CN112344900B - Concrete arch dam valley amplitude absolute deformation monitoring device and monitoring method thereof - Google Patents
Concrete arch dam valley amplitude absolute deformation monitoring device and monitoring method thereof Download PDFInfo
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- CN112344900B CN112344900B CN202011190635.4A CN202011190635A CN112344900B CN 112344900 B CN112344900 B CN 112344900B CN 202011190635 A CN202011190635 A CN 202011190635A CN 112344900 B CN112344900 B CN 112344900B
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- G01—MEASURING; TESTING
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- 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
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- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
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Abstract
The invention relates to the technical field of hydraulic and hydroelectric engineering safety monitoring, and discloses a concrete arch dam valley amplitude absolute deformation monitoring device which comprises two horizontal displacement observation piers and a complete station and a prism which are matched with measuring equipment of the two horizontal displacement observation piers, wherein an inclinometer and a matched inclinometer are installed on a drilling hole in each horizontal displacement observation pier, each horizontal displacement observation pier comprises a concrete pier body and a forced centering base, the complete station or the prism can be placed on the forced centering base, the drilling hole positions of the inclinometer are positioned on the central lines of the horizontal displacement observation piers at two ends of a valley amplitude measuring line and are parallel to the direction of a cross river valley, and the inclinometer is matched with the inclinometer. The invention also discloses a monitoring method of the concrete arch dam valley amplitude absolute deformation monitoring device. The device and the method for monitoring the absolute deformation of the valley amplitude of the concrete arch dam solve the defects and the defects that the measured value obtained by the existing observation method is relative deformation, realize the truth and the absolute of the measured value and provide truthful and reliable data support for slope stability analysis.
Description
Technical Field
The invention relates to the technical field of safety monitoring of hydraulic and hydroelectric engineering, in particular to a concrete arch dam valley amplitude absolute deformation monitoring device and a monitoring method thereof.
Background
In recent years, as a batch of high arch dams such as a li's gorge (165m), a raschive (250m), a beach (240m), a bay (292m), a stream luohuadu (278m), a brocade first-class (305m) and the like are built and put into operation, the problem of bank deformation caused by the rise of the reservoir water level after the high dam reservoir is built begins to appear, and the problem of valley amplitude deformation is gradually emphasized.
The method is characterized in that relatively obvious valley amplitude contraction is monitored in the short term after water storage of arch dams such as the Li's gorges (165m), the Jinpingyi (305m), the Xiluodi (278m) and the like, and the arch dams have a continuous deformation trend, and the valley amplitude contraction amounts are respectively about 30mm, 10mm and 60mm, which exceeds general engineering experience and law knowledge.
The valley amplitude deformation is a common problem faced by a high arch dam, and although the possibility of failure and damage of the arch dam body is low, if the valley amplitude deformation is directly acted on the arch dam body, the foundation damage or local cracking of the dam body can be caused, a leakage channel is formed, the normal operation of the arch dam is influenced, and even the overall safety is threatened.
The valley width refers to the width of the river valley on both sides. The valley amplitude deformation of the high arch dam canyon region is the superposition of horizontal deformation values of side slope surface monitoring points which are opposite and face to each other and have the same elevation on two sides of the canyon. The observation of the deformation of the valley amplitude is a deformation observation means which sets surface measuring points (namely valley amplitude measuring lines) on two sides of a river valley according to certain requirements, observes the distance between the two points (namely the length of the valley amplitude) to obtain observation data of each period, and obtains deformation information of a slope body by analyzing the change of the observation data of each period. The commonly used monitoring method is mainly to arrange surface displacement observation piers at two ends of a valley amplitude measuring line and obtain a valley amplitude deformation measuring value by measuring the horizontal displacement variation of the two points. Because the surface displacement observation pier is located on the rock-soil mass of the two-bank side slope, the deformation measured by the traditional method comprises two parts of deformation of 'self deformation of the side slope surface + contraction deformation of valley amplitude', the absolute deformation of the valley amplitude cannot be effectively measured by the traditional method, the deformation rule of the valley amplitude of the high arch dam cannot be accurately mastered, and certain difficulty is brought for solving the key scientific problem of valley amplitude contraction commonly faced by a 300 m-level high arch dam.
Disclosure of Invention
The invention aims to provide a device and a method for monitoring the absolute deformation of the valley amplitude of a concrete arch dam aiming at the defects of the prior art, so that the defect and the defect that the measured value obtained by the existing observation method is relative deformation are overcome, the true and absolute measured value is realized, and the true and reliable data support is provided for slope stability analysis.
In order to achieve the purpose, the device for monitoring the absolute deformation of the valley amplitude of the concrete arch dam comprises two horizontal displacement observation piers, a total station and a prism, wherein the two horizontal displacement observation piers are arranged on the slopes of two sides of a valley and are arranged at two ends of a valley amplitude measuring line, and a matched measuring device of the total station and the prism are arranged on the slopes of the two sides of the valley, an inclinometer and a matched inclinometer are installed on a drilling hole in each horizontal displacement observation pier, each horizontal displacement observation pier comprises a concrete pier body and a forced centering base arranged at the top of the concrete pier body, the total station or the prism can be arranged on the forced centering base, an inclinometer is arranged on each concrete pier body, the drilling hole position of each inclinometer is arranged on the center line of the horizontal displacement observation piers at two ends of the valley amplitude measuring line and is parallel to the direction of a cross valley, each inclinometer is provided with a corresponding device, a protective cover for protecting the forced centering base is arranged on the forced centering base, and each inclinometer comprises a probe, The device comprises a reading instrument and a cable for connecting the probe and the reading instrument, wherein a probe cavity is arranged in the probe, an acceleration sensor for acquiring on-way inclination data is arranged in the probe cavity, and the inclination measuring device runs in an inclination measuring pipe embedded in a soil body along the axial direction (the vertical direction) to measure horizontal displacement.
Preferably, the periphery of the probe is provided with a plurality of pulley assemblies.
Preferably, four vertical guide grooves are formed in the inner wall of the inclinometer, the four guide grooves are distributed in a cross manner, two of the guide grooves are parallel to the direction of a transverse river valley, the other two guide grooves are parallel to the direction of the river valley, and the pulley assembly moves in the guide grooves to assist the probe to move along the way.
Preferably, the cable is provided with scales, and the scales are used for transmitting electric signals and also used as a depth measuring ruler.
Preferably, the end of the probe is provided with a cushion pad for cushioning the probe from impact when it falls into contact with the bottom sealing head.
Preferably, the bottom end opening of the inclinometer pipe is sealed by a sealing head, so that foreign matters are prevented from entering the inclinometer pipe.
A monitoring method of the concrete arch dam valley amplitude absolute deformation monitoring device comprises the following steps of measuring the distance between two end point horizontal displacement observation piers of a valley amplitude measuring line and measuring the horizontal displacement of the horizontal displacement observation pier relative to a deep rock mass stable part, wherein the measuring of the distance between the two end point horizontal displacement observation piers of the valley amplitude measuring line comprises the following steps:
a) measuring the distance between two horizontal displacement observation piers of two end points of the valley amplitude measuring line by using a total station and a prism, installing the prism on a left bank horizontal displacement observation pier for the first time, installing the total station on a right bank horizontal displacement observation pier, observing once from right to left and recording the time data;
b) measuring the distance between two horizontal displacement observation piers of two end points of the valley amplitude measuring line by using a total station and a prism, mounting the prism on a right bank horizontal displacement observation pier for the second time, mounting the total station on a left bank horizontal displacement observation pier, observing once from left to right and recording the data;
c) averaging the data obtained in the step a) and the step b) to obtain the distance between two end points of the valley amplitude measuring line;
the measurement of the horizontal displacement observation pier relative to the deep rock mass stable part comprises the following steps:
d) placing the probe at the bottom of the inclinometer pipe on the concrete pier body on one side, and then recording inclination data of the probe in the process of lifting the probe from the bottom of the inclinometer pipe to a pipe orifice;
e) the probe is put forward, the probe is placed into the inclinometer after being rotated by 90 degrees along the clockwise direction or the anticlockwise direction, and the step d) is repeated to obtain inclination data of the probe measured for the 2 nd time;
f) the probe is put forward, the probe is put into the inclinometer after being continuously rotated for 90 degrees along the same direction, and the step d) is repeated to obtain inclination data of the probe measured for the 3 rd time;
g) the probe is put forward, the probe is put into the inclinometer after being continuously rotated for 90 degrees along the same direction, and the step d) is repeated to obtain inclination data of the probe measured for the 4 th time;
h) averaging the inclination data obtained in the step d) and the step f) to obtain inclination data in the direction, averaging the inclination data obtained in the step e) and the step g) to obtain inclination data in the other direction, and calculating to obtain the on-way horizontal displacement of the inclinometer by combining the height of each lifting of the probe;
i) repeating the steps d) to h), and calculating to obtain the on-way horizontal displacement of the inclinometer pipe on the concrete pier body on the other side;
and then, obtaining the absolute deformation of the valley amplitude by superposition according to the distance between the horizontal displacement observation piers at the two ends of the valley amplitude measuring line obtained in the step c) and the on-way horizontal displacement of the two inclinometer pipes.
Preferably, in the steps d) to g), the unit distance of each lifting of the probe is 0.5 m.
Compared with the prior art, the invention has the following advantages:
1. the absolute deformation of the valley amplitude of the high arch dam can be truly and accurately measured, the deformation rule of the valley amplitude of the high arch dam can be effectively mastered, and a powerful foundation is provided for solving the key scientific problem of valley amplitude contraction commonly faced by the 300 m-level high arch dam;
2. the method provides detailed and accurate safety monitoring data for avoiding the problems that the valley width shrinkage directly acts on the arch dam body to cause foundation damage or local cracking of the dam body, form a leakage channel, influence the normal operation of the arch dam, threaten the safety of the dam and the like.
Drawings
FIG. 1 is a diagram of the field layout of the concrete arch dam valley amplitude absolute deformation monitoring device of the present invention;
FIG. 2 is a schematic view of the placement of the total station on the horizontal displacement observation pier of FIG. 1;
FIG. 3 is a schematic view of a prism placed on the horizontal displacement observation pillar of FIG. 1;
FIG. 4 is a schematic structural view of the inclinometer of the present invention;
FIG. 5 is a schematic view of the working principle of the inclinometer device in the inclinometer pipe of the present invention;
FIG. 6 is a schematic view of the chute inner wall guide of FIG. 1.
The components in the figures are numbered as follows:
the device comprises a total station 1, a prism 2, a valley amplitude measuring line 3, a horizontal displacement observation pier 4, a concrete pier body 5, a forced centering base 6, an inclinometer tube 7, a probe 8, a reading instrument 9, a cable 10, a probe cavity 11, an acceleration sensor 12, a pulley assembly 13, a guide groove 14, a protective cover 15, a cushion pad 16 and a sealing head 17.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
As shown in fig. 1,2 and 3, the concrete arch dam valley amplitude absolute deformation monitoring device of the invention comprises two horizontal displacement observation piers 4 arranged on the slopes of two banks of a valley and arranged at two ends of a valley amplitude measuring line 3, a total station 1 and a prism 2 which are matched with the horizontal displacement observation piers, wherein an inclinometer pipe 7 and a matched inclinometer device are installed on a drill hole on each horizontal displacement observation pier 4, this horizontal displacement observes mound 4 and the horizontal displacement survey point device structure unanimous commonly used, horizontal displacement observes mound 4 includes concrete pier shaft 5 and establishes the compulsory centering base 6 at concrete pier shaft 5 top, total powerstation 1 or prism 2 can place on compulsory centering base 6, the deviational survey pipe 7 has been arranged on concrete pier shaft 5, the drilling position of deviational survey pipe 7 is located the 3 both ends horizontal displacement of valley width of cloth survey line and observes the central line of mound 4, and be on a parallel with the cross valley direction, deviational survey pipe 7 is furnished with the deviational survey device.
Wherein, as shown in fig. 4, the inclinometer includes probe 8, reading device 9 and cable 10 connecting probe 8 and reading device 9, be equipped with probe chamber 11 in the probe 8, be equipped with acceleration sensor 12 of acquireing along journey gradient data in the probe chamber 11, probe 8 periphery is equipped with 2 loose pulley assembly 13, combine fig. 5 and fig. 6 to show, be equipped with four vertical guide slots 14 on the inclinometer 7 inner wall, four guide slots 14 are the cross and distribute, and wherein two guide slots 14 are parallel to the cross river valley direction, another two guide slots 14 are parallel to the following river valley direction, loose pulley assembly moves in the guide slot.
In addition, the forced centering base 6 is provided with a protective cover 15 for protecting the forced centering base 6, the cable 10 is provided with scales, the position of the probe 8 in the inclinometer 7 can be measured, the end part of the probe 8 is provided with a buffer pad 16, and the bottom end opening of the inclinometer 7 is blocked by a sealing head 17.
In this embodiment, the total station 1 is a device of a known brand and high precision, such as come card, the prism 2 is a device of a known brand, and the lens can be freely lifted and lowered by the lifting rod.
In the implementation of the embodiment, the horizontal displacement observation piers 4 are poured at two end points of the selected valley amplitude measuring line 3, concrete pier bodies 5 are firstly dug and poured at the installation positions, the top of each concrete pier body 5 is provided with a forced centering chassis 6, the forced centering chassis 6 needs to be adjusted horizontally when being installed, the inclination is not more than 10%, the permanent concrete pier bodies 5 are required to be attractive in appearance, high-grade white waterproof paint is coated on the appearance, and striking measuring point numbers are marked.
The concrete pier bodies 5 on two sides of the central line (parallel to the direction of the cross valley) of the horizontal displacement observation piers 4 at two ends of the valley amplitude measuring line 3 are drilled downwards until the deep rock-soil body stabilization part, then the inclinometer tube 7 is embedded section by section, all tube sections of the inclinometer tube 7 are fastened together through a conduit connecting ring, two guide grooves 14 on the inner wall of the inclinometer tube 7 are parallel to the direction of the cross valley, the other two guide grooves 14 are parallel to the direction of the down valley, and whether the interior of the inclinometer tube 7 is smooth or not is checked in the process of embedding the inclinometer tube 7.
When this embodiment uses, acceleration sensor 12 is located the middle part of probe 8, and when probe 8 moved along the guide slot in deviational survey pipe 7, the on-way gradient data of deviational survey pipe 7 was obtained through acceleration sensor 12, combines the height that probe 8 promoted at every turn, calculates the horizontal displacement who reachs the different degree of depth departments of peripheral geotechnical body of deviational survey pipe 7 according to this. The acceleration sensor 12 can sense the inclination angle of the probe 8, directly acquire the inclination data of the probe 8, and the probe 8 is parallel to the axis of the inclinometer 7, so the acquired inclination data of the inclinometer 7 is also acquired. The horizontal displacement of different depths of the rock-soil body can reflect the deformation condition of the rock-soil body in the horizontal direction, and the horizontal displacement of the pipe orifice of the inclinometer 7 relative to the deep stable part of the rock-soil body can be obtained through the accumulation of the horizontal displacement at different depths along the way.
The monitoring method of the concrete arch dam valley amplitude absolute deformation monitoring device comprises the steps of measuring the distance between two end point horizontal displacement observation piers 4 of a valley amplitude measuring line 3 and measuring the horizontal displacement of the deep rock mass stabilizing part of the horizontal displacement observation piers 4, wherein the distance between the two end point horizontal displacement observation piers 4 of the valley amplitude measuring line 3 comprises the following steps:
a) measuring the distance between two end points of a valley amplitude measuring line 3 and a horizontal displacement observation pier 4 by using a total station 1 and a prism 2, installing the prism 2 on a left bank horizontal displacement observation pier 4 for the first time, installing the total station 1 on a right bank horizontal displacement observation pier 4, observing once from right to left and recording the time data, L1；
b) Using the total station 1 and the prism 2 to measure the distance between the horizontal displacement observation piers 4 at two end points of the valley amplitude measuring line 3, installing the prism 2 on the right bank horizontal displacement observation pier 4 for the second time, installing the total station 1 on the left bank horizontal displacement observation pier 4, observing once from left to right and recording the time data, L2；
c) Averaging the data obtained in step a) and step b), i.e.
Obtaining the distance between two end points of the valley amplitude measuring line 3;
the measurement of the horizontal displacement observation pier 4 relative to the deep rock mass stable part comprises the following steps:
d) at t1In the 1 st measurement of the time, the probe 8 is placed at the bottom of the inclinometer 7 on the concrete pier shaft 5, and then in the process of lifting the probe 8 from the bottom of the inclinometer 7 to the pipe opening, when the probe 8 moves upwards from the bottom of the inclinometer 7 along the guide groove 14 by a unit distance L (for example, L is 0.5m) of K (K is 1,2, …, K is the total number of times of moving the probe by unit length), the inclination data are recorded
e) The probe 8 is proposed, in a clockwise or counterclockwise directionRotating 90 degrees, placing into an inclinometer tube 7, and repeating the step d) to obtain t2Inclination data of probe 8 measured at 2 nd time
f) Lifting the probe 8, continuously rotating for 90 degrees along the same direction, then placing the probe into the inclinometer 7, and repeating the step d) to obtain t3Inclination data of probe 8 measured 3 rd time
g) Lifting the probe 8, continuously rotating for 90 degrees along the same direction, placing the probe into the inclinometer tube 7, and repeating the step d) to obtain t4Inclination data of probe 8 measured 4 th time
h) Averaging the inclination data obtained in the steps d) and f) to obtain inclination data in the direction, averaging the inclination data obtained in the steps e) and g) to obtain inclination data in the other direction, and calculating to obtain the on-way horizontal displacement of the inclinometer 7 by combining the height of each lifting of the probe 8, wherein the on-way horizontal displacement is specifically as follows:
based on the two sets of inclination data, when the probe 8 is lifted for the kth (K is 1,2, …, K), the horizontal displacement of the rock-soil mass at the position of the probe 8 is respectively
And
in the formula:
h is along the valley direction, the downstream direction is positive, the upstream direction is negative, v is across the valley direction, the direction to the center of the river is positive, the direction to the center of the river is negative, and L is the height (generally 0.5m) of each lifting of the probe 8;
i) repeating the steps d) to h), and calculating to obtain the on-way horizontal displacement of the inclinometer pipe 7 on the concrete pier body 5 on the other side;
and then, according to the distance between the two horizontal displacement observation piers 4 at the two ends of the valley amplitude measuring line 3 obtained in the step c) and the on-way horizontal displacement of the two inclinometer pipes 7, obtaining the absolute valley amplitude deformation through superposition.
In this embodiment, the unit distance of the probe lifted each time in steps d) to g) is 0.5 m.
Wherein the content of the first and second substances,
is T1The relative length between the two horizontal displacement observation piers 4 at the moment,
is T1The horizontal displacement of the inclinometer 7 on the pier 4 is observed at the moment,
is T1The horizontal displacement of the inclinometer 7 on the pier 4 is observed at the right bank at the moment,
is T1Absolute length of time, interval of time, waiting for the next time T2The next measurement is carried out, it is noted that the distance measurement between the two horizontal displacement observation piers 4 and the measurement of the inclinometer 7 need to be carried out synchronously, the measurement steps are consistent with the previous steps, and the absolute length obtained by the measurement is
If Δ L is negative, the valley width is expanded, and if Δ L is positive, the valley width is contracted.
The monitoring device and the monitoring method for the absolute deformation of the valley amplitude of the concrete arch dam can really and accurately measure the absolute deformation of the valley amplitude of the high arch dam, can effectively master the deformation rule of the valley amplitude of the high arch dam, and provide a powerful basis for solving the key scientific problem of valley amplitude contraction commonly faced by the 300 m-level high arch dam; the method provides detailed and accurate safety monitoring data for avoiding the problems that the valley amplitude shrinkage directly acts on the arch dam body to cause foundation damage or local cracking of the dam body, form a leakage channel, influence the normal operation of the arch dam, threaten the safety of the dam and the like.
Claims (8)
1. The utility model provides a concrete arch dam valley amplitude of grain absolute deformation monitoring devices which characterized in that: comprises two horizontal displacement observation piers (4) and a complete set measuring equipment total station (1) and a prism (2) thereof, wherein the two horizontal displacement observation piers (4) are arranged on the side slopes of two sides of a valley and are arranged at two ends of a valley amplitude measuring line (3), an inclinometer tube (7) and a complete set inclinometer device are installed on each horizontal displacement observation pier (4) in a drilling manner, each horizontal displacement observation pier (4) comprises a concrete pier body (5) and a forced centering base (6) arranged at the top of the concrete pier body (5), the total station (1) or the prism (2) can be placed on the forced centering base (6), the inclinometer tube (7) is arranged on the concrete pier body (5), the drilling position of the inclinometer tube (7) is positioned on the central line of the horizontal displacement observation piers (4) at two ends of the valley amplitude measuring line (3) and is parallel to the direction of a cross river, the inclinometer tube (7) is provided with the slope measuring device, a protective cover (15) for protecting the forced centering base (6) is arranged on the forced centering base (6), the inclination measuring device comprises a probe (8), a reading instrument (9) and a cable (10) for connecting the probe (8) and the reading instrument (9), wherein a probe cavity (11) is formed in the probe (8), and an acceleration sensor (12) for acquiring along-the-way inclination data is arranged in the probe cavity (11).
2. The concrete arch dam valley amplitude absolute deformation monitoring device of claim 1, wherein: and a plurality of pulley assemblies (13) are arranged on the periphery of the probe (8).
3. The concrete arch dam valley amplitude absolute deformation monitoring device of claim 2, wherein: be equipped with four vertical guide slot (14) on deviational survey pipe (7) inner wall, four guide slot (14) are the cross and distribute, and wherein two guide slot (14) are parallel to the river valley direction, and two other guide slot (14) are parallel to in the same direction as the river valley direction, loose pulley assembly (13) are in guide slot (14) internal motion.
4. The concrete arch dam valley amplitude absolute deformation monitoring device of claim 1, wherein: scales are arranged on the cable (10).
5. The concrete arch dam valley amplitude absolute deformation monitoring device of claim 1, wherein: the end part of the probe (8) is provided with a cushion pad (16).
6. The concrete arch dam valley amplitude absolute deformation monitoring device of claim 1, wherein: and the bottom end opening of the inclinometer pipe (7) is blocked by a sealing head (17).
7. A monitoring method of a concrete arch dam valley amplitude absolute deformation monitoring device according to any one of claims 1 to 3, characterized in that: the method comprises the following steps of measuring the distance between two end point horizontal displacement observation piers (4) of a valley amplitude measuring line (3) and measuring the horizontal displacement of the relatively deep rock mass stable part of the horizontal displacement observation pier (4), wherein the distance between the two end point horizontal displacement observation piers (4) of the valley amplitude measuring line (3) comprises the following steps:
a) measuring the distance between two end point horizontal displacement observation piers (4) of a valley amplitude measuring line (3) by using a total station (1) and a prism (2), installing the prism (2) on a left bank horizontal displacement observation pier (4) for the first time, installing the total station (1) on a right bank horizontal displacement observation pier (4), observing once from right to left and recording the data;
b) measuring the distance between two end point horizontal displacement observation piers (4) of a valley amplitude measuring line (3) by using a total station (1) and a prism (2), mounting the prism (2) on a right bank horizontal displacement observation pier (4) for the second time, mounting the total station (1) on a left bank horizontal displacement observation pier (4), observing once from left to right and recording the data;
c) averaging the data obtained in the step a) and the step b) to obtain the distance between two end points of the valley amplitude measuring line (3);
the measurement of the horizontal displacement observation pier (4) relative to the deep rock mass stable part comprises the following steps:
d) placing the probe (8) at the bottom of the inclinometer pipe (7) on the concrete pier body (5) at one side, and then recording inclination data of the probe (8) in the process of lifting the probe (8) from the bottom of the inclinometer pipe (7) to a pipe orifice;
e) the probe (8) is put forward, the probe is placed into the inclinometer tube (7) after being rotated by 90 degrees along the clockwise direction or the anticlockwise direction, and the step d) is repeated to obtain inclination data of the probe (8) measured at the 2 nd time;
f) the probe (8) is proposed, the probe is continuously rotated for 90 degrees along the same direction and then is placed into the inclinometer (7), and the step d) is repeated to obtain inclination data of the probe (8) measured for the 3 rd time;
g) the probe (8) is proposed, the probe is continuously rotated for 90 degrees along the same direction and then is placed into the inclinometer (7), and the step d) is repeated to obtain inclination data of the probe (8) measured for the 4 th time;
h) averaging the inclination data obtained in the step d) and the step f) to obtain inclination data in the direction, averaging the inclination data obtained in the step e) and the step g) to obtain inclination data in the other direction, and calculating to obtain the on-way horizontal displacement of the inclinometer (7) by combining the height of each lifting of the probe (8);
i) repeating the steps d) to h), and calculating to obtain the on-way horizontal displacement of the inclinometer pipe (7) on the concrete pier body (5) on the other side;
and then, obtaining the absolute deformation of the valley amplitude by superposition according to the distance between the horizontal displacement observation piers (4) at the two ends of the valley amplitude measuring line (3) obtained in the step c) and the on-way horizontal displacement of the two inclinometer pipes (7).
8. A method for monitoring absolute deformation of a valley amplitude of a concrete arch dam according to claim 7, wherein: in the steps d) to g), the unit distance of each lifting of the probe (8) is 0.5 m.
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| CN109115149B (en) * | 2018-08-13 | 2019-08-27 | 山东大学 | A kind of soil mass of foundation pit side slope deeply mixing cement-soil pile monitoring method based on measurement of coordinates |
| CN109138003B (en) * | 2018-08-13 | 2019-10-29 | 山东大学 | A kind of soil body deeply mixing cement-soil pile monitoring method based on opposite side ranging |
| CN108955741B (en) * | 2018-08-17 | 2023-11-03 | 长江勘测规划设计研究有限责任公司 | Device and method suitable for safety monitoring of waste slag field |
| CN110207653A (en) * | 2019-06-12 | 2019-09-06 | 长江勘测规划设计研究有限责任公司 | Soil body delaminating deposition and horizontal displacement duplex measurement device, system and method |
| CN111089542A (en) * | 2019-12-16 | 2020-05-01 | 西华大学 | Landslide surface and deep displacement combined monitoring system and method |
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2020
- 2020-10-30 CN CN202011190635.4A patent/CN112344900B/en active Active
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