CN113252883A - Roadbed filler expansion tester and testing method and sample preparation method thereof - Google Patents
Roadbed filler expansion tester and testing method and sample preparation method thereof Download PDFInfo
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- CN113252883A CN113252883A CN202110580857.5A CN202110580857A CN113252883A CN 113252883 A CN113252883 A CN 113252883A CN 202110580857 A CN202110580857 A CN 202110580857A CN 113252883 A CN113252883 A CN 113252883A
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- 238000012360 testing method Methods 0.000 title claims abstract description 133
- 239000000945 filler Substances 0.000 title claims abstract description 65
- 238000005464 sample preparation method Methods 0.000 title claims description 9
- 238000011049 filling Methods 0.000 claims abstract description 48
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 32
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 32
- 241001330002 Bambuseae Species 0.000 claims abstract description 32
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 32
- 239000011425 bamboo Substances 0.000 claims abstract description 32
- 238000005056 compaction Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 76
- 238000002360 preparation method Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 230000008961 swelling Effects 0.000 claims description 9
- 238000011068 loading method Methods 0.000 claims description 7
- 230000035699 permeability Effects 0.000 claims description 6
- 239000013589 supplement Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 9
- 238000002791 soaking Methods 0.000 abstract description 3
- 239000002689 soil Substances 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000007571 dilatometry Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/42—Road-making materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/30—Measuring arrangements characterised by the use of mechanical techniques for measuring the deformation in a solid, e.g. mechanical strain gauge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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Abstract
The utility model relates to a geotechnique's test instrument especially relates to a roadbed filler inflation volume tester, including a examination section of thick bamboo and percentage table, examination section of thick bamboo upper end opening, examination section of thick bamboo intussuseption is filled with the sample that is in the compaction state, and the vertical dismantlement of percentage table is connected in examination section of thick bamboo top, and the gauge head of percentage table passes through the last port butt of examination section of thick bamboo in the sample top. Because the sample is tested by soaking after the compaction treatment is carried out by simulating the actual roadbed filling construction, the state of the sample is closer to the state of the actual roadbed filling, and the expansion amount of the sample can more accurately reflect the expansion amount of the actual roadbed filling, thereby achieving the purpose of improving the testing precision of the roadbed filling expansion amount.
Description
Technical Field
The application relates to a geotechnical test instrument, in particular to a roadbed filler expansion tester and a test method and a sample preparation method thereof.
Background
Under natural environment condition, receive the influence of factors such as weather humidity, groundwater and natural precipitation, the inflation of certain degree can take place for the road bed filler, can lead to the road bed to warp when the inflation volume of road bed filler is too big, can seriously influence railway driving safety this moment, consequently need learn the inflation volume of road bed filler in order to confirm whether qualified in road bed filler through the expansion test.
At present, the experimenter can carry out the expansion test of the fine granular soil listed in the geotechnical test specification, so that the expansion amount of the fine granular soil can be known, and the expansion amount of the roadbed filler consisting of the fine granular soil can be indirectly known approximately.
According to the related technology, the roadbed filler can be compacted during actual construction, and the roadbed filler can deform slightly at the moment, so that the actual expansion amount of the roadbed filler cannot be accurately reflected by the expansion amount of the tested fine-grained soil material, and the testing precision of the expansion amount of the roadbed filler is low.
Disclosure of Invention
In order to improve the testing precision of the roadbed filler expansion amount, the application provides a roadbed filler expansion amount tester and a testing method and a sample preparation method thereof.
In a first aspect, the application provides a roadbed filler expansion tester, adopts following technical scheme:
the utility model provides a road bed filler inflation volume test instrument, includes a examination section of thick bamboo and percentage table, and examination section of thick bamboo upper end opening, examination section of thick bamboo intussuseption are filled with the sample that is in the compaction state, and the vertical connection of dismantling of percentage table is in examination section of thick bamboo top, and the gauge head of percentage table passes through the last port butt of a examination section of thick bamboo in the sample top.
By adopting the technical scheme, in the using process, firstly, the roadbed filling material is filled into the test cylinder from the upper end opening of the test cylinder, and is compacted into a test sample, and the height of the upper surface of the test sample is flush with the height of the wall of the test cylinder on the bottom surface of the circular groove; then, mounting a dial indicator on the test cylinder, placing the test cylinder with the test sample in a water tank, adjusting the dial indicator to enable a measuring head of the dial indicator to abut against the upper part of the test sample, and reading and recording an initial reading of the dial indicator; injecting water into the water tank, wherein the water level is kept above the sample, and at the moment, the water enters the test cylinder through the upper end opening of the test cylinder; standing for about 48 hours, so that the sample can be soaked by water to expand, the height of the upper side of the sample can rise at the moment, and then the upper side of the sample jacks up a measuring head of the dial indicator, so that the reading of the dial indicator changes, the final reading of the dial indicator is read and recorded, and the difference value between the final reading and the initial reading is the expansion amount of the sample; because the sample is tested by soaking after the compaction treatment is carried out by simulating the actual roadbed filling construction, the state of the sample is closer to the state of the actual roadbed filling, and the expansion amount of the sample can more accurately reflect the expansion amount of the actual roadbed filling, thereby achieving the purpose of improving the testing precision of the roadbed filling expansion amount.
Optionally, the test tube includes base and barrel, and the equal opening in barrel both ends, the lower port department at the barrel is connected to the base, and the porous disk has the water permeability under the fixedly connected with between the lower port of base and barrel, lower porous disk.
Through adopting above-mentioned technical scheme, at the in-process of pouring water in to the basin, the water in the basin can be through in the porous disk gets into the examination section of thick bamboo down, along with the water level risees gradually in the basin, the sample in the examination section of thick bamboo can soak in water, and porous disk and examination section of thick bamboo up end can provide the route in getting into the examination section of thick bamboo for the water in the basin at last down to make the sample in the examination section of thick bamboo can be more abundant soak in aqueous, reached the purpose that further improves the test accuracy of roadbed filler inflation volume.
Optionally, the sample top butt has last porous disk, goes up the porous disk and has the water permeability, and the gauge head butt of percentage table is above last porous disk.
Through adopting above-mentioned technical scheme, when the sample in the test tube soaks in aqueous, go up the porous disk and can provide the route in getting into the test tube for the water in the basin with lower porous disk, because last porous disk butt is in the top of sample this moment, so the experimenter learns the inflation condition of sample through the altitude variation of porous disk upside in the test to the altitude variation that makes the test surface is comparatively even, and then can make the test result more accurate.
Optionally, one side of the upper porous plate, which is close to the dial indicator, is fixedly connected with a positioning piece, and a measuring head of the dial indicator abuts against the positioning piece.
Through adopting above-mentioned technical scheme, after to the basin water injection, the one end of porous disk was kept away from to the high one end that need be less than the setting element of surface of water, and the gauge head of percentage table can be in the surface of water top this moment, consequently can reduce the buoyancy of water and lead to the fact the possibility of disturbing to the test of percentage table, has reached the purpose that improves the measuring accuracy of dilatometry tester.
Optionally, one side of the upper porous plate, which is far away from the sample, is abutted with a load bearing plate, and the end part of the positioning element, which is far away from the upper porous plate, is abutted with a measuring head of the dial indicator after penetrating through the load bearing plate.
Through adopting above-mentioned technical scheme, in the testing process, can be according to the different load boards of test demand installation weight on last porous disk, can carry the load expansion test to the sample this moment, and then can learn the inflation volume of sample under the different load circumstances, consequently inflation volume tester can test the inflation volume of roadbed filler under the more load circumstances.
Optionally, an annular groove is formed in the upper end of the test tube, the annular groove penetrates through the inner wall of the test tube along the thickness direction of the wall of the test tube, the upper water permeable plate and the loading plate are both located in the annular groove, the upper water permeable plate and the loading plate are abutted to the inner wall of the upper end of the test tube, a water through hole is formed in the wall of the test tube in a penetrating mode, and the water through hole is communicated with the annular groove.
By adopting the technical scheme, when the roadbed filling is compacted into the test cylinder to form the test sample, the upper side of the test sample can be aligned with the test cylinder wall on the bottom surface of the circular groove, and the upper porous plate and the load-bearing plate are directly placed in the circular groove in the follow-up process, so that the test sample, the upper porous plate and the load-bearing plate can be conveniently installed and positioned, and the purpose of facilitating a tester to use an expansion tester to test is achieved; at this time, the lower porous disk, the upper porous disk and the water through hole provide a passage for water in the water tank to enter the test cylinder.
Optionally, the up end butt of examination section of thick bamboo has connect the table frame, and the table frame is the annular, and the interior edge of table frame flushes with the examination section of thick bamboo inner wall of annular department, and the table frame can be dismantled with a examination section of thick bamboo and be connected, and the percentage table is connected on the table frame.
Through adopting above-mentioned technical scheme, after the sample takes place the inflation, the upside of sample shifts up can with locating plate and load board jack-up, and locating plate and load board can be upwards slided in the test tube of annular department and the table frame this moment, consequently can reduce the possibility that locating plate and load board produced horizontal displacement relative sample, has reached the purpose that improves the measuring accuracy of inflation volume tester.
In a second aspect, the application provides a testing method of a roadbed filler expansion tester, which adopts the following technical scheme:
a testing method of a roadbed filler expansion tester comprises the following steps:
s1, filling roadbed filling materials into the test cylinder from the upper end opening of the test cylinder, compacting the roadbed filling materials into a test sample, wherein the height of the upper surface of the test sample is flush with the height of the test cylinder wall on the bottom surface of the circular groove;
s2, placing a permeable plate on the sample;
s3, mounting the loading plate on the upper permeable plate;
s4, mounting a meter stand on the test tube;
s5, placing the roadbed filling expansion tester in a water tank;
s6, adjusting the dial indicator to enable the measuring head of the dial indicator to abut against the positioning piece, and reading and recording the initial reading of the dial indicator;
s6, injecting water into the water tank, wherein the water level is kept above the sample and is lower than the upper end of the positioning piece;
and S7, standing for 45-55 hours, reading and recording the final reading of the dial indicator, wherein the difference value between the final reading and the initial reading is the swelling capacity.
Through adopting above-mentioned technical scheme, in the use, the water in the basin can soak the sample, and the sample can take place the inflation, and the height of sample upside can change this moment, learns the inflation volume that the altitude variation of sample upside can record the sample through the percentage table, consequently tests the inflation volume convenient operation of road bed filler through inflation volume tester.
In a third aspect, the sample preparation method of the roadbed filler expansion tester provided by the application adopts the following technical scheme:
a sample preparation method of a roadbed filler expansion tester comprises the following steps:
s1, detachably connecting a sample preparation cylinder to the upper port of the test cylinder, wherein the sample preparation cylinder is parallel to the test cylinder, and the inner wall of the sample preparation cylinder is flush with the inner wall of the test cylinder;
s2, filling roadbed filling materials into the test cylinder;
s3, inserting a pressure head into the sample making barrel, wherein the pressure head comprises a top plate and a pressure block, the pressure block is connected below the top plate, the sectional area of the pressure block is smaller than that of the top plate until the lower side of the top plate abuts against the upper end face of the sample making barrel, and at the moment, roadbed fillers in the sample making barrel can be compacted into a sample;
and S4, detaching the sample preparation cylinder from the test cylinder.
Through adopting above-mentioned technical scheme, at the in-process that will pack into the road bed filler compaction in the test section of thick bamboo, the tester through the downside butt of observing the roof learn the road bed filler compaction completion that can on the up end of system appearance section of thick bamboo, reached the purpose that makes things convenient for the dilatometry tester system appearance.
Optionally, in step S3, the pressure heads are multiple, the pressing blocks of the multiple pressure heads are different in length, the pressure head with the longest pressing block length is inserted into the sample making cylinder and compacts the roadbed filler, the pressure head with the longest pressing block length is taken out and the roadbed filler is supplemented, the pressing heads with the gradually decreased pressing block length are sequentially inserted to repeat the compacting step until the lower end of the pressing block is flush with the inner wall of the test cylinder on the bottom surface of the ring groove, and the roadbed filler in the test cylinder is compacted into a test sample.
By adopting the technical scheme, in the sample preparation process, the pressure heads with different lengths of the pressing blocks successively compact the roadbed filler in the test cylinder, at the moment, the sample is prepared by the layered compacted roadbed filler, and the actual roadbed filler construction needs layered compaction, so that the state of the sample is more similar to the use state of the actual roadbed filler, and the purpose of further improving the testing precision of the roadbed filler expansion amount is achieved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. by arranging the test cylinder and the dial indicator, the test sample is prepared after compaction treatment is carried out by simulating actual roadbed filler construction, so that the state of the test sample is closer to the state of the actual roadbed filler, the expansion amount of the test sample can more accurately reflect the expansion amount of the actual roadbed filler, and the aim of improving the test precision of the roadbed filler expansion amount is fulfilled;
2. when the swelling amount of the roadbed filler is tested, the water in the water tank can soak the sample, the sample can swell, the height of the upper side of the sample can be changed at the moment, the swelling amount of the sample can be measured by knowing the height change of the upper side of the sample through the dial indicator, and the purpose of conveniently testing the swelling amount of the roadbed filler by using the swelling amount tester is achieved;
3. in the course of the roadbed filler compaction in the test tube to be packed into, the tester learns that the roadbed filler compaction is accomplished through the downside butt of observing the roof can on the up end of system appearance section of thick bamboo, has reached the purpose that makes things convenient for the inflation volume test appearance system appearance.
Drawings
Fig. 1 is a sectional view of a roadbed filling expansion tester of an embodiment of the application;
fig. 2 is a schematic structural diagram of a roadbed filling expansion tester of the embodiment of the application;
fig. 3 is an exploded view of a sample preparation state of the roadbed filling expansion tester of the embodiment of the application.
Description of reference numerals: 1. a sample; 2. testing the cylinder; 21. a base; 22. a barrel; 221. a ring groove; 222. a water inlet; 3. a dial indicator; 4. a lower permeable plate; 5. a water permeable plate is arranged; 51. a positioning member; 6. a loading plate; 7. a watch frame; 71. a collar; 711. a bolt; 8. preparing a sample cylinder; 9. a pressure head; 91. a top plate; 92. and (7) briquetting.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses a roadbed filler expansion tester. Referring to fig. 1, the inflation volume tester is used for testing the inflation volume of sample 1 made by the road bed filler, and the inflation volume tester includes a test section of thick bamboo 2 and percentage table 3, and a test section of thick bamboo 2 is vertical to be set up and the upper end opening, and sample 1 compaction is filled in a test section of thick bamboo 2, and the vertical connection of dismantling in a test section of thick bamboo 2 top of percentage table 3, and the gauge head of percentage table 3 passes through the upper end opening butt of a test section of thick bamboo 2 in sample 1 top. In the testing process, the test tube 2 can be placed into water, the compacted sample 1 can be soaked by the water, the sample 1 can expand after a period of time, the height of the upper side of the sample 1 can change, and a tester can know the height change of the upper side of the sample 1 through the dial indicator 3 so as to know the expansion amount of the sample 1; at the moment, the sample 1 is prepared after compaction treatment is carried out by simulating actual roadbed filling construction, so that the state of the sample 1 is closer to the state of the actual roadbed filling, the expansion amount of the sample 1 can more accurately reflect the expansion amount of the actual roadbed filling, and the aim of improving the testing precision of the roadbed filling expansion amount is fulfilled.
Referring to fig. 1, the test tube 2 comprises a base 21 and a tube 22, the tube 22 is vertically arranged, two ends of the tube 22 are both open, the base 21 is connected to the lower port of the tube 22, a lower porous plate 4 is fixedly connected between the base 21 and the lower port of the tube 22, and the lower porous plate 4 has water permeability; the upper end of the cylinder body 22 is provided with a ring groove 221, the ring groove 221 penetrates through the inner wall of the cylinder body 22 along the wall thickness direction of the cylinder body 22, the wall of the cylinder body 22 is provided with a water through opening 222 in a penetrating manner, and the water through opening 222 is communicated with the ring groove 221; sample 1 butt is in barrel 22, the upside of sample 1 flushes with the barrel 22 wall of annular 221 bottom surface, sample 1 top butt has last porous disk 5, it has the water permeability to go up porous disk 5, go up porous disk 5 upside fixedly connected with setting element 51, setting element 51 is vertical cylinder, it has load-bearing plate 6 to go up porous disk 5 upside butt, it all is located annular 221 with load-bearing plate 6 to go up porous disk 5, go up porous disk 5 and load-bearing plate 6 all with the inner wall butt of barrel 22 upper end, the setting element 51 upper end pass behind the load-bearing plate 6 with the gauge head butt of percentage table 3.
Referring to fig. 1, in the testing process, firstly, roadbed filling is filled into a test cylinder 2 from the upper end opening of a cylinder body 22, the roadbed filling is compacted into a sample 1, then an upper permeable plate 5 and a load bearing plate 6 are sequentially placed in a ring groove 221 of the cylinder body 22, a dial indicator 3 is installed on the cylinder body 22, and the ring groove 221 facilitates installation and positioning of the upper permeable plate 5 and the load bearing plate 6; then, placing the swelling capacity tester in the water tank, adjusting the dial indicator 3 to enable the measuring head of the dial indicator 3 to be abutted against the upper end of the positioning piece 51, and reading and recording the initial reading of the dial indicator 3; injecting water into the water tank, wherein the water in the water tank enters the test cylinder 2 through the lower water permeable plate 4, the water level gradually rises until the water level is kept above the sample 1 and is lower than the upper end of the positioning part 51, the sample 1 in the cylinder 22 is soaked in the water, and the lower water permeable plate 4, the upper water permeable plate 5 and the water through port 222 provide a passage for the water in the water tank to enter the cylinder 22, so that the sample 1 in the cylinder 22 can be more fully soaked in the water, and the purpose of improving the testing precision of the roadbed filling expansion amount is achieved; standing for about 48 hours at last, so that the sample 1 is soaked by water and expands, the height of the upper side of the sample 1 rises, the upper side of the sample 1 jacks up the upper permeable plate 5 and the load bearing plate, and the measuring head of the dial indicator 3 is jacked up, so that the reading of the dial indicator 3 changes, the final reading of the dial indicator 3 is read and recorded, and the difference value between the final reading and the initial reading is the expansion amount; if the expansion of the no-load expansion of the test specimen 1 needs to be tested, the load-carrying plate 6 does not need to be installed.
Referring to fig. 1 and 2, a meter stand 7 is abutted to the upper end face of the cylinder 22, the meter stand 7 is in a horizontal ring shape, the inner edge of the meter stand 7 is flush with the inner wall of the cylinder 22 at the annular groove 221, a lantern ring 71 is fixedly connected to the lower portion of the meter stand 7, the lantern ring 71 is sleeved outside the cylinder 22, a bolt 711 is connected to the lantern ring 71 in a threaded manner, the bolt 711 penetrates through the lantern ring 71 and abuts against the outer wall of the cylinder 22, and the dial plate of the dial indicator 3 is fixedly connected to the meter stand 7; the water passage port 222 is located below the collar 71. In the process of mounting the dial indicator 3 on the cylinder 22, the meter holder 7 can be mounted on the cylinder 22, and the meter holder 7 can stabilize the position of the dial indicator 3 in a subsequent test state; after the sample 1 expands, the positioning plate and the load plate 6 are jacked up by upward movement of the upper side of the sample 1, and at the moment, the positioning plate and the load plate 6 slide upwards in the cylinder 22 at the annular groove 221 and the watch frame 7, so that the possibility of horizontal displacement of the positioning plate and the load plate 6 relative to the sample 1 can be reduced, and the aim of further improving the testing precision of the expansion tester is fulfilled.
The implementation principle of the roadbed filler expansion tester in the embodiment of the application is as follows: in the testing process, firstly, roadbed filling materials are loaded into the test cylinder 2 from the upper end opening of the cylinder body 22 and are compacted into a sample 1, and the height of the upper surface of the sample 1 is flush with the height of the wall of the cylinder body 22 at the bottom surface of the ring groove 221; then installing a permeable plate 5, a loading plate 6 and a meter frame 7 with a dial indicator 3 on the cylinder 22, placing the test cylinder 2 with the sample 1 in a water tank, adjusting the dial indicator 3 to enable a measuring head of the dial indicator 3 to be abutted against the upper end of the positioning piece 51, and reading and recording an initial reading of the dial indicator 3; injecting water into the water tank, wherein the water level is kept above the sample 1, and the water enters the cylinder 22; standing for about 48 hours, the sample 1 is soaked by water to swell, the height of the upper side of the sample 1 is increased at the moment, and the sample 1 is further enabled to jack up the measuring head of the dial indicator 3 upwards, so that the reading of the dial indicator 3 is changed, the final reading of the dial indicator 3 is read and recorded, and the difference value between the final reading and the initial reading is the swelling capacity of the sample 1; because the sample 1 is tested by soaking after the compaction treatment is carried out by simulating the actual roadbed filling construction, the state of the sample 1 is closer to the state of the actual roadbed filling, and the expansion amount of the sample 1 can more accurately reflect the expansion amount of the actual roadbed filling, thereby achieving the purpose of improving the testing precision of the roadbed filling expansion amount.
The embodiment of the application also discloses a testing method of the roadbed filler expansion tester, which refers to fig. 1 and comprises the following steps:
s1, filling the roadbed filling material into the test cylinder 2 from the upper end opening of the cylinder body 22, compacting the roadbed filling material into a test sample 1, wherein the height of the upper surface of the test sample 1 is flush with the height of the wall of the cylinder body 22 at the bottom surface of the ring groove 221;
s2, placing a permeable plate 5 on the sample 1;
s3, mounting the loading plate 6 on the upper permeable plate 5;
s4, mounting the meter stand 7 on the cylinder 22;
s5, placing the roadbed filling expansion tester in the water tank, and keeping the cylinder 22 vertical at the moment;
s6, adjusting the dial indicator 3 to enable the measuring head of the dial indicator 3 to abut against the positioning piece 51, and reading and recording the initial reading of the dial indicator 3;
s6, injecting water into the water tank, wherein the water level is kept above the sample 1 and is lower than the upper end of the positioning piece 51;
and S7, standing for about 48 hours, reading and recording the final reading of the dial indicator 3, wherein the difference value between the final reading and the initial reading is the swelling capacity.
Referring to fig. 1, at the in-process of test sample 1 inflation volume, the water in the basin can soak sample 1 to make sample 1 can take place the inflation, the height of sample 1 upside can change this moment, learns the high change of sample 1 upside through percentage table 3 and can record the inflation volume of sample 1, consequently tests the inflation volume convenient operation of road bed filler through inflation volume tester.
The embodiment of the application also discloses a sample preparation method of the roadbed filler expansion tester, which refers to fig. 3 and comprises the following steps:
s1, inserting a sample preparation cylinder 8 into the upper port of the cylinder body 22, wherein the sample preparation cylinder 8 is vertically arranged and has two open ends, the lower end of the sample preparation cylinder 8 is inserted into the upper port of the cylinder body 22 through a ring groove 221, and the inner wall of the sample preparation cylinder 8 is flush with the inner wall of the cylinder body 22;
s2, filling roadbed filling materials into the test cylinder 2;
s3, inserting a pressure head 9 into the sample making barrel 8, wherein the pressure head 9 comprises a top plate 91 and a pressing block 92, the pressing block 92 is connected below the top plate 91, and the sectional area of the pressing block 92 is smaller than that of the top plate 91; the pressing heads 9 are arranged in a plurality of numbers, the pressing blocks 92 of the pressing heads 9 are different in length, the pressing head 9 with the longest pressing block 92 is firstly inserted into the sample making cylinder 8 until the lower side of the top plate 91 is abutted to the upper end face of the sample making cylinder 8, and the pressing heads 9 can compact a layer of roadbed filling material; then taking out the pressure head 9 with the longest length of the pressing block 92 and supplementing roadbed fillers, sequentially inserting the pressure heads 9 with the lengths gradually reduced of the pressing block 92 and repeating the compaction steps until the upper side of the compacted sample 1 is flush with the inner wall of the cylinder 22 at the bottom surface of the ring groove 221, and then compacting the roadbed fillers in the cylinder 22 into the sample 1 in multiple layers;
s4, the sample preparation cylinder 8 is detached from the cylinder 22.
Referring to fig. 3, in the process of preparing a sample by the expansion amount tester, the pressure heads 9 with different lengths of the plurality of pressure blocks 92 sequentially compact the roadbed filler in the test cylinder 2, at this time, the test sample 1 is prepared by layering and compacting the roadbed filler, and is similar to the layering and compacting construction process of actual roadbed filler construction, so that the state of the test sample 1 is more similar to the use state of the actual roadbed filler, and the purpose of further improving the test precision of the roadbed filler expansion amount is achieved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides a road bed filler inflation volume tester which characterized in that: including a test tube (2) and percentage table (3), open end on the test tube (2), the intussuseption of test tube (2) is filled with sample (1) that is in the compaction state, and the connection in test tube (2) top can be dismantled vertically in percentage table (3), and the top port butt of the gauge head through a test tube (2) of percentage table (3) is in sample (1) top.
2. The roadbed filler expansion tester as claimed in claim 1, wherein: test section of thick bamboo (2) are including base (21) and barrel (22), and the equal opening in barrel (22) both ends, and lower port department at barrel (22) is connected in base (21), and water permeable plate (4) under the fixedly connected with between the lower port of base (21) and barrel (22), lower water permeable plate (4) have the water permeability.
3. The roadbed filler expansion tester as claimed in claim 1, wherein: sample (1) top butt has last porous disk (5), goes up porous disk (5) and has the water permeability, and the gauge head butt of percentage table (3) is above last porous disk (5).
4. The roadbed filler expansion tester as claimed in claim 3, wherein: one side of the upper permeable plate (5) close to the dial indicator (3) is fixedly connected with a positioning piece (51), and a measuring head of the dial indicator (3) is abutted against the positioning piece (51).
5. The roadbed filler expansion tester as claimed in claim 4, wherein: one side of the upper permeable plate (5) far away from the sample (1) is abutted with a load bearing plate (6), and the end part of the positioning piece (51) far away from the upper permeable plate (5) penetrates through the load bearing plate (6) and then is abutted with a measuring head of the dial indicator (3).
6. The roadbed filler expansion tester as claimed in claim 5, wherein: annular groove (221) have been seted up to examination section of thick bamboo (2) upper end, and annular groove (221) run through examination section of thick bamboo (2) inner wall along the thickness direction of examination section of thick bamboo (2) wall, go up porous disk (5) and all lie in annular groove (221) with load board (6), and go up porous disk (5) and load board (6) all with the upper end inner wall butt of examination section of thick bamboo (2), run through on examination section of thick bamboo (2) wall and seted up limbers (222), limbers (222) and annular groove (221) intercommunication.
7. The roadbed filler expansion tester as claimed in claim 6, wherein: the upper end surface of the test tube (2) is abutted with a meter frame (7), the meter frame (7) is annular, the inner edge of the meter frame (7) is flush with the inner wall of the test tube (2) at the annular groove (221), the meter frame (7) is detachably connected with the test tube (2), and the dial indicator (3) is connected to the meter frame (7).
8. A method for testing a roadbed filling expansion tester as claimed in any one of claims 1-7, characterized by comprising the following steps:
s1, the roadbed filler is loaded into the test cylinder (2) from the upper port of the test cylinder (2), and the roadbed filler is compacted into a test sample (1), wherein the height of the upper surface of the test sample (1) is flush with the height of the wall of the test cylinder (2) at the bottom surface of the ring groove (221);
s2, placing a permeable plate (5) on the sample (1);
s3, mounting the loading plate (6) on the upper permeable plate (5);
s4, mounting a meter frame (7) on the test tube (2);
s5, placing the roadbed filling expansion tester in a water tank;
s6, adjusting the dial indicator (3) to enable the measuring head of the dial indicator (3) to abut against the positioning piece (51), and reading and recording the initial reading of the dial indicator (3);
s6, injecting water into the water tank, wherein the water level is kept above the sample (1) and is lower than the upper end of the positioning piece (51);
and S7, standing for 45-55 hours, reading and recording the final reading of the dial indicator (3), wherein the difference value between the final reading and the initial reading is the swelling capacity.
9. A method for preparing a sample of the roadbed filling expansion tester as claimed in any one of claims 1-7, characterized by comprising the following steps:
s1, detachably connecting a sample preparation cylinder (8) to the upper port of the test cylinder (2), wherein two ends of the sample preparation cylinder (8) are open, the sample preparation cylinder (8) is parallel to the test cylinder (2), and the inner wall of the sample preparation cylinder (8) is flush with the inner wall of the test cylinder (2);
s2, filling roadbed filling materials into the test cylinder (2);
s3, inserting a pressure head (9) into the sample making barrel (8), wherein the pressure head (9) comprises a top plate (91) and a pressing block (92), the pressing block (92) is connected below the top plate (91), the sectional area of the pressing block (92) is smaller than that of the top plate (91), and the pressing block (92) abuts against the upper end face of the sample making barrel (8) until the lower side of the top plate (91) abuts against the upper end face of the sample making barrel (8), and at the moment, roadbed filling materials in the sample making barrel (2) are compacted into a sample (1);
s4, the sample making cylinder (8) is detached from the test cylinder (2).
10. The sample preparation method of the roadbed filling expansion tester as claimed in claim 9, wherein the sample preparation method comprises the following steps: in the step S3, the pressing heads (9) are arranged in a plurality, the pressing blocks (92) of the pressing heads (9) are different in length, the pressing head (9) with the longest length of the pressing block (92) is inserted into the sample preparation cylinder (8) and compacts the roadbed filling material, then the pressing head (9) with the longest length of the pressing block (92) is taken out and supplements the roadbed filling material, the pressing heads (9) with the longest length of the pressing block (92) are sequentially inserted into the pressing blocks (92) with the gradually reduced length, the compacting step is repeated until the lower end of the pressing block (92) is flush with the inner wall of the test cylinder (2) at the bottom surface of the ring groove (221), and the roadbed filling material in the test cylinder (2) is compacted into the sample (1).
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| CN202110580857.5A CN113252883A (en) | 2021-05-26 | 2021-05-26 | Roadbed filler expansion tester and testing method and sample preparation method thereof |
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| CN202110580857.5A CN113252883A (en) | 2021-05-26 | 2021-05-26 | Roadbed filler expansion tester and testing method and sample preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107807081A (en) * | 2017-10-18 | 2018-03-16 | 中国铁路设计集团有限公司 | A kind of roadbed filling permeameter and roadbed filling product method, method of testing |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9880081B1 (en) * | 2017-03-07 | 2018-01-30 | Ramesh Chandra Gupta | Expandable jacket for triaxial, unconfined and uniaxial compression tests and test device for three-dimensional consolidation and settlement tests |
| CN208520864U (en) * | 2018-08-02 | 2019-02-19 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of device for big particle diameter soil body microdilatancy testing experiment |
| CN210427563U (en) * | 2019-07-16 | 2020-04-28 | 中国铁路设计集团有限公司 | Coarse grain filler expansion tester |
-
2021
- 2021-05-26 CN CN202110580857.5A patent/CN113252883A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9880081B1 (en) * | 2017-03-07 | 2018-01-30 | Ramesh Chandra Gupta | Expandable jacket for triaxial, unconfined and uniaxial compression tests and test device for three-dimensional consolidation and settlement tests |
| CN208520864U (en) * | 2018-08-02 | 2019-02-19 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of device for big particle diameter soil body microdilatancy testing experiment |
| CN210427563U (en) * | 2019-07-16 | 2020-04-28 | 中国铁路设计集团有限公司 | Coarse grain filler expansion tester |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107807081A (en) * | 2017-10-18 | 2018-03-16 | 中国铁路设计集团有限公司 | A kind of roadbed filling permeameter and roadbed filling product method, method of testing |
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Application publication date: 20210813 |