CN205209677U - Dilatometer of bulging force is measured to permanent volumetric method - Google Patents
Dilatometer of bulging force is measured to permanent volumetric method Download PDFInfo
- Publication number
- CN205209677U CN205209677U CN201521091722.9U CN201521091722U CN205209677U CN 205209677 U CN205209677 U CN 205209677U CN 201521091722 U CN201521091722 U CN 201521091722U CN 205209677 U CN205209677 U CN 205209677U
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- China
- Prior art keywords
- screw rod
- cutting ring
- soil sample
- knob
- firm banking
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model discloses a dilatometer of bulging force is measured to permanent volumetric method relates to geotechnical engineering testing instrument. The structure of this dilatometer is that fixing system is connected with measurement system, fixing system include unable adjustment base, circular steel column, foraminiferous square crossbeam, knob, down the permeable stone, go up permeable stone, cutting ring stationary magazine creel, cutting ring, nut and gasket, measurement system include pressure sensor, digital display table, computer and amesdial. The utility model discloses have: 1. Soil sample volume invariant in whole process of the test has been guaranteed to permanent volume, 2. High accuracy, pressure sensor has precision height, advantage that the range is big, improves the precision of test result, 3. Wide region both had been applicable to and has measured the soil sample and soak the in -process and change with ambient temperature change of condition bulging force down, and the bulging force that also is applicable to under the temperature control is tested, 4. The structure is good, install convenient, easy and simple to handle, the data display is directly perceived.
Description
Technical field
The utility model relates to Geotechnical Engineering test apparatus, especially measures bulging force, is specifically related to the dilatometer that a kind of constant volume method measures bulging force, has been applicable to expansile soil.
Background technology
Swelled ground has distribution, widely dispersed in tens provinces and cities of China.In recent years; along with the development of national economy; China's engineering construction gets more and more; swelled ground problem is run into more and more outstanding in the process of construction of highway and channel; usually can cause the engineering project disaster such as subgrade deformation and slope instability; therefore, how the bulging force of Measurement accuracy swelled ground has very important significance.
Current bulging force measuring method has: expansion back-pressure method, balance pressurization method, pressurized expansion method and constant volume method.Expansion back-pressure method and pressurized expansion method also do not meet the definition that bulging force tests, and namely keep soil body constancy of volume in soil body water absorption course.And although balance pressurization method is close to its definition, be difficult in practical operation control, because be difficult in expansion process determine that applying how many loads on earth just just balances its volume.But a lot of research finds that the bulging force that unsaturated soil only records under the condition of constancy of volume just has physical significance and practical value; In view of the measuring method of existing constant volume method is difficult to reach constancy of volume, measured value is bigger than normal or less than normal.
The dilatometer that the utility model provides can keep sample body to become negligible, and utilize high-precision pressure sensor to improve the method for unsaturated soil bulging force measurement, thering is provided a new approach for measuring bulging force, providing trust reliable foundation for solving geotechnical engineering problems.Compare other several bulging force measuring methods, constant volume method, more can the accuracy of warranty test result and practicality closer to the bulging force of its reality.
Utility model content
The purpose of this utility model is the shortcoming and defect overcoming prior art existence, a kind of constant volume method is provided to measure the dilatometer of bulging force, namely in maintenance soil body constancy of volume situation, measure its bulging force, be applicable to all kinds of bulging force test with dilative soil.
The purpose of this utility model is achieved in that
This dilatometer comprises measurand---soil sample;
Be provided with fixed system and measuring system;
Soil sample is placed in fixed system;
Fixed system is connected with measuring system;
Described fixed system comprises firm banking, circular steel column, square beam with holes, knob, lower permeable stone, upper dankness stone, cutting ring stationary magazine creel, cutting ring, nut and pad;
Described firm banking is a kind of metal nahlock, along its central axis, from top to bottom, is disposed with apotheca, small circular groove and large circular groove; Mounting hole is vertically installed with respectively at firm banking the right and left; Before and after firm banking, both sides have been horizontally disposed with air admission hole and venthole respectively;
Described its top of circular steel column is provided with screw rod;
Described square beam with holes is a kind of steel square column, and its both sides are provided with mounting hole, and mounting hole is interior volution and adaptive with screw rod, and middle hole is interior volution and adaptive with screw rod;
Described knob is provided with screw rod and screw rod set collar, and screw rod set collar is a kind of metal ring, and its endoporus is volution and adaptive with screw rod;
Described cutting ring stationary magazine creel is a kind of steel drum being used for fixing cutting ring, its external diameter and large circular groove adaptation, and the external diameter of internal diameter and cutting ring is adaptive, is highly more than or equal to cutting ring;
Described cutting ring is the general steel instrument in a kind of laboratory, and its internal diameter is 61.8mm, is highly 20mm or 40mm;
Its position and annexation are:
Firm banking is connected by mounting hole with two circular steel columns, square beam with holes is placed on the screw rod above circular steel column, pad and nut are first placed on square beam with holes, and be enclosed within screw rod, lower permeable stone is placed in the small circular groove of base, cutting ring stationary magazine creel to be placed in large circular groove and on lower permeable stone, cutting ring is placed in cutting ring stationary magazine creel, soil sample is arranged in cutting ring, upper dankness stone is placed in soil sample, the screw rod of knob is vertically inserted in the middle of square beam with holes in hole, and screw rod Fixing shrink ring is on the screw rod of knob;
Described measuring system comprises pressure transducer, digital display meter, computing machine and clock gauge;
Its position and annexation are:
Pressure transducer is placed horizontally on upper dankness stone, the bottom close contact of the pressure cap on pressure transducer top and the screw rod of knob, and aims at its center; Pressure transducer, digital display meter are connected successively with computing machine, and clock gauge is vertically placed in the center on knob top.
Compared with prior art, the utility model tool has the following advantages and beneficial effect:
1. constant volume: utilize hold-down support and steel column to provide a restricted quarter, knob above square steel column can move up and down thus regulate fixing height, just no matter how high specimen height is for this, can ensure that pressure transducer just contacts with screw rod above, ensure that soil sample constancy of volume in whole process of the test.
2. high precision: the pressure transducer that the utility model adopts has that precision is high, range is large, profile is little, to conduct oneself with dignity the overall merits such as little, low price, pressure transducer bottom surface is smooth in addition, is convenient to the permeable stone be placed in above soil sample, and this just substantially increases practicality of the present utility model.
3. wide region: firm banking offers horizontal aperture, external hose, can ventilate, can water flowing, this just makes the utility model both be applicable to the bulging force change of measuring in soil sample immersion process, be applicable to again the bulging force change under the change of measures ambient humidity condition, be also applicable to the bulging force test under temperature control simultaneously, considerably increase usable range of the present utility model.
4. structure is good: for existing technology, and package unit volume is little, lightweight, precision is high, cost is low, and structure simple, convenient, easy and simple to handle, data intuitive display is installed.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of firm banking;
In figure:
00-soil sample;
10-fixed system,
11-firm banking,
111-air admission hole, 112-venthole, 113-mounting hole, 114-apotheca,
1151-small circular groove, 1152-large circular groove,
12-circular steel column,
121-screw rod,
13-square beam with holes,
14-knob,
141-screw rod set collar, 142-screw rod,
151-lower permeable stone, 152-upper dankness stone,
16-cutting ring stationary magazine creel,
17-cutting ring,
M1-nut,
D1-pad;
20-measuring system,
21-pressure transducer,
22-digital display meter,
23-computing machine,
24-clock gauge.
Embodiment
Describe in detail below in conjunction with drawings and Examples:
One, the structure of dilatometer
1, overall
As Fig. 1, this dilatometer comprises measurand---soil sample 00;
Be provided with fixed system 10 and measuring system 20;
Soil sample 00 is placed in fixed system 10;
Fixed system 10 is connected with measuring system 20.
2, functional part
0) soil sample 00
Soil sample 00 is undisturbed, compacting sample, hits full pattern or mud sample.
1) fixed system 10
As Fig. 1,2, fixed system 10 comprises firm banking 11, circular steel column 12, square beam with holes 13, knob 14, lower permeable stone 151, upper dankness stone 152, cutting ring stationary magazine creel 16, cutting ring 17, nut M1 and pad D1;
Described firm banking 11 is a kind of metal nahlocks, along its central axis, from top to bottom, is disposed with apotheca 114, small circular groove 1151 and large circular groove 1152; Mounting hole 113 is vertically installed with respectively at firm banking the right and left; Before and after firm banking, both sides have been horizontally disposed with air admission hole 111 and venthole 112 respectively;
Described its top of circular steel column 12 is provided with screw rod 121;
Described square beam with holes 13 is a kind of steel square columns, and its both sides are provided with mounting hole, and mounting hole is interior volution and adaptive with screw rod 121, and middle hole is interior volution and adaptive with screw rod 142;
Described knob 14 is provided with screw rod 142 and screw rod set collar 141, and screw rod set collar 141 is a kind of metal rings, and its endoporus is volution and adaptive with screw rod 142;
Described cutting ring stationary magazine creel 16 is a kind of steel drums being used for fixing cutting ring, its external diameter and large circular groove 1152 adaptation, and the external diameter of internal diameter and cutting ring 17 is adaptive, is highly more than or equal to cutting ring 17;
Described cutting ring 17 is the general steel instruments in a kind of laboratory, and its internal diameter is 61.8mm, is highly 20mm or 40mm;
Other functional parts above-mentioned are general part;
Its position and annexation are:
Firm banking 11 is connected by mounting hole 113 with two circular steel columns 12, square beam 13 with holes is placed on the screw rod 121 above circular steel column 12, pad D1 and nut M1 is first placed on square beam 13 with holes, and be enclosed within screw rod 121, lower permeable stone 151 is placed in the small circular groove 1151 of base 11, cutting ring stationary magazine creel 16 to be placed in large circular groove 1152 and on lower permeable stone 151, cutting ring 17 is placed in cutting ring stationary magazine creel 16, soil sample 00 is arranged in cutting ring 17, upper dankness stone 152 is placed in soil sample 00, the screw rod 142 of knob 14 is vertically inserted in the middle hole of square beam 13 with holes, screw rod set collar 141 is enclosed within screw rod 142.
2) measuring system 20
As Fig. 1, measuring system 20 comprises pressure transducer 21, digital display meter 22, computing machine 23 and clock gauge 24;
Its position and annexation are:
Pressure transducer 21 is placed horizontally on upper dankness stone 152, the bottom close contact of the pressure cap on pressure transducer 21 top and the screw rod 142 of knob 14, and aims at its center; Pressure transducer 21, digital display meter 22 are connected successively with computing machine 23, and clock gauge 24 is vertically placed in the center of knob 14 end face.
Pressure transducer 21, digital display meter 22, computing machine 23 and clock gauge 24 are general functional part.
3, working mechanism
1) working mechanism of fixed system 10 is:
Firm banking 11 is positioned on horizontal bed, firm banking 11, circular steel column 12 and square beam with holes 13 form a spatial skeleton, after fixing up and down, firm banking 11 and square beam 13 with holes can provide a fixed horizontal plane respectively, knob 14 can turn vertically, regulate and need fixing height, screw rod set collar 141 is for fixed knob 14, and overall formation one can regulate the fixed system of height.
2) working mechanism of measuring system 20 is:
On the one hand, with screw rod 142 close contact of knob 14 on pressure transducer 21, upper dankness stone 152 close contact down and above soil sample 00, once soil sample 00 absorbs water or moisture absorption, will expand, and soil sample 00 surrounding is restricted namely fixed, can only Expansion Potential be produced and extrude like this, lower permeable stone 152, 151, pressure reaches pressure transducer 21, pressure transducer 21 is squeezed, its actual pressure value reaches digital display meter 22 by data line, the dial plate of digital display meter 22 shows instant force value, the data of whole process all reach computing machine 23 by data line, add up, analyze and draw a diagram,
On the other hand, clock gauge 24 is placed in the center of knob 14 end face, measures the vertical displacement of knob 14 with this, thus reaches the object detecting constant volume method and dilatometer fiduciary level.
Two, using method
1, each part of inspection apparatus stands intact, and ensures the cleanliness of a whole set of instrument, is placed on by firm banking 11 on smooth testing table, vertically assigns in the mounting hole 113 of firm banking 11 by two circular steel columns 12 of band screw rod 121; The screw rod 121 of the mounting hole aligning steel column at square beam 13 two ends with holes vertically puts down, and level is laid; Pad D1 and nut M1 is successively put in the screw rod 121 on square beam 13 with holes, tightens and make crossbeam 13 fix and keep level.
2, lower permeable stone 151 is placed horizontally in small circular groove 1151; Cutting ring stationary magazine creel 16 be positioned over the top of lower permeable stone 151 and be placed in great circle connected in star 1152; Cutting ring 17 is placed in cutting ring stationary magazine creel 16, by the placement direction of cutting ring 17 be the edge of a knife upwards, style 00 is the soil sample or undisturbed soil sample that suppress in cutting ring 17 in advance, respectively puts a filter paper up and down; Upper dankness stone 152 is positioned over above soil sample 00, and makes its horizontal positioned.
3, pressure transducer 21 is placed horizontally on upper dankness stone 152, and makes pressure transducer 21 be put in the center of upper dankness stone 152; Pressure transducer 21 is by data line access digital display meter 22, and digital display meter 22 accesses computing machine 23 by data line and reads data.
4, the screw rod 142 of knob 14 is vertically inserted the middle hole of square beam 13 with holes, and turn knobs 14, make it to contact with the pressure cap of the upper end of pressure transducer 21, and allow the center of screw rod 142 bottom aim at the pressure cap of pressure transducer 21 upper end, avoid being partial to pressure; Open digital display meter 22, now digital display meter 22 dial plate can show initial pressure value 0, turn knobs 14 makes the further close contact of pressure cap of the upper end of screw rod 142 and pressure transducer 21, digital display meter 22 dial plate is made to show certain force value, such as 5kPa, record now reading, and digital display meter 22 is reset; Screw rod set collar 141 is enclosed within screw rod 142, and tightens and make screw rod set collar 141 and square beam 13 close contact with holes; Clock gauge 24 is positioned over the center above knob 14, make the vertical alignment knob center of the pointer of clock gauge 24, and give a starting force, an indicators turn 5-10 scale division value as large in clock gauge 24, to ensure that clock gauge 24 pointer contacts with knob 14, then clock gauge 24 is made zero, measure the displacement that knob 14 vertically rises, verify the fiduciary level of constant volume method and dilatometer with this.
The external rubber hose of air admission hole 111, as the passage providing source of the gas (relative humidity) or water source; The external rubber hose of venthole 112, as the passage that source of the gas or water source flow out; When the relative humidity in apotheca 114 changes and apotheca 114 relative humidity is greater than the relative humidity of soil sample, soil sample 00 meeting moisture absorption, thus produce expansion, pressure transducer 21 can be subject to the extruding of the soil body and experience the pressure transmitted from the soil body 00, show current shown bulging force by digital display meter 22, record whole pressure process changing value by computing machine 23 and draw corresponding chart.
Claims (1)
1. constant volume method measures a dilatometer for bulging force, comprises measurand---soil sample (00);
It is characterized in that: be provided with fixed system (10) and measuring system (20);
Soil sample (00) is placed in fixed system (10);
Fixed system (10) is connected with measuring system (20);
Described fixed system (10) comprises firm banking (11), circular steel column (12), square beam with holes (13), knob (14), lower permeable stone (151), upper dankness stone (152), cutting ring stationary magazine creel (16), cutting ring (17), nut (M1) and pad (D1);
Described firm banking (11) is a kind of metal nahlock, along its central axis, from top to bottom, is disposed with apotheca (114), small circular groove (1151) and large circular groove (1152); Mounting hole (113) is vertically installed with respectively at firm banking (11) the right and left; Before and after firm banking (11), both sides have been horizontally disposed with air admission hole (111) and venthole (112) respectively;
Described circular steel column (12) its top is provided with screw rod (121);
Described square beam with holes (13) is a kind of steel square column, and its both sides are provided with mounting hole, and mounting hole is interior volution and adaptive with screw rod (121), and middle hole is interior volution and adaptive with screw rod (142);
Described knob (14) is provided with screw rod (142) and screw rod set collar (141), and screw rod set collar (141) is a kind of metal ring, and its endoporus is volution and adaptive with screw rod (142);
Described cutting ring stationary magazine creel (16) is a kind of steel drum being used for fixing cutting ring, its external diameter and large circular groove (1152) adaptation, and the external diameter of internal diameter and cutting ring (17) is adaptive, is highly more than or equal to cutting ring (17);
Described cutting ring (17) is the general steel instrument in a kind of laboratory, and its internal diameter is 61.8mm, is highly 20mm or 40mm;
Its position and annexation are:
Firm banking (11) is connected by mounting hole (113) with two circular steel columns (12), square beam with holes (13) is placed on the screw rod (121) of circular steel column (12) top, pad (D1) and nut (M1) are first placed on square beam with holes (13), and be enclosed within screw rod (121), lower permeable stone (151) is placed in the small circular groove (1151) of base (11), cutting ring stationary magazine creel (16) to be placed in large circular groove (1152) and on lower permeable stone (151), cutting ring (17) is placed in cutting ring stationary magazine creel (16), soil sample (00) is arranged in cutting ring (17), upper dankness stone (152) is placed in soil sample (00), the screw rod of knob (14) is vertically inserted in the middle hole of square beam with holes, screw rod set collar (141) is enclosed within screw rod (142),
Described measuring system (20) comprises pressure transducer (21), digital display meter (22), computing machine (23) and clock gauge (24);
Its position and annexation are:
Pressure transducer (21) is placed horizontally on upper dankness stone (152), the pressure cap on pressure transducer (21) top and the bottom close contact of screw rod (142), and aims at its center; Pressure transducer (21), digital display meter (22) are connected successively with computing machine (23), and clock gauge (24) is vertically placed in the center on knob (14) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521091722.9U CN205209677U (en) | 2015-12-24 | 2015-12-24 | Dilatometer of bulging force is measured to permanent volumetric method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521091722.9U CN205209677U (en) | 2015-12-24 | 2015-12-24 | Dilatometer of bulging force is measured to permanent volumetric method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205209677U true CN205209677U (en) | 2016-05-04 |
Family
ID=55847386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521091722.9U Expired - Fee Related CN205209677U (en) | 2015-12-24 | 2015-12-24 | Dilatometer of bulging force is measured to permanent volumetric method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205209677U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571758A (en) * | 2015-12-24 | 2016-05-11 | 桂林理工大学 | Dilatometer for measuring expansive force by constant volume method |
| CN106092745A (en) * | 2016-06-06 | 2016-11-09 | 长沙理工大学 | Method and device for loaded expansion test |
| CN106907984A (en) * | 2017-04-12 | 2017-06-30 | 苏州瑞美科材料科技有限公司 | A kind of flatness test device |
| CN106969687A (en) * | 2017-04-06 | 2017-07-21 | 苏州瑞美科材料科技有限公司 | A kind of slide clearance test device |
| CN108663270A (en) * | 2018-03-30 | 2018-10-16 | 青岛理工大学 | Soft rock lateral expansibility apparatus |
| CN111638318A (en) * | 2020-06-12 | 2020-09-08 | 安徽理工大学 | Swelling soil no-load expansion rate and expansive force combined measuring device |
-
2015
- 2015-12-24 CN CN201521091722.9U patent/CN205209677U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571758A (en) * | 2015-12-24 | 2016-05-11 | 桂林理工大学 | Dilatometer for measuring expansive force by constant volume method |
| CN105571758B (en) * | 2015-12-24 | 2019-01-25 | 桂林理工大学 | The dilatometer of constant volume method measurement expansive force |
| CN106092745A (en) * | 2016-06-06 | 2016-11-09 | 长沙理工大学 | Method and device for loaded expansion test |
| CN106969687A (en) * | 2017-04-06 | 2017-07-21 | 苏州瑞美科材料科技有限公司 | A kind of slide clearance test device |
| CN106907984A (en) * | 2017-04-12 | 2017-06-30 | 苏州瑞美科材料科技有限公司 | A kind of flatness test device |
| CN108663270A (en) * | 2018-03-30 | 2018-10-16 | 青岛理工大学 | Soft rock lateral expansibility apparatus |
| CN111638318A (en) * | 2020-06-12 | 2020-09-08 | 安徽理工大学 | Swelling soil no-load expansion rate and expansive force combined measuring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yan Rongtao Inventor after: Wen Songsong Inventor after: Liang Weiyun Inventor after: Chen Yongjian Inventor after: He Jintang Inventor after: Yang Dehuan Inventor after: Wei Changfu Inventor before: Wen Songsong Inventor before: Liang Weiyun Inventor before: Chen Yongjian Inventor before: He Jintang Inventor before: Yang Dehuan Inventor before: Yan Yongtao Inventor before: Wei Changfu |
|
| COR | Change of bibliographic data | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160504 Termination date: 20191224 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |