AU2021103747A4 - Deep Displacement Monitoring Device and Method - Google Patents
Deep Displacement Monitoring Device and Method Download PDFInfo
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- AU2021103747A4 AU2021103747A4 AU2021103747A AU2021103747A AU2021103747A4 AU 2021103747 A4 AU2021103747 A4 AU 2021103747A4 AU 2021103747 A AU2021103747 A AU 2021103747A AU 2021103747 A AU2021103747 A AU 2021103747A AU 2021103747 A4 AU2021103747 A4 AU 2021103747A4
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000012806 monitoring device Methods 0.000 title claims abstract description 17
- 239000000523 sample Substances 0.000 claims abstract description 49
- 238000012544 monitoring process Methods 0.000 claims abstract description 47
- 239000002689 soil Substances 0.000 claims abstract description 10
- 238000005259 measurement Methods 0.000 claims description 7
- 238000012937 correction Methods 0.000 abstract description 6
- 230000005484 gravity Effects 0.000 abstract description 5
- 230000008859 change Effects 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012800 visualization Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 235000002492 Rungia klossii Nutrition 0.000 description 1
- 244000117054 Rungia klossii Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
- G01B5/0009—Guiding surfaces; Arrangements compensating for non-linearity there-of
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Nonlinear Science (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geophysics (AREA)
- Remote Sensing (AREA)
- Radar, Positioning & Navigation (AREA)
- Geochemistry & Mineralogy (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses a deep displacement monitoring device and method for slope and
foundation pit engineering, which comprises an inclinometer tube and a probe, wherein the
probe is provided with a guide wheel, the inner wall of the inclinometer tube is provided with
a guide groove, the guide wheel is matched with the guide groove. It is characterized in that
comprising an angle measuring instrument which is used for measuring the torsion angle of the
inclinometer in the horizontal direction around its own axis in the monitoring process. The
angle measuring instrument is a compass instrument, and the compass instrument and the probe
twist around the axis of the inclinometer at the same angular velocity. By obtaining the
horizontal torsion angle of the inclinometer tube, the horizontal displacement of the slope when
the inclinometer tube is horizontally twisted is corrected, and the horizontal displacement
correction value is obtained. The invention eliminates the influence of disconnection and
torsion of the inclinometer tube under the larger gravity of the surrounding soil layer on the
accuracy of monitoring data of deep slope and foundation pit inclinometer, reduces monitoring
errors, corrects monitoring data in time, and provides more accurate and timely data for
horizontal displacement monitoring of slope and foundation pit.
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Figure 7
Description
6/9
812 8 13 7AA 6
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Figure 7
Deep Displacement Monitoring Device and Method
The invention belongs to the field of horizontal displacement monitoring of slope
and foundation pit engineering, and in particular relates to a deep displacement
monitoring device and method suitable for horizontal displacement detection and
error correction of deep landslides.
As we all know, in slope and foundation pit engineering, the deep deformation
law of slope is an important index to evaluate slope stability. At present, the horizontal
displacement monitoring of slope and foundation pit can be divided into surface
observation and deep observation, in which the latter is carried out by vertically
drilling holes on slope and installing inclinometer, and the feedback accuracy of
surface and deep horizontal displacement is high, which is also the most common and
reliable choice. However, during the deep displacement monitoring of slope and
foundation pit, especially in the process of slope survey of deep and extremely deep
landslide, the inclinometer is easy to break away and get stuck under the heavy
gravity of surrounding soil layer, and twist. Torsion of inclinometer tube has an
impact on the accuracy of monitoring data of deep landslide inclinometer based on the
inner wall of inclinometer tube. Inaccurate monitoring data leads to inaccurate
engineering monitoring data and false alarm in early warning. If the warning is
advanced, the construction will be affected, and if the warning is delayed, there will
not be enough time to prevent the occurrence of engineering hazards. When monitoring the deep displacement of slope and foundation pit, it is necessary to obtain the monitoring data accurately and correct the errors in time. Therefore, in engineering construction, there is an urgent need for a correction technology of deep landslide inclinometer monitoring to improve the monitoring accuracy and provide timely and effective early warning for the instability of slope and foundation pit engineering, which has far-reaching social and economic significance.
The purpose of the present invention is to overcome the shortcomings of the
prior art, provide a device and method for monitoring the deep displacement of slope
and foundation pit, eliminate the influence on the accuracy of monitoring data of deep
slope and foundation pit inclinometer caused by disconnection and torsion of
inclinometer tube under the large gravity of surrounding soil layer, correct the
monitoring data in time, and provide more accurate and timely data for horizontal
displacement monitoring of slope and foundation pit engineering.
The technical scheme is as follows:
A deep displacement monitoring device comprises an inclinometer and a probe,
wherein the probe is provided with a guide wheel, the inner wall of the inclinometer is
provided with a guide groove, the guide wheel is matched with the guide groove, and
the guide wheel moves up and down in the inclinometer along the guide groove
during measurement.
Further, the angle measuring instrument is a gyroscope.
Further, the angle measuring instrument is a compass instrument, and the compass instrument and the probe twist around the axis of the inclinometer at the same angular velocity.
Further, the compass instrument is arranged on a plane perpendicular to the axis
of the probe.
Furthermore, the compass instrument and the probe are provided with a
connecting structure, one end of which is fixedly connected with the probe, and the
other end of which is fixedly connected with the compass instrument.
Furthermore, the connecting structure is a compass instrument mounting bracket,
which is rigidly connected with the probe into a whole through the compass mounting
bracket, and one end of the compass instrument mounting bracket is fixedly
connected with the end or the rod of the probe, and the other end is fixedly
connected with the compass instrument.
Furthermore, a camera is installed above the compass instrument for recording
the deflection angle of the compass in the compass instrument during monitoring.
Further, it also comprises a camera bracket, wherein the camera is fixed above
the compass instrument through the camera bracket, and the camera bracket is fixedly
connected with the end of the probe or the rod.
To sum up, the camera is installed in the following ways: 1) It is installed on the
head end face of the probe, and the connection way includes screw connection or snap
connection. 2) Connect with the probe through the camera mounting bracket;
Further, the camera bracket is fixedly connected with the compass mounting
bracket.
Furthermore, it also comprises a display, wherein the output end of the camera is
connected with the input end of the display through a data line, and the display
monitors the deflection angle of the compass in real time. In another scheme, the
camera and the display wirelessly transmit data.
A deep displacement monitoring method is characterized by comprising the
following steps:
Step (1): Installing an inclinometer tube in a side slope and a foundation pit, and
backfilling gaps around the inclinometer tube;
Step (2): Let the end face of the inclinometer tube be XY plane, the center line
aa' relative to the guide groove be X axis, the center line bb' perpendicular to X axis
be Y axis, the depth direction of the inclinometer tube be Z axis, the probes extend
into the bottom of the inclinometer tube, and measure from bottom to top along the Z
axis direction, and obtain the inclination angle P i relative to the Z axis at different
depths H i. The horizontal displacement 1 of slope at any depth is calculated by the
formula L i =H i *tani, and the horizontal displacement L of soil is calculated by
the following summation formula (1);
The value range of inclination angle P i is between 0 and 45°.
Step (3): Obtaining the torsion angle a i of the XY plane of the inclinometer tube,
and obtaining the corrected horizontal displacement L' of the soil under the condition
of horizontal torsion of the inclinometer tube by formula (2);
The value range of twist angle a i is between 0 °to 45°.
The step flow chart of the monitoring method of the technical scheme is shown in Figure 1. The realization principle of this technical scheme is as follows:
I. Derivation of calculation method formula
As shown in figure 2, there is a relationship between horizontal displacement L
and depth H and inclination angle , which is L=H*tanp. Given the height H from
the hole bottom at L5 and the measured inclination angle P 5, then L 5 =H*tan 5,
and the measured angle offset at L 4 is 4, then L 4 =H 0 *tan 4, use the
summation formula (1) in the above method to calculate the horizontal displacement 1
at different depths H i of the inclinometer tube, and get the deformation curve fitted
graphically (reference sign 2 in figure 2). Compared with the initial reference axis
(reference 1 in figure 2), it shows the changing movement of lateral migration of
stratum.
Under common circumstances, the guide grooves of the inclinometer are on the
same straight line, and the inclinometer bends in the sliding direction after being
stressed. Figure 4 shows the deformation curve of the inclinometer under normal
conditions. Figure 5 shows the deformation curve of the inclinometer under torsion.
The guide grooves of the twisted inclinometer are not on the same straight line, and
the direction of the deformation curve will be messy. Figure 6 shows the deformation
curve of the deviated inclinometer. The deviated inclinometer may be caused by loose
screws or sliding torsion of landslide, or both. The guide wheel of the inclinometer
probe is easy to derail to another track at the disjoint position, which is very likely to
cause the inversion of deformation data, which is manifested in the inversion and
large fold on the inclinometer curve.
The technical scheme is to solve that how to correct the horizontal displacement
L of soil when the inclinometer tube is twisted or disconnected.
During monitoring, the guide wheel on the probe matches with the guide groove
on the inclinometer tube, so the torsion angle of the inclinometer tube is equal to the
torsion angle of the probe. Since the compass instrument can rotate at the same
angular speed as the probe, the torsion angle of the compass instrument is equal to the
torsion angle of the inclinometer. Because the direction of the compass pointer is
fixed, the torsion angle of the compass instrument is equal to the deflection angle of
the compass. The above equality relation is described as follows: as shown in figure 8,
let the center line of the guide wheel of the probe be cc', the center line of the guide
groove of the inclinometer be bb'; the included angle between the compass pointing
axis and the north-south pointing scale line SN of the compass instrument be y, and
the horizontal torsion angle of the inclinometer during monitoring is a. Since the
guide wheel and the guide groove are matched with each other, the central connecting
line cc' of the guide wheel and the central connecting line bb' of the guide groove
return. It is assumed that before the probe of this device enters the inclinometer for
measurement, the connecting line cc' of the center of the two guide wheels of the
probe and the connecting line of the north-south pointing SN scale in the compass
instrument are coincident or parallel. When the inclinometer buried in the rock
stratum is in normal condition without horizontal torsion, if the included angle y
between the pointing axis of compass and the connecting line of the north-south
pointing SN scale of compass is the initial value yo. When the inclinometer twists under stress, the guide groove on the inclinometer drives the guide wheel on the probe to twist at the same time. A connecting line cc' of the guide wheel and a connecting line bb' of the guide groove rotate at the same time. Because a connecting structure is arranged between the casing of the compass instrument and the two guide wheels, the compass instrument and the guide wheel rotate at the same angular speed, but the pointer direction of the compass is fixed. The included angle between the pointing axis of the compass and the connecting line of the north-south pointing scale SN in the compass instrument changes to y 1 with the torsion of the inclinometer, and the change value y 1-y o of the included angle y between them is equal to the torsion angle a of the inclinometer. To sum up, according to the equal relationship between the deflection angle of compass and the torsion angle of inclinometer tube, the deflection angle y of compass is obtained by camera, so as to obtain the torsion angle a of inclinometer tube. By calculating and correcting the original horizontal displacement
L, the horizontal displacement correction value L' of slope is obtained when the
inclinometer tube is horizontally twisted.
II. Methods for obtaining relevant data in formulas:
1. In formula (1) of the above monitoring method, the depth H i and the
inclination angle P i are obtained by the probe. It belongs to the prior art that the probe acquires the depth H i and the inclination
angle P i, and the inclination of the probe is measured by two servo accelerometers
with balanced force. An accelerometer measures the longitudinal position of the guide
groove of the inclinometer, that is, the inclination of the plane where the guide wheel on the probe is located. The other accelerometer measures the inclination angle perpendicular to the plane of the guide wheel. The depth H i and inclination angleP i acquired by the probe are transmitted to relevant terminals through data cables or wireless signals, and the terminals can be data acquisition instruments or handheld terminals.
2. In the formula (2) of the above monitoring method, the torsion angle Pi is
obtained by an angle measuring instrument.
The technical scheme aims at how to obtain the torsion angle P i. The deflection
angle of the compass obtained by the camera installed above the compass is the
torsion angle a i.
The camera is aimed at the compass instrument, and the compass deflection
angle y obtained by the camera is the torsion angle a i; When the inner groove of the
inclinometer tube is aligned with the sliding direction, the deflection angle of the
compass exceeds 450 , and the connecting line of the guide groove does not strictly
point to the sliding direction of the landslide, resulting in the reversal of the
inclinometer curve, so the inclinometer data will need reverse processing to correct.
Reverse processing means that if the direction of curve change does not point to
the sliding direction, the curve change is reversed by 180. At the same time, the
camera is aimed at all directions of the inner wall of the inclinometer tube and the
joint of the upper and lower inclinometer tubes. Through the display, the intact
condition of the guide wheel and the guide groove is observed in real time, and the
specific depth position of the guide wheel separating from the guide groove is judged.
The inclinometer data after separating from the guide groove is reversely processed
and corrected.
The technical scheme has the following beneficial effects: during deep slope
displacement monitoring, especially in the process of deep and extremely deep
landslide inclinometer, because of the deep landslide, the inclinometer tube is easily
disconnected and stuck under the large gravity of the surrounding soil layer, which
causes torsion, thus affecting the accuracy of monitoring data of deep landslide
inclinometer based on the inner wall of the inclinometer tube.
(1) The equipment and method for monitoring the deep displacement of slope
and foundation pit consider how to correct the horizontal displacement L in time when
the inclinometer is out of touch and twisted, so as to reduce the monitoring error of
inclinometer, improve the measurement accuracy and realize the real-time and
visualization of the horizontal displacement monitoring of slope. According to the
technical scheme, the characteristic that the pointer direction of the compass is fixed
is skillfully utilized, and the deflection direction of the compass is equal to the torsion
direction of the inclinometer tube through the connecting structure. Thereby obtaining
the torsion angle of the inclinometer tube, and calculating and correcting the original
horizontal displacement L to obtain the horizontal displacement correction value L' of
the slope when the inclinometer tube is horizontally twisted.
(2) By setting a camera above the compass, the deflection angle of the compass
can be obtained in real time, and the intact condition of the guide wheel and guide
groove can be observed. The specific position of the guide wheel derailment can be judged. The data after derailment can be corrected by reverse processing, thus improving the measurement accuracy and monitoring visualization.
According to the technical scheme, the influence of disconnection and torsion of
the inclinometer tube under the large gravity of the surrounding soil layer on the
accuracy of monitoring data for deep landslide inclinometer is eliminated, monitoring
errors are reduced, monitoring data are corrected in time, and more accurate and
timely data are provided for horizontal displacement monitoring of slopes and
foundation pits. Meanwhile, that method of the technical scheme is ingenious and
simple, and is easy to operate.
Figure 1 is a flow chart of monitoring method steps in the technical scheme.
Figure 2 is the schematic diagram of the formula for calculating horizontal
displacement 1 in this technical scheme.
Figure 3 shows the change of horizontal displacement caused by horizontal
torsion of inclinometer tube.
Figure 4 is a deformation graph obtained by monitoring under normal torsion
free condition.
Figure 5 is a deformation graph obtained by monitoring when the inclinometer is
twisted.
Figure 6 is a deformation graph obtained by monitoring when the inclinometer
tube is disconnected and twisted.
Figure 7 is a perspective view of a preferred scheme of a deep displacement monitoring device.
Figure 8 is a top view of a preferred scheme of a deep displacement monitoring
device.
Figure 9 is a side projection view of a preferred scheme of a deep displacement
monitoring device.
Figure 10 is the second preferred scheme of a deep displacement monitoring
device.
Icons: 1- reference axis; 2- deformation curve; 3- inclinometer tube; 4
inclinometer axis; 5- guide groove; 6- compass instrument; 7- compass; 8- camera; 9
probe; 10- guide wheel; 11- probe shaft; 12- probe end; 13- camera bracket; 14
compass mounting frame, 15- north-south pointing scale SN connecting line of
compass instrument, 16- camera data line, 17- cable, 18- slope and foundation pit, 19
compass pointing axis.
The present invention will be further described in detail with reference to
specific embodiments and figures. However, it should not be understood that the
scope of the above subject matter of the present invention is limited to the following
embodiments, and all technologies realized based on the contents of the present
invention belong to the scope of the present invention.
As shown in figure7tofigure 9, a deep displacement monitoring device
comprises an inclinometer tube (3) and a probe (9), wherein the probe (9) is provided
with a guide groove (5) on the inner wall of the inclinometer tube, and the guide wheel (10) is matched with the guide groove (5), and the guide wheel (10) runs along the guide groove during measurement. The device also comprises a compass instrument (6), which is used for measuring the horizontal twisting angle generated by the inclinometer tube (3) around its own axis (4).
The compass instrument (6) is arranged on a plane perpendicular to the axis of
the probe (9).
The compass instrument (6) is rigidly connected with the probe (9) through a
compass mounting bracket (14), and one end of the compass instrument mounting
bracket (14) is fixedly connected with the probe shaft (11), while the other end is
fixedly connected with the compass instrument (6). A camera (8) is arranged above
the compass instrument (6) and used for recording the deflection angle of the compass
(7) in the compass instrument (6) during monitoring. The camera (8) is fixed above
the compass instrument (6) through a camera bracket (13), and the camera bracket (13)
is fixedly connected with the compass mounting bracket (14).
It also comprises a display, wherein the output end of the camera is connected
with the input end of the display through a data line (16), and the display monitors the
deflection angle of the compass (7) in real time.
Figure 10 shows the second preferred scheme of a deep displacement monitoring
device, in which the camera is installed on the head end face of the probe and
connected by threads or snaps. The compass is fixedly connected with the end face of
the probe into a whole.
When that deep displacement monitor device of the technical scheme is used for monitor, the specific use steps are as follows:
Firstly, installing inclinometer tubes in side slopes and foundation pits, comprises
the following steps:
(1) Drilling: After the drilling rig is in place, drill holes at the key points of
landslide, and strictly control the verticality of the drill bit.
(2) Pipe running: Pre-connect the inclinometer before installation. Connect the
joints of two adjacent pipes closely. When connecting, the guide grooves should be
aligned strictly, and no deflection is allowed. To ensure that the guide grooves of
adjacent inclinometers will not be dislocated during formal installation, so that the
probe can slide unimpeded in the guide grooves.
(3) Grouting backfill: select backfill materials to fill the annular gap around the
inclinometer tube.
Secondly, the probe slides into the guide groove of the inclinometer tube through
the guide roller arranged on the head and enters the inclinometer tube for
measurement and records the monitoring data to obtain the horizontal displacement
correction value L' and the corrected deformation curve.
The above is only a preferred embodiment of the present invention, and is not
used to limit the present invention. Any modification, equivalent substitution,
improvement, etc., made by ordinary technicians in the field without paying any
creativity within the spirit and principle of the present invention shall be included in
the protection scope of the present invention.
Claims (10)
1. A deep displacement monitoring device comprises an inclinometer and a probe;
the probe is provided with a guide wheel; the inner wall of the inclinometer is
provided with a guide groove, the guide wheel is matched with the guide groove; the
guide wheel moves up and down in the inclinometer along the guide groove during
measurement.
2. The deep displacement monitoring device according to claim 1, wherein the
angle measuring instrument is a compass instrument, and the compass instrument and
the probe twist around the axis of the inclinometer at the same angular velocity.
3. The deep displacement monitoring device according to claim 2, wherein the
compass instrument and the probe are provided with a connecting structure, one end
of the connecting structure is fixedly connected with the probe, and the other end is
fixedly connected with the compass instrument.
4. A deep displacement monitoring device according to claim 3, which is
characterized in that the connecting structure is a compass instrument mounting
bracket, and the compass instrument is rigidly connected with the probe into a whole
through the compass mounting bracket; one end of the compass instrument mounting
bracket is fixedly connected with the end of the probe or the shaft, and the other end is
fixedly connected with the compass instrument.
5. The deep displacement monitoring device according to claim 2, wherein a
camera is installed above the compass instrument for recording the deflection angle of
the compass in the compass instrument during monitoring.
6. A deep displacement monitoring device according to claim 5, which is
characterized by comprising a camera bracket, wherein the camera bracket is fixed
above the compass instrument through the camera bracket, and the camera bracket is
fixedly connected with the end of the probe or the rod.
7. The deep displacement monitoring device according to claim 5, further
comprising a display, wherein the output end of the camera is connected with the
input end of the display through a data line, and the display monitors the deflection
angle of the compass in real time.
8. A deep displacement monitoring device according to claim 7, characterized in
that the camera and the display wirelessly transmit data.
9. The deep displacement monitoring device according to claim 1, wherein the
angle measuring instrument is a gyroscope.
10. A deep displacement monitoring method, characterized by comprising the
following steps:
(1) Install the inclinometer pipe in the slope and foundation pit, and backfill the
gap around the inclinometer pipe;
(2) Let the end face of the inclinometer tube be XY plane, the center line aa'
relative to the guide groove be X axis, the center line bb' perpendicular to X axis be Y
axis, the depth direction of the inclinometer tube be Z axis, the probes extend into the
bottom of the inclinometer tube, and measure from bottom to top along the Z axis
direction, and obtain the inclination angle P i relative to the Z axis at different depths;
The horizontal displacement L of slope at any depth is calculated by the formula L i
=H i *tan13 i, and the horizontal displacement L of soil is calculated by the
following formula (1);
The value of inclination angle P i ranges from 0 to 450
Thirdly, obtaining the torsion angle a i of the XY plane of the inclinometer tube,
and obtaining the corrected horizontal displacement L' of the soil under the condition
of horizontal torsion of the inclinometer tube by formula (2);
The twist angle a i ranges from 0 to 450
.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114059603A (en) * | 2021-10-29 | 2022-02-18 | 张锦圣 | Base pipe of inclinometer for civil engineering deep foundation pit |
| CN114197547A (en) * | 2021-12-24 | 2022-03-18 | 中交隧道工程局有限公司 | Subway foundation pit supporting construction mobile monitoring equipment |
| CN114482147A (en) * | 2022-01-18 | 2022-05-13 | 浙江中浩应用工程技术研究院有限公司 | Intelligent building foundation pit detector and detection method thereof |
| CN117537781A (en) * | 2024-01-10 | 2024-02-09 | 陕西中祥基础工程有限责任公司 | Inclination measuring device for foundation pit support |
-
2021
- 2021-06-30 AU AU2021103747A patent/AU2021103747A4/en not_active Ceased
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114059603A (en) * | 2021-10-29 | 2022-02-18 | 张锦圣 | Base pipe of inclinometer for civil engineering deep foundation pit |
| CN114197547A (en) * | 2021-12-24 | 2022-03-18 | 中交隧道工程局有限公司 | Subway foundation pit supporting construction mobile monitoring equipment |
| CN114482147A (en) * | 2022-01-18 | 2022-05-13 | 浙江中浩应用工程技术研究院有限公司 | Intelligent building foundation pit detector and detection method thereof |
| CN114482147B (en) * | 2022-01-18 | 2023-11-21 | 浙江中浩应用工程技术研究院有限公司 | Intelligent detector for building foundation pit and detection method thereof |
| CN117537781A (en) * | 2024-01-10 | 2024-02-09 | 陕西中祥基础工程有限责任公司 | Inclination measuring device for foundation pit support |
| CN117537781B (en) * | 2024-01-10 | 2024-04-09 | 陕西中祥基础工程有限责任公司 | Inclination measuring device for foundation pit support |
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