4575 results about "Water seepage" patented technology

The invention discloses a real-time surrounding rock deformation monitoring and data acquisition method and system, which is applied to long-distance weak surrounding rock tunnel construction, and comprises the following steps: determining the dynamic change trend of underground water seepage rate and ground stress distribution gradient by adopting a time sequence analysis method; based on the trend, carrying out risk partitioning on the tunnel construction section by adopting a K-means clustering algorithm, determining a deformation sensitive area, and optimizing the spatial distribution of the monitoring points according to the deformation sensitive area; monitoring data are acquired in real time, and when the data fluctuation period exceeds a threshold value, the data acquisition frequency of the corresponding monitoring point is automatically improved; processing high-frequency acquired data by adopting a long-short-term memory network to obtain a real-time surrounding rock deformation prediction result; the prediction result and the multi-source real-time geological parameters are fused, a Bayesian updating method is adopted for processing, a quantitative surrounding rock stability evaluation result is obtained, closed-loop self-adaptive optimization of a monitoring scheme and accurate risk prediction are achieved, and the safety early warning capacity of tunnel construction and the utilization efficiency of monitoring resources are remarkably improved.

The invention discloses a dam body water seepage amount prediction method based on a multi-scale convolutional neural network and a bidirectional long-short-term memory neural network, and the method comprises the steps: 1, carrying out the data collection and preprocessing: 2, building an MS-CNN neural network, and extracting the features of spatial data in monitoring data; step 3, establishing a Bi-LSTM neural network, and extracting features of time data in the monitoring data; 4, model fusion and training: taking the output of the MS-CNN neural network and the time sequence data as the input of a Bi-LSTM neural network, and realizing the lap joint of the two neural networks to obtain a complete water seepage prediction model; training the model through processed dam body water seepage monitoring data, optimizing parameters of the model through a back propagation algorithm, and finely adjusting hyper-parameters to improve the recognition capability of the model; the method improves the accuracy and robustness of the whole prediction model, achieves the high-precision prediction of the water seepage amount of the dam body and the early warning of the abnormal water seepage amount, and provides powerful support for the safety monitoring and maintenance of the dam.

The invention discloses a landslide early warning method combined with a side slope radar visual perception technology, and the method comprises the steps: carrying out the periodic monitoring of a target side slope, and obtaining the surface abnormal deformation data and optical images of the target side slope; identifying a local cracking area and a water seepage area in the optical image of the target slope based on a deep learning method, and quantifying feature parameters of the local cracking area and the water seepage area; performing space-time fusion on the surface abnormal deformation data of the target slope and the feature data in the optical image, and constructing a slope landslide monitoring and early warning method based on the fused surface abnormal deformation data and optical image; according to the invention, visual monitoring of the synthetic aperture radar and the video monitoring equipment is combined, so that the accuracy and reliability of slope instability monitoring are comprehensively improved. The optical image is analyzed through deep learning, risk features such as local cracking and water seepage are recognized in time, space-time fusion of deformation and visual features is achieved, the sensitivity of an early warning mechanism is remarkably improved, and the false alarm rate is reduced.

The utility model relates to the technical field of sewage treatment, and discloses a multi-stage filtering type trash remover, the top end of each filter screen plate is fixedly connected with a conical filter plate, the top end of each filter screen plate is provided with a slot, each slot is internally provided with a water blocking plate, and the water blocking plate is provided with a water outlet. A collecting mechanism is arranged at the position, close to the inserting groove, of the bottom end of each filter screen plate, a drawing mechanism is arranged between the side ends of the water blocking plates, and a cleaning mechanism is arranged between the top ends of the conical filter plates. By means of the structure, the trash remover body can filter sewage normally, the water seepage effect of the filter screen plate and the conical filter plate cannot be affected, automatic cleaning of impurities can be achieved through cooperative arrangement of the drawing mechanism, the cleaning mechanism and other structures, manual cleaning is not needed, the cleaning difficulty is lowered, and the cleaning speed is increased.

The invention provides a high-speed rail tunnel safety monitoring method and system. The method comprises the following steps: carrying out normalization processing on original time series data to construct a multi-dimensional time series data set; the multi-dimensional time sequence data set is input into a pre-trained LSTM model, the structural state of the tunnel key part in a future time window is predicted, and the structural state comprises the surrounding rock deformation trend, the lining stress peak value, the water seepage risk grade and the crack severity grade; and according to the prediction result of the structure state and a preset mapping relationship between the structure state and the early warning level, triggering hierarchical early warning, and generating a corresponding tunnel maintenance strategy instruction. According to the technical scheme provided by the invention, intelligent sensing, accurate prediction and active maintenance decision making of the tunnel structure state can be realized, and the timeliness and preventability of high-speed rail tunnel safety management are improved.

The invention provides a highway tunnel decision-making maintenance system and a maintenance method thereof. The method comprises the steps of obtaining tunnel static and dynamic data and tunnel surrounding geological environment data; according to the geological environment data, carrying out geological risk analysis by adopting a geological statistical simulation algorithm and a time sequence decomposition algorithm to obtain a safety risk assessment result of the tunnel structure influenced by geological factors and an underground water dynamic change trend prediction result; according to the geological risk analysis result, fusing the tunnel technical condition data by adopting a heterogeneous integration model of a dynamic Bayesian network and an extreme gradient boosting tree, predicting the tunnel technical condition, and generating maintenance decision parameters; optimizing the maintenance decision parameters by adopting a cuckoo search algorithm so as to minimize the maintenance cost under the influence of the geological risk; and outputting decision results including the total maintenance cost distribution based on the geological risk, the technical condition improvement expectation, the rock stratum stability safety factor prediction value and the underground water seepage risk early warning level.

The invention relates to the technical field of foundation pit supporting, and discloses a large deep foundation pit inner supporting system with a safety system.The large deep foundation pit inner supporting system comprises a telescopic rod, a supporting rod, a connecting plate and a soil retaining plate, one end of the telescopic rod is rotationally connected with a connecting block through a pin, the connecting block is movably provided with an elastic assembly, and the elastic assembly is connected with one side of the supporting rod; the elastic assembly reserves an elastic telescopic space between the supporting rod and the telescopic rod and is used for detecting displacement generated when the supporting rod and the soil retaining plate support the foundation pit, clamping grooves are formed in the two opposite sides of the soil retaining plate, and an assembling structure is arranged on one side of the supporting rod. According to the large-scale deep foundation pit inner supporting system with the safety system, prestress can be effectively applied to the side wall of the foundation pit, so that the periphery of the pit wall has certain supporting force, the deformation condition of the side wall of the foundation pit can be monitored, meanwhile, underground water seepage of a soil layer of the foundation pit can be eliminated in time, and the safety coefficient during foundation pit supporting is improved.

The invention belongs to the technical field of rock-soil side slope protection, and particularly relates to an expansive soil side slope flexible ecological comprehensive supporting system which comprises an intercepting ditch, a vegetation protection layer, a composite waterproof layer, flexible anchor rods, water seepage and drainage pipes, cultivation and planting soil, a drainage ditch, a backfill soil layer, a step-shaped slope surface, a slope surface and slope protection vegetation. The slope surface is excavated into a step-shaped slope surface, a composite waterproof layer, expansive soil backfill soil, a vegetation protection layer and cultivation and planting soil are sequentially arranged on the step-shaped slope surface from bottom to top, and slope protection vegetation is planted and formed on the cultivation and planting soil; the composite waterproof layer is fixed to the step-shaped slope face through the flexible anchor rods. The vegetation protection layer and the slope protection vegetation together reinforce the shallow soil body, and the composite waterproof layer and the flexible anchor rod play a role in absorbing and relieving the received expansive force. The method has an ecological greening effect, has the functions of common supporting of the shallow surface layer and the deep layer of the expansive soil slope, flexible reinforcement and expansion reduction and allowable generation of a small amount of deformation, is simple in construction and high in efficiency, and can realize long-term stability of the shallow surface layer and the deep layer of the expansive soil slope.

The invention discloses a preparation method of a modified reinforced recycled aggregate high-strength hydrophobic cement-based material, which comprises the following steps: (1) placing recycled concrete coarse aggregate in an acrylic acid solution for standing, separating out the coarse aggregate after standing, placing the coarse aggregate in modified slurry formed by calcined waste concrete micro powder, a silane coupling agent and water for coating, and drying to obtain the modified reinforced recycled aggregate high-strength hydrophobic cement-based material; and then separating out the coarse aggregate and drying to obtain the modified reinforced recycled aggregate. And (2) mixing cement powder, the modified reinforced recycled aggregate, river sand fine aggregate, filler powder and a water reducing agent, adding water, and uniformly stirring to obtain the maritime work cement-based material. According to the invention, the recycled concrete aggregate is modified and reinforced by using the concrete waste generated by the commercial mixing station, and a hydrophobic anti-seepage system is constructed in the concrete material, so that the strength and the water seepage resistance of the concrete material are effectively improved, and the concrete material can better adapt to the application in the marine environment.

The invention relates to a device and a method for simulating influence of underground water seepage on an existing tunnel and a freezing wall, the device comprises a test box body, a tunnel model, a seepage system, a data acquisition monitoring system, a saline water circulation cooling system and a saline water circulation heating system, the test box body is formed by splicing three box bodies with different structures; a formed space area is used for laying a test soil body and a broken stone hardcore; the tunnel model is arranged in the hollow area in the test box body; the seepage system is used for providing an underground water source for simulating seepage; the data acquisition monitoring system is used for monitoring and recording the soil pressure and displacement of the soil body around the tunnel model and the temperature change of the soil body near the freezing pipe; the saline water circulating cooling system is used for providing cooling capacity required by soil body freezing; and the saline water circulation heating system is used for providing heat required for pulling out the freezing pipe. The device can be used for simulating the influence of groundwater seepage on soil deformation and soil pressure around the existing tunnel, adjusting the seepage direction of groundwater and restoring more real groundwater seepage movement.

The invention discloses a novel simulation method for representing underground water level space-time evolution, and belongs to the technical field of computer machine learning. A novel simulation method for representing underground water level space-time evolution comprises the following steps: acquiring long-time sequence underground water level data based on an underground water long-term observation hole; according to the underground water level information, multiple hydrogeological parameter information is superposed, a two-dimensional underground water seepage equation is used as a physical mechanism, a neural network model with the physical mechanism in a region is constructed, and then time and space evolution of the underground water level in the region is simulated; reasonable use of groundwater resources can be enhanced, scientific and effective supervision is implemented, and a scientific basis is provided for protecting the safety of regional groundwater and promoting sustainable development of the groundwater resources.

Interlocking construction blocks of a type that can be used as part of a system for building various structures, such as walls. An individual block provides positive intermeshing with other blocks abutting thereto and positive interlocking with other blocks stacked thereon, forming a joint that allows the abutting blocks to be held together without the need for mortar. Interlocked blocks are capable of providing a barrier against horizontal water seepage along the joints from one side of the interlocked blocks to the opposite side. The blocks provide a relatively light-weight structural unit while still providing good structural strength against horizontal and vertical loads. The blocks may be formed at least partly of recycled waste material(s) and / or may themselves be made of materials that can be easily recycled, thereby providing an environmentally friendly construction material that may have a reduced carbon footprint compared to other construction block systems.

The invention belongs to the technical field of intelligent AI for rainfall analysis and landslide early warning, and discloses an intelligent AI-based rainfall data analysis highway landslide early warning system, which comprises a slope hydrologic monitoring module, a slope damage detection module, an anti-slide pile dynamic monitoring module, a landslide risk analysis module and a risk early warning output module, a slope landslide risk prediction model is constructed by collecting rainfall, water seepage amount, slope structure damage state parameters, pressure difference value of two sides of an anti-slide pile and pile-soil gap variation key data in real time; and the pressure difference value of the two sides of the anti-slide pile, the structural damage state parameters and the rainfall capacity are subjected to cross dynamic association through time sequence characteristics, the water seepage amount and the pile-soil gap variation are fused, and the landslide risk level is output through the dynamic risk amplification factor and the soil saturation critical index. The real-time performance and accuracy of landslide early warning can be remarkably improved, and the method is suitable for highway slope safety monitoring under complex geological conditions.

The utility model discloses a combined device for preventing water seepage of a pre-stressed anchor cable for foundation pit supporting, which comprises an anchor cable, an anchor cable channel and a waist beam, the anchor cable is mounted in the anchor cable channel, the waist beam is mounted at the outer end of the anchor cable channel, a water-swelling waterstop ring is sleeved on the anchor cable, a grouting pipe is pre-buried in the waist beam, and the grouting pipe is connected with the anchor cable channel. One end of the grouting pipe extends out of the waist beam, the other end of the grouting pipe extends into the anchor cable channel, when leakage occurs, epoxy resin slurry is poured into the grouting pipe, and the epoxy resin slurry enters the anchor cable channel and swells when encountering water to form a colloidal consolidation body to block the water seepage channel. According to the utility model, a water stopping barrier can be effectively formed in the anchor cable channel, and the leaking stoppage construction operation is convenient and fast.

The invention relates to the technical field of analysis methods of ground materials, and discloses a sand liquefaction characteristic test device and a test method thereof, the sand liquefaction characteristic test device comprises a vibration table, a box body, an inverted filter assembly, a detection assembly and an analysis assembly; the box body is connected with the vibration table, a water inlet and a water outlet are formed in the box body, a flow stabilizing chamber, an inverted filter layer and a sample layer for placing a saturated sand sample are sequentially arranged in the box body from bottom to top and are communicated, the water inlet is communicated with the flow stabilizing chamber, the water outlet is communicated with the top of the sample layer, and the inverted filter assembly is arranged in the inverted filter layer; the detection assembly comprises a first accelerometer and a pore water pressure gauge, and the detection assembly is electrically connected with the analysis assembly; water is injected into a saturated sand sample through a water inlet, underground water seepage and seepage failure are simulated, and then sand seismic liquefaction is simulated through a vibration table. According to the invention, seepage and seepage failure effects of an actual saturated sand stratum under the action of underground water can be considered, and the earthquake liquefaction phenomenon of sand can be simulated more truly.

The invention relates to a water-rich silt layer deep foundation pit waterproof curtain leakage rapid plugging system and a construction method, through a foundation pit filler isolation water diversion pressure relief plugging technology, plugging is carried out through fillers such as cotton fibers, then water diversion pressure relief flow guiding is carried out through a flow guiding device, the flow guiding device is convenient to manufacture, construction steps are simple, and the construction cost is low. Quick plugging of leakage points is realized, and the construction efficiency is improved; by means of the section steel support flexible cable net water injection bag rapid back pressure technology, when water seepage occurs around the foundation pit, water is injected into the flexible cable net water injection bag through a water injection device, the bag expands to generate reverse pressure, the wall of the foundation pit is pressed, a leakage channel is rapidly blocked, water seepage is prevented, and construction safety is guaranteed. Meanwhile, the water injection rate and pressure are flexibly controlled through the water injection system, and the requirements of different foundation pit environments can be met; through the back pressure technology after the built-in gravel perforated drainage pipe blind ditch, the underground water level in the foundation pit is effectively controlled, and the foundation pit leakage phenomenon is reduced.

The invention relates to a test device and method for simulating underground hot water seepage tunnel temperature and humidity field evolution. The test device comprises a tunnel model, a partition heating device, a hot water seepage simulation device, a temperature and humidity monitoring device and a ventilation device. The partition heating device covers the outer wall of the tunnel model and is used for simulating high-temperature surrounding rock; the hot water seepage simulation device is located on the inner side of the tunnel model, sprays hot water to the inner surface of the tunnel model and is used for simulating lining inner surface hot water seepage. The hot water exudation simulation device is provided with a thermal imager and a laser thermodetector and is used for obtaining the inner wall temperature field distribution of the tunnel model; the temperature and humidity monitoring device is arranged in the tunnel model and is used for measuring a temperature and humidity field in the tunnel model; the ventilation device is located at the top in the tunnel model. According to the invention, a high-temperature groundwater discharge type tunnel and tunnel high temperature and water seepage can be truly simulated, ventilation parameters of the ventilation device can be timely adjusted according to the evolution law of a temperature and humidity field in the tunnel, and the temperature and humidity environment of the tunnel can be accurately regulated and controlled.

The invention provides a waterproof plug connector based on dynamic sealing compensation, which is applied to the technical field of plug connector connection and comprises a plug connector male seat and a plug connector female seat, the plug connector male seat and the plug connector female seat are both provided with threading holes, the plug connector male seat is provided with a plug connector mounting hole, a dynamic sealing element is arranged in the plug connector mounting hole, and the dynamic sealing element is arranged in the plug connector male seat. The sealing air bag can be extruded to achieve sealing in the plugging process of the plugging male seat and the plugging female seat, and when water seepage occurs, water can be absorbed and the sealing air bag can be further extruded to expand, so that sealing between the plugging male seat and the plugging female seat is tighter, dynamic sealing is achieved, the waterproof effect is better, and the service life of the plugging male seat and the plugging female seat is prolonged. The anti-dragging blocking piece is arranged in the threading hole, double sealing can be conducted on a gap between the wire and the threading hole through the plug and the rubber ring, meanwhile, the wire in the threading hole can be fixed, when the wire is pulled, the wire can be prevented from being dragged out, and the stability of wire connection is improved.

The invention relates to the technical field of water seepage performance detection, in particular to a backpack water seepage performance rapid detection device which comprises a detection box, an extrusion mechanism is arranged at the bottom of the inner wall of the detection box, a trowelling mechanism is arranged on the extrusion mechanism, a pressing mechanism is arranged at the top of the inner wall of the detection box, and a filtering mechanism is arranged on the outer wall of the detection box. The extrusion mechanism comprises a collection pipe fixedly penetrating through the bottom of the inner wall of the detection box, the top end of the collection pipe is fixedly connected with a placement ring, and a storage cavity for storing sealant is formed in the placement ring; according to the device, the smearing efficiency can be improved, sealant can be uniformly smeared around a to-be-tested area through the arrangement of the trowelling mechanism, so that the consistent smearing thickness is ensured, the sealing effect is further ensured, the accuracy of water seepage performance detection is improved, and under the cooperation of the structure, the detection work of the terylene knapsack can be rapidly completed, and the detection efficiency is improved. The detection efficiency is improved.

According to the waterproof composite PET plate disclosed by the invention, a small amount of permeated water can be rapidly absorbed through a water absorption block and water flow is guided to an expansion block, and the expansion block expands after absorbing water and extrudes a sealing sleeve, so that the sealing performance of a splicing area is remarkably enhanced; the water seepage treatment efficiency is further optimized through the flow guide blocks and the flow guide bundles, a secondary sealing barrier is formed under the condition that the water seepage amount is increased, and further water seepage is effectively prevented; in addition, the flow guide heat absorption plate can accelerate water vapor discharge and recover the water absorption capacity of the water absorption block and the expansion block through the design of a wave-shaped structure and evaporation anti-seepage holes in combination with heat transfer of heat conduction fibers, the service life of the assembly is prolonged, and the modular design is adopted, so that the production cost is reduced, and the production efficiency is improved. The whole protection system is convenient to install, maintain and replace, is suitable for scenes such as building outer walls needing waterproof splicing, and has the remarkable protection effect and economical efficiency.

The invention discloses a dam underwater seepage point detecting and plugging integrated system and method, and relates to the field of dam safety maintenance. The dam underwater seepage point detection and plugging integrated system comprises a suspension frame and further comprises a sleeve fixedly connected to the suspension frame; the piston disc is connected in the sleeve in a sliding manner; one end of the spring is fixedly connected with the inner wall of the sleeve, and the other end of the spring is fixedly connected with the piston disc; through the synergistic effect of the sealing air bag, the spring piston disc and the conducting ring warning indicator, efficient and reliable plugging is achieved, the sealing air bag expands to fill gaps, water seepage is isolated, equipment is fixed, and the impact resistance is enhanced through the L-shaped design; the spring is matched with the piston disc, so that the gap is uniformly filled with polyurethane, the piston disc moves to supply air to the air bag, and the whole-course sealing stability is ensured; the conducting ring and the warning indicator feed back the plugging state in real time, diving operation of personnel is avoided, and efficiency and safety are improved.

The present invention relates to a sealing method for high-flow water inrush at a side wall of a foundation pit, the method comprising: calculating the minimum radius of a counter-pressure soil berm on the basis of the flow time of a liquid slurry in the counter-pressure soil berm being not less than the chemical setting time of the liquid slurry; piling up filtering sand bags on a foundation pit excavation face at a water inrush point, and constructing the counter-pressure soil berm; constructing annular grouting holes at the foundation pit on the outside of support piles and a cut-off curtain; according to the planar arrangement of the annular grouting holes, successively injecting a double-liquid slurry formed by mixing a cement slurry and sodium silicate into the annular grouting holes; inspecting the water seepage condition on the periphery of the counter-pressure soil berm until no water seepage occurs on the periphery of the counter-pressure soil berm; and excavating the counter-pressure soil berm layer by layer until the excavation reaches the pit bottom without water seepage observed at a side wall of the foundation pit. The present invention has the beneficial effects that: the size of the counter-pressure soil berm is optimally designed on the basis of the condition that the flow time of the double-liquid slurry in the soil berm is longer than the setting time, so as to solve the problems of slurry setting failure and poor grouting and sealing effects, thus saving a large amount of grouting materials, and reducing economic loss caused by secondary sealing.

The utility model discloses a household snow melting machine which comprises a stirring assembly and a refrigerating assembly, the stirring assembly comprises a protective cover, a driving motor and a scraper, the refrigerating assembly comprises an evaporator, the evaporator is arranged on the side portion of the driving motor and connected with the protective cover, the stirring assembly further comprises a sealing ring, and the sealing ring is arranged on the side portion of the driving motor and connected with the scraper. The sealing ring comprises an inner sealing ring, a sealing outer ring and a sealing inner ring, the sealing outer ring and the sealing inner ring are arranged on the front side and the rear side of the inner sealing ring respectively, an inner ring plate is arranged at the end of the protection cover, the evaporator penetrates through the inner ring plate, the sealing outer ring abuts against the surface of the side, close to the evaporator, of the inner ring plate, and the sealing outer ring abuts against the surface of the side, close to the evaporator, of the inner ring plate. The sealing inner ring abuts against the surface of the side, close to the driving piece, of the inner ring plate, and the inner sealing ring is arranged at the joint of the inner ring plate and the outer wall of the evaporator. According to the utility model, the sealing performance and the waterproofness can be improved, water seepage and oil seepage are prevented, potential safety hazards are avoided, and the service life is prolonged.

The invention relates to the technical field of building construction, and discloses an outer wall facade deformation joint hidden type curtain wall sealing structure and a construction method. Comprising positioning parts which are fixedly arranged on the two sides of a deformation joint; ePDM (ethylene-propylene-diene monomer) telescopic rubber strips are arranged between the two positioning components. The EPDM telescopic adhesive tape can completely cover the deformation joint; the EPDM telescopic adhesive tape, the chemical bolt, the keel and the aluminum plate are fixed to the deformation joint, the deformation joint cover plate and the deformation joint cover plate lock catch are arranged to hide the deformation joint, and therefore the appearance effect is achieved, meanwhile, the problems of cracks, damage and the like of a building in the later period are avoided, the service life of the building is prolonged, water seepage is reduced, and the construction quality is improved. Attractiveness is improved, and later maintenance cost is saved to a certain extent; the structure can avoid the influence of expansion and contraction of materials, release of structural stress and earthquake deformation on the structure, does not influence the appearance effect of the building, and is suitable for industrial and civil building facade deformation joint construction.

The utility model discloses an inner supporting rod mechanism of a pouring formwork of a single-row rib vertical plate. The inner supporting rod mechanism solves the problem of how to stably and reliably position an inner supporting rod and eliminate the hidden danger of water seepage of the vertical plate. A combined type inner supporting rod mechanism is constructed, the mechanism is formed by combining a main body supporting rod and adjustable conical blocks at the two ends, and the main body supporting rod, the conical blocks and the main body supporting rod are supported between the two vertical formworks after being combined and connected so as to stably support the two vertical formworks; cross-shaped reinforcing wing plates are arranged on the main body supporting rod, a vertical steel bar connecting moving block and a transverse steel bar connecting moving block are embedded between every two adjacent wing plates, a vertical clamping ring base is connected to each vertical steel bar connecting moving block in a threaded mode, and a vertical rotatable clamping ring is movably connected to each vertical clamping ring base. The vertical rotatable clamping ring is clamped with a vertical steel bar in a single row of steel bars, so that the main body supporting rod is stably fixed on the single row of steel bars, and the combined type inner supporting rod is extruded and positioned by the two vertical templates, so that the positioning of the inner supporting rod between the two vertical templates is realized.

The invention discloses an osmometer for safety monitoring of a reservoir dam, which relates to the technical field of safety monitoring, and comprises an outer shell for providing a protection effect, a water seepage hole arranged at the end part of the outer shell, a diaphragm for detecting and judging water pressure, and an electromagnetic coil for detecting the vibration frequency of a steel wire connected with the diaphragm, and the tension adjusting mechanism is used for detecting and adjusting the tension of the steel string in real time so as to ensure the detection accuracy. According to the scheme, the tension adjusting mechanism is additionally arranged at the tail end of the steel string, the tension of the steel string can be detected in real time, when the tension of the steel string is externally influenced or changes, the tension of the steel string can be adjusted in real time, the stability of the steel string in the later use process is guaranteed, and the service life of the steel string is prolonged. Secondly, in consideration of the basic principle when the steel string is used for detection, fixation and movement of the tail end need to be considered, real-time adjustment and fixation of the steel string are synchronously guaranteed according to actual requirements, and therefore it is guaranteed that the steel string can work correctly.

The invention relates to the technical field of thermal insulation walls, and discloses a building thermal insulation wall and a thermal insulation method for buildings, the building thermal insulation wall comprises a thermal insulation board, edge expansion nails and center expansion nails, a keel is fixedly arranged in the thermal insulation board, a plurality of buckles extending to the top of the thermal insulation board are installed on the keel, and the buckles are used for reinforcing an anti-crack layer. By arranging the keel, the edge expansion nail, the center expansion nail, the buckle and the clamping assembly, fastening of the center of the insulation board is achieved through clamping of the clamping assembly and the center expansion nail when the insulation board is installed, compared with the mode that the center of the insulation board is directly fixed through the expansion nail, the situation that the insulation board is damaged by drilling is avoided, and the water seepage probability of the insulation board is reduced; in addition, the clamping assembly can further drive the buckle to fasten the anti-crack layer on the heat preservation plate, the compactness of connection between the anti-crack layer and the heat preservation plate is improved, follow-up falling is avoided, and the safety is further improved.

The invention provides a water seepage detection device for road pavement asphalt construction, and relates to the technical field of asphalt pavement detection. An auxiliary part is placed on the bottom face of the detection body, a switch structural part is installed on the top face of the detection body, a supporting rod is fixedly welded to the top face of the detection body, a base table is fixedly connected to the top face of the supporting rod, a metering cylinder is fixedly clamped to the top face of the base table, and a balancing weight is arranged at the top of the detection body. A blocking plate in the switch structural member is clamped in a metering cylinder, the angle of the blocking plate can be judged by rotating an indicating plate, and after detection is completed, a pressurizing plate can be driven to move towards the two sides by rotating the indicating plate reversely, so that holes in the inner wall of a drainage pipe can also be used for drainage, the drainage speed is increased, and the problem that the blocking angle of a valve to the drainage pipe is difficult to judge is solved. And the drainage speed cannot be increased when the detection liquid in the drainage pipe is discharged after the detection is completed.

The invention relates to the technical field of color steel plate roofs, in particular to a leakage-proof color steel plate roof connecting structure and a mounting method thereof.By arranging pressing strips and sealing strips, the connecting ends of adjacent color steel plates can be pressed and sealed, so that water seepage at the joints of the adjacent color steel plates is effectively avoided, and the service life of the color steel plates is prolonged. And through the arrangement of the ridge plate, the rubber pressing strip and the water stop strip, the connecting end of the two color steel plate roofs can be sealed, so that the situation of ridge water leakage is prevented, and the use effect is good.

The invention discloses a hydrothermal coupling model test system and a hydrothermal coupling model test method for simulating a liquid nitrogen frozen stratum in different seepage environments. The system and the method are used for experimental research of a multi-physical field coupling effect of a test object in a large-seepage liquid nitrogen frozen stratum. The model test system comprises a liquid nitrogen freezing system, a flowing water seepage circulation system and a monitoring system, the liquid nitrogen freezing system is used for controlling the temperature of a liquid nitrogen freezing pipe embedded in a sand layer by changing the liquid nitrogen flow, so that the test sand layer is quickly frozen; the flowing water seepage circulation system simulates different underground water seepage speeds through a pressure pump, and the temperature of test water is kept constant through a heating rod. The monitoring system is used for recording the change trend of the temperature field and the seepage field in the liquid nitrogen stratum freezing process. According to the device, the ultra-low temperature effect of the liquid nitrogen is utilized to perform top-speed freezing on the sand layer under the high-flow-speed seepage environment, so that the freezing curtain can be effectively closed, and the evolution law of a large-seepage-flow stratum liquid nitrogen artificial freezing temperature field and a seepage field is obtained by simulating the liquid nitrogen stratum freezing process under different seepage environments; and a basis is provided for manual liquid nitrogen freezing construction of the large-seepage stratum.