12 results about "Volcanic ash" patented technology

The application provides a volcanic ash soil shearing capacity detection device, and relates to the technical field of soil shearing detection equipment.The device comprises a detection table, an upper shearing box, a lower shearing box, a positioning assembly, a horizontal pressure assembly, a vertical pressure assembly and a shearing detection assembly.The lower shearing box is slidingly connected to the detection table, and the upper shearing box is slidingly connected to the lower shearing box.A positioning assembly for limiting the position of the upper shearing box is installed in the lower shearing box.The horizontal pressure assembly is used to apply a horizontal thrust to one side of the lower shearing box.The vertical pressure assembly is used to apply a vertical pressure to the ash soil sample in the shearing groove.The shearing detection assembly is used to detect the shearing force of the ash soil sample.The positioning assembly can quickly unlock the fixation of the upper shearing box and the lower shearing box, and the unlocking operation is simple and convenient, so that the upper shearing box cannot move along the length direction of the detection table due to misoperation, the integrity of the ash soil sample in the two shearing grooves is maintained, and the accuracy of the detection of the shearing capacity of the ash soil sample is improved.

The application discloses a control method for large-diameter and large-gradient super-shallow-buried shield launching in a volcanic ash stratum, and the method comprises the following steps: step S1, calculating a stratum reinforcement range based on geological parameters, and reinforcing the stratum at the launching end by directional grouting; step S2, installing a multi-stage sealing device at a shield launching opening, and verifying the sealing property before the opening is broken; step S3, dynamically adjusting the thrust, torque and grouting parameters when the shield is excavated, and controlling the surface settlement to be less than or equal to 3 mm; and step S4, monitoring the shield posture and stratum deformation in real time, and adjusting the construction parameters through data feedback closed-loop regulation. The technical scheme aims to improve the reliability when a large-diameter, large-gradient and shallow-buried tunnel is constructed in a volcanic ash stratum.

The invention provides a multi-task data set construction method for volcanic ash cloud monitoring, and belongs to the technical field of remote sensing information intelligent extraction. According to the method, an atmospheric radiation transmission model and satellite remote sensing observation data are utilized, a high-quality data set which has physical mechanism support and is close to practical application is established, and a solid foundation is laid for training a volcanic ash cloud monitoring model with high precision and strong generalization ability. By comprehensively applying the atmospheric radiation transmission model and the multi-source satellite remote sensing product, on one hand, the radiation characteristics of the volcanic ash cloud under different particle sizes, concentrations, heights and background environments can be accurately simulated based on the atmospheric radiation transmission model, so that a volcanic ash cloud satellite observation data set covering various different scenes is generated; and on the other hand, multi-source satellite remote sensing data is introduced, a data set containing real satellite observation information of the volcanic ash cloud is automatically established, and a key real world reference is provided for model construction.

The application discloses a volcanic ash cloud multi-task monitoring method based on a Transformer and field adaptation, and relates to the technical field of volcanic ash cloud detection and parameter inversion. The application adopts an uncertain-based weighting mode combined with a multi-task loss function, and uses an Adam optimizer to minimize the loss function, so that the model can better capture the relationship between bands from a large amount of simulation data, and is transferred to a real scene, thereby realizing the simultaneous and accurate prediction of information such as the position of a volcanic ash cloud, the cloud top height of the volcanic ash cloud and the volcanic ash concentration.

The application provides a method and system for dynamically evaluating the risk of large-diameter shield tunneling in a volcanic ash stratum. The method includes: processing the identified key risk factors to obtain real-time risk scores, determining the influence of each risk factor on the overall risk through sensitivity analysis, and normalizing the initial weights; dynamically adjusting the initial weights based on the real-time risk scores and the sensitivity analysis index to form a comprehensive risk index; and combining the obtained comprehensive risk index with a dynamic risk heat map for risk assessment. This method dynamically adjusts the sensitivity analysis and risk heat map to quantify the impact of key risk factors, dynamically updates the risk status using real-time monitoring data, and provides scientific decision support for large-diameter shield tunneling in volcanic ash strata.

The invention discloses a volcanic accumulation layer foundation treatment method. The volcanic accumulation layer foundation treatment method specifically comprises the following steps of construction preparation; measuring and setting out; leveling the down-the-hole drill in place; the down-the-hole drill drills to form a hole to form a first drill hole; shifting the down-the-hole drill; a screw pile drilling machine is in place; a drill rod of the screw pile drilling machine drills downwards along the first drill hole to form a second drill hole; a mixture is injected into the second drill hole, and after the second drill hole is filled with the mixture, the drill rod is pumped and lifted to the earth surface at the specified speed; and the next pile is shifted and constructed. The construction method is applied to subgrade screw pile foundation treatment under the volcanic ash geology, efficient construction can be achieved through the method, the construction effect is good, and the overall method is economical. The method is simple and safe in construction, suitable for foundation treatment, especially for volcanic ash stratum conditions, high in applicability and capable of guaranteeing the construction quality of the screw pile.

The invention relates to the technical field of route management, in particular to a route influence analysis and evaluation method for multiple types of meteorological risks. Comprising the following steps that S100, input typhoon and volcanic ash related navigation notification messages are obtained and analyzed, meteorological key information is extracted, the meteorological key information comprises the meteorological occurrence position, the influence intensity and the moving trend, and the meteorological key information is converted into structural data; s200, according to the structured meteorological key information and the corresponding meteorological motion characteristics, constructing dynamic spatial position models under a plurality of different time dimensions in the future, and predicting the spatial distribution range of the meteorology in each time period through the dynamic spatial position models under the different time dimensions; and S300, acquiring space coordinate data of a target route, performing space conflict detection on the space coordinate data of the route and the dynamic space model under each time dimension, and identifying and outputting route segment information influenced by weather according to a conflict detection result.

The invention discloses a system and method for improving desert by transporting volcanic ash through foreign trade return no-load transport capacity, and belongs to the technical field of ecological restoration and cross-border logistics cooperation. The system comprises an overseas volcanic ash processing module, a return logistics integration module, a multimodal transport module, a desert improvement construction module, an ecological monitoring module and an income closed-loop module. According to the method, overseas high-quality volcanic ash resources are locked, foreign trade return no-load transport capacity in China is integrated, volcanic ash is transported to the northwest desert area at low cost through marine transportation-railway multimodal transportation, the volcanic ash and sandy soil are mixed and improved according to the depth of 15-25 cm and the proportion of 15%-20%, water-saving irrigation and vegetation reconstruction are matched, and desert-to-ecological land use and ploughing are achieved. According to the method, mass idle capacity can be activated, the desertification control cost can be greatly reduced, the soil quality can be rapidly improved, five strategic values of ecology, grains, logistics, carbon sink and industry are integrated, and the method is an original, subversive and sustainable important technical scheme suitable for the national level.

To protect critical infrastructure from the adverse effects of volcanic ashfall, a natural phenomenon in Japan, we aim to provide a long-life filter system that can be used even during prolonged volcanic ashfall, and to meet the demand for proposals for volcanic ash filter systems. This system will protect major facilities and equipment from atmospheric volcanic ash or fine dust, ensure business continuity in emergencies, and protect defense facilities of national security agencies. The goal is to provide a long-life atmospheric dust filter system that blocks volcanic ash and atmospheric dust, allowing essential equipment such as cooling systems for critical machinery and facilities to always function normally. [Solution] A filter device in which a substantially corrugated filter material is attached to the filter surface, characterized in that the filter material is made of a material that prevents deformation of the attached shape of the filter material by air passing through the filter surface.

The utility model discloses a kind of volcanic ash circulating device and circuit board manufacturing equipment, it is related to circuit board manufacturing technical field, wherein, volcanic ash circulating device includes cylinder body, stirring mechanism, reflux device and filter structure, cylinder body is equipped with containing cavity and with containing cavity communication feed inlet, containing cavity is used to store volcanic ash, stirring mechanism is used to stir the volcanic ash in containing cavity, reflux device includes reflux pipe, one end of reflux pipe is located above feed inlet, to flow back used volcanic ash to feed inlet, filter structure is placed at feed inlet, filter structure is used to filter the volcanic ash flowing to feed inlet by reflux pipe, by installing filter structure at feed inlet, filter foreign matter in volcanic ash, to avoid hole break phenomenon caused by foreign matter block hole.

A lost circulation composition is flowed to a lost circulation zone within a wellbore formed in a subterranean formation. The lost circulation composition includes volcanic ash, an epoxy resin, and a curing agent. The curing agent includes nitrogen. The curing agent crosslinks the epoxy resin to form a plug at the lost circulation zone. The plug prevents fluid from flowing from the wellbore into the subterranean formation through the plug at the lost circulation zone.

This disclosure methods of treating unconsolidated sand formations using a sealant composition, including volcanic ash, an epoxy resin, and a crosslinker.