73 results about "Piezometer" patented technology

The invention provides an in-tunnel inrush water pressure monitoring method and system based on dual-acquisition multi-modal data, and belongs to the technical field of inrush water pressure monitoring. Comprising the steps of collecting video data by adopting a high-definition camera; sequentially performing water flow area intelligent segmentation, optical flow calculation and ConvLSTM time sequence prediction on the video data to predict the water flow velocity; an infrared camera is adopted to collect temperature data; self-adaptive temperature gradient calculation and temperature anomaly detection are sequentially carried out on the temperature data to predict the water flow temperature; aligning and fusing the predicted data of the water flow velocity and the water flow temperature, and constructing a water pressure calculation model to obtain a water pressure predicted value; and determining an early warning level according to the water pressure predicted value so as to adjust the monitoring mode of the inrush water pressure in the tunnel. According to the method, the infrared technology and the vision field technology are combined, accurate prediction of the inrush water pressure in the tunnel can be achieved, and a corresponding early warning monitoring mode is provided according to the prediction result.

The invention provides a mine water prevention and control risk early warning method and system based on earthquake and geology fusion, and belongs to the field of soil layer or rock drilling, the method comprises the steps that real-time earthquake data of an earthquake monitoring module and geological exploration data of a geological exploration module are received, and the geological exploration module comprises a drilling detection module and a hydrogeological analysis module; based on the real-time seismic data, the geological exploration data and a preset water prevention and control risk early warning model, obtaining a risk level including a risk level and a corresponding water prevention and control execution measure; triggering target execution equipment such as drilling equipment to perform prevention and treatment according to execution measures; drilling a monitoring hole and arranging an optical fiber osmometer to collect osmotic pressure data at a first risk grade; at the second risk level, grouting plugging is conducted on the crack drilling grouting holes; constructing a water guide hole in the aquifer at the third risk level, and guiding underground water to a safe area through a drainage pump group. According to the method, multi-source data are fused to realize graded accurate early warning and prevention.

The invention relates to a test device and method for simulating migration and transformation of nitrogen in underground water of a river bank subsurface zone, and the device comprises a detachable organic glass tank, the internal space of which is divided into a left-end water tank, a middle sand tank and a right-end water tank from left to right in sequence, and the left-end water tank, the middle sand tank and the right-end water tank are respectively used for simulating a river channel, a river bank and a far-bank aquifer; the water level control assembly comprises two constant water head control modules and platform lifting modules corresponding to the two constant water head control modules; the pore water level monitoring assembly comprises a plurality of piezometric tubes, a plurality of transparent graduated scales and a photographing module; the water quality sampling assembly comprises a pore water filtering module embedded in the middle sand tank in an array manner, a vacuum pumping module and a water sample collecting module connected with the pore water filtering module and the vacuum pumping module. Compared with the prior art, the sampling time of the pore water of the fine-particle soil is greatly shortened, and the accuracy of a test result is ensured; automatic control, whole-process monitoring and rapid and automatic sampling of water level fluctuation in the water tank are realized.

The utility model provides a small reservoir piezometric tube orifice osmometer telescopic suspension and protection device, which comprises a support base, a lifting plate, a pressure measuring pillar and a data cable, the support base is disc-shaped, the pressure measuring pillar is arranged below the support base, and the pressure measuring pillar can move up and down. According to the scheme, through the combined design of the cable protection cylinder, the mounting plate and the rubber gasket, a stable channel and protection are provided for the data cable, water or other impurities are prevented from permeating into the device through gaps to damage electronic equipment, subsequent maintenance or replacement of the data cable is facilitated, and meanwhile, through the supporting protection insertion plate, the data cable can be conveniently and rapidly protected. The overall structural strength of the device is enhanced, an additional protective layer is provided, damage caused by accidental collision in the carrying, mounting or dismounting process is effectively prevented, and the service life of the device is prolonged.

The invention provides a reservoir basin geomembrane and concrete toe board composite anti-seepage connecting structure and a safety monitoring method. The reservoir basin geomembrane and concrete toe board composite anti-seepage connecting structure comprises a concrete toe board, a GM-GCL composite anti-seepage connecting structure, a reservoir basin geomembrane and a special rolling area. Osmometers are arranged between the corrugated geomembrane and the GCL and below the GCL, and a safety monitoring meter is arranged at the position where the geomembrane is horizontally laid. The corrugated GM-GCL composite anti-seepage connecting structure is formed by the geomembrane and the GCL geosynthetic clay liner which are arranged in a corrugated mode, self-adaptive deformation is generated under the action of overlying water pressure by means of the telescopic characteristic of the corrugated GM-GCL composite anti-seepage connecting structure, and therefore the differential settlement difference between a concrete toe board and a reservoir basin foundation is coordinated, and the anti-seepage effect is achieved. Meanwhile, a special rolling area is arranged to improve the supporting capacity of the silty-fine sand filler and the transition layer below the composite anti-seepage connection structure, the problem that local connection of the anti-seepage geomembrane is damaged due to deformation discordance is effectively solved, and a leakage and deformation monitoring method of the corrugated GM-GCL composite anti-seepage connection structure is established; technical support is provided for concrete toe board and geomembrane anti-seepage connection design and a safety monitoring method in pumped storage power station reservoir engineering.

This invention relates to the field of reservoir dam safety monitoring technology, specifically to a seepage monitoring system and method for reservoir safety monitoring, comprising: a distributed seepage pressure monitoring array, in which multiple high-precision vibrating wire piezometers are arranged on each monitoring cross section of the reservoir dam body to form a three-dimensional monitoring grid, wherein the piezometers are protected by a novel nanofiber filter layer. This invention solves the problems of traditional single-point piezometers being unable to reflect the overall seepage field and being prone to siltation by using the three-dimensional monitoring grid of the distributed seepage pressure monitoring array and the novel nanofiber filter layer. Combined with the double-weir structure of the intelligent water measuring weir group and the ultrasonic silt detection module, it avoids the accuracy deviation caused by siltation in traditional water measuring weirs. Edge computing nodes establish a three-dimensional correlation model of seepage pressure and flow rate with time using an embedded multi-parameter coupling analysis algorithm, which can automatically identify abnormal seepage patterns, solving the problem that traditional monitoring data is isolated and cannot automatically identify potential dam hazards.

The invention discloses a coal mine shaft lining permeability water pressure test device, belonging to the field of permeability water pressure test devices. It includes a cylinder for installing a piezometer, a front end cover of the cylinder is provided with an opening and closing water retaining assembly, a rear end cover of the cylinder is slidably provided with an adjustment assembly for driving the cylinder to slide forward and backward, a sliding support assembly is also provided between the adjustment assembly and the cylinder, and the sliding support assembly includes a sleeve fixedly sleeved on the middle part of the piezometer body, an expansion ring located at the outer edges of both sides of the sleeve and interconnected, a spiral air pipe sleeved on the piezometer and connected to the expansion ring, and an adjustment air bag assembly for providing air pressure to the spiral air pipe, the spiral air pipe is extended under the drive of air pressure to push the piezometer to slide, and the expansion ring is expanded to achieve stable support for the positioned piezometer. The device of the invention can not only install and stably support the piezometer, but also adjust the position of the piezometer in the borehole to a suitable measuring position.

The application discloses a dam foundation pressure measuring pipe construction method, and belongs to the technical field of dam foundation seepage monitoring. The steps include the following: firstly, construction parameters are determined through survey and design, and the hole is cleaned after drilling construction; a pressure measuring pipe containing a double-layer filter layer is processed and assembled, the first filter material is backfilled to serve as support before the pipe is lowered into the hole, and the second filter material is backfilled in layers to form a filter layer in the gap outside the pipe; a special filler is used to backfill bentonite balls in grains to form a first flexible sealing layer, cement bentonite slurry is poured on the upper side to form a second rigid anti-seepage layer, and a double anti-seepage system is constructed; after passing the sensitivity test, the concrete base is poured, and the protection box is installed. The method solves the problems of easy failure of traditional process sealing and uneven backfilling, improves the construction quality and the reliability of monitoring data, and is suitable for complex dam foundation geological conditions.

The utility model relates to the field of magnetostrictive piezometric tubes, and particularly discloses a magnetostrictive piezometric tube water level measuring device which comprises a measuring device, the measuring device comprises a liquid level meter and a waveguide wire, a positioning mechanism is arranged below the liquid level meter and comprises two positioning chucks, a locking screw is installed on the side surface of the left positioning chuck, and a locking nut is installed on the side surface of the right positioning chuck. And a penetrating hole is formed in the position, corresponding to the locking screw, in the positioning chuck located on the right side, limiting sliding grooves are formed in the lower surfaces of the two positioning chucks, limiting clamping plates are installed in the limiting sliding grooves, and springs are installed at the positions, located in the limiting sliding grooves, of one sides of the limiting clamping plates. The two positioning chucks are integrally in butt joint at the tank opening position of a detection position, and the two limiting clamping plates are clamped on the outer side of a pipeline under the reset acting force of the spring, so that it can be guaranteed that a measuring device installed in the positioning mechanism is installed at the center position, and it can be guaranteed that a waveguide wire is straightened under the action of a guide cable balancing weight below the positioning mechanism.

The present invention belongs to the field of lining water pressure measurement, and provides a monitoring device and method for measuring the external water pressure of a deep-buried tunnel lining. The device includes a drill hole and a piezometer. The drill hole is drilled horizontally in the middle of the side wall of the deep-buried tunnel and extends beyond the weakly disturbed area of groundwater. The piezometers are buried along the inner part of the drill hole, and the outside of each piezometer is wrapped and compacted with medium-coarse sand. By inputting the piezometer data at different positions of the deep-buried tunnel into the far-field water head models corresponding to different positions and calculating them respectively, the present invention realizes the distributed monitoring of groundwater at different positions of the deep-buried tunnel, solves the problem of incomplete monitoring of the spatio-temporal law of groundwater affected by tunnel excavation, is beneficial to providing a scientific basis for the design and calculation of the lining structure of the deep-buried tunnel, and provides an important guarantee for the long-term safe operation of the engineering structure of the deep-buried tunnel.

The invention relates to the field of tunnel surrounding rock construction equipment, and discloses a tunnel surrounding rock crack water pressure measuring device which comprises a valve, and the left end and the right end of the valve are provided with a second communicating pipe and a first communicating pipe respectively through flanges; a third communicating pipe is fixedly connected between the right end of the fourth communicating pipe and the left end of the second communicating pipe, a first spring and a connecting column are arranged in the fourth communicating pipe in a sealed and sleeved mode, a piston is fixedly connected to the end, located in an inner cavity of the third communicating pipe, of the connecting column, and a fixing column is fixedly connected to the left side of the inner wall of the third communicating pipe. The device can ensure that water can completely enter the inner cavities of the third communicating pipe and the fourth communicating pipe, at the moment, the connecting column is fixed through the magnetic attraction force of the magnetic component on the connecting column, then the water pressure acts on the interior of the water pressure gauge through hydraulic oil, and the water pressure measuring process is completed. The design effectively buffers the destructiveness of the'water hammer effect 'of the water flow on the water pressure gauge and the device.

This invention provides a float-type piezometer water level monitoring device, including a piezometer tube, a retractable scale, a float, and a scale fixing sleeve. The device is buried inside the dam. Water enters the piezometer tube through the through-hole, and the water level raises the float. Under the action of the float, the retractable scale extends and retracts to be positioned at its real-time scale length. The piezometer tube is made of galvanized steel or rigid plastic. The real-time scale length is read directly. The real-time water level inside the piezometer tube is obtained by subtracting the real-time scale length from the elevation of the piezometer tube opening. This allows for determination of whether the dam's seepage pressure is within the allowable range. This device simplifies the observation process, is easy to use, eliminates the need to bring specialized instruments to the site, and has low device and maintenance costs.

The present invention provides a device and method for testing water and soil pressure in a submarine shield tunnel under tidal action. The device comprises: a C-shaped workbench; a sealing mechanism located at the bottom of the C-shaped opening, comprising a silo structure and a top cover plate, with a sealing gasket provided between the top cover plate and the silo structure; soil provided within the silo structure, with a water inlet and a groove provided on the top cover plate; a simulated tunnel structure located within the silo structure; a top loading mechanism located at the top of the C-shaped opening; a hydraulic loading mechanism for providing a simulated tidal load; a pore water pressure measuring mechanism for measuring the pore water pressure of soil layers at different heights within the soil; a water pressure gauge for measuring the water pressure load around the simulated tunnel structure, and an earth pressure gauge for measuring the earth pressure load around the simulated tunnel structure; and a control device. The present invention can simulate the influence of tidal action on water and soil pressure in a submarine shield tunnel, as well as the depth to which tidal action affects pore water pressure in the overlying stratum.

The application discloses a kind of to utilize existing power supply piezometer power supply and extraction separation potential measurement system, comprising: existing power supply piezometer, electrode system and potential acquisition control subsystem;Existing power supply piezometer is used to inject stable current field in the dam body to be measured;Electrode system includes: power supply electrode system, measurement electrode system and public electrode system;Power supply electrode system is used to connect existing power supply piezometer, forms stable current field;Measurement electrode system is used to measure the stable current field formed by any existing power supply piezometer and power supply electrode system;Public electrode system is used to connect with measurement electrode system, constitutes potential measurement loop;Potential acquisition control subsystem is internally provided with power supply and extraction separation potential collector, for emitting current and back extraction potential data body, and determine the spatial distribution of leakage hidden danger in the dam to be measured.The system can effectively reduce the influence of piezometer metal material on the propagation of electric field inside dam, so as to improve the precision of reservoir dam leakage hidden danger diagnosis in complex site.

The invention relates to an in-hole upward hole osmometer embedding device and method. The device comprises a double-layer floral tube sleeve, a fixed water stop capsule, a detachable connector and a detachable conveying rod which are sequentially connected in series. An inner sleeve of the double-layer floral tube sleeve contains an osmometer and is filled with fine sand; gravels are filled between the inner sleeve and the outer sleeve to form an inverted filter structure; the fixed water stop capsule comprises an inflatable capsule, a restoring spring and a framework barrel, and the inflatable capsule can extrude and expand to be attached to the hole wall or reset to be separated from the hole wall; the detachable connector is connected with the framework barrel through threads, and the square rotating head and the *-shaped protrusion of the conveying rod are embedded to achieve synchronous rotation; the conveying rod can be connected with the extension rod to be matched with the deep hole. The method comprises the steps of assembling the device, connecting the conveying rod, pushing to the depth, rotating and fixing the water stop capsule, and disassembling the conveying rod. According to the invention, stable placement of the upward hole osmometer, anti-clogging protection equipment of the inverted filter structure and detachable design are realized, maintenance and reuse are supported, deep hole and short-term / long-term monitoring requirements are met, and a reliable technical means is provided for osmotic pressure monitoring of underground engineering.

The utility model relates to the technical field of osmotic pressure monitoring, in particular to an osmotic pressure monitoring device. The embodiment of the utility model provides an osmotic pressure monitoring device. The osmotic pressure monitoring device comprises a protection tube, a protection unit and an osmometer, the protection pipe is provided with a protection cavity and a first water inlet hole communicated with the protection cavity, the protection unit is installed in the protection cavity, the protection unit comprises a driving assembly and a protection cover which are connected, and the protection cover is provided with a plurality of second water inlet holes communicated with the protection cavity; the osmometer is installed in the protection cavity and provided with a pressure measuring hole, and the pressure measuring hole is located in the protection cover. Under the condition that water enters the first water inlet holes, the driving assembly can drive the protective cover to extend out of the protective pipe under the action of water pressure, so that the multiple second water inlet holes are exposed out of the protective pipe. According to the osmotic pressure monitoring device provided by the invention, when the osmotic pressure monitoring device is lowered from the earth surface to the deep underground water, under the isolation of the protection pipe, shallow sand and mud can be effectively prevented from entering the protection cover to influence the detection of the osmometer.

The present application provides a mine water prevention and control risk warning method and system based on the integration of earthquakes and geology, belonging to the field of soil or rock drilling. The method includes: receiving real-time earthquake data from an earthquake monitoring module and geological exploration data from a geological exploration module, the geological exploration module including a borehole detection module and a hydrogeological analysis module; based on real-time earthquake data, geological exploration data and a preset water prevention and control risk warning model, obtaining a risk level including risk levels and corresponding water prevention and control execution measures; triggering target execution equipment such as drilling equipment to perform prevention and control according to the execution measures: at the first risk level, a monitoring hole is drilled and an optical fiber piezometer is installed to collect seepage pressure data; at the second risk level, a grouting hole is drilled to grout and seal the fissure; at the third risk level, a water diversion hole is constructed in the aquifer to guide groundwater to a safe area through a drainage pump group. This method integrates multi-source data to achieve graded and precise warning and prevention.

The utility model relates to a seepage monitoring system adopting a big data algorithm. The seepage monitoring system comprises a seepage monitoring internet-of-things device, an auxiliary assembly and a background management subsystem, the seepage monitoring internet-of-things device calculates dam single width seepage flow, dam foundation single width seepage flow and dam comprehensive seepage flow of each section according to the collected osmometer data and water level meter data by adopting a big data algorithm; the seepage monitoring internet-of-things device sends data to the background management subsystem in an internet-of-things mode, and the background management subsystem stores, calculates, displays, alarms, sets and the like the data. According to the utility model, the seepage condition of the dam in the water conservancy project can be monitored in all directions, the seepage distribution condition in the dam is calculated, and the seepage trend is analyzed; the device has fewer components, is convenient to mount, has small influence on the dam in the mounting process, and is easy to apply and implement practically.

The invention relates to an osmotic pressure monitoring device for an underground reservoir coal pillar dam body, the osmotic pressure monitoring device comprises an osmotic pressure monitoring structure, the osmotic pressure monitoring structure comprises a filter assembly, a water pipe and an osmometer which are used for being installed in the coal pillar dam body, and the water pipe is located between the filter assembly and the osmometer. The water conveying pipe is provided with a water conveying channel communicated with the filtering assembly and the osmometer, the filtering assembly comprises a water seepage end cover and a filter element located between the water seepage end cover and the water conveying pipe, a water seepage channel is formed in the water seepage end cover, and the through-flow area of the water seepage channel is gradually increased in the direction from an inlet of the water seepage channel to an outlet of the water seepage channel. The opening of the side, making contact with the soil of the coal pillar dam body, of the water seepage channel is small, and the situation that impurities enter the water seepage channel and easily block the water seepage channel is effectively avoided. Besides, the filter element can also play a role in filtering, so that the situation that impurities in the coal pillar dam body flow into the osmometer to influence the monitoring result of the osmometer and even damage the osmometer is effectively avoided.

The invention provides a diving initial water level measuring device and method for a rock hole wall, the diving initial water level measuring device comprises a measuring sleeve and a water pressure gauge, the outer wall of the measuring sleeve is connected with a sealing ring group, the water pressure gauge is located above the sealing ring group, and the sealing ring group comprises a first sealing ring and a second sealing ring which sleeve the outer wall of the measuring sleeve in the axial direction; an air inlet channel and an air outlet channel which extend in the axial direction are formed in the pipe wall of the measuring sleeve, and a first air hole and a second air hole are formed in the measuring sleeve. The outer wall of the measuring sleeve is connected with the sealing ring group, so that a semi-dry and semi-wet drilling mode is realized, a clear water slag carrying function is reserved, identification difficulty caused by full-hole mixing is avoided, and the initial diving water level is distinguished while drilling under the condition of clear water drilling. By means of the air inlet channel and the air outlet channel in the pipe wall of the measuring sleeve, dynamic balance of the sealing effect of the sealing ring set is maintained, and the measuring accuracy of the water column pressure formed after diving infiltration is improved.

The invention provides an intelligent monitoring method and system for the motion posture of an underwater vehicle based on an MEMS, and relates to the technical field of measurement, and the method comprises the steps: collecting a multi-dimensional MEMS signal; strapdown integration is carried out through the angular velocity of the gyroscope, the acceleration of the accelerometer and the state of the last sequence of time; taking the magnetic field intensity of a magnetometer and a water depth signal of a piezometer as environment disturbance signals, and performing neural residual analysis according to a historical observation window signal, the environment disturbance signals and a preprocessing result; correcting the first prediction state; performing multi-channel quality index calculation on the multi-dimensional MEMS signal, and inputting the confidence coefficient vector, the second prediction state and the observation model into a calculation gain matrix; and performing weighted fusion of the first prediction state and the second prediction state according to the gain matrix, and outputting a motion attitude monitoring result. According to the invention, the technical problem of low attitude monitoring precision of the underwater vehicle in the prior art can be solved, and the technical effect of improving the attitude monitoring precision is achieved.

The invention provides a side slope state monitoring method and system for monitoring a side slope, relates to monitoring of the side slope state and / or early detection of side slope instability, and is used for taking prevention measures of side slope instability in time. The method comprises the following steps: acquiring volumetric water content from a plurality of sensors arranged on a slope; determining a safety factor of the slope using the volumetric water content based on a linear regression model obtained from the simulated volumetric water content corresponding to the humid meteorological conditions; and generating an alert in response to the safety factor being below a safety threshold, the alert indicating that a slope instability may occur. The system includes a controller arranged to perform the method and a sensor arranged on a selected slope and arranged to provide volumetric water content. The sensors can comprise osmometers arranged at the slope top and the slope toe of the selected slope and capacitive moisture sensors distributed at different elevations of the selected slope. According to the invention, a slope evaluation solution with relatively high cost effectiveness can be provided.

The invention discloses an integrated visual constant head permeameter device, and relates to the technical field of constant head permeameters. Comprising a base, a supporting frame is fixedly installed on the base, a water supply barrel is fixedly installed on the supporting frame, a drainage pipe is fixedly communicated with the water supply barrel, and a permeation barrel is fixedly installed on the base and located on one side of the supporting frame; an auxiliary assembly is arranged on the outer side of the permeation cylinder, a sample is uniformly located in the permeation cylinder through the auxiliary assembly, the side end face of the permeation cylinder is fixedly communicated with three pressure measuring pipes at different positions, and a dial gauge is fixedly installed on the upper end face of the base; a measuring cylinder is fixedly mounted on the base and located on one side of the permeation cylinder, and the side end face of the permeation cylinder is fixedly communicated with a through pipe. Through mutual cooperation of all structures in the auxiliary assembly, the compaction effect of a sample in the permeation cylinder is improved, the precision and stability of an experiment are enhanced, and the use effect of the whole device is effectively improved.

The utility model relates to the technical field of airflow detection, and discloses a device for detecting airflow pressure, which comprises a fan body, the outer wall of the fan body is provided with a metal air duct, the outer wall of the metal air duct is fixedly connected with a support, the outer wall of the support is provided with a manometer, the outer wall of the metal air duct is provided with an annular pressure measuring pipe body, and the annular pressure measuring pipe body is fixedly connected with the metal air duct. A first piezometer tube is arranged on the outer wall of the annular piezometer tube body, a hose is arranged at one end of the first piezometer tube, one end of the hose is fixedly connected to the outer wall of the manometer, and the other end of the hose is fixedly connected to the outer wall of the first piezometer tube. According to the utility model, the annular pressure measuring pipe is arranged on the outer wall of the metal air duct, so that the average pressure value of the cross section can be detected, the detection is more stable and more accurate, and the effect of the device can be more effectively played by measuring the pressure values of two different cross sections and calculating flow information.

The present invention discloses an automated monitoring system and method for the vertical displacement of an underwater mud surface. The monitoring system comprises an automated monitoring system for a water surface elevation laser rangefinder and an automated monitoring system for an underwater mud surface depth water pressure gauge. The automated monitoring system for the water surface elevation laser rangefinder and the automated monitoring system for the underwater mud surface depth water pressure gauge establish an elevation connection using the water surface as a dividing line. The monitoring method includes using a remote terminal to set the total observation time and observation time interval for the laser rangefinder data acquisition box and the water pressure gauge data acquisition box; and employing a leveling method to measure and obtain elevation data at each time point at the top of the water level pipe. The present invention utilizes the two monitoring systems to establish an elevation connection, obtain real-time vertical displacement changes, and provide monitoring data for risk assessment of underwater shield construction, thereby avoiding construction risks, ensuring safe and efficient construction operations, reducing construction costs, and improving economic benefits.

The application discloses a reservoir seepage pressure data intelligent analysis and early warning method, extracts the seepage pressure value corresponding to each water level value at each moment from the preliminary screening database; combines the seepage pressure measuring point pipe mouth and the sensor installation elevation data to preliminarily judge and eliminate logical error data; uses the 3Sigma principle to eliminate abnormal seepage pressure data under each water level; adopts feature engineering and Z-score method to generate features and normalize them; maps the relationship between the reservoir water level and the piezometer water level through support vector regression fitting, calculates the model residual and generates the early warning range; finally, compares and analyzes the seepage pressure data and the early warning range, and starts the corresponding early warning mechanism according to the difference result. Based on the characteristics of the reservoir dam seepage pressure monitoring data, the machine learning technology and various statistical techniques are integrated, the accuracy and reliability of data analysis are significantly improved, and the application is especially suitable for the field of reservoir dam seepage pressure data analysis and early warning which needs high precision.

The utility model provides a dam uplift pressure monitoring device which comprises a pipe orifice device and a pressure measuring pipe which are connected up and down, and the pipe orifice device is composed of an upper half part and a lower half part which are communicated up and down; the upper half part is composed of a vertical pipe and a transverse pipe, the upper end of the vertical pipe is provided with a liquid level pipe connector and an osmometer cable outlet, an osmometer is arranged in the vertical pipe, the inner end of the transverse pipe is communicated with the side face of the vertical pipe, the outer end of the transverse pipe is a pressure meter connector, the lower half part is in threaded connection with the upper end of the pressure measuring pipe, the connecting position is wrapped with a raw material belt, and connector water stop sealing is conducted; the liquid level pipe connector is connected with the lower end of the liquid level pipe, a cable of the osmometer is led out of the osmometer cable outlet, and the pressure meter connector is provided with a pressure meter. The dam uplift pressure detection device has the beneficial effects that the structure is ingenious, the dam uplift pressure can be monitored, and the detection device can be calibrated, so that the accuracy of actual monitoring is effectively improved.

The present invention discloses a simulation method for the vertical leakage and damage process of water and sand in a ground-connected wall supporting foundation pit, comprising the following steps: embedding a defective card plate into a transparent outlet pipe, loading sand samples in layers in a transparent experimental box and compacting them in layers, installing a piezometer, and calculating the critical head difference of each layer of sand sample after the sand sample is saturated and consolidated; starting a simulation experiment, obtaining experimental data of the piezometer and the water and sand leakage quality, and determining the leakage and damage state of each layer of sand sample; calculating the additional unbearable head difference and the measured leakage and damage thickness of the critical layer sand sample, and then obtaining the time-varying data of the total leakage height of the sand layer during the simulation process; and using a visualization tool to establish a time-varying graph of pore water pressure, water and sand leakage quality, and the total leakage height of the sand layer. The simulation method established by the present invention can realize the simulation and data visualization of the leakage process, is helpful to explore the law and time of vertical leakage and damage of water and sand, can reflect the complexity of actual leakage, and is conducive to the development of research and teaching experiments.

The present invention discloses a single-chamber high-pressure pre-bored pressuremeter capable of simultaneously measuring water level and seepage, which comprises a test box device and a probe device. The probe device is connected to the test box device. The probe device includes a probe body, on which a water pressure gauge group and a probe top device are installed. The probe top device includes a probe top block and a guide cone. The probe top block is connected to the top of the probe body, and the guide cone is connected to the probe top block. The probe top block is provided with a top connector and a top adapter. The top connector is located at the end of the probe top block, and the top adapter is located on the circumferential surface of the probe top block. The water pressure gauge group includes a water pressure gauge in the probe cavity and a water pressure gauge in the measuring hole. The test box device includes a test box body, a test box cover and a reading instrument. The water pressure gauge in the probe cavity and the water pressure gauge in the measuring hole are respectively electrically connected to the reading instrument, and the data measured by the water pressure gauge in the probe cavity and the water pressure gauge in the measuring hole are displayed through the reading instrument.

The invention discloses a deepwater spiral soil sampling dredging ship and a dredging method, and the dredging ship comprises a ship body, the middle part of which is provided with a vertically through central hole; a lifting device is arranged on the ship body; the desilting device comprises a sludge conveying barrel and a drainage cover which is fixedly arranged at the bottom of the sludge conveying barrel and communicated with the sludge conveying barrel, the sludge conveying barrel extends out of the center hole from bottom to top and is connected with a lifting device, and the lifting device drives the desilting device to move up and down; a first air vent is formed in the top of the sludge conveying barrel and is connected with an air supply device through a pipeline; a dredging mechanism is arranged in the drainage cover, a mud conveying mechanism is arranged in the mud conveying barrel, a mud outlet mechanism is arranged at the mud outlet end, corresponding to the mud conveying mechanism, of the mud conveying barrel, and mud dug by the dredging mechanism is conveyed upwards through the mud conveying mechanism and discharged through the mud outlet mechanism; a water pressure gauge is arranged on the outer side of the drainage cover, and a first air pressure sensor is arranged in the drainage cover. The problems that an existing desilting device is complex in aftertreatment process, large in energy consumption and large in pollution are solved.