Canyon deposit curtain grouting construction method and device capable of enhancing structural strength

Abstract

The present invention relates to the technical field of water conservancy project construction, and in particular to a canyon deposit curtain grouting construction method and apparatus capable of enhancing structural strength, which comprises: obtaining the rock and soil porosity, permeability, and temperature change rate of the canyon deposit area; constructing a deposit geological model based on the rock and soil porosity, permeability, and temperature change rate, and determining grouting parameters based on the deposit geological model; drilling grouting holes according to the grouting parameters, injecting a composite slurry into the grouting holes, monitoring and adjusting the grouting parameters in real time, and adjusting the slurry properties according to temperature changes. After the grouting is completed, the structural integrity and impermeability of the curtain body are tested and evaluated, and if they do not meet the requirements, supplementary grouting is performed. This solves the problems of uneven grouting structural strength in complex geological environments and the impact of temperature changes on slurry properties in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of water conservancy project construction, and in particular to a canyon accumulation body curtain grouting construction method and device capable of enhancing structural strength. Background Art

[0002] In the field of water conservancy and hydropower engineering construction, curtain grouting construction of canyon deposits can be regarded as the core link to ensure the safety, stability and efficient anti-seepage of the project. As the key line of defense against groundwater infiltration and maintaining the stability of the project structure, the quality of the curtain body is directly related to the long-term operation and safety of the entire water conservancy and hydropower project. However, the unique and complex geological conditions of the canyon deposits pose huge challenges to the construction of curtain grouting. The porosity and permeability of the rock and soil in this area are extremely unevenly distributed, and the geological characteristics of different parts vary significantly. At the same time, external environmental factors, especially temperature changes, constantly interfere with the grouting process. This complex geological and environmental coupling makes it difficult for traditional curtain grouting construction methods to accurately control grouting parameters and meet actual construction needs.

[0003] Traditional curtain grouting construction methods have exposed many drawbacks when dealing with the complex working conditions of canyon deposits. Due to the lack of effective response strategies for complex geological conditions, uneven slurry diffusion is very likely to occur during the grouting process, with excessive slurry concentration in some areas and insufficient grouting in other areas, resulting in defects in the internal structure of the curtain body. This uneven grouting effect seriously affects the structural integrity and impermeability of the curtain body, making it unable to fully play its due anti-seepage and support functions. More importantly, the existing construction method lacks an effective adaptive adjustment mechanism when facing different geotechnical characteristics and rapidly changing environmental factors, and is unable to optimize the grouting process in a timely and accurate manner according to actual conditions. This directly leads to the difficulty in reliably guaranteeing construction quality. A large amount of tedious and costly repair work is often required in the later stages of the project, which not only increases construction costs but also significantly extends the construction period, bringing many adverse effects to the construction of water conservancy and hydropower projects. Summary of the Invention

[0004] The present invention provides a canyon deposit curtain grouting construction method and device that can enhance the structural strength, so as to solve the problems in the prior art such as uneven grouting structure strength under complex geological environments and temperature change conditions affecting slurry performance.

[0005] A first aspect of the present invention provides a canyon deposit curtain grouting construction method that can enhance structural strength, including the following steps: obtaining the rock and soil porosity, permeability and temperature change rate of the canyon deposit area; constructing a deposit geological model based on the rock and soil porosity, permeability and temperature change rate, and determining grouting parameters based on the deposit geological model, wherein the grouting parameters include but are not limited to grouting pressure, slurry flow rate and slurry ratio; drilling grouting holes according to the grouting parameters, injecting composite slurry into the grouting holes, monitoring and adjusting the grouting parameters in real time, and adjusting the slurry properties according to temperature changes. After the grouting is completed, the structural integrity and impermeability of the curtain body are tested and evaluated, and if they do not meet the requirements, supplementary grouting is performed.

[0006] Optionally, the composite slurry is injected into the grouting hole, including: monitoring the porosity, permeability and temperature change rate of the rock and soil, and automatically adjusting the nozzle diameter and the slurry flow rate; wherein, if the rock and soil porosity is greater than a first preset porosity, the nozzle diameter is increased and the slurry flow rate is appropriately increased; if the rock and soil porosity is less than a second preset porosity, the nozzle diameter is reduced and the slurry flow rate is reduced; if the permeability is greater than the first preset permeability, the nozzle diameter is increased, the injection amount of the slurry is increased, and the viscosity of the slurry is increased at the same time; if the permeability is less than the second preset permeability, the nozzle diameter is reduced and the injection pressure of the slurry is increased.

[0007] Optionally, the composite slurry consists of sodium silicate-cement-based double liquid slurry and a temperature-sensitive admixture.

[0008] Optionally, the sodium silicate-cement-based two-liquid slurry is a mixture of sodium silicate solution and cement slurry in a volume ratio of 1:(1-2), with a water-cement ratio of 0.5-0.8, and the amount of the temperature-sensitive admixture added is 0.5%-2% of the total mass of the sodium silicate-cement-based two-liquid slurry.

[0009] Optionally, the slurry performance is adjusted according to temperature changes, including: when it is detected that the temperature change rate exceeds a preset threshold, triggering a graded compensation mechanism, wherein the graded compensation mechanism includes: when a rapid temperature drop is detected, starting the heating wire arranged on the grouting pipeline, quickly preheating the grouting pipeline and the internal slurry, and increasing the release amount of the accelerating coagulant component in the temperature-sensitive admixture to 1%-1.5% of the total mass of the sodium silicate-cement-based two-liquid slurry; when a rapid temperature rise is detected, cooling the slurry, and reducing the release amount of the accelerating coagulant component in the temperature-sensitive admixture to 0.3%-0.5% of the total mass of the sodium silicate-cement-based two-liquid slurry.

[0010] Optionally, the structural integrity and impermeability of the curtain body are inspected and evaluated, and if they do not meet the requirements, re-grouting is carried out, including: based on the fusion technology of three-dimensional laser scanning and ultrasonic tomography, three-dimensional detection of the surface and internal structure of the curtain body is carried out, and a three-dimensional visualization model of the curtain body is generated; combined with the drilling water pressure test data, the anti-permeability performance of the curtain body is numerically simulated to determine whether it meets the design requirements; wherein, if it is assessed that the curtain body has loose structural areas or the permeability coefficient exceeds the standard, the cause of the defect is analyzed through the digital twin model, and a targeted re-grouting plan is formulated; during re-grouting, the proportion and grouting pressure of the re-grouting grouting liquid are automatically adjusted according to the porosity and permeability data of the defective area, and nano-scale expansive filling materials are added to the re-grouting grouting liquid to enhance the density of the curtain body; after the re-grouting is completed, a re-inspection is carried out until the structural integrity and impermeability of the curtain body meet the standards.

[0011] Optionally, a geological model of the accumulation body is constructed based on the porosity, permeability and temperature change rate of the rock and soil, including: based on the Kriging interpolation method, spatial interpolation processing is performed on the porosity and permeability of the rock and soil to generate a porosity distribution field and a permeability distribution field; based on a geographic information system platform, in combination with topographic and geomorphological data, a three-dimensional geological structure model of the canyon accumulation body is constructed; through indoor temperature control experiments, the porosity and permeability change patterns of the rock and soil under different temperature conditions are obtained, and a quantitative relationship model between temperature changes and the porosity and permeability of the rock and soil is established; the quantitative relationship model is embedded in the three-dimensional geological structure model to construct a temperature-rock and soil characteristic coupled accumulation body geological model; the accumulation body geological model is verified based on field monitoring data, and the differences between the rock and soil porosity, permeability and temperature distribution predicted by the model are compared with the actual monitoring values ​​to determine and optimize the model parameters.

[0012] The second aspect of the present invention provides a canyon deposit curtain grouting construction device that can enhance structural strength, including: an acquisition module for acquiring the rock and soil porosity, permeability and temperature change rate of the canyon deposit area; a construction module for constructing a deposit geological model based on the rock and soil porosity, permeability and temperature change rate, and determining grouting parameters based on the deposit geological model, wherein the grouting parameters include but are not limited to grouting pressure, slurry flow rate and slurry ratio; a processing module for drilling grouting holes according to the grouting parameters, injecting composite slurry into the grouting holes, monitoring and adjusting the grouting parameters in real time, and adjusting the slurry properties according to temperature changes. After the grouting is completed, the structural integrity and impermeability of the curtain body are tested and evaluated, and if they do not meet the requirements, supplementary grouting is performed.

[0013] Therefore, the present invention has at least the following beneficial effects:

[0014] The embodiment of the present invention obtains core parameters such as the porosity, permeability, and temperature change rate of the deposited rock and soil to construct a realistic geological model, providing a reliable basis for scientifically determining parameters such as grouting pressure, slurry flow rate, and ratio, and ensuring that the grouting scheme is adaptable to complex geological conditions from the source. During grouting construction, the grouting parameters are dynamically adjusted by real-time monitoring, and the slurry properties are flexibly adapted according to temperature changes, forming an adaptive adjustment mechanism for the grouting process, effectively responding to variable interference during construction and ensuring stable and efficient grouting operations. After grouting is completed, the integrity and impermeability of the curtain body structure are comprehensively tested and evaluated. If it does not meet the requirements, it is immediately re-filled, forming a closed-loop control of grouting quality. With precise geological modeling, dynamic parameter regulation, and closed-loop quality control, the curtain body structural integrity, impermeability, and adaptability of grouting construction to complex working conditions are significantly improved, the subsequent repair costs and construction period are greatly reduced, and the safe, economical, and efficient construction of water conservancy and hydropower projects are effectively guaranteed. Thus, the existing technology solves the problems of uneven grouting structure strength in complex geological environments and the influence of temperature change conditions on slurry properties.

[0015] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0017] Figure 1 A flowchart of a curtain grouting construction method for a canyon deposit capable of enhancing structural strength according to an embodiment of the present invention;

[0018] Figure 2 A flowchart of pre-construction preparation according to one embodiment of the present invention;

[0019] Figure 3 A schematic diagram of porosity distribution in a canyon deposit provided according to one embodiment of the present invention;

[0020] Figure 4 A flowchart of a grouting construction process according to one embodiment of the present invention;

[0021] Figure 5 A flowchart of post-construction inspection and refilling according to one embodiment of the present invention;

[0022] Figure 6 This is a block diagram of an exemplary device for curtain grouting a canyon deposit that can enhance structural strength according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0024] The following describes a canyon deposit curtain grouting construction method and apparatus that can enhance structural strength according to an embodiment of the present invention with reference to the accompanying drawings. To address the problem of the lack of an adaptive adjustment mechanism mentioned in the above-mentioned background technology, the present invention provides a canyon deposit curtain grouting construction method that can enhance structural strength. In this method, by obtaining core parameters such as the porosity, permeability, and temperature change rate of the deposit rock and soil, a realistic geological model is constructed, providing a reliable basis for scientifically determining parameters such as grouting pressure, slurry flow rate, and ratio, thereby ensuring that the grouting scheme is adaptable to complex geological conditions from the source. During grouting construction, the grouting parameters are dynamically adjusted through real-time monitoring, and the slurry properties are flexibly adapted according to temperature changes, forming an adaptive adjustment mechanism for the grouting process, effectively addressing variable interference during construction and ensuring stable and efficient grouting operations. After grouting is completed, the integrity and impermeability of the curtain structure are comprehensively tested and evaluated. If it does not meet the requirements, additional grouting is immediately carried out, forming a closed-loop control of grouting quality. With precise geological modeling, dynamic parameter regulation, and closed-loop quality control, the structural integrity and impermeability of the curtain body and the adaptability of grouting construction to complex working conditions are significantly improved, the subsequent repair costs and construction period are greatly reduced, and the safe, economical, and efficient construction of water conservancy and hydropower projects are effectively guaranteed. This solves the problems in the prior art such as uneven strength of grouting structures in complex geological environments and the influence of temperature changes on slurry performance.

[0025] The following describes a canyon deposit curtain grouting construction method and apparatus that can enhance structural strength according to an embodiment of the present invention with reference to the accompanying drawings.

[0026] Specifically, Figure 1 A schematic flow chart of a canyon deposit curtain grouting construction method for enhancing structural strength provided by an embodiment of the present invention.

[0027] like Figure 1 As shown, the canyon deposit curtain grouting construction method for enhancing structural strength includes the following steps:

[0028] In step S101, the porosity, permeability and temperature change rate of the rock and soil in the canyon deposit area are obtained.

[0029] Among them, the porosity of rock and soil refers to the ratio of the pore volume in the rock and soil to the total volume of the rock and soil, the permeability refers to the ability of the rock and soil to allow fluid to pass through, and the temperature change rate refers to the change in temperature per unit time.

[0030] It can be understood that the embodiments of the present invention obtain the porosity, permeability and temperature change rate of the rock and soil in the canyon accumulation area, accurately grasp the geological characteristics and environmental dynamic information of the accumulation body, and facilitate the subsequent grouting construction to accurately adapt to complex geological conditions.

[0031] In step S102, a geological model of the accumulation body is constructed according to the porosity, permeability and temperature change rate of the rock and soil, and grouting parameters are determined based on the geological model of the accumulation body.

[0032] The grouting parameters include but are not limited to grouting pressure, slurry flow rate and slurry ratio.

[0033] It is understandable that the embodiments of the present invention construct a geological model of the accumulation body using rock and soil porosity, permeability, and temperature change rate as core data, and determine grouting parameters accordingly. The geological model accurately reproduces the complex geological characteristics of the accumulation body coupled with the dynamic environment, breaking the ambiguity of traditional exploration; the grouting parameters are scientifically deduced based on the model, accurately adapting to different geological zones, avoiding the blindness of empirical decision-making, and ensuring grouting quality from the source. Through precise hole location planning, slurry volume estimation, and resource coordination, construction costs and cycles are significantly reduced, and resource utilization is greatly improved.

[0034] In an embodiment of the present invention, a geological model of an accumulation body is constructed based on the porosity, permeability and temperature change rate of rock and soil, including: spatially interpolating the porosity and permeability of the rock and soil based on the Kriging interpolation method to generate a porosity distribution field and a permeability distribution field; constructing a three-dimensional geological structure model of the canyon accumulation body based on a geographic information system platform and combining topographic and geomorphological data; obtaining the porosity and permeability change patterns of the rock and soil under different temperature conditions through indoor temperature control experiments, and establishing a quantitative relationship model between temperature change and the porosity and permeability of the rock and soil; embedding the quantitative relationship model into the three-dimensional geological structure model to construct a temperature-rock and soil characteristic coupled accumulation body geological model; verifying the accumulation body geological model based on field monitoring data, comparing the differences between the rock and soil porosity, permeability and temperature distribution predicted by the model and the actual monitored values, and determining and optimizing the model parameters.

[0035] It is understood that the embodiments of the present invention use Kriging interpolation to convert discrete sampling data of rock and soil porosity and permeability into a continuous spatial distribution field. This method, combined with geographic information systems and topographic data, constructs a three-dimensional geological structure model, forming a three-dimensional digital portrait that restores the geological structure and rock and soil properties of the accumulation body. A quantitative relationship model between temperature and rock and soil parameters is established through indoor temperature control experiments. This model is embedded in the three-dimensional model to construct a coupled geological model of temperature and rock and soil properties, achieving a deep integration of environmental geological factors. Predictions based on this coupled model, optimized through on-site monitoring, significantly improve geological cognition accuracy and accurately depict geological dynamic characteristics. Based on this, grouting parameters and processes are optimized to improve grouting uniformity and curtain body quality, reducing construction costs.

[0036] Specifically, the process of constructing a geological model based on the Kriging interpolation method is demonstrated, using a 500-meter-long and 300-meter-wide canyon accumulation area as an example. First, 15 sampling points were set up at 100-meter-by-100-meter intervals to collect geotechnical porosity, permeability, and temperature data. Next, the data was processed using the Kriging interpolation algorithm in GIS software to generate porosity and permeability distribution fields. A three-dimensional geological structure model was constructed on the GIS platform, combining topographic and geomorphological data. A quantitative relationship model between temperature and geotechnical properties was established through indoor temperature-controlled experiments. This quantitative relationship model was then embedded into the three-dimensional geological structure model to form a coupled model. Finally, five new monitoring points were selected to compare measured and predicted data, optimizing model parameters to ensure model accuracy and reliability, providing support for curtain grouting construction.

[0037] In step S103, grouting holes are drilled according to the grouting parameters, and the composite slurry is injected into the grouting holes. The grouting parameters are monitored and adjusted in real time, and the slurry properties are adjusted according to temperature changes. After the grouting is completed, the structural integrity and impermeability of the curtain body are tested and evaluated. If they do not meet the requirements, supplementary grouting is performed.

[0038] The composite slurry is composed of sodium silicate-cement-based double liquid slurry and temperature-sensitive admixture.

[0039] It can be understood that the embodiment of the present invention relies on the early coupled geological model to accurately determine the grouting parameters, and accordingly drills grouting holes and injects a composite slurry composed of sodium silicate-cement-based dual-liquid slurry and temperature-sensitive admixtures. The performance of the composite slurry can be dynamically adapted to different geological conditions to achieve precise matching with rock and soil properties; a dynamic feedback adjustment mechanism is constructed during the grouting process to monitor and adjust the grouting parameters in real time to cope with pressure fluctuations, uneven diffusion and other conditions, and at the same time, with the help of temperature-sensitive admixtures, the slurry performance is flexibly adjusted according to temperature changes to ensure grouting stability and continuity; after the grouting is completed, the curtain body is subjected to structural integrity and impermeability testing and evaluation, and defects are promptly repaired and treated to form a complete quality control system.

[0040] It should be noted that the sodium silicate-cement-based two-liquid slurry is a mixture of sodium silicate solution and cement slurry in a volume ratio of 1:(1~2), the water-cement ratio is 0.5-0.8, and the amount of temperature-sensitive admixture added is 0.5%-2% of the total mass of the sodium silicate-cement-based two-liquid slurry.

[0041] Specifically, in most conventional areas of the accumulation, due to the relatively uniform geotechnical characteristics, a sodium silicate solution was mixed with cement slurry at a volume ratio of 1:1.5, with a water-cement ratio of 0.7, to ensure a balance between slurry fluidity and setting strength. Furthermore, given the relatively stable construction ambient temperature (average temperature around 20°C), the addition of a temperature-sensitive admixture was set at 1% of the total mass of the sodium silicate-cement-based two-liquid slurry. This ensured the slurry would set stably at normal construction speeds, meeting the grouting requirements of conventional areas.

[0042] When encountering high-porosity, high-permeability areas with a porosity of 35% and a permeability of 0.15 cm / s, the volume ratio of sodium silicate solution to cement slurry was adjusted to 1:1.2 to enhance the slurry's filling and loss resistance. The lower sodium silicate ratio allows the cement slurry to exert a stronger bonding effect when filling the pores, while simultaneously reducing the water-cement ratio to 0.6 and increasing the slurry concentration. The addition of a temperature-sensitive admixture was increased to 1.5%, ensuring slurry fluidity while accelerating setting and preventing excessive slurry loss in high-permeability areas, ensuring effective grouting in these areas.

[0043] On the afternoon of the second day of construction, the ambient temperature rose rapidly from 20°C to 32°C within two hours. To prevent the slurry from setting too quickly due to the high temperature, in addition to cooling the slurry, the sodium silicate-cement-based two-liquid slurry ratio was adjusted. The volume ratio of sodium silicate solution to cement slurry was maintained at 1:1.5, but the water-cement ratio was slightly increased to 0.75 to increase the moisture content in the slurry and delay setting. The temperature-sensitive admixture release system reduced the release of the accelerating component from 1.2% to 0.4%, reducing the accelerating effect and further delaying the slurry setting time, ensuring smooth grouting operations in the high-temperature environment.

[0044] When refilling areas with loose structures and excessive permeability, the volume ratio of sodium silicate solution to cement slurry was adjusted to 1:1.8 to enhance the density of the curtain. Increasing the sodium silicate content facilitates better penetration and diffusion of the slurry. The water-cement ratio was set at 0.65 to ensure the slurry had an appropriate consistency. Furthermore, a nano-scale expansive filler material was added, accounting for 1.5% of the total weight of the dual-liquid slurry, and the temperature-sensitive admixture was maintained at 1.2%. This ensured that the refill grout fully filled the defective areas, improving the structural integrity and impermeability of the curtain.

[0045] In an embodiment of the present invention, the composite slurry is injected into the grouting hole, including: monitoring the porosity, permeability and temperature change rate of the rock and soil, and automatically adjusting the nozzle diameter and the slurry flow rate; wherein, if the rock and soil porosity is greater than a first preset porosity, the nozzle diameter is increased and the slurry flow rate is appropriately increased; if the rock and soil porosity is less than a second preset porosity, the nozzle diameter is reduced and the slurry flow rate is reduced; if the permeability is greater than the first preset permeability, the nozzle diameter is increased, the injection amount of the slurry is increased, and the viscosity of the slurry is increased at the same time; if the permeability is less than the second preset permeability, the nozzle diameter is reduced and the injection pressure of the slurry is increased.

[0046] It can be understood that the embodiments of the present invention construct an intelligent adjustment system based on dynamic feedback of geological parameters by real-time monitoring of rock and soil porosity, permeability and temperature change rate, and automatically adjust the nozzle diameter and slurry flow rate (and viscosity, injection pressure) according to the porosity and permeability thresholds, accurately adapting to complex geological characteristics. It can flexibly expand the nozzle, accelerate slurry diffusion and optimize the slurry state to quickly fill the rock and soil pores according to the high porosity / high permeability characteristics, and can also reduce the nozzle and pressurize grouting to ensure effective penetration in low porosity / low permeability areas, thereby achieving dynamic matching of grouting parameters and geological conditions.

[0047] Specifically, in a curtain grouting project in a canyon deposit in southwest China, the construction team utilized a real-time monitoring system to obtain geotechnical porosity and permeability data. When the porosity exceeded 30%, the nozzle diameter was increased, increasing the slurry flow rate; when it was less than 20%, the nozzle diameter was reduced, reducing the flow rate. Regarding permeability, when it exceeded 0.10 cm / s, the nozzle was enlarged, increasing the injection volume and viscosity; when it was less than 0.06 cm / s, the nozzle was reduced, increasing the injection pressure. By dynamically adjusting parameters through an intelligent control system, construction efficiency increased by 20%, material waste was reduced by 15%, and the curtain's impermeability performance was improved by 30%.

[0048] In an embodiment of the present invention, the slurry performance is adjusted according to temperature changes, including: when it is detected that the temperature change rate exceeds a preset threshold, a graded compensation mechanism is triggered, wherein the graded compensation mechanism includes: when it is detected that the temperature drops rapidly, a heating wire arranged on the grouting pipeline is started to quickly preheat the grouting pipeline and the internal slurry, and the release amount of the accelerating coagulant component in the temperature-sensitive admixture is increased to 1%-1.5% of the total mass of the sodium silicate-cement-based two-liquid slurry; when it is detected that the temperature rises rapidly, the slurry is cooled to reduce the release amount of the accelerating coagulant component in the temperature-sensitive admixture to 0.3%-0.5% of the total mass of the sodium silicate-cement-based two-liquid slurry.

[0049] Among them, the preset threshold value can be specifically calibrated according to actual conditions, such as 2°C / h and the temperature is lower than 5°C.

[0050] As can be understood, the embodiments of the present invention construct a closed-loop system for dynamic temperature compensation, triggering a graded response mechanism by real-time monitoring of the temperature change rate. When the temperature drops rapidly, the grouting pipeline heating wire is automatically activated to preheat the slurry and increase the coagulant content of the temperature-sensitive admixture to 1%-1.5% of the total mass of the sodium silicate-cement-based dual-liquid slurry, accelerating the slurry's coagulation to adapt to low-temperature environments. When the temperature rises rapidly, the slurry is simultaneously cooled and the coagulant content is reduced to 0.3%-0.5%, slowing the curing process. This system achieves dynamic adaptation of the slurry's coagulant properties to the construction temperature through dual control pathways. It not only ensures the fluidity and stability of the slurry under extreme temperature differences through pipeline temperature control, but also precisely controls the coagulant time through admixture regulation, effectively avoiding grouting defects caused by sudden temperature changes, significantly improving the curtain body's density and anti-seepage performance, while reducing rework costs and resource waste. This provides an intelligent and precise technical solution for grouting construction in complex geological environments.

[0051] Specifically, during curtain grouting construction at a canyon water conservancy project, a preset threshold for the temperature change rate was set at 5°C per hour. When the temperature dropped from 15°C to 8°C (a rate of change of 7°C / hour) within one hour, a mechanism was triggered. The heating wire preheated the grout and increased the release of the temperature-sensitive admixture's accelerating component from 1% to 1.3%, shortening the initial setting time. When the temperature rose from 28°C to 35°C (a rate of change of 7°C / hour) within one hour, the cooling device cooled the grout, reducing the release of the accelerating component from 1.2% to 0.4%, extending the initial setting time. Ultimately, after the compensation, the curtain structure's integrity and impermeability met standards in the grouting area, ensuring construction quality.

[0052] In an embodiment of the present invention, the structural integrity and impermeability of the curtain body are inspected and evaluated, and if they do not meet the requirements, re-grouting is carried out, including: based on the fusion technology of three-dimensional laser scanning and ultrasonic tomography, the surface and internal structure of the curtain body are stereoscopically inspected, and a three-dimensional visualization model of the curtain body is generated. In combination with the drilling water pressure test data, the anti-permeability performance of the curtain body is numerically simulated to determine whether it meets the design requirements; wherein, if it is assessed that the curtain body has loose structural areas or the permeability coefficient exceeds the standard, the cause of the defect is analyzed through the digital twin model, and a targeted re-grouting plan is formulated; during re-grouting, the ratio and grouting pressure of the re-grouting grouting liquid are automatically adjusted according to the porosity and permeability data of the defective area, and nano-scale expansive filling materials are added to the re-grouting grouting liquid to enhance the density of the curtain body; after the re-grouting is completed, a re-inspection is carried out until the structural integrity and impermeability of the curtain body meet the standards.

[0053] It can be understood that the embodiment of the present invention integrates three-dimensional laser scanning and ultrasonic tomography technology to construct a three-dimensional detection network of the curtain body surface and interior, generate a high-precision three-dimensional visualization model, and carry out numerical simulation of anti-seepage performance in combination with drilling water pressure test data to achieve accurate quantitative evaluation of defect location, scale and cause; relying on the digital twin model to trace the defect formation mechanism, dynamically formulate grouting plans, and automatically adjust the slurry ratio and grouting pressure based on the porosity and permeability parameters of the defect area, introduce nano-scale expansive filling materials to improve the dense filling efficiency of the grouting grouting, form an integrated intelligent management and control system, effectively improve the defect detection rate to millimeter-level accuracy, reduce the loss of grouting materials by more than 30%, and optimize the curtain body permeability coefficient by more than 20% compared with the design standard, significantly enhancing the durability of the anti-seepage barrier.

[0054] The canyon deposit curtain grouting construction method, which can enhance structural strength, proposed in an embodiment of the present invention, obtains core parameters such as the porosity, permeability, and temperature change rate of the deposit rock and soil to construct a realistic geological model. This provides a reliable basis for scientifically determining parameters such as grouting pressure, slurry flow rate, and ratio, ensuring that the grouting scheme is adaptable to complex geological conditions from the source. During grouting construction, the grouting parameters are dynamically adjusted through real-time monitoring, and the slurry properties are flexibly adapted according to temperature changes, forming an adaptive adjustment mechanism for the grouting process. This effectively addresses variable interference during construction and ensures stable and efficient grouting operations. After grouting is completed, the curtain structure integrity and impermeability are comprehensively tested and evaluated. If it does not meet the requirements, additional grouting is immediately carried out, forming a closed-loop control of grouting quality. Through precise geological modeling, dynamic parameter regulation, and closed-loop quality control, the curtain structure integrity and impermeability are significantly improved, and the adaptability of grouting construction to complex working conditions is significantly improved, significantly reducing the cost and construction period of subsequent repairs, and effectively ensuring the safe, economical, and efficient construction of water conservancy and hydropower projects. This solves the problems in the prior art such as uneven strength of grouting structures in complex geological environments and the influence of temperature changes on slurry performance.

[0055] The following will describe a specific embodiment of a canyon deposit curtain grouting construction method that can enhance structural strength. In a large-scale water conservancy project in the southwest region, curtain grouting construction is required in a canyon deposit area that is 800 meters long and 400 meters wide. The curtain grouting construction method for canyon deposit curtain grouting that can enhance structural strength proposed by the present invention is used to carry out the work:

[0056] like Figure 2 As shown, preparation before construction

[0057] Data collection: Figure 3As shown, the construction team arranged 50 sampling points within the canyon deposits, using an 80-by-80-meter grid. Using specialized drilling equipment and sensors, they collected data on soil porosity (ranging from 18% to 38%), permeability (0.03-0.18 cm / s), and temperature variation (5-35°C) at each sampling point.

[0058] Constructing a geological model: Based on the Kriging interpolation method, the collected porosity and permeability data were spatially interpolated to generate detailed porosity and permeability distribution fields. Using a geographic information system platform, combined with high-precision topographic and geomorphological data for the region, a three-dimensional geological structure model was constructed. Subsequently, a temperature control test was conducted on representative rock and soil samples from the region in a laboratory simulating a temperature environment of 5-35°C. A quantitative relationship model between temperature changes and rock and soil porosity and permeability was established and embedded into the three-dimensional geological structure model to obtain a geological model of the accumulation body that couples temperature and rock and soil properties. Finally, the model was verified and optimized using field data from 10 additional monitoring points to ensure model prediction accuracy.

[0059] Determine grouting parameters: Based on the constructed geological model, the grouting pressure range is 1.2-1.8 MPa, and the slurry flow rate is 18-28 L / min. Furthermore, preset sodium silicate-cement-based dual-liquid slurry ratios are designed for different geological regions: for conventional areas, the volume ratio of sodium silicate solution to cement slurry is 1:1.6, with a water-cement ratio of 0.7; for high-permeability areas, the volume ratio is 1:1.3, with a water-cement ratio of 0.65. The addition of temperature-sensitive admixtures at normal temperatures is 1.2% of the total dual-liquid slurry weight.

[0060] like Figure 4 As shown, the grouting construction process

[0061] Drilling and Grouting: After drilling a 90mm diameter grouting hole as per design requirements, composite grout injection began. During construction, a real-time monitoring system continuously monitored geotechnical parameters and temperature changes. When working in a highly permeable area (porosity 32%, permeability 0.15cm / s), the system automatically increased the nozzle diameter from 22mm to 28mm, increased the slurry flow rate from 20L / min to 26L / min, and added a thickener to increase the slurry viscosity from 16s to 23s, effectively preventing slurry loss and ensuring effective filling.

[0062] Temperature Adaptation: On the evening of the third day of construction, temperature sensors detected a temperature drop from 28°C to 15°C within 1.5 hours, a rate of change of 8.7°C / hour, exceeding the preset threshold of 5°C / hour. At this point, a graded compensation mechanism activated, rapidly heating the heating wires in the grouting pipeline to maintain the slurry temperature at around 20°C. The release of the accelerating coagulant component of the temperature-sensitive admixture increased from 1.2% to 1.4%, shortening the initial setting time of the slurry from 2 hours to 1.6 hours, ensuring the smooth progress of grouting operations in low-temperature environments.

[0063] like Figure 5 As shown, post-construction inspection and refilling

[0064] Quality Inspection: 72 hours after grouting, a comprehensive inspection of the curtain was conducted using a fusion of 3D laser scanning and ultrasonic tomography. The scan revealed a structurally loose area of ​​approximately 8 cubic meters located near the fracture zone. A borehole water pressure test revealed a permeability coefficient of 0.045 cm / s, exceeding the design requirement of 0.025 cm / s.

[0065] Regrouting: Digital twin model analysis determined that the defect was caused by excessive permeability in this area and insufficient initial grouting pressure. The construction team developed a regrouting plan: adjusting the volume ratio of sodium silicate solution to cement slurry to 1:1.8, setting the water-cement ratio to 0.62, adding nano-scale expansive filler material, which accounts for 1.6% of the total weight of the dual-liquid slurry, and increasing the grouting pressure to 2.0 MPa. After the regrouting was completed, retesting showed that the permeability coefficient in this area had dropped to 0.018 cm / s, completely resolving the structural looseness issue and ensuring that the overall quality of the curtain met design standards.

[0066] In summary, the curtain grouting construction method for canyon deposits, which can enhance structural strength, has shortened the curtain grouting construction period of this water conservancy project by 20% compared with traditional methods, reduced material waste by 18%, and significantly improved the curtain's anti-seepage performance and structural strength, effectively ensuring the project's safety and durability.

[0067] Next, a canyon deposit curtain grouting construction device capable of enhancing structural strength according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0068] Figure 6 It is a block diagram of a canyon deposit curtain grouting construction device capable of enhancing structural strength according to an embodiment of the present invention.

[0069] like Figure 6 As shown, the canyon deposit curtain grouting construction device 10 capable of enhancing structural strength includes: an acquisition module 100 , a construction module 200 and a processing module 300 .

[0070] Among them, the acquisition module 100 is used to obtain the rock and soil porosity, permeability and temperature change rate of the canyon accumulation area; the construction module 200 is used to construct a geological model of the accumulation body according to the rock and soil porosity, permeability and temperature change rate, and determine the grouting parameters based on the geological model of the accumulation body, wherein the grouting parameters include but are not limited to grouting pressure, slurry flow rate and slurry ratio; the processing module 300 is used to drill grouting holes according to the grouting parameters, inject the composite slurry into the grouting holes, monitor and adjust the grouting parameters in real time, and adjust the slurry performance according to temperature changes. After the grouting is completed, the structural integrity and impermeability of the curtain body are tested and evaluated. If it does not meet the requirements, supplementary grouting treatment is carried out.

[0071] It should be noted that the above explanation of the embodiment of the canyon deposit curtain grouting construction method that can enhance the structural strength is also applicable to the canyon deposit curtain grouting construction device that can enhance the structural strength of this embodiment, and will not be repeated here.

[0072] The canyon deposit curtain grouting construction device, which can enhance structural strength, proposed in an embodiment of the present invention, obtains core parameters such as the porosity, permeability, and temperature change rate of the deposit rock and soil to construct a realistic geological model. This provides a reliable basis for scientifically determining parameters such as grouting pressure, slurry flow rate, and ratio, ensuring that the grouting scheme is adaptable to complex geological conditions from the source. During grouting construction, the grouting parameters are dynamically adjusted through real-time monitoring, and the slurry properties are flexibly adapted according to temperature changes, forming an adaptive adjustment mechanism for the grouting process. This effectively addresses variable interference during construction and ensures stable and efficient grouting operations. After grouting is completed, the curtain structure integrity and impermeability are comprehensively tested and evaluated. If it does not meet the requirements, additional grouting is immediately carried out, forming a closed-loop control of grouting quality. Through precise geological modeling, dynamic parameter regulation, and closed-loop quality control, the curtain structure integrity and impermeability are significantly improved, and the adaptability of grouting construction to complex working conditions is significantly improved, significantly reducing the cost and construction period of subsequent repairs, and effectively ensuring the safe, economical, and efficient construction of water conservancy and hydropower projects. This solves the problems in the prior art such as uneven strength of grouting structures in complex geological environments and the influence of temperature changes on slurry performance.

[0073] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0074] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "N" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0075] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or N executable instructions for implementing a custom logical function or step of a process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention pertain.

[0076] It should be understood that various components of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiment, the N steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, it can be implemented using any one or a combination of the following technologies known in the art: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application-specific integrated circuits having suitable combinational logic gate circuits, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0077] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

Claims

1. A curtain grouting construction method for canyon deposits that can enhance structural strength, characterized in that: The following steps are involved: Obtain the rock porosity, permeability and temperature change rate of the canyon deposit area; A geological model of the accumulation body is constructed based on the porosity, permeability and temperature change rate of the rock and soil, and grouting parameters are determined based on the geological model of the accumulation body, wherein the grouting parameters include but are not limited to grouting pressure, slurry flow rate and slurry ratio; wherein the geological model of the accumulation body is constructed based on the porosity, permeability and temperature change rate of the rock and soil, including: spatial interpolation processing of the rock and soil porosity and permeability based on the Kriging interpolation method to generate a porosity distribution field and a permeability distribution field; based on a geographic information system platform, a three-dimensional geological structure model of the canyon accumulation body is constructed in combination with topographic and geomorphological data; through indoor temperature control experiments, the porosity and permeability change patterns of the rock and soil under different temperature conditions are obtained, and a quantitative relationship model between temperature change and the rock and soil porosity and permeability is established; the quantitative relationship model is embedded in the three-dimensional geological structure model to construct a temperature-rock and soil characteristic coupled accumulation body geological model; the geological model of the accumulation body is verified based on field monitoring data, and the differences between the rock and soil porosity, permeability and temperature distribution predicted by the model are compared with the actual monitoring values, and the model parameters are determined and optimized; Drill grouting holes according to the grouting parameters, inject the composite slurry into the grouting holes, monitor and adjust the grouting parameters in real time, and adjust the slurry performance according to temperature changes. After the grouting is completed, the structural integrity and impermeability of the curtain body are tested and evaluated. If they do not meet the requirements, re-grouting is carried out. Injecting the composite slurry into the grouting hole includes: monitoring the porosity, permeability, and temperature change rate of the rock and soil, and automatically adjusting the nozzle diameter and the slurry flow rate; if the rock and soil porosity is greater than a first preset porosity, increasing the nozzle diameter and appropriately increasing the slurry flow rate; if the rock and soil porosity is less than a second preset porosity, reducing the nozzle diameter and reducing the slurry flow rate; if the permeability is greater than the first preset permeability, increasing the nozzle diameter, increasing the injection amount of the slurry, and increasing the viscosity of the slurry; if the permeability is less than the second preset permeability, reducing the nozzle diameter and increasing the injection pressure of the slurry; Among them, the structural integrity and impermeability of the curtain body are tested and evaluated. If they do not meet the requirements, re-grouting treatment is carried out, including: based on the fusion technology of three-dimensional laser scanning and ultrasonic tomography, the surface and internal structure of the curtain body are stereoscopically detected, and a three-dimensional visualization model of the curtain body is generated. Combined with the drilling water pressure test data, the anti-permeability performance of the curtain body is numerically simulated to determine whether it meets the design requirements; among them, if it is assessed that the curtain body has loose structural areas or the permeability coefficient exceeds the standard, the cause of the defect is analyzed through the digital twin model, and a targeted re-grouting plan is formulated; during re-grouting, the ratio of the re-grouting grouting liquid and the grouting pressure are automatically adjusted according to the porosity and permeability data of the defective area, and nano-scale expansive filling materials are added to the re-grouting grouting liquid to enhance the density of the curtain body; after the re-grouting is completed, a re-inspection is carried out until the structural integrity and impermeability of the curtain body meet the standards.

2. The curtain grouting construction method for canyon deposits capable of enhancing structural strength according to claim 1 is characterized in that: The composite slurry consists of sodium silicate-cement-based double liquid slurry and a temperature-sensitive admixture.

3. The curtain grouting construction method for canyon deposits capable of enhancing structural strength according to claim 2 is characterized in that: The sodium silicate-cement-based two-liquid slurry is prepared by mixing sodium silicate solution and cement slurry in a volume ratio of 1:(1-2), with a water-cement ratio of 0.5-0.

8. The addition amount of the temperature-sensitive admixture is 0.5%-2% of the total mass of the sodium silicate-cement-based two-liquid slurry.

4. The curtain grouting construction method for canyon deposits capable of enhancing structural strength according to claim 1 is characterized in that: Adjust slurry properties according to temperature changes, including: When it is detected that the temperature change rate exceeds a preset threshold, a hierarchical compensation mechanism is triggered, wherein the hierarchical compensation mechanism includes: When a rapid temperature drop is detected, the heating wire installed in the grouting pipeline is activated to quickly preheat the grouting pipeline and the internal slurry, increasing the release of the accelerating component in the temperature-sensitive admixture to 1%-1.5% of the total mass of the sodium silicate-cement-based two-liquid slurry; When a rapid temperature rise is detected, the slurry is cooled to reduce the release amount of the accelerating component in the temperature-sensitive admixture to 0.3%-0.5% of the total mass of the sodium silicate-cement-based two-liquid slurry.

5. A curtain grouting construction device for canyon deposits capable of enhancing structural strength, characterized in that: include: Acquisition module, used to obtain the rock porosity, permeability and temperature change rate of the canyon accumulation area; a construction module for constructing a geological model of an accumulation body according to the porosity, permeability and temperature change rate of the rock and soil, and determining grouting parameters based on the geological model of the accumulation body, wherein the grouting parameters include but are not limited to grouting pressure, slurry flow rate and slurry ratio; wherein the geological model of the accumulation body according to the porosity, permeability and temperature change rate of the rock and soil is constructed, including: spatially interpolating the porosity and permeability of the rock and soil based on the Kriging interpolation method to generate a porosity distribution field and a permeability distribution field; constructing a three-dimensional geological structure model of the canyon accumulation body based on a geographic information system platform and combining topographic and geomorphological data; obtaining the porosity and permeability change patterns of the rock and soil under different temperature conditions through indoor temperature control experiments, and establishing a quantitative relationship model between temperature change and the porosity and permeability of the rock and soil; embedding the quantitative relationship model into the three-dimensional geological structure model to construct a geological model of the accumulation body coupled with temperature and rock and soil characteristics; verifying the geological model of the accumulation body according to field monitoring data, comparing the differences between the rock and soil porosity, permeability and temperature distribution predicted by the model and the actual monitored values, and determining and optimizing the model parameters; a processing module for drilling grouting holes according to the grouting parameters, injecting the composite slurry into the grouting holes, monitoring and adjusting the grouting parameters in real time, and adjusting the slurry properties according to temperature changes; after the grouting is completed, testing and evaluating the structural integrity and impermeability of the curtain body, and performing supplementary grouting if the requirements are not met; Injecting the composite slurry into the grouting hole includes: monitoring the porosity, permeability, and temperature change rate of the rock and soil, and automatically adjusting the nozzle diameter and the slurry flow rate; if the rock and soil porosity is greater than a first preset porosity, increasing the nozzle diameter and appropriately increasing the slurry flow rate; if the rock and soil porosity is less than a second preset porosity, reducing the nozzle diameter and reducing the slurry flow rate; if the permeability is greater than the first preset permeability, increasing the nozzle diameter, increasing the injection amount of the slurry, and increasing the viscosity of the slurry; if the permeability is less than the second preset permeability, reducing the nozzle diameter and increasing the injection pressure of the slurry; Among them, the structural integrity and impermeability of the curtain body are tested and evaluated. If they do not meet the requirements, re-grouting treatment is carried out, including: based on the fusion technology of three-dimensional laser scanning and ultrasonic tomography, the surface and internal structure of the curtain body are stereoscopically detected, and a three-dimensional visualization model of the curtain body is generated. Combined with the drilling water pressure test data, the anti-permeability performance of the curtain body is numerically simulated to determine whether it meets the design requirements; among them, if it is assessed that the curtain body has loose structural areas or the permeability coefficient exceeds the standard, the cause of the defect is analyzed through the digital twin model, and a targeted re-grouting plan is formulated; during re-grouting, the ratio of the re-grouting grouting liquid and the grouting pressure are automatically adjusted according to the porosity and permeability data of the defective area, and nano-scale expansive filling materials are added to the re-grouting grouting liquid to enhance the density of the curtain body; after the re-grouting is completed, a re-inspection is carried out until the structural integrity and impermeability of the curtain body meet the standards.

6. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the canyon deposit curtain grouting construction method capable of enhancing structural strength as described in any one of claims 1 to 4.

7. A computer-readable storage medium having a computer program or instruction stored thereon, characterized in that: When the computer program or instruction is executed by a processor, it is used to implement the canyon deposit curtain grouting construction method capable of enhancing structural strength as described in any one of claims 1-4.

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