CN202145154U - Plastic tube type stressometer - Google Patents
Plastic tube type stressometer Download PDFInfo
- Publication number
- CN202145154U CN202145154U CN 201120233894 CN201120233894U CN202145154U CN 202145154 U CN202145154 U CN 202145154U CN 201120233894 CN201120233894 CN 201120233894 CN 201120233894 U CN201120233894 U CN 201120233894U CN 202145154 U CN202145154 U CN 202145154U
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- outer tube
- foil gauge
- lead
- taseometer
- tube
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Abstract
The utility model relates to a stressometer, particularly to a plastic tube type stressometer. The plastic tube type stressometer is characterized by comprising an outer tube, with the tube wall of the outer tube being externally and fixedly provided with a plurality of foil gauges in a gluing manner, wherein the lower portions of the foil gauges are provided with holes; the foil gauges are connected with leads; the leads enter the interior of the outer tube via the holes in the lower portion of the foil gauges and lead out from the head end of the outer tube to connect with a measuring instrument; the foil gauges are uniformly fixed to the tube wall of the outer tube at same height via gluing; and the number of the leads is equal to that of the foil gauges, with each foil gauge being respectively and individually connected with a lead. The plastic tube type stressometer overcomes the defect of the prior art which can not rationally confirm the effective stake length.
Description
Technical field
The utility model relates to a kind of taseometer, particularly a kind of plastics tubular type taseometer.
Background technology
The advantage that composite foundation has economic actual effect has obtained widespread use in China.In the plain desert area of hair crow, application at present most often shake sand washing pile composite foundation, vibro-replacement stone pile composite foundation and cement mixing method composite foundation.These three types of pile body composite foundations have produced good social benefit and economic benefit applying of plain desert area of hair crow.Yet, since practice development rapidly and the present situation that theoretical research relatively lags behind make also very immature about the pile body Bearing Capacity of Composite Foundation theory of computation at present, especially its theory of pile body composite foundation in the aeolian sand stratum more seem extremely thin a little less than.Along with the sand washing stake of shaking, vibro-replacement stone column and cement mixing method composite foundation at present in the application gradually of the plain desert area of hair crow; Existing theory has not all caught up with the development of practice in many aspects; About pile body composite foundation design and construction just are based upon on the limited experiential basis mostly, therefore many in theory aspects also need constantly to strengthen exploring, research, development and raising.
As a kind of semi-rigid stake between flexible pile and rigid pile, cement mixing method and friction pile are similar, and the long problem of choosing of stake is also arranged.A significant problem need considering when effective length is cement mixing method composite foundation optimal design; From the bearing capacity angle; Effective length (claiming that again critical stake is long) is meant characteristic one timing of other conditions (shape of stake, sectional area size, pile shaft material etc.) and inter-pile soil, along with the also corresponding raising of characteristic load bearing capacity of the long increase stake of stake, but along with the long further increase of stake; The increase of pile body bearing capacity is gradually slow; When stake is long when surpassing a certain ultimate value, the increase of bearing capacity is almost nil, and this limiting length is called effective length.Because that part of pile body below the effective length can be ignored to the contribution of pile bearing capacity, therefore rationally confirm effective length, can avoid because of blindly increasing the long significant wastage that causes of stake.
Therefore need a kind of technology to confirm the effective length of cement mixing pile, make it can satisfy requirement of engineering, unlikely again long and cause waste.
The utility model content
The technical matters that the utility model will solve provides a kind of plastics tubular type taseometer, to overcome the defective that can not rationally confirm effective length that exists in the prior art.
The technical scheme of the utility model is: a kind of plastics tubular type taseometer is characterized in that: comprise outer tube, the tube wall external pasting of said outer tube is fixed with foil gauge, and below foil gauge, is provided with the hole; Said foil gauge is connected with lead, and it is inner that the hole of lead through foil gauge below gets into outer tube, and passes with surveying instrument from the outer tube head end and to link to each other.
Said foil gauge is a plurality of, the outer sustained height place of tube wall that evenly distributes and be pasted and fixed on outer tube; Said lead is many identical with foil gauge quantity, and each foil gauge is connected with every lead separately respectively.
Said foil gauge is a plurality of, is pasted and fixed on the outer differing heights place of tube wall of outer tube respectively; Said lead is many identical with foil gauge quantity, and each foil gauge is connected with every lead separately respectively.
The said foil gauge that is pasted and fixed on the outer sustained height place of tube wall of outer tube is equally distributed a plurality of.
Outer two of the tube wall of said outer tube is highly located to paste to be fixed with foil gauge; The foil gauge at the outer sustained height place of the tube wall of outer tube is four.
Said outer tube is many, and splice at the head and the tail two ends of per two outer tubes, and pastes fixing through the sleeve pipe of parcel jointing positions; The every inner lead of outer tube all passes from the head end of first outer tube.
Said foil gauge and lead junction scribble 703 glue, and the back is fastened with adhesive tape in that the glue solidifies.
Said foil gauge and lead junction scribble 703 glue, and the back is fastened with adhesive tape in that the glue solidifies.
Said outer tube is a polypropylene PP plastic outer tube; The foil gauge model is BE120-2AA, and resistance value is 119.8, and sensitivity coefficient is 2.18.
Said outer tube is a polypropylene PP plastic outer tube; The foil gauge model is BE120-2AA, and resistance value is 119.8, and sensitivity coefficient is 2.18; Outer external diameter of pipe is 50mm, and casing inner diameter is 52mm, and thickness of pipe is 2mm, and elastic modulus is 2.15 * 103Mpa.
The technique effect of the utility model is: the utility model is made simple, convenient, is easy to carry about with one, and has reusable characteristics; And through in test pile, burying the method for taseometer underground, can effectively measure the effective length of pile body,, and then important reference frame is provided for engineering practice so that the cement mixing method composite foundation is studied through load test.And measure the pile body effective length through load test, for engineering practice provides important evidence.
Be employed in the method for burying taseometer in the test pile underground; Through load test the research of the effective length of cement mixing method composite foundation had very large value; In carrying out the research of pile body composite foundation; It can effectively measure the effective length of pile body, for engineering practice provides important reference frame.
Description of drawings
Below in conjunction with the embodiment accompanying drawing utility model is further specified:
Fig. 1 is the utility model structural representation;
Fig. 2 is the partial enlarged drawing at A place among Fig. 1;
Fig. 3 is the variation relation curve of cement mixing method single pile actual measurement strain with load.
Reference numeral is following:
1. outer tube, 2. foil gauge, 3. hole, 4. sleeve pipe, 5. lead.
Embodiment
The concrete operating mode of the utility model basis a kind of measurement of design and assembly is voluntarily used taseometer, relates to the Geotechnical Engineering field, and practical application is very wide.The utility model also is suitable at other pile bodies that satisfy under following two kinds of situation: 1. modulus is close with this plastic tube; 2. be convenient to installation.The utility model patent is a plastics tubular type taseometer.Comprise foil gauge, polypropylene PP plastic outer tube, lead and sleeve pipe; Four foil gauges are one group, every group of outer sustained height place of tube wall that foil gauge is pasted and fixed on polypropylene PP plastic outer tube uniformly, and the tube wall external pasting of every root polypropylene PP plastic outer tube is fixed with some groups of foil gauges; The tube wall external pasting of polypropylene PP plastic outer tube fixedly all has the hole in the foil gauge below; Every lead and the independent conducting of each foil gauge; Every lead gets into polypropylene PP plastic outer tube inside through square hole under each foil gauge, and all leads pass from polypropylene PP plastic outer tube head end; Splice at the head and the tail two ends of per two root polypropylene PP plastic outer tubes, and fixing through the sleeve pipe stickup, and the inner lead of every root polypropylene PP plastic outer tube all passes from the head end of the first root polypropylene PP plastic outer tube.It is simple, convenient that this taseometer is made, and is easy to carry about with one, for engineering practice provides important reference frame.
The utility model structure is following:
A kind of plastics tubular type taseometer comprises outer tube 1, and the tube wall external pasting of said outer tube 1 is fixed with foil gauge 2, and below foil gauge 2, is provided with hole 3; Said foil gauge 2 is connected with lead 5, and lead 5 gets into plastic outer tubes 1 inside through the hole 3 of foil gauge 2 belows, and passes with surveying instrument from outer tube 1 head end and to link to each other.
Preferable mode for the tube wall of outer tube 1 outside two highly locate stickup and be fixed with foil gauge 2; The foil gauge 2 at the outer sustained height place of the tube wall of plastic outer tube 1 is four.
In the such scheme, foil gauge 2 can scribble 703 glue with lead 5 junctions, and the back is fastened with adhesive tape in that the glue solidifies.
Consider that modulus and pile body are more approaching, consider economy and processing technology simultaneously, said outer tube 1 optional plastic outer tube; Foil gauge 2 models are BE120-2AA, and resistance value is 119.8, and sensitivity coefficient is 2.18.
Plastic outer tube can be polypropylene PP plastic outer tube; Plastic outer tube 1 external diameter can be 50mm, and sleeve pipe 4 internal diameters can be 52mm, and thickness of pipe all can be 2mm, and elastic modulus can be 2.15 * 103Mpa.
Preferred embodiment:
Like Fig. 1, shown in Figure 2, for preventing that the same degree of depth from having the foil gauge necrosis to cause obtaining data conditions and occurring, four foil gauges 2 are one group, and (four spacings are proper, and are then overstocked too much.); Every group of outer sustained height place of tube wall that foil gauge 2 is pasted and fixed on polypropylene PP plastic outer tube (also can be the approaching similar plastics of modulus) uniformly; The tube wall external pasting of every root polypropylene PP plastic outer tube 1 is fixed with two groups of foil gauges 2 (if be one group; This degree of depth is with regard to unsure certificate so just in case foil gauge lost efficacy! Two groups are comparatively suitable, waste too too much, and because the plastic tube girth is limited, can not be crowded with, preferably be no more than three groups).Foil gauge 2 models are BE120-2AA, and resistance value is 119.8, and sensitivity coefficient is 2.18.The utility model length according to actual needs can arbitrarily be spliced, and is 10m such as the length of instance pile body, so just need 8, every length is 1.25m.The position relation is one of a butt joint, and the centre connects with sleeve pipe.
Fixing every group of foil gauge 2 belows of the tube wall external pasting of polypropylene PP plastic outer tube 1 all have hole 3; The size in hole is confirmed according to the wire diameter size; Every lead 5 and each foil gauge 2 independent conducting; Every lead 5 gets into polypropylene PP plastic outer tubes 1 inside through the hole below each foil gauge 4, and all leads 5 pass from polypropylene PP plastic outer tube 1 head end.Lead length is long according to the actual peg of treating, selectes in conjunction with convenient test.Like every conductor length is 20m; The instance stake is long to be 10m; The outside stays 10m to be used to guide to data acquisition system (DAS), and preceding 10m confirms that according to the long length of the stake that will survey back 10m confirms according to the distance of guiding to data acquisition system (DAS); Because data acquisition system (DAS) can move, after the length of 10m can change.Lacked very much and can cause inconvenient operation, oversizely then can cause unnecessary waste.Press for waterproof is anti-, foil gauge 2 scribbles 703 glue with lead 5 junctions, and the back is fastened with adhesive tape in that the glue solidifies.
Splice at the head and the tail two ends of per two root polypropylene PP plastic outer tubes 1, and fixing through sleeve pipe 4 stickups, and every root polypropylene PP plastic outer tube 1 inner lead 5 all passes from the head end of the first root polypropylene PP plastic outer tube 1.Polypropylene PP plastic outer tube 1 external diameter is 50mm, and sleeve pipe 4 internal diameters are 52mm (casing inner diameter is greater than polypropylene PP plastic outer tube external diameter), and thickness of pipe is 2mm, and elastic modulus is 2.15 * 103Mpa.
The use operating process of the utility model is following:
(1) is ready to some of " plastics tubular type " taseometers, because plastic tube poor thermal conductivity and linear expansion coefficient are big,, therefore adopts known half-bridge circuit, with the way solution of temperature compensation so Influence of Temperature is bigger than metal.
(2) excavate out the cement mixing method pile crown at the scene after,, then " plastics tubular type " taseometer is imbedded boring and holds until the stake end in pile center position boring (aperture 10cm) until stake, pour into the sand-cement slurry backfill at last.
(3) after the preloading of test pile top finishes; Begin to connect instrument, adopt DH3816 type static strain measuring instrument to measure, earlier lead is inserted the interface of instrument; Adopt half-bridge circuit, measure, again instrument is connected computer so that automatic record with the method for temperature compensation.Begin at last to load observe phenomena and record.
(4) through this kind method; Can effectively read out the strain data of test pile pile body intuitively at different depth; Can analyze thus test pile pile body in the load test different depth the STRESS VARIATION situation; As shown in Figure 3, one group of test figure that draws through the method for burying taseometer underground (cement mixing method single pile actual measurement strain is with the variation relation curve of load).Ordinate is represented the pile body degree of depth among Fig. 3, and the strain that on behalf of strainmeter, horizontal ordinate record can be used to calculated stress according to strain.In test, can record a curve under every grade of load, load 5 grades of loads (value has mark on curve) altogether, therefore 5 curves are arranged.
Claims (8)
1. plastics tubular type taseometer, it is characterized in that: comprise outer tube (1), the tube wall external pasting of said outer tube (1) is fixed with foil gauge (2), and is provided with hole (3) in foil gauge (2) below; Said foil gauge (2) is connected with lead (5), and lead (5) gets into outer tube (1) inside through the hole (3) of foil gauge (2) below, and passes with surveying instrument from outer tube (1) head end and to link to each other.
2. according to the said a kind of plastics tubular type taseometer of claim 1, it is characterized in that: said foil gauge (2) is for a plurality of, and evenly distribution is pasted and fixed on the outer sustained height place of tube wall of outer tube (1); Said lead (5) is many identical with foil gauge (2) quantity, and each foil gauge (2) is connected with every lead separately respectively.
3. according to the said a kind of plastics tubular type taseometer of claim 1, it is characterized in that: said foil gauge (2) is pasted and fixed on the outer differing heights place of tube wall of outer tube (1) respectively for a plurality of; Said lead (5) is many identical with foil gauge (2) quantity, and each foil gauge (2) is connected with every lead separately respectively.
4. according to the said a kind of plastics tubular type taseometer of claim 3, it is characterized in that: the said foil gauge (2) that is pasted and fixed on the outer sustained height place of tube wall of outer tube (1) is equally distributed a plurality of.
5. according to the said a kind of plastics tubular type taseometer of claim 4, it is characterized in that: outer two of the tube wall of said outer tube (1) is highly located to paste to be fixed with foil gauge (2); The foil gauge (2) at the outer sustained height place of the tube wall of outer tube (1) is four.
6. according to the said a kind of plastics tubular type taseometer of claim 1, it is characterized in that: said outer tube (1) is many, and splice at the head and the tail two ends of per two outer tubes (1), and pastes fixing through the sleeve pipe (4) of parcel jointing positions; The inner lead (5) of every outer tube (1) all passes from the head end of first outer tube.
7. according to the said a kind of plastics tubular type taseometer of claim 1, it is characterized in that: said foil gauge (2) and lead (5) junction scribble 703 glue, and the back is fastened with adhesive tape in that the glue solidifies.
8. require said a kind of plastics tubular type taseometer according to claim 1 profit, it is characterized in that: said outer tube (1) is a polypropylene PP plastic outer tube; Foil gauge (2) model is BE120-2AA, and resistance value is 119.8, and sensitivity coefficient is 2.18; Outer tube (1) external diameter is 50mm, and sleeve pipe (4) internal diameter is 52mm, and thickness of pipe is 2mm, and elastic modulus is 2.15 * 103Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120233894 CN202145154U (en) | 2011-07-05 | 2011-07-05 | Plastic tube type stressometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120233894 CN202145154U (en) | 2011-07-05 | 2011-07-05 | Plastic tube type stressometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202145154U true CN202145154U (en) | 2012-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120233894 Expired - Fee Related CN202145154U (en) | 2011-07-05 | 2011-07-05 | Plastic tube type stressometer |
Country Status (1)
| Country | Link |
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| CN (1) | CN202145154U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411711A (en) * | 2013-07-11 | 2013-11-27 | 南京航空航天大学 | Measuring device of tubular part inner wall processing stress and measuring method thereof |
| CN103743506A (en) * | 2014-01-16 | 2014-04-23 | 上海理工大学 | Load measuring device and measuring method thereof |
| CN105318824A (en) * | 2015-11-20 | 2016-02-10 | 安徽理工大学 | A method for measuring loose circles of surrounding rocks based on distributed resistance strain gauges |
| CN105735380A (en) * | 2016-04-14 | 2016-07-06 | 广州市建筑科学研究院有限公司 | Monitoring device and method for horizontal displacement and vertical sedimentation of foundation pit deep layer |
| CN109238526A (en) * | 2018-09-18 | 2019-01-18 | 西南交通大学 | A kind of resistance-strain type tubular pressure sensor and pressure field test method |
-
2011
- 2011-07-05 CN CN 201120233894 patent/CN202145154U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411711A (en) * | 2013-07-11 | 2013-11-27 | 南京航空航天大学 | Measuring device of tubular part inner wall processing stress and measuring method thereof |
| CN103411711B (en) * | 2013-07-11 | 2016-01-20 | 南京航空航天大学 | A kind of measurement mechanism of tubular member inwall machining stress and measuring method thereof |
| CN103743506A (en) * | 2014-01-16 | 2014-04-23 | 上海理工大学 | Load measuring device and measuring method thereof |
| CN103743506B (en) * | 2014-01-16 | 2016-03-23 | 上海理工大学 | A kind of load-measuring device and measuring method thereof |
| CN105318824A (en) * | 2015-11-20 | 2016-02-10 | 安徽理工大学 | A method for measuring loose circles of surrounding rocks based on distributed resistance strain gauges |
| CN105318824B (en) * | 2015-11-20 | 2018-07-10 | 安徽理工大学 | A kind of method that wall rock loosening ring is measured based on distributed resistance foil gauge |
| CN105735380A (en) * | 2016-04-14 | 2016-07-06 | 广州市建筑科学研究院有限公司 | Monitoring device and method for horizontal displacement and vertical sedimentation of foundation pit deep layer |
| CN105735380B (en) * | 2016-04-14 | 2018-09-14 | 广州市建筑科学研究院有限公司 | A kind of monitoring device and method of foundation pit deeply mixing cement-soil pile and Vertical Settlement |
| CN109238526A (en) * | 2018-09-18 | 2019-01-18 | 西南交通大学 | A kind of resistance-strain type tubular pressure sensor and pressure field test method |
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Legal Events
| 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: 20120215 Termination date: 20180705 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |