Earth and rockfill dam core wall deformation monitoring and early warning system under freezing and thawing cycle

Abstract

The invention discloses an earth and rockfill dam core wall deformation monitoring and early warning system under freeze-thaw cycle. The monitoring and early warning system comprises the following operation steps that 1, a deformation monitoring sensor and seepage monitoring equipment are embedded in an earth and rockfill dam core wall; secondly, a data transmission device is embedded in the earth and rockfill dam core wall, and the data transmission device is connected with the first data sensor and the second data sensor in the first step; 3, processing the data transmitted by the data sensor I and the data sensor II based on the information processing module; and step 4, a hierarchical early warning mechanism is adopted based on the comprehensive evaluation model in the step 3, the hierarchical early warning mechanism comprises first-level early warning, second-level early warning and third-level early warning, and the first-level early warning, the second-level early warning and the third-level early warning are electrically connected with a visual platform which is used for displaying a deformation cloud picture and a historical curve in real time. Compared with the prior art, the system has the advantages that deformation of the earth and rockfill dam core wall can be monitored, early warning can be conducted, and therefore the system is safer and more practical.

Description

Technical Field

[0001] The present invention relates to the field of deformation monitoring and early warning of the core wall of earth-rock dams, specifically to a deformation monitoring and early warning system for the core wall of earth-rock dams under freeze-thaw cycles. Background Art

[0002] For existing dam monitoring systems, due to problems such as uneven distribution of monitoring points, missing monitoring data, discontinuous data, acquisition of initial values and data correction, as well as poor accuracy of prediction and forecasting models, it is also difficult to reasonably evaluate and predict the long-term performance and safety of high-core-wall rockfill dams through single and closed dam monitoring data. Generally speaking, there are mainly three ideas for the current deformation monitoring and prediction technology of high-core-wall earth-rock dams: one is to increase new environmental quantity factors during the construction and impoundment stages based on conventional statistical regression models to simulate special working conditions, thereby improving the model fitting accuracy and prediction accuracy; the second is to correct model parameters through parameter back-analysis based on measured data, then recalculate through feedback analysis, and use the calculation results for analysis and prediction, which can achieve good results in some projects; the third is to use means such as neural networks, genetic algorithms, and machine learning based on big data to conduct model and prediction, and certain progress has been made, but the physical interpretation of the obtained models is poor. The above several ideas are highly dependent on the collection and analysis of measured data. Therefore, on the one hand, it is necessary to increase the research efforts on monitoring and prediction models and methods; on the other hand, how to improve the availability and reliability of monitoring data, which can provide basic data support for the development of credible and effective monitoring, analysis, and forecasting models, is an urgent problem to be solved currently. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the above technical defects.

[0004] To solve the above problems, the technical solution of the present invention is: a deformation monitoring and early warning system for the core wall of earth-rock dams under freeze-thaw cycles, and the monitoring and early warning system includes the following operating steps:

[0005] Step 1: Embed deformation monitoring sensors and seepage monitoring equipment in the core wall of the earth-rock dam;

[0006] The deformation monitoring sensors include inclinometers, settlement gauges, data sensor 1, and surface displacement monitors, and the seepage monitoring equipment includes piezometers, seepage flow meters, and data sensor 2. The inclinometers, settlement gauges, and surface displacement monitors are electrically connected to data sensor 1, and data sensor 2 is electrically connected to the piezometers and seepage flow meters.

[0007] Step 2: Embed a data transmission device into the core wall of the earth-rock dam. The data transmission device is connected to the data sensors I and II in Step 1. The data sensors I and II use wireless transmission and are connected with information receivers. An information processing module is electrically connected to the information receivers.

[0008] Step 3: Process the data transmitted by the data sensors I and II based on the above information processing module, including noise elimination, deformation trend analysis, and multi-source data fusion. The deformation trend analysis uses a time series model to predict the displacement trend. The multi-source data fusion integrates deformation, seepage, and environmental (rainfall, water level) data to construct a comprehensive evaluation model.

[0009] Step 4: Adopt a hierarchical early warning mechanism based on the comprehensive evaluation model in Step 3, including primary early warning, secondary early warning, and tertiary early warning. Visualization platforms are electrically connected to the primary early warning, secondary early warning, and tertiary early warning for real-time display of deformation cloud maps and historical curves.

[0010] Further, an inclinometer is used to monitor the internal horizontal displacement of the core wall of the dam, and a borehole inclinometer is selected. A settlement gauge is used to measure the vertical settlement, and a static level is adopted.

[0011] Further, a piezometer is used to monitor the pore water pressure inside the core wall to judge the seepage stability, and a seepage flowmeter is used to monitor the change of seepage flow rate.

[0012] The advantages of the present invention compared with the existing technologies are as follows:

[0013] The present invention sets up deformation monitoring sensors and seepage monitoring equipment, uses the data transmission device to transmit the data measured by the data sensors I and II to the data for processing, and then uses a hierarchical early warning mechanism for early warning. Description of the Drawings

[0014] Figure 1 is a flowchart of the deformation monitoring and early warning system for the core wall of the earth-rock dam under freeze-thaw cycles of the present invention. Detailed Embodiments

[0015] The following further describes the detailed embodiments of the present invention with reference to the drawings. The same components are denoted by the same reference numerals.

[0016] It should be noted that the terms "front", "rear", "left", "right", "upper", and "lower" used in the following description refer to the directions in the drawings, and the terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0017] In order to make the content of the present invention more clearly understood, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention.

[0018] Embodiment 1: As Figure 1 shown, a deformation monitoring and early warning system for the core wall of an earth-rock dam under freeze-thaw cycles, the monitoring and early warning system includes the following operating steps:

[0019] Step 1: Embed deformation monitoring sensors and seepage monitoring equipment in the core wall of the earth-rock dam;

[0020] The deformation monitoring sensors include inclinometers, settlement gauges, data sensor 1, and surface displacement monitors. The seepage monitoring equipment includes piezometers, seepage flow meters, and data sensor 2. The inclinometers, settlement gauges, and surface displacement monitors are electrically connected to data sensor 1, and data sensor 2 is electrically connected to the piezometers and seepage flow meters. The inclinometer is used to monitor the internal horizontal displacement of the dam core wall, and a borehole inclinometer is selected. The settlement gauge is used to measure the vertical settlement, and a static level is adopted. The piezometer is used to monitor the pore water pressure inside the core wall to judge the seepage stability, and the seepage flow meter is used to monitor the change of seepage flow rate.

[0021] Step 2: Embed a data transmission device in the core wall of the earth-rock dam. The data transmission device is connected to data sensor 1 and data sensor 2 in Step 1. Data sensor 1 and data sensor 2 use wireless transmission, and an information receiver is connected thereto. An information processing module is electrically connected to the information receiver;

[0022] Step 3: Process the data transmitted by data sensor 1 and data sensor 2 based on the above information processing module, including removing noise, analyzing the deformation trend, and fusing multi-source data. The deformation trend analysis uses a time series model to predict the displacement trend. The multi-source data fusion integrates deformation, seepage, and environmental (rainfall, water level) data to construct a comprehensive evaluation model;

[0023] Step 4: Adopt a hierarchical early warning mechanism based on the comprehensive evaluation model in Step 3 above, including a first-level early warning, a second-level early warning, and a third-level early warning. A visualization platform is electrically connected to the first-level early warning, the second-level early warning, and the third-level early warning for real-time display of deformation cloud maps and historical curves.

[0024] The above describes the present invention and its embodiments. Such a description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural forms and embodiments to this technical solution without creative work without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. The core wall deformation monitoring and early warning system of earth-rock dam under freeze-thaw cycles is characterized by: The monitoring and early warning system includes the following operating steps: Step 1: embed deformation monitoring sensors and seepage monitoring equipment in the core wall of the earth-rock dam; The deformation monitoring sensor includes an inclinometer, a settlement meter, a data sensor 1 and a surface displacement monitor, and the seepage monitoring equipment includes an osmometer, a seepage flow meter and a data sensor 2. The inclinometer, the settlement meter and the surface displacement monitor are electrically connected to the data sensor 1, and the data sensor 2 is electrically connected to the osmometer and the seepage flow meter; Step 2: embed a data transmission device in the core wall of the earth-rock dam, and connect the data transmission device to the data sensor 1 and the data sensor 2 in step 1. The data sensor 1 and the data sensor 2 adopt wireless transmission, and are connected with an information receiver, and the information receiver is electrically connected with an information processing module; Step 3: Based on the above information processing module, the data transmitted by the data sensor 1 and the data sensor 2 are processed, including noise removal, deformation trend analysis and multi-source data fusion. The deformation trend analysis adopts a time series model to predict the displacement trend. The multi-source data fusion integrates deformation, seepage, and environmental (rainfall, water level) data to build a comprehensive evaluation model. Step 4: Based on the comprehensive evaluation model in the above step 3, a hierarchical warning mechanism is adopted, which includes level 1 warning, level 2 warning and level 3 warning. The level 1 warning, level 2 warning and level 3 warning are electrically connected to a visualization platform for real-time display of deformation cloud maps and historical curves.

2. The system for monitoring and early warning the deformation of the core wall of an earth-rock dam under freeze-thaw cycles according to claim 1 is characterized in that: The inclinometer is used to monitor the horizontal displacement inside the dam core wall, and a borehole inclinometer is selected. The settlement meter is used to measure the vertical settlement, and a static level is adopted.

3. The system for monitoring and early warning the deformation of the core wall of an earth-rock dam under freeze-thaw cycles according to claim 1 is characterized in that: The piezometer is used to monitor the pore water pressure inside the core wall and determine the seepage stability, and the seepage flowmeter is used to monitor the seepage flow change.

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