CN104897549A - Device for pinhole seepage deformation test - Google Patents
Device for pinhole seepage deformation test Download PDFInfo
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- CN104897549A CN104897549A CN201510333288.9A CN201510333288A CN104897549A CN 104897549 A CN104897549 A CN 104897549A CN 201510333288 A CN201510333288 A CN 201510333288A CN 104897549 A CN104897549 A CN 104897549A
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Abstract
The invention discloses a device for a pinhole seepage deformation test. The device comprises a seepage deformation device, wherein the seepage deformation device comprises a first cover, a second cover and a cutting ring for sampling and sample preparation, a prepared sample is contained in the cutting ring, the cutting ring containing the prepared sample is directly arranged in space formed by a first cavity of the first cover and a second cavity of the second cover, so that a filling procedure is omitted, and the leakage phenomenon which can occur when Vaseline is adopted for lubrication during filling in the prior art is also avoided; besides, the opening diameter of the second cavity in the second cover is larger than that of a third cavity, the bottom of one end of the cutting edge of the cutting ring containing the sample is arranged at the part where the second cavity in the second cover is connected with the third cavity, accordingly, the wall flow phenomenon of a water flow is effectively avoided, the water flow passes through a pinhole in the sample directly and flows out of a water outlet pipe as far as possible, the failure time of the sample is delayed, and the reliability of test data is improved.
Description
Technical field
The present invention relates to a kind of impermeabilisation deformation testing device, be specifically related to a kind of device for pin hole seepage deformation test.
Background technology
Pin hole seepage deformation test is used for test in karst collapse test and has fissure-plane or the impermeabilisation deformation failure ability compared with the macropore soil body.In existing process of the test, usually adopt cutting undisturbed soil sample to reach standard and load, and smear vaseline at proving installation inwall and carry out lubricating and antiseepage.Its weak point is: procedure complexity is loaded in sampling cutting, and employing vaseline carries out precision and the reliability that lubrication antiseepage is difficult to prevent seepage completely and then affect test figure.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of device for pin hole seepage deformation test, and this apparatus structure is simple, and easy to operate, test findings is more reliable.
Device for pin hole seepage deformation test of the present invention, comprises seepage deformation device, and this seepage deformation device comprises the cutting ring of the first lid, the second lid and sampling and sample preparation, wherein:
Described first lid has one by its surface to recessed the first chamber of the first lid portion inside, and the shape of this first chamber and the profile of cutting ring match, and the first lid are also provided with and the water inlet pipe of this first chamber and gas outlet;
One is offered on the surface to recessed the second chamber of the second lid portion inside and the 3rd chamber with this second chamber in one of them of the second lid, the described shape of the second chamber and the profile of cutting ring match, the central axes of described second chamber and the 3rd chamber, and the bore of the second chamber is greater than the bore of the 3rd chamber; In the 3rd chamber, be filled with the second filter medium, the second lid is also provided with the rising pipe with described 3rd chamber;
Described first lid and the second lid are that the mode that on the opening of the first chamber on the first lid and the second lid, the opening of the second chamber is just right is arranged, and are removably linked together by web member;
Described cutting ring is placed in the space be made up of the first chamber of the first lid and the second chamber of the second lid, and the bottom of cutting ring upper knife edge one end is placed in the connecting portion of the second chamber and the 3rd chamber on the second lid, cutting ring is filled with the first filter medium away between the bottom of one end to the first chamber of blade, between the periphery wall of cutting ring and the internal perisporium of the internal perisporium of the first chamber and the second chamber, is provided with seal; Now, the central axis of the central axis of the central axis of the central axis of water inlet pipe, the first chamber, the second chamber, the 3rd chamber, the central axis of cutting ring and the central axes of rising pipe on the first lid.
In upper technical scheme, in order to the position of fixing seals, improve sealing effectiveness further, at least one annular groove can also be offered on the internal perisporium of the first chamber, the internal perisporium of the second chamber is offered at least one annular groove, seal is placed in described annular groove.The quantity of described seal is suitable with the quantity of annular groove.Preferably on the internal perisporium of the first chamber and the internal perisporium of the second chamber, offer two road annular grooves respectively.
In technique scheme, described seal can be seal conventional in prior art, is generally O-ring seals.
In technique scheme, the first described filter medium is gravel.
In technique scheme, the second described filter medium is the ringwise permeable stone of shape, and the external diameter of this permeable stone and the bore of the 3rd chamber match, and its internal diameter is equal to or slightly greater than the bore of rising pipe; When this permeable stone is placed in the 3rd chamber, the central axes of its axis and rising pipe.
In technique scheme, described web member is same as the prior art, is preferably bolt, nut.
In technique scheme, gas outlet is also provided with stop valve.
In technique scheme, the structure of described cutting ring is same as the prior art, in this application it for sampling and sample preparation, adopt cutting ring carry out sampling sample preparation, concrete sampling and method for making sample same as the prior art.Be combined with traditional soil test, can the parameter such as volume, density, quality of joint test soil sample, realize the repeatedly utilization of a sample; Also can carry out the pin hole seepage deformation test of different size and thickness specification.And had inside the cutting ring of the sample made directly to be placed in the space be made up of the first chamber of the first lid and the second chamber of the second lid, decrease filling operation, improve efficiency.In order to control the thickness carrying out the sample tested more accurately, on the periphery wall of cutting ring, be preferably labeled with the graduation apparatus representing distance.
Device for pin hole seepage deformation test of the present invention, also comprises and supplying water and the head pressure control system controlling water pressure and the water container of water flowed out by rising pipe for access to seepage deformation device.Wherein, described head pressure control system can be same as the prior art, if publication number is the constant head mass-flow seepage deformation water pressure automatic control device etc. as described in the patent of invention of CN103345278A, the head pressure control system of the following structure of preferred employing: the feed pipe that head pressure control system comprises water-storing device and supplies water to seepage deformation device, wherein: described feed pipe comprises a vibration means for main pipe for supplying water and a water supply arm be communicated with this vibration means for main pipe for supplying water, one end of described vibration means for main pipe for supplying water is communicated with water-storing device, the other end is communicated with water supply arm, vibration means for main pipe for supplying water is also provided with a drainpipe be communicated with it, one end that described water supply arm is not connected with vibration means for main pipe for supplying water is then communicated with the water inlet pipe in seepage deformation device.Described vibration means for main pipe for supplying water is disposed with fixed displacement pump, the first accumulator, flow speed control valve, reduction valve, the second accumulator and tensimeter from water inlet end to its water outlet end direction; Described drainpipe is arranged between the first accumulator and flow speed control valve, and drainpipe is provided with surplus valve.Described water supply arm is disposed with a stop valve and a tensimeter from its inlet end to its water outlet end.Wherein, described fixed displacement pump can be vane pump or peristaltic pump, described water-storing device is generally pond, the water inlet end of described vibration means for main pipe for supplying water stretches into pond (preferably make vibration means for main pipe for supplying water water inlet end be placed in below the liquid level in pond, be more preferably the position be placed in by vibration means for main pipe for supplying water water inlet end close to basin bottom); The water outlet end of described drainpipe stretches in water-storing device.The water container of the above-mentioned water flowed out by seepage deformation device rising pipe for access can be specifically measuring cup or the container with volume scale.
Compared with prior art, feature of the present invention is:
1, cutting ring and penetraction depth by changing dissimilar size sample, and can meet the impermeabilisation deformation test of different size pin hole seepage deformation sample; Also can the parameter such as volume, density, quality of joint test soil sample, realize the repeatedly utilization of a sample.
2, the cutting ring of the sample made is had inside to be directly placed in the space be made up of the first chamber of the first lid and the second chamber of the second lid, not only reduce filling operation, improve efficiency, also avoid in prior art because adopting vaseline to carry out lubricating the Seepage that may occur when loading.
3, in structure of the present invention, the bore of the second chamber on the second lid is arranged to the bore being greater than the 3rd chamber, and the bottom of the blade one end being built-in with the cutting ring of sample is placed in the connecting portion (namely the second chamber is greater than the bottom of the 3rd chamber portion) of the second chamber and the 3rd chamber on the second lid, thus efficiently avoid current and occur wall flow phenomenon, current are made to realize as much as possible directly (supposing that current occur wall flow phenomenon at cutting ring inwall by the pin hole in sample and then from rising pipe outflow, these current also can flow in the 3rd chamber along the connecting portion of the second chamber and the 3rd chamber again, this can extend the circuit of current, also the resistance of current is just increased, and because there is pin hole in sample, current flow through resistance that pin hole flows out from rising pipe again and are significantly less than above-mentioned resistance when there is wall flow phenomenon, therefore, current can be selected to flow to rising pipe (namely flowing through pin hole to flow out from rising pipe again) from the passage that resistance is little), thus ensure that water flows out from the pin hole of sample according to test design, improve the reliability of experimental data.
4, further, to scale be shown at the outer wall of conventional cutting ring, reach the object accurately controlling test soil body sample thickness.
Accompanying drawing explanation
Fig. 1 is the structural representation for the seepage deformation device in the device of pin hole seepage deformation test of the present invention;
Fig. 2 is the structural representation of cutting ring and inner sample thereof in Fig. 1 illustrated embodiment;
Fig. 3 is the structural representation of a kind of embodiment of the device for pin hole seepage deformation test of the present invention;
Fig. 4 is that when by the application of installation of Fig. 3 illustrated embodiment, in river, Guilin, seasonal water-level fluctuation causes riverbank groundwater level fluctuation to cause possibility of subsiding to carry out assessing the pin hole seepage deformation test carried out, sample destroys semilogarithmic plot;
Fig. 5 is the picture after being destroyed by the application of installation of Fig. 3 illustrated embodiment sample when the seasonal water-level fluctuation in river, Guilin causes riverbank groundwater level fluctuation to cause possibility of subsiding to carry out assessing the pin hole seepage deformation test carried out.
Number in the figure is:
1 first lid; 2 water inlet pipes; 3 gas outlets; 4 stop valves; 5 cutting rings; 5-1 graduation apparatus; 6O shape O-ring seal; 7 second lids; 8 second filter mediums; 9 samples; 10 rising pipes; 11 bolts; 12 nuts; 13 first filter mediums; 14 seepage deformation devices; 15 feed pipes; 15-1 vibration means for main pipe for supplying water; 15-2 water supply arm; 16 fixed displacement pumps; 17 first accumulators; 18 flow speed control valves; 19 reduction valve; 20 second accumulators; 21 tensimeters; 22 surplus valves; 23 drainpipes; 24 water-storing devices; 25 water containers.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail, to understand content of the present invention better.
In the embodiment shown in Fig. 1, described seepage deformation device 14 comprises the first lid 1, second lid 7 and cutting ring 5, wherein:
Described first lid 1 has one by its surface to inner the first recessed chamber of the first lid 1, the profile of the shape of this first chamber and size and cutting ring 5 matches, on the internal perisporium of its open at one end, two road annular grooves are offered at the first chamber, first lid 1 is also provided with and the water inlet pipe 2 of this first chamber and gas outlet 3, gas outlet 3 is provided with stop valve 4;
One is offered on the surface to inner the second recessed chamber of the second lid 7 and the 3rd chamber with this second chamber in one of them of the second lid 7, the shape of described second chamber and the profile of size and cutting ring 5 match, and the internal perisporium of the second chamber offers two road annular grooves; The central axes of described second chamber and the 3rd chamber, and the bore of the second chamber is greater than the bore of the 3rd chamber; In the 3rd chamber, be filled with the second filter medium 8, the second lid 7 be provided with the rising pipe 10 with described 3rd chamber, rising pipe 10 be provided with stop valve 4;
Described first lid 1 and the second lid 7 in the first lid 1 on the opening of the second chamber is just right on the opening of the first chamber and the second lid 7 mode arrange, and removably to be linked together by web member;
Described cutting ring 5 is for sampling and sample preparation (after having adopted sample by existing routine techniques, central axis along cutting ring 5 makes a pin hole on sample 9, the axis of described pin hole and the central axes of cutting ring 5), its structure as shown in Figure 2, the periphery wall of cutting ring 5 is labeled with the graduation apparatus 5-1 representing distance, and graduation apparatus 5-1 indicates along the axial length of cutting ring 5 from blade one end of cutting ring 5.Described cutting ring 5 is placed in the space be made up of the second chamber of the first chamber of the first lid 1 and the second lid 7, and (namely a part for cutting ring 5 is placed in the first chamber, a part is placed in the second chamber), the bottom of described cutting ring 5 upper knife edge one end directly presses on the connecting portion of the second chamber and the 3rd chamber on the second lid 7, cutting ring 5 is filled with the first filter medium 13 away between the bottom (namely relative with the first chamber opening extremely internal face) of one end to the first chamber of blade, 4 seals are provided with between the periphery wall of cutting ring 5 and the internal perisporium of the internal perisporium of the first chamber and the second chamber, these seals are placed in the annular groove on the first chamber and the second chamber internal perisporium respectively, now, the central axes of the central axis of the central axis of the central axis of water inlet pipe 2, the first chamber, the second chamber, the central axis of the 3rd chamber, the central axis of cutting ring 5 and rising pipe 10 on the first lid 1.
In above-mentioned implementer's formula, the first described filter medium 13 is gravel; The second described filter medium 8 is the ringwise permeable stone of shape, the external diameter of this permeable stone and the bore of the 3rd chamber match, its internal diameter is equal to or slightly greater than the bore of rising pipe 10, when this permeable stone is placed in the 3rd chamber, and the central axes of its axis and rising pipe 10; Described web member is bolt 11 and nut 12, and described seal is O-ring seals 6.
Fig. 3 is the structural representation of a kind of embodiment of the device for pin hole seepage deformation test of the present invention.In embodiment described in Fig. 3, the device for pin hole seepage deformation test of the present invention comprises seepage deformation device 14, supplies water and the head pressure control system controlling water pressure and the water container 25 of water flowed out by the rising pipe 10 of seepage deformation device 14 for access to seepage deformation device 14.The structure of seepage deformation device 14 wherein as shown in Figure 1.The feed pipe 15 that described head pressure control system comprises water-storing device 24 and supplies water to seepage deformation device 14, described feed pipe 15 comprises a vibration means for main pipe for supplying water 15-1 and a water supply arm 15-2 be communicated with this vibration means for main pipe for supplying water 15-1, one end of described vibration means for main pipe for supplying water 15-1 is communicated with water-storing device 24, the other end is communicated with water supply arm 15-2, and vibration means for main pipe for supplying water 15-1 is also provided with a drainpipe be communicated with it 23; One end that described water supply arm 15-2 is not connected with vibration means for main pipe for supplying water 15-1 is communicated with the water inlet pipe 2 in seepage deformation device 14.Described vibration means for main pipe for supplying water 15-1 is disposed with fixed displacement pump 16, first accumulator 17, flow speed control valve 18, reduction valve 19, second accumulator 20 and tensimeter 21 from water inlet end to its water outlet end direction; Described drainpipe 23 is arranged between fixed displacement pump 16 and the first accumulator 17, and drainpipe 23 is provided with surplus valve 22.Described water supply arm 15-2 is disposed with a stop valve 4 and a tensimeter 21 from its inlet end to its water outlet end.In the present embodiment, described fixed displacement pump 16 is vane pump, described water-storing device 24 is pond, the water inlet end of described vibration means for main pipe for supplying water 15-1 stretches into pond (preferably make vibration means for main pipe for supplying water 15-1 water inlet end be placed in below the liquid level in pond, be more preferably the position be placed in by vibration means for main pipe for supplying water 15-1 water inlet end close to basin bottom); The water outlet end of described drainpipe 23 stretches in water-storing device 24; Described water container 25 is measuring cup.
During test, first take out cutting ring 5, complete sampling sample preparation (make a pin hole along the central axis of cutting ring 5 after having got sample, the size in aperture experimentally sets); Get the second lid 7 mated with cutting ring 5 size again, the seal of coupling is put into the annular groove compacting on the second lid 7 internal perisporium, the 3rd chamber inner pressure second filter medium 8 being put into the second lid 7 is real, again the blade side pressure of cutting ring 5 is entered in the second lid 7, until blade is pressed on the bottom of the second chamber on the second lid 7; Get the first lid 1 of specification coupling, close vent valve, the first filter medium 13 is packed in the first chamber on the first lid 1 and (is partially filled, is normally filled to the 15mm ~ 20mm place apart from the first chamber opening end), flatten; By the second lid 7 of good for grafting cutting ring 5 integrally, the end away from cutting ring 5 blade one end is inserted in the first chamber on the first lid 1, until this end contacts with the first filter medium 13; Finally by bolt 11, nut 12, protecgulum is connected with bonnet, and appropriateness regulates protecgulum and bonnet end face distance, reaches optimum position.After installing, then the water inlet pipe 2 of seepage deformation device 14 is connected by joint with water supply arm 15-2.After water supply arm 15-2 connects with pin hole seepage deformation device 14, open the stop valve 4 on water supply arm 15-2.
Lock according to test design maximal pressure force value regulation relief valve 22 safe-working pressure value, the required peak flow values of test is calculated according to the quantity of seepage deformation device 14, regulate flow speed control valve 18 obtain the required flow of test and lock, each tensimeter 21 is checked.First need to carry out 24 hours full water to seepage deformation device 14, first reduction valve 19 exit pressure levels is set and (can set according to concrete test, as being adjusted to 0.001Mpa), and the stop valve 4 opened successively on all seepage deformation device 14 place water supply arm 15-2 to be tested, open the stop valve 4 in seepage deformation device 14 on gas outlet 3, and the stop valve 4 of closing on seepage deformation device 14 upper water-out pipe 10, then start fixed displacement pump 16, carry out 24 hours full water.
After 24 hours, close the stop valve 4 on gas outlet 3 in seepage deformation device 14, terminate the full water conservancy project of test to do, then the stop valve 4 on water supply arm 15-2 is closed, open the stop valve 4 (being placed with measuring cup below the water delivering orifice of rising pipe 10) on seepage deformation device 14 rising pipe 10 afterwards again, setup test writing task.
According to test design, reduction valve 19 exit pressure levels is regulated every 20 ~ 30min, each adjustment pressure increases certain numerical value and (specifically can set according to test, as 0.002Mpa etc.), record vibration means for main pipe for supplying water 15-1 respectively, flow value that the force value of water supply arm 15-2, measuring cup record, observe turbidity.Progressively improve the head pressure entering seepage deformation device 14 water inlet pipe 2 according to design, until the measuring cup water body of correspondence becomes muddy, flow becomes suddenly large, causes test to destroy, and closes the stop valve 4 on water supply arm 15-2, completes specimen test.
Device (wherein the aperture of pin hole is 1mm) shown in Fig. 3 embodiment being applied to river, Guilin causes possibility of subsiding to assess because seasonal water-level fluctuation causes riverbank groundwater level to fluctuate, get this region soil sample and carry out pin hole seepage deformation test, sample 9 destroys semilogarithmic plot as shown in Figure 4, visible, when observation seepage flow and head are in when suddenling change, show that the soil body starts large-scale damage, flex point value can locate its critical infiltration energy pressure, be embodied in water body and become muddy, occur that the graininess soil body flows out, aperture in test sample 9 becomes large, as shown in Figure 5.
Claims (8)
1. the device for pin hole seepage deformation test, comprise seepage deformation device (14), it is characterized in that: described seepage deformation device (14) comprises the first lid (1), the second lid (7) and sampling and the cutting ring (5) of sample preparation, wherein:
Described first lid (1) has one by its surface to inner the first recessed chamber of the first lid (1), the profile of the shape of this first chamber and cutting ring (5) matches, and the first lid (1) is also provided with and the water inlet pipe of this first chamber (2) and gas outlet (3);
One is offered on the surface to inner the second recessed chamber of the second lid (7) and the 3rd chamber with this second chamber in one of them of the second lid (7), the shape of described second chamber and the profile of cutting ring (5) match, the central axes of described second chamber and the 3rd chamber, and the bore of the second chamber is greater than the bore of the 3rd chamber; In the 3rd chamber, be filled with the second filter medium (8), the second lid (7) is also provided with the rising pipe (10) with described 3rd chamber;
The mode that the opening of opening in upper first chamber of the first lid (1) of described first lid (1) and the second lid (7) and upper second chamber of the second lid (7) is just right is arranged, and is removably linked together by web member;
Described cutting ring (5) is placed in the space be made up of the second chamber of the first chamber of the first lid (1) and the second lid (7), and the bottom of cutting ring (5) upper knife edge one end is placed in the connecting portion of upper second chamber of the second lid (7) and the 3rd chamber, cutting ring (5) is filled with the first filter medium (13) away between the bottom of one end to the first chamber of blade, between the periphery wall of cutting ring (5) and the internal perisporium of the internal perisporium of the first chamber and the second chamber, is provided with seal; Now, the central axes of the central axis of the central axis of the central axis of the upper water inlet pipe (2) of the first lid (1), the first chamber, the second chamber, the central axis of the 3rd chamber, the central axis of cutting ring (5) and rising pipe (10).
2. device according to claim 1, is characterized in that: on the internal perisporium of the first chamber, offer at least one annular groove, and the internal perisporium of the second chamber offers at least one annular groove, and described seal is placed in described annular groove.
3. device according to claim 1, is characterized in that: described seal is O-ring seals (6).
4. device according to claim 1, is characterized in that: described the first filter medium (13) is gravel.
5. device according to claim 1, it is characterized in that: described the second filter medium (8) is the ringwise permeable stone of shape, the external diameter of this permeable stone and the bore of the 3rd chamber match, and its internal diameter is equal to or slightly greater than the bore of rising pipe (10); When this permeable stone is placed in the 3rd chamber, the central axes of its axis and rising pipe (10).
6. device according to claim 1, is characterized in that: described web member is bolt (11), nut (12).
7. device according to claim 1, is characterized in that: described gas outlet (3) is provided with stop valve (4).
8. the device according to any one of claim 1 ~ 6, is characterized in that: the periphery wall of described cutting ring (5) is labeled with the graduation apparatus (5-1) representing distance.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510333288.9A CN104897549A (en) | 2015-06-16 | 2015-06-16 | Device for pinhole seepage deformation test |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510333288.9A CN104897549A (en) | 2015-06-16 | 2015-06-16 | Device for pinhole seepage deformation test |
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| CN201510333288.9A Pending CN104897549A (en) | 2015-06-16 | 2015-06-16 | Device for pinhole seepage deformation test |
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Application publication date: 20150909 |