CN110736430B - Fiber grating displacement meter installation and protection method suitable for deep underground engineering - Google Patents
Fiber grating displacement meter installation and protection method suitable for deep underground engineering Download PDFInfo
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- CN110736430B CN110736430B CN201910984872.9A CN201910984872A CN110736430B CN 110736430 B CN110736430 B CN 110736430B CN 201910984872 A CN201910984872 A CN 201910984872A CN 110736430 B CN110736430 B CN 110736430B
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- steel pipe
- displacement meter
- grouting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/165—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by means of a grating deformed by the object
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/18—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge using photoelastic elements
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- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a fiber grating displacement meter installation and protection method suitable for deep underground engineering, and belongs to the technical field of deep underground engineering measurement. The invention relates to a fiber grating displacement meter installation and line protection method suitable for deep underground engineering. The invention has the advantages of simple structure, convenient construction, low cost and the like.
Description
Technical Field
The invention relates to a displacement meter line protection method under complex working conditions of high ground stress blasting interference, large deformation of soft rock and water inrush and mud gushing, and belongs to the technical field of measurement of tunnel, rock and soil engineering.
Background
At present, the measurement of the deep displacement of the surrounding rock mainly monitors the change condition of the deep surrounding rock deformation along with time. The purpose of measuring the deep displacement of the surrounding rock is as follows: (1) the displacement of different depths of each part of the tunnel surrounding rock and the weakening and damage range (separation condition, plastic zone, broken zone distribution and the like) of the rock stratum are known, and design basis is provided for the subsequent concrete supporting structure; (2) and judging whether the anchor rod is separated from the surrounding rock or not, and judging whether the anchor rod strain exceeds the limit strain amount or not, thereby providing a basis for modifying the anchor rod support design. (3) And judging whether the concrete supporting structure is damaged or not.
However, in the prior art, problems of high stress rock burst, large deformation of soft rock, water inrush and mud gushing, cracking of lining and well wall, blasting interference, artificial damage, mechanical damage and the like are often encountered in the deep underground construction process, which brings great challenges to the installation of monitoring equipment and the protection of circuits, but the characteristics of thin aperture, fragile texture and easy fracture of the optical fiber limit the wide application of the optical fiber grating technology.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the installation and protection method of the fiber bragg grating displacement meter, which is suitable for deep underground engineering and can safely and efficiently carry out the installation and line protection of the fiber bragg grating displacement meter.
The invention is realized by the following technical scheme: a fiber grating displacement meter installation and protection method suitable for deep underground engineering comprises the following steps:
step one, drilling construction, namely completing drilling meeting the actual technical requirements through a drilling machine and a drill bit;
step two, assembling the optical fiber displacement meter, preparing a thickened steel pipe, wherein the front end of the thickened steel pipe is in a conical shape, a plurality of exhaust holes are formed in the conical shape, the rear end of the thickened steel pipe is a pre-reserved grouting exhaust and slurry return port, the thickened steel pipe is also used as a slurry return channel, a guide-in steel pipe is arranged in the thickened steel pipe, one end, extending into the thickened steel pipe, of the guide-in steel pipe is hermetically connected with an arc-shaped corrugated connecting pipe, the corrugated connecting pipe penetrates out from the side wall close to the front end of the thickened steel pipe, the other end of the guide-in steel pipe extends out from the rear end of the thickened steel pipe, the guide-in steel pipe and the corrugated connecting pipe form a U-shaped channel, an optical cable penetrates through the guide-in steel pipe, penetrates out from the U-shaped channel and returns to the outside of the drill hole from the outer wall of the thickened steel pipe, the connected optical fiber displacement meter is connected with the, sealing the sealing position of the corrugated connecting pipe by using a sealing material;
step three, after the optical fiber displacement meter is assembled, the rear end of the thickened steel pipe is closed by a prefabricated perforated steel baffle plate, the aperture of a central hole of the prefabricated perforated steel baffle plate is matched with that of the lead-in steel pipe, and the rest holes of the prefabricated perforated steel baffle plate are exhaust holes during grouting;
fourthly, the assembled optical fiber displacement meter assembly and the thickened steel tube assembly are placed into a drill hole, a grouting pipe is placed into the drill hole, the seal of the drill hole is sealed, the outlet of the grouting pipe is placed on the opposite side of the optical cable for grouting, grouting slurry is grouted by adopting a cement-water-glass double-liquid grouting material, the weight ratio of water to cement is 1:1, and grouting is continuously carried out by adopting the grouting pressure of 0.5Mpa so as to prevent premature solidification, namely, the whole closed hole is fully filled at one time; after a certain amount of grouting is carried out, the thickened steel pipe starts to flow out with gas and slurry returning slurry, grouting operation can be stopped, the grouting pipe is sealed, and full-drilling grouting operation is finished.
The seal of the drilled hole is sealed by a Marilsan sealing body in advance, and then is sealed by an anchoring agent.
And in the second step, filling foam mud into the leading-in steel pipe for protecting the line.
The optical cable adopts a metal-based cable-shaped strain sensing optical cable.
The thickened steel pipe is a phi 60mm steel pipe, and the leading-in steel pipe is a phi 20mm galvanized steel pipe.
The sealing material is glass cement.
The corrugated connecting pipe is a phi 25mm corrugated connecting pipe, and the joint of the corrugated connecting pipe and the leading-in steel pipe is sealed.
The invention has the beneficial effects that: according to the invention, by means of the steel pipe thickening, the steel pipe guiding, the corrugated connecting pipe, the glass cement sealing and the stemming multi-line protection method, sufficient rigidity is guaranteed to be provided when surrounding rock is deformed, a space allowing movement is provided for the optical cable due to the flexible protection material of the stemming, and the rigid damage of the line caused by careless operation during installation is avoided. The mounting method is different from other mounting methods of the displacement meter which directly exposes the line in the drill hole, and the survival rate of the displacement meter is greatly improved. The invention has the advantages of simple structure, convenient construction, low cost and the like.
The reserved steel pipe can directly penetrate through the concrete for permanent lining, so that the damage to a line in the process of second lining construction is avoided, and the monitoring period of the displacement meter is greatly prolonged.
The multiple protection structure greatly improves the shearing damage resistance of the line to surrounding rocks in a complex geological condition, poor lithology and gushing water environment.
The multi-protection displacement meter has the advantages that the survival rate and the service life of the displacement meter are greatly improved, the monitoring stability is good, the increase of the later-period workload caused by the damage of the displacement meter line is avoided, the working efficiency is improved, and the construction cost is reduced.
According to the invention, the prefabricated perforated steel baffle is used, so that the compactness of the filling slurry can be effectively improved, and the accuracy of monitoring data is improved.
Drawings
The invention is further illustrated below with reference to the figures and examples.
FIG. 1 is a view showing a structure of a state of use of the present invention;
FIG. 2 is a front view of a prefabricated perforated steel baffle of the present invention.
In the figure, 1-fiber optic cable; 2-thickening the steel pipe; 2-1-lead-in steel pipe, 3-Marilyn closed body; 4-grouting pipe; 5-air exhaust hole; 6, drilling; 7-cement-water glass double-liquid grouting material; 8-corrugated connecting pipes; 9-a sealing material; 10-binding a belt; 11-a grating displacement meter; 12-binding wire ribbon; 13-an anchoring agent; 14-prefabricating a perforated steel baffle plate; 15-stemming.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the specification, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.
Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail but are intended to be part of the specification as appropriate.
A fiber grating displacement meter installation and protection method suitable for deep underground engineering comprises the following steps, which can refer to figures 1 and 2:
step one, drilling construction, namely completing a drill hole 6 which meets the actual technical requirements through a drilling machine and a drill bit; the drilling construction can adopt a C-6 drilling machine, the diameter of a drill bit is 110mm, and the drill bit is connected with a drill frame to control the deflection angle of the drilled hole and achieve the drilling direction of the technical requirement.
Step two, assembling an optical fiber displacement meter, preparing a thickened steel pipe 2, wherein the front end of the thickened steel pipe 2 is in a conical shape, a plurality of exhaust holes 5 are formed in the conical shape, the rear end of the thickened steel pipe 2 is a pre-reserved grouting exhaust and slurry return port, the thickened steel pipe 2 is also used as a slurry return channel, a guide-in steel pipe 2-1 is arranged in the thickened steel pipe 2, one end, extending into the thickened steel pipe 2, of the guide-in steel pipe 2-1 is hermetically connected with an arc corrugated connecting pipe 8, the corrugated connecting pipe 8 penetrates out from the side wall close to the front end of the thickened steel pipe 2, the other end of the guide-in steel pipe 2-1 extends out from the rear end of the thickened steel pipe 2, the guide-in steel pipe 2-1 and the corrugated connecting pipe 8 form a U-shaped channel, the optical cable 1 penetrates into the guide-in steel pipe 2-1 and penetrates out from the U-shaped channel and, the grating displacement meter 11 and the optical cable 1 outside the thickened steel pipe 2 are bound and fixed through a wire binding ribbon 12, the grating displacement meter 11 and the optical cable 1 outside the thickened steel pipe 2 are sealed and protected by a Marilson closing body 3, and the sealing position of the corrugated connecting pipe 8 is sealed by a sealing material 9;
step three, after the optical fiber displacement meter is assembled, the rear end of the thickened steel pipe 2 is closed by a prefabricated perforated steel baffle plate 14, the aperture of a central hole of the prefabricated perforated steel baffle plate 14 is matched with that of the lead-in steel pipe 2-1, and the rest holes of the prefabricated perforated steel baffle plate 14 are exhaust holes in grouting; the prefabricated steel baffle plate with holes 14 is used for sealing the thickened steel pipe and increasing the grouting pressure.
Fourthly, the assembled optical fiber displacement meter assembly and the thickened steel tube 2 assembly are placed into a drill hole 6, a grouting pipe 4 is placed into the drill hole, the seal of the drill hole 6 is sealed, the outlet of the grouting pipe 4 is placed on the opposite side of the optical cable for grouting, grouting slurry is grouted by adopting a cement-water-glass double-liquid grouting material 7, the weight ratio of water to cement is 1:1, and grouting is continuously carried out by adopting the grouting pressure of 0.5Mpa so as to prevent premature solidification, namely, the sealed whole hole is fully filled at one time; after a certain amount of grouting, the thickened steel pipe 2 starts to flow out with gas and slurry returning slurry, the grouting operation can be stopped, the grouting pipe 4 is closed, and the full-drilling grouting operation is finished.
The bore 6 can be sealed beforehand by means of a Marilsan closure 3 and subsequently by means of an anchoring agent 13. Double plugging improves the tightness of the seal.
In the second step, the introducing steel pipe 2-1 is filled with foam mud 15 to protect the line.
The optical cable 1 is a metal-based cable-shaped strain sensing optical cable.
The thickened steel pipe 2 is a phi 60mm steel pipe, and the leading-in steel pipe 2-1 is a phi 20mm galvanized steel pipe.
The sealing material 9 is glass cement.
The corrugated connecting pipe 8 is a phi 25mm corrugated connecting pipe, and the joint of the corrugated connecting pipe 8 and the leading-in steel pipe 2-1 is sealed.
According to the invention, by means of the steel pipe thickening, the steel pipe guiding, the corrugated connecting pipe, the glass cement sealing and the stemming multi-line protection method, sufficient rigidity is guaranteed to be provided when surrounding rock is deformed, a space allowing movement is provided for the optical cable due to the flexible protection material of the stemming, and the rigid damage of the line caused by careless operation during installation is avoided. The mounting method is different from other mounting methods of the displacement meter which directly exposes the line in the drill hole, and the survival rate of the displacement meter is greatly improved. The invention has the advantages of simple structure, convenient construction, low cost and the like.
The above description is only exemplary of the present invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A fiber grating displacement meter installation and protection method suitable for deep underground engineering is characterized in that: the method comprises the following steps:
step one, drilling construction, namely completing drilling (6) which meets the actual technical requirements through a drilling machine and a drill bit;
step two, assembling an optical fiber displacement meter, preparing a thickened steel pipe (2), wherein the front end of the thickened steel pipe (2) is in a conical shape, a plurality of exhaust holes (5) are formed in the conical shape, the rear end of the thickened steel pipe (2) is a reserved grouting exhaust and slurry return opening, the thickened steel pipe (2) is also used as a slurry return channel, a leading-in steel pipe (2-1) is arranged in the thickened steel pipe (2), one end, extending into the thickened steel pipe (2), of the leading-in steel pipe (2-1) is connected with an arc corrugated connecting pipe (8) in a sealing mode, the corrugated connecting pipe (8) penetrates out of the side wall close to the front end of the thickened steel pipe (2), the other end of the leading-in steel pipe (2-1) extends out of the rear end of the thickened steel pipe (2), the leading-in steel pipe (2-1) and the corrugated connecting pipe (8) form a U-shaped channel, an optical cable (1) penetrates in from the leading-in steel pipe (2-1), connecting the connected grating displacement meter (11) with an optical cable (1), binding and fixing the grating displacement meter (11) and the optical cable (1) outside the thickened steel pipe (2) through a binding wire binding belt (12), sealing and protecting the grating displacement meter (11) and the optical cable (1) outside the thickened steel pipe (2) by using a Marilyn closing body (3), and sealing the sealing position of the corrugated connecting pipe (8) by using a sealing material (9);
step three, after the optical fiber displacement meter is assembled, the rear end of the thickened steel pipe (2) is closed by a prefabricated perforated steel baffle plate (14), the aperture of a central hole of the prefabricated perforated steel baffle plate (14) is matched with that of the lead-in steel pipe (2-1), and the rest holes of the prefabricated perforated steel baffle plate (14) are exhaust holes during grouting;
fourthly, the assembled optical fiber displacement meter assembly and the thickened steel pipe (2) assembly are placed into a drill hole (6), a grouting pipe (4) is placed into the drill hole, the seal of the drill hole (6) is sealed, the outlet of the grouting pipe (4) is placed on the opposite side of the optical cable for grouting, grouting slurry is grouted by adopting a cement-water-glass double-liquid grouting material (7), the weight ratio of water to cement is 1:1, and grouting pressure of 0.5Mpa is adopted for continuous and uninterrupted grouting to prevent premature solidification, namely, the whole closed hole is fully filled at one time; after a certain amount of grouting is carried out, the thickened steel pipe (2) starts to flow out with gas and slurry returning slurry, the grouting operation can be stopped, the grouting pipe (4) is closed, and the full-drilling grouting operation is finished;
the seal of the drilling hole (6) is sealed by a Marilsan closing body (3) in advance, and then is sealed by an anchoring agent (13).
2. The method for installing and protecting the fiber grating displacement meter suitable for deep underground engineering according to claim 1, wherein the method comprises the following steps: and in the second step, the guide-in steel pipe (2-1) is filled with foam mud (15) for protecting the line.
3. The method for installing and protecting the fiber grating displacement meter suitable for deep underground engineering according to claim 1, wherein the method comprises the following steps: the optical cable (1) adopts a metal-based cable-shaped strain sensing optical cable.
4. The method for installing and protecting the fiber grating displacement meter suitable for deep underground engineering according to claim 1, wherein the method comprises the following steps: the thickened steel tube (2) is a phi 60mm steel tube, and the leading-in steel tube (2-1) is a phi 20mm galvanized steel tube.
5. The method for installing and protecting the fiber grating displacement meter suitable for deep underground engineering according to claim 1, wherein the method comprises the following steps: the sealing material (9) is glass cement.
6. The installation and protection method of the fiber grating displacement meter suitable for deep underground engineering according to claim 1 or 4, wherein the method comprises the following steps: the corrugated connecting pipe (8) is a phi 25mm corrugated connecting pipe, and the joint of the corrugated connecting pipe (8) and the leading-in steel pipe (2-1) is sealed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910984872.9A CN110736430B (en) | 2019-10-16 | 2019-10-16 | Fiber grating displacement meter installation and protection method suitable for deep underground engineering |
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| CN201910984872.9A CN110736430B (en) | 2019-10-16 | 2019-10-16 | Fiber grating displacement meter installation and protection method suitable for deep underground engineering |
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| CN110736430A CN110736430A (en) | 2020-01-31 |
| CN110736430B true CN110736430B (en) | 2021-06-22 |
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| CN116007525B (en) * | 2023-03-24 | 2023-06-16 | 石家庄宜中机电技术有限公司 | On-line monitoring device for dense grating of deformation of coal mine shaft wall |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102537A (en) * | 2010-12-20 | 2011-06-22 | 中铁隧道集团有限公司 | Tunnel surrounding rock radial stress strain distributed monitoring technology |
| CN102168950A (en) * | 2010-12-20 | 2011-08-31 | 中铁隧道集团有限公司 | Method of using distributed optical fibers for advanced monitoring of tunnel surrounding rock deformation |
| WO2012104272A1 (en) * | 2011-01-31 | 2012-08-09 | Eaton Aerospace Limited | Gas conditioning membrane separation system |
| CN103225146A (en) * | 2012-01-27 | 2013-07-31 | 里特机械公司 | Air jet spinning machine with a cleaning organ and method for cleaning the eddy chamber of an air jet spinning machine |
| CN109763848A (en) * | 2019-01-25 | 2019-05-17 | 北京瑞威世纪铁道工程有限公司 | The early high-strength prestressed anchor cable construction method of tunnel and underground engineering |
| CN110017152A (en) * | 2019-03-23 | 2019-07-16 | 新汶矿业集团有限责任公司孙村煤矿 | A kind of underground engineering country rock substep grouting strengthening method smashed to pieces |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI262289B (en) * | 2005-09-23 | 2006-09-21 | Univ Nat Chiao Tung | Optical-fiber raster double-bearing type inclination sensor for sensing stratum displacement |
| CN202066479U (en) * | 2011-03-08 | 2011-12-07 | 赵恩国 | Linear fiber bragg grating displacement meter |
| CN102877870A (en) * | 2012-10-18 | 2013-01-16 | 湖南科技大学 | Static and dynamic combined intelligent pre-warning anchor rod |
| CN103556992B (en) * | 2013-10-25 | 2016-03-30 | 中国矿业大学 | A kind of acquisition methods of fiber grating geostatic stress |
| CN103557012B (en) * | 2013-11-19 | 2016-07-06 | 河南理工大学 | A kind of roadway with large deformation wall rock grouting fastening carrying structure and construction method |
| CN105604593B (en) * | 2016-03-17 | 2018-05-04 | 天津大学 | A kind of three stages anchoring Combined hollow grouted anchor bar |
| CN106225818A (en) * | 2016-07-15 | 2016-12-14 | 东南大学 | A kind of single-point temperature compensation multifunctional intellectual anchor pole and installation distribution method thereof |
-
2019
- 2019-10-16 CN CN201910984872.9A patent/CN110736430B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102537A (en) * | 2010-12-20 | 2011-06-22 | 中铁隧道集团有限公司 | Tunnel surrounding rock radial stress strain distributed monitoring technology |
| CN102168950A (en) * | 2010-12-20 | 2011-08-31 | 中铁隧道集团有限公司 | Method of using distributed optical fibers for advanced monitoring of tunnel surrounding rock deformation |
| WO2012104272A1 (en) * | 2011-01-31 | 2012-08-09 | Eaton Aerospace Limited | Gas conditioning membrane separation system |
| CN103225146A (en) * | 2012-01-27 | 2013-07-31 | 里特机械公司 | Air jet spinning machine with a cleaning organ and method for cleaning the eddy chamber of an air jet spinning machine |
| CN109763848A (en) * | 2019-01-25 | 2019-05-17 | 北京瑞威世纪铁道工程有限公司 | The early high-strength prestressed anchor cable construction method of tunnel and underground engineering |
| CN110017152A (en) * | 2019-03-23 | 2019-07-16 | 新汶矿业集团有限责任公司孙村煤矿 | A kind of underground engineering country rock substep grouting strengthening method smashed to pieces |
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Inventor after: Sun Xiaoming Inventor after: Ren Chao Inventor after: Zhang Yong Inventor after: Tao Zhigang Inventor after: Guo Zhibiao Inventor before: Sun Xiaoming Inventor before: Zhang Yong Inventor before: Ren Chao Inventor before: Tao Zhigang Inventor before: Guo Zhibiao |
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