CN205538051U - Real -time test device of inflation soil expansion power - Google Patents
Real -time test device of inflation soil expansion power Download PDFInfo
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- CN205538051U CN205538051U CN201620131503.7U CN201620131503U CN205538051U CN 205538051 U CN205538051 U CN 205538051U CN 201620131503 U CN201620131503 U CN 201620131503U CN 205538051 U CN205538051 U CN 205538051U
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- ring
- permeable stone
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- retaining ring
- expansive force
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The utility model discloses a real -time test device of inflation soil expansion power, including the reaction frame, the consolidation apparatus, pressure sensor, data acquisition system, the reaction frame includes the base, two columns installed on the pedestal, the counter -force board, the nut, place the consolidation apparatus on the base of reaction frame, the consolidation apparatus includes the basin, the retaining ring, the hoop, the cutting ring, the lead ring, big permeable stone, little permeable stone, the retaining ring is arranged in the recess of bottom of gullet, lay big permeable stone in the retaining ring, the inflation soil soil sample that has the cutting ring is arranged in on the big permeable stone, the hoop is put between retaining ring and cutting ring, the lead ring cover is on the collar extension of cutting ring, place little permeable stone in the lead ring, in pressure sensor's the lower part embedding lead ring, upper surface and counter -force board bottom surface in close contact with, lower surface and little permeable stone in close contact with, pressure sensor and data acquisition system are connected, it is stressed to measuration pressure sensor in real time through data acquisition system, obtain the native bulging force produced in water absorption process of inflation. This device can keep expanding volume invariant of native sample, can accurately measuration obtains the bulging force of soil sample to obtain the bulging force time -histories curve of soil sample. This device simple structure, the test is convenient, and work efficiency is high.
Description
Technical field
This utility model relates to the test device of swelled ground laboratory test, is specifically related to the real-time test device of a kind of swelled ground expansive force.
Background technology
Swelled ground has the special engineering character such as swell-shrink characteristic, fissurity, overconsolidation, dramatically different with general cohesive soil.Swelled ground meets aquiform stool can produce volumetric expansion, and when dilatancy suffers restraints, swelled ground produces a counter-force expansive force to obligatory point.According to observation, expansive force is commonly greater than conventional soil pressure or subgrade reaction, and with repeatedly repeatability and long term latent so that the job facilities such as industry and building construction, railway, highway frequently suffer from heavy damage, therefore swelled ground is commonly referred to as " cancer in engineering ".
Expansive force is swelled ground area underground structure and the key index of retaining structure design, vital effect is played in determination for fundamentals such as version, size, arrangements of reinforcement, therefore in the geotechnical engineering investigation stage, the expansive force size of needs assessment swelled ground, and reported as precisely as possible determine.Expansive force is mainly obtained by laboratory test at present, and common testing methods has loading counterbalanced procedure, expands back-pressure method, expansion decompression method three kinds.Loading counterbalanced procedure is that be progressively further applied load maintenance constancy of volume when sample water suction starts to expand, until sample is finally stable at elemental height, taking final load is expansive force；Expand back-pressure method be make sample fully absorb water free wxpansion stable after be further applied load again and make it return to initial volume；Expansion decompression method is to be placed in water by sample, compresses, unload the most step by step under bigger load, and sample expands, and taking load corresponding when volume does not changes is expansive force.There are two common shortcomings in said method: generally requires artificial participation or control in (1) expansive force test process, the anthropic factors such as loading is not in time, applying pressure is excessive, rate of debarkation is excessive will certainly produce certain measurement error, affects the biggest on result of the test accuracy and precision；(2) size of final expansive force can only be obtained, it is impossible to expansive force rule over time after reaction swelled ground water suction.
Therefore, for the particularity of expansive force test, design a set of science, the real-time test device of swelled ground expansive force efficient, accurate has become a problem in the urgent need to address.
Summary of the invention
The purpose of this utility model is to provide the real-time test device of a kind of swelled ground expansive force, for the laboratory test of swelled ground, with the expansive force of accurate measurement soil sample, and can obtain the expansive force Changing Pattern with absorbent time.
This utility model reaches above-mentioned purpose by following technical solution:
nullA kind of real-time test device of swelled ground expansive force，Including reaction frame、Consolidation apparatus、Pressure transducer、Data collecting system，Reaction frame includes base、Column、Reaction plate、Nut，Consolidation apparatus is placed on the base of reaction frame，Consolidation apparatus includes tank、Retaining ring、Hoop、Cutting ring、Lead ring、Big permeable stone、Little permeable stone，Retaining ring is placed in the groove of bottom of gullet，Big permeable stone is laid in retaining ring，Swelled ground soil sample with cutting ring is placed on big permeable stone，Hoop is placed between retaining ring and cutting ring，Lead ring is enclosed within the collar extension of cutting ring，Little permeable stone is placed in lead ring，The bottom of pressure transducer embeds in lead ring，Upper surface is in close contact with reaction plate bottom surface，Lower surface is in close contact with little permeable stone，Pressure transducer is connected with data collecting system，By data collecting system real-time measurement pressure transducer pressure，Obtain swelled ground produced expansive force in water absorption course.
Described column uses turret head high intensity screw bolt.
The outside of described pressure transducer is circumferentially arranged with annular protruding rib.
Described tank preferentially selects copper product to make, and described base, column, reaction plate, nut, retaining ring, hoop, cutting ring, lead ring preferentially select stainless steel material to make, and described big permeable stone, little permeable stone preferentially select alumina material to make.
The beneficial effects of the utility model are:
(1) volume of swelled ground sample is from on-test to terminating, and remains constant, will not be disturbed by extraneous factor, can obtain the expansive force of soil sample with accurate measurement.
(2) employing data collecting system and pressure transducer can be with real-time measurement soil sample expansive forces, it is thus achieved that the expansive force time-history curves of soil sample, the expansive force law of development for study of various swelled ground provides a convenient way.
(3) this device simple structure, convenient test, required labour is little, and work efficiency is high.
Accompanying drawing explanation
Fig. 1 is the structural representation of the real-time test device of a kind of swelled ground expansive force described in the utility model.
Fig. 2 is the front view of reaction frame in Fig. 1.
Fig. 3 is the top view of reaction frame in Fig. 1.
Label in figure: 1-reaction frame, 2-tank, 3-retaining ring, the big permeable stone of 4-, 5-hoop, 6-cutting ring, 7-soil sample, 8-lead ring, the little permeable stone of 9-, 10-pressure transducer, 11-data collecting system, 12-base, 13-column, 14-reaction plate, 15-nut.
Detailed description of the invention
With embodiment, the technical solution of the utility model is described further below in conjunction with the accompanying drawings.
nullThe real-time test device of a kind of swelled ground expansive force of the present embodiment is as shown in Figure 1，A kind of real-time test device of swelled ground expansive force，Including reaction frame 1、Consolidation apparatus、Pressure transducer 10、Data collecting system 11，Reaction frame 1 includes base 12、Column 13、Reaction plate 14、Nut 15，Consolidation apparatus is placed on the base 12 of reaction frame 1，Consolidation apparatus includes tank 2、Retaining ring 3、Hoop 5、Cutting ring 6、Lead ring 8、Big permeable stone 4、Little permeable stone 9，Retaining ring 3 is placed in the groove bottom tank 2，Big permeable stone 4 is laid in retaining ring 3，Swelled ground soil sample 7 with cutting ring 6 is placed on big permeable stone 4，Hoop 5 is placed between retaining ring 3 and cutting ring 6，Lead ring 8 is enclosed within the collar extension of cutting ring 7，Little permeable stone 9 is placed in lead ring 8，The bottom of pressure transducer 10 embeds in lead ring 8，Upper surface is in close contact with reaction plate 14 bottom surface，Lower surface is in close contact with little permeable stone 9，Pressure transducer 10 is connected with data collecting system 11，By data collecting system 11 real-time measurement pressure transducer 10 pressure，Obtain swelled ground soil sample 7 produced expansive force in water absorption course.
The tank 2 of the present embodiment is copper thin-walled circular trough, internal diameter is 114.0mm, external diameter is 120.0mm, base plate thickness 10.0mm, wall thickness 3.0mm, high 50.0mm, plate upper surface is carved with 4 road grooves, the deepest 3.0mm of outermost, is used for fixing retaining ring 3, other 3 roads deep 1.0mm of groove, as the seepage channel of distilled water.
The retaining ring 3 of the present embodiment is stainless steel thin-wall annulus, and internal diameter is 83.0mm, and external diameter is 89.0mm, wall thickness 3.0mm, high 25.0mm.
The hoop 5 of the present embodiment is rustless steel L-type structure, is made up of annulus and annular protruding rib, and internal radius is 66.0mm, external diameter is 72.0mm, wall thickness 3.0mm, high 12.0mm, fin width 3.0mm, high 3.0mm, installing that hoop 5 is cutting ring 6 provides a space being sized for.
The cutting ring 6 of the present embodiment is stainless steel thin-wall annulus, and internal diameter is 61.8mm, and external diameter is 64.8mm, wall thickness 1.5mm, high 20.0mm.
The lead ring 8 of the present embodiment is rustless steel bayonet type thin wall circular, bayonet socket matches with cutting ring 6, internal diameter is 64.8mm, and external diameter is 67.8mm, wall thickness 1.5mm, high 4.0mm, the internal radius of bayonet socket upper end is 61.8mm, and external diameter is 67.8mm, wall thickness 3.0mm, high 12.0mm, lead ring is mainly used in installing little permeable stone 9 and pressure transducer 10.
The big permeable stone 4 of the present embodiment, little permeable stone 9 are aluminium oxide plectane, a diameter of 82.0mm of big permeable stone 4, thickness is 10.0mm, a diameter of 61.0mm of little permeable stone 9, thickness is 9.0mm, big permeable stone 4, little permeable stone 9 infiltration coefficient much larger compared with soil sample 7, it is ensured that in the water penetration in tank to soil sample 7.
The pressure transducer 10 of the present embodiment is rustless steel plectane with ribbing, circumferentially arranged with annular protruding rib outside plectane, the a diameter of 61.0mm of plectane, thickness is 10.0mm, fin width 2.0mm, high 2.0mm, the guarantee pressure transducer 10 that is disposed to of fin is in close contact with little permeable stone, and the weight of pressure transducer 10 all acts on lead ring 8, without little permeable stone 9 is produced certain pressure.
The data collecting system 11 of the present embodiment be Dynamic Data Acquiring analyze system, the Real-time Collection of expansive force data can be realized, store and analyze, and can arrange multiple passage realize multiple pressure transducer 10 synchronism detection work.
As shown in Figure 2 and Figure 3, the molectron that base 12 is rectangular slab and rib of the present embodiment, it is stainless steel material, the long 220.0mm of rectangle steel plate, wide 140.0mm, thick 10.0mm, rib height 10.0mm, wide 10.0mm, the hole of reserved a diameter of 10.5mm on base 12, for the installation of column 13.
The column 13 of the present embodiment uses turret head, high intensity, full thread M10 bolt, and screw rod is upward.
The reaction plate 14 of the present embodiment is rustless steel rectangular slab, long 220.0mm, wide 60.0mm, thick 10.0mm, and the hole of reserved a diameter of 10.5mm on reaction plate 14, for the installation of column 13.
The nut 15 of the present embodiment is M10 bolt matching nut, thick 5.0mm.
The soil sample 7 with cutting ring 6 of the present embodiment, upper and lower surface is respectively put a thin filter paper, is in close contact with big permeable stone 4, little permeable stone 9.
When using this utility model to carry out swelled ground expansive force real-time testing, its work process is:
(1) being first placed on the testing stand of level by reaction frame 1 base 12, two root posts 13 load in the preformed hole of base 12 upward and tighten with nut 15.
(2) tank 2 of consolidation apparatus is placed on base 12, retaining ring 3, big permeable stone 4, thin filter paper, hoop 5 is laid successively in tank 2, again the soil sample 7 with cutting ring 6 is put into hoop 5, firmly down press after pinning cutting ring 6 top, guarantee that soil sample 7 lower surface contacts with big permeable stone 4, putting thin filter paper, little permeable stone 9 successively at soil sample upper surface, and lead ring 8 is placed on cutting ring 6 collar extension, pressure transducer 10 is placed on lead ring 8.
(3) reaction plate 14 it is installed and fixes with nut 15, making reaction plate 14 holding level, to ensure that reaction plate 14 is in close contact with pressure transducer 10 upper surface, connect pressure transducer 10 and data collecting system 11.
(4) adding distilled water in tank 2, data collecting system 11 gathers the expansive force data of soil sample 7, until data variation value is less than 0.01kPa in 2 hours, i.e. it is believed that expand and keep stable, completes the test job of expansive force.
The description of above-described embodiment is merely to illustrate this utility model, rather than limits protection domain of the present utility model.
Claims (4)
- null1. the real-time test device of a swelled ground expansive force，It is characterized in that: include reaction frame、Consolidation apparatus、Pressure transducer、Data collecting system，Reaction frame includes base、Column、Reaction plate、Nut，Consolidation apparatus is placed on the base of reaction frame，Consolidation apparatus includes tank、Retaining ring、Hoop、Cutting ring、Lead ring、Big permeable stone、Little permeable stone，Retaining ring is placed in the groove of bottom of gullet，Big permeable stone is laid in retaining ring，Swelled ground soil sample with cutting ring is placed on big permeable stone，Hoop is placed between retaining ring and cutting ring，Lead ring is enclosed within the collar extension of cutting ring，Little permeable stone is placed in lead ring，The bottom of pressure transducer embeds in lead ring，Upper surface is in close contact with reaction plate bottom surface，Lower surface is in close contact with little permeable stone，Pressure transducer is connected with data collecting system，By data collecting system real-time measurement pressure transducer pressure，Obtain swelled ground produced expansive force in water absorption course.
- The real-time test device of a kind of swelled ground expansive force the most according to claim 1, it is characterised in that: described column uses turret head high intensity screw bolt.
- The real-time test device of a kind of swelled ground expansive force the most according to claim 1, it is characterised in that: the outside of described pressure transducer is circumferentially arranged with annular protruding rib.
- The real-time test device of a kind of swelled ground expansive force the most according to claim 1, it is characterized in that: described tank preferentially selects copper product to make, described base, column, reaction plate, nut, retaining ring, hoop, cutting ring, lead ring preferentially select stainless steel material to make, and described big permeable stone, little permeable stone preferentially select alumina material to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620131503.7U CN205538051U (en) | 2016-02-22 | 2016-02-22 | Real -time test device of inflation soil expansion power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620131503.7U CN205538051U (en) | 2016-02-22 | 2016-02-22 | Real -time test device of inflation soil expansion power |
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| CN205538051U true CN205538051U (en) | 2016-08-31 |
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| CN201620131503.7U Expired - Fee Related CN205538051U (en) | 2016-02-22 | 2016-02-22 | Real -time test device of inflation soil expansion power |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064474A (en) * | 2017-03-22 | 2017-08-18 | 青海大学 | A kind of swollen characteristic test apparatus of the salt of salinized soil |
| CN107422097A (en) * | 2017-05-23 | 2017-12-01 | 北京交通大学 | A kind of device for measuring soil solidifying performance and expansive force |
| CN108303283A (en) * | 2018-03-23 | 2018-07-20 | 西北农林科技大学 | A kind of portable grade topsoil stratified sampler and its operating method |
| CN108445182A (en) * | 2018-02-09 | 2018-08-24 | 安徽省金田建筑设计咨询有限责任公司 | Measure the experimental rig of sulfate-salinized soil expansive force |
| CN109141720A (en) * | 2018-10-18 | 2019-01-04 | 大连理工大学 | A kind of device measuring clay swell power |
| CN110018295A (en) * | 2019-05-29 | 2019-07-16 | 河南理工大学 | The test device and test method of lateral confinement expansive force in a kind of expansive rock hydration process |
-
2016
- 2016-02-22 CN CN201620131503.7U patent/CN205538051U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064474A (en) * | 2017-03-22 | 2017-08-18 | 青海大学 | A kind of swollen characteristic test apparatus of the salt of salinized soil |
| CN107422097A (en) * | 2017-05-23 | 2017-12-01 | 北京交通大学 | A kind of device for measuring soil solidifying performance and expansive force |
| CN107422097B (en) * | 2017-05-23 | 2023-09-12 | 北京交通大学 | Device for measuring soil consolidation performance and expansion force |
| CN108445182A (en) * | 2018-02-09 | 2018-08-24 | 安徽省金田建筑设计咨询有限责任公司 | Measure the experimental rig of sulfate-salinized soil expansive force |
| CN108303283A (en) * | 2018-03-23 | 2018-07-20 | 西北农林科技大学 | A kind of portable grade topsoil stratified sampler and its operating method |
| CN109141720A (en) * | 2018-10-18 | 2019-01-04 | 大连理工大学 | A kind of device measuring clay swell power |
| CN110018295A (en) * | 2019-05-29 | 2019-07-16 | 河南理工大学 | The test device and test method of lateral confinement expansive force in a kind of expansive rock hydration process |
| CN110018295B (en) * | 2019-05-29 | 2024-01-30 | 河南理工大学 | Testing device and testing method for lateral limit expansion force in expansion rock hydration process |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20170222 |
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| CF01 | Termination of patent right due to non-payment of annual fee |