Underwater pile foundation scouring depth monitoring device
By installing a wire-type displacement sensor and a pull-down component on the underwater pile foundation, the vertical displacement change in the circumferential direction of the pile foundation is monitored, which solves the problems of real-time monitoring and high cost in the existing technology, and realizes high-precision and low-cost monitoring of pile foundation scour depth.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2026-03-24
AI Technical Summary
Existing underwater pile foundation scour depth monitoring devices cannot achieve real-time monitoring and are expensive.
The monitoring device consists of a pull-wire displacement sensor and a pull-down component. The displacement monitor and the pull-down component are connected by a pull-down wire. By making close contact between the pull-down component and the riverbed, the vertical displacement change in the circumferential direction of the pile foundation is monitored, and the scour depth is measured in real time.
It enables real-time monitoring of the scour depth of underwater pile foundations, with high measurement accuracy and low cost, and can promptly assess the scour status of the pile foundations.
Smart Images
Figure CN224034640U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to bridge pile foundation scouring depth monitoring technical field, concretely relates to a underwater pile foundation scouring depth monitoring device. BACKGROUND
[0002] Bridge pile foundation is an important component in bridge construction, which bears the weight and load of the bridge and plays a stabilizing and supporting role. In bridge construction, the design and construction of pile foundation are crucial, as they will directly affect the safety and stability of the bridge. The scouring problem faced by bridge pile foundation cannot be underestimated, and the damage and destruction of the bridge caused by water flow scouring are the focus of bridge structure health monitoring. Among the existing means of monitoring the scouring depth of underwater pile foundation, fixed instrument monitoring and portable instrument monitoring are mainly used, and the principles adopted are mainly sonar technology and multi-beam method, which are generally high in cost and cannot be monitored in real time.
[0003] In view of this, the present patent application is proposed. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a underwater pile foundation scouring depth monitoring device, which solves the technical problems of current inability to monitor the scouring depth of underwater pile foundation in real time and high cost.
[0005] The utility model realizes the following technical scheme:
[0006] A underwater pile foundation scouring depth monitoring device, comprising a displacement monitor, a pull-down piece and a pull-down line, the displacement monitor is a pull-wire displacement sensor, the displacement monitor is arranged on the underwater pile foundation, the pull-down piece and the displacement monitor are connected through the pull-down line, the pull-down piece is located on the outer side of the underwater pile foundation, and the pull-down piece pulls the displacement monitor through the pull-down line to perform monitoring.
[0007] As a preferred design, the displacement monitor is installed in a containing box, the containing box is installed on the pile foundation, and the containing box is provided with a perforation for the pull-down line to pass through.
[0008] As a preferred design, the containing box can be detachably installed on the pile foundation.
[0009] As a preferred design, the containing box is a ring-shaped box body, and the containing box is sleeved on the outside of the pile column of the pile foundation.
[0010] As a preferred design, the ring-shaped box body is provided with an openable and closable top cover, forming an openable and closable containing structure.
[0011] As a preferred design, the displacement monitor is provided with four, and is evenly distributed in the containing box.
[0012] As a preferred design, the pull-down member is a tubular structure with one end open and the other end closed, and the inside of the tube of the pull-down member is filled with concrete.
[0013] As a preferred design, a filling hole is provided on the tube body of the pull-down component, and the filling hole is located near the closed end of the pull-down component.
[0014] As a preferred design, the outer casing of the pile foundation is provided with an annular clamp, and the annular clamp is provided with multiple limiting claws, with the pull-down member passing through each of the corresponding limiting claws.
[0015] As a preferred design, two annular clamps are spaced apart, and the through hole in the middle of the limiting claw is a trapezoidal circular hole, with the diameter of the hole at the end closer to the displacement monitor being smaller than the diameter of the hole at the other end.
[0016] And / or, the limiting claw is trapezoidal in shape.
[0017] The advantages and beneficial effects of this utility model compared to the prior art are:
[0018] This utility model provides an underwater pile foundation scour depth monitoring device, which uses the vertical displacement of several steel pipes arranged close to the pile foundation in the circumference to determine the scour depth around the pile foundation. It has a wide range, high measurement accuracy, can monitor in real time, and is low in cost. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the exemplary embodiments of this utility model, the drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:
[0020] Figure 1 This is a schematic diagram of the structure of an underwater pile foundation scour depth monitoring device installed on a pile foundation, as provided by this utility model.
[0021] Figure 2 This is a schematic diagram of the structure of the pull-down member of this utility model in conjunction with the annular clamp and the limiting claw.
[0022] Figure 3 This is a schematic diagram showing the distribution of displacement monitors within the housing.
[0023] Figure 4 This is a side view of the ring-shaped clamp.
[0024] Figure 5 This is a schematic diagram of the structure of the pull-down steel pipe.
[0025] Fig.:
[0026] 1 - displacement monitor, 2 - pull-down piece, 3 - pull-down line, 4 - containing box, 5 - perfusion hole, 6 - ring hoop, 7 - limit claw. DETAILED DESCRIPTION
[0027] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below with examples and drawings. The schematic embodiments of the present application and the description thereof are only used to explain the present application, and not as a limitation on the present application.
[0028] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application can be practiced without these specific details. In other instances, well-known structures, circuits, materials or processes have not been described in detail in order to avoid obscuring the present application.
[0029] Throughout this specification, the recitation of "one embodiment," "an embodiment," "one example," or "an example" means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment of the application. Therefore, the appearance of the phrases "in one embodiment," "in an embodiment," "in one example," or "in an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics can be combined in any suitable
[0030] In the description of the present application, the terms "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application.
[0031] Example 1:
[0032] As Figure 1As shown in the embodiment, the underwater pile foundation scouring depth monitoring device comprises a displacement monitor 1, a pull-down piece 2, and a pull-down line 3. The displacement monitor 1 is a pull-wire displacement sensor. The displacement monitor 1 is installed on the underwater pile foundation, and can be installed on the upper part of the pile foundation and above the water level. The sensor can be provided in multiple numbers and arranged along the circumferential surface of the pile foundation. The pull-down piece 2 is connected to the displacement monitor 1 through the pull-down line 3. Multiple pull-down pieces 2 are arranged in close proximity to the circumferential surface of the underwater pile foundation. The pull-down pieces 2 are in close contact with the riverbed by relying on the gravity of the pull-down pieces 2. The pull-down pieces 2 can move vertically along the outer side of the pile foundation, so as to pull the displacement monitor 1 through the pull-down line 3 to realize real-time monitoring.
[0033] In use, the displacement sensor is first installed on the top of the pile foundation, and then the pull-down piece 2 is connected below the pull-down line 3. The length of the pull-down piece 2 in the vertical direction should be greater than or equal to the depth from the water surface to the riverbed plus the maximum predicted scouring depth. A part of the pull-down piece 2 is above the water level, and a part is below the water level and above the riverbed line. Figure 1 The water level and the riverbed line are shown in the embodiment.
[0034] When the riverbed at the bottom of the pile foundation is scoured, the pull-down line 3 will be vertically displaced, and the displacement change is accurately recorded by the pull-wire displacement sensor at the top. By monitoring the vertical displacement change of the multiple pull-down pieces 2 around the pile foundation, the scouring condition of the circumferential surface of the pile foundation can be obtained, and real-time monitoring of the scouring of the bridge pile foundation can be realized. Compared with the existing fixed instrument monitoring and portable instrument monitoring, the device not only can realize monitoring, but also has the advantages of simple structure and low cost.
[0035] Further, the displacement monitor 1 is installed in a containing box 4, and the containing box 4 is installed on the pile foundation. The containing box 4 is a closed structure for protecting the displacement monitor 1, and a through hole is provided on the containing box 4 for the pull-down line 3 to pass through. The containing box 4 can be installed on the bridge pile foundation by means of the beam or the cap above the bridge pile foundation.
[0036] Better, the containing box 4 can be detachably installed on the pile foundation. For example, the containing box 4 can be provided as a ring-shaped box body, and the containing box 4 is sleeved on the outer side of the pile column of the pile foundation and is vertically supported by the cross beam of the pile foundation to stabilize the containing box 4. In order to facilitate maintenance and data checking, the containing box 4 is designed as a structure that can be opened and closed, for example, an openable and closable top cover is provided on the ring-shaped box body to form an openable and closable containing structure. Specifically, the containing box 4 that can be sleeved on the pile foundation and can be opened and closed can adopt the existing technology, which will not be described here. In the embodiment, the displacement monitor 1 is preferably provided in four numbers and is evenly distributed in the containing box 4 at an interval of 90°.
[0037] Embodiment 2:
[0038] On the basis of embodiment 1, as Figure 3 And 4 Further, the pull-down piece 2 is designed as a tubular structure with one end open and one end closed, such as a steel pipe, and concrete is poured into the pipe body of the pull-down piece 2. In order to avoid the blockage in the pipe body during pouring of the concrete, a pouring hole 5 is formed on the pipe body of the pull-down piece 2, and the pouring hole 5 is arranged close to the closed end of the pull-down piece 2, such as being arranged within 1m from the closed end of the pull-down piece 2. This design can also increase the weight of the pull-down piece 2 as a whole, ensure that the bottom of the pull-down piece 2 is in close contact with the riverbed, and also ensure the vertical stability of the pull-down piece 2.
[0039] Further, an annular hoop 6 is arranged on the outer part of the pile foundation, two annular hoops 6 can be arranged, one on the upper half of the pile foundation and one on the lower half of the pile foundation, a plurality of limiting clamping claws 7 are fixedly arranged on the annular hoop 6, a through hole is arranged in the middle of the limiting clamping claw 7, and the through hole is a trapezoidal round hole, one end of which is large and the other end of which is small, the aperture of the end close to the displacement monitor 1 is smaller, and the aperture of the other end is larger, the pull-down piece 2 penetrates through the corresponding limiting clamping claws 7, and the limiting clamping claws 7 are arranged in multiple numbers, such as 3, 4, 5 or 6, and in the embodiment, four limiting clamping claws 7 are arranged and are uniformly distributed on the outer ring of the annular hoop 6 at intervals of 90°. The limiting clamping claws 7 are used to limit the pull-down piece 2 in the horizontal and vertical directions, so as to avoid that the monitoring result is inaccurate due to the influence of waves and other external environments during the monitoring. In the embodiment, the shape of the limiting clamping claw 7 is designed as a trapezoidal shape, the length of the upper base of the trapezoid is slightly larger than the outer diameter of the pull-down piece 2, so that the pull-down piece 2 can still move vertically.
[0040] In the embodiment, the influence of water waves on the device is very small through the concrete pouring and weight increasing of the bottom of the steel pipe (the pull-down piece 2) and the vertical constraint of the two layers of annular hoops on the steel pipe.
[0041] The use method of the underwater pile foundation scouring depth monitoring device is as follows:
[0042] 1. First, a detachable annular containing box is built at the position of the beam or the pile cap above the bridge pile foundation, four pull wire displacement sensors are arranged in the annular containing box at intervals of 90°, small holes are formed below the sensors, and the pull-down wire 3 is stretched out through the small holes.
[0043] 2. A steel pipe is connected below the pull-down wire 3, the length of the φ108 steel pipe is determined (≥ the depth from the water surface to the riverbed + the maximum predicted scouring depth) by comprehensively considering the depth from the water surface to the riverbed and the maximum predicted scouring depth, and the concrete is poured into the steel pipe in advance to further ensure the vertical stability of the steel pipe and ensure that the bottom of the steel pipe is in close contact with the riverbed.
[0044] 3. In the middle and upper part and the middle and lower part of the pile foundation, respectively install detachable hoop, the hoop should be close to the pile foundation. As Figure 2 , 4 outside extending trapezoidal limit clamping pawls 7 are arranged according to 90 ° hoop interval outside the hoop.
[0045] 4. As Figure 1 , 4 aforementioned designed steel pipes are respectively aligned and passed through the limit clamping pawls 7 extending outside the hoop. The top end of the steel pipe is connected with the downward pull wire 3 below the aforementioned sensor, and the bottom of the steel pipe is in close contact with the riverbed below the pile foundation. When the riverbed of the pile foundation is scoured, the bottom of the steel pipe sinks, the top of the steel pipe drives the pull wire to generate vertical displacement, and the pull wire displacement sensor records the displacement as the scouring depth of the bottom of the point. At the same time, since the 4 steel pipes are arranged according to 90 ° hoop interval, the scouring depth of the bottom of the 4 points can basically obtain the scouring depth of the bottom of the pile foundation around the hoop, and the hidden danger and possible consequences are comprehensively judged, so that relevant personnel can take corresponding treatment measures.
[0046] According to the diameter of the pile foundation, the complexity of the bottom riverbed and other actual conditions, when 4 steel pipes cannot meet the measurement requirements, the number of steel pipes and the number of pull wire displacement sensors can be increased.
[0047] The above specific embodiments further specifically describe the purpose, technical scheme and beneficial effects of the utility model, and it should be understood that the above is only a specific embodiment of the utility model, and is not used to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A device for monitoring the scour depth of underwater pile foundations, characterized in that, The device includes a displacement monitor (1), a pull-down component (2), and a pull-down wire (3). The displacement monitor (1) is a pull-down type displacement sensor. The displacement monitor (1) is installed on the underwater pile foundation. The pull-down component (2) is connected to the displacement monitor (1) through the pull-down wire (3). The pull-down component (2) is located on the outside of the underwater pile foundation. The pull-down component (2) pulls the displacement monitor (1) through the pull-down wire (3) to monitor the displacement.
2. The underwater pile foundation scour depth monitoring device according to claim 1, characterized in that, The displacement monitor (1) is installed in the housing (4), which is installed on the pile foundation. The housing (4) has a through hole for the pull-down wire (3) to pass through.
3. The underwater pile foundation scour depth monitoring device according to claim 2, characterized in that, The container (4) can be detachably installed on the pile foundation.
4. The underwater pile foundation scour depth monitoring device according to claim 3, characterized in that, The container (4) is an annular box, and the container (4) is fitted onto the outside of the pile column of the pile foundation.
5. The underwater pile foundation scour depth monitoring device according to claim 4, characterized in that, The annular box is equipped with an openable and closable top cover, forming an openable and closable accommodating structure.
6. The underwater pile foundation scour depth monitoring device according to any one of claims 2 to 4, characterized in that, Four displacement monitors (1) are provided and are evenly distributed in the container (4).
7. The underwater pile foundation scour depth monitoring device according to claim 6, characterized in that, The pull-down member (2) is a tubular structure with one end open and the other end closed, and the tube of the pull-down member (2) is filled with concrete.
8. The underwater pile foundation scour depth monitoring device according to claim 7, characterized in that, An injection hole (5) is provided on the tube body of the pull-down member (2), and the injection hole (5) is located near the closed end of the pull-down member (2).
9. A device for monitoring the scour depth of underwater pile foundations according to claim 7 or 8, characterized in that, The pile foundation outer sleeve is provided with an annular clamp (6), and the annular clamp (6) is provided with multiple limiting claws (7), and the pull-down piece (2) passes through each corresponding limiting claw (7).
10. The underwater pile foundation scour depth monitoring device according to claim 9, characterized in that, The ring clamp (6) is provided in two at intervals, and the through hole provided in the middle of the limiting claw (7) is a trapezoidal round hole, with the diameter of the hole at the end near the displacement monitor (1) being smaller than the diameter of the hole at the other end. And / or, the limiting claw (7) is trapezoidal in shape.