CN113251987A - Early-stage dumping deformation monitoring system and method for construction of concrete high arch dam - Google Patents
Early-stage dumping deformation monitoring system and method for construction of concrete high arch dam Download PDFInfo
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- CN113251987A CN113251987A CN202110465775.6A CN202110465775A CN113251987A CN 113251987 A CN113251987 A CN 113251987A CN 202110465775 A CN202110465775 A CN 202110465775A CN 113251987 A CN113251987 A CN 113251987A
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- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
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Abstract
The invention provides a system and a method for monitoring early dumping deformation of a concrete high arch dam in construction, wherein a deflection monitoring vertical line is selected on the central surface of a monitored dam section, high-precision inclinometers are arranged at a vertical interval of 15-25 m, and the concrete positions of the inclinometers can utilize a longitudinal gallery in the dam, a concrete cabin surface, a transverse inspection gallery or an elevator shaft and a staircase in the dam. A plurality of low-power consumption intelligent data acquisition instruments, optical transmitters and receivers and routers are arranged in the corridor. The inclinometer is connected into the low-power-consumption intelligent data acquisition instrument to perform wireless or wired acquisition on the warehouse surface or the corridor, automatic monitoring is performed after installation, and the inclinometer and a central control room cloud server form an Internet of things for data acquisition and transmission; and the control terminal carries out smoothing treatment on the dip angle measured values according to a time sequence or spatial distribution and calculates the deflection deformation of the dam body in each period after construction. The invention can comprehensively and accurately master the early dumping deformation of the dam body in real time and provides reliable reference data for a construction site.
Description
Technical Field
The invention relates to a system and a method for monitoring early-stage pouring deformation of concrete high arch dam construction, in particular to a system and a method for monitoring early-stage pouring deformation of concrete high arch dam construction based on high-precision inclination measurement and an internet of things technology.
Background
Generally, a concrete high arch dam (with the height H being more than or equal to 100m) adopts a hyperbolic design, and the horizontal direction and the vertical direction of the dam are both curved, namely the lower part of the dam section of the concrete arch dam inclines upstream (overhung) and the upper part inclines downstream (overhung). In order to solve the temperature stress control problem of large-volume concrete, a concrete arch dam is usually poured by dam sections, the width of each dam section is about 20m, and then transverse seams among the dam sections are sealed and grouted to form a whole in the later construction period. In addition, for the purposes of grouting construction, drainage, traffic, inspection, monitoring and the like, longitudinal galleries (left and right bank directions) are arranged in the dam at intervals of 50m in the elevation direction, and some longitudinal galleries are also combined with transverse galleries (upstream and downstream directions), as shown in fig. 1.
Because the dam is not formed into a whole in the early construction stage of the concrete high arch dam, and the dam body can have obvious dumping deformation under the influence of construction factors such as self weight, grouting and the like, the early dumping deformation in the construction of the high arch dam can be comprehensively, timely and accurately mastered, and the method is very important for guiding the construction of the dam, preventing cracks of the dam body, ensuring the safety of the dam and evaluating the safety of the dam in the later stage.
However, it is often difficult to detect the toppling deformation in the early stage of the arch dam construction for the following reasons:
1) limited by the concrete pouring construction progress of the dam, the observation room in the dam gallery is formed later, and a high arch dam vertical line system installed in the observation room cannot be installed in place as early as possible, so that the possible dumping deformation of the high arch dam cannot be measured through the high arch dam vertical line system;
2) because the vertical line system of the high arch dam cannot work as early as possible, constructors install total station photometric systems at positions near the front and the back of the construction surface of the high arch dam to monitor possible toppling deformation of the high arch dam, but in the construction period of the concrete high arch dam, the total station is interfered by construction, and the displacement precision obtained by the total station optical measurement means cannot meet the standard requirement;
3) the conventional sliding inclinometer or fixed inclinometer is used for monitoring the possible dumping deformation of the high arch dam, and the displacement precision of the high arch dam cannot meet the specification requirement.
Patent No. CN201410070397.1 discloses a method for monitoring total deformation of an arch dam, and the method has inaccurate measurement result because the arrangement distance of inclinometers is too large, and factors such as the error of the instruments and the temperature deformation interference during construction are not considered.
Therefore, at present, a perfect dam body dumping deformation monitoring system is not available in a concrete high arch dam construction site, and at present, the early-stage dumping deformation of the arch dam construction is difficult to realize real-time and accurate monitoring.
Disclosure of Invention
In view of the above, the present invention provides a system for accurately monitoring early dumping deformation of concrete high arch dam construction in real time based on high-precision inclination measurement and internet of things technology.
The invention further aims to provide a method for accurately monitoring early dumping deformation of concrete high arch dam construction in real time based on high-precision inclination measurement and the technology of internet of things.
In order to achieve the purpose, the invention adopts the following technical scheme: a monitoring system for early dumping deformation of concrete high arch dam construction comprises a plurality of high-precision inclinometers, a plurality of low-power consumption intelligent data acquisition instruments, an optical transceiver, a router and a gateway;
along with the pouring of the concrete high arch dam, arranging the high-precision inclinometer and the low-power consumption intelligent data acquisition instrument; the signal output end of the high-precision inclinometer is connected with the signal input end of the low-power consumption intelligent data acquisition instrument; the high-precision inclinometer and the low-power consumption intelligent data acquisition instrument are automatically monitored after being installed;
the low-power-consumption intelligent data acquisition instrument forms an internet of things through the optical transceiver, the router, the cloud server and the dam control end server, and monitors the dumping deformation of the dam;
and after receiving the measurement values of the high-precision inclination meters, the dam control end server performs smoothing treatment on the data sequence of the measurement values of the inclination angles to obtain an early-stage dumping deformation curve of the concrete high arch dam construction.
Preferably, aiming at the dam section to be monitored, selecting a deflection monitoring vertical line on the center face of the dam section; arranging one high-precision inclinometer at the intersection of each longitudinal gallery and the deflection monitoring perpendicular;
arranging one high-precision inclinometer at intervals of 15-25 m between every two adjacent longitudinal galleries along the deflection monitoring vertical line; when the deflection monitoring vertical line cannot penetrate through the top of the dam, the high-precision inclinometer is arranged at the folding point of the deflection monitoring vertical line.
Preferably, one said high accuracy inclinometer is disposed within the dam at each of the upstream and downstream ends of the transverse galleries.
Preferably, the low-power consumption intelligent data acquisition instrument, the optical transceiver and the router are arranged in each longitudinal gallery in the dam body; the low-power consumption intelligent data acquisition instruments in the longitudinal galleries and among the longitudinal galleries are connected with each other through optical fibers or 485 signal lines.
Preferably, before a signal cable of the high-precision inclinometer is connected into the longitudinal gallery or the transverse gallery, the high-precision inclinometer and the low-power consumption intelligent data acquisition instrument perform wireless data acquisition on the concrete pouring warehouse surface; after a signal cable of the high-precision inclinometer is connected into the longitudinal gallery or the transverse gallery for monitoring, the high-precision inclinometer and the low-power consumption intelligent data acquisition instrument acquire wireless or wired data in the gallery.
Preferably, the dam section is the best one with a high arch dam vertical line system; and the deflection monitoring vertical line is superposed with a normal vertical line and a reverse vertical line of a vertical line system of the high arch dam.
Preferably, after receiving the measurement data, the dam control end server performs three-point sliding average processing on the data sequence of the inclination angle measurement value of each inclinometer; for the inclinometer arranged on the deflection monitoring vertical line, smoothing the measured value of the inclinometer to obtain the inclination angle change value of the deflection monitoring vertical line at the elevation position of the inclinometer; calculating the inclination angle change value of the deflection monitoring vertical line at the elevation position of the two inclinometers at the upstream and downstream ends in the transverse gallery by using the inclination angle change value of the two inclinometers and the distance between the deflection monitoring vertical line; four-point smoothing or three-point weighting smoothing is carried out on the inclination angle change values of all elevation positions on the deflection monitoring vertical line from bottom to top; and (4) taking the building base surface as a relative immobile point, and gradually accumulating and calculating the toppling deformation from bottom to top.
The invention discloses a method for monitoring early dumping deformation of a concrete high arch dam in construction, which comprises the following steps of:
s1, selecting a deflection monitoring vertical line on the center face of the dam section;
s2, arranging a high-precision inclinometer at the intersection of each longitudinal gallery and the deflection monitoring vertical line by using the longitudinal galleries built in the dam section; arranging a high-precision inclinometer at intervals of 15-25 m between every two adjacent longitudinal galleries along a deflection monitoring vertical line; when the deflection monitoring vertical line cannot penetrate through the top of the dam, adopting broken line arrangement, and arranging a high-precision inclinometer at a break point;
if a transverse gallery is built in the dam body, respectively arranging a high-precision inclinometer at the upstream end and the downstream end of the transverse gallery;
s3, arranging a low-power consumption intelligent data acquisition instrument, an optical transceiver and a router in each longitudinal corridor;
connecting the signal output end of each high-precision inclinometer with the signal input end of the low-power consumption intelligent data acquisition instrument through a signal cable;
the low-power consumption intelligent data acquisition instruments in the longitudinal galleries and among the longitudinal galleries are connected with each other through optical fibers or 485 signal lines; the low-power-consumption intelligent data acquisition instrument forms an Internet of things through an optical transceiver, a router, a cloud server and a dam control end server, and data transmission is carried out in a wireless transmission mode;
s4, arranging the high-precision inclinometer and the low-power consumption intelligent data acquisition instrument along with the pouring of the concrete bin surface, and starting automatic monitoring after the arrangement is finished;
before a signal cable of the high-precision inclinometer is connected into the longitudinal gallery, the high-precision inclinometer and the low-power consumption intelligent data acquisition instrument acquire wireless data on the concrete pouring bin surface; after a signal cable of the high-precision inclinometer is connected into the longitudinal corridor for monitoring, the high-precision inclinometer and the low-power consumption intelligent data acquisition instrument acquire wireless or wired data in the corridor;
s5, after receiving the measurement data, the dam control end server performs three-point sliding average processing on the inclination angle measurement value data sequence of each inclinometer; for the inclinometer arranged on the deflection monitoring vertical line, smoothing the measured value of the inclinometer to obtain the inclination angle change value of the deflection monitoring vertical line at the elevation position of the inclinometer; calculating the inclination angle change value of the deflection monitoring vertical line at the elevation position of the two inclinometers at the upstream and downstream ends in the transverse gallery by using the inclination angle change value of the two inclinometers and the distance between the deflection monitoring vertical line; four-point smoothing or three-point weighting smoothing is carried out on the inclination angle change values of all elevation positions on the deflection monitoring vertical line from bottom to top; and (4) taking the building base surface as a relative immobile point, and gradually accumulating and calculating the toppling deformation from bottom to top.
Preferably, the dam section is the best one with a high arch dam vertical line system; and the deflection monitoring vertical line is superposed with a normal vertical line and a reverse vertical line of the vertical line system of the high arch dam.
Preferably, the high-precision inclinometer can be further arranged in a vertical elevator room, a staircase room and each elevator hoistway inside the dam body to carry out multipoint monitoring on the dumping deformation of the dam body.
Drawings
FIG. 1 is a three-dimensional perspective view of a concrete high arch dam;
FIG. 2 is a schematic cross-sectional view of FIG. 1 along the direction of river flow;
fig. 3 is a schematic view of a lateral gallery structure.
Detailed Description
The structure and features of the present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that various modifications can be made to the embodiments disclosed herein, and therefore, the embodiments disclosed in the specification should not be construed as limiting the present invention, but merely as exemplifications of embodiments thereof, which are intended to make the features of the present invention obvious.
In order to accurately monitor the possible dumping deformation of the high arch dam in real time along with the construction process of the concrete high arch dam, the invention provides a monitoring system for the early dumping deformation of the concrete high arch dam in construction, which comprises a plurality of high-precision inclinometers, a plurality of low-power consumption intelligent data acquisition instruments, an optical transceiver, a router and a gateway.
As shown in fig. 1-3, the invention selects a deflection monitoring vertical line 1 on the center face of the dam section for the dam section to be monitored; arranging a high-precision inclinometer 3 at the intersection of each longitudinal gallery and a deflection monitoring perpendicular line by using longitudinal galleries 2 (left and right bank directions, vertical river direction) built in the dam section; and arranging a high-precision inclinometer 3 between the adjacent longitudinal galleries along the deflection monitoring vertical line at intervals of 15-25 m. If the deflection monitoring vertical line cannot penetrate through the dam crest due to overlarge bending of the dam section beam, the broken line arrangement is adopted, and a high-precision inclinometer 3 is arranged at a broken point T.
If a transverse gallery 4 is built into the dam (down-the-river), a high-precision inclinometer 3 is arranged at each of the upstream and downstream ends 5, 6 of the transverse gallery.
And a low-power consumption intelligent data acquisition instrument, an optical transceiver and a router are arranged in each longitudinal gallery and each transverse gallery. The signal output end of each high-precision inclinometer is connected with the signal input end of the low-power consumption intelligent data acquisition instrument through a signal cable; the low-power consumption intelligent data acquisition instruments in the longitudinal galleries and among the longitudinal galleries are connected with each other through optical fibers or 485 signal lines; the low-power-consumption intelligent data acquisition instrument forms an internet of things with a dam control end server through an optical transmitter-receiver, a router, the cloud server, and transmits data in a wireless transmission mode, real-time monitoring is carried out on the dumping deformation of a dam body, and the inclination angle of each dam section in each age period is calculated.
The high-precision inclinometer 3 and the low-power consumption intelligent data acquisition instrument are arranged along with the pouring of the concrete bin surface, and the signal output end of the high-precision inclinometer 3 is connected with the low-power consumption intelligent data acquisition instrument through a signal cable. Before a signal cable of the high-precision inclinometer is connected into the longitudinal gallery 2 or the transverse gallery 4, the high-precision inclinometer 3 and the low-power consumption intelligent data acquisition instrument perform wireless data acquisition on the concrete pouring warehouse surface; after a signal cable of the high-precision inclinometer 3 is connected into the longitudinal gallery or the transverse gallery for monitoring, the high-precision inclinometer and the low-power consumption intelligent data acquisition instrument acquire wireless or wired data in the gallery.
According to the invention, the internet of things technology based on a low-power-consumption wide area network is adopted, a high-precision inclinometer, a low-power-consumption intelligent data acquisition instrument, an optical transmitter and receiver, a router and a gateway are arranged along with the pouring of a high arch dam, and after equipment is installed, the monitoring system performs an automatic monitoring function, accurately and completely obtains the early-stage pouring deformation of the whole dam construction in real time, and monitors the pouring deformation condition of the dam.
In order to further verify the monitoring precision in the monitoring process, when the deflection monitoring vertical line is selected, the dam section with the high arch dam vertical line system is preferably selected, and the deflection monitoring vertical line is superposed with the normal and reverse vertical lines of the high arch dam vertical line system.
In order to ensure that the measurement precision of the invention meets the standard requirement and the measurement result is accurate, the resolution of the high-precision inclinometer selected by the invention is 1 percent, and the precision is better than 2 percent. In the preferred embodiment of the invention, the BGK-6705-2 high-precision inclinometer manufactured by Kyoto instruments, Inc. (Beijing) is selected. Of course, a C801 Tuff Tilt 420 high precision inclinometer manufactured by Jewel Instruments may be used as long as the resolution is 1 "and the precision is better than 2".
In consideration of the construction site environment of the concrete high arch dam, a power supply cable cannot be laid for each data acquisition instrument when the high arch dam is poured, and meanwhile, in order to avoid the phenomena of data interruption, data loss and the like of a monitoring system, the wireless intelligent data acquisition instrument with low power consumption and a built-in high-capacity battery is selected for data acquisition and transmission. In the preferred embodiment of the invention, the BGK-GL2-MM low-power consumption intelligent data acquisition instrument manufactured by Beijing GmbH instruments is selected. The low-power consumption intelligent data acquisition instrument can be connected to a high-precision inclinometer, the input of the low-power consumption intelligent data acquisition instrument is standard analog quantity, the precision is voltage +/-2.5 mV, the resolution is voltage +/-1 mV, the power supply mode is a disposable lithium battery with the voltage of 3.6V/9Ah (19Ah), the power consumption is 13mA receiving, 100mA sending, the average power consumption is 300 muA, the self-reporting is carried out for 1 time/h, the low-power consumption intelligent data acquisition instrument can work for 3-5 years, 1000 groups (times) of data storage are carried out, the communication mode is Bluetooth 4.0, and the protection level is IP 67. Even if the wireless communication is interrupted for a short time, the monitoring data can not be lost, and the monitoring data can be hung or placed at an instrument cable leading-out point nearby during installation. Because it has the characteristics of small volume and light weight, the movement is very convenient during construction, and the device is very suitable for the data acquisition of a warehouse surface monitoring instrument during construction. After the high-precision inclination meter is connected, automatic monitoring can be carried out, and early-stage dumping deformation of dam construction can be accurately monitored in real time.
In the preferred embodiment of the present invention, the high-precision inclinometer collects and transmits the monitoring data through the low-power consumption intelligent data collector, or, of course, through a distributed network measurement unit (such as model BGK-Micro-40 generated by Kyowa instruments (Beijing) Inc.).
In order to further monitor the dumping deformation of the concrete high arch dam, the invention can also arrange high-precision inclinometers in the vertical elevator room, the staircase room and each elevator shaft in the dam body to carry out multi-point monitoring on the dumping deformation of the dam body.
The high-precision inclinometers installed in the longitudinal gallery and the transverse gallery transmit the measurement data to a central control room control terminal through a low-power consumption intelligent data acquisition instrument, a router, an optical transceiver, a gateway and a cloud server, and the control terminal takes the building base as a relatively immobile point and gradually accumulates and calculates the dumping deformation from bottom to top after receiving the measurement data.
Each high-precision inclinometer can measure the included angle of an X axis (a double-shaft high-precision inclinometer and a Y axis) of an embedded position of the instrument relative to the direction of a gravity plumb, and the change of the included angle relative to the embedding is an inclination angle change value. In order to reduce the influence of the random error of the dip angle measurement value on the deflection deformation calculation value, the invention carries out three-point sliding average processing on the dip angle measurement value data sequence of each high-precision inclinometer to obtain a smooth value theta of the dip angle measurement value data sequence.
For the high-precision inclinometers arranged on the deflection monitoring vertical line, in the longitudinal gallery and between the longitudinal galleries, the measured values are smoothed to obtain the inclination angle change value theta of the deflection monitoring vertical line at the elevation positioni。
For the two inclinometers at the upstream and downstream ends in the transverse gallery 4, as shown in FIG. 3, the inclination angle change value theta of the deflection monitoring vertical line at the elevation position is calculated by using the distance between the inclination angle change value after smoothing and the deflection monitoring vertical line 1j：
In order to reduce the influence of local temperature deformation of water cooling on the measured value of the dumping deformation of the dam in the construction process, four-point smoothing processing is carried out on the inclination angle change value of each elevation position on the deflection monitoring vertical line from bottom to top:
or weighted smoothing (Z)iHeight difference on vertical line for deflection monitoring):
deflection deformation increment delta of each height difference on deflection monitoring vertical lineiAnd (3) processing:
δi＝Zi×tanθi
thus, the deflection D at each elevation position on the deflection monitoring vertical line of the high arch dam is obtained by accumulation from bottom to topnNamely, the tilting deformation curve 7 of the high arch dam:
in the initial stage of pouring the dam body, the high-precision inclinometer and the low-power consumption intelligent data acquisition instrument are arranged along with the pouring of the concrete high arch dam, and the high-precision inclinometer and the low-power consumption intelligent data acquisition instrument are automatically monitored after being installed, so that the dam body pouring condition can be accurately and comprehensively mastered in real time, and the problems that the observation time in the dam corridor of the dam construction site is late, the manual observation cannot be carried out in the corridor closed period, the measured data is interrupted and lost and the like at present are solved.
Because the invention adopts the high-precision inclinometer for measurement, the measurement error of the invention in the elevation range of 150m is less than 1.5mm, and the measurement is accurate. In addition, because the invention selects the low-power-consumption intelligent wireless data acquisition instrument for networking, the high-capacity battery is arranged in the low-power-consumption intelligent wireless data acquisition instrument, and the low-power-consumption intelligent wireless data acquisition instrument has low power consumption, the power supply does not need to be configured in the inspection corridor, and the construction is simple and convenient. And because the low-power consumption intelligent data acquisition instrument and the gateway selected by the invention support the 3G/4G/FE network protocol, the invention has simple networking and flexible configuration.
Finally, it should be noted that: the above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a high arch dam of concrete construction early topples over deformation monitoring system which characterized in that: the system comprises a plurality of high-precision inclinometers, a plurality of low-power consumption intelligent data acquisition instruments, an optical transceiver, a router and a gateway;
along with the pouring of the concrete high arch dam, arranging the high-precision inclinometer and the low-power consumption intelligent data acquisition instrument; the signal output end of the high-precision inclinometer is connected with the signal input end of the low-power consumption intelligent data acquisition instrument; the high-precision inclinometer and the low-power consumption intelligent data acquisition instrument are automatically monitored after being installed;
the low-power-consumption intelligent data acquisition instrument forms an internet of things through the optical transceiver, the router, the cloud server and the dam control end server, and monitors the dumping deformation of the dam;
and after receiving the measurement values of the high-precision inclination meters, the dam control end server performs smoothing treatment on the data sequence of the measurement values of the inclination angles to obtain an early-stage dumping deformation curve of the concrete high arch dam construction.
2. The system for monitoring early dumping deformation in construction of a concrete high arch dam according to claim 1, wherein: selecting a deflection monitoring vertical line on the center face of the dam section aiming at the dam section to be monitored; arranging one high-precision inclinometer at the intersection of each longitudinal gallery and the deflection monitoring perpendicular;
arranging one high-precision inclinometer at intervals of 15-25 m between every two adjacent longitudinal galleries along the deflection monitoring vertical line; when the deflection monitoring vertical line cannot penetrate through the top of the dam, the high-precision inclinometer is arranged at the folding point of the deflection monitoring vertical line.
3. The system for monitoring early dumping deformation in construction of a concrete high arch dam according to claim 2, wherein: and arranging one high-precision inclinometer at each of the upstream end and the downstream end of the transverse gallery in the dam body.
4. The system for monitoring early dumping deformation in construction of a concrete high arch dam according to claim 3, wherein: the low-power consumption intelligent data acquisition instrument, the optical transmitter and receiver and the router are arranged in each longitudinal gallery in the dam body;
the low-power consumption intelligent data acquisition instruments in the longitudinal galleries and among the longitudinal galleries are connected with each other through optical fibers or 485 signal lines.
5. The early dumping deformation monitoring system for the construction of the concrete high arch dam according to claim 4, wherein:
before a signal cable of the high-precision inclinometer is connected into the longitudinal gallery or the transverse gallery, the high-precision inclinometer and the low-power consumption intelligent data acquisition instrument acquire wireless data on the concrete pouring warehouse surface; after a signal cable of the high-precision inclinometer is connected into the longitudinal gallery or the transverse gallery for monitoring, the high-precision inclinometer and the low-power consumption intelligent data acquisition instrument acquire wireless or wired data in the gallery.
6. The early dumping deformation monitoring system for concrete high arch dam construction according to one of claims 1 to 5, wherein: the dam section is the best one with a high arch dam vertical line system; and the deflection monitoring vertical line is superposed with a normal vertical line and a reverse vertical line of a vertical line system of the high arch dam.
7. The system for monitoring early dumping deformation in construction of a concrete high arch dam according to claim 6, wherein: after receiving the measurement data, the dam control end server performs three-point sliding average processing on the data sequence of the inclination angle measured values of the inclinometers; for the inclinometer arranged on the deflection monitoring vertical line, smoothing the measured value of the inclinometer to obtain the inclination angle change value of the deflection monitoring vertical line at the elevation position of the inclinometer; calculating the inclination angle change value of the deflection monitoring vertical line at the elevation position of the two inclinometers at the upstream and downstream ends in the transverse gallery by using the inclination angle change value of the two inclinometers and the distance between the deflection monitoring vertical line; four-point smoothing or three-point weighting smoothing is carried out on the inclination angle change values of all elevation positions on the deflection monitoring vertical line from bottom to top; and (4) taking the building base surface as a relative immobile point, and gradually accumulating and calculating the toppling deformation from bottom to top.
8. A method for monitoring early dumping deformation of concrete high arch dam construction is characterized by comprising the following steps: it comprises the following steps:
s1, selecting a deflection monitoring vertical line on the center face of the dam section;
s2, arranging a high-precision inclinometer at the intersection of each longitudinal gallery and the deflection monitoring vertical line by using the longitudinal galleries built in the dam section; arranging a high-precision inclinometer at intervals of 15-25 m between every two adjacent longitudinal galleries along a deflection monitoring vertical line; when the deflection monitoring vertical line cannot penetrate through the top of the dam, adopting broken line arrangement, and arranging a high-precision inclinometer at a break point;
if a transverse gallery is built in the dam body, respectively arranging a high-precision inclinometer at the upstream end and the downstream end of the transverse gallery;
s3, arranging a low-power consumption intelligent data acquisition instrument, an optical transceiver and a router in each longitudinal corridor;
connecting the signal output end of each high-precision inclinometer with the signal input end of the low-power consumption intelligent data acquisition instrument through a signal cable;
the low-power consumption intelligent data acquisition instruments in the longitudinal galleries and among the longitudinal galleries are connected with each other through optical fibers or 485 signal lines; the low-power-consumption intelligent data acquisition instrument forms an Internet of things through an optical transceiver, a router, a cloud server and a dam control end server, and data transmission is carried out in a wireless transmission mode;
s4, arranging the high-precision inclinometer and the low-power consumption intelligent data acquisition instrument along with the pouring of the concrete bin surface, and starting automatic monitoring after the arrangement is finished;
before a signal cable of the high-precision inclinometer is connected into the longitudinal gallery, the high-precision inclinometer and the low-power consumption intelligent data acquisition instrument acquire wireless data on the concrete pouring bin surface; after a signal cable of the high-precision inclinometer is connected into the longitudinal corridor for monitoring, the high-precision inclinometer and the low-power consumption intelligent data acquisition instrument acquire wireless or wired data in the corridor;
s5, after receiving the measurement data, the dam control end server performs three-point sliding average processing on the inclination angle measurement value data sequence of each inclinometer; for the inclinometer arranged on the deflection monitoring vertical line, smoothing the measured value of the inclinometer to obtain the inclination angle change value of the deflection monitoring vertical line at the elevation position of the inclinometer; calculating the inclination angle change value of the deflection monitoring vertical line at the elevation position of the two inclinometers at the upstream and downstream ends in the transverse gallery by using the inclination angle change value of the two inclinometers and the distance between the deflection monitoring vertical line; four-point smoothing or three-point weighting smoothing is carried out on the inclination angle change values of all elevation positions on the deflection monitoring vertical line from bottom to top; and (4) taking the building base surface as a relative immobile point, and gradually accumulating and calculating the toppling deformation from bottom to top.
9. The method for monitoring early dumping deformation in construction of the concrete high arch dam according to claim 8, wherein: the dam section is the best one with a high arch dam vertical line system;
and the deflection monitoring vertical line is superposed with a normal vertical line and a reverse vertical line of the vertical line system of the high arch dam.
10. The method for monitoring early dumping deformation in construction of the concrete high arch dam according to claim 9, wherein: the high-precision inclinometer can also be arranged in a vertical elevator room, a staircase room and each elevator hoistway in the dam body to carry out multipoint monitoring on the dumping deformation of the dam body.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114383560A (en) * | 2022-01-04 | 2022-04-22 | 中国建筑第八工程局有限公司 | Precast concrete component perpendicularity detection method based on inclinometer |
| CN114485542A (en) * | 2022-02-23 | 2022-05-13 | 江西省水利科学院 | Method for monitoring deformation of diaphragm wall reinforced earth dam |
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