CN101813690B - Testing device for simulating warp self-weight settlement consolidation process by settlement column indoors - Google Patents
Testing device for simulating warp self-weight settlement consolidation process by settlement column indoors Download PDFInfo
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- CN101813690B CN101813690B CN201010168502A CN201010168502A CN101813690B CN 101813690 B CN101813690 B CN 101813690B CN 201010168502 A CN201010168502 A CN 201010168502A CN 201010168502 A CN201010168502 A CN 201010168502A CN 101813690 B CN101813690 B CN 101813690B
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Abstract
The invention discloses a testing device for simulating a warp self-weight settlement consolidation process by a settlement column indoors, comprising an organic glass tube settlement column, a slurry stirrer, a soil sample geotome and the like. The body of the settlement column is connected with a base; a paper ruler is adhered outside the tube wall of the column body; slurry suspension is injected behind the body of the organic glass tube settlement column, the slurry suspension is stirred and mixed uniformly up and down by inserting the stirrer; the opening of the column body is sealed by a rubber band after the opening of the column body is sealed by a seal membrane; the settling height of the suspension level along with time is recorded by observing the paper ruler outside the tube wall so as to study the free settling law of the warp slurry under self-weight action; and after the warp self-weight settlement consolidation process is completed, soil is taken by the geotome layer by layer, the void ratio e of soil layers with different depths is detected, the warp self-weight consolidation law is studied, and the soil body consolidation coefficient cv is calculated. The testing device has the characteristics of small floor area, convenient operation, accurate and reliable data observation, less moisture loss, small soil sample disturbance and the like, and can be applied to early test study of river channel training, harbor desilting, backfill land reclamation and other engineering.
Description
Technical field
The invention belongs to Geotechnical Engineering fundamental test and environmental engineering interleaving techniques field, specifically relate to a kind of indoor settling leg simulation warp from resedimentation consolidation process test unit.
Background technology
Settling column test is the important tests device of research river lacustrine facies, marine facies warp sedimentation alluvial, the fixed rule of deadweight, utilize the settling column test device can the simulated determination variable concentrations under the deadweight coefficient of consolidation c of sedimentation warp mud
vTest findings is that training of channel widening project, harbour desilting are administered engineering, lake protection pollution treatment engineering etc. the basic engineering parameter is provided, and is the support that provides the necessary technical of engineering construction scheme and mentality of designing through indoor settling column test.The soil body also can be applicable to barged-in fill hydraulic reclamation epeirogenetic engineering from the research of resedimentation consolidation process, uses sedimentation deformation rule under the action of gravity of simulation laboratory test research barged-in fill.Thereby settling leg simulation warp from the test of resedimentation consolidation process in the river course, lake, harbour administer, and in the engineerings such as coastal reclaiming land around sea great importance arranged.
Soil sample coefficient of consolidation c
vCan be by multiple determination of test method, conventional shop experiment is to obtain soil body settling amount s and last relation curve between the t through multistage loading, inquires into the soil sample coefficient of consolidation according to curve.Indoor consolidation test confirms that the method application of the coefficient of consolidation is the most general, and its shortcoming is that the test test specimen is little, workload is big, test period is long, expense is high and the soil sample disturbance is big.Because soil sample can't reflect the working-yard physical condition accurately, the actual value of the laboratory test results and the on-the-spot soil body has bigger difference, can not reflect the actual coefficient of consolidation of the on-the-spot soil body fully, can't consider soil solidifying characteristics under the effect of soil body gravity stress.
Indoor settling column test is to study soil sample at high-moisture percentage, and high-voidage is than the fixed rule of gravity stress effect deposit under the condition.The soil sample initial concentration can be formulated as 2500% to 300%, and soil sample becomes flow state, and shearing strength is 0.Settling column test simulation warp is by bulk solid structure, flocculent structure sedimentation consolidation process under the deadweight effect.Confirm the residing state of the sedimentation soil body according to actual suspension liquid level and time relation, confirm the deadweight degree of consolidation and coefficient of consolidation c by soil body sedimentation consolidated thickness
vThe fixed characteristics of sedimentation under the effect of this test unit research soil body gravity stress are lasted longlyer, and the gravity stress coefficient of consolidation that records is the barged-in fill consolidation settlement rule research of depositing provides basic parameter with the warp deposition that the result is relatively accurate.
Summary of the invention
Technical matters:
The objective of the invention is to improve indoor consolidation test method; Development and design goes out under suitable high-moisture percentage, high void ratio, the gravity stress effect warp from the resedimentation consolidation process, make with the simple and reliable relatively indoor settling leg simulation warp of operating process from resedimentation consolidation process test unit.
The objective of the invention is to realize through following technical scheme:
A kind of indoor settling leg simulation warp deposition consolidation process test unit is characterized in that this device comprises settling leg, and slurry agitator, microvariations soil sample soil sample barrel three parts are formed.Wherein settling leg is connected with base by the plexi-glass tubular shaft, and the shaft outer wall is symmetrical set scale paper chi, and the shaft mouth of pipe seals through the bungee colligation with diaphragm seal; Slurry agitator is fixedly connected with the substrate dish through screw thread by Metallic rod; Microvariations soil sample soil sample barrel by heat-shrink tube fixedly thin-walled cutting ring string be connected with the metal handle, the set bolt on handle top is connected with built-in retaining plug.
High 800～the 1200mm of plexi-glass tubular shaft of described settling leg, wall thickness 8～12mm, internal diameter 100～130mm; Described base is that organic glass is made, and thickness 10～15mm, diameter 150～180mm settling leg shaft are fixedly connected with organic gel with base.
The Metallic rod length 1000～1400mm of described slurry agitator, diameter 2～3mm is fixedly connected with metal dish through end thread; Substrate dish diameter 90～120mm is symmetrical set four diameter 20～30mm draining circular holes, and there is an internal thread in central authorities.
The thin-walled cutting ring string of said soil sample barrel is that the monocycle cutter with 10 aluminium alloys is connected on the solid plastic rod; Tighten after shrinking with the heat-shrink tube outsourcing cooling of heating then; Extract solid plastic rod again; Single cutting ring internal diameter 15～20mm, high 10～20mm, the relative position of the built-in retaining plug of the set bolt rotation adjusting on described handle top in handle.
For ease of observing the turbid liquid level of mud t down position h in time, the settling leg tube wall outside is symmetrical set two minimum scale 1mm paper chis, files with the actual sedimentation of the turbid liquid level of camera Taking Pictures recording position and puts on record.Slurry agitator, by diameter 90～120mm substrate dish, with length 1000～1400mm Metallic rod with the composition that is threaded, be symmetrical set four diameter 20～30mm draining circular holes on the substrate dish.For preventing that upper strata moisture from excessively volatilizing, settling leg ferrule film seals with the bungee colligation.The soil sample soil sample barrel adopts lightweight microvariations original position soil sample barrel, mainly contains thin-walled cutting ring string, heat-shrink tube, handle, built-in retaining plug, set bolt composition.Single cutting ring is an aluminum alloy material, single cutting ring internal diameter 15～20m, and high 10～20mm is fixed by thermal shrinkage through heat-shrink tube, and is connected with handle; The relative position of set bolt rotation adjusting built-in retaining plug in handle top in handle, the layering of soil depth direction is fetched earth.
Before on-test, pre-configured test is injected suspension in the organic glass settling leg barrel with concentration warp mud suspension, inserts the slurry agitator 1～2min that stirs up and down, back and forth stirs to be no less than 30 times.Take out slurry agitator, diaphragm seal sealing settling leg barrel mouth, warp begins from the resedimentation consolidation process, record start time t
0Take the different turbid liquid level true altitude positions constantly of record with camera, confirm the fixed deadline of soil sample, prepare fixed soil sample sampling work according to the turbid liquid level sedimentation of warp change curve.Sampling adopts microvariations original position soil sample barrel to fetch earth, and measures soil layer different depth void ratio e, according to coefficient of consolidation computing formula confirmed test soil sample coefficient of consolidation c
v
Innovative point of the present invention:
1, the settling leg shaft adopts plexi-glass tubular, and intensity is high, can bear big water pressure; Even tube wall is transparent, is convenient to the liquid level reading; The strength of joint of tube wall and base is high, permanance is strong, good airproof performance, and duration of test does not have the sepage of leaking phenomenon; Processing and making process is simple.
2, the settling leg tube wall outside is symmetrical set minimum scale 1mm paper chi, and reading is got its mean value; Avoid that plastics, metal species material expand with heat and contract with cold, the unequal factor affecting of turbid liquid level because adopt, improve reading accuracy;
3, settling leg ferrule film sealing effectively reduces moisture evaporation, and anti-sealing liquid surface evaporation reduces excessive.
4, the deposition soil sample adopts " direct method " small disturbance soil sampler original position to fetch earth, and improves data reliability.
Advantage of the present invention: indoor settling leg simulation warp is measured the sedimentation coefficient of consolidation under high-moisture percentage, the high void ratio warp deadweight effect from resedimentation consolidation process test unit; The research warp possesses the whole settling process of early strength to the deadweight consolidation settlement Zi the state of flowing; Overcome that general indoor compression consolidation test can't be measured the high-moisture percentage soil sample coefficient of consolidation, the test test specimen is little, workload is big, expense is high and the soil sample disturbance is big, must stage loading, and the drawback of ignoring soil sample gravity stress factor affecting.The fixed characteristics of sedimentation under the test unit research soil body gravity stress of the present invention effect, test lasts longer, and the gravity stress coefficient of consolidation that records is that barged-in fill consolidation settlement and the research of warp deposition alluvial rule provide basic parameter, and the result is relatively accurate reliable.
Description of drawings
Accompanying drawing 1 is the settling leg synoptic diagram of indoor settling leg simulation warp from resedimentation consolidation process test unit;
Accompanying drawing 2 is the synoptic diagram of slurry agitator;
Accompanying drawing 3 is the vertical view of slurry agitator substrate dish;
Accompanying drawing 4 is the synoptic diagram of in-situ small disturbance soil sampler.
Label among the figure: 1 plexi-glass tubular shaft; 2 settling leg bases; 3 scale paper chis; 4 ferrule films; 5 bungees; 6 shafts are connected with post primer knot; 7 mud suspensions; 8 Metallic rod; 9 substrate dishes; 10 draining circular holes; 11 chassis internal threads; 12 thin-walled cutting ring strings; 13 heat-shrink tubes; 14 built-in retaining plugs; 15 handles; 16 set bolts.
Embodiment
In conjunction with Figure of description indoor settling column test simulation warp is further specified from resedimentation consolidation process test unit:
Mainly by settling leg (Fig. 1), form by slurry agitator (Fig. 2), microvariations soil sample soil sample barrel (Fig. 3) three parts from resedimentation consolidation process test unit for indoor settling leg simulation warp.The concrete making with operating process of test unit of the present invention is:
(1) make settling leg (Fig. 1), organic glass is made organic glass tube column body 1 respectively and is strengthened base 2, adopts the reliable shaft of the glued formation of organic binder bond to be connected 6 with post primer knot between the two.Plexi-glass tubular shaft 1 high 1000mm wherein, internal diameter 130mm, wall thickness 10mm; Strengthen base diameter 180mm, thickness 10mm; Plexi-glass tubular shaft 1 outer tube wall symmetry is pasted minimum scale 1mm paper chi, and fixes with adhesive tape.
(2) make slurry agitator (Fig. 2), the aluminium alloy material is made diameter 2mm, length 1200mm Metallic rod 8 and diameter 120mm, thickness 3mm substrate dish 9 respectively; Metallic rod 8 reliably is connected with substrate dish 9 through chassis internal thread 11; Symmetry is established four diameter 20mm draining circular holes on the substrate dish.
(3) make microvariations soil sample soil sample barrels (Fig. 3), adopt stainless pipe to make handle 15 and thin-walled cutting ring string 12, handle internal diameter 18mm, length 1000mm, single cutting ring internal diameter 18mm, wall thickness 0.5mm, height 10mm; 10 single cutting rings are fixing with solid plastic rod polyphone; With the heat-shrink tube outsourcing of heating, it is fastening that the back is shunk in cooling, extracts plastic rod more then; Through the fixing thin-walled cutting ring strings 12 that form of heat-shrink tube 13, and with handle 15 between be connected by the thermal shrinkage banding through heat-shrink tube 13; Built-in retaining plug 14 places the long 1000mm of thin metal rod of handle home record plug; Substrate dish diameter 17mm; Symmetry has the air hole of 4 diameter 2mm on the dish, and thin metal rod and substrate dish are with being threaded, and the handle upper end is with the relative position of the built-in retaining plug 14 of rotation adjusting up and down of set bolt 16.
(4) stirring machine is smashed undisturbed soil configuration test with concentration warp initial settlement mud suspension 7, shifts mud suspension 7 to plexi-glass tubular settling leg 1, and shaft is connected 6 places with post primer knot and has or not the infiltration phenomenon.
(5) slurry agitator (Fig. 2) inserts mud suspension 7, up and down reciprocatingly stirs 1～2min, stirs number of times and is no less than 30 times, stirs the end back and takes out stirrer, adds water to predetermined 950mm height.
(6) the shaft mouth of pipe covers diaphragm seal 4; And tighten sealing with bungee 5; Mud suspension 7 deadweight free setting processes begin, and according to plexi-glass tubular shaft 1 outer wall scale paper chi 3 read-records, put on record with the actual settling height file of the turbid liquid level of camera Taking Pictures recording in the settling process.
(5) after the fixed completion of mud suspension 7 sedimentations, with microvariations soil sample soil sample barrel (Fig. 3) in-situ sampling, the fixed soil sample void ratio of thin-walled cutting ring string 12 sampling and measuring different depths is by soil sample coefficient of consolidation c
vComputing formula is confirmed the actual coefficient of consolidation of warp.
Claims (4)
1. an indoor settling leg simulation warp deposits the consolidation process test unit; It is characterized in that this device comprises settling leg; Slurry agitator, microvariations soil sample soil sample barrel three parts are formed; Wherein settling leg is connected with base (2) by plexi-glass tubular shaft (1), and the shaft outer wall is symmetrical set scale paper chi (3), and the shaft mouth of pipe seals through bungee (5) colligation with diaphragm seal (4); Slurry agitator is fixedly connected with substrate dish (9) through screw thread by Metallic rod (8); Microvariations soil sample soil sample barrel by heat-shrink tube (13) fixedly thin-walled cutting ring string (12) be connected with metal handle (15), the set bolt on handle top (16) is connected with built-in retaining plug (14).
2. indoor settling leg simulation warp according to claim 1 deposits the consolidation process test unit, it is characterized in that the high 800～1200mm of plexi-glass tubular shaft (1) of described settling leg, wall thickness 8～12mm, internal diameter 100～130mm; Described base (2) is made for organic glass, thickness 10～15mm, diameter 150～180mm, and plexi-glass tubular shaft (1) is fixedly connected with organic gel with base (2).
3. according to right 1 described indoor settling leg simulation warp deposition consolidation process test unit, it is characterized in that Metallic rod (8) length 1000～1400mm of described slurry agitator, diameter 2～3mm is fixedly connected with substrate dish (9) through end thread; Substrate dish (9) diameter 90～120mm is symmetrical set four diameter 20～30mm draining circular holes (10), and there is an internal thread (11) in central authorities.
4. indoor settling leg simulation warp deposition consolidation process test unit according to claim 1; The thin-walled cutting ring string (12) that it is characterized in that said soil sample barrel is that the monocycle cutter with 10 aluminium alloys is connected on the solid plastic rod; Tighten after shrinking with the heat-shrink tube outsourcing cooling of heating then; Extract solid plastic rod again; Single cutting ring internal diameter 15～20mm, high 10～20mm, the relative position of set bolt (16) the built-in retaining plug of rotation adjusting (14) in handle (15) on described handle (15) top.
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| CN201010168502A CN101813690B (en) | 2010-05-11 | 2010-05-11 | Testing device for simulating warp self-weight settlement consolidation process by settlement column indoors |
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| CN102778553B (en) * | 2012-08-01 | 2014-10-15 | 北京师范大学 | Experimental device and method for measuring vertical distribution of beryllium-7 activity in soil profile |
| CN102967694B (en) * | 2012-08-13 | 2014-10-01 | 天津城市建设学院 | Microstructure parameter-based clay consolidation coefficient prediction method |
| CN106483251B (en) * | 2015-09-01 | 2018-07-24 | 中国科学院武汉岩土力学研究所 | A kind of mud deposition test acquires the method and device of sedimentary section in the process |
| CN105891453A (en) * | 2016-04-08 | 2016-08-24 | 山东建泽混凝土有限公司 | Device and method for testing apparent mass of bare concrete |
| EP3929580A1 (en) * | 2020-06-23 | 2021-12-29 | Yara International ASA | Method for determining soil texture |
| CN111896717B (en) * | 2020-09-22 | 2021-04-30 | 兰州理工大学 | Soil seepage-settlement testing method |
| CN113390771A (en) * | 2021-05-21 | 2021-09-14 | 浙江工业大学 | Indoor high-water-content dredged mud permeability test system and permeability test method |
| CN114486431B (en) * | 2022-01-18 | 2023-10-20 | 中国石油大学(北京) | Soil sample preparation device suitable for centrifuge experiment |
| CN115097109A (en) * | 2022-08-26 | 2022-09-23 | 矿冶科技集团有限公司 | Simulation experiment system and method for dead weight consolidation process of stope tailing filling slurry |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3640164A1 (en) * | 1986-11-25 | 1988-06-16 | Sarstedt Kunststoff | Sedimentometer |
| CN1831514A (en) * | 2005-03-10 | 2006-09-13 | 中南大学 | Osmotic coefficient investigating method and instrument |
| CN2919253Y (en) * | 2006-07-14 | 2007-07-04 | 长安大学 | Portable lever low-temperature concretion meter |
| CN101441209A (en) * | 2008-12-19 | 2009-05-27 | 河海大学 | Rapid triaxial consolidation shearing test method of soil body |
-
2010
- 2010-05-11 CN CN201010168502A patent/CN101813690B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3640164A1 (en) * | 1986-11-25 | 1988-06-16 | Sarstedt Kunststoff | Sedimentometer |
| CN1831514A (en) * | 2005-03-10 | 2006-09-13 | 中南大学 | Osmotic coefficient investigating method and instrument |
| CN2919253Y (en) * | 2006-07-14 | 2007-07-04 | 长安大学 | Portable lever low-temperature concretion meter |
| CN101441209A (en) * | 2008-12-19 | 2009-05-27 | 河海大学 | Rapid triaxial consolidation shearing test method of soil body |
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