CN101514978A - Test method for studying phenomenon of permeable damage on soil body and test device thereof - Google Patents
Test method for studying phenomenon of permeable damage on soil body and test device thereof Download PDFInfo
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- CN101514978A CN101514978A CN 200910026153 CN200910026153A CN101514978A CN 101514978 A CN101514978 A CN 101514978A CN 200910026153 CN200910026153 CN 200910026153 CN 200910026153 A CN200910026153 A CN 200910026153A CN 101514978 A CN101514978 A CN 101514978A
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Abstract
The invention relates to a test method for studying the phenomenon of permeable damage on the soil body and a test device thereof. The method comprises the following steps: generating the permeable damage by changing the time-varying hydraulic head difference applied to a soil body sample; and burying a plurality of pore water pressure measuring devices and soil pressure measuring devices in the soil body sample at the same time for measuring the pore water pressure and the soil pressure at the corresponding positions relative to the hydraulic head difference, so as to obtain the pore water pressure-time variation curve and the soil pressure-time variation curve. In addition, a flowmeter is arranged on the seeping downstream side of the soil body sample, so as to measure the seepage relative to the different hydraulic head difference; and a soil body vertical displacement measuring device is arranged in the soil body sample, so as to measure the vertical displacement of the soil body, thereby plotting the seepage-hydraulic gradient curve. Therefore, the overall development and progression of the permeable damage on the soil body can be characterized more comprehensively by adopting the test method and the test device provided by the invention.
Description
Technical field
The test unit that the present invention relates to a kind of test method of studying phenomenon of permeable damage on soil body and implement this phenomenon of permeable damage on soil body research method belongs to soil body penetration breaking test method and experimental apparatus field thereof.
Background technology
The seepage failure problem that seepage flow causes mainly contains two big classes: the one, because the effect of seepage force produces the loss of soil body particle or the local soil body and moves, cause soil deformation even unstability; The 2nd, because seepage effect changes water pressure or buoyancy, cause the soil body or works unstability; The former mainly shows as stream soil and piping, and the latter then shows as the whole unstabilitys of structures such as bank slope slip or retaining wall.
Studies show that at present piping is that fine particle progressively moves under the infiltration flow action, so that the process that runs off in the hole that coarse particle forms.Be accompanied by fine grain continuously outflowing, pore water pressure in the piping generation evolution in the soil body, soil pressure, land movement and ooze out flow and all change taking place, therefore, the movement of particles by observation soil body sample each several part and the situation of change of each parameter can be understood the generation and the evolution of piping better, but, in the prior art, the method of critical hydraulic gradient was studied the generation and the development of piping when general employing measured the piping generation, and as noted earlier, failure by piping generally has individual time evolution, be a kind of destruction of progressive character, be that piping is a dynamic process, in the evolution of piping, along with the loss of fine particle, the soil body will present heterogeneous body, character such as anisotropy, simultaneously, flow velocity in the soil body and pore water pressure also can redistribute, therefore, use traditional piping test method of measuring critical hydraulic gradient, can not survey the variation of all parameters that relate in the piping evolution all sidedly.
In addition, known indoor piping experimental observation instrument is generally narrow shape groove at present, size is less, and general observational record data with the naked eye, so, this testing equipment obviously has the following disadvantages: the generation evolution of (1) piping is three-dimensional, and the piping process intended by narrow shape channel mould and actual conditions are come in and gone out very big; (2) laboratory experiment of piping is subjected to the influence of size effect very big, and size is more little, and size effect is obvious more, and the error that causes is also big more; (3) most this type of experimental apparatus can not be measured the vertical displacement under the different vertical load in the piping evolution at present, and the parameter kind that energy measurement obtains in the experiment is also less, is difficult to measure all sidedly the hydraulic parameters of the interior each several part of the soil body in the piping generation evolution and the variation of structural parameters; (4) data are utilized the method for manual record, and precision is not high.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of test method of studying phenomenon of permeable damage on soil body is provided, it is by being provided with a plurality of detection probes to measure hydraulic parameters and the structural parameters of different loci under different head difference in the soil body sample respectively: soil body vertical displacement, pore water pressure, soil pressure and ooze out flow, hydraulic gradient-the time of a plurality of site in the sample soil body will be obtained then behind these data collection analysises, pore water pressure-time, soil pressure-time and ooze out four change curves of flow-hydraulic gradient, thus can characterize the generation evolution of whole phenomenon of permeable damage on soil body comparatively all sidedly.
According to above technical purpose, the present invention will take following technical scheme:
A kind of test method of studying phenomenon of permeable damage on soil body, may further comprise the steps: the default of preparation and hydraulic gradient places soil body sample in the soil body storage case before (1) test, and this soil body sample applied can make its head difference that phenomenon of permeable damage takes place, to obtain phenomenon of permeable damage required hydraulic gradient takes place by changing aforementioned head difference; (2) selection of phenomenon of permeable damage characterization parameter is with soil body vertical displacement, pore water pressure, soil pressure and ooze out the characterization parameter that these parameters of flow are chosen to be this experimental study phenomenon of permeable damage; (3) the different loci place that is determined in the soil body sample of phenomenon of permeable damage characterization parameter is provided with water pressure measuring device and soil pressure measurement mechanism to measure the pore water pressure and the soil pressure of the corresponding site of each head difference correspondence in (1) step respectively, use the vertical displacement measurement mechanism in addition and measure soil body vertical displacement, simultaneously, in the downstream that soil body storage case oozes out current flowmeter is set and oozes out flow with mensuration; (4) making of the record of characterization parameter, analysis and change curve record (1), the measured data of (3) step, and it is carried out data analysis, then make pore water pressure-time, the soil pressure-time of hydraulic gradient-time and each corresponding site respectively and ooze out four change curves of flow-hydraulic gradient, thereby the generation evolution of phenomenon of permeable damage is characterized.
Before carrying out (3) step, also need to use the longitudinal load output unit soil body sample is applied longitudinal load, adopt the loading measurement mechanism to measure this longitudinal load simultaneously.
Soil body storage case water delivering orifice head is constant by keeping, classification improves soil body storage case water inlet head for this test method, applies different hydraulic gradients to give soil body sample.
Described water pressure measuring device, soil pressure measurement mechanism, loading measurement mechanism and vertical displacement measurement mechanism are respectively water pressure sensor, soil pressure sensor, vertical displacement sensor and load sensor, the maintenance data harvester writes down vertical displacement, pore water pressure, soil pressure automatically and oozes out flow simultaneously, then these data input computer data processing units are analyzed, exported hydraulic gradient-time, pore water pressure-time, soil pressure-time then respectively and ooze out four change curves of flow-hydraulic gradient.
This test method also comprises the movement locus of analysing particulates, it adopts image collecting device to take the distribution situation of particle, the loss of particle in the continuous recording phenomenon of permeable damage generation evolution, then analyze by data collector input computer data processing unit, in conjunction with hydraulic gradient-time, pore water pressure-time, soil pressure-time and ooze out four change curves of flow-hydraulic gradient, microcosmic Simulation is carried out in phenomenon of permeable damage generation evolution then.
According to above technical scheme, can realize following beneficial effect:
1. the test method of phenomenon of permeable damage on soil body provided by the present invention, the detection probe is set to feed back the vertical displacement of corresponding site respectively by different loci place in the sample soil body, pore water pressure, soil pressure and ooze out these hydraulic parameters of flow or structural parameters, obtain hydraulic gradient by changing head difference, and with these data preparations analyses, to obtain hydraulic gradient-time and corresponding site pore water pressure-time, soil pressure-time and ooze out four change curves of flow-hydraulic gradient, thus can characterize this phenomenon of permeable damage on soil body comparatively all sidedly;
2. the present invention applies different longitudinal loads by the longitudinal load output unit to soil body sample, the loading measurement mechanism is set simultaneously to measure this longitudinal load, thereby can be at different normal loads, obtain hydraulic gradient-time and corresponding site pore water pressure-time, the soil pressure-time in the soil body sample phenomenon of permeable damage generation evolution and ooze out four change curves of flow-hydraulic gradient, guarantee that testing program of the present invention can be applied to the phenomenon of permeable damage on soil body research under the different vertical load.
3. test method provided by the present invention is also by adopting image collecting device to take the motion process of soil body particle in the whole phenomenon of permeable damage on soil body generation evolution, with its input computing machine, pass through specific program, analyze the movement locus of soil body particle, in conjunction with corresponding hydraulic gradient-time and corresponding site pore water pressure-time, soil pressure-time and ooze out four change curves of flow-hydraulic gradient, can in computing machine, simulate whole phenomenon of permeable damage on soil body generation evolution comparatively truly then.
4. all data of the present invention's mensuration are all gathered automatically by data collector, therefore, can receive exactly and survey probe institute feedback data, avoided the generation of the low situation of the precision that manual record caused in the prior art, promptly guaranteed that from data source header the present invention can simulate whole phenomenon of permeable damage on soil body generation evolution truly.
Another goal of the invention of the present invention provides a kind of test unit that can implement above-mentioned test method, it comprises the upstream water storage tank, be used to hold the soil body storage case and the downstream water storage tank of soil body sample, connect on the water storage tank of described upstream and drive the driving control device that perpendicular displacement takes place for it, be connected with inlet water tank between described upstream water storage tank and the soil body storage case, and this inlet water tank is provided with the head inditron that is used to measure head difference between upstream water storage tank and the inlet water tank, then be provided for measuring the flowmeter that oozes out flow between soil body storage case and the downstream water storage tank, the removable cover that the setting of described soil body storage case top board can vertically move, and the vertical displacement measurement mechanism that is used to measure the vertical displacement of soil body sample is installed on this removable cover, in addition, described soil body storage case inside surface is equipped with and is respectively applied for the water pressure measuring device of measuring phenomenon of permeable damage evolution mesoporosity water pressure and the soil pressure measurement mechanism that is used to measure soil pressure.
The output terminal of described removable cover upper surface and longitudinal load output unit is connected, and is provided for measuring the loading measurement mechanism of this longitudinal load vertical load that output unit is exported between the output terminal of longitudinal load output unit and the removable cover
Described loading measurement mechanism, water pressure measuring device and soil pressure measurement mechanism are respectively load sensor, water pressure sensor and soil pressure sensor.
A side panel of described soil body storage case adopts transparent material to be made, and on the outside surface of this transparent panel image collecting device is set, and described image collecting device comprises high speed microimaging head.
Described water pressure sensing is clamored, the output terminal of soil pressure sensor and load sensor, high speed microimaging head is connected with data collector, and the output terminal of this data collector then is connected with computer data processing unit.
According to above technical scheme as can be known, test unit provided by the present invention has following beneficial effect:
1. this test unit is provided with soil body storage case with splendid attire soil body sample, thereby reduced the size effect because of adopting narrow shape groove research experiment to produce in the prior art to a certain extent, in addition, the removable cover of length travel can take place in this test unit in the top board setting of soil body storage case, and this removable cover and longitudinal load output unit are connected, described removable cover is provided with the vertical displacement measurement mechanism simultaneously, then this test unit can provide soil body sample in the phenomenon of permeable damage evolution to be subjected to vertical displacement under the different vertical load, have again, this test unit is provided with water pressure measuring device and soil pressure measurement mechanism on soil body storage case, and be provided with driving control device to change the head difference between upstream water storage tank and the inlet water tank, thereby can obtain soil body pore water pressure and soil pressure under default hydraulic gradient and each head difference, therefore, after the above-mentioned data that collect are carried out analyzing and processing, can draw out hydraulic gradient-time and corresponding site pore water pressure-time, soil pressure-time and the waterpower or the structural parameters change curves that ooze out the evolution of four signs of flow-hydraulic gradient phenomenon of permeable damage, the critical gradient that can only obtain the phenomenon of permeable damage evolution with prior art is compared, adopt this test unit to carry out the experimental study of phenomenon of permeable damage evolution, can simulate whole phenomenon of permeable damage evolution comparatively all sidedly.
2. this test unit adopts image collecting device to take soil body sample particle trajectories, thereby can obtain the movement locus of soil body sample particle, with hydraulic gradient-time, pore water pressure-time, soil pressure-time and ooze out four of flow-hydraulic gradients and characterize curve and verify the whole phenomenon of permeable damage evolution of ground comprehensive simulated mutually.
3. used loading measurement mechanism, water pressure measuring device, vertical displacement measurement mechanism and the soil pressure measurement mechanism of this test unit is respectively load sensor, water pressure sensor, vertical displacement sensor and soil pressure sensor, and adopt data collector to collect the aforementioned means institute data of mensuration respectively automatically, therefore, compare with manual record in the prior art, this test unit is not only saved human cost largely, and guaranteed the record accuracy of data, avoid wrong generation from data source header, improved the precision that data obtain.
4. this test unit adopts the computer data process software that collected data are carried out analyzing and processing, saves human resources on the one hand, the mistake of avoiding the manual analysis processing procedure to take place on the other hand.
Description of drawings
Fig. 1 is the process flow diagram of test method of the present invention;
Fig. 2 is the structural representation of test unit of the present invention;
Fig. 3 is the hydraulic gradient-time changing curve figure in the operational process of the present invention;
Fig. 4 is the pore water pressure-time changing curve figure in the operational process of the present invention;
Fig. 5 is the soil pressure-time changing curve figure in the operational process of the present invention;
Fig. 6 is the change curve that oozes out flow-hydraulic gradient in the operational process of the present invention.
Embodiment
Explain technical scheme of the present invention below with reference to accompanying drawing.
As shown in Figure 1, the test method of studying phenomenon of permeable damage on soil body of the present invention, mainly be the research that is applied to piping phenomenon generation evolution, its main step comprises: the default of preparation and hydraulic gradient places soil body sample in the soil body storage case before (1) test, and this soil body sample applied the head difference that can make its generator tube emerge in large numbers elephant, to obtain the piping phenomenon the required hydraulic gradient of development takes place by changing aforementioned head difference; The selection of (2) piping phenomenon characterization parameter is with soil body vertical displacement, pore water pressure, soil pressure and ooze out the characterization parameter that these parameters of flow are chosen to be this experimental study piping phenomenon; (3) mensuration of piping characterization parameter applies longitudinal load to soil body sample, use the loading measurement mechanism to measure this longitudinal load, use the vertical displacement measurement mechanism simultaneously and measure soil body vertical displacement under the different vertical load, the different loci place is provided with water pressure measuring device, soil pressure measurement mechanism to measure the pore water pressure and the soil pressure of the corresponding site of each head difference correspondence in (1) step respectively in soil body sample in addition, simultaneously, in the downstream that soil body storage case oozes out current flowmeter is set and oozes out flow with mensuration; (4) making of the record of characterization parameter, analysis and change curve record (1), the measured data of (3) step, and it is carried out data analysis, then pore water pressure-time, the soil pressure-time of corresponding site and ooze out four change curves of flow-hydraulic gradient in hydraulic gradient-time and the soil body sample respectively, thus the generation evolution of piping is characterized.
As shown in Figure 2, test unit of the present invention, comprise upstream water storage tank 13, be used to hold the soil body storage case 1 and the downstream water storage tank 11 of soil body sample, the input end of described upstream water storage tank 13 connects the driving control device that drives its generation perpendicular displacement, described driving control device comprises windlass 31 and the hoisting gear that windlass 31 is connected with upstream water storage tank 13, and this hoisting gear is by a plurality of fixed pulleys 33 and cable wire that fixed pulley 33 is connected with windlass 31, upstream water storage tank 13 respectively; Be connected with inlet water tank 2 between described upstream water storage tank 13 and the soil body storage case 1, and this inlet water tank 2 is provided with the head inditron 5 that is used to measure head difference between upstream water storage tank 13 and the inlet water tank 2, then be provided for measuring the flowmeter 12 that oozes out flow between soil body storage case 1 and the downstream water storage tank 11, the range of this flowmeter 12 is 10L/min～40L/min, precision is not less than 0.1L/min, the removable cover 8 that described soil body storage case 1 top board setting can vertically move, and interlock is provided with the longitudinal load output unit on this removable cover 8, the Pressure Actuated Device that described longitudinal load output unit comprises lifting jack 7 and drives these lifting jack 7 motions, and the output terminal of longitudinal load output unit is provided for measuring the loading measurement mechanism 6 of this longitudinal load vertical load that output unit is exported, then be provided for measuring the vertical displacement measurement mechanism (not drawing among the figure) of soil body sample vertical displacement on the removable cover 8, in addition, be equipped with on described soil body storage case 1 internal face and be respectively applied for the water pressure measuring device of measuring piping evolution mesoporosity water pressure and the soil pressure measurement mechanism that is used to measure soil pressure, and the front plate of this soil body storage case 1 adopts transparent material, form as organic glass, be used to observe the motion conditions of soil body sample, and image collecting device is set at this front plate outside surface, the distribution situation of constantly taking particle, the loss process of particle in the continuous recording piping process, gather the movement locus of soil body particle, realize the microcosmic Simulation of piping evolution.
Described loading measurement mechanism 6, water pressure measuring device, vertical displacement measurement mechanism and soil pressure measurement mechanism are respectively load sensor, water pressure sensor, vertical displacement sensor and soil pressure sensor, the used water pressure sensor range of the present invention is 30KPa～50KPa, precision is not less than 0.2KPa, the soil pressure sensor range is 50KPa～70KPa, precision is not less than 0.5KPa, and described image collecting device comprises high speed microimaging head, this high speed microimaging head possesses following parameter: take resolution and be not less than 500 lines, 1/3 inch CCD camera lens, minimal illumination is not more than 0.5LUX, shooting speed is greater than 100 frame/seconds, and has macro function; And the data output end of aforementioned load sensor, water pressure sensor, vertical displacement sensor, soil pressure sensor and high speed microimaging head is connected with data collector 10, and the output terminal of this data collector 10 is then with an analyzing and processing head difference, water pressure, soil pressure, longitudinal load, vertical displacement and these data of soil body sample particle trajectories, be connected with output hydraulic gradient-time, pore water pressure-time, soil pressure-time and the computer data processing unit that oozes out four change curves of flow-hydraulic gradient.
In addition, the present invention also comprises water circle device, this water circle device comprises the ebullator 42 that is arranged in the downstream water storage tank 11, and the output terminal of ebullator 42 is connected with upstream water storage tank 13 usefulness telescopic water pipes 5, when then upstream water storage tank 13 moves up and down along with driving control device, this telescopic water pipe 5 acts accordingly thereupon, guarantees that ebullator 42 can pump into the water in the downstream water storage tank 11 in the upstream water storage tank 13, realizes the circulation of current.
During use, soil body sample is packed into behind the sample storage case 1, removable cover 8 on the top cover, the reaction frame that will have lifting jack 7 and load sensor is adjusted to the position that is fit to loading, and it is fixing to regulate bolt 14 with frame, for preventing the lateral deformation of sample storage case 1, sample storage case 1 is held out against with puller bolt 15; 7 pairs of soil body samples of lifting jack apply certain vertical load then, start windlass 31 and regulate the height of upstream water storage tank 13, head height by head inditron 5 observation inlet water tanks 2, ooze out flow by flowmeter 12 observations, when upstream water storage tank 13 decline of water tables, start water circulating pump with the water suction upstream water storage tank 13 in the downstream water storage tank 11, realize recycling of water; The data that sensor records are carried out analyzing and processing by data collector 10 input computer data APUs 9, export hydraulic gradient-time, pore water pressure-time, soil pressure-time and ooze out four change curves of flow-hydraulic gradient.
In addition, will contrast Fig. 3-5 below, illustrate that using the present invention's research once simulates piping generation evolution.
As Fig. 3, it simulates the hydraulic gradient-time changing curve figure of piping generation evolution for the present invention, its each head difference all be at certain time intervals in, by controlling and driving control device generation perpendicular displacement, thereby make the perpendicular displacement of upstream water storage tank change, changed the head of inlet water tank, promptly changed the head difference between inlet water tank and the downstream water storage tank, obtain the required hydraulic gradient of piping generation evolution, the present invention imposes on the head difference of soil body sample with increase by the head that progressively improves inlet water tank.
As Fig. 4, it simulates the pore water pressure-time changing curve figure of piping generation evolution for using the present invention, as seen from the figure, the water pressure at water pressure sensor experiments of measuring sample diverse location place, at synchronization, the water pressure at diverse location place is variant, and along with the increase of pressurization head, the water pressure sensor numerical value in each site is also increasing.
As Fig. 5, it simulates the soil pressure-time changing curve figure of piping generation evolution for using the present invention, according to principle of effective stress, when the suffered total stress of the soil body is constant, the effective stress of the soil body reduces along with the increase of pore water pressure, among Fig. 4, the counting of soil pressure sensor reduces along with the increase of upstream head and pore water pressure, has verified principle of effective stress.
As Fig. 6, it simulates the change curve that oozes out flow-hydraulic gradient of piping generation evolution for using the present invention, as seen from the figure, in hydraulic gradient hour, the proportional basically example of flow and hydraulic gradient concerns, when hydraulic gradient reaches about 0.5 the time, flow sharply increases, and illustrates that the perviousness of soil body this moment sharply becomes big, that is to say, fine grained in the soil body is taken out of the generation of piping just this moment in a large number.
Claims (10)
1. the test method of a studying phenomenon of permeable damage on soil body is characterized in that:
(1) the default of preparation and hydraulic gradient places soil body sample in the soil body storage case before the test, and this soil body sample applied can make its head difference that phenomenon of permeable damage takes place, to obtain phenomenon of permeable damage required hydraulic gradient takes place by changing aforementioned head difference;
(2) selection of phenomenon of permeable damage characterization parameter is with soil body vertical displacement, pore water pressure, soil pressure and ooze out the characterization parameter that these parameters of flow are chosen to be this experimental study phenomenon of permeable damage;
(3) the different loci place that is determined in the soil body sample of phenomenon of permeable damage characterization parameter is provided with water pressure measuring device and soil pressure measurement mechanism to measure the pore water pressure and the soil pressure of the corresponding site of each head difference correspondence in (1) step respectively, use the vertical displacement measurement mechanism in addition and measure soil body vertical displacement, simultaneously, in the downstream that soil body storage case oozes out current flowmeter is set and oozes out flow with mensuration;
(4) making of the record of characterization parameter, analysis and change curve record (1), the measured data of (3) step, and it is carried out data analysis, then make pore water pressure time, the soil pressure-time of hydraulic gradient-time and each corresponding site respectively and ooze out four change curves of flow-hydraulic gradient, thereby the generation evolution of phenomenon of permeable damage is characterized.
2. according to the described test method of claim 1, it is characterized in that: before carrying out (3) step, also need soil body sample is applied longitudinal load, adopt the loading measurement mechanism to measure this longitudinal load simultaneously.
3. according to the described test method of claim 2, it is characterized in that: soil body storage case water delivering orifice head is constant by keeping, classification improves soil body storage case water inlet head for (1) step in this test method, applies different hydraulic gradients to give soil body sample.
4. according to the described test method of claim 2, it is characterized in that: described water pressure measuring device, the soil pressure measurement mechanism, loading measurement mechanism and vertical displacement measurement mechanism are respectively water pressure sensor, soil pressure sensor, vertical displacement sensor and load sensor, the maintenance data harvester writes down vertical displacement automatically simultaneously, pore water pressure, soil pressure and ooze out flow, then these data input computer data processing units are analyzed, made the pore water pressure-time of hydraulic gradient-time and each corresponding site then respectively, soil pressure-time and ooze out four change curves of flow-hydraulic gradient.
5. according to the described test method of claim 4, it is characterized in that: this test method also comprises the movement locus of analysing particulates, it adopts image collecting device to take the distribution situation of particle, the loss of particle in the continuous recording phenomenon of permeable damage generation evolution, then analyze by data collector input computer data processing unit, in conjunction with hydraulic gradient-time, pore water pressure-time, soil pressure-time and ooze out four change curves of flow-hydraulic gradient, microcosmic Simulation is carried out in phenomenon of permeable damage generation evolution then.
6. test unit of studying phenomenon of permeable damage, it is characterized in that: comprise the upstream water storage tank, be used to hold the soil body storage case and the downstream water storage tank of soil body sample, connect on the water storage tank of described upstream and drive the driving control device that perpendicular displacement takes place for it, be connected with inlet water tank between described upstream water storage tank and the soil body storage case, and this inlet water tank is provided with the head inditron that is used to measure head difference between upstream water storage tank and the inlet water tank, then be provided for measuring the flowmeter that oozes out flow between soil body storage case and the downstream water storage tank, the removable cover that the setting of described soil body storage case top board can vertically move, and the vertical displacement measurement mechanism that is used to measure the vertical displacement of soil body sample is installed on this removable cover, in addition, described soil body storage case inside surface is equipped with and is respectively applied for the water pressure measuring device of measuring phenomenon of permeable damage evolution mesoporosity water pressure and the soil pressure measurement mechanism that is used to measure soil pressure.
7. according to the described test unit of claim 6, it is characterized in that: the output terminal of described removable cover upper surface and longitudinal load output unit is connected, and is provided for measuring the loading measurement mechanism of this longitudinal load vertical load that output unit is exported between the output terminal of longitudinal load output unit and the removable cover.
8. according to the described test unit of claim 7, it is characterized in that: described loading measurement mechanism, water pressure measuring device and soil pressure measurement mechanism are respectively load sensor, water pressure sensor and soil pressure sensor.
9. described according to Claim 8 test unit, it is characterized in that: a side panel of described soil body storage case adopts transparent material to be made, and on the outside surface of this transparent panel image collecting device is set, described image collecting device comprises high speed microimaging head.
10. according to the described test unit of claim 10, it is characterized in that: described water pressure sensing is clamored, the output terminal of soil pressure sensor and load sensor, high speed microimaging head is connected with data collector, and the output terminal of this data collector then is connected with computer data processing unit.
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| CN1512162A (en) * | 2002-12-31 | 2004-07-14 | 湖北省建筑科学研究设计院 | Method for detecting concrete permeability by solution air pressure method |
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| CN101319981B (en) * | 2008-07-23 | 2010-11-03 | 中交第一公路工程局有限公司 | Measurement device for concrete permeability under load action |
| CN201378166Y (en) * | 2009-04-02 | 2010-01-06 | 河海大学 | Test device for studying permeable destruction phenomenon |
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- 2009-04-02 CN CN 200910026153 patent/CN101514978B/en not_active Expired - Fee Related
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| CN103424536A (en) * | 2013-08-01 | 2013-12-04 | 河海大学 | Seepage failure testing device and method for seam pipeline between pipe bags and dam bags |
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| CN104141294A (en) * | 2014-07-24 | 2014-11-12 | 中国电建集团华东勘测设计研究院有限公司 | Judgment method for soil body seepage failure caused by foundation pit supporting water stopping body defect |
| CN104141294B (en) * | 2014-07-24 | 2016-05-04 | 中国电建集团华东勘测设计研究院有限公司 | Pattern foundation pit supporting structure sealing system defect causes the determination methods that soil body penetration destroys |
| CN107703035A (en) * | 2016-06-24 | 2018-02-16 | 中国水利水电科学研究院 | Fisstured flow test instrument under a kind of high water head high stress |
| CN107703035B (en) * | 2016-06-24 | 2020-05-05 | 中国水利水电科学研究院 | Crack seepage tester under high water head-high stress action |
| CN106226201A (en) * | 2016-09-14 | 2016-12-14 | 重庆交通大学 | A kind of device testing seepage failure rule under the conditions of varied angle and test method |
| CN109147541A (en) * | 2018-10-25 | 2019-01-04 | 郑州大学 | Soil body penetration crash simulation device and application method |
| CN110441211A (en) * | 2019-08-22 | 2019-11-12 | 中国电建集团华东勘测设计研究院有限公司 | One-way flow in-situ test determines the experimental rig and method of disturbed belt seepage failure hydraulic slope |
| CN114965211A (en) * | 2022-05-17 | 2022-08-30 | 中国水利水电科学研究院 | Device and method for measuring horizontal progressive infiltration destruction process of soil and stone materials |
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