Rock slope hidden danger cooperative control method based on early warning-prevention and control linkage

Abstract

The invention discloses a geotechnical slope hidden danger cooperative control method based on early warning-prevention and control linkage, and relates to the technical field of geological engineering. Compared with the previous comprehensive prevention and early warning conditions of rock-soil slope disasters, the method has the advantages that the problem of how to effectively improve the ability to deal with rock-soil slope accident disasters under the condition of considering the influence of economic factors is solved, and engineering mechanics, numerical simulation, physical models and engineering tests are comprehensively utilized; a rock and soil slope disaster intelligent monitoring-real-time feedback-dynamic evaluation-engineering regulation and control technology system with regulation and control opportunity, regulation and control parts, regulation and control modes and dynamic optimization as the core is established, and a disaster cooperative prevention and control technology with early warning-prevention and control linkage is provided. Linkage of early warning release and prevention and control means of the rock-soil side slope is achieved, accurate prevention and control of hidden danger of the rock-soil side slope can be achieved, and the disaster prevention and control cost is reduced on the premise that the safety of the side slope is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of geological engineering technology, and in particular to a method for collaboratively controlling hidden dangers of rock and soil slopes based on early warning-prevention and control linkage. Background Art

[0002] Due to the influence of global climate change and frequent extreme weather, the temporal and spatial randomness of rock and soil slope disasters is becoming increasingly high. When a slope disaster occurs, the application of prevention and control measures will directly affect the construction cost and utility ratio.

[0003] Disasters on rock and soil slopes usually cause a large number of casualties and property losses. How to prevent and control slope disasters safely and economically is one of the focuses of scholars' research. For natural rock and soil slopes such as highways and coastal slopes, the current slope engineering treatment methods include drainage, brushing, weight reduction, filling and pressing, setting up retaining walls, rock spraying, lattice anchoring, anti-slide piles, etc., and multiple treatment methods can also be used in combination. However, the existing slope disaster prevention and control methods are mostly routine prevention and control and global prevention and control, and are not closely linked to the early warning system. When there are safety hazards or disasters on the slope, the slope needs to be globally prevented and controlled, and the economic benefits are not high, and it is impossible to carry out precise treatment of hidden danger points.

[0004] In the research of geotechnical slope early warning technology, scholars mostly use early warning methods based on monitoring parameter thresholds, such as speed thresholds, acceleration thresholds, displacement thresholds, rainfall thresholds, etc. With the advancement and development of technology, many geotechnical slopes have established a variety of monitoring systems based on wireless sensor networks, the Internet of Things, can-bus and ZigBee technologies. The installation of various automatic monitoring equipment on the slopes has improved the monitoring efficiency and automation level. At the same time, some researchers have also carried out the design of slope monitoring and early warning systems based on computers, cloud computing, and GIS. However, the ultimate goal of early warning is to prevent the occurrence of slope disasters. At present, the existing early warning technologies and early warning systems are not closely related to slope disaster prevention and control, that is, the ultimate role of early warning cannot be reflected.

[0005] In order to solve the above problems, the present invention proposes a collaborative control method for rock and soil slope hazards based on early warning-prevention and control linkage. Summary of the invention

[0006] The purpose of the present invention is to propose a collaborative control method for rock and soil slope hazards based on early warning-prevention linkage to solve the problems raised in the background technology:

[0007] How to effectively improve the ability to respond to sudden geotechnical slope accidents and disasters while taking into account the influence of economic factors.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A collaborative control method for rock and soil slope hazards based on early warning-prevention linkage includes the following steps:

[0010] S1: Analyze potential risk points through the established geotechnical slope monitoring and early warning system and conduct long-term cyclic precise spatial and temporal positioning;

[0011] S2: Based on the early warning model of multi-source monitoring data, the early warning level of potential risk points is divided, and the optimal prevention and control strategy is adopted for engineering field application;

[0012] S3: Compare the changing characteristics of monitoring data and early warning data before and after the implementation of the optimal prevention and control strategy, evaluate the accuracy and effectiveness of the prevention and control effect of the optimal prevention and control strategy, and dynamically adjust the indicator parameters of different early warning levels;

[0013] S4: Comprehensively analyze the optimal construction cost and utility ratio of geotechnical slopes to perform economic optimization of the optimal prevention and control strategy.

[0014] Preferably, the warning level in S2 is determined based on a rainfall index, a soil moisture index and a displacement index.

[0015] Preferably, the warning levels include a blue warning stage, a cyan warning stage, a yellow warning stage, an orange warning stage, a red warning stage and a purple warning stage;

[0016] The blue warning stage is judged by the rainfall index and the soil moisture index. When the rainfall index or the soil moisture index is not within the normal range, a blue warning is issued;

[0017] The cyan warning stage is judged by the soil moisture index. When the soil moisture index is not within the normal range, a cyan warning is issued;

[0018] The yellow warning stage is judged by the displacement index, and when the displacement index is between the instrument error and the irreversible plastic deformation point, a yellow warning is issued;

[0019] The orange warning stage is judged by the displacement index. When the cumulative displacement is between the irreversible plastic deformation point and the through-sliding surface formation point, an orange warning is issued.

[0020] The red warning stage is judged by the soil moisture index and displacement index. When the soil moisture content is not within the normal range and the cumulative displacement change is between the irreversible plastic deformation point and the through-sliding surface formation point, a red warning is issued;

[0021] The purple warning stage is the highest warning level, which is judged by the displacement index. When the cumulative displacement is greater than the point where the sliding surface is formed, a purple warning is issued.

[0022] Preferably, the optimal prevention and control strategy described in S2 accurately locates the slope risk points based on the rock and soil slope monitoring and early warning system, analyzes the risks existing in the slope risk points, and implements new rock and soil slope prevention and control technologies according to different risk types and different risk points.

[0023] Preferably, the new rock and soil slope prevention and control technology includes coordinated prevention and control of slope seepage and barrier at risk points, geotextile fabric composite dry stacking at risk points or new soil unloading construction based on long spiral thin-walled cast-in-place piles.

[0024] Compared with the prior art, the present invention provides a method for collaboratively controlling rock and soil slope hazards based on early warning-prevention linkage, which has the following beneficial effects:

[0025] The present invention uses engineering mechanics, numerical simulation, physical models and engineering experiments to establish a rock and soil slope disaster intelligent monitoring-real-time feedback-dynamic evaluation-engineering control technology system with control timing, control location, control method and dynamic optimization as the core, and proposes a disaster coordinated prevention and control technology with early warning-prevention linkage. Realizing the linkage of rock and soil slope early warning release and prevention and control means can realize the precise prevention and control of rock and soil slope hidden dangers, and reduce the cost of disaster prevention and control while ensuring slope safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a flow chart of the method mentioned in Example 1 of the present invention;

[0027] Figure 2 This is a flow chart of the optimal prevention and control strategy for rock and soil slopes mentioned in Example 1 of the present invention;

[0028] Figure 3 This is a schematic diagram of the prevention and control effect evaluation model mentioned in Example 1 of the present invention. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] The present invention uses engineering mechanics, numerical simulation, physical models and engineering experiments to establish a technical system of intelligent monitoring-real-time feedback-dynamic evaluation-engineering regulation of rock and soil slope disasters with regulation timing, regulation location, regulation method and dynamic optimization as the core, and proposes a coordinated disaster prevention and control technology of early warning-prevention linkage. The linkage of early warning release and prevention and control measures for rock and soil slopes can achieve accurate prevention and control of hidden dangers in rock and soil slopes, and reduce the cost of disaster prevention and control while ensuring the safety of the slopes. Specifically include the following contents.

[0031] Embodiment 1:

[0032] See also Figure 1-3 The present invention provides a collaborative control method for rock and soil slope hidden dangers based on early warning-prevention linkage, comprising:

[0033] S1: Analyze potential risk points through the established geotechnical slope monitoring and early warning system and conduct long-term cyclic precise spatial and temporal positioning; the details are as follows:

[0034] The geotechnical slope monitoring and early warning system conducts long-term cyclic monitoring of geotechnical slopes, analyzes historical monitoring data of slopes and piled materials to obtain potential risk points, and obtains accurate spatial and temporal positioning of potential risk points.

[0035] S2: Based on the early warning model of multi-source monitoring data, the early warning level of potential risk points is divided, and the optimal prevention and control strategy is adopted for field engineering application; the details are as follows:

[0036] The early warning model based on multi-source monitoring data divides the geotechnical slope into different early warning levels. The judgment is made through three indicators: rainfall index, soil moisture index and displacement index. Among the displacement indicators, X1 is instrument error, X2 is irreversible plastic deformation point, and X3 is the point where the sliding surface is formed. It is changed according to the situation of each slope or the instrument used.

[0037] During the blue warning stage, the two main indicators for judgment are rainfall and soil moisture content. A blue warning is issued when the rainfall or soil moisture content is not within the normal range, and there is a low-risk hidden danger at this time.

[0038] In the green warning stage, the main judgment is based on the moisture content of the soil. When the indicator is not within the normal range, a green warning is issued. At this time, there is a medium-risk hazard and local slight deformation may occur.

[0039] In the yellow warning stage, the displacement index is used for judgment. When the displacement is between X1 and X2, a yellow warning is issued. At this time, there are medium-risk hazards, plastic deformation gradually occurs, and the sliding zone area increases. At the same time, the deformation rate of the sliding zone is all improved compared to the cyan warning stage.

[0040] In the orange warning stage, when the cumulative displacement is between X2 and X3, an orange warning is issued. At this warning level, the plastic deformation of the slope intensifies, and slight deformation or damage may occur locally. The deformation rate is significantly increased compared to the yellow warning stage.

[0041] In the red warning stage, when the soil moisture content is not within the normal range and the cumulative displacement change is between X2 and X3, a red warning is issued. At this warning level, large deformation or damage may occur locally.

[0042] Purple warning is the highest warning level of this warning model. When the cumulative displacement is greater than X3, a purple warning is issued, and the deformation rate is greatly increased compared to the red warning stage.

[0043] Reference Figure 2 , based on the intelligent geotechnical slope monitoring and early warning system with multi-source information, the historical monitoring data and piled materials of the slope are analyzed to accurately locate the risk points of the slope, analyze the risks of displacement or excessive seepage, excessive water content and other risks at the risk points of the slope, and carry out slope drainage or barrier disaster prevention and control, or coordinated prevention and control of drainage and barrier, to accurately control the occurrence of slope disasters according to the different risk types and risk points divided by the early warning model.

[0044] S3: Compare the changing characteristics of monitoring data and early warning data before and after the implementation of the optimal prevention and control strategy, evaluate the accuracy and effectiveness of the prevention and control effect of the optimal prevention and control strategy, and dynamically adjust the indicator parameters of different early warning levels; the details are as follows:

[0045] The various data characteristics after the implementation of the optimal prevention and control strategy can be obtained through the continuous monitoring data of the rock and soil slope monitoring and early warning system, and compared with the various data characteristics before the implementation of the optimal prevention and control strategy. For details, please refer to Figure 3 , based on data curves and data simulation, the accuracy and effectiveness of the implementation of the optimal prevention and control strategy can be improved. For situations with low accuracy or effectiveness, the indicator parameters in each warning level can be adjusted, such as the position of the irreversible plastic deformation points and the formation points of the through-sliding surface of different rock slopes in the displacement indicator, or the division values ​​of the normal range of rainfall and soil moisture content. By adjusting the above data, the warning level of the rock slope can be adjusted to improve the accuracy and effectiveness of the optimal prevention and control strategy.

[0046] S4: Comprehensively analyze the optimal construction cost and utility ratio of geotechnical slopes to optimize the economic performance of the optimal prevention and control strategy. The details are as follows:

[0047] Taking into account the construction cost and the optimal utility ratio, the optimal prevention and control strategy can be optimized and adjusted according to the relationship between the construction cost and the optimal utility ratio. It can solve the problem of safe operation of engineering slopes and stability of natural slopes.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A collaborative control method for rock and soil slope hazards based on early warning-prevention linkage, characterized in that: The steps include: S1: Analyze potential risk points through the established geotechnical slope monitoring and early warning system and conduct long-term cyclic precise spatial and temporal positioning; S2: Based on the early warning model of multi-source monitoring data, the early warning level of potential risk points is divided, and the optimal prevention and control strategy is adopted for engineering field application; S3: Compare the changing characteristics of monitoring data and early warning data before and after the implementation of the optimal prevention and control strategy, evaluate the accuracy and effectiveness of the prevention and control effect of the optimal prevention and control strategy, and dynamically adjust the indicator parameters of different early warning levels; S4: Comprehensively analyze the optimal construction cost and utility ratio of geotechnical slopes to perform economic optimization of the optimal prevention and control strategy.

2. The method for collaboratively controlling rock and soil slope hazards based on early warning-prevention linkage according to claim 1 is characterized in that: The warning level described in S2 is determined based on rainfall index, soil moisture index and displacement index.

3. The method for collaboratively controlling rock and soil slope hazards based on early warning-prevention linkage according to claim 2 is characterized in that: The warning levels include blue warning stage, cyan warning stage, yellow warning stage, orange warning stage, red warning stage and purple warning stage; The blue warning stage is judged by the rainfall index and the soil moisture index. When the rainfall index or the soil moisture index is not within the normal range, a blue warning is issued; The cyan warning stage is judged by the soil moisture index. When the soil moisture index is not within the normal range, a cyan warning is issued; The yellow warning stage is judged by the displacement index, and when the displacement index is between the instrument error and the irreversible plastic deformation point, a yellow warning is issued; The orange warning stage is judged by the displacement index. When the cumulative displacement is between the irreversible plastic deformation point and the through-sliding surface formation point, an orange warning is issued. The red warning stage is judged by the soil moisture index and displacement index. When the soil moisture content is not within the normal range and the cumulative displacement change is between the irreversible plastic deformation point and the through-sliding surface formation point, a red warning is issued; The purple warning stage is the highest warning level, which is judged by the displacement index. When the cumulative displacement is greater than the point where the sliding surface is formed, a purple warning is issued.

4. The method for collaboratively controlling rock and soil slope hazards based on early warning-prevention linkage according to claim 1 is characterized in that: The optimal prevention and control strategy described in S2 is based on the rock and soil slope monitoring and early warning system to accurately locate the slope risk points, analyze the risks existing at the slope risk points, and implement new rock and soil slope prevention and control technologies according to different risk types and different risk points.

5. The method for collaboratively controlling rock and soil slope hazards based on early warning-prevention linkage according to claim 4 is characterized in that: The new rock and soil slope prevention and control technology includes coordinated prevention and control of slope seepage and barrier at risk points, geotextile fabric composite dry stacking at risk points or new soil unloading construction based on long spiral thin-walled bored piles.

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