CN215297081U - Test device for measuring permeability coefficient of fractured rock mass - Google Patents
Test device for measuring permeability coefficient of fractured rock mass Download PDFInfo
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- CN215297081U CN215297081U CN202121735509.2U CN202121735509U CN215297081U CN 215297081 U CN215297081 U CN 215297081U CN 202121735509 U CN202121735509 U CN 202121735509U CN 215297081 U CN215297081 U CN 215297081U
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Abstract
The utility model discloses a test device for measuring permeability coefficient of fractured rock mass, which comprises a water inlet device, a permeation device and a water outlet device which are communicated along the water flow direction, wherein two ends of the permeation device are respectively detachably connected with the water inlet device and the water outlet device, and a cylindrical space for a fractured rock mass test piece is arranged in the permeation device; the top of the infiltration device is provided with a first piezometric tube; the top of the water outlet device is provided with a second pressure measuring pipe, and the shape and the size of the cylindrical space are matched with those of a standard test piece of a fractured rock mass; the water injection quantity can be strictly controlled through the water inlet device, the water head can be more conveniently and rapidly controlled, and the pressure measuring pipes are arranged at the tops of the water inlet device and the water outlet device, so that the accurate water head difference can be more effectively obtained; the size of the fractured rock mass is the size of a standard test piece, the standard test piece can be contrastively analyzed with the permeability coefficient obtained by other test methods at the later stage, and the three parts of the device can be detached, so that the fractured rock mass test piece can not be disturbed when being placed.
Description
Technical Field
The utility model belongs to the technical field of rock mass mechanics experiments, concretely relates to survey test device of crevice rock mass osmotic coefficient.
Background
Mastering the permeability of rock mass is an important task for refining the description of hydrogeological features of a region. The permeability coefficient is an important index for representing the permeability of the rock mass, and the fractured rock mass can form new fractures under the action of seepage to form a new underground water flow field, so that the fractured rock mass is subjected to integral damage, and a large-scale landslide is generated. Therefore, the test for determining the permeability coefficient of fractured rock mass is particularly important.
At present, a three-axis permeability test is often adopted for a fractured rock mass permeability device, the device can be used for testing the change of the permeability coefficient of the fractured rock mass under the stress-seepage coupling effect, but because a rock mass test piece adopted at the moment is of a small scale, the rock mass test piece is disturbed in the sample preparation process and cannot completely reflect the fracture performance, and in the process of applying confining pressure, the fracture can deform to a certain extent, so that the measured permeability coefficient generates a large error.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a survey test device of crack rock mass osmotic coefficient carries out the survey test of seepage flow performance under the given flood peak condition, saves the process of applying confined pressure, avoids producing great error, the device easy operation.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a test device for measuring the permeability coefficient of a fractured rock mass comprises a water inlet device, a permeation device and a water outlet device which are communicated along the water flow direction, wherein two ends of the permeation device are detachably connected with the water inlet device and the water outlet device respectively, and a cylindrical space for a fractured rock mass test piece is arranged in the permeation device; the top of the infiltration device is provided with a first piezometric tube; and a second piezometer tube is arranged at the top of the water outlet device, and the shape and the size of the cylindrical space are matched with those of a standard test piece of a fractured rock mass.
The water inlet device is provided with a water storage tank, the water outlet device is provided with a water outlet tank, two ends of the permeation device are respectively connected with the water storage tank and the water outlet tank through flanges, a water stop pad is arranged at the joint, and the water storage tank is made of organic glass.
The water inlet device comprises a water injection barrel with scales and a water inlet hose; the water injection cylinder with the scales is connected with the water storage tank through a water inlet hose, the top of the water injection cylinder with the scales is provided with an overflow pipe, and the water inlet hose is provided with a valve.
The infiltration device comprises an infiltration box, the external shape of the infiltration box is a cuboid, and the middle part of the infiltration box is provided with the cylindrical space.
The infiltration box is made of transparent organic glass.
The water outlet of the water outlet device is connected with a water collecting device through a water outlet hose.
The first pressure measuring pipe and the second side pressure pipe are the same.
And a rubber film sheath is arranged between the inner wall of the cylindrical space and the fractured rock mass test piece, and the length of the rubber film sheath is greater than that of the fractured rock mass test piece.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
the water injection quantity can be strictly controlled through the water inlet device, the water head can be more conveniently and rapidly controlled, and the pressure measuring pipes are arranged at the tops of the water inlet device and the water outlet device, so that the accurate water head difference can be more effectively obtained; based on the device provided by the utility model, the dimension of the fractured rock mass is the dimension of a standard test piece, and the permeability coefficient obtained by other test methods can be contrastively analyzed at the later stage, so that a foundation is laid for the future test; the device has the advantages that the three parts are detachable, so that the test is more flexible, and the fractured rock mass test piece cannot be disturbed when being placed; the device for measuring the permeability coefficient of the fractured rock mass has the advantages that the pressure water head is adopted, operations such as confining pressure and the like are not carried out on the fractured rock mass, and the prefabricated fracture in the fractured rock mass cannot deform, so that the influence on the measurement result of the permeability coefficient of the fractured rock mass is reduced, and the device for measuring the permeability coefficient of the fractured rock mass is simple in operation, safe and reliable.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic structural view of the water inlet device of the present invention.
Fig. 3 is a schematic structural view of the water inlet device of the present invention.
Fig. 4 is a schematic structural view of the osmosis device of the present invention.
Fig. 5 is a schematic view of the distribution of the junction of the present invention.
Fig. 6 is a schematic front view of the permeation device.
Fig. 7 is a schematic top view of a permeation device.
Fig. 8 is a schematic left view of the permeation device.
In the attached figure, 1-water inlet device, 11-water injection barrel with scale, 12-water inlet hose, 13-water storage tank, 14-pressure measuring pipe, 15-flange plate, 16-overflow pipe, 17-first bolt hole, 2-penetrating device, 21-penetrating box, 22-water stop pad, 23-connecting flange plate, 24-fractured rock mass, 25-rubber membrane, 26-second bolt hole, 3-water outlet device, 31-pressure measuring pipe, 32-water outlet hose, 33-water collecting device, 34-water outlet box, 35-flange plate and 36-bolt hole.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in figure 1, the utility model aims to improve the complexity of the prior art, provide an indoor test device of survey crack rock mass osmotic coefficient, at first prefabricated rock mass crack carries out the seepage flow performance test under the given flood peak condition again, this set of device easy operation, convenience.
The utility model provides a test device for measuring permeability coefficient of fractured rock mass, which comprises a water inlet device 1, a permeation device 2 and a water outlet device 3 which are communicated along the water flow direction, wherein two ends of the permeation device 2 are respectively detachably connected with the water inlet device 1 and the water outlet device 3, and a cylindrical space for a fractured rock mass test piece 24 is arranged in the permeation device 2; a first piezometer tube 14 is arranged at the top of the infiltration device 2; the top of the water outlet device 3 is provided with a second pressure measuring pipe 31, and the shape and the size of the cylindrical space are matched with those of a standard test piece of a fractured rock mass.
The water inlet device 1 is provided with a water storage tank 13, the water outlet device 3 is provided with a water outlet tank 34, two ends of the penetration device 2 are respectively connected with the water storage tank 13 and the water outlet tank 34 through flanges, the joints are provided with water stop pads 22, and the water storage tank 13 is made of organic glass.
The water inlet device 1 comprises a water injection barrel 11 with scales and a water inlet hose 12; the water injection tube 11 with the scales is connected with the water storage tank 13 through a water inlet hose 12, the top of the water injection tube 11 with the scales is provided with an overflow pipe 16, and the water inlet hose 12 is provided with a valve.
Referring to fig. 1, 2 and 3, the water inlet device 1 comprises a graduated water injection cylinder 11, a water inlet hose 12, a water storage tank 13, a first pressure measuring pipe 14, a flange 15, an overflow pipe 16 and a first bolt hole 17; the water injection barrel 11 is a main device for water inlet and water head control, the water quantity is marked by detailed scale marks on the barrel wall of the water injection barrel, the maximum scale is 17L, and the sub-scale is 200 mL. 11 lower part openings of water injection section of thick bamboo connect into water hose 12, and under the effect of flood peak, water gets into penetrant unit 2, and water injection section of thick bamboo 11 is connected to water hose 12 entry end, and storage water tank 13 is connected to the exit end, under the water pressure effect, forms the infiltration system, takes the scale sign flood peak on the scale water injection section of thick bamboo 11.
The water storage tank 13 is made of organic glass, two truncated cone-shaped elongated holes are arranged above the water storage tank, the water inlet hose 12 is convenient to insert, water firstly passes through the water storage tank 13, and the water enters the penetrating device 2 from the water storage tank 13.
The lower end of the first pressure measuring pipe 14 is communicated with the truncated cone-shaped extension hole and is hooped by a hoop, and the opening at the upper end of the first pressure measuring pipe 14 is communicated with the atmosphere. The first piezometer tube 14 is provided with scales, the maximum scale is 30cm, the sub-scale is 1mm, and the water injection cylinder has a certain height, so that the piezometer tube has a certain water head.
Referring to fig. 2, 6 and 7, the flange 15 is connected with the water storage tank 13 to form a whole, and is provided with a first bolt hole 17, and the flange is tightly connected with a water stop gasket 22 through the bolt hole, so that the sealing performance of the infiltration device is enhanced, and the test result is more reliable; the overflow pipe 16 is opened on the water injection cylinder 11 and is connected with a 7cm long pipe, which enables the water injection cylinder to maintain a certain liquid level, and the outer end of the overflow pipe is opened for rapidly discharging the redundant liquid.
The first bolt hole 17 is used for connecting the water storage tank 13 with the penetrating device 2, and the water inlet device 1 and the water outlet device 3 can be detached and separated through the first bolt hole 17, so that the fractured rock mass test piece 24 can be installed more conveniently and rapidly, and the prefabricated fracture is not disturbed and deformed.
Referring to fig. 4 and 5, the infiltration apparatus 2 includes an infiltration tank 21, a water stop gasket 22, a connection flange 23, a fractured rock mass specimen 24, a rubber membrane 25, and a second bolt hole 26. The infiltration case 21 adopts organic glass to make, and the outside is 100mm rectangle frame, and the inside is drawn the drum that the diameter is 50mm for place fissured rock mass test piece 24. In order to ensure that water does not seep between the fractured rock mass test piece 24 and the cylinder wall, the two ends of the cylinder are extended by 20 m. The two ends are provided with connecting flanges 23, so that the two ends are connected with the water inlet device 1 and the water inlet device 3 at the later stage.
The water stop pad 22 is provided with a second bolt hole 26 which can be connected with the water inlet device 1 and the infiltration device 2, so that the tightness of the infiltration device is improved, and the measuring result is more reliable.
The connecting flange plate 23 is connected with the infiltration tank 21 to form a whole, a second bolt hole 26 is arranged on the connecting flange plate, and the connecting flange plate and the water stop pad 22 are completely anchored through the bolt hole, so that the tightness of the infiltration device is enhanced, and the test result is more reliable.
After prefabricating the fissure of the rock mass, manufacturing a fissure rock mass test piece, wherein the size of the fissure rock mass test piece 24 is
The test piece is a standard test piece for carrying out a triaxial test and the like, and can lay a foundation for a subsequent supplementary test.
The rubber film 25 is used for ensuring that water cannot seep between the fractured rock mass and the cylinder wall, a rubber mold is sleeved outside the fractured rock mass test piece 24, the internal air is pumped out, and then the rubber mold is turned out and fixed to the extending positions of the two ends of the cylinder.
The second bolt hole 26 connects the infiltration tank 21 and the water stop pad 22 with the water inlet device 1, and the tightness in the infiltration process is ensured. And can be disassembled, so that the fractured rock mass test piece 24 can be more conveniently placed.
The water outlet device 3 consists of the following 6 parts: the water-collecting device comprises a second pressure measuring pipe 31, a water outlet hose 32, a water outlet tank 34, a water collecting device 33, a flange 35 and bolt holes 36.
The lower end of the second piezometer tube 31 is communicated with the truncated cone-shaped extension hole and is hooped by a hoop, and the upper end opening is communicated with the atmosphere. The piezometer tube is provided with scales, the maximum scale is 30cm, the sub-scale is 1mm, the air pressure of the water outlet liquid level is different from that of the water inlet liquid level, the liquid level in the piezometer tube is different, and the water head difference can be obtained.
The upper end of the water outlet hose 32 is connected with the infiltration device 2, the lower end of the water outlet hose flows to the water collecting device 33, when water begins to uniformly flow out through the water outlet hose 32, timing can be carried out, and at the moment, water begins to seep in the fractured rock mass test piece 24.
Water in the water collecting device 33 enters the water collecting device 33 through the water outlet hose, the water collecting device is provided with scales, the maximum scale is 3L, the sub-scale is 100mL, and the water quantity which can pass through the fractured rock mass test piece 24 can be known through the data.
The water outlet tank 34 is made of organic glass, two truncated cone-shaped elongated holes are arranged above the water outlet tank, the water outlet hose 32 and the second piezometric tube 31 are conveniently inserted, and water enters the water collecting device 33 after passing through the water outlet tank 34.
The flange 35 is integrally connected with the water outlet tank 34, bolt holes 36 are arranged on the flange, and the flange and the water stop pad 22 are completely anchored through the bolt holes, so that the tightness of the infiltration device is enhanced, and the test result is more reliable. The infiltration box 21 and the water stop pad 22 are connected with the water outlet device 3 through the flange 35, the connecting flange 23 and the connecting bolt, so that the tightness in the infiltration process is ensured. And can be disassembled, so that the fractured rock mass can be more conveniently placed.
The specific use mode is as follows: covering the prefabricated 24-crack rock body with a 25 rubber film, pumping out internal vacuum, placing the rock body in a cylinder in the penetration device 2, turning out the rubber film 25 to the extension position of the cylinder, and tightening by using a clamp to prevent water from flowing out through a gap between the crack rock body and the wall of the cylinder; after the fractured rock mass test piece 24 is installed, the penetration device 2 is connected with the water inlet device 1 and the water outlet device 3 through the first bolt hole 17; placing the water injection barrel 11 at a certain height, injecting a certain amount of water, allowing the water to enter the penetration device 2 through the water storage barrel 13 under the action of a water head, allowing the water to flow out to the water collecting device 34 after passing through a 24-crack rock mass, starting timing when the water collecting device 33 starts dripping water, stopping timing when the water outlet hose 32 does not discharge water, and recording the position of the water head of the first pressure measuring pipe 14, the inflow rate and the outflow rate of the water; and substituting the recorded data into an osmotic coefficient calculation formula to obtain an osmotic coefficient calculation result of the fractured rock mass.
Claims (8)
1. A test device for measuring the permeability coefficient of a fractured rock mass is characterized by comprising a water inlet device (1), a penetration device (2) and a water outlet device (3) which are communicated along the water flow direction, wherein two ends of the penetration device (2) are detachably connected with the water inlet device (1) and the water outlet device (3) respectively, and a cylindrical space for a fractured rock mass test piece (24) is arranged in the penetration device (2); a first pressure measuring pipe (14) is arranged at the top of the infiltration device (2); and a second pressure measuring pipe (31) is arranged at the top of the water outlet device (3), and the shape and the size of the cylindrical space are matched with those of a standard test piece of a fractured rock mass.
2. The test device for determining the permeability coefficient of fractured rock mass according to claim 1, wherein the water inlet device (1) is provided with a water storage tank (13), the water outlet device (3) is provided with a water outlet tank (34), two ends of the permeation device (2) are respectively connected with the water storage tank (13) and the water outlet tank (34) through flanges, the joints are provided with water stop pads (22), and the water storage tank (13) is made of organic glass.
3. The test device for determining the permeability coefficient of fractured rock mass according to claim 2, wherein the water inlet device (1) comprises a water injection cylinder (11) with scales and a water inlet hose (12); the water storage tank (13) is connected with the water injection cylinder (11) with the scales through the water inlet hose (12), the overflow pipe (16) is arranged at the top of the water injection cylinder (11) with the scales, and the valve is arranged on the water inlet hose (12).
4. The test device for determining the permeability coefficient of the fractured rock mass according to claim 1, wherein the permeation device (2) comprises a permeation box (21), the permeation box (21) is rectangular in external shape, and the middle part of the permeation box is provided with the cylindrical space.
5. The test device for determining the permeability coefficient of fractured rock mass according to claim 4, wherein the permeation box (21) is made of transparent organic glass.
6. The test device for determining the permeability coefficient of fractured rock mass according to claim 1, wherein a water outlet of the water outlet device is connected with a water collecting device (33) through a water outlet hose (32).
7. A test device for determining the permeability coefficient of a fractured rock mass according to claim 1, wherein the first pressure pipe (14) and the second pressure pipe (31) are identical.
8. The test device for determining the permeability coefficient of the fractured rock mass according to claim 1, wherein a rubber film jacket (25) is arranged between the inner wall of the cylindrical space and the fractured rock mass test piece (24), and the length of the rubber film jacket (25) is greater than that of the fractured rock mass test piece (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121735509.2U CN215297081U (en) | 2021-07-28 | 2021-07-28 | Test device for measuring permeability coefficient of fractured rock mass |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121735509.2U CN215297081U (en) | 2021-07-28 | 2021-07-28 | Test device for measuring permeability coefficient of fractured rock mass |
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| CN215297081U true CN215297081U (en) | 2021-12-24 |
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| CN202121735509.2U Active CN215297081U (en) | 2021-07-28 | 2021-07-28 | Test device for measuring permeability coefficient of fractured rock mass |
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2021
- 2021-07-28 CN CN202121735509.2U patent/CN215297081U/en active Active
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