-time detection of the mud's pH value; the outlet of the pH detector is connected to the inlet of the densitometer for real-time detection of the mud's density; the outlet of the densitometer is connected to the inlet of the U-tube online viscosity detection unit for real-time detection of the mud's viscosity; the outlet of the U-tube online viscosity detection unit is connected to the outlet of the pipeline body, and the mud after detection is returned to the mud circulation system through the pipeline outlet.

[0113] It should be noted that the pH detector can be an industrial online pH meter or a pH sensor using the ion-selective electrode method. It is preferable to use an online pH meter with automatic temperature compensation function. Its measuring electrode uses corrosion-resistant and pollution-resistant glass electrode or antimony electrode to adapt to the harsh working conditions of high solids content and high salinity in mud, and to ensure the long-term stability and accuracy of pH value detection.

[0114] The densitometer can be a tuning fork-type online relative densitometer, a differential pressure densitometer, or a radioactive densitometer. The preferred choice is a tuning fork-type online relative densitometer, which works by calculating the density of the mud in real time by changing the resonant frequency of the tuning fork in the mud. It has the advantages of fast response speed, high measurement accuracy, no radioactive pollution, and convenient installation and maintenance, and can meet the continuous detection needs under the state of mud flow.

[0115] In this embodiment of the invention, the slurry is input through the inlet at the left end of the pipeline body. First, it is filtered by a filter screen to remove large particulate impurities and prevent blockage of subsequent equipment. Then, an electric diaphragm pump provides stable delivery power to push the slurry to the pulse damper. The pulse damper eliminates the pressure pulsation generated during pumping, allowing the slurry to enter the monitoring component at a stable flow rate. The slurry flows sequentially through the pH detector, density meter, and U-tube viscosity online detection unit to complete real-time detection of pH value, density, and viscosity, respectively. After the detection is completed, the slurry returns to the return pipeline of the slurry circulation system through the outlet at the right end of the pipeline body, realizing continuous, in-situ, and synchronous online monitoring of the slurry in the flow state, providing real-time data support for the dynamic control of slurry performance.

[0116] Preferably, the U-tube online viscosity detection unit includes: A first measuring tube and a second measuring tube are arranged in parallel, wherein the inlet of the first measuring tube is connected to the outlet of the densitometer, the outlet of the first measuring tube is connected to the inlet of the second measuring tube, and the outlet of the second measuring tube is connected to the outlet of the pipeline body. The first measuring tube is sequentially equipped with a first differential pressure measuring component and a first tilt sensor, and the distance between the first differential pressure measuring component and the first tilt sensor is 20mm. The second measuring tube is equipped with a second differential pressure measuring component and a second tilt sensor, with a distance of 16 mm between the second differential pressure measuring component and the second tilt sensor.

[0117] It should be noted that the U-tube viscosity online detection unit adopts a dual-tube series differential pressure measurement structure. By measuring the pressure difference change generated when the mud flows in two pipes with different diameters or different measurement intervals, and combining the pipe tilt angle data collected by the tilt sensor, the central control unit calculates the real-time viscosity value of the mud.

[0118] The first measuring tube (A) and the second measuring tube (B) are set in parallel and have the same diameter. By setting pressure difference measuring components with different spacing and tilt sensors on the two measuring tubes, the viscosity measurement under different flow rate ranges can be complemented and verified, effectively improving the accuracy and range adaptability of viscosity detection.

[0119] It is worth mentioning that the first differential pressure measuring component and the second differential pressure measuring component can be differential pressure transmitters or differential pressure sensors. It is preferred to use high-precision capacitive differential pressure transmitters. Their range is selected according to the viscosity range of the mud, and is usually set to 0-10 kPa or 0-50 kPa. They are used to collect the pressure difference value generated when the mud flows through the measuring tube in real time.

[0120] The first and second tilt sensors can be MEMS (Micro-Electro-Mechanical Systems) tilt sensors or electrolyte-type tilt sensors. Preferably, a digital output dual-axis MEMS tilt sensor is used to measure the installation tilt angle of the measuring tube in real time, so as to compensate for the differential pressure data, eliminate measurement errors caused by on-site installation conditions, and ensure the accuracy and reliability of viscosity calculation results.

[0121] Preferably, the distance between the first differential pressure measuring component and the first tilt sensor is 20mm, and the distance between the second differential pressure measuring component and the second tilt sensor is 16mm. The above-mentioned distance parameters are optimized values ​​determined by theoretical calculation and experimental calibration based on the typical viscosity range (22s~40s) of the construction mud for ultra-deep underground continuous wall and the inner diameter of the pipeline. This distance can obtain the best differential pressure signal strength and signal-to-noise ratio, ensuring the sensitivity and stability of viscosity detection.

[0122] In this embodiment of the invention, the slurry, after being detected by a densitometer, enters the first measuring tube. As the slurry flows inside the tube, the first differential pressure measuring component collects the pressure difference between two measuring points on the first measuring tube. At the same time, the first tilt sensor detects the tilt angle of the measuring tube in real time and sends the differential pressure data and tilt angle data to the central control unit. The slurry then flows into the second measuring tube. The second differential pressure measuring component and the second tilt sensor collect the differential pressure and tilt angle data synchronously at a distance of 16 mm. Through the complementarity and verification of the two sets of data, the accuracy and range adaptability of viscosity detection are effectively improved. Finally, the slurry flows out of the outlet of the second measuring tube and returns to the outlet of the pipeline body.

[0123] It is worth mentioning that the online monitoring device also includes a central control unit, which is communicatively connected to the monitoring components. Understandably, the data collected by the monitoring components is transmitted to the central control unit via wired or wireless transmission. The central control unit is connected to the mud mixing execution device and is used to receive density, viscosity, and pH values ​​collected by the monitoring components. It compares and analyzes the real-time monitoring data with pre-stored control thresholds and generates corresponding control commands based on the comparison results, sending them to the mud mixing execution device.

[0124] The central control unit can be a programmable logic controller (PLC), an embedded industrial computer, or a distributed control system (DCS). An embedded industrial computer with data storage capabilities and a touchscreen human-machine interface is preferred. The central control unit pre-stores control thresholds for the construction mud used in ultra-deep underground continuous wall construction. These thresholds, including density, viscosity, and pH control thresholds, are pre-set based on construction specifications and indoor test results at different soil elevations, serving as the criteria for determining the mud's performance. The central control unit also features data recording and historical curve generation functions. It can display real-time monitoring data and trends for density, viscosity, and pH via a touchscreen, and supports data synchronization to remote computers or cloud servers via 5G networks for remote monitoring and data storage.

[0125] It should be noted that the mud blending execution device can be an execution unit composed of electric valves, variable frequency pumps, and pipeline switching mechanisms. It is used to respond to control commands sent by the central control unit to complete operations such as fresh mud replenishment, circulating mud flow, or inferior mud recycling. Specifically, the mud blending execution device includes a fresh mud replenishment valve installed on the fresh mud pipeline, a circulating mud valve installed on the circulating mud pipeline, and a waste mud discharge valve installed on the inferior mud pipeline. Each valve is preferably an electric ball valve or an electric butterfly valve, possessing characteristics of rapid response and reliable sealing. When the central control unit determines that the mud performance is qualified, it issues a command to open the circulating mud valve, allowing the mud to enter the circulating mud system for continuous use. When the mud performance is determined to be deteriorated, it issues a command to close the circulating mud valve and open the waste mud discharge valve, directing the deteriorated mud into the waste mud pool for centralized treatment. When the mud performance is determined to be at a critical state, it issues a command to open the fresh mud replenishment valve, injecting fresh mud or regenerated mud into the tank section for blending and adjustment to restore the mud performance to the qualified range.

[0126] It should be noted that the central control unit analyzes the data transmitted from the online viscosity detection unit of the U-tube, performs angle compensation to eliminate measurement errors caused by installation tilt, and then calculates the real-time viscosity value of the mud based on Poiseuille's law and the compensated pressure difference data. Specifically: The formula for calculating angle compensation is as follows:

[0127] In the formula, This is the pressure difference value after angle compensation. This is the original differential pressure value. The tilt angle is collected by the tilt sensor when the measuring tube is set horizontally. No compensation is required; when the measuring tube is tilted, the pressure difference data is corrected by a cosine function to eliminate the influence of gravity component on the pressure difference measurement.

[0128] Subsequently, based on Poiseuille's law, the real-time viscosity of the mud was calculated using the compensated pressure difference data. The calculation formula for Poiseuille's law is as follows:

[0129] In the formula, The value is the real-time viscosity, and r is the inner diameter of the measuring tube. The compensated differential pressure value is given by Q, where Q is the mud volume flow rate and L is the distance between the two measuring points of the differential pressure measuring component.

[0130] It should be noted that the mud volume flow rate can be obtained from the flow rate setpoint of the electric diaphragm pump, or it can be collected in real time by an additional flow meter.

[0131] Since the first and second measuring tubes use different measuring intervals (20mm and 16mm respectively), the central control unit calculates the first viscosity value based on the first compensation pressure difference value and the 20mm interval, and calculates the second viscosity value based on the second compensation pressure difference value and the 16mm interval. Then, the two are weighted averaged or verified and compared to obtain the final real-time viscosity value of the mud.

[0132] It is worth mentioning that when the deviation between the two sets of calculation results is small, the average value is taken as the output value; when the deviation is large, the central control unit determines that there may be abnormalities such as bubbles or blockages, and issues an alarm.

[0133] Furthermore, please participate Figure 4 , Figure 4 This is a schematic diagram illustrating the layout of an online monitoring device for slurry during diaphragm wall construction, provided in Embodiment 3 of the present invention. It can be understood that... Figure 3 The online monitoring device shown is integrated as a monitoring module and applied to... Figure 4 The overall mud circulation system shown is specifically set on the pipeline corresponding to the trenching mud to collect real-time data on three core indicators of the circulating mud in the trenching section: density, viscosity, and pH value.

[0134] Figure 4 The system shown takes the trenching area of ​​the diaphragm wall as the core working area and includes a fresh slurry supply module, a slurry circulation module, a monitoring module, a pipeline control module, and a slurry treatment module. It integrates slurry supply, circulation, monitoring, and control. The specific composition and connection relationship of each module are as follows: The fresh mud supply module includes fresh mud 1, fresh mud 2 and circulating mud 3, which are used to store fresh mud and reserve circulating mud. This module is connected to the mud circulation system through pipelines and replenishes the system with fresh mud under the control of the central control unit to adjust the performance parameters of the circulating mud.

[0135] The mud circulation module is distributed from top to bottom and from right to left along the attached diagram. It includes components such as a new mud pump, circulating mud pumps 4 to 12, a mud pump to be treated, and a waste mud pump, forming a mud circulation path covering the trenching area. Circulating mud 7 and 8 are connected to the trenching mud pipeline to realize the flow of mud between the circulation system and the construction area, ensuring the continuous circulation and stable performance of the wall protection mud.

[0136] The monitoring module is equipped with an online monitoring device 18 for mud density, viscosity, and pH value on the pipeline corresponding to the mud in the trench. Figure 3 The online monitoring device shown is used to collect data on three core indicators of the mud in the trench in real time. The monitoring device is connected to the central control unit to provide real-time and accurate data support for mud performance regulation decisions.

[0137] The pipeline control module is equipped with a pipeline opening and closing control switch 17 on each mud branch pipeline to control the on / off state of different mud branches. By switching the switch, different working modes such as fresh mud replenishment, circulating mud flow, and poor mud discharge can be realized to meet the diverse needs of mud performance regulation.

[0138] The mud treatment module includes a desanding mud treatment unit and a mud drying unit. The desanding mud treatment unit is used to remove sand and purify the circulating mud, and the desanded mud is returned to the circulation system. The mud drying unit is used to centrally dewater and dry inferior mud.

[0139] It is worth mentioning that the mud treatment module also includes auxiliary units such as a clear water tank and a bentonite stockpile, which provide necessary material support for mud performance adjustment. The inferior mud branch is connected to the mud drying unit and is used to introduce mud that is determined to be in a deteriorated state into the drying unit for environmentally friendly treatment, so as to avoid the deteriorated mud from affecting the quality of the trench. Example 4

[0140] An electronic device according to an embodiment of the present invention includes: a memory and a processor, wherein the memory stores a computer program; when the computer program is executed by the processor, the processor performs the online monitoring method for diaphragm wall construction mud as described in any of the above embodiments.

[0141] The memory can be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. The memory has storage space for program code used to perform any of the method steps described above. For example, the storage space for program code may include individual program codes for implementing the various steps in the methods described above. This program code can be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, compact discs (CDs), memory cards, or floppy disks. The program code may be compressed, for example, in a suitable form. When run by a computing processing device, this code causes the computing processing device to perform the various steps in the methods described above. Example 5

[0142] This invention provides a computer-readable storage medium storing a computer program thereon, which, when executed, implements the online monitoring method for diaphragm wall construction mud according to any of the above embodiments.

[0143] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0144] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0145] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0146] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0147] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0148] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for online monitoring of slurry during the construction of diaphragm walls, characterized in that, include: Responding to the trenching machine's excavation command, determine the soil layer information corresponding to the excavation depth; Based on the soil layer information, determine the control threshold at the corresponding elevation of the soil layer; During the trenching process, the density, viscosity, and pH values ​​of the circulating mud in the trench section are collected in real time. The density value, viscosity value, and pH value are compared with the control threshold, respectively. Based on the comparison results, the corresponding graded control strategy is executed, and the process jumps to the step of collecting the density, viscosity and pH values ​​of the circulating mud in the trench section in real time during the trenching process of the milling machine, until the construction of all trench sections is completed.

2. The method for online monitoring of construction mud in diaphragm wall construction according to claim 1, characterized in that, The process of responding to the trenching machine's excavation command and determining the soil layer information corresponding to the excavation depth includes: The trenching machine's digging command is parsed to obtain the depth data field; The depth value in the depth data field is matched with the preset geological stratification data to determine the soil layer information corresponding to the current excavation depth.

3. The method for online monitoring of construction mud in diaphragm wall construction according to claim 1, characterized in that, The control thresholds include a density control threshold, a viscosity control threshold, and a pH control threshold. The density control threshold includes a first density threshold and a second density threshold. The viscosity control threshold includes a first viscosity threshold and a second viscosity threshold. The pH control threshold includes a first pH threshold, a second pH threshold, and a third pH threshold. The step of comparing the density value, the viscosity value, and the pH value with the control thresholds includes: The density value is compared with the first density threshold and the second density threshold respectively; When the density value is less than or equal to the first density threshold, it is determined to be in a qualified state; When the density value is greater than the first density threshold and less than the second density threshold, it is determined to be a critical state; When the density value is greater than or equal to the second density threshold, it is determined to be in a deteriorated state; The viscosity value is compared with the first viscosity threshold and the second viscosity threshold, respectively; When the viscosity value is less than or equal to the first viscosity threshold, it is determined to be in a qualified state; When the viscosity value is greater than the first viscosity threshold and less than the second viscosity threshold, it is determined to be a critical state; When the viscosity value is greater than or equal to the second viscosity threshold, it is determined to be in a deteriorated state; The pH value is compared with the first pH threshold, the second pH threshold, and the third pH threshold, respectively. When the pH value is greater than or equal to the second pH threshold and less than or equal to the third pH threshold, it is determined to be in a qualified state; When the pH value is greater than or equal to the first pH threshold and less than the second pH threshold, it is determined to be a critical state. When the pH value is less than the first pH threshold or greater than the third pH threshold, it is determined to be in a deteriorated state.

4. The method for online monitoring of construction mud in diaphragm wall construction according to claim 1, characterized in that, The step of executing the corresponding graded control strategy based on the comparison result includes: When the density value, viscosity value, and pH value are all deemed acceptable, a recycling strategy is implemented. When any one of the density value, viscosity value, or pH value is determined to be in a deteriorated state, a waste disposal strategy is implemented. When the determination results of the density value, the viscosity value, and the pH value are all not in a deteriorated state, and at least one determination result is in a critical state, the performance adjustment strategy is executed.

5. The method for online monitoring of construction mud in diaphragm wall construction according to claim 4, characterized in that, The performance tuning strategy is as follows: The deviation is determined based on the difference between the density value, the viscosity value, or the pH value and the corresponding control threshold. Based on the aforementioned deviation, instructions are generated to open the fresh mud pipeline and inject new or regenerated mud for blending and adjustment.

6. An online monitoring system for slurry during the construction of diaphragm walls, characterized in that, include: The information determination module is used to respond to the trenching machine's excavation command and determine the soil layer information corresponding to the excavation depth; The threshold determination module is used to determine the control threshold at the corresponding elevation of the soil layer based on the soil layer information. The data acquisition module is used to collect the density, viscosity and pH values ​​of the circulating mud in the trench section in real time during the trenching process of the trenching machine. The data comparison module is used to compare the density value, the viscosity value, and the pH value with the control threshold, respectively. The strategy control module is used to execute the corresponding hierarchical control strategy according to the comparison results, and jump to the step of collecting the density, viscosity and pH values ​​of the circulating mud in the trench section in real time during the trenching process of the milling machine, until the construction of all trench sections is completed.

7. An online monitoring device for slurry during the construction of diaphragm walls, characterized in that, include: The online monitoring system for diaphragm wall construction mud as described in claim 6; The detection device includes a pipeline body, a mud conveying assembly, and a monitoring assembly. The mud conveying assembly and the monitoring assembly are mounted on the pipeline body and are connected to each other. The mud conveying assembly includes a filter screen, an electric diaphragm pump, and a pulse damper. The filter screen is located at the inlet of the pipeline body, the outlet of the filter screen is connected to the inlet of the electric diaphragm pump, and the outlet of the electric diaphragm pump is connected to the inlet of the pulse damper. The monitoring components include a pH detector, a densitometer, and a U-tube online viscosity detection unit. The inlet of the pH detector is connected to the outlet of the pulse damper, the outlet of the pH detector is connected to the inlet of the densitometer, the outlet of the densitometer is connected to the inlet of the U-tube online viscosity detection unit, and the outlet of the U-tube online viscosity detection unit is connected to the outlet of the pipeline body.

8. The online monitoring device for diaphragm wall construction mud according to claim 7, characterized in that, The U-shaped tube viscosity online detection unit includes: A first measuring tube and a second measuring tube are arranged in parallel, wherein the inlet of the first measuring tube is connected to the outlet of the densitometer, the outlet of the first measuring tube is connected to the inlet of the second measuring tube, and the outlet of the second measuring tube is connected to the outlet of the pipeline body. The first measuring tube is sequentially provided with a first differential pressure measuring component and a first tilt sensor, and the distance between the first differential pressure measuring component and the first tilt sensor is 20mm; The second measuring tube is provided with a second differential pressure measuring component and a second tilt sensor in sequence, and the distance between the second differential pressure measuring component and the second tilt sensor is 16mm.

9. An electronic device, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed as described in any one of claims 1 to 5 for online monitoring of slurry in diaphragm wall construction.

10. A computer-readable storage medium, characterized in that, The system contains a computer program that can be loaded by a processor and executed as described in any one of claims 1 to 5 for online monitoring of slurry during diaphragm wall construction.

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