A method and device for measuring vertical displacement of roadbed based on connected container weighing method

Abstract

The application provides a subgrade vertical displacement measurement method and device based on a communicating vessel weighing method. The method comprises the following steps: horizontally drilling a horizontal hole in a subgrade or rock mass; during measurement, each communicating vessel is arranged in pairs with a communicating vessel at a neighboring detection point; the two ends of the communicating vessel are both provided with mass sensors; a certain amount of liquid is injected into the communicating vessel, and readings of the two mass sensors are read after the liquid surface is stable; or a communicating vessel that is already filled with a certain amount of liquid is used, and readings of the two mass sensors are read after the liquid surface is stable; and the subgrade vertical displacement is calculated according to the readings of the two mass sensors. The subgrade vertical displacement measurement method has the advantages of high efficiency, simple operation, high detection precision, low cost, and can be applied to the measurement of the upward arching or sinking of a railway subgrade hole, and the instrument used in the method is convenient to carry and easy to use, and can be applied to some holes with complex environments.

Description

Technical Field

[0001] This invention relates to the field of roadbed camber / sinking measurement, specifically to a method and apparatus for measuring the vertical displacement of roadbed based on the weighing method of communicating vessels. Background Technology

[0002] Currently, roadbed camber has been a persistent problem in transportation engineering construction. High-speed railways operate at high speeds, demanding high track smoothness and thus requiring more stringent control over roadbed deformation. Therefore, it is essential to develop a method for measuring the vertical displacement of the roadbed to determine its camber / settlement. Existing methods measure roadbed camber by placing measuring devices into horizontal holes in the roadbed; however, these methods face the following difficulties:

[0003] (1) The horizontal holes in the roadbed are too small (diameter <20cm) to conduct comprehensive testing.

[0004] (2) The horizontal holes in the roadbed are deep (depth > 100m), and large external measuring instruments cannot penetrate them.

[0005] (3) The camber of the roadbed is not large (10-20mm), and the measurement accuracy is required to be high.

[0006] (4) The environment inside the horizontal holes of the roadbed is complex (high humidity, etc.), making it difficult to directly measure the elevation difference. Summary of the Invention

[0007] In order to overcome the defects in the prior art, the purpose of this invention is to provide a method and device for measuring the vertical displacement of roadbed based on the weighing method of communicating vessels.

[0008] To achieve the above-mentioned objectives of this invention, this invention provides a method for measuring the vertical displacement of a roadbed based on the weighing method of communicating vessels, comprising the following steps:

[0009] Horizontal holes are drilled in the roadbed or rock mass;

[0010] During measurement, one end of the communicating vessel is placed into the horizontal hole and arched / sunk to the point being measured, while the other end of the communicating vessel is flush with the roadbed. Mass sensors are installed at the bottom of both ends of the communicating vessel.

[0011] A fixed amount of liquid is injected into the communicating vessel, and after the liquid level stabilizes, the readings of the two mass sensors are taken; or a communicating vessel that is already filled with a fixed amount of liquid is used, and after the liquid level stabilizes, the readings of the two mass sensors are taken.

[0012] The vertical displacement of the roadbed is calculated based on the readings of the two mass sensors.

[0013] This method for measuring the vertical displacement of roadbeds is highly efficient, simple to operate, highly accurate, and low in cost. It can be applied to the measurement of arching / sinking of railway roadbed holes. Furthermore, the instruments used in this method are portable and easy to learn, and can be used in some related projects in remote, inaccessible areas. This method is also applicable to holes in complex environments.

[0014] The preferred scheme of the roadbed vertical displacement measurement method based on the communicating vessel weighing method is as follows: set N detection points and N-1 communicating vessels, where N is a positive integer. The first detection point is set at a stable point outside the horizontal hole, and the remaining N-1 detection points are scattered inside the horizontal hole.

[0015] One end of the nth communicating vessel is placed at the nth detection point, and the other end of the nth communicating vessel is placed at the (n+1)th detection point, where 0 <n<N;

[0016] A fixed amount of liquid is injected into each communicating vessel. After the liquid level stabilizes, the readings of the two mass sensors corresponding to each communicating vessel are read. Alternatively, a communicating vessel already containing a fixed amount of liquid is used. After the liquid level stabilizes, the readings of the two mass sensors are read. The relative vertical displacement between the two ends of each communicating vessel is calculated based on the readings of the two mass sensors corresponding to each communicating vessel, thus obtaining the relative vertical displacement between two adjacent detection points.

[0017] Using the first detection point as a reference point, the vertical displacement difference between the remaining N-1 detection points and the first detection point is calculated sequentially to obtain the vertical displacement of each measuring point in the horizontal hole.

[0018] This preferred approach further improves the accuracy of the measurement.

[0019] Preferably, the conduit connecting the two ends of the communicator is a flexible conduit or a retractable conduit.

[0020] Preferably, the liquid is a liquid with a density greater than that of water. A denser liquid yields a larger mass, thus converting a small height displacement into a considerable weight difference, resulting in a more accurate measurement of the roadbed's vertical displacement and improving measurement accuracy.

[0021] Preferably, the cross-sectional areas at both ends of the communicating vessel are the same, which simplifies the calculation.

[0022] The present invention also proposes a roadbed vertical displacement measuring device, comprising N detection points, one of which is set at a stable point outside a horizontal hole, and the remaining detection points are dispersedly arranged inside the horizontal hole;

[0023] It further includes N - 1 communicating vessels. One end of the nth communicating vessel is arranged at the nth detection point, and the other end of the nth communicating vessel is arranged at the (n + 1)th detection point, where 0 < n < N. Mass sensors are provided at the bottoms of both ends of each communicating vessel, and the mass sensors are communicatively connected to a data processing unit;

[0024] Detect the vertical displacement of the subgrade according to the above method for measuring the vertical displacement of the subgrade based on the communicating vessel weighing method; during detection, the data processing unit receives the mass information collected by each mass sensor and obtains the vertical displacement of the subgrade according to the above method for measuring the vertical displacement of the subgrade based on the communicating vessel weighing method.

[0025] This device for measuring the vertical displacement of the subgrade has all the advantages of the above method for measuring the vertical displacement of the subgrade based on the communicating vessel weighing method.

[0026] Furthermore, a wireless communication module is provided at the bottom of the end of the communicating vessel. The mass sensor is connected to the wireless communication module, and the wireless communication module is wirelessly communicatively connected to the data processing unit.

[0027] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. Description of the Drawings

[0028] [[ID=十七]]The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0029] Figure 1 It is a schematic diagram of the liquid at both ends of the communicating vessel when the subgrade has a vertical displacement;

[0030] Figure 2 It is a schematic diagram of the liquid at both ends of the communicating vessel when the subgrade has no vertical displacement;

[0031] Figure 3 It is a schematic layout diagram of the communicating vessels when measuring the vertical displacement of the subgrade. Detailed Embodiment

[0032] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0033] In the description of this invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0034] This invention provides an embodiment of a method for measuring the vertical displacement of a roadbed based on the weighing method of communicating vessels. This embodiment specifically includes the following steps:

[0035] Horizontal holes are drilled horizontally in the roadbed or rock mass. These holes can be pre-drilled during the construction of the roadbed or later on the roadbed.

[0036] During measurement, one end of the communicating vessel is flush with the roadbed, and the other end is placed into the horizontal hole to arch / sink the measured point. Mass sensors are installed at the bottom of both ends of the communicating vessel.

[0037] A fixed amount of liquid is injected into the communicating vessel, and after the liquid level stabilizes, the readings of the two mass sensors are taken; or a communicating vessel that already contains a fixed amount of liquid is used, and after the liquid level stabilizes, the readings of the two mass sensors are taken.

[0038] The vertical displacement of the roadbed is calculated based on the readings of the two mass sensors.

[0039] Specifically, such as Figure 1 As shown, the communicating vessel used in this embodiment is a communicating vessel with the same cross-sectional area at both ends, and the conduit connecting the two ends of the communicating vessel is a flexible or telescopic conduit. After vertical displacement, the liquid level at the right end of the communicating vessel (the end placed at the measured point of the upper arch) drops. Assuming the drop height is h, it is the vertical displacement height of the roadbed. At this time, the liquid level at the left end of the communicating vessel is h1, and the liquid level at the right end of the communicating vessel is h2, then h1 = h + h2. Therefore, after vertical displacement, the liquid mass M1 at the left end of the communicating vessel is significantly different from the liquid mass M2 at the right end of the communicating vessel. When the vertical displacement is positive, M1 > M2; when the vertical displacement is negative, M1 > M2. <M2。

[0040] The vertical displacement height of the roadbed can be calculated using the following formula. Where ρ is the density of the injected liquid, and S is the cross-sectional area of ​​either end of the communicating vessel.

[0041] The mass of the liquid injected here can be determined beforehand outside the horizontal hole. Both ends of the communicating vessel are placed horizontally, then the liquid is injected, and the liquid surface remains level when stationary. Figure 2 As shown, at this point, the mass of liquid in both ends of the communicating vessel is equal.

[0042] To further improve the accuracy of the measurement, this application also proposes preferred embodiments of the above-described embodiments:

[0043] like Figure 3 As shown, N detection points and N-1 communicating vessels are set up, where N is a positive integer. The first detection point is set at a stable point outside the horizontal hole, and the remaining N-1 detection points are scattered inside the horizontal hole.

[0044] One end of the nth communicating vessel is placed at the nth detection point, and the other end of the nth communicating vessel is placed at the (n+1)th detection point, where 0 <n<N。

[0045] A fixed amount of liquid is injected into each communicating vessel. After the liquid level stabilizes, the readings of the two mass sensors corresponding to each communicating vessel are read. Alternatively, a communicating vessel already containing a fixed amount of liquid is used. After the liquid level stabilizes, the readings of the two mass sensors are read. The relative vertical displacement between the two ends of each communicating vessel is calculated based on the readings of the two mass sensors corresponding to each communicating vessel, thus obtaining the relative vertical displacement between two adjacent detection points.

[0046] The relative vertical displacement between two adjacent detection points is expressed by the above formula. That will be obtained immediately; I will not go into details here.

[0047] Using the first detection point as a reference point, the vertical displacement difference between the remaining N-1 detection points and the first detection point is calculated sequentially to obtain the vertical displacement of each measuring point in the horizontal hole.

[0048] Specifically, if the relative vertical displacement between the first and second detection points is h1, then the vertical displacement of the roadbed at the second detection point relative to the first detection point is also h1. If the relative vertical displacement between the second and third detection points is h2, then the vertical displacement of the roadbed at the third detection point relative to the first detection point is h1+h2. And so on, to obtain the vertical displacement of the roadbed at the Nth detection point relative to the first detection point, thus obtaining the vertical displacement of the roadbed at all detection points.

[0049] For ease of setup, the horizontal distance between each detection point is equal in this embodiment. To further improve the accuracy of the measurement, a liquid with a high density, such as mercury, is preferred but not limited to be used.

[0050] The present application also provides an embodiment of a device for measuring the vertical displacement of a roadbed. In this embodiment, the device for measuring the vertical displacement of the roadbed includes N detection points. One of the detection points is arranged at a stable point outside the horizontal hole, and the remaining detection points are arranged in a scattered manner within the horizontal hole. It also includes N - 1 communicating vessels. One end of the nth communicating vessel is arranged at the nth detection point, and the other end of the nth communicating vessel is arranged at the (n + 1)th detection point, where 0 < n < N. Mass sensors are provided at the bottoms of both ends of each communicating vessel, and the mass sensors are communicatively connected to a data processing unit. Specifically, a wireless communication module is provided at the bottom of the end of the communicating vessel, the mass sensor is connected to the wireless communication module, and the wireless communication module is wirelessly communicatively connected to the data processing unit. The data processing unit is preferably but not limited to a smart terminal, such as a mobile phone, a computer, etc.

[0051] The vertical displacement of the roadbed is detected according to the above-mentioned method for measuring the vertical displacement of the roadbed based on the weighing method of the communicating vessel. During the detection, the data processing unit receives the mass information collected by each mass sensor and obtains the vertical displacement of the roadbed according to the above-mentioned method for measuring the vertical displacement of the roadbed based on the weighing method of the communicating vessel.

[0052] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0053] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A method for measuring the vertical displacement of a roadbed based on the weighing method of communicating vessels, characterized in that, It includes the following steps: Horizontally open a horizontal hole in the subgrade or rock mass; Set N detection points and N - 1 communicating vessels, where N is a positive integer. Among them, the first detection point is set at a stable point outside the horizontal hole, and the remaining N - 1 detection points are arranged dispersedly in the horizontal hole; During measurement, one end of the nth communicating vessel is set on the nth detection point, and the other end of the nth communicating vessel is set on the (n + 1)th detection point, where 0 < n < N. Mass sensors are provided at the bottoms of both ends of the communicating vessel; Inject a fixed amount of liquid into each communicating vessel. After the liquid level stabilizes, read the readings of the two mass sensors corresponding to each communicating vessel; or use a communicating vessel that already contains a fixed amount of liquid. After the liquid level stabilizes, read the readings of the two mass sensors; Calculate the relative vertical displacement between both ends of each communicating vessel according to the readings of the two mass sensors corresponding to each communicating vessel, and obtain the relative vertical displacement between adjacent two detection points; Taking the first detection point as a reference point, calculate the vertical displacement differences between the remaining N - 1 detection points and the first detection point in turn, and obtain the vertical displacement amounts of each measurement point in the horizontal hole.

2. The method for measuring the vertical displacement of roadbed based on the weighing method of communicating vessels according to any one of claims 1, characterized in that, ​ 3. The method for measuring the vertical displacement of roadbed based on the weighing method of communicating vessels according to any one of claims 1, characterized in that, ​ 4. The method for measuring the vertical displacement of roadbed based on the weighing method of communicating vessels according to any one of claims 1, characterized in that, ​ 5. A device for measuring the vertical displacement of a roadbed, characterized in that, ​ ​ ​ 6. The roadbed vertical displacement measuring device according to claim 5, characterized in that, ​

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