168 results about "Percolation test" patented technology

The invention discloses a fluid-solid-heat coupling triaxial servo percolation device for gas-contained coal, comprising a lifting stand, a hydraulic servo control system, an axial loading device mounted at the top of the lifting stand and a triaxial pressure chamber connected with the lower end of the axial loading device. A thermostatic water tank is arranged below the triaxial pressure chamber; a movable worktable is arranged above the thermostatic water tank; the lower end of the triaxial pressure chamber is arranged on the movable worktable; heating tubes are arranged in the thermostatic water tank; and a water inlet valve, a water drain valve and a water-bath circulating water pump are arranged outside the thermostatic water tank and are communicated with the thermostatic water tank. In the hydraulic servo control system, an axial compression loading oil pump is communicated with an oil inlet and an oil outlet by a pipeline, and a peripheral compression loading oil pump is communicated with an oil intake/drain hole by a pipeline. The fluid-solid-heat coupling triaxial servo percolation device for gas-contained coal can carry out the research of gas-contained coal percolation tests in states, such as different terrestrial stresses, different gas pressures, different temperatures, and the like and the distortion and failure characteristics of the gas-contained coal in a percolation process.

The invention provides a rock high-pressure permeability test system, comprising a sample depression box device which is provided with a heavy frame inside, a hydraulic jack positioned inside the heavy frame, a movable trolley positioned on the top of the hydraulic jack, and a triaxial depression box fixed on the movable trolley, wherein, the triaxial depression box comprises a confining pressure chamber body, a depression box base with an seepage water inlet and a confining pressure water inlet, a lower actuating post system which is positioned on the depression box base and is communicated with the seepage water inlet and a seepage water channel on the sample, an upper actuating post system of the seepage water outlet which is positioned on the top of the depression box and is communicated with the seepage water channel on the sample. The test system is provided with an oil-water converting dynamic control system which is connected with the hydraulic jack, the seepage water inlet and the confining pressure water inlet respectively. The invention can test the permeability of the sample under various conditions, conventional triaxial mechanical characteristics of various loading paths, the seepage at a high permeability pressure, and the stress coupling process and can control the shaft pressure, the confining pressure, the permeability pressure and the axial displacement accurately.

The invention discloses a soil one-dimensional consolidation, penetration, stressing relaxation combined test instrument and usage, which posits punch inside a punch cavity at the bottom of pressure container. It can do consolidation and compression to the same soil sample K0, it also can do soil sample penetration test and stressing relaxation test directly and simultaneously. It can test the soil sample's value of coefficient of static lateral pressure K0 and the process of pore water pressure followed by time. The test instrument and method can arrange soil's consolidation characteristic parameter by test outcome and using theoretical formula penetration method. It can do soil's theological behavior analysis by the outcome of stressing relaxation test.

The invention discloses a device for testing the durability of a water pressure resistant grouted rock, which comprises a pressure chamber, a control cabinet, heating equipment, pressurizing equipment, measuring equipment and accessory equipment, wherein the heating equipment can supply a stable heat source for the pressure chamber; the pressurizing equipment can provide confining pressure and osmotic pressure for the pressure chamber; the pressure chamber can apply an axial pressure by means of a universal test, is corrosion resistant and can realize annular and vertical penetration tests of three kinds of standard samples of different dimensions at different temperatures and pressures; the measuring equipment can realize accurate measurement of temperature, pressure and flow rate; and the control cabinet can realize the accurate control of pressure and temperature. The device can be used for indoor researches on the durability of tunnel water pressure resistant grouted rock or dam impervious curtain in an environment of high-water-pressure and corrosive environment, and at the same time, realizes the researches on the change rule of the permeability of a rock sample under the coupled actions of a temperature field, a seepage field, a stress field and a chemical field.

The invention discloses a cross-site script vulnerability detection method based on a percolation test. According to the cross-site script vulnerability detection method, the technical problem of low detection efficiency in a traditional cross-site script vulnerability detection method is solved. The technical scheme provided by the invention is that the cross-site script vulnerability detection method comprises the following steps of: firstly, acquiring a page; secondly, extracting form information and carrying out the percolation test on the extracted form; and finally, carrying out session retaining and redirection tracking. Due to the adoption of a session retaining and redirection tracking method, the conditions that the analysis for Web pages is incomprehensive are reduced, all pages of a Web site are analyzed and detected and further the automatic detection capability is improved. According to a percolation test strategy, the detection range of the XSS (Cross-Site Script) is gradually narrowed and the depth detection for the safe pages is avoided. While test statements are injected, test statements for closing HTML (Hypertext Markup Language) statements are actively constructed according to the returned page information, so that interaction frequencies with a server are reduced and the detection efficiency of the XXS vulnerabilities of large complex Websites is improved.

The invention discloses a multi-field coupling penetration test device and a multi-field coupling penetration test method for cracked rock. The device comprises a computer servo control system, a confining pressure chamber, a hydraulic system, a temperature control system and a chemical solution system, wherein the hydraulic system and the confining pressure chamber are connected by virtue of a confining pressure device, an axial pressure device and a seepage device respectively; the temperature control system is arranged outside the confining pressure chamber; and the chemical solution system is connected with the seepage device. The test method comprises the following steps: opening the hydraulic system, and loading an oil source; putting a sample into a pressure chamber; loading axial pressure and confining pressure; loading the seepage pressure; loading a chemical field; applying temperature; and measuring the data. The four-field loading systems are independent from one another, the evolution test research of permeability characteristics and mechanical properties of the cracked rock can be really simulated under high water pressure, large hydraulic gradient, temperature change and water chemistry complicated conditions, and the whole-process experimental research of rock deformation damage and penetration, stress, chemistry and temperature coupling can be performed.

The invention discloses a negative pressure osmosis test device which comprises a base, a soil sample ring, a porous permeable stone, a water storage container, an electronic balance, a vacuum pump, a pressure gauge and a sealed container, wherein the soil sample is arranged in the cylindrical soil sample ring, the upper end of a sample is connected with the water storage container, and the bottom end of the sample is connected with the sealed container and the vacuum pump; a pressure difference is formed at two ends of the soil sample through vacuum-pumping, and water seeps in the soil sample under the action of the pressure difference; an osmotic coefficient of the soil sample can be obtained through calculating the amount of water passing though the soil sample in unit time; a load applying piston at the upper end of the sample can apply vertical load so as to solidify the soil; osmosis tests of different solidifying pressures can be performed to simulate the seepage of the practical field soil under different stress environments; the osmosis test can be directly performed on the prepared soil sample. Therefore, the test device has the advantages of simple structure, convenience in use, quick and convenient test, and obviously shortened test time, and is particularly suitable for the osmosis test of low-osmosis soil samples.

Design manufacturing and application of a triaxial penetration tester of the invention breaks through the limitation of permeability coefficient testing in Standard for soil test method GB/T50123-1999 and Specification of soil test SL237-014-1999. According to the invention, the tester is designed based on a varying-head principle; with water head with a height of up to 47 m provided by an air compressor, a constant head can be used to process the test results. Coarse grained soil and fine grained soil can be calculated both by a constant head and by a varying head, and the results are of the same order of magnitude and are quite close to each other. The tester of the invention comprises an air compressor, a penetration tester frame, a triaxial penetration pressure chamber, a liquid level sensor, a test data collector and a receiver, a data processing software, and a computer. Data are read on-line, are stored automatically, and samples of 10-9 cm/s or lower can be tested. The tester of the invention can test permeability coefficients of undisturbed soil, disturbed soil, and additive mixtures of soil and cement. The sample preparation method is simple and practical; the test is rapid and convenient, and covers the application fields which require permeability coefficient testing in soil mechanics or materials science.

The invention belongs to the field of penetration experimental apparatuses and specifically relates to a multifunctional integrated cap pressing type pressure chamber in a rock coupling penetration test and a test method. The multifunctional integrated cap pressing type pressure chamber comprises a pressure chamber body, a pressure chamber base, a pressure chamber cover, a confining pressure oil inlet, a seepage outlet, a seepage inlet, a pressure chamber lock cap, a hoisting cylinder, an upper pressing head, an upper penetrating plate, a test part, a lower penetrating plate and a lower pressing head, wherein the pressure chamber base is located at the bottom of the pressure chamber; the pressure chamber cover is located at the top of the pressure chamber; the confining pressure oil inlet and the seepage outlet are located at the bottom of the pressure chamber; the seepage inlet is located close to the top of the pressure chamber; the pressure chamber lock cap is located on the outer side of the pressure chamber base and is connected with the pressure chamber base; the hoisting cylinder is arranged at the top of the pressure chamber; the upper pressing head, the upper penetrating plate, the test part, the lower penetrating plate and the lower pressing head are successively arranged in the pressure chamber body; the seepage outlet is successively connected with a cooling water tank and a volume variation gauge. The invention provides a pressure chamber with high safety, degree of automation and multifunction and the test method; complex operation and potential safety hazards are avoided; the pressure chamber is fit for the rock tri-axial coupling penetration test under the coupling effect of temperature-seepage-stress- chemistry (THMC).

The invention relates to a creep permeation full-distance coupling test system for a broken rock sample, and the system provided by the invention comprises a hydraulic axial loading system, a permeating system and a data display and monitoring device, wherein the axial loading system is used for supplying and maintaining a stable oil-way pressure through a plunger pump, an electromagnetic relief valve, an one-way valve, a pressure relay, an energy storage and a two-position four-way reversing valve; the axial loading system is also used for loading and maintaining an axial force by utilizing the stable pressure in the oil-way through a hydraulic cylinder, a circular tube and a piston; the permeating system is used for permeating the broken rock sample sealed in a cylinder from bottom to top by utilizing a motor-driven pressure-testing pump, a water inlet pipe, the one-way valve, a felt layer and a porous water-permeable plate; the creep and permeation test process is displayed and monitored in real time by using a pressure gage, a water pressure gauge, a pressure sensor, a displacement meter and a flow sensor; and the whole system is arranged on a flat cart with idler wheels, thereby facilitating movement. The system has a simple structure, is quickly sealed, is conveniently operated, and is suitable for the compression creep, permeation and creep permeation full-distance coupling test for the broken rock.

The invention relates to a large-size rock fracture permeability test system and a measuring method thereof. The large-size rock fracture permeability test system comprises a self-circulation water supply tank, a constant-pressure water tank, a water inlet end cap, a water outlet end cap, a horizontal rock fracture, pitot piezometer tubes and a constant water head water collecting system, the self-circulation water supply tank is connected with the constant-pressure water tank through a water supply tube and a water return tube, the water inlet end cap is connected on the constant-pressure water tank, two ends of the horizontal rock fracture are abutted to the water inlet end cap and the water outlet end cap respectively, the pitot piezometer tubes are arranged on the water inlet end cap and the water outlet end cap respectively, and the constant water head water collecting system is connected with the water outlet end cap. The large-size rock fracture permeability test system is simple in structure, convenient to operate and high in test accuracy and can make permeability test research on rock fractures with series of sizes (10cm*10cm-100cm*100cm), and change laws of rock fracture permeability changing along with the sizes of the fractures are analyzed.

The invention provides a triaxial permeability testing device, belonging to the field of testing technique of soil mechanic property, in particular relates to a triaxial permeability testing device which is used for measuring the permeability characteristic of the soil under different stress and strain conditions; the technical proposal is that the shape of a base and a top cap is reconstructed on the basis of a triaxial shear instrument; water inlet holes and water inlet pipelines are added on the base during the permeability process in three directions; water outlet holes and water outlet pipelines are added on the top cap during the permeability process in three directions; the specimen generates shear deformation by surrounding pressure and an axial pressure system; the permeability of the specimen under different shear deformation conditions in any one direction out of the three directions is achieved by changing the connecting and closing type of the water inlet pipeline and the water outlet pipeline and applying the permeability pressure on the specimen by the water pressure system. The shaped of the improved base and top cap is beneficial for arranging water inlet pipelines and water outlet pipelines and facilitates achieving the permeability test in any one direction out of the three directions; and the shifting operation of the connecting type of the water flow pipelines of different permeability directions is simple and the control is convenient.

The invention relates to an early warning method for a sudden gushing water danger of an undersea tunnel. The early warning method for the sudden gushing water danger of the undersea tunnel includes that step S1, using a geophysical exploration method and an advanced geological drilling method to extract rock and soil test samples, and performing indoor physical and mechanical tests and a penetration test; step S2, monitoring and measuring measured data, surrounding rock and vault sedimentation and side wall displacement in the field, and building a grey cusp catastrophe time forecasting model for the instability of a surrounding rock or surrounding rock-primary support system; step S3, obtaining surrounding rock support design parameters through a parabolic vertex numerical inverse analysis method; step S4, building a visco-elastic plastic model of the surrounding rock or surrounding rock-primary support system of the undersea tunnel under high pressure water based on an ABAQUS platform simulation software according to the step S1, step S2 and step S3 to early warn the danger. The early warning method for the sudden gushing water danger of the undersea tunnel is capable of improving the reasonable design, safe construction, comprehensive water bursting control and the like of the undersea tunnel of the soft cracked surrounding rock under high pressure water.

The invention discloses a method and a device for an in-situ penetration test by means of water injection under drilling pressure. The method includes A, drilling a hole on a tested object; B, inserting a water injection pipe, which is provided with a water replenishing container at the upper end, into the drilled hole; C, arranging a sealing plug between the inner wall of the drilled hole and the water injection pipe and forming a sealed test section between the position below the sealing plug and the bottom of the drilled hole; D, fully injecting water into the test section via the water injection pipe until the liquid level reaches the inside of the water replenishing container; E, starting counting and timely replenishing water into the water replenishing container to keep the liquid level in the water replenishing container stable relatively; and F computing penetration flow of the test section within unit time according to the quantity of the replenished water within a period of time and further computing a penetration coefficient of the tested object. The method and the device can be used for testing foundation structures with lower penetration coefficients, head pressure meeting requirements can be provided, stable flow can be tested, and the required penetration coefficient is obtained finally.

The invention belongs to the technical field of soil test research, and particularly relates to a consolidation and penetration measuring device. The measuring device can carry out a consolidation test and a penetration test at the same time. The consolidation and penetration measuring device enables test operation to be simple and convenient and enables test results to be accurate. The consolidation and penetration measuring device comprises a pressurization cylinder, and is characterized in that a pressurization piston is arranged in the pressurization cylinder; the pressurization piston can move upwards and downwards in an inner cavity of the pressurization cylinder, and gaps are reserved between the pressurization piston and a cylinder wall of the pressurization cylinder; and a water inlet is formed in a base of the pressurization cylinder, and a water overflow port is formed in the cylinder wall on the upper portion of the pressurization cylinder.

The invention belongs to the technical field of detecting equipment of soil tests and in particular relates to an automatic detecting and metering device and an automatic detecting and metering method for rock-soil permeability. The device comprises an automatic compensation water tank and a permeameter communicated with the automatic compensation water tank, wherein the permeameter is connected with at least one measuring cylinder unit; the measuring cylinder unit is provided with a vertically arranged measuring cylinder with uniform inside diameter; floaters capable of floating with the ascending of the liquid level are arranged in the measuring cylinder; a plurality of liquid level position sensors capable of sensing the positions of the floaters are arranged on the wall of the measuring cylinder at intervals; and the liquid level position sensors are connected with a programmed electronic control unit. Through the device and by the method, a variable head permeability test function can be realized; the test process completely satisfies the relative national standard and industrial standard regulation; the device can continuously work for 24 hours to automatically detect the record; the batch detection working efficiency of the permeability test is fully improved; and the labour intensity of workers, the detecting work cost and the influence of detection personnel on the detection result is reduced.

The invention discloses an absorption material comprising a top plate, a bottom plate and an absorbing core between the top plate and the bottom plate. The top plate is equipped with a first side and a second side, the first side faces to the side of body, and the second side communicates with the absorbing core for keeping fluids communication. The top plate is also equipped with a first relatively hydrophobic component and a second relatively hydrophilic component. The relatively hydrophilic component extends through the relatively hydrophobic component and is positioned on two sides of the top plate. When the method of flooder acquisition and return percolation test is utilized to measure, the return percolation value of the absorbing material is less than 94 mg, and the fluid acquisition rate is approximately at least 0.10 milliliter per second.

The invention relates to a plastic concrete permeability test device, which comprises a pressure control cabinet and a plastic concrete permeameter connected with the pressure control cabinet. The test device provided by the invention is characterized in that the plastic concrete permeameter contains a pedestal; the upper portion of the pedestal is provided with a rotatable connecting ring, whichis connected with the pedestal through several external handles; the connecting ring is connected with a pressure chamber through screw thread; the pressure chamber is connected with a top cover through screw thread; the top cover is connected with the pedestal through several columns; the center of the top cover is provided with a drift cap positioned on the upper portion inside the pressure chamber; the upper portion of the drift cap is fixedly connected with the top cover through a movable top cover handle; the pedestal on the bottom inside the pressure chamber is provided with a bottom cap corresponding to the drift cap; the bottom cap is equipped with an osmotic pressure adapter and a lower draining exhaust pipe which penetrate the bottom cap and the pedestal; and the drift cap is provided with a confining pressure pipe, an upper draining exhaust pipe and a volume buret-connecting pipeline which communicate with a test piece of the pressure chamber and penetrate the movable top cover. In the meanwhile, the invention also discloses a test method for the device.

The invention discloses a geomembrane gas inflation test device, belonging to the field of hydraulic engineering. The geomembrane gas inflation test device comprises an on-geomembrane equipment container and a below-geomembrane equipment container communicated with the on-geomembrane equipment container, wherein a geomembrane body material to be tested is located between the on-geomembrane equipment container and the below-geomembrane equipment container and used for separating a channel, the on-geomembrane equipment container internally stores upper media for simulating an on-geomembrane environment, the below-geomembrane equipment container is filled with lower media for simulating a below-geomembrane environment, and the bottom of the on-geomembrane equipment container is provided witha first pipe valve interface communicated with a testing system and a second pipe valve interface communicated with a test water source supply device; the bottom of the below-geomembrane equipment container is provided with a third pipe valve interface communicated with the testing system and a fourth pipe valve interface communicated with a drainage system; and a top cover is provided with an air exhaust or water drainage valve. The geomembrane gas inflation test device can be used for conveniently carrying out a membrane material gas inflation destructive test, a membrane material air permeability test and penetration tests before and after membrane material gas inflation destruction.

The invention discloses a multi-field precursor information evolution test device and test method for a large-size fractured rock rectangular cavity water inrush and relates to the field of rock mechanics and pressure-bearing penetration tests. The device comprises a test rack, a loading plate, a sample storage cavity, a side pressure loading system, a vertical loading system, a water pressure loading system, a water temperature adjusting system and a signal acquisition and processing system. After preparing of a large-size rock sample containing a rectangular cavity and a single fracture, thetest device and the test method can be used for researching evolution rules, coupling characteristics and influence factors of multi-field precursor information such as the single fracture surrounding rock stress, displacement, fracture, seepage and temperature in the water inrush process at different excavation depths of the rectangular cavity under water-force coupling. The water pressure loading system, the water temperature adjusting system and the side pressure loading system of the test device can better simulate the geomechanical environment of the fault-containing coal measure strataon the confined water, invert and analyze the mining fault water inrush mechanism in the deep confined water stoping working face so as to monitor and early warn mining fault water inrush.

Belonging to the technical field of medium permeability determination, the invention in particular relates to a test device for determining the permeability of a large-scale single fracture medium under triaxial stress. The device provided by the invention includes: a hydraulic source, an oil distributor, a pipeline pump, a water source, a permeability measurement system, a data collector, a console and a fracture medium permeability test host. The device provided by the invention provides a solution to the technical problems that test devices for testing fracture medium permeability in the prior art can only measure small-scale medium objects and are difficult to realize accurate measurement of large-scale medium objects. The device not only can accurately measure the permeability of large-scale (meter scale) medium objects, but also can ensure the stability and continuity of input and output flow.

The invention specifically relates to an apparatus and method for testing the swelling pressure and saturated infiltration performance of a buffer material, belonging to the field of experimental study of the swelling and infiltration of buffer materials used for geological disposal of high-level waste. The objective of the invention is to provide the testing method capable of acquiring the swelling and infiltration performance parameters of the buffer material bentonite and providing a parameter basis for barrier design of deep geological disposal repositories and projects of high-level wasteso as to overcome disadvantages in the prior art. The method has the following beneficial effects: (1) the swelling pressure of the bentonite under a constant-volume condition can be measured; (2) the swelling pressure and saturated infiltration performance of a sample under different temperature and exhausting conditions can be tested; and (3) the swelling pressure and infiltration coefficient of a same sample can be carried out at the same time, operation is convenient, measurement is fast, and test results are high in precision.

The invention relates to an electronic-clogging experiment device of a geotextile. The device consists of three parts, namely, a penetration test main body device consisting of an experiment table, a permeameter, a piezometer tube and a water head scale, a constant water head supply device consisting of a bracket, an auxiliary water inlet container, a valve, a water supply tube, a constant water head inlet container, a water outlet tube, a constant water head outlet container and an overflowing tube, and a voltage loading device consisting of a direct current power supply, an insulating lead, a metal bolt and a drilling circular metal electrode. By using the penetration test main body device and the penetration test main body device, continuous hydraulic power penetration tests with different hydraulic power gradients can be performed to the geotextile, and continuous electric penetration tests with different hydraulic power gradients can be performed to the geotextile by applying a uniform direct current electric field inside the permeameter through the voltage loading device, so that the influence on the clogging of the geotextile caused by electronic effect can be studied.