CN101769710A - Settlement measuring device inside soil body - Google Patents
Settlement measuring device inside soil body Download PDFInfo
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- CN101769710A CN101769710A CN201010039584A CN201010039584A CN101769710A CN 101769710 A CN101769710 A CN 101769710A CN 201010039584 A CN201010039584 A CN 201010039584A CN 201010039584 A CN201010039584 A CN 201010039584A CN 101769710 A CN101769710 A CN 101769710A
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- settlement
- displacement transducer
- corrugated tube
- soil body
- steel pipe
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Abstract
The invention discloses a settlement measuring device inside soil body. An LVDT displacement transducer is arranged in an upper end hole of a steel tube, and a lead is led out of the steel tube. The fit clearance part between the displacement transducer and the steel tube is filled by a plastic protective film. A metal bottom plate is arranged inside a lower end hole of the steel tube. The top of a probe of the displacement transducer probe is provided with a nut, and a spring is sleeved outside the probe. The nut on the top of the probe can be supported on the lower end face of a settlement plate, and a corrugated tube is sleeved outside the spring. One end of the corrugated tube is fixed on an outer cylindrical surface of the upper end of the steel tube, and the other end of the corrugated tube is arranged on the lower end face of the settlement plate. The integral burying is adopted, the lead is led out of a side face of the top layer, and layered compaction construction of the backfilled soil body is not influenced. Due to the adoption of the displacement transducer, the settlement amount can be quickly and accurately measured in real time, and remote transmission, automatic measurement and long-term observation can be realized. The settlement measuring device inside the soil body has the advantages of simple structure and simple operation and can be recycled. The settlement measuring device inside the soil body is applied to geotechnical model tests and in-situ settlement measurement for foundation and roadbed.
Description
Technical field
The present invention relates to a kind of proving installation of Geotechnical Engineering technology, be specifically related to a kind of inside soil body sedimentation proving installation.
Background technology
To the measuring method of inside soil body sedimentation, main a kind of home position testing method is that a circular sedimentation pipe is anchored to basement rock, and magnet ring is enclosed within the sedimentation pipe periphery, is embedded in each observation aspect position at present.When the soil body was subjected to displacement, magnet ring can sedimentation pipe can not sink with soil body displacement, and magnet ring then produces along the sedimentation tubular axis and moves, and by the relative slippage of measuring and calculating magnet ring with sedimentation pipe, realized measuring purpose.There is following shortcoming in this method: 1, the sedimentation pipe burial place can not compaction treatment, near the sedimentation pipe soil body with from sedimentation pipe at a distance soil mass property there are differences, cause measuring error; Must from the hole of sedimentation pipe, put down the just position of energy measurement magnet ring of magnetic probe when 2, detecting, can only manual measurement, low precision, workload is big, and efficient is low.
Through the prior art literature search is found, Chinese patent application numbers 200420035072.1, title: delaminating deposition instrument, publication number: CN2685821, open date: 2005.03.16, it " has adopted the electrical measurement displacement transducer, can be have quickly and accurately directly measured settling amount in real time ", but its device: 1, the testing tool volume greatly and comparatively complicated, cost is higher; 2, measure the on-the-spot test that is primarily aimed at roadbed, the scope of application is little.
Chinese patent application numbers 200810037407.6, title: soil body internal deformation testing device, publication number: CN101270972A, open date: 2008.9.24, its " simple in structure; easy to process; simple to operate; as to be applied to geotechnical model test test; can convenient test inside soil body sedimentation situation; that measurement structure accurately and reliably ", but it has following shortcoming: when the tamping in layers construction of the backfill soil body need be carried out in the proving installation top, can influence preparation of soil sample quality and preparation efficiency, and can influence other test unit laying, bring adverse effect to model test, so more limitation is arranged in the practical application.
Chinese patent application numbers 200720173516.1, title: a kind of settlement plate and assembled delaminating deposition device, publication number: CN201094020Y, open date: 2008.7.30, this apparatus structure are comparatively complicated, and making and difficulty of processing are big, still need artificial reading, can not gather in real time, operating process is loaded down with trivial details, is of limited application.
Summary of the invention
At the deficiencies in the prior art, the invention provides a kind of settlement measuring device inside soil body, be applied to geotechnical model test or on-the-spot test, solved can't convenient test inside soil body sedimentation situation a difficult problem.
The present invention solves the technical scheme that above technical matters adopts:
The present invention includes settlement plate, LVDT displacement transducer, spring, corrugated tube, steel pipe, metal base plate; The LVDT displacement transducer is installed in the upper end hole of steel pipe; sensor conductor is drawn from steel pipe; the tolerance clearance of LVDT displacement transducer and steel pipe partly adopts the plastic protective film for plastics filling; in the following stomidium of steel pipe metal base plate is housed; the top of LVDT displacement transducer chaining pin is provided with nut; spring housing is outside chaining pin; the nut on chaining pin top can withstand on the settlement plate lower surface; corrugated tube is enclosed within outside the spring; one end of corrugated tube be fixed on steel pipe upper end external cylindrical surface on, the other end of corrugated tube is installed in the settlement plate lower surface.
Described settlement plate is circular flat board or square plate, and the corrugated tube length that the below connects is all elongated length greater than chaining pin; The internal diameter of corrugated tube is greater than outer diameter of steel pipes.
Compare with background technology, the beneficial effect that the present invention has is:
1, the present invention adopts integral body to bury underground, and lead is drawn from the top layer side, can not influence the compaction in layers construction of the backfill soil body.
2, the present invention adopts the LVDT displacement transducer, can measure settling amount fast, accurately, in real time.
3, the present invention can realize remote transmission, measurement and long-term observation automatically.
4, the present invention is simple in structure, easy to process, simple to operate, can realize recycling and reusing.
5, the present invention measures applied widelyly, is not only applicable to geotechnical model test, can also be applied to the on-the-spot settlement measurement of ground, roadbed.
Description of drawings
Fig. 1 is a structural principle synoptic diagram of the present invention.
Fig. 2 is a connecting pipe structure enlarged diagram of the present invention.
Among the figure: 1, settlement plate, 2, the LVDT displacement transducer, 3, nut, 4, bolt, 5, chaining pin, 6, spring, 7, sensor conductor, 8, corrugated tube, 9, steel pipe, 10, plastic protective film for plastics, 11, hoop, 12, metal base plate.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
As shown in Figure 1 and Figure 2, the present invention includes settlement plate 1, LVDT displacement transducer 2, spring 6, corrugated tube 8, steel pipe 9, metal base plate 12; LVDT displacement transducer 2 is installed in the upper end hole of steel pipe 9; and with hoop 11; nut 3 and bolt 4 are fixing; sensor conductor 7 is drawn from steel pipe 9; LVDT displacement transducer 2 partly adopts plastic protective film for plastics 10 fillings with the tolerance clearance of steel pipe 9; in the following stomidium of steel pipe 9 metal base plate 12 is housed; the top of LVDT displacement transducer chaining pin 5 is provided with nut 3; spring 6 is enclosed within outside the chaining pin 5; the nut 3 on chaining pin 5 tops can withstand on settlement plate 1 lower surface; corrugated tube 8 is enclosed within outside the spring 6; one end of corrugated tube 8 be fixed on steel pipe 9 upper end external cylindrical surfaces on; the other end of corrugated tube 8 is installed in settlement plate 1 lower surface; corrugated tube 8 connects steel pipe 9, and connected mode all adopts bonding or glued.
Described settlement plate 1 is circular flat board or square plate, and corrugated tube 8 length that the below connects are all elongated length greater than chaining pin 5; The internal diameter of corrugated tube 8 is greater than steel pipe 9 external diameters.
Integral body of the present invention is buried underground, requires metal base plate 12 to touch horizon d or structure (rigidity and intensity much larger than soil layer) on every side, adopts connecting pipe during curtailment, and hoop 11 is fixing, is threaded.
Using method of the present invention is:
When geotechnical model test test or on-the-spot test, earlier LVDT displacement transducer 2, settlement plate 1, spring 6, corrugated tube 8, steel pipe 9 are assembled into an integral body, the length of connecting pipe is decided apart from the distance of horizon d or structure according to measuring point.Pore-forming in design point position soil, then connecting pipe and integral body of the present invention are buried underground, metal base plate 12 touches horizon d or structure, sensor conductor 7 passes along settlement plate 1 all sides from steel pipe 9 and draws, when the soil body sinks, settlement plate 1 sinks synchronously with the soil body, the nut 3 on compressing chaining pin 5 tops, settlement plate 1 lower surface, make spring 6 compression deformations, chaining pin 5 shortens, LVDT displacement transducer 2 is transferred to ground surveying instrument with its signal that records by sensor conductor 7, can obtain measurement data, realizes measuring purpose.Corrugated tube 8 and steel pipe 9 are isolated the LVDT displacement transducer 2 and the test soil body, avoid displacement transducer 2 and surrounding soil to influence each other.
The present invention adopts and different designs such as traditional settlement plate and magnetic inductive delaminating deposition instrument, the LVDT displacement transducer is inverted is used, and can not influence the tamping in layers construction of the settlement plate top backfill soil body; Simultaneously, this apparatus structure is simple, easy to process, simple to operate, real time data acquisition, test result accurately and reliably, also can realize recycling and reusing, be applicable to geotechnical model test test and on-the-spot test, be with a wide range of applications.
The above only is the schematic embodiment of the present invention, can not limit scope of the invention process with it.So the amplification of its equivalent assemblies is dwindled, displacement, or, all still belong to the covering scope of claims of the present invention according to equivalent variations and modification that protection domain of the present invention is done.
Claims (2)
1. a settlement measuring device inside soil body is characterized in that, comprises settlement plate (1), LVDT displacement transducer (2), spring (6), corrugated tube (8), steel pipe (9), metal base plate (12); LVDT displacement transducer (2) is installed in the upper end hole of steel pipe (9); sensor conductor (7) is drawn from steel pipe (9); LVDT displacement transducer (2) partly adopts plastic protective film for plastics (10) filling with the tolerance clearance of steel pipe (9); metal base plate (12) is housed in the following stomidium of steel pipe (9); the top of LVDT displacement transducer chaining pin (5) is provided with nut (3); spring (6) is enclosed within outside the chaining pin (5); the nut (3) on chaining pin (5) top can withstand on settlement plate (1) lower surface; corrugated tube (8) is enclosed within outside the spring (6); one end of corrugated tube (8) be fixed on steel pipe (9) upper end external cylindrical surface on, the other end of corrugated tube (8) is installed in settlement plate (1) lower surface.
2. according to claims 1 described a kind of settlement measuring device inside soil body, it is characterized in that: described settlement plate (1) is circular flat board or square plate, and corrugated tube (8) length that the below connects is all elongated length greater than chaining pin (5); The internal diameter of corrugated tube (8) is greater than steel pipe (9) external diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010039584A CN101769710A (en) | 2010-01-08 | 2010-01-08 | Settlement measuring device inside soil body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010039584A CN101769710A (en) | 2010-01-08 | 2010-01-08 | Settlement measuring device inside soil body |
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| CN101769710A true CN101769710A (en) | 2010-07-07 |
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| CN201010039584A Pending CN101769710A (en) | 2010-01-08 | 2010-01-08 | Settlement measuring device inside soil body |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162234A (en) * | 2010-12-27 | 2011-08-24 | 北京工业大学 | Device and method for monitoring surface displacement of rock-soil body in real time |
| CN102168942A (en) * | 2011-01-06 | 2011-08-31 | 中国科学院武汉岩土力学研究所 | Coursed deformation measurement method capable of eliminating sedimentation pipe influence |
| CN103196423A (en) * | 2013-04-01 | 2013-07-10 | 水利部交通运输部国家能源局南京水利科学研究院 | Settlement ring for precise self-positioning of layered settlement monitoring system and use method of settlement ring |
| CN103776417A (en) * | 2014-01-14 | 2014-05-07 | 中国科学院寒区旱区环境与工程研究所 | Device for measuring cryolithozone stratum deformation |
| CN103953025A (en) * | 2014-05-13 | 2014-07-30 | 水利部交通运输部国家能源局南京水利科学研究院 | Equipment for measuring layered settlement of deep soft soil or blanket and setup method thereof |
| CN107436139A (en) * | 2016-05-26 | 2017-12-05 | 中交第航务工程局有限公司 | Marine jackstone dike sedimentation and the measurement apparatus and its measuring method of jackstone thickness |
| CN109631832A (en) * | 2018-12-10 | 2019-04-16 | 中交天津港湾工程研究院有限公司 | A kind of soil body delaminating deposition quantity monitoring method |
-
2010
- 2010-01-08 CN CN201010039584A patent/CN101769710A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162234A (en) * | 2010-12-27 | 2011-08-24 | 北京工业大学 | Device and method for monitoring surface displacement of rock-soil body in real time |
| CN102162234B (en) * | 2010-12-27 | 2012-10-31 | 北京工业大学 | Device and method for monitoring surface displacement of rock-soil body in real time |
| CN102168942A (en) * | 2011-01-06 | 2011-08-31 | 中国科学院武汉岩土力学研究所 | Coursed deformation measurement method capable of eliminating sedimentation pipe influence |
| CN102168942B (en) * | 2011-01-06 | 2012-07-18 | 中国科学院武汉岩土力学研究所 | Coursed deformation measurement method capable of eliminating sedimentation pipe influence |
| CN103196423A (en) * | 2013-04-01 | 2013-07-10 | 水利部交通运输部国家能源局南京水利科学研究院 | Settlement ring for precise self-positioning of layered settlement monitoring system and use method of settlement ring |
| CN103196423B (en) * | 2013-04-01 | 2015-09-23 | 水利部交通运输部国家能源局南京水利科学研究院 | The sedimentation ring accurately self-align for deep soil settlement survey system and using method thereof |
| CN103776417A (en) * | 2014-01-14 | 2014-05-07 | 中国科学院寒区旱区环境与工程研究所 | Device for measuring cryolithozone stratum deformation |
| CN103953025A (en) * | 2014-05-13 | 2014-07-30 | 水利部交通运输部国家能源局南京水利科学研究院 | Equipment for measuring layered settlement of deep soft soil or blanket and setup method thereof |
| CN103953025B (en) * | 2014-05-13 | 2015-10-28 | 水利部交通运输部国家能源局南京水利科学研究院 | Measure equipment and the method to set up thereof of Deep Thick Soft Ground or covering layer delaminating deposition |
| CN107436139A (en) * | 2016-05-26 | 2017-12-05 | 中交第航务工程局有限公司 | Marine jackstone dike sedimentation and the measurement apparatus and its measuring method of jackstone thickness |
| CN109631832A (en) * | 2018-12-10 | 2019-04-16 | 中交天津港湾工程研究院有限公司 | A kind of soil body delaminating deposition quantity monitoring method |
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Open date: 20100707 |