Abstract: The present invention provides a foot frame bottom plate type fixed part, a sealed inner lining structure, an underground chamber, belonging to the field of compressed air energy storage technology. The skeleton includes a fixed bottom plate and an umbrella shaped tripod, which is equipped with a connecting part and an umbrella shaped part. The umbrella shaped part is set at the top of the connecting part. The umbrella shaped tripod is fixedly connected to the fixed bottom plate in the length direction, forming a semi open containment space clamp. The sealing inner lining structure includes an airtight layer and a foot rest bottom plate shaped fixed part. The underground chamber includes a concrete lining layer and a sealed lining structure. Its construction period is shorter than that of welded steel plates, and the cost is lower.

Abstract: The present invention provides a groove-type skeleton, a sealed lining structure, an underground gas storage, which belong to the technical field of compressed air energy storage. The groove-type skeleton includes a fixed bottom plate, which has a length direction and a width direction. The fixed bottom plate forms a semi-open receiving space along the length direction at the middle axis, and the top edge of at least one side of the semi-open receiving space extends inward to form a protrusion. The sealed lining structure includes an airtight layer and the groove-type skeleton. The underground gas storage includes a concrete lining layer and the sealed lining structure. The groove-type skeleton can be combined to form a sealed lining structure, which forms an underground gas storage. Its construction period is shorter than that of welded steel plates and its cost is lower.

Abstract: The present invention discloses a device and method for collecting heat bags and solidifying and filling calcareous sand foundation, belonging to the field of civil engineering geological treatment technology. The solar heat collection bag comprises a transparent and permeable part and an insulation material, wherein the insulation material comprises a heat absorbing layer, an insulation layer, and a fabric layer. The heat absorbing layer, insulation layer, and fabric layer are fixedly combined from top to bottom to form an integrated transparent and permeable part. The edge of the transparent and permeable part is the first edge, and the edge of the insulation material is the second edge; The transparent heat permeable part and insulation material are combined into one through the first and second edges, forming a containment space between the transparent heat permeable part and the insulation material, so that the medium contained in the containment space can be heated by solar energy.

Abstract: A multiphase flow cylindrical model test system includes a loading structure, a multiphase flow displacement model bucket, a data acquisition and analysis system, a flexible seepage model bucket and a dynamic control system. A multi-parameter test method in the displacement process of pollutants in three-dimensional multi-field and multiphase media is reasonably configured based on the sequential and superimposed application requirements of heat and steam in the thermal enhanced soil vapor extraction process.

Abstract: The disclosure relates to a multi-probe NMR rock soil in-situ monitoring method, which includes: placing a multi-probe component to a target layer in a soil drill hole, where the multi-probe component includes NMR probes respectively located at the soils at different depths and having different measurement frequencies; performing in-situ NMR measurement on soils at different depths at the same time; by using a spectrometer component, receiving measurement signals from all NMR probes and performing frequency mapping analysis to distinguish NMR raw measurement data collected by each NMR probe; by using the spectrometer component, transmitting the raw measurement data to an industrial control computer to perform an inversion processing on the measurement data of the NMR probes and obtain T2 distribution mapping of the soils at different positions; based on the T2 distribution mapping, obtaining a water ratio of soil, a soil-water characteristics curve, soil non-homogeneity information and oil pollutant informati

Abstract: An automatic microseismic monitoring-intelligent rockburst early warning integrated system for TBM-based construction includes a partition plate, a guide rail, a sensor festoon bracket, a trolley festoon bracket, and a trolley. The trolley is provided with a drive wheel adapted and connected to the guide rail. The sensor festoon bracket is provided with a microseismic sensor festoon, and the trolley festoon bracket is provided with a trolley festoon. The trolley is provided with a collaborative robot for clamping a removable anchoring device, and a collaborative robot control cabinet connected thereto. An automatic microseismic monitoring-intelligent rockburst early warning integrated method is further provided.

Abstract: A method for processing fused “underground+ground” data in deep formation exploration includes: collecting underground multi-source data by an underground intelligent probing rod, preprocessing the multi-source data to obtain an original digital signal, storing the original digital signal in an underground memory, obtaining continuous depth data by a ground device; performing high-bitrate and low-bitrate compression on the original digital signal, and modulating compressed signals; driving modulated signals by power, so the modulated signal is transmitted in a drilling stem with cable in a form of a power line carrier and then output, or first transmitted in a first section of the drilling stem with cable, re-collected in a short drill pipe with repeater, re-emitted to a second section of the drilling stem with cable, and then output; when a transmission line is disconnected, synchronizing and fusing data; and finally using fused data and the data output by the transmission line as final output data.

Abstract: A method for aligning a laser point cloud and an image based on deep learning includes: collecting data by using a laser ladar and a camera, to obtain laser point cloud data and a two-dimensional (2D) image respectively; dividing preprocessed point cloud data into triangular meshes to obtain a three-dimensional (3D) mesh model of the point cloud data; determining a relative location relationship between a laser radar and the multi-function camera, and constructing a virtual camera in the 3D mesh model to capture a simulated 2D image at a same location and angle as those of the camera; and aligning, by using a convolution neural network (CNN), the 2D image captured by the camera and the simulated 2D image captured by the virtual camera to generate aligned images that map onto each other.

Abstract: A device and method for health diagnosis of subgrade service performance, including: a loading device, which applies a load to a road; a data acquisition device, which collects stress and vertical displacement generated by a pavement layer when a load is applied; a data analysis device, that performs a frequency spectrum analysis on a vertical displacement signal to obtain a propagation speed of a Rayleigh wave of a pavement layer and a thickness of the pavement layer, and thereby obtains an elastic modulus of the pavement layer; inputting the stress, vertical displacement, elastic modulus and thickness of pavement layer into a trained subgrade soil modulus calculation model to obtain an elastic modulus of subgrade soil; and obtaining a dynamic deformation value of the subgrade under a standard load, and evaluating a health state of the subgrade according to the dynamic deformation value.

Abstract: A method for mapping a three-dimensional (3D) point cloud model based on deep learning includes: extracting features of image data by using a convolutional neural network; extracting features of point cloud data by using a PointNet point cloud processing network, and constructing a 3D model of the point cloud data by using a triangular mesh; aligning the 3D model and an image spatially and temporally; performing projection mapping on the aligned 3D model and image, and superimposing location information in the point cloud data onto texture information of the image to obtain a first fused image; fusing the features of the point cloud data and the features of the image data to obtain a second fused image with a fused feature; and superimposing the first fused image onto the second fused image, and obtaining a superimposition weight by using the convolutional neural network, to generate a mapped 3D model.

Abstract: A method for three-dimensional (3D) imaging of an underground goaf includes: obtaining a video image and point cloud data of an underground goaf; determining a posture transformation matrix, and aligning the video image and the point cloud data; identifying a material texture based on the video image to obtain material texture information; dividing the point cloud data into triangular meshes to form an initial 3D model of the underground goaf; mapping the material texture information onto the 3D model to form a target 3D model with a material texture attribute; calculating a bidirectional reflectance distribution function (BRDF) of the target 3D model based on the material texture attribute; simulating global illumination, and constructing a rendering equation; and making a setting to emit ray from a viewpoint, and performing ray tracing based on the rendering equation to obtain a high-brightness real scene image of the underground goaf.

Abstract: An internal peeping detection-while-drilling system includes an intelligent probing rod, cable drill pipes, a signal relay sub, a ground control terminal, a data interpretation and goaf reconstruction imaging software system, and a remote data transmission system, where the intelligent probing rod includes an up-down separated protective transmission mechanism and an instrument cabin; the intelligent probing rod includes a lower end connected to a drilling bit, and an upper end connected to each of the cable drill pipes; the instrument cabin is provided in the up-down separated protective transmission mechanism, and provided with a sonar-lidar-audio/video sensor assembly; the cable drill pipes are connected to each other to form a cable and data transmission channel; the signal relay sub is provided between the cable drill pipes at intervals; and an uppermost end of the cable drill pipe is connected to the ground control terminal.

Abstract: The present invention provides a testing device and method for interface mechanical parameters of natural gas hydrated soil. The interface mechanical parameter testing device for natural gas hydrated soil includes a reaction kettle, a rotating power mechanism, a sample loading mechanism, a pressure mechanism, an atmosphere regulating mechanism, and a temperature regulating mechanism. The testing method for interface mechanical parameters of hydrated soil containing natural gas is implemented based on this device. It can improve the accuracy and reliability of mechanical parameters at the interface of hydrated soil containing natural gas.

Abstract: A flexible gastight material for a landfill site includes a component A and a component B, the component A including: at least one of polypropylene glycol with a molecular weight of 600-4000, polytetrahydrofuran diol with a molecular weight of 1000-3000, polycaprolactone diol with a molecular weight of 1000-3000, and polycarbonate diol with a molecular weight of 1000-3000; and at least one of 2,4?-diphenylmethane diisocyanate, 4,4?-diphenylmethane diisocyanate, toluene diisocyanate, isophorone diisocyanate, and hexamethylene diisocyanate. The flexible gastight material for the landfill site provided in the present application has a micro-closed-cell foam structure. The closed-cell elastic structure of the flexible gastight material may block the volatilization of toxic and harmful odors, and may cut off the diffusion path of the odors by combining with gas treatment systems at the landfill site. The flexible gastight material has excellent water blocking and gas sealing performance.

Abstract: Disclosed is a method for designing parameters of an advance stress relief hole in a rockburst source zone of a construction tunnel in deep-seated hard rocks, including S1: classifying rockbursts in the TBM tunnel in the deep-seated hard rocks; S2: identifying a potential rockburst source zone of the TBM tunnel in the deep-seated hard rocks; S3: developing a scheme design and effect evaluation method for the parameters of the advance stress relief hole; S4: performing analysis to find a pattern in the parameters of the advance stress relief hole and optimizing the design; and S5: determining an optimal scheme for arranging the stress relief hole in accord with engineering practice.

Abstract: The present application discloses an intelligent frequency reading method applicable to a low-temperature environment and a wireless vibrating wire acquisition instrument.

Abstract: The disclosure provides a vibrating wire compressive stress gauge and stress testing equipment suitable for use in low-temperature environments. By providing a stress trigger sleeve made of elastic material, the concrete structure of the lining itself expands when it is affected by high or low temperatures, extruding the stress trigger sleeve, and the extrusion force is offset through the elastic force of the elastic material, thereby preventing the expansion force from being transmitted to the vibrating wire assembly to generate stress signals that are caused by the self-expansion of the lining structure, which may cause measurement error. Specifically, the vibrating wire assembly is provided in the vibrating wire measurement space composed of a stress trigger sleeve and a pair of anchoring disks. When the lining is subjected to external stress, a certain internal force will be generated.

Abstract: A salt cavern flow battery system includes: stack; salt cavern, including n positive salt caverns for storing a positive electrolyte with different valence states separately, and m negative salt caverns for storing a negative electrolyte with different valence states separately; a first closed loop being formed by connecting the positive electrode of the stack and the n positive salt caverns in series through a pipeline; a second closed loop being formed by connecting the negative electrode of the stack and the m negative salt caverns in series through a pipeline; a first pusher being arranged in the first closed loop to push the positive electrolyte to flow cyclically in the first closed loop, a second pusher being arranged in the second closed loop to push the negative electrolyte to flow cyclically in the second closed loop.

Abstract: A device and method for health diagnosis of subgrade service performance, including: a loading device, which applies a load to a road; a data acquisition device, which collects stress and vertical displacement generated by a pavement layer when a load is applied; a data analysis device, that performs a frequency spectrum analysis on a vertical displacement signal to obtain a propagation speed of a Rayleigh wave of a pavement layer and a thickness of the pavement layer, and thereby obtains an elastic modulus of the pavement layer; inputting the stress, vertical displacement, elastic modulus and thickness of pavement layer into a trained subgrade soil modulus calculation model to obtain an elastic modulus of subgrade soil; and obtaining a dynamic deformation value of the subgrade under a standard load, and evaluating a health state of the subgrade according to the dynamic deformation value.

Abstract: Disclosed are a barium slag-modified aluminate quick-hardening special cementing material and a preparation method thereof, wherein the raw materials for the preparation of the barium slag-modified aluminate quick-hardening special cementing material includes, in parts by weight: 10-12 parts of aluminate cement clinker, 2-3 parts of barium slag powder, 1.5-2 parts of sulfate material, and 0-1.5 parts of early-setting agent. The present invention, on the basis of ensuring the original advantages of aluminate cement, can increase the long-term strength, durability, and economy, and solve the possible environmental problems caused by the barium slag, making it more suitable for use in various engineering projects.