CN115022587A - Lifting type foundation scouring monitoring device and method - Google Patents

Lifting type foundation scouring monitoring device and method Download PDF

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Publication number
CN115022587A
CN115022587A CN202210597562.3A CN202210597562A CN115022587A CN 115022587 A CN115022587 A CN 115022587A CN 202210597562 A CN202210597562 A CN 202210597562A CN 115022587 A CN115022587 A CN 115022587A
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water wheel
water
scouring
monitoring
wheel shaft
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董陈建
胡余勇
戴朝晖
季必锋
陈霞丹
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Wenzhou Municipal Administration Center
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Wenzhou Municipal Administration Center
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/97—Determining parameters from multiple pictures
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/727—Offshore wind turbines

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Abstract

The invention discloses a lifting type foundation scouring monitoring device, which comprises: install the lift lead screw at the pier lateral wall, threaded connection has the sliding seat on the lift lead screw, installs the sealed cowling on the sliding seat, installs monitoring subassembly and lighting components in the sealed cowling, and the transmission case is installed to the pier lateral wall, and the transmission bottom is connected with water wheels through the rotation of water wheel axle, and the transmission case is used for arousing rivers the rotation of water wheels to turn into the elevating movement of sealed cowling. A lifting type foundation scouring monitoring method comprises the following steps: monitoring and recording an original image; the sensor senses the number of turns of the water wheel and transmits the number of turns to the storage; sending out an alarm signal when the number of rotation turns exceeds a preset alarm value; and comparing the original image with the image after scouring, and analyzing the basic scouring amount by combining the rotation turns. When water flows excessively, the sealing cover is driven to rise through the water flow so as to be protected; the influence of the water flow velocity on the basic scouring amount is analyzed by recording the number of rotation turns of the water wheel shaft, and the monitoring accuracy is improved.

Description

Lifting type foundation scouring monitoring device and method
Technical Field
The invention belongs to the technical field of foundation monitoring, and particularly relates to a lifting type foundation scouring monitoring device and method.
Background
Due to the action of water flow, silt around the bridge pile foundation can be washed by the water flow to form a washing pit, particularly in some downstream rivers, the local foundation of the bridge is often washed due to the fact that the direction of the water flow of the rivers is consistent, so that the settlement occurs around the pile foundation, and the safety of the bridge structure is affected.
Chinese patent CN 108755786B discloses an erosion monitoring device of offshore wind power pile foundation, including seal shell, monitoring module and control module, seal shell is fixed in on the other seabed of wind power pile foundation, monitoring module monitors the seabed scouring condition of wind power pile foundation in seal shell, control module and monitoring module are connected for control monitoring module's monitoring angle, monitoring height or monitoring effect. Although the patent can realize monitoring of the depth of penetration in both reciprocating flow and non-directional flow, the real situation of the seabed surface can be conveniently known by taking a picture on the spot through the erosion monitoring device; can realize 360-degree all-weather measurement and avoid the harm caused by the scouring pit. However, in the scouring process, especially in the strong scouring process, the water flow brings silt to be stained on the surface of the sealing shell to influence the visual field of the monitoring module, and the silt is easy to damage the sealing shell when the silt is flapped on the sealing shell, so that the monitoring effect is influenced; and the monitoring accuracy of the basic scouring amount is reduced by simply shooting through the monitoring module and being easily influenced by the environment and the angle.
Disclosure of Invention
In view of the above, the invention aims to provide a lifting type foundation scouring monitoring device and method, which are used for solving the problem that in the prior art, silt brought up by water flow is beaten on a sealed shell of a monitoring module in a strong scouring process to influence a monitoring visual field, and even easily cause damage to the sealed shell, so that a monitoring effect is influenced; and the monitoring accuracy of the basic scouring amount is reduced by simply shooting through the monitoring module and being easily influenced by the environment and the angle.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a lifting type foundation scouring monitoring device, which comprises: the lifting screw rod is installed on the side wall of a pier, a sliding seat is in threaded connection with the lifting screw rod, a sealing cover is installed on the sliding seat, a monitoring assembly and an illuminating assembly are installed in the sealing cover, a transmission box is installed on the side wall of the pier and located below the sliding seat, the bottom end of the transmission box is connected with a water wheel through a water wheel shaft in a rotating mode, a centrifugal cavity and cavities symmetrically arranged on two sides of the centrifugal cavity are formed in the transmission box, the lifting screw rod extends to the cavities and is connected in a rotating mode, a wheel column is fixedly connected to the lifting screw rod and located in the cavities, a curved groove is formed in the side wall of the wheel column, the water wheel shaft extends to the centrifugal cavity and is connected in a rotating mode, first hinge rods are symmetrically hinged to two sides of the water wheel shaft, centrifugal balls are fixedly connected to the ends, far away from the water wheel shaft, of the first hinge rods are hinged to the middle of the first hinge rods, a sliding plate is connected in the centrifugal cavity in a sliding mode, the end, far away from the first hinged rod, of the second hinged rod is hinged with the sliding plate, the sliding plate is provided with a through hole for the water wheel shaft to pass through, two sides of the sliding plate are fixedly connected with fixing shafts extending to the cavity, and the end, far away from the sliding plate, of each fixing shaft is connected in the curved groove in a limiting and sliding mode; the water wheel shaft is provided with an induction module and an alarm, the induction module is located in the transmission case and used for inducing the number of rotating turns of the water wheel shaft, and the alarm is connected with the induction module and used for sending an alarm signal when the number of rotating turns exceeds a preset alarm value.
Furthermore, a U-shaped protection plate is installed on the water-facing side of the lifting screw rod and used for preventing the lifting screw rod from being subjected to scouring pressure of the water-facing surface.
Further, the lifting screw rod is sleeved with a telescopic sleeve, the telescopic sleeve is connected with the sliding seat, and the telescopic sleeve is located on the inner side of the U-shaped protection plate.
Further, a net-shaped shell is installed at the bottom of the transmission case, and the water wheel is located in the net-shaped shell.
The invention also provides a lifting type foundation scouring monitoring method, which comprises the following steps:
a1: installing a foundation erosion monitoring device on a bridge pier, observing an original image of a riverbed foundation through a monitoring assembly, and sending the original image to a computer terminal connected with the monitoring assembly for recording;
a2: in the process that the monitoring component monitors the washing of the river bed foundation, the rotation turns of the water wheel shaft are sensed through the sensor, and a sensing signal is transmitted to the memory;
a3: recording the number of turns of the water wheel shaft through a memory, and alarming through an alarm connected with the memory when the number of turns exceeds a preset alarm value;
a4: and comparing the original image recorded by the computer terminal with the image after scouring, and analyzing the basic scouring amount by combining the rotation turns of the water wheel shaft when the alarm gives an alarm.
Further, in step a3, the preset alarm value calculation includes the following steps:
b1: analyzing scour early warning depth S around pier pile foundation by the following formula m ：
Figure BDA0003668725180000021
Wherein S is m For early warning depth of scouring around the pile foundation of the bridge pier, D is the pile foundation diameter of the bridge pier, D m Is the diameter of silt particle, V L Is the flow velocity of the water flow, g is the acceleration of gravity;
b2: analysis of the Water flow velocity V L With the rotational speed V of the water wheel Z The relation of (1):
Figure BDA0003668725180000022
wherein M is the rotation moment of the water wheel shaft, A isCross-sectional area of water wheel, H is head, n t The energy loss rate of water flow passing through the water wheel is shown;
b3: when the scouring depth around the bridge pier pile foundation reaches the early warning depth S m According to the rotating speed V of the water wheel z Determining an alarm value X of the number of rotation turns:
Figure BDA0003668725180000031
wherein t is at a rotational speed V Z And the water wheel rotates for one circle for required time.
Further, a plurality of basic scour monitoring devices are installed on the periphery of the pier, and in the step a4, the number of rotation turns of the water wheel shaft is an average value of the number of rotation turns of the plurality of water wheel shafts.
The invention has the beneficial effects that: when the water flow is too large, the lifting type foundation scouring monitoring device drives the sealing cover to rise through the water flow so as to prevent the sealing cover from being shielded or damaged due to the fact that silt carried by the water flow impacts the surface of the sealing cover; the sealing cover is driven to rise by the centrifugal force of the centrifugal ball, so that the rising height of the sealing cover is controllable; the influence of the water flow velocity on the basic scouring amount is analyzed through the number of rotation turns of the water wheel shaft, and the monitoring accuracy of the basic scouring amount is improved in a mechanical auxiliary monitoring mode. According to the lifting type foundation scour monitoring method, the foundation scour amount is analyzed through comparing the original image with the scoured image, and the analysis and calculation are carried out by combining the rotation turns of the water wheel shaft, so that the calculation accuracy of the scoured foundation scour amount is improved; the rotation through the water wheel axle plays mechanical auxiliary monitoring effect, has improved monitoring effect.
Additional advantages, objects, and features of the invention will be set forth in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof.
Drawings
In order to make the object, technical scheme and beneficial effect of the invention more clear, the invention provides the following drawings for explanation:
FIG. 1 is a front view of an embodiment of the present invention;
FIG. 2 is a side view of an embodiment of the present invention;
FIG. 3 is a schematic view of the installation of a water wheel according to an embodiment of the present invention;
fig. 4 is a schematic view illustrating the installation of the U-shaped shielding plate according to the embodiment of the present invention.
The drawings are numbered as follows: 1. a lifting screw rod; 2. a sliding seat; 3. a sealing cover; 4. a bridge pier; 5. a transmission case; 501. a water wheel; 502. a water wheel shaft; 503. a centrifugal chamber; 504. a cavity; 505. a first hinge lever; 506. a centrifugal ball; 507. a second hinge lever; 508. a slide plate; 509. a fixed shaft; 510. a wheel post; 511. a curved groove; 6. a U-shaped protection plate; 7. a telescopic sleeve; 8. a mesh-shaped shell.
Detailed Description
As shown in fig. 1 to 4, the present invention provides a lifting type foundation erosion monitoring device, including: install the lift lead screw 1 at 4 lateral walls of pier, threaded connection has a sliding seat 2 on the lift lead screw 1, install sealed cowling 3 on the sliding seat 2, install monitoring subassembly and lighting components in the sealed cowling 3, 4 lateral walls of pier install be located the transmission case 5 of sliding seat 2 below, the transmission case 5 bottom is rotated through water wheel axle 502 and is connected with water wheel 501, centrifugal chamber 503 and the symmetry setting are seted up in the transmission case 501 in the cavity 504 of centrifugal chamber 503 both sides, lift lead screw 1 extends to cavity 504 internal rotation connects, fixedly connected with wheel post 510 on the lift lead screw 1, wheel post 510 is located in the cavity 504, wheel post 510 lateral wall is equipped with curved groove 511, water wheel axle 502 extends to centrifugal chamber 503 internal rotation connects, water wheel axle 502 bilateral symmetry articulates there is first articulated pole 505, a centrifugal ball 506 is fixedly connected to the first hinge rod 505 away from the water wheel shaft 502, a second hinge rod 507 is hinged to the middle of the first hinge rod 505, a sliding plate 508 is connected in the centrifugal cavity 503 in a sliding manner, the end of the second hinge rod 507 away from the first hinge rod 505 is hinged to the sliding plate 508, the sliding plate 508 is provided with a through hole for the water wheel shaft 502 to pass through, fixing shafts 509 extending to the cavity 504 are fixedly connected to two sides of the sliding plate 508, and the end of the fixing shaft 509 away from the sliding plate 508 is connected in the curved groove 511 in a limiting and sliding manner; the utility model discloses a water wheel axle 502, including water wheel axle 502, sensing module and alarm, sensing module is located transmission case 5, sensing module is used for the response water wheel axle 502 pivoted number of turns, the alarm with sensing module is connected and is used for sending alarm signal when the number of turns surpasss preset alarm value.
The working principle of the technical scheme is as follows: as shown in fig. 1, during the monitoring process, the monitoring component monitors the image of the river bed, the lighting component illuminates, the outer side of the water wheel 501 is provided with a half shell surrounding the water wheel 501, the half shell surrounds half of the water wheel 501, when the water flow is too large, the water flow flows through the water wheel 501 to drive the water wheel shaft 501 to rotate, thereby driving the water wheel shaft 502 to rotate, thereby driving the first hinge rods 505 at both sides to rotate along with the water wheel shaft 502, thereby driving the centrifugal balls 506 to rotate, during the centrifugal force generated by the rotation of the centrifugal balls 506, the centrifugal balls 506 drive the first hinge rods 505 to rotate upwards, thereby driving the sliding plate 508 to move upwards through the second hinge rods 507, thereby driving the fixed shaft 509 to move upwards, the end of the fixed shaft 509 far away from the sliding plate 508 slides in the curved groove 511 in a limiting manner, thereby driving the wheel column 510 to rotate, thereby driving the lifting screw rod 1 to rotate, thereby driving the sliding seat 2 to move upwards, thereby driving the sealing cover 3 to move upwards and move out of the water surface, when the water flow is small, the water wheel 501 rotates slowly or even does not rotate, so that the centrifugal ball 506 does not rotate and generate centrifugal force, the centrifugal ball 506 descends under the action of gravity to enable the sliding plate 508 to descend, and the sealing cover 3 is driven to descend into the water to be continuously monitored through the monitoring assembly; the response module includes the sensor and the memory of being connected with the sensor, through the rotation number of turns of sensor response water wheel axle 502 to transmit inductive signal for the memory and store, when the rotation number of turns of water wheel axle 502 of memory record surpassed preset alarm value, because the alarm that the memory is connected sends alarm signal and need backfill the riverbed basis in order to prevent to produce the influence to the stability of pier with the suggestion people.
The beneficial effects of the above technical scheme are that: through the design of the structure, when the water flow is too large, the sealing cover 3 is driven to rise through the water flow, so that the sealing cover 3 is prevented from being shielded or damaged due to the fact that silt carried by the water flow impacts the surface of the sealing cover; the centrifugal force of the centrifugal ball 506 drives the sealing cover 3 to rise, so that the rising height of the sealing cover 3 is controllable; the influence of the water flow velocity on the basic scouring amount is analyzed by recording the number of rotation turns of the water wheel shaft 502, and the monitoring accuracy of the basic scouring amount is improved in a mechanical auxiliary monitoring mode.
In one embodiment of the invention, a U-shaped protection plate 6 is arranged on the water facing side of the lifting screw rod 1, and the U-shaped protection plate 6 is used for preventing the lifting screw rod 1 from being subjected to scouring pressure of the water facing side.
The working principle and the beneficial effects of the technical scheme are as follows: as shown in fig. 2 and 4, the upstream surface is the surface facing the flow direction of the water flow, and the U-shaped protection plate 6 is arranged to prevent the lifting screw rod 1 from deforming to influence the lifting of the sealing cover 3 due to the acting force of the water flow during strong flushing; because the effect of U-shaped guard plate 6, the velocity of flow of the rivers that are located the inboard of U-shaped guard plate 6 is comparatively steady, prevents lifting screw 1 atress deformation.
In one embodiment of the invention, a telescopic sleeve 7 is sleeved on the lifting screw rod 1, the telescopic sleeve 7 is connected with the sliding seat 2, and the telescopic sleeve 7 is positioned inside the U-shaped protection plate 6.
The working principle of the technical scheme is as follows: referring to fig. 1 and 2, the telescopic sleeves 7 are positioned at two sides of the sliding seat 2, sleeved on the lifting screw rod 1 and positioned at the inner side of the U-shaped protection plate 6.
The beneficial effects of the above technical scheme are that: by arranging the telescopic sleeve 7, the lifting screw rod 1 is prevented from rusting or being corroded to influence the lifting of the sealing cover 3 due to the fact that the lifting screw rod 1 is located in a water environment for a long time; and the telescopic sleeve 7 is positioned on the inner side of the U-shaped protection plate 6, so that the telescopic sleeve 7 is prevented from being deformed to influence the lifting of the sealing cover 3 due to the fact that water flow scours the telescopic sleeve 7.
In one embodiment of the present invention, a net-shaped housing 8 is installed at the bottom of the transmission case 5, and the water wheel 501 is located in the net-shaped housing 8.
The working principle of the technical scheme is as follows: as shown in fig. 3, a net-shaped housing 8 is installed at the bottom of the transmission case 5, one side of the net-shaped housing 8, which is in a diameter direction along a water flow direction, is closed (fig. 3 shows one side of the housing), and the other side of the net-shaped housing 8 is net-shaped (fig. 3 does not show one side of the housing), when the water flow flows through, a force is applied to the water wheel 501 on the net-shaped side to drive the water wheel 501 to rotate.
The beneficial effects of the above technical scheme are that: it is guaranteed that water flow can drive the water wheel 501 to rotate, and meanwhile, large garbage or organisms in the river are prevented from damaging the water wheel 501.
The invention also provides a lifting type foundation scouring monitoring method, which comprises the following steps of A1: installing a foundation erosion monitoring device on a bridge pier, observing an original image of a riverbed foundation through a monitoring assembly, and sending the original image to a computer terminal connected with the monitoring assembly for recording;
a2: in the process that the monitoring component monitors the washing of the river bed foundation, the rotation turns of the water wheel shaft 502 are sensed through the sensor, and a sensing signal is transmitted to the memory;
a3: the number of turns of the water wheel shaft 502 is recorded through a memory, and when the number of turns exceeds a preset alarm value, an alarm connected with the memory gives an alarm;
a4: and comparing the original image recorded by the computer terminal with the image after flushing, and analyzing the basic flushing amount by combining the rotation turns of the water wheel shaft 502 when the alarm gives an alarm.
The working principle of the technical scheme is as follows: when the foundation scouring monitoring device is installed on a bridge pier, an original image of a river bed foundation is observed through the monitoring assembly and is recorded by the computer terminal, after long-time scouring, particularly after strong scouring, silt can fly due to strong scouring to influence the visual field of the monitoring assembly, monitoring of the monitoring assembly is inconvenient, and the sealing cover is driven to rise to the water surface under the action of water flow during strong scouring, at the moment, the monitoring effect of the monitoring assembly is poor, during strong scouring, the water flow drives the water wheel shaft 502 to continuously rotate, the number of rotation turns of the water wheel shaft 502 is sensed through the sensor and is transmitted to the memory for storage, when the number of rotation turns of the water wheel shaft 502 recorded by the memory exceeds a preset alarm value, the alarm sends out an alarm signal to prompt people to backfill the river bed foundation to prevent influence on the stability of the bridge pier, and after the alarm signal is generated, after strong flushing, the flow velocity of water flow is stable, the monitoring assembly is driven to descend to the underwater to observe the river bed foundation image on the periphery of the pier after strong flushing, the original image and the image after flushing are compared, and the foundation flushing amount is calculated by combining rotation number analysis.
The beneficial effects of the above technical scheme are that: through the design of the method, the basic scouring amount is analyzed through comparing the original image with the scoured image, and the rotation turns of the water wheel shaft 502 are combined for analysis and calculation, so that the calculation accuracy of the scoured basic scouring amount is improved; the rotation of the water wheel shaft 502 plays a mechanical auxiliary monitoring role, and the monitoring effect is improved.
In one embodiment of the present invention, in step a3, the preset alarm value calculation includes the following steps:
b1: analyzing scour early warning depth S around pier pile foundation by the following formula m ：
Figure BDA0003668725180000061
Wherein S is m For early warning depth of scouring around the pile foundation of the bridge pier, D is the pile foundation diameter of the bridge pier, D m Is the diameter of silt particle, V L Is the flow velocity of the water flow, g is the acceleration of gravity;
b2: analysis of the Water flow velocity V L And the rotating speed V of the water wheel 501 z The relation of (c):
Figure BDA0003668725180000062
wherein M is the rotation moment of the water wheel shaft 502, A is the cross-sectional area of the water wheel 501, H is the water head, n is t Is the energy loss rate of the water flow passing through the water wheel 501;
b3: when the scouring depth around the bridge pier pile foundation reaches the early warning depth S m According to the water wheel 501Rotational speed V Z Determining an alarm value X of the number of rotation turns:
Figure BDA0003668725180000071
wherein t is at a rotational speed V Z Next, the water wheel 501 rotates for one turn for a required time.
The working principle of the technical scheme is as follows: when the alarm value X of the number of rotation turns of the water wheel 501 is determined, firstly, the early warning value S of the scouring depth around the pile foundation of the pier needs to be preset m When the scouring depth reaches S m At this time, the number of rotation turns X of the water wheel shaft 502 is the alarm value, and in step B2, since the water flow velocity is non-uniform, the velocity when driving the water wheel to rotate is also non-uniform, and therefore the water flow velocity V is set L And the rotational speed V of the water wheel 501 Z Are all unit time T i Inner flow rate of in unit time T i Velocity of water flow V L And the rotational speed V of the water wheel 501 Z Set to uniform speed by dividing the flush time T into an infinite number of segments T i The alarm value X is obtained by integrating the formulas in steps B1, B2, and B3.
The beneficial effects of the above technical scheme are that: through the design of the method, when the number of rotation turns reaches the preset alarm value X, an alarm signal can be sent out to prompt that the scouring depth reaches the early warning depth S m And simultaneously calculating the early warning depth S m And analyzing the basic scouring amount by combining the monitoring image, the monitoring accuracy is improved, the basic scouring amount is convenient to calculate, and meanwhile, because the energy loss rate n of water flowing through the water wheel 501 is analyzed in the step B2 t It can be known that water flow transmits a part of kinetic energy to the water wheel 501 after impacting the water wheel 501, so that the self energy is reduced, and the flow rate is reduced, therefore, by arranging the water wheel 501, the flow rate of water flow can be reduced to reduce the basic scouring amount.
In an embodiment of the present invention, a plurality of foundation erosion monitoring devices are installed on the periphery of the pier, and in step a4, the number of rotation turns of the water wheel shaft 502 is an average value of the number of rotation turns of the plurality of water wheel shafts 502.
The working principle and the beneficial effects of the technical scheme are as follows: the monitoring range is improved by arranging a plurality of foundation scouring monitoring devices on the peripheral side of the bridge pier; the calculation accuracy of the basic scouring amount is improved by analyzing the basic scouring amount with the average value of the number of rotation turns of the plurality of water wheel shafts 502.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.

Claims (7)

1. The utility model provides a basic monitoring devices that erodees of over-and-under type which characterized in that includes:
the lifting screw rod is installed on the side wall of a pier, a sliding seat is in threaded connection with the lifting screw rod, a sealing cover is installed on the sliding seat, a monitoring assembly and an illuminating assembly are installed in the sealing cover, a transmission box is installed on the side wall of the pier and located below the sliding seat, the bottom end of the transmission box is connected with a water wheel through a water wheel shaft in a rotating mode, a centrifugal cavity and cavities symmetrically arranged on two sides of the centrifugal cavity are formed in the transmission box, the lifting screw rod extends to the cavities and is connected in a rotating mode, a wheel column is fixedly connected to the lifting screw rod and located in the cavities, a curved groove is formed in the side wall of the wheel column, the water wheel shaft extends to the centrifugal cavity and is connected in a rotating mode, first hinge rods are symmetrically hinged to two sides of the water wheel shaft, centrifugal balls are fixedly connected to the ends, far away from the water wheel shaft, of the first hinge rods are hinged to the middle of the first hinge rods, a sliding plate is connected in the centrifugal cavity in a sliding manner, the end, away from the first hinge rod, of the second hinge rod is hinged with the sliding plate, the sliding plate is provided with a through hole for the water wheel shaft to pass through, two sides of the sliding plate are fixedly connected with fixing shafts extending to the cavity, and the ends, away from the sliding plate, of the fixing shafts are connected in the curved grooves in a limiting and sliding manner; the water wheel shaft is provided with an induction module and an alarm, the induction module is located in the transmission case and used for inducing the number of rotating turns of the water wheel shaft, and the alarm is connected with the induction module and used for sending an alarm signal when the number of rotating turns exceeds a preset alarm value.
2. The lift-type foundation scour monitoring device of claim 1, wherein: the U-shaped protection plate is installed on the water-facing side of the lifting screw rod and used for preventing the lifting screw rod from being subjected to scouring pressure of the water-facing side.
3. The lift-type foundation scour monitoring device of claim 2, wherein: the lifting screw rod is sleeved with a telescopic sleeve, the telescopic sleeve is connected with the sliding seat, and the telescopic sleeve is located on the inner side of the U-shaped protection plate.
4. The lift-type foundation scour monitoring device of claim 1, wherein: the bottom of the transmission case is provided with a net-shaped shell, and the water wheel is positioned in the net-shaped shell.
5. A lifting type foundation scouring monitoring method is characterized by comprising the following steps:
a1: installing a foundation erosion monitoring device according to any one of claims 1 to 4 on a bridge pier, observing an original image of a riverbed foundation through a monitoring component, and sending the original image to a computer terminal connected with the monitoring component for recording;
a2: in the process that the monitoring component monitors the washing of the river bed foundation, the rotation turns of the water wheel shaft are sensed through the sensor, and a sensing signal is transmitted to the memory;
a3: recording the number of turns of the water wheel shaft through a memory, and alarming through an alarm connected with the memory when the number of turns exceeds a preset alarm value;
a4: and comparing the original image recorded by the computer terminal with the image after scouring, and analyzing the basic scouring amount by combining the rotation turns of the water wheel shaft when the alarm gives an alarm.
6. The lift-type foundation scour monitoring method of claim 5, wherein the step A3 of calculating the preset alarm value comprises the steps of:
b1: analyzing scour early warning depth S around pier pile foundation by the following formula m ：
Figure FDA0003668725170000021
Wherein S is m For early warning depth of scouring around the pile foundation of the bridge pier, D is the pile foundation diameter of the bridge pier, D m Is the diameter of silt particle, V L Is the flow velocity of the water flow, g is the acceleration of gravity;
b2: analysis of the Water flow velocity V L With the rotational speed V of the water wheel Z The relation of (1):
Figure FDA0003668725170000022
wherein M is the rotation moment of the water wheel shaft, A is the cross-sectional area of the water wheel, H is the water head, n is t The energy loss rate of water flow passing through the water wheel is shown;
b3: when the scouring depth around the bridge pier pile foundation reaches the early warning depth S m According to the rotating speed V of the water wheel Z Determining an alarm value X of the number of rotation turns:
Figure FDA0003668725170000023
wherein t is at a rotational speed V Z And the water wheel rotates for one circle for required time.
7. The elevating foundation scour monitoring method according to claim 5, wherein a plurality of foundation scour monitoring devices are installed around the pier, and in step A4, the number of revolutions of the waterwheel shaft is an average value of the number of revolutions of the waterwheel shaft.
CN202210597562.3A 2022-05-30 2022-05-30 Lifting type foundation scouring monitoring device and method Pending CN115022587A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115451228A (en) * 2022-10-11 2022-12-09 中交第一公路勘察设计研究院有限公司 Automatic pipe diameter adjusting device for centralized drainage system of highway bridge
CN116497767A (en) * 2023-01-12 2023-07-28 西南交通大学 Intelligent sacrificial pile frame device for combined protection of mountain bridge pier scouring and abrasion

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115451228A (en) * 2022-10-11 2022-12-09 中交第一公路勘察设计研究院有限公司 Automatic pipe diameter adjusting device for centralized drainage system of highway bridge
CN116497767A (en) * 2023-01-12 2023-07-28 西南交通大学 Intelligent sacrificial pile frame device for combined protection of mountain bridge pier scouring and abrasion
CN116497767B (en) * 2023-01-12 2024-01-02 西南交通大学 Intelligent sacrificial pile frame device for combined protection of mountain bridge pier scouring and abrasion

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