A sunken tube freeboard monitoring system and monitoring method

Abstract

The present invention belongs to the technical field of immersed tube measurement, and particularly relates to an immersed tube freeboard monitoring system and a monitoring method. The immersed tube freeboard monitoring system includes a measurement assembly, an elevation measurement device and a server; the measurement assembly includes a limit bucket and a floating prism rod, the bottom of the limit bucket is hollowed out, and the top of the bucket is connected to the top of the immersed tube through a connecting plate so that the limit bucket is vertically suspended outside the immersed tube. One end of the connecting plate close to the top of the immersed tube is provided with a first prism; the floating prism rod is vertically inserted into the limit bucket and can reciprocate vertically, and a second prism is provided at the top of the rod. The floating prism rod can float to the water surface as a whole; the elevation measurement device is installed on the shore to collect the elevation data of the first prism and the second prism in real time and upload them to the server; the calculation module in the server calculates the freeboard of the immersed tube in real time. The present invention can monitor the freeboard of the immersed tube in the storage area in real time, improve the measurement accuracy and reduce the measurement risk.

Description

Technical Field

[0001] The invention belongs to the technical field of immersed tube measurement, and in particular relates to an immersed tube freeboard monitoring system and a monitoring method. Background Art

[0002] After the immersed tube is prefabricated in the dry dock area, it needs to be floated and winched to the storage area in the water for storage. During the storage period of the immersed tube, it is necessary to frequently measure the freeboard of the immersed tube to timely understand the storage status of the immersed tube and prevent the immersed tube from touching the bottom or being damaged due to the influence of water flow, wind and waves.

[0003] The freeboard of an immersed tube refers to the height difference between the top of the immersed tube and the water surface when the immersed tube floats in the water. At present, the freeboard measurement of immersed tubes during storage is usually carried out manually with a steel ruler. On the one hand, this measurement method requires the surveyor to stand at the edge of the immersed tube to perform the water-side measurement, which poses a great safety risk; on the other hand, the manual measurement data has low accuracy and cannot achieve real-time monitoring of the freeboard of the immersed tube. Summary of the invention

[0004] In view of the shortcomings existing in the related art, the present invention provides a immersed tube freeboard monitoring system and a monitoring method, which can monitor the real-time freeboard of immersed tubes in the storage area in real time, improve the measurement accuracy and reduce the measurement risk.

[0005] The present invention provides a immersed tube freeboard monitoring system, comprising:

[0006] The measuring assembly is arranged on the side of the immersed tube, and the measuring assembly specifically includes:

[0007] The limit barrel has a hollow bottom and a connecting plate at the top of the barrel. The end of the connecting plate away from the limit barrel is connected to the top of the immersed tube, so that the limit barrel is vertically suspended outside the immersed tube; a first prism is provided on the end of the connecting plate close to the top of the immersed tube;

[0008] The floating prism rod is vertically inserted into the limit barrel and can move back and forth vertically; a second prism is arranged at the top of the floating prism rod, and the second prism is always higher than the top of the limit barrel; the floating prism rod can float on the water surface as a whole;

[0009] An elevation measuring device, set up on the shore, for collecting elevation data of the first prism and the second prism in real time;

[0010] The server is connected to the elevation measurement device for real-time reading of the elevation data of the first prism and the second prism; a calculation module is provided in the server for real-time calculation of the real-time freeboard of the immersed tube according to the elevation data of the first prism and the second prism.

[0011] In the above technical solution, through the arrangement of the limiting barrel and the floating prism rod, the height difference between the top of the immersed tube and the bottom surface of the floating prism rod is equal to the freeboard of the immersed tube. Furthermore, through the combined application of the elevation measurement device and the server, the real-time automatic monitoring of the freeboard of the immersed tube in the storage area can be realized. Compared with the method of manually holding a steel tape to measure the freeboard of the immersed tube near the water in the prior art, this technical solution can improve the measurement accuracy and reduce the measurement risk.

[0012] In some of these embodiments, the floating prism rod includes a strip-shaped carbon rod and a plastic hollow ball connected to the bottom end of the strip-shaped carbon rod. The second prism is installed at the top of the strip-shaped carbon rod; the center of the plastic hollow ball is located on the central axis of the strip-shaped carbon rod. This technical solution realizes the lightweight design of the floating prism rod, ensuring that the floating prism rod can float to the water surface as a whole when the immersed tube is in the storage area.

[0013] In some of these embodiments, a limiting opening is provided at the center of the top of the limiting barrel. The strip-shaped carbon rod passes through the limiting opening, and the shape and size of the limiting opening match the cross-sectional shape and size of the strip-shaped carbon rod; the diameter of the plastic hollow ball is adapted to the inner diameter of the limiting barrel. This technical solution realizes the mutual cooperation between the floating prism rod and the limiting barrel, ensuring that the floating prism rod can accurately move vertically and will not deviate in angle during the movement, thereby improving the measurement accuracy.

[0014] In some of these embodiments, the cross-sectional shape of the strip-shaped carbon rod is any one of a rectangle, a triangle, and a trapezoid.

[0015] In some of these embodiments, the elevation measurement device includes two surveying robots, which are respectively installed on two forced centering piers buried on the shore to respectively and real-time collect the elevation data of the first prism and the second prism and upload the data to the server in real time.

[0016] The present invention also provides a method for monitoring the freeboard of an immersed tube, which is used to monitor the real-time freeboard of the immersed tube in the storage area in real time. It is carried out by using the aforementioned immersed tube freeboard monitoring system, and includes the following steps:

[0017] In the dry dock area, install the measurement component on the immersed tube, and make the height difference between the bottom of the limiting barrel and the top of the immersed tube greater than the preset freeboard value of the immersed tube in the storage area; measure the length L from the bottom surface of the floating prism rod to the center of the second prism, and measure the height difference △H from the center of the first prism to the top of the immersed tube;

[0018] On the shore of the storage area, set up the elevation measurement device and aim at the first prism and the second prism;

[0019] Transport the immersed tube by floating and winching it to the storage area. The elevation measurement device real-time collects the elevation H1 of the first prism and the elevation H2 of the second prism, and uploads them to the server in real time. The calculation module calculates the real-time freeboard F of the immersed tube in real time, and its calculation formula is as follows:

[0020] F = L - (H2 - H1 - ΔH).

[0021] The above technical solution realizes the real-time automatic monitoring of the freeboard of the immersed tube in the storage area, and has high measurement accuracy and low measurement risk.

[0022] In some of these embodiments, in the dry dock area, two sets of measurement components are symmetrically installed on the left and right sides at the front end of the immersed tube, and another two sets of measurement components are symmetrically installed on the left and right sides at the rear end of the immersed tube; on the shore of the storage area, four sets of elevation measurement devices corresponding to the four sets of measurement components are erected; the calculation module calculates the real-time freeboard F1 at the left side of the front end of the immersed tube, the real-time freeboard F2 at the right side of the front end of the immersed tube, the real-time freeboard F3 at the left side of the rear end of the immersed tube, and the real-time freeboard F4 at the right side of the rear end of the immersed tube in real time. This technical solution realizes the real-time automatic monitoring of the freeboard at the four corners of the immersed tube in the storage area, and thus can more comprehensively understand the storage state of the immersed tube.

[0023] Based on the above technical solution, the immersed tube freeboard monitoring system and monitoring method in the embodiments of the present invention solve the problems of large operation risk and low measurement accuracy existing in the prior art of manually holding a steel tape to measure the freeboard of the immersed tube near water, realize the real-time automatic monitoring of the freeboard of the immersed tube in the storage area, and significantly improve the measurement accuracy and reduce the measurement risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and the schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 is a schematic diagram of the working state of the immersed tube freeboard monitoring system of the present invention;

[0026] Figure 2 is a top view of the limit bucket in the immersed tube freeboard monitoring system of the present invention;

[0027] Figure 3 is a flowchart of the immersed tube freeboard monitoring method of the present invention.

[0028] In the figure:

[0029] 1. Immersed tube; 2. Limit bucket; 21. Support plate; 22. Limit opening; 3. Connecting plate; 4. First prism; 5. Floating prism rod; 51. Strip-shaped carbon rod; 52. Plastic hollow ball; 6. Second prism. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "transverse", "longitudinal", "upper", "lower", "top", "bottom", "inner", "outer", "left", "right", "front", "rear", "vertical", "horizontal", etc. indicate the orientation or positional relationship based on the Figure 1 orientation or positional relationship shown, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0032] The terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features.

[0033] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0034] Refer to Figure 1 As shown, the immersed tube freeboard monitoring system of the present invention includes a measurement assembly disposed on the side of the immersed tube 1, an elevation measurement device installed on the shore, and a server communicatively connected to the elevation measurement device.

[0035] The measuring assembly specifically includes a limiting barrel 2 and a floating prism rod 5. Among them, the bottom of the limiting barrel 2 is in a hollow state, and when the immersed tube 1 is located in the storage area, water can enter the limiting barrel 2; a connecting plate 3 is provided at the top of the limiting barrel 2, and one end of the connecting plate 3 away from the limiting barrel 2 is connected to the top of the immersed tube 1, so that the limiting barrel 2 is vertically suspended outside the immersed tube 1. A first prism 4 is provided at one end of the connecting plate 3 close to the top of the immersed tube 1; it can be understood that the center of the first prism 4 is higher than the top of the immersed tube 1. The floating prism rod 5 is vertically inserted into the limiting barrel 2 and can reciprocate vertically. A second prism 6 is provided at the top of the floating prism rod 5; during the vertical movement of the floating prism rod 5, the second prism 6 always protrudes above the top of the limiting barrel 2. The floating prism rod 5 can float to the water surface as a whole; it can be understood that when the immersed tube 1 is located in the storage area, the upper part of the immersed tube 1 floats on the water surface, and the height of the top of the immersed tube 1 exposed above the water surface is the freeboard of the immersed tube 1; and at this time, the floating prism rod 5 floats to the water surface as a whole, so the bottom surface of the floating prism rod 5 is flush with the water surface height, that is to say, the height difference between the top of the immersed tube 1 and the bottom surface of the floating prism rod 5 is equal to the freeboard of the immersed tube 1.

[0036] The elevation measuring device is erected on the shore near the storage area of the immersed tube 1. A forced centering pier is buried in the stable area of the shore geological structure, and the elevation measuring device is erected on the forced centering pier to collect the elevation data of the first prism 4 and the second prism 6 in real time and upload it to the server.

[0037] The server reads the elevation data of the first prism 4 and the second prism 6 in real time and records it in the server. A calculation module is provided in the server. The calculation module calculates the real-time freeboard of the immersed tube 1 in real time according to the elevation data of the first prism 4 and the second prism 6 and stores the calculation result in the server in real time, so that technicians can retrieve and view the freeboard monitoring data of the immersed tube 1 in the storage area at any time.

[0038] In the above-mentioned exemplary embodiment, through the combined application of the measuring assembly, the elevation measuring device and the server, the problems in the prior art such as high risk of manual measurement with a steel tape near water, low measurement accuracy, and inability to monitor the freeboard of the immersed tube in real time are solved. It can realize the real-time automatic monitoring of the freeboard of the immersed tube in the storage area, significantly improve the measurement accuracy, and there is no need for on-site manual measurement of the freeboard, significantly reducing the measurement risk.

[0039] Reference Figure 1As shown, in some embodiments, the floating prism rod 5 includes a strip-shaped carbon rod 51 and a plastic hollow sphere 52 connected to the bottom end of the strip-shaped carbon rod 51. The second prism 6 is installed at the top end of the strip-shaped carbon rod 51. The center of the plastic hollow sphere 52 is located on the central axis of the strip-shaped carbon rod 51. It can be understood that the strip-shaped carbon rod 51 has the advantages of high strength, light weight, and corrosion resistance, and the plastic hollow sphere 52 has the advantages of light weight and large buoyancy. Thus, the lightweight design of the floating prism rod 5 is achieved, and it is ensured that when the immersed tube 1 is located in the storage area, the floating prism rod 5 can float to the water surface as a whole.

[0040] Reference Figure 2 As shown, in some embodiments, a limiting opening 22 is provided at the center of the top of the limiting barrel 2; specifically, a support plate 21 is provided inside the barrel opening at the top of the barrel, and the limiting opening 22 is opened on the support plate 21. The strip-shaped carbon rod 51 of the floating prism rod 5 passes through the limiting opening 22, and the shape and size of the limiting opening 22 match the cross-sectional shape and size of the strip-shaped carbon rod 51; the sphere diameter of the plastic hollow sphere 52 is adapted to the inner diameter of the limiting barrel 2. It can be understood that the floating prism rod 5 will not detach from the limiting barrel 2 during the vertical movement process. In this illustrative embodiment, the mutual cooperation between the floating prism rod 5 and the limiting barrel 2 is realized, ensuring that the floating prism rod 5 can accurately move vertically and will not deviate in angle during the movement, that is, ensuring that the second prism 6 accurately moves vertically, thereby improving the measurement accuracy.

[0041] In some embodiments, the cross-sectional shape of the strip-shaped carbon rod 51 is any one of a rectangle, a triangle, and a trapezoid, and can also be a non-circular shape such as a polygon or a special shape. Correspondingly, the shape of the limiting opening 22 on the limiting barrel 2 matches the cross-sectional shape of the strip-shaped carbon rod 51. In this illustrative embodiment, the anti-rotation setting between the floating prism rod 5 and the limiting barrel 2 is realized, ensuring that the floating prism rod 5 will not rotate self, that is, ensuring that the orientation of the second prism 6 remains unchanged, and improving the reliability of the elevation measurement result.

[0042] In some embodiments, the elevation measurement device includes two surveying robots, which are respectively mounted on two forced centering piers buried on the shore to respectively collect the elevation data of the first prism 4 and the second prism 6 in real time and upload the data to the server in real time. In this illustrative embodiment, through the application of the surveying robots, the measurement accuracy can be significantly improved.

[0043] Reference Figures 1-3 As shown, the present invention also provides a method for monitoring the freeboard of an immersed tube, which is used to monitor the real-time freeboard of the immersed tube 1 in the storage area in real time. It is carried out by using the aforementioned immersed tube freeboard monitoring system and includes the following steps:

[0044] In the dry dock area, install the measurement assembly on the immersed tube 1, and make the height difference between the bottom of the limit barrel 2 and the top of the immersed tube 1 greater than the preset freeboard value of the immersed tube 1 in the storage area. It can be understood that the purpose is to enable the floating prism rod 5 to float on the water together with the immersed tube 1 in the future; measure the length L from the bottom surface of the floating prism rod 5 to the center of the second prism 6, and measure the height difference ΔH from the center of the first prism 4 to the top of the immersed tube 1.

[0045] On the shore of the storage area, set up the elevation measurement device and aim at the first prism 4 and the second prism 6.

[0046] Float and move the immersed tube 1 to the storage area by winching. The elevation measurement device collects the elevation H1 of the first prism 4 and the elevation H2 of the second prism 6 in real time and uploads them to the server in real time; the calculation module of the server calculates the real-time freeboard F of the immersed tube 1 in real time, and its calculation formula is as follows:

[0047] F = L - (H2 - H1 - ΔH).

[0048] The above-mentioned schematic embodiments can automatically monitor the real-time freeboard of the immersed tube 1 in the storage area, and have high measurement accuracy and low measurement risk; in addition, the immersed tube freeboard monitoring method of this embodiment is not affected by the external environment, can continuously monitor the freeboard of the immersed tube 1 for 24 hours, and makes the monitoring results more timely and traceable.

[0049] In some of the embodiments, in the dry dock area, two sets of measurement assemblies are symmetrically installed on the left and right sides of the front end of the immersed tube 1, and two other sets of measurement assemblies are symmetrically installed on the left and right sides of the rear end of the immersed tube 1; on the shore of the storage area, four sets of elevation measurement devices corresponding to the four sets of measurement assemblies are set up; the calculation module of the server calculates the real-time freeboard F1 at the left side of the front end of the immersed tube 1, the real-time freeboard F2 at the right side of the front end of the immersed tube 1, the real-time freeboard F3 at the left side of the rear end of the immersed tube 1, and the real-time freeboard F4 at the right side of the rear end of the immersed tube 1. This schematic embodiment realizes the real-time automatic monitoring of the freeboard at the four corners of the immersed tube 1 in the storage area, and can thus more timely and comprehensively understand the storage state of the immersed tube 1.

[0050] In summary, the immersed tube freeboard monitoring system and monitoring method of the present invention solve the problems such as large operation risk and low measurement accuracy existing in the prior art of manually holding a steel ruler to measure the freeboard of the immersed tube near water, realize the real-time automatic monitoring of the freeboard of the immersed tube in the storage area, and significantly improve the measurement accuracy and reduce the measurement risk.

[0051] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and the key points of each embodiment are the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the specific implementation manners of the present invention or make equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A sunken pipe freeboard monitoring system, characterized in that, Comprising: A measuring assembly, arranged on the side of the immersed tube, and specifically, the measuring assembly includes: A limiting barrel, with a hollow bottom and a connecting plate provided at the top of the barrel. One end of the connecting plate away from the limiting barrel is connected to the top of the tube of the immersed tube, so that the limiting barrel is vertically suspended outside the immersed tube; a first prism is provided at one end of the connecting plate close to the top of the tube of the immersed tube. A floating prism rod, vertically inserted into the limiting barrel and capable of reciprocating movement along the vertical direction; a second prism is provided at the top of the floating prism rod, and the second prism always protrudes above the top of the limiting barrel; the floating prism rod can float to the water surface as a whole. An elevation measuring device, erected on the shore, for collecting the elevation data of the first prism and the second prism in real time. A server, communicatively connected to the elevation measuring device to read the elevation data of the first prism and the second prism in real time; a calculation module is provided in the server to calculate the real-time freeboard of the immersed tube in real time according to the elevation data of the first prism and the second prism.

2. The immersed tube freeboard monitoring system according to claim 1, characterized in that The floating prism rod includes a strip-shaped carbon rod and a plastic hollow ball connected to the bottom end of the strip-shaped carbon rod, and the second prism is installed at the top of the strip-shaped carbon rod; the center of the plastic hollow ball is located on the central axis of the strip-shaped carbon rod.

3. The immersed tube freeboard monitoring system according to claim 2, wherein A limiting opening is provided at the center of the top of the limiting barrel, and the strip-shaped carbon rod passes through the limiting opening. The shape and size of the limiting opening match the cross-sectional shape and size of the strip-shaped carbon rod; the diameter of the plastic hollow ball is adapted to the inner diameter of the limiting barrel.

4. The immersed tube freeboard monitoring system according to claim 3, wherein, The cross-sectional shape of the strip-shaped carbon rod is any one of a rectangle, a triangle, and a trapezoid.

5. The immersed tube freeboard monitoring system according to claim 1, wherein, The elevation measuring device includes two measuring robots, and the two measuring robots are respectively erected on two forced centering piers buried on the shore to respectively collect the elevation data of the first prism and the second prism in real time and upload the data to the server in real time.

6. A method for monitoring the freeboard of immersed tubes, which is used to monitor the real-time freeboard of immersed tubes in the storage area in real time, is characterized in that, Adopting the immersed tube freeboard monitoring system according to any one of claims 1-5, including the following steps: In the dry dock area, install the measuring assembly on the immersed tube, and make the height difference between the bottom of the limiting barrel and the top of the tube of the immersed tube greater than the preset freeboard value of the immersed tube in the storage area; measure the length L from the bottom surface of the floating prism rod to the center of the second prism, and measure the height difference △H from the center of the first prism to the top of the tube of the immersed tube. On the shore of the storage area, erect the elevation measuring device and aim at the first prism and the second prism. Float and winch the immersed tube to the storage area. The elevation measuring device collects the elevation H1 of the first prism and the elevation H2 of the second prism in real time and uploads them to the server in real time; the calculation module calculates the real-time freeboard F of the immersed tube in real time, and its calculation formula is as follows: F = L - (H2 - H1 - △H).

7. According to the immersed tube freeboard monitoring method described in claim 6, characterized in that In the dry dock area, symmetrically install two groups of the measuring assemblies on the left and right sides of the front end of the immersed tube, and symmetrically install two other groups of the measuring assemblies on the left and right sides of the rear end of the immersed tube. On the shore of the storage area, four sets of the elevation measurement devices are installed corresponding to the four groups of the measurement components one by one; The calculation module calculates in real time the real-time freeboard F1 at the left side of the front end of the immersed tube, the real-time freeboard F2 at the right side of the front end of the immersed tube, the real-time freeboard F3 at the left side of the rear end of the immersed tube, and the real-time freeboard F4 at the right side of the rear end of the immersed tube.

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