Viscous shield muck foundation synchronous grouting utilization method and system, terminal and medium

Abstract

The invention discloses a viscous shield muck base synchronous grouting utilization method and system, a terminal and a medium. The method comprises the steps that the soil type soil property of a stratum corresponding to shield muck is obtained; when it is judged that the shield muck does not meet the soil filling standard according to the soil properties, mineral components of the shield muck are determined; obtaining a synchronous grouting performance requirement, and determining a target geopolymer according to the synchronous grouting performance requirement; obtaining a grouting material ratio according to the mineral components and the target geopolymer; and after the grouting material is obtained according to the grouting material ratio, the grouting material is injected into a gap between a tunnel and a stratum through a grouting system at the tail of a shield tunneling machine, and monitoring information of ground surface settlement and duct piece floating is obtained in the synchronous grouting and shield tunneling process. The waste muck generated in shield tunnel construction can be effectively treated, the resource utilization rate of the shield muck is increased, and the treatment cost and the influence on the environment are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of underground tunnel engineering, and in particular to a method, system, terminal and medium for synchronous grouting of a viscous shield slag foundation. Background Art

[0002] Clay soil is widely distributed, and the study of synchronous grouting of clay shield slag foundation has important theoretical value and engineering significance for the treatment of such slag. The earth pressure balance shield will produce a large amount of waste slag during the construction process. The waste slag not only occupies a large amount of space, but also generates high waste slag costs. During the transportation of slag, it is easy to cause pollution, and the noise generated by transportation vehicles at night will also affect the lives of surrounding residents. In addition, the current method of slag treatment is still mainly transported and landfilled due to technical problems, which is primitive, backward, inefficient and expensive.

[0003] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0004] The main purpose of the present application is to provide a method, system, terminal and medium for synchronous grouting utilization of viscous shield slag foundation, aiming to solve the problem that in the prior art, shield slag is transported outside for landfill treatment, and the slag cannot be reused in an environmentally friendly manner, resulting in high processing costs and greater impact on the environment.

[0005] A first aspect of an embodiment of the present application provides a method for synchronous grouting of a cohesive shield slag foundation, the method comprising the following steps: obtaining the soil type and properties of the stratum corresponding to the shield slag; when it is judged that the shield slag does not meet the filling standard based on the soil type and properties, determining the mineral composition of the shield slag; obtaining the synchronous grouting performance requirements, and determining the target geopolymer based on the synchronous grouting performance requirements; obtaining a grouting material ratio based on the mineral composition and the target geopolymer; after obtaining the grouting material according to the grouting material ratio, injecting the grouting material into the gap between the tunnel and the stratum through the grouting system at the tail of the shield machine, and obtaining monitoring information of surface settlement and pipe segment floating during the synchronous grouting and shield excavation process.

[0006] Optionally, in one embodiment of the present application, the soil type and soil property is fine-grained soil; the soil type and soil property of the stratum corresponding to the shield slag is obtained as follows: if the soil layer corresponding to the shield slag is within the preset specification standard, then the stratum corresponding to the shield slag is fine-grained soil.

[0007] Optionally, in one embodiment of the present application, when it is judged that the shield slag does not meet the fill standard based on the soil type and properties, the mineral composition of the shield slag is determined, specifically: whether the shield slag meets the fill standard is judged based on the fine-grained soil; if it is judged that the shield slag does not meet the fill standard based on the fine-grained soil, a mineral composition test is performed on the shield slag to obtain the mineral composition of the shield slag.

[0008] Optionally, in one embodiment of the present application, judging whether the shield slag meets the fill standard based on the fine-grained soil specifically includes: performing a triaxial shear test on the fine-grained soil to obtain shear strength; judging whether the shear strength reaches the strength index of slag; if the shear strength does not reach the strength index of slag, judging that the shield slag does not meet the fill standard; if the shear strength reaches the strength index of slag, judging that the shield slag meets the fill standard.

[0009] Optionally, in one embodiment of the present application, if it is judged that the shield slag does not meet the filling standard based on the fine-grained soil, a mineral composition test is performed on the shield slag to obtain the mineral composition of the shield slag, and then it also includes: if the gravel in the mineral composition does not meet the processing specification standard, the gravel is ground until the gravel meets the processing specification standard.

[0010] Optionally, in one embodiment of the present application, determining the target geopolymer according to the synchronous grouting performance requirement specifically includes: obtaining on-site construction requirements and geopolymer cost requirements, and selecting precursors and activators in the geopolymer according to the on-site construction requirements and the geopolymer cost requirements to obtain a plurality of different geopolymers; conducting indoor slurry performance testing on a plurality of the geopolymers to obtain test performance corresponding to each of the plurality of the geopolymers; and determining the target geopolymer from the plurality of the geopolymers according to the synchronous grouting performance requirement and the plurality of the test performances.

[0011] Optionally, in one embodiment of the present application, the grouting material ratio is obtained according to the mineral composition and the target geopolymer, specifically including: obtaining the dosage range of each raw material in the synchronous grouting according to the mineral composition and the target geopolymer; forming multiple groups of material ratios according to the dosage range of each raw material; testing the multiple groups of material ratios, and determining the grouting material ratio from the multiple groups of material ratios.

[0012] The second aspect of the embodiment of the present application further provides a synchronous grouting utilization system for a viscous shield slag foundation, wherein the synchronous grouting utilization system for a viscous shield slag foundation comprises: The stratum soil analysis module is used to obtain the soil type and properties of the stratum corresponding to the shield slag; A mineral composition determination module, for determining the mineral composition of the shield slag when it is determined that the shield slag does not meet the fill standard according to the soil type and soil property; A geopolymer determination module, used to obtain synchronous grouting performance requirements and determine target geopolymers according to the synchronous grouting performance requirements; A material ratio determination module, used for obtaining a grouting material ratio according to the mineral composition and the target geopolymer; The grouting monitoring module is used to inject the grouting material into the gap between the tunnel and the stratum through the tail grouting system of the shield machine after obtaining the grouting material according to the grouting material ratio, and obtain monitoring information of surface settlement and pipe segment floating during the synchronous grouting and shield excavation process.

[0013] The third aspect of the embodiment of the present application also provides a terminal, wherein the terminal includes: a memory, a processor, and a program for synchronous grouting of a viscous shield slag foundation stored in the memory and executable on the processor, wherein the program for synchronous grouting of a viscous shield slag foundation implements the steps of the method for synchronous grouting of a viscous shield slag foundation as described above when executed by the processor.

[0014] The fourth aspect of the embodiment of the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a program for utilizing synchronous grouting of a viscous shield slag foundation, and when the program for utilizing synchronous grouting of a viscous shield slag foundation is executed by a processor, the steps of the method for utilizing synchronous grouting of a viscous shield slag foundation as described above are implemented.

[0015] Beneficial effects: The present application provides a method, system, terminal and medium for synchronous grouting utilization of cohesive shield slag foundation. The present application determines the slag that can be reused by synchronous grouting by analyzing the soil type and properties of the shield slag analysis layer, and obtains the optimal grouting material ratio by determining the slag mineral composition, geopolymer and grouting performance requirements. Finally, the application is actually applied and monitored, so as to effectively treat the waste slag generated in the shield tunnel construction, improve the resource utilization rate of the shield slag, and reduce the treatment cost and the impact on the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a flow chart of a preferred embodiment of the synchronous grouting utilization method of the viscous shield slag foundation of the present application; Figure 2 It is a flowchart of specific implementation steps of the entire execution process in a preferred embodiment of the method for synchronous grouting of slag foundation of a viscous shield machine of the present application; Figure 3 It is a schematic diagram of the flow of grouting monitoring in a preferred embodiment of the method for synchronous grouting of slag foundation of a viscous shield in the present application; Figure 4 It is a monitoring segment position diagram in a specific embodiment of the synchronous grouting utilization method of the viscous shield slag foundation of the present application; Figure 5 It is a layout diagram of the surface monitoring points in a specific embodiment of the synchronous grouting utilization method of the viscous shield slag foundation of the present application; Figure 6 It is a schematic diagram of horizontal scale measurement in a specific embodiment of the method for synchronous grouting of slag foundation of a viscous shield in the present application; Figure 7 This is a diagram of on-site monitoring results in a specific embodiment of the synchronous grouting utilization method for viscous shield slag foundation of the present application; Figure 8 It is a structural diagram of a preferred embodiment of the synchronous grouting utilization system for viscous shield slag foundation of the present application; Fig. 9 This is a structural diagram of a preferred embodiment of the terminal of this application.

[0018] Description of reference numerals: 100. Strata soil analysis module; 200. Mineral composition determination module; 300. Geopolymer determination module; 400. Material ratio determination module; 500. Grouting monitoring module. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and effect of the present application clearer and more specific, the technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. The described embodiments are only possible technical implementations of the present application, not all possible implementations. Based on the embodiments in the present application, those skilled in the art can completely combine the embodiments of the present application to obtain other embodiments without creative work, and these embodiments are also within the scope of protection of the present application.

[0020] While the shield method helps the efficient construction of subways, the waste slag generated during its construction process also troubles the construction of modern urban civilization. In the face of this prominent problem, an effective way is to reuse the slag as a resource. At present, the research on clay strata is mainly focused on replacing bentonite in synchronous grouting materials with clay, but its resource utilization rate still needs to be improved. In addition, the research on the reuse of slag synchronous grouting is mainly based on the use of cement for solidification treatment. From the perspective of low-carbon and environmental protection, there is relatively little research on synchronous grouting materials with slag-based polymers as cementitious materials under the premise of meeting the performance requirements of synchronous grouting slurry.

[0021] The following describes the synchronous grouting utilization method, system, terminal and medium of the viscous shield slag foundation of the embodiment of the present application with reference to the accompanying drawings. In view of the problem that the shield slag in the above-mentioned related technology is transported outside for landfill treatment, and the slag cannot be reused in an environmentally friendly way, resulting in high processing costs and a large impact on the environment, the present application provides a synchronous grouting utilization method for the viscous shield slag foundation. In this method, the slag that can be reused by synchronous grouting is determined by analyzing the soil type and soil properties of the shield slag analysis soil layer, and the optimal grouting material ratio is obtained by determining the mineral composition, geopolymer and grouting performance requirements of the slag, and finally it is actually applied and monitored, so that the waste slag generated in the construction of the shield tunnel can be effectively treated, the resource utilization rate of the shield slag can be improved, and the processing cost and the impact on the environment can be reduced. As a result, the technical problem that the shield slag in the related technology is transported outside for landfill treatment, and the slag cannot be reused in an environmentally friendly way, resulting in high processing costs and a large impact on the environment is solved.

[0022] This application collects and analyzes shield slag to determine the soil type and soil properties of the stratum, and then further determines the mineral composition of the shield slag based on the soil type and soil properties. Combined with the actual on-site synchronous grouting performance requirements and geopolymer costs, the type of geopolymer is determined, and the optimal ratio is determined by testing the grouting materials. Finally, the slurry performance under the optimal ratio is compared and analyzed with the actual performance requirements of the on-site slurry, and finally, the surface settlement and segment flotation are monitored through on-site application.

[0023] The technical solution of the present application is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0024] The method for synchronous grouting of viscous shield slag foundation described in the preferred embodiment of the present application is as follows: Figure 1 As shown, the synchronous grouting method for viscous shield slag foundation comprises the following steps: In step S101, the soil type and properties of the stratum corresponding to the shield slag are obtained to determine whether the foundation is suitable for synchronous grouting and reuse.

[0025] In a possible implementation, the soil type and property is fine-grained soil. If the soil layer corresponding to the shield slag is within a preset standard, then the stratum corresponding to the shield slag is fine-grained soil.

[0026] Specifically, the present application analyzes the soil type and soil properties of the stratum through shield slag. To determine the soil type and soil properties of the stratum, if the content of particles larger than 0.075 mm is greater than 50% of the soil mass, then this type of stratum soil is coarse-grained soil, and this type of slag is not used for subsequent synchronous grouting; if the content of particles smaller than 0.075 mm is greater than 50% of the soil mass, the shear strength of the slag is tested using a triaxial shear test. If the slag strength index meets the landfill standard, direct landfill treatment can be considered; if it does not meet the requirements, the slag has a relatively large fluidity, and synchronous grouting can be considered for such stratum slag for reuse.

[0027] In one possible implementation, Figure 2 As shown, a triaxial shear test is performed on the fine-grained soil to obtain the shear strength; it is determined whether the shear strength reaches the strength index of the slag; if the shear strength does not reach the strength index of the slag, it is determined that the shield slag does not meet the fill standard; if the shear strength reaches the strength index of the slag, it is determined that the shield slag meets the fill standard.

[0028] Specifically, the shear strength of shield slag is tested through a triaxial shear test, and this shear strength is compared with the "slag strength standard" or "landfill standard", which is determined based on a comprehensive combination of factors such as engineering experience, geological conditions, and the performance requirements of grouting materials. If the shear strength of the slag meets or exceeds this standard, then this slag may have sufficient strength and can be directly landfilled without the need for synchronous grouting; if the shear strength of the slag does not meet this standard, that is, the strength is low and the fluidity is greater, then this slag is more suitable for synchronous grouting reuse. In other words, the slag for synchronous grouting reuse in this application is slag in fine-grained soil whose shear strength does not meet the landfill standard.

[0029] In step S102, the mineral composition of the shield slag is determined according to the soil type and soil property, and the replacement object and dosage level of the slag in the synchronous grouting material are determined.

[0030] In a possible implementation, whether the shield slag meets the fill standard is judged based on the fine-grained soil. If it is judged that the shield slag does not meet the fill standard based on the fine-grained soil, a mineral composition test is performed on the shield slag to obtain the mineral composition of the shield slag.

[0031] In one possible implementation, Figure 2As shown, if the gravel in the mineral component does not meet the processing specification standard, the gravel is ground until the gravel meets the processing specification standard.

[0032] Specifically, if the clay mineral content of the soil is high, it can replace the bentonite in the synchronous grouting. Since the proportion of bentonite in conventional synchronous grouting is relatively small, the content of slag should not be set too high compared with the content of other materials such as sand when designing the preliminary slurry ratio test. On the contrary, if the soil is rich in hard minerals (such as quartz and feldspar), it can be considered to replace the sand in the synchronous grouting material. In view of the large proportion of sand in conventional synchronous grouting materials, the content of slag can be appropriately increased at this time. By reasonably adjusting the content of slag, the performance of synchronous grouting materials can be optimized to meet engineering needs. In addition, if the clay soil contains gravel larger than 5mm, the gravel in the slag can be ground by a wet grinder before the next step of processing.

[0033] Furthermore, if the montmorillonite content is not less than 50%, and the illite and kaolinite contents are about 20% and 10% respectively, the slag soil can replace the bentonite in the synchronous grouting. If the content of hard minerals (such as quartz and feldspar) in the soil is high (usually greater than 40%) and the particle size distribution is appropriate, it can replace the sand in the synchronous grouting material.

[0034] It is understandable that the mineral composition of shield slag directly affects its physical and chemical properties, thus determining whether it is suitable as a component of grouting materials. By analyzing the mineral composition, the content of clay minerals, hard minerals (such as quartz, feldspar), etc. in the slag is understood, which is crucial for subsequent material proportioning and performance optimization. During the analysis process, appropriate analytical techniques (such as X-ray diffraction, scanning electron microscopy, etc.) are used to determine the mineral composition of the slag. The analysis results will provide the proportions and types of various minerals in the slag. Based on the analysis results, the potential use of the slag in grouting materials is determined. This application analyzes the mineral composition of shield slag to understand the physical and chemical properties of the slag, thereby determining its potential use in grouting materials and dosage adjustment strategies.

[0035] In step S103, the synchronous grouting performance requirement is obtained, and the target geopolymer is determined according to the synchronous grouting performance requirement. According to the grouting performance requirement and cost considerations, a suitable geopolymer material is selected.

[0036] In one possible implementation, on-site construction requirements and geopolymer cost requirements are obtained, and according to the on-site construction requirements and the geopolymer cost requirements, precursors and activators in the geopolymer are selected to obtain a plurality of different geopolymers; indoor slurry performance tests are performed on the plurality of geopolymers to obtain the test performance corresponding to each of the plurality of geopolymers; and a target geopolymer is determined from the plurality of geopolymers according to the synchronous grouting performance requirements and the plurality of test performances.

[0037] Specifically, due to the wide variety of geopolymers (common geopolymers include fly ash-based polymers, slag-based polymers, kaolin-based polymers, volcanic ash-based polymers, etc.), when selecting precursors and activators in geopolymers, under the premise of ensuring the safety of on-site construction, we must first clarify the actual on-site synchronous grouting performance requirements, then consider the cost of geopolymers, and finally determine the type of geopolymer through indoor slurry performance tests.

[0038] It is understandable that the specific performance that the grouting material needs to achieve is determined based on the geological conditions of shield construction, engineering requirements, and the performance indicators that the slurry needs to meet (such as setting time, strength, fluidity, etc.); the impact of different types of geopolymers on slurry performance is evaluated based on the changes in slurry performance that may be caused by the combination of different geopolymer precursors (such as slag powder, fly ash, steel slag, etc.) and activators (such as sodium silicate, slaked lime, sodium sulfate, etc.). Considering the procurement cost, transportation cost, and use cost of geopolymers during construction, select relatively low-cost geopolymers while ensuring that the slurry performance meets the requirements. Comprehensively consider the on-site grouting performance requirements and geopolymer costs, and determine the most suitable type of geopolymer through comparative analysis.

[0039] For example, when the site is a water-rich sandy stratum, the requirements for the slurry are similar to the double-liquid slurry, such as the slurry setting time requirement cannot be too long. At this time, slag powder with higher activity can be selected as a precursor, and sodium silicate can be selected as an alkali activator to meet the requirements of on-site slurry performance and construction safety.

[0040] Further, the following is an explanation of the selection process of geopolymers: Based on the on-site grouting construction requirements and geological conditions, the grouting cost is reduced while ensuring that the slurry performance meets the requirements. Geopolymer materials are mainly composed of precursors and alkali activators. When selecting precursors (slag powder, fly ash, steel slag, etc.), the industrial resource conditions around the shield construction site can be combined to give priority to local materials. For example, if there are steel production enterprises in the local area, slag powder has abundant resources and low transportation costs, and should be used as the preferred material. Alkali activators are mostly some chemical products. Their selection should not only focus on the construction cost, but also focus on their potential corrosiveness. Safety guidelines must be strictly followed to ensure the operability and safety of the materials in practical applications. Although a large number of studies have shown that sodium (potassium) hydroxide has a significant stimulating effect, the activators selected in this application are slaked lime and sodium sulfate, mainly based on the following considerations: sodium (potassium) hydroxide is highly corrosive, there are certain safety hazards in operation at the construction site, and the cost is relatively high. In contrast, slaked lime and sodium sulfate have the advantages of wide availability, low cost, and relatively safe operation, making them more suitable for on-site applications.

[0041] This application is based on the actual needs of the project and economic considerations. Through scientific evaluation methods and reasonable cost analysis, the most suitable type of geopolymer is determined. This process not only ensures that the grouting material can meet the construction requirements, but also can reduce construction costs to a certain extent and improve economic benefits.

[0042] In step S104, a grouting material ratio is obtained according to the mineral composition and the target geopolymer, and a grouting material combination with the best performance is obtained through experimental optimization.

[0043] In one possible implementation, the dosage range of each raw material in the simultaneous grouting is obtained based on the mineral composition and the target geopolymer; multiple groups of material proportions are formed based on the dosage range of each raw material; the multiple groups of material proportions are tested, and the grouting material proportion is determined from the multiple groups of material proportions.

[0044] Specifically, the optimal ratio of grouting materials is tested; after determining the dosage range of each material based on the field investigation results, the basic characteristics of the slag and the indoor slurry performance test, the response surface methodology can be used to analyze the synergistic effect of various factors, and a set of optimal ratios of grouting materials can be obtained in combination with the multi-objective optimization method.

[0045] Furthermore, the following is an explanation of the process of determining the amount of sand: The amount of sand depends mainly on the mineral composition and particle size distribution of the shield slag. When the shield slag contains more coarse particles or hard minerals (such as quartz and feldspar), the amount of sand can be reduced when the experimental design method is used to formulate the plan, and the amount of slag can be increased accordingly. The multi-objective optimization design method is further used for analysis and research to obtain the optimal slurry ratio that meets the construction requirements.

[0046] Furthermore, the following is an explanation of the on-site slurry preparation process: When preparing the slurry on-site, since the geopolymer will react with water, it may cause uneven mixing of the subsequent slag and geopolymer. Therefore, in the order of preparing the slurry, the slag mud needs to be prepared in advance, and then the geopolymer is added. When the slump value is greater than the similarity evaluation index S (the S value can be determined by shear test), it means that the slag has high fluidity and its internal structure is relatively loose. The slag is directly stirred into mud according to the slag moisture content obtained by optimizing the slurry ratio on site, and then mixed with other additives for use. On the contrary, it may be necessary to pre-treat the slag by soaking it in water, disperse its structure, and then prepare it into slag mud according to the moisture content, and finally prepare the synchronous grouting material with additives.

[0047] It is understandable that the dosage range of various raw materials (such as water, slag, sand, slag powder, sodium sulfate and slaked lime) is preliminarily determined based on the results of the field investigation, the basic characteristics of the slag (such as mineral composition, particle size distribution, etc.) and the indoor slurry performance test. Next, the response surface method (RSM) is used to analyze the synergistic effect between various factors (i.e., the dosage of various raw materials) (the response surface method is a statistical method used to study the influence of multiple variables on one or more response variables and find the optimal operating conditions). Combined with the multi-objective optimization method, the slurry performance under different dosage combinations is further analyzed to find the optimal ratio that meets all performance requirements (such as strength, fluidity, setting time, etc.). Finally, the actual effect of the selected optimal ratio is verified through laboratory tests or small-scale field tests, including slurry performance tests (such as strength tests, fluidity tests, etc.) and application effect evaluation under actual engineering conditions.

[0048] In step S105, after the grouting material is obtained according to the grouting material ratio, the grouting material is injected into the gap between the tunnel and the stratum through the tail grouting system of the shield machine, and the monitoring information of the surface settlement and the floating of the pipe segment is obtained during the synchronous grouting and shield excavation process to verify the grouting effect and adjust the grouting parameters.

[0049] Specifically, Figure 3 As shown in the figure, the slurry performance under this optimal ratio was tested by indoor test, and compared with the actual performance requirements of the slurry on site. Finally, the surface settlement and segment floating were monitored through on-site application. In the synchronous grouting process of shield tunnel construction, surface settlement and segment floating are important indicators for judging the quality and effect of grouting. By monitoring and analyzing these two indicators, the grouting parameters can be adjusted and the grouting scheme can be optimized to control the surface settlement within the design allowable range, ensure the stability of the segment position, and minimize the floating phenomenon.

[0050] It is understandable that the purpose of comparing and analyzing the slurry properties (such as setting time, strength, fluidity, etc.) under this optimal ratio with the slurry properties actually required on site is to ensure that the optimal ratio obtained in the laboratory is also applicable in actual applications. After confirming that the optimal ratio meets the actual needs, the field application means that the grouting material will be prepared on site according to the optimal ratio and injected into the stratum of the shield tunnel. During the simultaneous grouting and shield excavation, the surface settlement and the floating of the pipe segments are monitored in real time. The surface settlement is one of the important indicators for evaluating the grouting effect. By monitoring the surface settlement, it can be judged whether the grouting has effectively controlled the deformation of the stratum; the floating of the pipe segment is also an important indicator that needs to be paid attention to, because excessive floating may affect the stability and safety of the tunnel. Collect and analyze the monitoring data of surface settlement and pipe segment floating, and compare these data with the preset control standards. If the monitoring data shows that the grouting effect is not ideal (such as excessive surface settlement or excessive floating of the pipe segments), it is necessary to adjust the grouting parameters (such as grouting pressure, grouting speed, grouting materials, etc.) according to the data analysis results, and optimize the grouting plan. Through continuous adjustment and optimization, the grouting effect will meet the design requirements and control standards.

[0051] The present invention further illustrates the specific embodiment of the synchronous grouting method for the viscous shield slag foundation through a field application case: a field test is carried out in a shield section of Line A of the A subway, and the 672 ring segments of the entry line are selected as the test rings of the new grouting material (the position of the segments in the stratum is as follows Figure 4 Finally, the grouting effect was verified by comparing the performance of the conventional grouting slurry on site and monitoring the surface settlement and the floating value of the pipe segment.

[0052] Material calculation preparation stage: Calculate the mass of various raw materials (water, slag, sand, slag powder, sodium sulfate and slaked lime) required according to the grouting volume of the first ring on site and the optimal ratio of the synchronous grouting materials. Determine the moisture content of the slag in the slag pool on site, and calculate the slag volume according to the moisture content formula combined with the dry slag mass calculated previously. Temporarily store the required raw materials in the powder storage tank.

[0053] Material placement and mixing stage: The calculated and weighed slag is placed in a compulsory mixer for mixing. If the moisture content of the slag is too low, water is added to the mixer according to the target moisture content of the slag, and the mixing is continued until the slag is uniform and slurry-like. Then the calculated and weighed slag powder is added to the slag slurry until the mixture is uniform, and then the weighed sodium sulfate and slaked lime are added to the above mixture. Note that the stimulating material needs to be added while stirring to prevent the slurry from lumps. Finally, all the above materials are mixed evenly to form a new type of grouting material.

[0054] Tank truck mixing and transportation stage: The mixing tank truck stops at the material receiving position under the mixer to ensure that the grouting material can be smoothly transferred to the tank truck. After the loading is completed, the mortar transport mixing tank truck is used to transport the new grouting material to the mortar tank opening of the middle plate of the shield starting shaft on site.

[0055] On-site grouting construction: A special tank truck is used to accurately transport the slurry of the new grouting material to the mortar tank of the shield trolley. Subsequently, the slurry will be evenly injected into the stratum to ensure the stability and safety of the construction. Synchronous grouting is carried out simultaneously with shield excavation, and during the on-site shield excavation process, it is completed through the synchronous grouting system described above.

[0056] On-site monitoring plan and monitoring point layout plan: Two detection plans are adopted in the application case shown in this application, namely surface monitoring and segment monitoring.

[0057] For surface monitoring: the layout principles and methods of on-site surface monitoring mainly refer to the "Technical Code for Monitoring of Urban Rail Transit Projects" (GB 50911-2013). The layout of surface settlement monitoring points is as follows: A. It is advisable to use drilling to bury the points. The burial depth should reach the original soil layer. The diameter should not be less than 120mm. The diameter of the threaded steel bar should be 18mm-22mm. Concrete should be used below the buried point to fix it to the surrounding soil through the threaded steel bar. The consolidation length of the concrete should be 300mm, and medium sand should be used for backfilling. B. The threaded steel mark point is not less than 1000mm. The measuring point is punched into the hole, with an exposed height of 20mm-30mm. A plastic protective cover is installed on it. The diameter of the protective cover is not less than 120mm, and the bottom is 5cm-10cm of concrete.

[0058] In addition to the aforementioned test rings, the entry lines 667, 671, 673 and 677 were selected as comparison rings, and 7 measuring points were arranged on the surface of each cross section, such as Figure 5 As shown in (a); the monitoring points of each ring are arranged at the same spacing on the surface along the cross-section direction, among which the measurement points of the test ring 672 are arranged on the surface along the cross-section direction as shown in the figure. Figure 5 As shown in (b) in .

[0059] The layout of the pipe segment monitoring is as follows: The shield tunnel is lined with a flat single-layer prefabricated reinforced concrete pipe segment. The outer diameter of the pipe segment is 6200 mm, the inner diameter is 5500 mm, the thickness is 350 mm, the ring width is 1200 mm, and the longitudinal joint contact surface of the pipe segment is provided with a tongue and groove. The "3+2+1" block form is adopted, staggered assembly, 16 longitudinal connection bolts, and 12 circumferential bolts. According to the design, the pipe segment is divided into a standard lining ring, a left-turn lining ring, and a right-turn lining ring. The shield pipe segment adopts C50 high-strength concrete, and the reinforcement is divided into four forms: 1, 2, 3, and 4, and the anti-seepage grade is P8. A four-ring special lining is set at the section connection channel, using the form of steel pipe segment + concrete pipe segment, all connected with M30 bent bolts.

[0060] In the application case, the horizontal ruler observation method is used to measure the posture of the shield tunnel segment. The specific operation is shown as follows: Figure 6 As shown. Considering the inner diameter of the formed segment, an aluminum alloy ruler with a length close to the inner diameter of the segment is selected, the center of the ruler is marked, and a reflective sheet is attached to its side. When measuring the segment posture, the ruler is placed horizontally on the target segment and accurately adjusted using a level to ensure its level. Furthermore, the center coordinates of the aluminum alloy ruler are measured using a total station, and the center coordinates of the segment are calculated based on the actual spatial geometric relationship between the ruler and the segment.

[0061] The horizontal ruler observation method is used to measure and calculate the coordinates of the center point of the assembled segment just when it is about to leave the shield tail. The target segment is then monitored regularly, and the real-time change of the segment's buoyancy is obtained through the difference in the vertical coordinates of the segment center.

[0062] like Figure 7 (a) and Figure 7 As shown in (b), the field measurement results are analyzed: the surface settlement curve of the cross section corresponding to the 672-ring segment using the new grouting material roughly conforms to the Peck curve (a mathematical expression based on experience and experimental data, used to describe the change law of stratum settlement during shield tunnel construction), where the maximum uplift is 5.2 mm, the maximum settlement is 4.6 mm, and the surface settlement curves of the monitored cross sections of the 667, 673 and 677 rings have similar trends, that is, the surface settlement at the same distance from the tunnel center is similar, and the maximum surface settlement does not exceed 20 mm. The surface settlement of the cross section corresponding to the 672-ring segment using the new grouting material meets the control requirements of the "Urban Rail Transit Engineering Measurement Specification" and the "Shield Method Tunnel Construction and Acceptance Specification". The floating values ​​of each ring segment are all around 50 mm, among which the floating value of the 672-ring segment is 47.6 mm, which meets the control requirements of the "Urban Rail Transit Engineering Measurement Specification" and the "Shield Method Tunnel Construction and Acceptance Specification".

[0063] Next, the synchronous grouting utilization system for viscous shield slag foundation proposed in accordance with the embodiment of the present application will be described with reference to the accompanying drawings.

[0064] Figure 8 It is a structural diagram of the synchronous grouting utilization system of the viscous shield slag foundation according to an embodiment of the present application.

[0065] like Figure 8 As shown, the synchronous grouting utilization system for viscous shield slag foundation includes: a stratum soil analysis module 100, a mineral composition determination module 200, a geopolymer determination module 300, a material ratio determination module 400 and a grouting monitoring module 500.

[0066] Specifically, the stratum soil analysis module 100 is used to obtain the soil type and soil property of the stratum corresponding to the shield slag; A mineral composition determination module 200, for determining the mineral composition of the shield slag when it is determined that the shield slag does not meet the fill standard according to the soil type and soil property; A geopolymer determination module 300 is used to obtain synchronous grouting performance requirements and determine target geopolymers according to the synchronous grouting performance requirements; A material ratio determination module 400 is used to obtain a grouting material ratio according to the mineral composition and the target geopolymer; The grouting monitoring module 500 is used to inject the grouting material into the gap between the tunnel and the stratum through the tail grouting system of the shield machine after obtaining the grouting material according to the grouting material ratio, and obtain monitoring information of surface settlement and pipe segment floating during the synchronous grouting and shield excavation process.

[0067] Fig. 9 This is a structural diagram of a terminal provided in an embodiment of the present application. The terminal may include: A memory 501 , a processor 502 , and a computer program stored in the memory 501 and executable on the processor 502 .

[0068] When the processor 502 executes the program, the synchronous grouting utilization method of the viscous shield slag foundation provided in the above embodiment is implemented.

[0069] Furthermore, the terminal further includes: The communication interface 503 is used for communication between the memory 501 and the processor 502 .

[0070] The memory 501 is used to store computer programs that can be executed on the processor 502 .

[0071] The memory 501 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0072] If the memory 501, the processor 502 and the communication interface 503 are implemented independently, the communication interface 503, the memory 501 and the processor 502 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus or an Extended Industry Standard Architecture (EIS) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 8 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0073] Optionally, in a specific implementation, if the memory 501, the processor 502 and the communication interface 503 are integrated on a chip, the memory 501, the processor 502 and the communication interface 503 can communicate with each other through an internal interface.

[0074] The processor 502 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0075] This embodiment also provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the method for synchronous grouting of a viscous shield slag foundation as described above is implemented.

[0076] One embodiment of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the present application Figure 1 A method for utilizing synchronous grouting of a viscous shield slag foundation provided in any of the corresponding embodiments.

[0077] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0078] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0079] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0080] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable storage medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, a "computer-readable storage medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples (non-exhaustive list) of computer-readable storage media include the following: an electrical connection with one or N wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable storage medium may even be paper or other suitable medium on which the program is printed, since the program can be obtained electronically by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways as necessary, and then storing it in a computer memory.

[0081] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above embodiment, N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0082] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0083] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0084] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

[0085] It should be understood that the application of the present application is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to this application.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A synchronous grouting method for viscous shield slag foundation, characterized in that: The synchronous grouting utilization method of the viscous shield slag foundation comprises: Obtain the soil type and properties of the corresponding stratum of shield slag; When it is determined according to the soil type and soil property that the shield tunneling slag does not meet the fill standard, determining the mineral composition of the shield tunneling slag; Acquiring synchronous grouting performance requirements, and determining target geopolymers according to the synchronous grouting performance requirements; According to the mineral composition and the target geopolymer, a grouting material ratio is obtained; After the grouting material is obtained according to the grouting material ratio, the grouting material is injected into the gap between the tunnel and the stratum through the tail grouting system of the shield machine, and monitoring information of surface settlement and pipe segment floating is obtained during the synchronous grouting and shield excavation process.

2. The synchronous grouting method for utilizing viscous shield slag foundation according to claim 1 is characterized in that: The soil type and property is fine-grained soil; The method of obtaining the soil type and soil property of the stratum corresponding to the shield slag is specifically as follows: If the soil layer corresponding to the shield slag is within the preset specification standard, then the stratum corresponding to the shield slag is fine-grained soil.

3. The synchronous grouting method for utilizing viscous shield slag foundation according to claim 2 is characterized in that: When it is determined according to the soil type and soil property that the shield slag does not meet the fill standard, the mineral composition of the shield slag is determined, specifically: It is judged whether the shield slag meets the filling standard according to the fine-grained soil. If it is judged that the shield slag does not meet the filling standard according to the fine-grained soil, a mineral composition test is performed on the shield slag to obtain the mineral composition of the shield slag.

4. The synchronous grouting method for utilizing viscous shield slag foundation according to claim 3 is characterized in that: The step of judging whether the shield slag meets the soil filling standard according to the fine-grained soil specifically includes: Performing a triaxial shear test on the fine-grained soil to obtain shear strength; Determining whether the shear strength reaches the strength index of the slag; If the shear strength does not reach the strength index of the slag, it is judged that the shield slag does not meet the fill standard; If the shear strength reaches the strength index of the slag, it is judged that the shield slag meets the filling standard.

5. The synchronous grouting method for utilizing viscous shield slag foundation according to claim 3 is characterized in that: If it is determined according to the fine-grained soil that the shield slag does not meet the fill standard, a mineral composition test is performed on the shield slag to obtain the mineral composition of the shield slag, and then the method further includes: If the gravel in the mineral component does not meet the processing specification standard, the gravel is ground until the gravel meets the processing specification standard.

6. The synchronous grouting method for utilizing viscous shield slag foundation according to claim 1 is characterized in that: Determining the target geopolymer according to the synchronous grouting performance requirement specifically includes: Obtaining on-site construction requirements and geopolymer cost requirements, and selecting precursors and activators in the geopolymer according to the on-site construction requirements and the geopolymer cost requirements to obtain a plurality of different geopolymers; Conducting indoor slurry performance test on the plurality of geopolymers to obtain the test performance corresponding to each of the plurality of geopolymers; A target geopolymer is determined from the plurality of geopolymers according to the synchronous grouting performance requirement and the plurality of test performances.

7. The synchronous grouting method for utilizing viscous shield slag foundation according to claim 1 is characterized in that: The method of obtaining a grouting material ratio according to the mineral composition and the target geopolymer specifically includes: According to the mineral composition and the target geopolymer, the dosage range of each raw material in the synchronous grouting is obtained; According to the dosage range of each raw material, multiple groups of material ratios are formed; The material proportions of the plurality of groups are tested, and the grouting material proportions are determined from the plurality of material proportions.

8. A synchronous grouting system for viscous shield slag foundation, characterized in that: The synchronous grouting and utilizing system for viscous shield slag foundation comprises: The stratum soil analysis module is used to obtain the soil type and properties of the stratum corresponding to the shield slag; A mineral composition determination module, for determining the mineral composition of the shield slag when it is determined that the shield slag does not meet the fill standard according to the soil type and soil property; A geopolymer determination module, used to obtain synchronous grouting performance requirements and determine target geopolymers according to the synchronous grouting performance requirements; A material ratio determination module, used for obtaining a grouting material ratio according to the mineral composition and the target geopolymer; The grouting monitoring module is used to inject the grouting material into the gap between the tunnel and the stratum through the tail grouting system of the shield machine after obtaining the grouting material according to the grouting material ratio, and obtain monitoring information of surface settlement and pipe segment floating during the synchronous grouting and shield excavation process.

9. A terminal, characterized in that: The terminal includes: a memory, a processor, and a synchronous grouting utilization program for cohesive shield slag soil foundation stored in the memory and executable on the processor. When the synchronous grouting utilization program for cohesive shield slag soil foundation is executed by the processor, the steps of the synchronous grouting utilization method for cohesive shield slag soil foundation as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a synchronous grouting utilization program for cohesive shield slag foundation, and when the synchronous grouting utilization program for cohesive shield slag foundation is executed by a processor, the steps of the synchronous grouting utilization method for cohesive shield slag foundation as described in any one of claims 1-7 are implemented.

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