A deep water group pile foundation erosion and deposition monitoring device

Abstract

The utility model discloses a kind of deepwater group pile foundation scouring and silting monitoring devices, it is related to bridge foundation monitoring technical field;Including: scouring and silting probe, for riverbed contact detection;Transmission device, connected with scouring and silting probe, for converting rotary motion into vertical linear motion of scouring and silting probe;Power device, it is installed at the pier above water surface and is connected with transmission device, realizes scouring and silting probe lifting control;Metering device, connected with transmission device, measures its vertical moving distance;Steering device, it is respectively installed on pier, pile cap and pile foundation, for changing the moving direction of transmission device;Pressure sensor module, it is installed on the corner of pile cap, for sensing the pressure applied by transmission device.The device has the advantages of simple structure, stable operation, low cost, etc., can provide long-term, reliable monitoring data support for bridge operation and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of bridge foundation monitoring technology, specifically to a deep-water pile foundation scour and siltation monitoring device. Background Technology

[0002] With the rapid development of transportation infrastructure, the scale of cross-sea and cross-river bridge construction is constantly expanding. As an important supporting structure of bridges, the stability of pile foundations is directly related to the long-term safe operation of bridges. In deep-water areas, bridges generally adopt the form of pier cap-pile foundations. If safety hazards occur in this type of foundation during operation, it will not only cause traffic disruption and significant economic losses, but may also lead to catastrophic accidents such as bridge collapse, seriously threatening the safety of people's lives and property.

[0003] Throughout the entire life cycle of a bridge, its foundation structure faces complex and ever-changing environmental challenges, among which soil erosion caused by water flow is particularly prominent. Especially in complex hydrological environments such as tidal estuaries and rivers with strong scouring, the maximum annual erosion depth of bridge foundations can reach 1.5-2.0 meters. Continuous erosion significantly weakens the interaction between the pile foundation and the surrounding soil, thereby reducing the overall structural resistance to earthquakes, wind, and other disasters. When encountering extreme conditions such as floods and typhoons, this cumulative damage can easily lead to structural instability, potentially resulting in catastrophic consequences.

[0004] Currently, bridge foundation scour monitoring mainly employs electronic monitoring technologies such as ultrasonic ranging, multibeam sonar detection, and fiber optic sensing. While these technologies offer high measurement accuracy, they still have significant limitations in practical engineering applications: First, electronic equipment has stringent installation requirements, necessitating complex underwater wiring and equipment debugging, which is not only difficult and time-consuming but also costly. Second, electronic equipment operating underwater for extended periods is susceptible to water corrosion, biofouling, and electromagnetic interference, resulting in a generally shorter lifespan and difficulty in meeting the monitoring needs throughout the bridge's entire lifecycle, leading to high maintenance and replacement costs.

[0005] Furthermore, when water turbidity is high, technologies such as ultrasonic ranging and multibeam sonar detection, based on the principle of sound wave propagation, face severe challenges. The large number of suspended particles in turbid water significantly absorbs and scatters sound wave energy, causing severe attenuation of the echo signal and a sharp drop in the signal-to-noise ratio, ultimately leading to significant deviations or even complete failure of the measurement data. This technical bottleneck is particularly pronounced in high-turbidity waters during flood season or after heavy rainfall, severely restricting the reliability and applicability of monitoring systems. Utility Model Content

[0006] The purpose of this invention is to provide a deep-water pile foundation scour and siltation monitoring device, which has significant advantages such as simple structure, stable operation and low cost, and can provide long-term and reliable monitoring data support for bridge operation and maintenance.

[0007] To achieve the above objectives, this application proposes a deep-water pile foundation scour and siltation monitoring device, comprising:

[0008] Scuffing and siltation probe, used for contact detection of riverbed;

[0009] The transmission device, connected to the silt flushing probe, is used to convert the rotational motion into the vertical linear motion of the silt flushing probe.

[0010] The power unit is installed on the bridge pier above the water surface and connected to the transmission device to realize the lifting and lowering control of the siltation probe;

[0011] A measuring device, connected to a transmission device, measures the vertical distance it moves.

[0012] Steering devices are installed on bridge piers, abutments, and pile foundations respectively, and are used to change the direction of movement of the transmission device;

[0013] The pressure sensor module is installed at the corner of the support platform to sense the pressure applied by the transmission device.

[0014] In one embodiment, the transmission device includes a stainless steel rope and a plurality of collars, the collars being fixedly disposed on the stainless steel rope at equal intervals.

[0015] In one embodiment, the power unit includes a servo motor and a cable tray, wherein the cable tray is fixedly mounted on the shaft of the servo motor; the cable tray is made of stainless steel and its structure is designed as a storage cavity with a cylindrical shape in the middle and baffles on both sides, which is specifically used for storing and releasing stainless steel ropes; the servo motor drives the cable tray to rotate, thereby realizing the vertical lifting and lowering movement of the stainless steel rope.

[0016] In one embodiment, the measuring device includes a digital counter and a counting paddle, the counting paddle being fixedly mounted on the rotating shaft of the digital counter; when the servo motor drives the transmission device to move, the collar fixed on the stainless steel rope moves with the rope and actuates the counting paddle, the digital counter measuring the distance the stainless steel rope moves by recording the number of times the counting paddle is actuated.

[0017] In one embodiment, the steering device includes a steering pulley, a support plate, and a pulley base for changing the direction of movement of the stainless steel rope; the steering pulley is rotatably mounted on the support plate via a pivot, the support plate and the pulley base are fixedly connected by welding, and the pulley base is provided with mounting holes for fixing to bridge piers, abutments, and pile foundations by bolts.

[0018] In one embodiment, the pressure sensor module includes a pressure sensor, a bracing plate, a support base, and a pressure measuring wheel. The pressure sensor is located below the support base, the bracing plate is welded and fixed to the support base and supports the pressure measuring wheel, and a stainless steel rope is tightly attached to the pressure measuring wheel. When the stainless steel rope is under force, the pressure is transmitted to the bracing plate through the pressure measuring wheel, and then transmitted to the pressure sensor through the support base for real-time detection. When the siltation probe contacts the riverbed, the pressure sensor determines the contact state between the probe and the riverbed by identifying pressure change signals.

[0019] In one embodiment, a first fixing device for limiting the stainless steel rope is provided on the pier and the abutment. The device includes a U-shaped buckle and a mounting base, wherein the U-shaped buckle is welded to the mounting base and the mounting base is fixed to the pier and the abutment by bolts, and the inner diameter of the U-shaped buckle is slightly larger than the outer diameter of the collar.

[0020] In one embodiment, a second fixing device for limiting the stainless steel rope is provided on the pile foundation. The device includes a clamp and a U-shaped limiter, wherein the clamp is fixedly installed on the pile foundation, the U-shaped limiter is connected to the clamp, and the inner diameter of the U-shaped limiter is slightly larger than the outer diameter of the collar.

[0021] In one embodiment, the silt-removing probe includes a connecting rod and a chassis, wherein the lower end of the connecting rod is welded and fixed to the chassis, and the upper end is connected to a stainless steel rope to form an integral force transmission structure.

[0022] In one embodiment, a counterweight is fixedly mounted on a stainless steel rope above the siltation probe, and its weight ensures that the stainless steel rope always remains vertically downward.

[0023] The advantages of the above technical solution adopted in this utility model compared with the prior art are:

[0024] 1. In terms of structural reliability, the use of complex electronic circuits and precision instruments is avoided, which not only facilitates on-site installation and maintenance, but also resists water flow impact and maintains stable monitoring performance during long-term operation, thereby improving the reliability and service life of the device.

[0025] 2. In terms of economic practicality, the manufacturing cost is significantly reduced while ensuring monitoring accuracy; the simple structural features ensure operational stability, thereby reducing later maintenance costs and the frequency of component replacement.

[0026] 3. In terms of monitoring performance, it achieves simultaneous monitoring of scour and siltation conditions; through the mechanical penetrating measurement principle, it can simultaneously acquire data on foundation scour depth and siltation thickness, providing more comprehensive and reliable basic data support for bridge safety assessment.

[0027] 4. In terms of environmental adaptability, the mechanical contact measurement scheme is adopted, which fundamentally avoids the measurement deviation problem of optical and acoustic monitoring equipment when the water is turbid. Attached Figure Description

[0028] Figure 1 A schematic diagram of a deep-water pile foundation scour and siltation monitoring device;

[0029] Figure 2 This is a schematic diagram of the power unit structure;

[0030] Figure 3 This is a schematic diagram of the metering device.

[0031] Figure 4 This is a schematic diagram of the steering device structure;

[0032] Figure 5 This is a schematic diagram of the pressure sensor module structure;

[0033] Figure 6 This is a schematic diagram of the first fixing device.

[0034] Figure 7 This is a schematic diagram of the transmission device structure;

[0035] Figure 8 This is a top view of the transmission device structure;

[0036] Figure 9 This is a schematic diagram of the second fixing device.

[0037] Figure 10 This is a top view of the second fixing device structure;

[0038] Figure 11 This is a schematic diagram of the silt flushing probe structure.

[0039] The numbers in the diagram are explained as follows: 1. Power unit, 2. Metering device, 3. Steering device, 4. Pressure sensor module, 5. First fixing device, 6. Transmission device, 7. Second fixing device, 8. Counterweight, 9. Flushing probe, 10. Stainless steel casing, 11. Controller.

[0040] 1.1 Cable tray, 1.2 Servo motor, 2.1 Counting lever, 2.2 Digital counter, 3.1 Steering pulley, 3.2 Support plate, 3.3 Pulley base, 4.1 Pressure sensor, 4.2 Diagonal brace, 4.3 Support base, 4.4 Pressure measuring wheel, 5.1 U-shaped buckle, 5.2 Mounting base, 6.1 Collar, 6.2 Stainless steel rope, 7.1 U-shaped limit switch, 7.2 Clamp, 9.1 Connecting rod, 9.2 Chassis. Detailed Implementation

[0041] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0042] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly specified. "Several" means one or more, unless otherwise expressly specified.

[0044] In the description of this application, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] like Figure 1 As shown, a deep-water pile foundation scour and siltation monitoring device includes a power unit 1, a metering device 2, a steering device 3, a pressure sensor module 4, a first fixing device 5, a transmission device 6, a second fixing device 7, a counterweight 8, a scour and siltation probe 9, a stainless steel shell 10, and a controller 11.

[0047] like Figure 2As shown, the power unit 1 includes a cable tray 1.1 and a servo motor 1.2. The cable tray 1.1 is made of stainless steel in a cylindrical shape and has baffles on both sides. It is fixed to the output shaft of the servo motor 1.2 by a key connection and is used to store and release the stainless steel rope 6.2. The servo motor 1.2 is bolted to the bridge pier above the horizontal plane and is used to drive the stainless steel rope 6.2 to rise and fall stably, providing power support for the device.

[0048] like Figure 3 As shown, the metering device 2 includes a digital counter 2.2 and a counting paddle 2.1. The rectangular counting paddle 2.1 made of stainless steel is fixedly installed on the rotating shaft of the digital counter 2.2, which is located below the servo motor 1.2. When the servo motor 1.2 drives the transmission device 6 to move, the collar 6.1 fixed on the stainless steel rope 6.2 moves with the rope and actuates the counting paddle 2.1. The digital counter 2.2 measures the displacement of the stainless steel rope 6.2 by recording the number of actuations, and then calculates the depth change value ΔH of scouring or silting.

[0049] like Figure 4 As shown, the steering device 3 includes a steering pulley 3.1, a support plate 3.2, and a pulley base 3.3. The steering pulley 3.1 is mounted on the support plate 3.2 via a shaft supported by a bearing. The support plate 3.2 and the pulley base 3.3 are fixedly connected by full welding. The pulley base 3.3 is provided with mounting holes and is fixedly installed at a predetermined position on a bridge pier, abutment, or pile foundation by bolts. It is used to guide the stainless steel rope 6.2 to change the transmission direction and maintain a stable transmission trajectory.

[0050] like Figure 5 As shown, the pressure sensor module 4 includes a pressure sensor 4.1, a bracing plate 4.2, a support base 4.3, and a pressure measuring wheel 4.4. The pressure sensor 4.1 is fixedly installed below the support base 4.3. The bracing plate 4.2 is welded and fixed to the support base 4.3 and supports the pressure measuring wheel 4.4. The stainless steel rope 6.2 is tightly attached to the pressure measuring wheel 4.4. When the pressure of the transmission device 6 is transmitted to the bracing plate 4.2 through the pressure measuring wheel 4.4, the pressure is transmitted to the pressure sensor 4.1 through the support base 4.3 for real-time monitoring. When the pressure sensor detects a significant pressure change signal, it indicates that the probe has contacted the riverbed, thereby determining the status of the scouring and silting probe 9.

[0051] like Figure 6 As shown, the first fixing device 5 includes a U-shaped buckle 5.1 and a mounting base 5.2. The U-shaped buckle 5.1 is welded to the mounting base 5.2, and the mounting base 5.2 is fixed to the pier and the abutment through mounting holes. The inner diameter of the U-shaped buckle 5.1 is slightly larger than the diameter of the collar 6.1, which effectively restricts the movement of the stainless steel rope 6.2.

[0052] like Figure 7-8As shown, the transmission device 6 includes a stainless steel rope 6.2 and 6.1 with equal spacing, the spacing of which is set according to the measurement accuracy requirements; the stainless steel rope 6.2 is a round steel wire rope with a diameter of 3-8mm (preferably 5mm); the 6.1 are fixedly installed on the stainless steel rope 6.2 at a preferred spacing of 5cm, and the total length of the stainless steel rope 6.2 is customized according to the actual monitoring requirements.

[0053] like Figure 9-10 As shown, the second fixing device 7 includes a U-shaped limiter 7.1 and a clamp 7.2. The clamp 7.2 is fastened to the pile foundation, and the U-shaped limiter 7.1 is fixed to the clamp 7.2 by bolts. Its inner diameter is 2-3mm larger than the diameter of the collar 6.1, which effectively restricts the lateral displacement of the stainless steel rope 6.2 and ensures transmission stability.

[0054] It should be noted that the counterweight 8 is set on the stainless steel rope 6.2 above the siltation probe 9, and its weight meets the following two conditions: (1) the stainless steel rope 6.2 always maintains a vertical downward working posture; (2) under the impact of water flow, the lateral deformation of the stainless steel rope 6.2 is controlled within the allowable range.

[0055] like Figure 11 As shown, the silt-flushing probe 9 includes a cylindrical connecting rod 9.1 and a circular base plate 9.2, wherein the lower end of the connecting rod 9.1 is welded and fixed to the base plate 9.2, and the upper end is directly connected to the stainless steel rope 6.2.

[0056] The stainless steel casing 10 encloses and protects the core components such as the power unit 1, metering device 2, and controller 11, preventing them from being affected by external environmental factors and extending the service life of the device. The thickness of the stainless steel casing 10 is 2-4 mm, preferably 3 mm.

[0057] It should be noted that the servo motor 1.2, digital counter 2.2, and pressure sensor 4.1 are all connected to the controller. The controller automatically drives the servo motor 1.2 to operate according to a preset monitoring cycle (which can be set from 1 to 24 hours), and drives the scouring and silting probe 9 to perform lifting and lowering measurement operations through the stainless steel rope 6.2. The controller collects the displacement data of the digital counter 2.2 and the bottom-touching signal of the pressure sensor 4.1 and transmits them to the remote monitoring platform, so that relevant personnel can obtain information on the scouring and silting of the bridge foundation in a timely manner.

[0058] The working process of the above-mentioned deep-water pile foundation scour and siltation monitoring device is as follows:

[0059] S1. After the device is installed, the transmission device 6 is slowly lowered using the power device 1, and the pressure data of the pressure measuring device 4 is monitored. When the pressure measurement value suddenly decreases, it indicates that the siltation probe 9 has contacted the ground, and the lowering should be stopped immediately. At this time, the lowering distance value of the transmission device 6 measured by the metering device 2 is set as the initial value H0.

[0060] S2. Use the power unit 1 to slowly lift the transmission device 6, and at the same time use the metering device 2 to measure the lifting distance in real time. Stop lifting when the silt-removing probe 9 is a certain height Δh above the ground. Δh can preferably be 50cm.

[0061] S3. After a time interval Δt, the power unit 1 slowly lowers the transmission device 6, while the metering device 2 measures the lowering distance in real time and monitors the pressure data of the pressure measuring device 4. When the pressure measurement value suddenly decreases, it indicates that the scouring probe 9 has contacted the ground, and the lowering is stopped immediately. At this time, the lowering distance H1 measured by the metering device 2 is calculated, and the scouring depth ΔH = H1 - H0 is calculated. If ΔH > 0, the ground is scoured; if ΔH < 0, the ground is silted up.

[0062] S4. Repeat steps S2 and S3 to continuously measure the surface scour and sedimentation depth ΔH.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A deep-water pile foundation scour and siltation monitoring device, characterized in that, include: Scuffing and siltation probe, used for contact detection of riverbed; The transmission device, connected to the silt flushing probe, is used to convert the rotational motion into the vertical linear motion of the silt flushing probe. The power unit is installed on the bridge pier above the water surface and connected to the transmission device to realize the lifting and lowering control of the siltation probe; A measuring device, connected to a transmission device, measures the vertical distance it moves. Steering devices are installed on bridge piers, abutments, and pile foundations respectively, and are used to change the direction of movement of the transmission device; The pressure sensor module is installed at the corner of the support platform to sense the pressure applied by the transmission device.

2. The deep-water pile foundation scour and siltation monitoring device according to claim 1, characterized in that, The transmission device includes a stainless steel rope and multiple collars, which are fixedly mounted on the stainless steel rope at equal intervals.

3. The deep-water pile foundation scour and siltation monitoring device according to claim 2, characterized in that, The power unit includes a servo motor and a cable tray, wherein the cable tray is fixedly installed on the rotating shaft of the servo motor; the cable tray is made of stainless steel and its structure is designed as a storage cavity with a cylindrical shape in the middle and baffles on both sides, which is specifically used for loading and unloading stainless steel ropes; the servo motor drives the cable tray to rotate, thereby realizing the vertical lifting and lowering movement of the stainless steel ropes.

4. The deep-water pile foundation scour and siltation monitoring device according to claim 3, characterized in that, The measuring device includes a digital counter and a counting lever. The counting lever is fixedly installed on the rotating shaft of the digital counter. When the servo motor drives the transmission device to move, the collar fixed on the stainless steel rope moves with the rope and actuates the counting lever. The digital counter measures the distance the stainless steel rope moves by recording the number of times the counting lever is actuated.

5. The deep-water pile foundation scour and siltation monitoring device according to claim 2, characterized in that, The steering device includes a steering pulley, a support plate, and a pulley base, used to change the direction of movement of the stainless steel rope; the steering pulley is rotatably mounted on the support plate via a rotating shaft, the support plate and the pulley base are fixedly connected by welding, and mounting holes are provided on the pulley base, which is then fixedly mounted on the bridge pier, abutment, and pile foundation by bolts.

6. The deep-water pile foundation scour and siltation monitoring device according to claim 2, characterized in that, The pressure sensor module includes a pressure sensor, a bracing plate, a support base, and a pressure measuring wheel. The pressure sensor is located below the support base. The bracing plate is welded and fixed to the support base and supports the pressure measuring wheel. A stainless steel rope is tightly attached to the pressure measuring wheel. When the stainless steel rope is under stress, the pressure is transmitted through the pressure measuring wheel to the bracing plate, and then through the support base to the pressure sensor for real-time detection. When the siltation probe contacts the riverbed, the pressure sensor determines the contact state between the probe and the riverbed by identifying pressure change signals.

7. The deep-water pile foundation scour and siltation monitoring device according to claim 2, characterized in that, A first fixing device for limiting the stainless steel rope is installed on the pier and the abutment. The device includes a U-shaped buckle and a mounting base. The U-shaped buckle is welded to the mounting base and the mounting base is fixed to the pier and the abutment by bolts. The inner diameter of the U-shaped buckle is slightly larger than the outer diameter of the collar.

8. The deep-water pile foundation scour and siltation monitoring device according to claim 1, characterized in that, A second fixing device for limiting the stainless steel rope is installed on the pile foundation. The device includes a clamp and a U-shaped limiter. The clamp is fixedly installed on the pile foundation, and the U-shaped limiter is connected to the clamp. The inner diameter of the U-shaped limiter is slightly larger than the outer diameter of the collar.

9. The deep-water pile foundation scour and siltation monitoring device according to claim 1, characterized in that, The siltation probe includes a connecting rod and a base, wherein the lower end of the connecting rod is welded and fixed to the base, and the upper end is connected to a stainless steel rope to form an integral force transmission structure.

10. The deep-water pile foundation scour and siltation monitoring device according to claim 1, characterized in that, A counterweight is fixedly installed on the stainless steel rope above the siltation probe, and its weight ensures that the stainless steel rope always remains vertically downward.

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