CN110863477B - Long-distance horizontal freezing hole optical fiber gyroscope inclination measuring method - Google Patents
Long-distance horizontal freezing hole optical fiber gyroscope inclination measuring method Download PDFInfo
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- CN110863477B CN110863477B CN201911016486.7A CN201911016486A CN110863477B CN 110863477 B CN110863477 B CN 110863477B CN 201911016486 A CN201911016486 A CN 201911016486A CN 110863477 B CN110863477 B CN 110863477B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/58—Turn-sensitive devices without moving masses
- G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
- G01C19/72—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
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Abstract
The invention discloses a long-distance horizontal freezing hole optical fiber gyro inclination measuring method, which comprises the following steps: (A) processing the inclinometer pipe; (B) lowering the inclinometer pipe; (C) connecting a fiber optic gyroscope inclinometer; (D) lowering and pulling out the fiber optic gyroscope inclinometer; (E) an inclinometer method of the fiber optic gyro inclinometer; (F) and (5) processing the data of the fiber optic gyroscope inclinometer. According to the characteristics of the horizontal freezing hole, the invention provides a method for accurately measuring the inclination of the freezing hole aiming at the requirement of the accuracy of the freezing hole on the basis of overcoming the influence of the connection of the freezing pipe and the inner coupling. Meanwhile, a method of averaging by multiple measurements is adopted, the error is reduced, and the error is compared with the lamplight inclination measurement to verify the reliability of the inclination measurement precision. The method for measuring the inclination of the optical fiber gyroscope in the long-distance horizontal freezing hole overcomes the difficulty that the optical fiber gyroscope cannot be used in the long-distance horizontal freezing hole, so that the inclination measurement precision is controlled within 5 per mill, and the requirement of the long-distance horizontal freezing hole on site on the precision is met.
Description
Technical Field
The invention relates to the technical field of freezing construction. In particular to a long-distance horizontal freezing hole optical fiber gyro inclination measuring method.
Background
The subway tunnel in soft soil is generally constructed by adopting a shield method. However, for some tunnel key nodes, such as subway tunnel communication channels, subway station transfer cross-crossing sections and the like, due to the complex shape, the tunnel key nodes are not suitable for being constructed by a shield method and can only be constructed by a mine method. And some newly-built subway tunnels pass below the bottom plate of the existing operation subway station and are influenced by obstacles such as underground continuous walls below the original station and the auxiliary structures thereof, anti-floating piles on the bottom plate of the original station and the like, so that the shield cannot pass through directly and can only pass through after the obstacles are removed by a mine method. Due to the complex environment and hydrogeological conditions of cities, foundation reinforcement must be performed in advance before excavation by a mining method. The artificial stratum freezing method (freezing method for short) is widely applied to water-rich stratum due to the advantages of good water sealing performance, high strength of reinforced soil body, strong adaptability, good safety and the like.
With the networking development of subways in recent years, the number of the stereo crossing is increased. Different from the communication channel and the shield in-out hole freezing project which are widely applied by the municipal freezing method in the past, the freezing length is not limited to be within 20 m. In the Shanghai road right horizontal freezing barrier-crossing project, the length of a freezing pipe reaches 42m, and the requirement of freezing hole inclination measurement is difficult to meet by adopting the traditional inclination measurement method. The method is limited by the traditional inclination measurement method, the freezing hole has high precision requirement, and the freezing drilling hole is easy to have large deflection risk due to the fact that the freezing hole penetrates through multiple obstacles, so that a reasonable mode is urgently needed to solve the problem of accurate inclination measurement of the long-distance horizontal freezing hole.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to solve the inclination measurement problem of the long-distance horizontal freezing hole and provide an optical fiber gyro inclination measurement method of the long-distance horizontal freezing hole.
In order to solve the technical problem, the invention provides the following technical scheme:
the long-distance horizontal freezing hole optical fiber gyro inclination measuring method comprises the following steps:
(A) and (3) processing the inclinometer: firstly, stretching a spiral inclinometer pipe, and carrying out 30-degree conical head-shaped treatment on the end head of the inclinometer pipe in a hot melting mode;
(B) and (3) lowering the inclinometer: keeping the inclinometer pipe to be placed in the horizontal freezing hole at a constant speed;
(C) connecting the fiber optic gyro inclinometer: welding a connecting component at the rear end part of the fiber-optic gyroscope inclinometer in a welding mode, and hinging the connecting component with a gyroscope connecting component of the fiber-optic gyroscope inclinometer by adopting a plastic through-wall wire with the cross section diameter of 25 mm;
(D) lowering and pulling out the fiber optic gyroscope inclinometer: firstly, the fiber optic gyroscope inclinometer is lightly placed in an inclinometer pipe, and then the fiber optic gyroscope inclinometer is slowly conveyed into the inclinometer pipe at a constant speed or pulled out of the inclinometer pipe;
(E) the inclination measuring method of the fiber optic gyroscope inclinometer comprises the following steps: taking points every 3-5m during the process of conveying the fiber optic gyroscope inclinometer to the bottom of the hole, and measuring each point for 3 times; adopting the same point collecting method in the process of pulling out the fiber optic gyroscope inclinometer, wherein the point collecting positions are the same;
(F) and (3) processing the data of the fiber optic gyroscope inclinometer: and (3) firstly removing singular points from the data acquired by each point, and then carrying out average value processing.
In the inclination measuring method of the long-distance horizontal freezing hole fiber-optic gyroscope, the inclination measuring pipe in the step (A) is made of PE material, and the size is phi 73 x 5 mm.
The inclination measuring method of the long-distance horizontal freezing hole fiber-optic gyroscope comprises the following steps: the lowering speed of the inclinometer tube was 0.2 m/s.
The inclination measuring method of the long-distance horizontal freezing hole fiber-optic gyroscope comprises the following steps: the hinged connection adopts a screw as a connecting bearing, the length of the screw is 2-3 cm, and the screw can freely rotate around the axis between the plastic wall penetrating wire and the optical fiber gyro inclinometer.
The inclination measuring method of the long-distance horizontal freezing hole fiber optic gyroscope comprises the following steps: the speed of the plastic wall penetrating line for conveying or pulling out at constant speed is 0.1 m/s.
The inclination measuring method of the long-distance horizontal freezing hole fiber optic gyroscope comprises the following steps of: the measuring points comprise an initial end point of the inclinometer pipe and a bottom point of the inclinometer pipe.
The inclination measuring method of the long-distance horizontal freezing hole fiber optic gyroscope comprises the following steps: if the number of the singular points exceeds half of the number of the measurement points, the lower pipe measurement should be carried out again.
According to the inclination measuring method of the long-distance horizontal freezing hole fiber optic gyroscope, the through-wall line is required to be kept in a loose state when a point is taken in each measurement; when the fixed point is taken, the point is taken for measurement after the gyro is static for 1-2 s.
The technical scheme of the invention achieves the following beneficial technical effects:
according to the requirement of accurate inclination measurement of the long-distance freezing hole (the long-distance horizontal freezing hole means that the length of the freezing hole exceeds 20 m), the influence of the inner coupling is overcome by adopting a mode of lowering the inclination measuring pipe according to the characteristic that the inner coupling exists in the long-distance horizontal freezing hole. Furthermore, reasonable downward material of the fiber optic gyro inclinometer is selected, the connecting node of the fiber optic gyro inclinometer is improved, and a plastic through-wall wire is hinged with the fiber optic gyro inclinometer, so that the constraint on the movement state of the fiber optic gyro inclinometer in the process of conveying and pulling out the fiber optic gyro inclinometer is overcome. Furthermore, according to the principle and the characteristics of the fiber optic gyroscope inclinometer, the inclination data result is reliable by improving the point taking mode, the lowering speed and the pulling speed, and the complete method for accurately measuring the inclination in the long-distance horizontal freezing hole is realized for the first time. The method is tested in Shanghai No. 18 line state right road horizontal obstacle clearing engineering, and mutual verification is carried out by the method and a traditional inclination measuring method, so that the reliability of the inclination measuring method is further proved; the method overcomes the inclination measurement difficulty that the optical fiber gyroscope cannot be used in the long-distance horizontal freezing hole, controls the inclination measurement precision within 5 per mill, and meets the requirement of the long-distance horizontal freezing hole on site on precision.
Drawings
FIG. 1 is a schematic diagram of a fiber optic gyro inclinometer in a freezing tube.
Fig. 2 is a schematic diagram of an inclinometer section of the fiber optic gyroscope inclinometer.
In the figure: 1-a through-wall wire; 2-an inner collar; 3-a hinge point; 4-fiber optic gyro inclinometer; 5-an inclinometer pipe; 6-freezing the tube.
Detailed Description
As shown in fig. 1 and fig. 2, the long-distance horizontal freezing hole fiber-optic gyroscope inclination measurement method of the embodiment is tested in the Shanghai No. 18 wire country right road horizontal obstacle clearing project, the freezing pipes are phi 108 x 10 seamless steel pipes, and two adjacent freezing pipes are seamlessly welded at a distance of 0.5 mm; the inner diameter of the inner collar is 79 mm; the outer diameter of the fiber optic gyro inclinometer is 40 mm; the method specifically comprises the following steps:
(A) and (3) processing the inclinometer: firstly, stretching a coiled inclinometer pipe, and carrying out 30-degree conical head-shaped treatment on the end head of the inclinometer pipe in a hot melting mode to enable the end head of the inclinometer pipe to be in conical closure, so that the influence of an internal ferrule on the descending of the inclinometer pipe is avoided, the inclinometer pipe can be smoothly underground put in practice, sundries in a freezing pipe are prevented from entering the inclinometer pipe, the influence of the sundries entering the inclinometer pipe on the descending and pulling out of an optical fiber gyro inclinometer in the inclinometer pipe is eliminated, and the measurement accuracy of the optical fiber gyro inclinometer is improved; the inclinometer tube used in this example is made of PE and has a dimension of phi 73 x 5 mm.
(B) And (3) lowering the inclinometer: keeping the inclinometer pipe to be placed in the horizontal freezing hole at a constant speed; the lowering speed of the inclinometer tube was 0.2 m/s.
(C) Connecting the fiber optic gyro inclinometer: the connecting mode of the traditional fixed connection is changed, the connecting component is welded at the rear end part of the fiber-optic gyroscope inclinometer in a welding mode, and a plastic through-wall wire with the cross section diameter of 25mm is hinged with the gyroscope connecting component of the fiber-optic gyroscope inclinometer; the hinged connection adopts a screw as a connecting bearing, the length of the screw is 3cm, and the screw can be kept to rotate freely by taking the screw as an axis between the plastic wall penetrating wire and the fiber optic gyroscope inclinometer.
(D) Lowering and pulling out the fiber optic gyroscope inclinometer: firstly, lightly placing the fiber optic gyroscope inclinometer in an inclinometer, and then slowly conveying the fiber optic gyroscope inclinometer into the inclinometer or pulling out the inclinometer at a constant speed; the speed of the plastic wall penetrating line for conveying or pulling out at constant speed is 0.1 m/s.
(E) The inclination measuring method of the fiber optic gyroscope inclinometer comprises the following steps: taking points every 3-5m during the process of conveying the fiber optic gyroscope inclinometer to the bottom of the hole, and measuring each point for 3 times; adopting the same point collecting method in the process of pulling out the fiber optic gyroscope inclinometer, wherein the point collecting positions are the same; the measuring points comprise an initial end point of the inclinometer pipe and a bottom point of the inclinometer pipe. When measuring and taking points each time, the wall penetrating wire should keep a loose state; when the fixed point is taken, the point is taken for measurement after the gyro is static for 1-2 s.
(F) And (3) processing the data of the fiber optic gyroscope inclinometer: and (3) firstly removing singular points from the data acquired by each point, and then carrying out average value processing. If the number of the singular points exceeds half of the number of the measurement points, the lower pipe measurement should be carried out again.
According to the requirement of accurate inclination measurement of the long-distance horizontal freezing hole (the length of the long-distance horizontal freezing hole is more than 20 m), the influence of the inner coupling is overcome by adopting a mode of lowering the inclination measuring pipe according to the characteristic that the inner coupling exists in the long-distance horizontal freezing hole. Furthermore, reasonable downward material (plastic through-wall wire) of the fiber-optic gyroscope inclinometer is selected, the connecting node of the fiber-optic gyroscope inclinometer is improved, the plastic through-wall wire is hinged with the fiber-optic gyroscope inclinometer, and the constraint on the motion state of the fiber-optic gyroscope inclinometer in the process of conveying and pulling out the fiber-optic gyroscope inclinometer is overcome. Furthermore, according to the principle and the characteristics of the fiber optic gyroscope inclinometer, the inclination data result is reliable by improving the point taking mode, the lowering speed and the pulling speed, and the complete method for accurately measuring the inclination in the long-distance freezing hole is realized for the first time. The method is tested in Shanghai No. 18 line state right road horizontal obstacle clearing engineering, and mutual verification is carried out by the method and a traditional inclination measuring method, so that the reliability of the inclination measuring method is further proved; the method overcomes the inclination measurement difficulty that the optical fiber gyroscope cannot be used in the long-distance horizontal freezing hole, controls the inclination measurement precision within 5 per mill, and meets the requirement of the long-distance horizontal freezing hole on site on precision.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are possible which remain within the scope of the appended claims.
Claims (8)
1. The long-distance horizontal freezing hole optical fiber gyro inclination measuring method is characterized by comprising the following steps of:
(A) and (3) processing the inclinometer: firstly, stretching a spiral inclinometer pipe, and carrying out 30-degree conical head-shaped treatment on the end head of the inclinometer pipe in a hot melting mode;
(B) and (3) lowering the inclinometer: keeping the inclinometer pipe to be placed in the horizontal freezing hole at a constant speed;
(C) connecting the fiber optic gyro inclinometer: welding a connecting component at the rear end part of the fiber-optic gyroscope inclinometer in a welding mode, and hinging the connecting component with a gyroscope connecting component of the fiber-optic gyroscope inclinometer by adopting a plastic through-wall wire with the cross section diameter of 25 mm;
(D) lowering and pulling out the fiber optic gyroscope inclinometer: firstly, the fiber optic gyroscope inclinometer is lightly placed in an inclinometer pipe, and then the fiber optic gyroscope inclinometer is slowly conveyed into the inclinometer pipe at a constant speed or pulled out of the inclinometer pipe;
(E) the inclination measuring method of the fiber optic gyroscope inclinometer comprises the following steps: taking points every 3-5m during the process of conveying the fiber optic gyroscope inclinometer to the bottom of the hole, and measuring each point for 3 times; adopting the same point collecting method in the process of pulling out the fiber optic gyroscope inclinometer, wherein the point collecting positions are the same;
(F) and (3) processing the data of the fiber optic gyroscope inclinometer: and (3) firstly removing singular points from the data acquired by each point, and then carrying out average value processing.
2. The method of claim 1, wherein the inclinometer tube in step (a) is made of PE and has a dimension of phi 73 x 5 mm.
3. The long-reach horizontal freeze hole fiber optic gyro inclinometer method according to claim 1, characterized in that in step (B): the lowering speed of the inclinometer tube was 0.2 m/s.
4. The long-reach horizontal freeze hole fiber optic gyro inclinometer method according to claim 1, characterized in that in step (C): the hinged connection adopts a screw as a connecting bearing, the length of the screw is 2-3 cm, and the screw can freely rotate around the axis between the plastic wall penetrating wire and the optical fiber gyro inclinometer.
5. The long-reach horizontal freeze hole fiber optic gyro inclinometer method according to claim 1, characterized in that in step (D): the speed of the plastic wall penetrating line for conveying or pulling out at constant speed is 0.1 m/s.
6. The long-reach horizontal freeze hole fiber optic gyro inclinometer method according to claim 1, characterized in that in step (E): the measuring points comprise an initial end point of the inclinometer pipe and a bottom point of the inclinometer pipe.
7. The long-reach horizontal freeze hole fiber optic gyro inclinometer method according to claim 1, characterized in that in step (F): if the number of the singular points exceeds half of the number of the measurement points, the lower pipe measurement should be carried out again.
8. The long-reach horizontal freezing hole fiber optic gyro inclinometer method according to claim 1, characterized in that the through-wall wires should be kept in a loose state each time a point is taken by measurement; when the fixed point is taken, the point is taken for measurement after the gyro is static for 1-2 s.
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| CN111622200A (en) * | 2020-05-27 | 2020-09-04 | 四川省川建勘察设计院 | Three-dimensional deformation measuring method for inclinometer tube |
| CN113653485A (en) * | 2021-08-11 | 2021-11-16 | 北京中煤矿山工程有限公司 | Posture stabilizing device and inclination measuring method of long-distance horizontal freezing hole fiber optic gyroscope inclinometer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU480829A1 (en) * | 1973-05-10 | 1975-08-15 | Всесоюзный Научно-Исследовательский И Проектно-Конструкторский Институт По Осушению Месторождений Полезных Ископаемых Специальным Горным Работам, Рудничной Геологии И Маркшейдерскому Делу | Instrument for measuring the curvature of horizontal and inclined wells |
| CN201696030U (en) * | 2010-02-08 | 2011-01-05 | 北京中煤矿山工程有限公司 | Continuous gyro inclinometer with minor diameter and high accuracy |
| CN204101050U (en) * | 2014-09-28 | 2015-01-14 | 中煤邯郸特殊凿井有限公司 | Gyro centralizer for retest of freezing hole |
-
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- 2019-10-24 CN CN201911016486.7A patent/CN110863477B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU480829A1 (en) * | 1973-05-10 | 1975-08-15 | Всесоюзный Научно-Исследовательский И Проектно-Конструкторский Институт По Осушению Месторождений Полезных Ископаемых Специальным Горным Работам, Рудничной Геологии И Маркшейдерскому Делу | Instrument for measuring the curvature of horizontal and inclined wells |
| CN201696030U (en) * | 2010-02-08 | 2011-01-05 | 北京中煤矿山工程有限公司 | Continuous gyro inclinometer with minor diameter and high accuracy |
| CN204101050U (en) * | 2014-09-28 | 2015-01-14 | 中煤邯郸特殊凿井有限公司 | Gyro centralizer for retest of freezing hole |
Non-Patent Citations (1)
| Title |
|---|
| 淤泥质黏土层长距离穿障水平冻结孔施工技术;郑新赟等;《建井技术》;20181025;第39卷(第5期);第57-60页 * |
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