CN108756856A - A kind of construction method of distribution type fiber-optic drillhole inclination survey - Google Patents
A kind of construction method of distribution type fiber-optic drillhole inclination survey Download PDFInfo
- Publication number
- CN108756856A CN108756856A CN201810640854.4A CN201810640854A CN108756856A CN 108756856 A CN108756856 A CN 108756856A CN 201810640854 A CN201810640854 A CN 201810640854A CN 108756856 A CN108756856 A CN 108756856A
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- Prior art keywords
- drilling
- optic
- survey
- sensor fibre
- monitoring
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
Abstract
The invention belongs to ground deformation monitoring fields; a kind of construction method of distribution type fiber-optic drillhole inclination survey is disclosed, is laid with by drilling construction, sensor fibre, sensor fibre encapsulates, grouting, fiber outlet protection construction can be used for the monitoring of distribution type fiber-optic drillhole inclination survey in hole.The distribution type fiber-optic drillhole inclination survey technology of the present invention can meet requirement of the fiber-optic monitoring for drillhole inclination survey, and can at least save 1/3 or more monitoring expense compared with conventional drillhole inclination survey technology；Drillhole inclination survey functional requirement may be implemented in the sensor fibre encapsulation technology that the present invention uses, and has good effect to the monitoring of geotechnical slope deep deformation.The present invention is operated suitable for normalized construction, is a kind of creatively new integrated of associated construction method under geotechnical engineering monitoring technology development.
Description
Technical field
The invention belongs to geotechnical engineering monitoring field more particularly to a kind of construction methods of distribution type fiber-optic drillhole inclination survey.
Background technology
Currently, the prior art commonly used in the trade is such：Rock And Soil inner inclination displacement monitoring is that geotechnical engineering circle is closed
The important topic of the heart.Ground inclinometer is based primarily upon electrical measuring method at present, and there are the degree of automation and instrument reliabilities for conventional equipment
The defects such as low, data are not in time, measurement accuracy is low are unfavorable for information-aided construction and monitoring.Based on Brillouin optical time domain analysis (letter
Claim BOTDA:Brillouin Optical Time-Domain Analysis) Distributed Optical Fiber Sensing Techniques have monitoring spirit
The advantages that sensitivity height, energy real time on-line monitoring, but distributed fiberoptic sensor is mainly used for the parameters such as strain and temperature at present
Monitoring is attempted to bury in the form of friction pile for Liu Yong jasmines, Sui Haibo et al. in terms of deviational survey, but using the form of friction pile
It is embedded to bury dumb there are monitoring point, it needs by existing friction pile, if individually designed bury of high cost, construction speed
Slowly the problems such as, difficulty of construction is big, it is difficult to wide popularization and application.
In conclusion problem of the existing technology is：
(1) buried in the form of friction pile buries dumb there are monitoring point, needs by existing friction pile, if
The problems such as individually designed embedded of high cost, construction speed is slow, difficulty of construction is big, it is difficult to wide popularization and application.
(2) ground inclinometer is based primarily upon electrical measuring method at present, that there are the degree of automation and instrument reliability is low for conventional equipment,
The defects such as data are not in time, measurement accuracy is low are unfavorable for information-aided construction and monitoring.
Solve the difficulty and meaning of above-mentioned technical problem：The distribution type fiber-optic drillhole inclination survey technology of the present invention and conventional brill
Hole battering methods are compared, and can meet requirement of the fiber-optic monitoring for drillhole inclination survey, and can at least save monitoring expense 1/3
More than；Drillhole inclination survey functional requirement may be implemented in the sensor fibre encapsulation technology that the present invention uses, to geotechnical slope deep deformation
Monitoring has good effect.The present invention is operated suitable for normalized construction, is related under geotechnical engineering monitoring technology development
The a kind of of construction method creatively newly integrates.
Invention content
In view of the problems of the existing technology, the present invention provides a kind of construction methods of distribution type fiber-optic drillhole inclination survey.
The invention is realized in this way a kind of construction method of distribution type fiber-optic drillhole inclination survey, distribution type fiber-optic drilling
Deviational survey construction method includes the following steps：
Step 1：Drilling construction drills in the position for needing inclination monitoring, and drilling depth will be embedded in basement rock and (be relatively fixed
Position), the aperture of drilling is not less than 100mm, to use mud off, drilling to reach projected depth in the case of having collapse hole
Afterwards, PVC casings are transferred in drilling in time, PVC casings will touch borehole wall, after casing transfers to projected depth, cleaning eye
Interior mud and rock ballast；
Step 2：Sensor fibre is laid with, and sensor fibre symmetrical laying is on the outside of inclinometer pipe, brush last layer while being laid with
The optical fiber of PVC glue, the preliminary sensor fibre fixed on the outside of inclinometer pipe, deviational survey bottom of the tube is protected using PU hoses, forms arc
Connection；
Step 3：Sensor fibre encapsulates, and sensor fibre of the symmetrical laying on the outside of inclinometer pipe uses epoxy encapsulation, surveys
Inclined tube bottom sensors optical fiber should also add protection sealing cover after using epoxy encapsulation, in case inclinometer pipe meets with when transferring to bottom hole
It is damaged；
Step 4：Grouting, grouting includes grouting and deviational survey ipe grout in drilling, first to ensure the verticality of inclinometer pipe
It first carries out being in the milk (i.e. inclinometer pipe rim grout) in hole, inclinometer pipe rim grout, which finishes, followed by starts deviational survey ipe grout, fills
Starching speed cannot be too fast, should avoid the violent shaking of inclinometer pipe；
Step 5：Cable exit is protected, and to ensure that cable exit is straight, not twisting, corner radius of curvature should be not less than
20 times of optic cable diameter, outlet optical cable are intended to using lead line after PU hoses package.
Further, the drilling construction meets following requirements：The aperture of drilling cannot be less than 100mm, and drilling reaches design
Bulk rock ballast in hole is cleaned out after depth, the PVC sleeve outers of decentralization are smaller 2~10mm than drilling internal diameter, and bottom will add
End cap, it is ensured that PVC casings are transferred in metapore without rock ballast, and mud in extraction aperture simultaneously during the indentation decentralization of PVC casings is kept away
It is excessive to exempt from resistance of pressing in.
Further, the sensor fibre packaging method is as follows：Deviational survey pipe outside diameter is not less than 70mm, and bottom adds end cap, end cap
Outer diameter and the connector of inclinometer pipe be intended to want identical with deviational survey pipe outside diameter, avoid the irregularity after optical cable laying.
In conclusion advantages of the present invention and good effect are：A kind of construction of distribution type fiber-optic drillhole inclination survey of the present invention
Method can meet the internal displacement point of massif side slope, tailing dam, water conservancy project dam etc. compared with existing friction pile burying technology
Cloth fiber-optic monitoring, embedded point setting is flexibly, construction speed is fast and can at least save 1/3 or more foundation engineering cost；This
The sensor fibre packaging method that invention uses can meet the small optical fiber transmission requirement of light loss, will not be in extensive construction environment
In wreck, have good effect to Rock And Soil deep inclination monitoring.The present invention is operated suitable for normalized construction, design
Construction method enormously simplify the associated construction process of the prior art, the knot of canonical correlation product in used branch technique
Structure is simple, easy to use；The present invention be associated construction method under geotechnical engineering monitoring technology development it is a kind of creatively
It is new integrated, it achieves and is substantially better than previous technique effect, as what geotechnical engineering monitoring was put into practice further deeply develops,
Will have expected more huge economic value and social value.
The present invention is looked into newly by scientific-technical information of Guangdong Province Asia ox, it was therefore concluded that：The present invention is on the basis of existing research
On, further continuous High Side Slope of Highway is mined massively the engineer application monitored with distributed fiberoptic sensor in big regional extent, needle
To flaw-piece engineering distribution formula optic-fiber monitoring system, real-time, mass data carries out efficiently and reliably long-term online acquisition, analysis, place
The high-performance Application of Monitoring System management software of reason and storage data, and realize based on internet+pattern slope monitoring, early warning
With the researchs such as information visualization, identical document report there are no.
Description of the drawings
Fig. 1 is distribution type fiber-optic drillhole inclination survey construction method flow chart provided in an embodiment of the present invention；
Fig. 2 is that schematic diagram is buried in drilling provided in an embodiment of the present invention；
Fig. 3 is optical fiber encapsulation schematic diagram provided in an embodiment of the present invention；
Fig. 4 is deviational survey pipe end-cap provided in an embodiment of the present invention and connector schematic diagram；
In figure：1, optical fiber；2, PU hoses；3, epoxy resin；4, inclinometer pipe；5, connector；6, end cap；7, sealing cover；8,
Pvc pipe；9, grouting in drilling；10, the inclinometer pipe of optical fiber is encapsulated；11, deviational survey ipe grout.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
The method of the present invention is explained in detail below in conjunction with the accompanying drawings.
As shown in Figure 1, distribution type fiber-optic drillhole inclination survey construction method provided in an embodiment of the present invention includes the following steps：
S101：Drilling construction drills in the position for needing inclination monitoring, and it is (relatively-stationary that drilling depth will be embedded in basement rock
Position), the aperture of drilling is not less than 100mm, after using mud off, drilling to reach projected depth in the case of having collapse hole,
PVC casings are transferred in drilling in time, PVC casings will touch borehole wall, after casing transfers to projected depth, mud in cleaning eye
Slurry and rock ballast；
S102：Sensor fibre is laid with, and sensor fibre symmetrical laying is on the outside of inclinometer pipe, brush last layer while being laid with
The optical fiber of PVC glue, the preliminary sensor fibre fixed on the outside of inclinometer pipe, deviational survey bottom of the tube is protected using PU hoses, forms arc
Connection；
S103：Sensor fibre encapsulates, and sensor fibre of the symmetrical laying on the outside of inclinometer pipe uses epoxy encapsulation, deviational survey
Bottom of the tube sensor fibre should also add protection sealing cover after using epoxy encapsulation, so as not to when inclinometer pipe transfer to bottom hole by
It destroys；
S104：Grouting, grouting include grouting and deviational survey ipe grout in drilling, to ensure the verticality of inclinometer pipe, first
Be in the milk (i.e. inclinometer pipe rim grout) in hole, inclinometer pipe rim grout, which finishes, followed by starts deviational survey ipe grout, grouting
Speed cannot be too fast, should avoid the violent shaking of inclinometer pipe；
S105：Cable exit is protected, and to ensure that cable exit is straight, not twisting, corner radius of curvature should be not less than light
20 times of cable diameter, outlet optical cable are intended to using lead line after PU hoses package.
Further, description drilling construction meets following requirements：The aperture of drilling cannot be less than 100mm, and drilling reaches design
Bulk rock ballast in hole is cleaned out after depth, the PVC sleeve outers of decentralization are smaller 2~10mm than drilling internal diameter, and bottom will add
End cap, it is ensured that PVC casings are transferred in metapore without rock ballast, and mud in extraction aperture simultaneously during the indentation decentralization of PVC casings is kept away
It is excessive to exempt from resistance of pressing in.
Further, description sensor fibre packaging method is as follows：Deviational survey pipe outside diameter is not less than 70mm, and bottom adds end cap, end cap
Outer diameter and the connector of inclinometer pipe be intended to want identical with deviational survey pipe outside diameter, avoid the irregularity after optical cable laying.
As shown in Fig. 2, schematic diagram is buried in drilling provided in an embodiment of the present invention, drilling is embedded to include：In pvc pipe 8, drilling
Grouting 9, inclinometer pipe 10, the oblique ipe grout 11 for encapsulating optical fiber.
Pvc pipe 8 is attached to hole inner wall, and the inclinometer pipe 10 for encapsulating optical fiber is placed in hole, pvc pipe 8 and the survey for encapsulating optical fiber
It is grouting 9 in drilling between inclined tube 10, it is oblique ipe grout 11 to encapsulate in the inclinometer pipe 10 of optical fiber.
As shown in figure 3, optical fiber encapsulation schematic diagram provided in an embodiment of the present invention, optical fiber 1, epoxy resin 3, are surveyed PU hoses 2
Inclined tube 4, connector 5, end cap 6, sealing cover 7.
4 peripheral hardware optical fiber 1 of inclinometer pipe, PU hoses 2 are arranged inclinometer pipe 4 and form arc connection, deviational survey, the sensor fibre 1 in 4 outsides
It is encapsulated using epoxy resin 3, inclinometer pipe 4 is provided with end cap 6, connector 5 is set in inclinometer pipe 4, and 4 outlet end of inclinometer pipe is provided with close
Capping 7.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (3)
1. a kind of construction method of distribution type fiber-optic drillhole inclination survey, which is characterized in that the distribution type fiber-optic drillhole inclination survey construction
Method includes the following steps：
Step 1：Drilling construction drills in the position for needing inclination monitoring, and drilling depth will be embedded in basement rock, and the aperture of drilling is not
PVC is transferred in drilling in time after using mud off, drilling to reach projected depth in the case of having collapse hole less than 100mm
Casing, PVC casings will touch borehole wall, after casing transfers to projected depth, mud and rock ballast in cleaning eye；
Step 2：Sensor fibre is laid with, and sensor fibre symmetrical laying is on the outside of inclinometer pipe, brush last layer PVC while being laid with
The optical fiber of glue, the preliminary sensor fibre fixed on the outside of inclinometer pipe, deviational survey bottom of the tube is protected using PU hoses, is formed arc and is connected
It connects；
Step 3：Sensor fibre encapsulates, and sensor fibre of the symmetrical laying on the outside of inclinometer pipe uses epoxy encapsulation, inclinometer pipe
Bottom sensors optical fiber should also add protection sealing cover after using epoxy encapsulation, in order to avoid by broken when inclinometer pipe transfers to bottom hole
It is bad；
Step 4：Grouting, grouting include drilling in grouting and deviational survey ipe grout, for guarantee inclinometer pipe verticality, first into
It is in the milk in row hole, inclinometer pipe rim grout, which finishes, followed by starts deviational survey ipe grout, and filling speed cannot be too fast, should avoid surveying
The violent shaking of inclined tube；
Step 5：Cable exit is protected, and to ensure that cable exit is straight, not twisting, corner radius of curvature should be not less than optical cable
20 times of diameter, outlet optical cable are intended to using lead line after PU hoses package.
2. the construction method of distribution type fiber-optic drillhole inclination survey as described in claim 1, which is characterized in that the drilling construction is full
Foot states requirement：The aperture of drilling cannot be less than 100mm, and drilling does bulk rock ballast cleaning in hole after reaching projected depth
Only, the PVC sleeve outers of decentralization are smaller 2~10mm than drilling internal diameter, and bottom will add end cap, it is ensured that do not have in PVC casings decentralization metapore
There is a rock ballast, mud in extraction aperture simultaneously during the indentation decentralization of PVC casings.
3. the construction method of distribution type fiber-optic drillhole inclination survey as described in claim 1, which is characterized in that the sensor fibre envelope
Dress method is as follows：Deviational survey pipe outside diameter is not less than 70mm, and bottom adds end cap, the outer diameter of end cap and the connector of inclinometer pipe be intended to
Deviational survey pipe outside diameter wants identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810640854.4A CN108756856A (en) | 2018-06-21 | 2018-06-21 | A kind of construction method of distribution type fiber-optic drillhole inclination survey |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810640854.4A CN108756856A (en) | 2018-06-21 | 2018-06-21 | A kind of construction method of distribution type fiber-optic drillhole inclination survey |
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| Publication Number | Publication Date |
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| CN108756856A true CN108756856A (en) | 2018-11-06 |
Family
ID=63979376
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|---|---|---|---|
| CN201810640854.4A Pending CN108756856A (en) | 2018-06-21 | 2018-06-21 | A kind of construction method of distribution type fiber-optic drillhole inclination survey |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115288212A (en) * | 2022-07-05 | 2022-11-04 | 湖北工业大学 | Optical fiber implanting device and method for existing pile wall |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115288212A (en) * | 2022-07-05 | 2022-11-04 | 湖北工业大学 | Optical fiber implanting device and method for existing pile wall |
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Application publication date: 20181106 |