CN104697493A - Underground preloading settlement monitoring system - Google Patents
Underground preloading settlement monitoring system Download PDFInfo
- Publication number
- CN104697493A CN104697493A CN201510085118.3A CN201510085118A CN104697493A CN 104697493 A CN104697493 A CN 104697493A CN 201510085118 A CN201510085118 A CN 201510085118A CN 104697493 A CN104697493 A CN 104697493A
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- pressure sensor
- monitoring system
- sedimentation
- receiving terminal
- vibrating wire
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
Abstract
The invention relates to the technical field of geotechnical engineering monitoring, and discloses an underground preloading settlement monitoring system, which is arranged in a to-be-detected foundation soil layer and comprises a testing hole, a fixed rod, a signal cable, a settling tray, a liquid storage tank, a vibration wire type pressure sensor and a data receiving terminal, wherein the testing hole is formed in the to-be-detected foundation soil layer and the lower end of the testing hole stretches into a stable soil layer; the fixed rod is arranged in the testing hole and the lower end of the fixed rod is connected to the stable soil layer; the vibration wire type pressure sensor is arranged on the fixed rod; the settling tray is arranged in an orifice in the upper end of the testing hole; the liquid storage tank is arranged on the lower surface of the settling tray; a pressure pipe is connected o the liquid storage tank; the vibration wire type pressure sensor is connected to the tail end of the pressure pipe; and the data receiving terminal is in communication with and connection with the vibration wire type pressure sensor so as to acquire an electric signal of the vibration wire type pressure sensor. The settlement monitoring system disclosed by the invention is free of influence on the construction and traffic capacity of surface boats, and is safe and high in stability.
Description
Technical field
The present invention relates to Geotechnical Engineering monitoring technical field, particularly relate to one piling prepressing sedimentation monitoring system under water.
Background technology
Soft Ground often adopts preloading under water, and in piling prepressing process, the sedimentation situation of foundation soil evaluates important role to the determination of piling prepressing discharge time and precompressed process groundwork soil consolidation effect.At present, the ground settlement observation of piling prepressing mostly first buries sedimentation plate underground in stabilization zone, is grasped the sedimentation situation on earth's surface by spirit-leveling instrument periodic observation; Soil body delaminating deposition is observed by soil body laminated settlement meter, bury pvc pipe underground at the soil body, magnet ring is set at pvc pipe higher slice, the probe of laminated settlement meter is put into pvc pipe, pop one's head in by electromagnetic induction principle mensuration magnet ring position, and then the sedimentation situation of change of magnet ring position soil layer can be determined.
Above-mentioned settlement observation method large-scale application in land preloading method basement process, but in preloading construction, ground settlement dish and laminated settlement meter all need to surface and can observe under water, if but all surface, water craft construction must be affected, pass through, and in the marine environment that depth of water wave is anxious, monitoring instrument is easy to impaired, and measuring accuracy is also difficult to ensure in addition.
Summary of the invention
(1) technical matters that will solve
The object of the invention is how to provide a kind of construction on above water craft and current not impact, the sedimentation monitoring system of piling prepressing under water that safety, stability are high.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides one piling prepressing sedimentation monitoring system under water, be arranged at foundation soil to be measured, comprise: instrument connection, fixed bar, signal cable, sedimentation plate, fluid reservoir, vibrating wire pressure sensor and data receiving terminal, described instrument connection is located at described foundation soil to be measured, and steady soil is goed deep in its lower end; Described fixed bar is placed in described instrument connection, and its lower end is connected with described steady soil; Described vibrating wire pressure sensor is located at described fixed bar, described sedimentation plate is located at the aperture, upper end of described instrument connection, described fluid reservoir is installed on the lower surface of described sedimentation plate, and described fluid reservoir connects a force pipe, and the end of described force pipe connects described vibrating wire pressure sensor; Described data receiving terminal and described vibrating wire pressure sensor communicate to connect, for obtaining the electric signal of described vibrating wire pressure sensor.
Wherein, described fixed bar is provided with multiple single point extensometer successively along short transverse, and the expansion link of each described single point extensometer is anchored mutually by anchor head and described foundation soil to be measured; Described data receiving terminal communicates to connect with described single point extensometer respectively, for obtaining the displacement that each described single point extensometer detects.
Wherein, this under water piling prepressing sedimentation monitoring system also comprise foundation pile, described foundation pile is arranged in the ground outside construction area, and surface level is stretched out on its top, and described data receiving terminal is arranged on the top of described foundation pile; Described data receiving terminal is connected with vibrating wire pressure sensor and described single point extensometer by signal cable.
Wherein, the lower end of described fixed bar is connected by cast-in-place concrete with described steady soil.
Wherein, described vibrating wire pressure sensor is fixed on the upper end of described fixed bar.
Wherein, described fluid reservoir is installed on the lower surface of described sedimentation plate by joint flange.
(3) beneficial effect
The sedimentation monitoring system of piling prepressing under water provided by the invention, adopt vibrating wire pressure sensor, measuring accuracy is high, and monitoring system is positioned at below the water surface, and on construction and the current not impact of above water craft, safety, stability are high; The short transverse of fixed bar arranges multiple single point extensometer, the settling amount of different soil can be tested, can the settling data at complete acquisition different depth place.
Accompanying drawing explanation
Fig. 1 is the cut-open view of the embodiment of the present invention.
In figure, 1: instrument connection; 2: fixed bar; 3: single point extensometer; 4: pedestal; 5: expansion link; 6: anchor head; 7: force pipe; 8: fluid reservoir; 9: signal cable; 10: vibrating wire pressure sensor; 11: sedimentation plate; 12: steady soil; 13: fixing card; 14: concrete; 15: joint flange; 16: foundation pile; 17: data receiving terminal; 18: surface level; 19: foundation soil to be measured.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following instance for illustration of the present invention, but is not used for limiting the scope of the invention.
With reference to shown in Fig. 1, the sedimentation monitoring system of piling prepressing under water of the present invention, is arranged at ground 19 to be measured, for the sedimentation on the top layer and different depth place of monitoring foundation soil 19 to be measured; It comprises: instrument connection 1, fixed bar 2, signal cable 9, sedimentation plate 11, fluid reservoir 8, vibrating wire pressure sensor 10 and data receiving terminal 17.Instrument connection 1 is located at foundation soil 19 to be measured, and steady soil 12 is goed deep in the lower end of instrument connection 1.Fixed bar 2 is placed in instrument connection 1, and the lower end of fixed bar 2 is connected with steady soil 12, concrete, and the lower end of fixed bar 2 is connected by cast-in-place concrete 14 with steady soil 12.Vibrating wire pressure sensor 10 is located at fixed bar 2, concrete, and vibrating wire pressure sensor 10 is located at the upper end of fixed bar 2, and enough settling amounts are left in the upper end of fixed bar 2 and the aperture, upper end of instrument connection 1.Sedimentation plate 11 is located at the aperture, upper end of instrument connection 1, is located at the upper surface of foundation soil 19 to be measured by sedimentation plate 11, is positioned at aperture, the upper end place of instrument connection 1.Fluid reservoir 8 is installed on the lower surface of sedimentation plate 11 by joint flange 15, in fluid reservoir 8, working fluid is housed, and working fluid can be water or other liquid.Fluid reservoir 8 connects a force pipe 7, and the end of force pipe 7 connects vibrating wire pressure sensor 10.Data receiving terminal 17 and vibrating wire pressure sensor 10 communicate to connect, and for obtaining the electric signal of vibrating wire pressure sensor 10, and go out the settling height of foundation soil 19 to be measured according to the change calculations of electric signal.
During use, when monitoring beginning, vibrating wire pressure sensor 10 records original pressure signal value, and send to data receiving terminal 17, data receiving terminal 17 records original pressure signal value, when there is sedimentation in foundation soil 19 to be measured, sedimentation plate 11 declines, fluid reservoir 8 also declines, because steady soil 12 is located at by fixed bar 2, therefore, the end height of force pipe 7 end is constant, but pressure changes, now, data receiving terminal 17 obtains the real-time pressure signal value of vibrating wire pressure sensor 10, real-time pressure signal value is deducted original pressure signal value, calculate formulae discovery by fluid pressure and go out settling height, this computation process can be calculated by data receiving terminal and obtain.
Further, fixed bar 2 is provided with multiple single point extensometer 3 successively along short transverse, and the expansion link 5 of each single point extensometer 3 is anchored with foundation soil 19 phase to be measured by anchor head 6; Data receiving terminal 17 communicates to connect with single point extensometer 3 respectively, for obtaining the displacement that each single point extensometer 3 detects.Concrete, every 2 ~ 3 meters of settings single point extensometer 3 in the short transverse of fixed bar 2, the expansion link 5 of single point extensometer 3 has anchor head 6, anchor head 6 stretches out the sidewall inserting instrument connection 1, when foundation soil 19 sedimentation to be measured, drive expansion link 5 to move, thus make single point extensometer 3 record the delaminating deposition amount of foundation soil 19 to be measured.
Further, this under water piling prepressing sedimentation monitoring system also comprise foundation pile 16, foundation pile 16 is arranged in the ground outside construction area, squeeze into certain depth ensure its stablize, surface level 18 is stretched out on the top of foundation pile 16, and data receiving terminal 17 is arranged on the top of foundation pile 16; Data receiving terminal 17 is connected with vibrating wire pressure sensor 10 and single point extensometer 3 by signal cable 9.Be convenient to the data observing personal observations's data receiving terminal 17.It should be noted that, remote data also can be sent on the communication terminal of observation personnel by wireless telecommunications system by data receiving terminal 17.
The sedimentation monitoring system of piling prepressing under water of the present invention, concrete construction method is as follows: get out instrument connection 1 at monitoring location rig, the bottom of instrument connection 1 is drilled into the steady soil 12 do not compressed, the fixed bar 2 that single point extensometer is housed is put into instrument connection 1, the pedestal 4 of single point extensometer 3 is fixed on fixed bar 2 by fixing card 13, the quantity that single point extensometer 3 is arranged or spacing can be arranged according to soil thickness, and the distance being generally 2 ~ 3 meters arranges one; After fixed bar 2 lower end is put into steady soil 12, a small amount of concrete 14 is built in the lower end of fixed bar 2, then the anchor head 6 of expansion link 5 front end of single point extensometer is opened, make in the hole wall in anchor head 6 Embedded test hole 1, anchor head 6 and expansion link 5 can be driven to slide during the soil body generation sedimentation of foundation soil 19 to be measured, just can obtain the delaminating deposition amount of the soil body according to the displacement of the anchor head 6 of each single point extensometer 3.The upper end in the aperture, upper end of instrument connection 1 is provided with a sedimentation plate 11, and the lower surface of sedimentation plate 11 fixes a fluid reservoir 8 by joint flange 15, wherein fluid reservoir sealing, and in fluid reservoir, working fluid is housed.Fluid reservoir 8 connects a force pipe, and the end of force pipe is connected with the vibrating wire pressure sensor 10 be fixed on fixed bar 2, and vibrating wire pressure sensor 10 is for the pressure of test pressure pipe end.When sedimentation occurs on earth's surface, fluid reservoir changes relative to the height of vibrating wire pressure sensor, and the fluid pressure of vibrating wire pressure sensor induction also changes, and by measuring frequency signal, and just can obtain subsidence value through corresponding data conversion.Single-point displacement is taken into account on the foundation pile 16 that vibrating wire pressure sensor is all pooled to by signal cable 9 outside construction area, and draws the water surface 18 and be connected on data receiving terminal 17.
Vibrating wire pressure sensor of the present invention and single point extensometer are electronic measuring device, and measuring accuracy is high.Whole monitoring system is mostly positioned at the bottom, and data collection station is positioned at outside construction area, and on construction and the current not impact of above water craft, safety, stability are high.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a piling prepressing sedimentation monitoring system under water, be arranged at foundation soil to be measured, it is characterized in that, comprise: instrument connection, fixed bar, signal cable, sedimentation plate, fluid reservoir, vibrating wire pressure sensor and data receiving terminal, described instrument connection is located at described foundation soil to be measured, and steady soil is goed deep in its lower end; Described fixed bar is placed in described instrument connection, and its lower end is connected with described steady soil; Described vibrating wire pressure sensor is located at described fixed bar, described sedimentation plate is located at the aperture, upper end of described instrument connection, described fluid reservoir is installed on the lower surface of described sedimentation plate, and described fluid reservoir connects a force pipe, and the end of described force pipe connects described vibrating wire pressure sensor; Described data receiving terminal and described vibrating wire pressure sensor communicate to connect, for obtaining the electric signal of described vibrating wire pressure sensor.
2. piling prepressing sedimentation monitoring system under water as claimed in claim 1, it is characterized in that, described fixed bar is provided with multiple single point extensometer successively along short transverse, and the expansion link of each described single point extensometer is anchored mutually by anchor head and described foundation soil to be measured; Described data receiving terminal communicates to connect with described single point extensometer respectively, for obtaining the displacement that each described single point extensometer detects.
3. piling prepressing sedimentation monitoring system under water as claimed in claim 1, it is characterized in that, this under water piling prepressing sedimentation monitoring system also comprise foundation pile, described foundation pile is arranged in the ground outside construction area, surface level is stretched out on its top, and described data receiving terminal is arranged on the top of described foundation pile; Described data receiving terminal is connected with vibrating wire pressure sensor and described single point extensometer by signal cable.
4. piling prepressing sedimentation monitoring system under water as claimed in claim 1, it is characterized in that, the lower end of described fixed bar is connected by cast-in-place concrete with described steady soil.
5. piling prepressing sedimentation monitoring system under water as claimed in claim 1, it is characterized in that, described vibrating wire pressure sensor is fixed on the upper end of described fixed bar.
6. piling prepressing sedimentation monitoring system under water as claimed in claim 1, it is characterized in that, described fluid reservoir is installed on the lower surface of described sedimentation plate by joint flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510085118.3A CN104697493A (en) | 2015-02-16 | 2015-02-16 | Underground preloading settlement monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510085118.3A CN104697493A (en) | 2015-02-16 | 2015-02-16 | Underground preloading settlement monitoring system |
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| CN104697493A true CN104697493A (en) | 2015-06-10 |
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| CN201510085118.3A Pending CN104697493A (en) | 2015-02-16 | 2015-02-16 | Underground preloading settlement monitoring system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106948329A (en) * | 2017-03-28 | 2017-07-14 | 中国港湾工程有限责任公司 | The monitoring device and its installation method of reclaimation area deep sedimentation |
| CN108225264A (en) * | 2018-03-04 | 2018-06-29 | 天津大学 | Ground sedimentation observation device and settlement observation method are made in a kind of direct burial backfill |
| CN109736285A (en) * | 2019-03-07 | 2019-05-10 | 中交第一航务工程勘察设计院有限公司 | A kind of long-range underwater settlement automatic monitoring system in coastal waters |
| CN109990760A (en) * | 2019-04-30 | 2019-07-09 | 深圳供电局有限公司 | Pipeline mapping equipment and pipeline mapping method |
| CN112556640A (en) * | 2020-11-27 | 2021-03-26 | 杨锡武 | Testing arrangement that high fill road bed or earth and rockfill dam layered settlement |
| CN112982357A (en) * | 2021-05-13 | 2021-06-18 | 水利部交通运输部国家能源局南京水利科学研究院 | Foundation layered settlement monitoring device and assembly method thereof |
| CN114781954A (en) * | 2022-06-24 | 2022-07-22 | 水利部交通运输部国家能源局南京水利科学研究院 | Method and system for evaluating foundation preloading treatment effect |
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| CN201103131Y (en) * | 2006-11-08 | 2008-08-20 | 单炜 | Automatic capturing and recording system for data of foundation settlement and deformation |
| CN204666130U (en) * | 2015-02-16 | 2015-09-23 | 中交天津港湾工程研究院有限公司 | Piling prepressing sedimentation monitoring system under water |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106948329A (en) * | 2017-03-28 | 2017-07-14 | 中国港湾工程有限责任公司 | The monitoring device and its installation method of reclaimation area deep sedimentation |
| CN106948329B (en) * | 2017-03-28 | 2022-12-06 | 中国港湾工程有限责任公司 | Device for monitoring deep settlement of sea reclamation area and installation method thereof |
| CN108225264A (en) * | 2018-03-04 | 2018-06-29 | 天津大学 | Ground sedimentation observation device and settlement observation method are made in a kind of direct burial backfill |
| CN109736285A (en) * | 2019-03-07 | 2019-05-10 | 中交第一航务工程勘察设计院有限公司 | A kind of long-range underwater settlement automatic monitoring system in coastal waters |
| CN109736285B (en) * | 2019-03-07 | 2024-01-23 | 中交第一航务工程勘察设计院有限公司 | Automatic monitoring system for offshore remote underwater foundation settlement |
| CN109990760A (en) * | 2019-04-30 | 2019-07-09 | 深圳供电局有限公司 | Pipeline mapping equipment and pipeline mapping method |
| CN112556640A (en) * | 2020-11-27 | 2021-03-26 | 杨锡武 | Testing arrangement that high fill road bed or earth and rockfill dam layered settlement |
| CN112982357A (en) * | 2021-05-13 | 2021-06-18 | 水利部交通运输部国家能源局南京水利科学研究院 | Foundation layered settlement monitoring device and assembly method thereof |
| CN112982357B (en) * | 2021-05-13 | 2022-01-11 | 水利部交通运输部国家能源局南京水利科学研究院 | Foundation layered settlement monitoring device and assembly method thereof |
| CN114781954A (en) * | 2022-06-24 | 2022-07-22 | 水利部交通运输部国家能源局南京水利科学研究院 | Method and system for evaluating foundation preloading treatment effect |
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Application publication date: 20150610 |