CN217879172U - Soil sample expansion and shrinkage test device under load and dry-wet cycle coupling effect - Google Patents
Soil sample expansion and shrinkage test device under load and dry-wet cycle coupling effect Download PDFInfo
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- CN217879172U CN217879172U CN202220346613.0U CN202220346613U CN217879172U CN 217879172 U CN217879172 U CN 217879172U CN 202220346613 U CN202220346613 U CN 202220346613U CN 217879172 U CN217879172 U CN 217879172U
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Abstract
The utility model discloses a load and damp and dry circulation coupling effect lower soil sample swell-shrink test device, including the compression container, the grommet has been placed among the compression container, the cutting ring has been placed in the grommet, place the permeable stone that the diameter is less than its internal diameter on the cutting ring, foraminiferous loading upper cover has been placed on the permeable stone, the guide ring has been cup jointed in the cutting ring and the permeable stone outside, the guide ring top is placed the water guide guard ring that catches on foraminiferous loading upper cover, water guide guard ring top is provided with the loading crossbeam, its bottom supports foraminiferous loading upper cover top center behind the loading crossbeam is passed to the loading screw thread, the loading screw top surface contacts with the measuring head of percentage table, the percentage table bottom is fixed in the compression container through connecting the member. The utility model discloses it is integrative to collect loading device, humidification device and drying device, need not dismantle the sample at the dry-wet cycle in-process, avoids off-load and disturbance sample.
Description
Technical Field
The utility model relates to a load and wet circulation coupling effect soil sample breathing test device down relates to geotechnical engineering technical field.
Background
The Guizhou is rapidly building basic facilities such as industrial and civil buildings, expressways, high-speed railways and the like, inevitably passes through red clay areas, and the mechanical properties of the red clay are degraded under the dry-wet circulation action and the load coupling action no matter the red clay is used as a foundation or a roadbed material, so that the strength and the stability are reduced, the structures are damaged, and the fundamental reason for generating disasters is shown. At present, the understanding of the mechanical properties of red clay under the coupling action of load and dry-wet cycle is insufficient, and the research on the problem is mostly focused on the research on the mechanical properties of the red clay under the action of no-load dry-wet cycle, or the research on the mechanical properties of the red clay is carried out by directly stacking weights on a sample, but the load is inevitably generated when the water content is monitored by using a weighing method, and the test conditions are greatly different from the actual engineering conditions.
The current soil dry-wet cycle test mainly takes an indoor test as a main part, and the test method mainly comprises two types: one method is to use a cutting ring sample as a research object, and the sample is subjected to dry-wet circulation under the no-load effect. And in the dry-wet circulation process, the water content is calculated by a weighing method to control the dry-wet circulation amplitude, and a mechanical property test is carried out after a certain circulation times. The other method is to pile weights on a cutting ring sample to simulate a dry-wet cycle test under the existence of vertical load, and in order to control the dry-wet cycle amplitude, the vertical load (weight) needs to be unloaded when the moisture content is calculated by a weighing method. The two test methods can better control the dry-wet cycle amplitude, but the simulation of the real load of the engineering still has larger deviation because the soil body with a certain depth in the engineering always has the load action and the unloading can not occur in the dry-wet cycle process.
Disclosure of Invention
An object of the utility model is to provide a load and test device that contracts that soil sample expands under wet circulation coupling effect futilely. The soil sample expansion and contraction deformation characteristic test under the coupling action of load and dry-wet cycle can be carried out, the condition which is consistent with the actual working condition is achieved, and the problems in the background art are solved.
The technical scheme of the utility model: the utility model provides a load and soil sample breathing test device under wet and dry cycle coupling effect, including the compression container, place the retaining ring in the compression container, place the cutting ring in the retaining ring, place the permeable stone that the diameter is less than its internal diameter on the cutting ring, placed foraminiferous loading upper cover on the permeable stone, the guide ring has been cup jointed outside cutting ring and the permeable stone, the guide ring top is placed the water guide retaining ring that catches on foraminiferous loading upper cover, water guide retaining ring top is provided with the loading crossbeam, its bottom supported foraminiferous loading upper cover top center behind the loading crossbeam is passed to the loading screw thread, the loading screw top surface contacts with the measuring head of percentage table, the percentage table bottom is fixed in the compression container through connecting the member.
In the soil sample expansion and shrinkage test device under the coupling effect of load and dry-wet cycle, the connecting rod piece comprises a vertical rod in threaded connection with the compression container, the top of the vertical rod is fixedly connected with the dial indicator fixing rod, and the tail end of the dial indicator fixing rod is connected with the dial indicator.
In the soil sample swell-shrink test device under aforementioned load and wet-dry cycle coupling effect, drying device still including setting up the bathroom heater at the percentage table top including cup jointing the rubber heating area on the grommet outer wall, the top at braced frame is fixed to the bathroom heater.
In the soil sample expansion and shrinkage test device under the load and dry-wet cycle coupling effect, the heat insulation film is arranged around the supporting frame.
In the soil sample expansion and contraction test device under the load and dry-wet cycle coupling effect, an organic glass base plate is arranged at the bottom in the guard ring, and the cutting ring is placed on the organic glass base plate.
In the soil sample expansion and contraction test device under the coupling effect of the load and the dry-wet cycle, the lantern ring is placed in the retaining ring, and the cutting ring is placed in the lantern ring.
In the soil sample expansion and shrinkage test device under the coupling effect of load and dry-wet cycle, the upper part and the lower part of the guide ring are respectively connected with the cutting ring and the water guide protective ring in a bonding manner through the waterproof sealing adhesive tape.
In the soil sample expansion and shrinkage test device under the coupling effect of load and dry-wet circulation, a protruding part is arranged in the middle of the top of the loading upper cover with holes, a hemispherical groove is formed in the top surface of the protruding part, the bottom of the loading screw abuts against the hemispherical groove, and holes penetrating through the top and the bottom of the loading upper cover with holes are further arranged on the loading upper cover with holes.
In the soil sample expansion and contraction test device under the coupling action of load and dry-wet cycle, a balance nut is sleeved on the loading screw above the loading cross beam in a threaded manner.
In the soil sample expansion and contraction test device under the load and dry-wet cycle coupling effect, an annular groove is formed in the bottom of the compression container, and the protective ring is clamped in the annular groove.
The utility model has the advantages that: compared with the prior art, the utility model discloses collect loading device, humidification device and drying device an organic whole, do not need to dismantle the sample at the wet cycle in-process futilely, avoid off-load and disturbance sample. And the utility model discloses considered dry and wet circulation range, and only the moisture content of the different initial condition's of survey before the official development test in order to confirm its humidification and drying process required time, this test device easy operation, convenient, easily master, accord with operating condition more, have good popularization and application prospect.
Drawings
FIG. 1 is a side view of the whole device of the present invention;
FIG. 2 is a front view of the inside of the compression container of the present invention;
FIG. 3 is a schematic top view of the loading lid with holes of the present invention;
FIG. 4 is a schematic view of the structure of the combination of the loading upper cover with holes and the water guide retaining ring of the device of the present invention;
FIG. 5 is a schematic view of the waterproof sealing tape of the present invention;
fig. 6 is a schematic view of the heating belt and retaining ring assembly of the device of the present invention.
Reference numerals are as follows: 1-compression container, 2-protective ring, 3-lantern ring, 4-organic glass base plate, 5-cutting ring, 6-guide ring, 7-loading upper cover with hole, 8-loading beam, 9-loading screw, 10-permeable stone, 11-water guide protective ring, 12-rubber heating band, 13-balance nut, 14-dial indicator fixing rod, 15-dial indicator, 16-upright rod, 17-supporting frame, 18-bathroom warmer, 19-heat insulation film, 20-waterproof sealing adhesive tape.
Detailed Description
The present invention will be further described with reference to the drawings and examples, which should not be construed as a limitation to the present invention.
The embodiment of the utility model provides a: a soil sample expansion and shrinkage test device under the coupling effect of load and dry-wet circulation is disclosed, as shown in figures 1-6, and comprises a compression container 1, a protective ring 2 is placed in the compression container 1, a cutting ring 5 is placed in the protective ring 2, a permeable stone 10 with the diameter smaller than the inner diameter of the permeable stone is placed on the cutting ring 5, a loading upper cover 7 with a hole is placed on the permeable stone 10, a guide ring 6 is sleeved outside the cutting ring 5 and the permeable stone 10, a water guide protective ring 11 for sleeving the loading upper cover 7 with the hole is placed at the top of the guide ring 6, a loading cross beam 8 is arranged above the water guide protective ring 11, the bottom end of a loading screw 9 after penetrating through the loading cross beam 8 abuts against the center of the top of the loading upper cover 7 with the hole, the top surface of the loading screw 9 is in contact with a measuring head of a dial indicator 15, and the bottom of the dial indicator 15 is fixed in the compression container 1 through a connecting rod piece.
The connecting rod piece comprises a vertical rod 16 in threaded connection with the compression container 1, the top of the vertical rod 16 is fixedly connected with a dial indicator fixing rod 14, and the tail end of the dial indicator fixing rod 14 is connected with a dial indicator 15. The drying device comprises a rubber heating belt 12 sleeved on the outer wall of the protective ring 2 and a bathroom heater 18 arranged on the top of the dial indicator 15, wherein the bathroom heater 18 is fixed on the top of the supporting frame 17.
And the heat insulation film 19 is arranged around the supporting frame 17, so that the peripheral environment is prevented from being influenced by high temperature generated by the drying device in the test process.
The bottom is provided with organic glass backing plate 4 in the grommet 2, and organic glass backing plate 4 is waterproof material, and cutting ring 5 is placed on organic glass backing plate 4, avoids the direct and 1 bottom contact of compression container of sample to prevent that it influences the sample moisture content in the process of the test.
A lantern ring 3 is placed in the protective ring 2, a cutting ring 5 is placed in the lantern ring 3, and the position of the cutting ring 5 is fixed through the lantern ring 3.
The upper part and the lower part of the guide ring 6 are respectively connected with the cutting ring 5 and the water guide guard ring 11 in an adhesive way through waterproof sealing adhesive tapes 20.
The middle of the top of the loading upper cover with holes 7 is provided with a protruding part, the top surface of the protruding part is provided with a hemispherical groove, the bottom of the loading screw 9 is propped against the hemispherical groove, and holes penetrating through the top and the bottom of the loading upper cover with holes 7 are arranged on the loading upper cover with holes.
And a balance nut 13 is sleeved on the loading screw 9 above the loading cross beam 8 through threads.
The structure is divided into a loading device, a humidifying device and a drying device. The loading device comprises a compression container 1, a protective ring 2, a lantern ring 3, an organic glass base plate 4, a cutting ring 5, a guide ring 6, a loading upper cover 7 with a hole, a loading cross beam 8 and a loading screw 9. The compression container 1 is a hollow cylinder with an open end, the diameter of the protective ring 2 is smaller than that of the compression container 1, the diameter of the lantern ring 3 is smaller than that of the protective ring 2, the lantern ring 3 is placed in the protective ring 2 and used for fixing the position of the cutting ring 5, the diameter of the organic glass base plate 4 is smaller than that of the protective ring 2, the diameter of the cutting ring 5 is slightly smaller than that of the organic glass base plate 4, the inner diameter of the guide ring 6 is consistent with the outer diameter of the cutting ring 5, the thickness of the loading upper cover 7 with the hole is about 8mm, a protruding part is arranged in the center of the top surface and internally provided with a hemispherical groove, a through screw hole is formed in the middle of the loading cross beam 8, through screw holes with smaller diameters are distributed at two ends of the loading cross beam, the through screw holes at the two ends are used for connecting with the supporting rod pieces of the loading cross beam 8, the loading screw rod 9 is T-shaped, and threads are distributed on the whole body.
The humidifying device comprises a permeable stone 10, a loading upper cover 7 with holes and a water guide retaining ring 11, the diameter of the permeable stone 10 is slightly smaller than that of the cutting ring 5, the loading upper cover 7 with holes is covered on the permeable stone, and the water guide retaining ring 11 is made of aluminum sheets and is a hollow cylinder with two open ends. The permeable stone 10, the loading upper cover with holes 7 and the water guide guard ring 11 are connected in sequence from bottom to top to form the humidifying device with controllable upper limit of water content.
Drying device includes rubber heating area 12, braced frame 17, bathroom heater 18 and thermal-insulated membrane 19, and rubber heating area 12 is the cavity cylinder banding, and braced frame 17 material is the alloy, and adjustable height is fixed with bathroom heater 18 at its top, and thermal-insulated membrane 19 material is EPE, fixes it all around braced frame 17 through the ribbon.
The upright rod 16 is fixedly connected with the bottom of one side of the compression container 1 through threads, the top end of the upright rod is connected with a dial indicator fixing rod 14, the tail end of the upright rod is connected with a dial indicator 15, and the height of the dial indicator 15 can be adjusted to enable a measuring head at the bottom of the dial indicator 15 to be arranged on the top surface of the loading screw rod 9.
The compression container 1 has an annular groove at the bottom, the diameter of which is consistent with that of the guard ring 2, and the guard ring 2 can be placed in the groove to fix the position of the groove.
The diameter and the height of the rubber heating belt 12 are slightly larger than the outer diameter of the guard ring 2 and are attached to the side wall of the guard ring 2 for placement.
The organic glass backing plate 4 is made of a waterproof material so as to prevent the influence on the water content of the sample in the test process, and the diameter of the organic glass backing plate is slightly smaller than that of the guard ring 2 and is arranged in the guard ring 2.
The cutting ring 5 is thick at the top and thin at the bottom, the outer diameter of the bottom is slightly smaller than the guard ring 2 and the organic glass backing plate 4, and the cutting edge can be placed into the guard ring 2 downwards.
The inner side of the bottom of the guide ring 6 is provided with a clamping groove which is annular and can be embedded into the opening of the cutting ring 5, and in order to prevent the water from losing from the gap between the guide ring 6 and the cutting ring 5 in the humidifying process, the guide ring is sealed by a waterproof sealing adhesive tape 20.
The permeable stone 10 is a humidifying device, and is arranged above the cutting ring 5 and inside the guide ring 6 for effectively humidifying.
The diameter of the loading upper cover 7 with holes is the same as that of the permeable stone 10, the loading upper cover is arranged above the permeable stone 10, and holes with the diameter of 3mm are uniformly distributed on the periphery of the top surface for optimizing the water permeable efficiency.
The two ends of the water guide protective ring 11 are open, one end of the water guide protective ring is embedded between the gap between the permeable stone 10 and the guide ring 6, the loading upper cover 7 with holes is placed in the middle, and the periphery of the loading upper cover 7 with holes is hermetically connected with the water guide protective ring 11 by using a waterproof sealing adhesive tape 20 so as to prevent water loss.
The loading screw 9 penetrates through a threaded hole in the middle of the loading cross beam 8, so that the spherical tip at the bottom of the loading screw 9 is in close contact with the spherical groove in the top surface of the loading upper cover 7 with the hole, and two ends of the loading cross beam 8 are connected with a vertical rod of the device to transfer lever load.
In the using process, water is injected into the water guide guard ring 11 by an injector to be humidified, and a rubber heating belt 12 and a bath heater 18 are adopted for drying.
The utility model discloses a device contains following step in the use:
(1) A dial indicator 15, a dial indicator fixing rod 14 and a vertical rod 16 are fixed in a compression container 1, a protective ring 2 is arranged in the compression container 1 along a groove, an organic glass base plate 4 is arranged in the protective ring 2, a sample cutting edge is downwards arranged above the organic glass base plate 4 after sample preparation, and a layer of filter paper is paved on the upper part and the lower part of a soil sample to avoid soil particle loss in the test process;
(2) Connecting a guide ring 6 with a cutting ring 5 along a clamping groove, winding and sealing a gap between the guide ring 6 and the outer part of the cutting ring 5 by using a waterproof sealant 20, placing a permeable stone 10 with a diameter slightly smaller than that of the guide ring 6 in the guide ring 6, placing a loading upper cover 7 with a hole above the permeable stone 10, inserting a water guide guard ring 11 into the gap between the permeable stone 10 and the guide ring 6, and winding and sealing the water guide guard ring 11 and the outer part of the guide ring 6 by using a waterproof sealing adhesive tape 20;
(3) The compression container 1 and components placed inside the compression container are integrally placed below the loading cross beam 8, the spherical groove on the top surface of the loading upper cover 7 with the hole is opposite to the loading screw 9, the loading screw 9 is screwed down to be matched with the spherical groove, the measuring head at the bottom of the dial indicator 15 is placed on the top surface of the loading screw 9, and a weight can be placed to load a sample after preloading;
(4) After the sample is solidified, dry-wet circulation can be carried out, and in the humidifying process: and calculating the water adding amount according to the dry-wet circulation amplitude, weighing the required water amount, injecting water into the water guide retaining ring 11 by using an injector, and reading the reading of the dial indicator 15 in the test process until the expansion deformation of the test sample is stable. In the drying process: opening the rubber heating belt 12 and the bath heater 18, controlling the drying time by the time determined by measuring the water content before the formal test is carried out, and reading the reading of the dial indicator 15 until the sample is stable in shrinkage deformation;
(5) The above is a dry-wet cycle, and different dry-wet cycle times can be drawn up according to different test requirements for testing.
Claims (10)
1. The utility model provides a load and test device that contracts that swells of soil sample under wet and dry circulation coupling effect which characterized in that: the compression device comprises a compression container (1), a retaining ring (2) is placed in the compression container (1), a cutting ring (5) is placed in the retaining ring (2), a permeable stone (10) with the diameter smaller than the inner diameter of the retaining ring (5) is placed on the cutting ring (5), a loading upper cover (7) with holes is placed on the permeable stone (10), a guide ring (6) is sleeved outside the cutting ring (5) and the permeable stone (10), a water guide retaining ring (11) which sleeves the loading upper cover (7) with holes is placed at the top of the guide ring (6), a loading cross beam (8) is arranged above the water guide retaining ring (11), the bottom end of a thread of a loading screw (9) penetrates through the loading cross beam (8) to abut against the center of the top of the loading upper cover (7) with holes, the top surface of the loading screw (9) is in contact with a measuring head of a dial indicator (15), and the bottom of the dial indicator (15) is fixed in the compression container (1) through a connecting rod piece.
2. The soil sample expansion and contraction test device under the coupling effect of load and dry-wet cycle of claim 1, wherein: the connecting rod piece comprises a vertical rod (16) in threaded connection with the compression container (1), the top of the vertical rod (16) is fixedly connected with a dial indicator fixing rod (14), and the tail end of the dial indicator fixing rod (14) is connected with a dial indicator (15).
3. The soil sample expansion and contraction test device under the coupling effect of load and dry-wet cycle of claim 1, wherein: the drying device comprises a rubber heating belt (12) sleeved on the outer wall of the protective ring (2) and a bathroom heater (18) arranged at the top of the dial indicator (15), wherein the bathroom heater (18) is fixed to the top of the supporting frame (17).
4. The soil sample expansion and contraction test device under the coupling effect of load and dry-wet cycle according to claim 3, characterized in that: and heat insulation films (19) are arranged around the supporting frame (17).
5. The soil sample expansion and contraction test device under the coupling effect of load and dry-wet cycle of claim 1, wherein: an organic glass base plate (4) is arranged at the bottom in the guard ring (2), and a cutting ring (5) is placed on the organic glass base plate (4).
6. The soil sample expansion and contraction test device under the coupling effect of load and dry-wet cycle of claim 1, wherein: a lantern ring (3) is placed in the protective ring (2), and a cutting ring (5) is placed in the lantern ring (3).
7. The soil sample expansion and contraction test device under the coupling effect of load and dry-wet cycle of claim 1, wherein: the upper part and the lower part of the guide ring (6) are respectively connected with the cutting ring (5) and the water guide guard ring (11) in a bonding way through a waterproof sealing adhesive tape (20).
8. The soil sample expansion and contraction test device under the coupling effect of load and dry-wet cycle of claim 1, wherein: the middle of the top of the loading upper cover with holes (7) is provided with a protruding part, the top surface of the protruding part is provided with a hemispherical groove, the bottom of the loading screw (9) is abutted against the hemispherical groove, and holes penetrating through the top bottom of the loading upper cover with holes (7) are arranged on the loading upper cover with holes.
9. The soil sample swelling and shrinking test device under the coupling effect of load and dry-wet cycle according to claim 1, characterized in that: and a balance nut (13) is sleeved on the loading screw rod (9) above the loading cross beam (8) in a threaded manner.
10. The soil sample expansion and contraction test device under the coupling effect of load and dry-wet cycle of claim 1, wherein: the bottom of the compression container (1) is provided with an annular groove, and the guard ring (2) is clamped in the annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220346613.0U CN217879172U (en) | 2022-08-05 | 2022-08-05 | Soil sample expansion and shrinkage test device under load and dry-wet cycle coupling effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220346613.0U CN217879172U (en) | 2022-08-05 | 2022-08-05 | Soil sample expansion and shrinkage test device under load and dry-wet cycle coupling effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217879172U true CN217879172U (en) | 2022-11-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220346613.0U Active CN217879172U (en) | 2022-08-05 | 2022-08-05 | Soil sample expansion and shrinkage test device under load and dry-wet cycle coupling effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217879172U (en) |
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2022
- 2022-08-05 CN CN202220346613.0U patent/CN217879172U/en active Active
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