Method and system for judging sliding zone of side slope

Abstract

The invention relates to the technical field of geotechnical engineering, in particular to a side slope sliding zone judgment method and system.The side slope sliding zone judgment method comprises the steps that inclinometer holes are formed in the area where a side slope is located; carrying out multiple times of displacement detection on the intervals of the inclinometry holes by utilizing a mobile inclinometer to obtain hole depth-displacement curve information of the inclinometry holes; judging the sliding type of the slope according to the obtained hole depth-displacement curve information, and setting an area between two adjacent detection points in the inclinometry hole as a detection interval; according to the corresponding hole depth-displacement curve obtained by the first displacement monitoring and the corresponding hole depth-displacement curve obtained by the last displacement monitoring, the actual annual average horizontal slip value of the highest point of each detection interval relative to the lowest point is calculated; and judging whether a sliding zone exists in each detection interval or not according to the sliding type of the side slope and the obtained actual annual average horizontal sliding value.

Description

Technical Field

[0001] The invention relates to the technical field of geotechnical engineering, and in particular to a method and system for determining a sliding zone of a slope. Background Art

[0002] During the construction of high embankments, large landfills, reservoir dams and foundation pits, displacement of rock and soil below the surface usually occurs due to various factors. If this phenomenon continues for a long time without monitoring and control, it may induce serious landslides or collapse disasters on the slopes of the project area, resulting in significant casualties and economic losses.

[0003] In order to prevent the occurrence of disaster events, a large amount of engineering geological surveys, safety monitoring, disaster assessment and prevention work is usually required in the project area before and during the project. Among them, the determination of the position of the sliding zone of the slope is an important guarantee for the effectiveness of the above work.

[0004] Mobile inclinometers are one of the main means of monitoring and warning of displacement phenomena in deep underground rock and soil bodies in the prior art, and are widely used in determining the position of the sliding zone of the slope. However, due to the lack of a standardized sliding zone determination method, the prior art uses mobile inclinometers to determine the position of the sliding zone of the slope. In the process of analyzing and collating the inclinometer hole data, it is often difficult to accurately identify the sliding zone or seriously misjudge the sliding zone due to factors such as the complexity of the hole depth-displacement curves and the experience of the technicians. Summary of the invention

[0005] The present invention provides a method and system for determining the sliding zone of a slope, thereby solving the problem that due to the lack of a standardized sliding zone determination method, a mobile inclinometer is used in the prior art to determine the position of the sliding zone of a slope. In the process of analyzing and collating the data of the inclinometer hole, it is often difficult to accurately identify the sliding zone or seriously misjudge the sliding zone due to factors such as the complexity of the hole depth-displacement curves and the experience of the technicians.

[0006] The technical solution adopted by the present invention is:

[0007] A method for determining a sliding zone of a slope, comprising:

[0008] Arrange inclinometer holes in the area where the slope is located; use a mobile inclinometer to perform multiple displacement detections on the inclinometer holes to obtain hole depth-displacement curve information of the inclinometer holes, wherein the hole depth-displacement curve information includes corresponding hole depth-displacement curves obtained from each displacement monitoring;

[0009] The sliding type of the slope is judged according to the obtained hole depth-displacement curve information. If, relative to the first displacement monitoring, the horizontal displacement values ​​of each detection point toward the outside of the slope in each subsequent displacement monitoring are all positive numbers, and all gradually increase with the passage of time, then the sliding type of the slope is judged to be a landslide type; if, relative to the first displacement monitoring, the horizontal displacement values ​​of each detection point toward the outside of the slope in each subsequent displacement monitoring are all negative numbers, and all gradually decrease with the passage of time, then the sliding type of the slope is judged to be a collapse type;

[0010] Setting the area between two adjacent detection points in the inclinometer hole as a detection interval;

[0011] The actual annual average horizontal slip value of the highest point relative to the lowest point in each detection interval is calculated based on the corresponding hole depth-displacement curve obtained from the first displacement monitoring and the corresponding hole depth-displacement curve obtained from the last displacement monitoring;

[0012] According to the sliding type of the slope and the obtained actual annual average horizontal slip values, it is determined whether there is a sliding zone in each of the detection intervals.

[0013] The above technical scheme determines whether there is a sliding zone in each detection interval by determining the sliding type of the slope and the actual average annual horizontal slip value of the highest point of each detection interval relative to the lowest point, and provides a marked and standardized determination method for determining the position of the sliding zone. The operation method of the technical scheme is simple and easy, and does not incur additional costs. It has the advantages of strong operability, high recognition and high reliability. It solves the problem that due to the lack of a standardized sliding zone determination method, a mobile inclinometer is used in the prior art to determine the position of the sliding zone of the slope. In the process of analyzing and collating the inclinometer hole data, it is often encountered that the sliding zone is difficult to accurately identify or the sliding zone is seriously misjudged due to factors such as the complex and diverse hole depth-displacement curves and the experience of technical personnel. It has wide applicability and promotion prospects, and can be actively used in geological disaster control projects, road and bridge traffic projects, deep foundation pit projects, reservoir dam safety monitoring and other fields to better achieve disaster prevention and mitigation goals.

[0014] Further, according to the sliding type of the slope and the obtained actual average annual horizontal slip values, it is preliminarily determined whether there is a sliding zone in each detection interval, and the number of detection intervals preliminarily determined to have sliding zones in all detection intervals is counted, which is recorded as a first number;

[0015] In the process of arranging inclinometer holes in the area where the slope is located, obtaining groundwater level information, core information and in-hole video information of the inclinometer holes;

[0016] If the first number is not less than a preset number, evaluating multiple determination indicators of each detection interval preliminarily determined to have a sliding zone according to the groundwater level information, the core information and the in-hole video information; verifying whether each detection interval preliminarily determined to have a sliding zone has a sliding zone according to the evaluation results of each determination indicator;

[0017] The multiple determination indicators include two indicators: integrity and groundwater level.

[0018] In the actual engineering execution process, simply referring to the displacement detection data, sometimes multiple sliding zones are determined on the slope. When too many sliding zones are determined, it often means that there may be misjudgments in the determination of some of these sliding zones. In the process of arranging the inclinometer holes, the groundwater level information, core information and in-hole video information of the inclinometer holes are obtained; multiple judgment indicators of each detection interval preliminarily determined to have a sliding zone are evaluated; and then, based on the evaluation results of each judgment indicator, whether there is a sliding zone in each detection interval preliminarily determined to have a sliding zone is verified; thereby avoiding the occurrence of misjudgments to the greatest extent; ensuring the accuracy of the judgment on whether there is a sliding zone in each detection interval.

[0019] In the process of arranging inclinometer holes, the groundwater level information, core information and in-hole video information of the inclinometer holes are obtained; the multi-professional data results such as drilling, geophysical exploration, geology and monitoring are fully utilized, and the above data results are combined with displacement detection data, which can most directly and reliably reflect and reveal the deep underground displacement information, which can not only make full use of the results of the preliminary investigation and monitoring of the project, but also save the cost investment of the investigation and monitoring that may be added in the later stage, greatly improve the quality of related technical achievements, and help save the total investment of the project.

[0020] Furthermore, the preset number ranges from 2 to 5.

[0021] Furthermore, the preset number is 2.

[0022] Furthermore, according to the evaluation results of various determination indicators, the method for verifying whether there is a sliding band in each detection interval preliminarily determined to have a sliding band includes:

[0023] If the evaluation result of any one of the multiple judgment indicators of any detection interval preliminarily determined to have a sliding band is unqualified, then the detection interval preliminarily determined to have a sliding band is verified to have a sliding band; if the evaluation results of all the multiple judgment indicators of any detection interval preliminarily determined to have a sliding band are qualified, then the detection interval preliminarily determined to have a sliding band is verified to have no sliding band.

[0024] Furthermore, the method for evaluating the integrity of any detection interval where a sliding zone is preliminarily determined to exist includes:

[0025] According to the core information and the in-hole video information, determine whether there are weak rock layers and / or bedrock-covering layer interfaces in the detection interval where the sliding zone is preliminarily determined to exist. If it is determined that there are weak rock layers and / or bedrock-covering layer interfaces in the detection interval where the sliding zone is preliminarily determined to exist, then the evaluation result of the indicator integrity of the detection interval where the sliding zone is preliminarily determined to exist is unqualified; if it is determined that there are no weak rock layers and no bedrock-covering layer interfaces in the detection interval where the sliding zone is preliminarily determined to exist, then the evaluation result of the indicator integrity of the detection interval where the sliding zone is preliminarily determined to exist is qualified.

[0026] In another technical solution, in the process of arranging inclinometer holes in the area where the slope is located, the rock mass acoustic wave velocity information of the inclinometer holes is also obtained;

[0027] The method for evaluating the integrity of any detection interval where a sliding zone is preliminarily determined to exist comprises: making two judgments based on the core information, the in-hole video information and the rock mass acoustic wave velocity information;

[0028] One of the judgments is: judging whether there is a weak rock layer and / or a bedrock-cover layer interface in the detection interval where the sliding zone is preliminarily determined to exist, based on the core information and the in-hole video information;

[0029] Another judgment is: judging, based on the rock mass acoustic wave velocity information, whether the maximum difference between the average value of the rock mass acoustic wave velocity in the detection interval where the sliding zone is preliminarily determined to exist and the average value of the rock mass acoustic wave velocity in the adjacent detection interval is greater than a preset difference;

[0030] If it is determined that there is no weak rock layer and no bedrock-covering layer interface in the detection interval where the sliding zone is preliminarily determined to exist, and if it is determined that the maximum difference is not greater than the preset difference, then the evaluation result of the integrity of the detection interval where the sliding zone is preliminarily determined to exist is qualified; otherwise, the evaluation result is unqualified.

[0031] By setting the rock mass acoustic wave velocity information of the inclinometer holes obtained during the arrangement of the inclinometer holes as the evaluation basis for evaluating the integrity of the detection interval for preliminarily determining the existence of a sliding zone, the accuracy of the judgment on whether there is a sliding zone in each detection interval can be further guaranteed.

[0032] Furthermore, the preset difference value ranges from 1500 m / s to 2500 m / s.

[0033] Furthermore, the preset difference is 2000 m / s.

[0034] Furthermore, the method for evaluating the groundwater level indicator of any detection interval where the sliding zone is preliminarily determined to exist includes:

[0035] It is determined according to the groundwater level information whether the elevation of the groundwater level at the inclinometer hole is within the elevation range of the detection interval for the preliminary determination of the existence of a sliding zone; if it is determined that the elevation of the groundwater level at the inclinometer hole is within the elevation range of the detection interval for the preliminary determination of the existence of a sliding zone, then the evaluation result of the groundwater level indicator in the detection interval for the preliminary determination of the existence of a sliding zone is unqualified; if it is determined that the elevation of the groundwater level at the inclinometer hole is outside the elevation range of the detection interval for the preliminary determination of the existence of a sliding zone, then the evaluation result of the groundwater level indicator in the detection interval for the preliminary determination of the existence of a sliding zone is qualified.

[0036] Furthermore, the actual annual average horizontal slip value of the highest point relative to the lowest point in any detection interval is calculated using the following formula:

[0037]

[0038] Among them, V is the actual average annual horizontal slip value of the highest point of the detection interval relative to the lowest point; S1 is the horizontal displacement value of the highest point of the detection interval to the outside of the slope measured in the last displacement monitoring; S2 is the horizontal displacement value of the highest point of the detection interval to the outside of the slope measured in the first displacement monitoring; S3 is the horizontal displacement value of the lowest point of the detection interval to the outside of the slope measured in the last displacement monitoring; S4 is the horizontal displacement value of the lowest point of the detection interval to the outside of the slope measured in the first displacement monitoring; T1 is the time of the last displacement monitoring; T2 is the time of the first displacement monitoring.

[0039] Furthermore, according to the sliding type of the slope and the obtained actual annual average horizontal slip values, the method for determining whether there is a sliding zone in each detection interval includes:

[0040] When determining that the sliding type of the slope is a landslide type, if the actual annual average horizontal slip value of the highest point relative to the lowest point of a certain detection interval is not less than the first preset annual average horizontal slip value corresponding to the detection interval, it is determined that there is a sliding zone in the detection interval, otherwise it is determined that there is no sliding zone in the detection interval;

[0041] When determining that the sliding type of the slope is collapse type, if the actual annual average horizontal slip value of the highest point relative to the lowest point of any detection interval is not greater than the second preset annual average horizontal slip value corresponding to the detection interval, it is determined that there is a sliding zone in the detection interval; otherwise, it is determined that there is no sliding zone in the detection interval.

[0042] Furthermore, the first preset annual average horizontal slip value corresponding to any detection interval is calculated using the following formula:

[0043] V1=A1×(H1―H2)

[0044] Among them, V1 is the first preset annual average horizontal slip value corresponding to the detection interval; H1 is the elevation value of the highest point of the detection interval; H2 is the elevation value of the lowest point of the detection interval; A1 is the first empirical coefficient, and the value range is 4 mm / m* to 10 mm / m*year.

[0045] Furthermore, the value of the first empirical coefficient is 5 mm / m*year.

[0046] Furthermore, the second preset annual average horizontal slip value corresponding to any detection interval is calculated using the following formula:

[0047] V2=A2×(H3―H4)

[0048] Among them, V2 is the second preset annual average horizontal slip value corresponding to the detection interval; H3 is the elevation value of the highest point of the detection interval; H4 is the elevation value of the lowest point of the detection interval; A2 is the second empirical coefficient, and the value range is -2 mm / m* to -5 mm / m*year.

[0049] Furthermore, the value of the second empirical coefficient is -2 mm / m*year.

[0050] According to the method for determining the sliding zone of a slope provided by the present invention, the present invention also provides a system for determining the sliding zone of a slope, comprising: a mobile inclinometer, a first determination module, a second determination module and a calculation module;

[0051] The mobile inclinometer is used to perform multiple displacement detections on the intervals of the inclinometer holes arranged in the area where the slope is located, so as to obtain hole depth-displacement curve information of the inclinometer holes, wherein the hole depth-displacement curve information includes the corresponding hole depth-displacement curve obtained by each displacement monitoring;

[0052] The first judgment module is used to determine whether the sliding type of the slope is a landslide or a collapse type according to the obtained hole depth-displacement curve information; and send the judgment result as sliding type information to the second judgment module;

[0053] The calculation module is used to calculate the actual annual average horizontal slip value of the highest point relative to the lowest point in each detection interval based on the corresponding hole depth-displacement curve obtained by the first displacement monitoring and the corresponding hole depth-displacement curve obtained by the last displacement monitoring;

[0054] Wherein, the area between two adjacent detection points in the inclinometer hole is set as a detection interval;

[0055] The second judgment module is used to judge whether there is a sliding zone in each of the detection intervals according to the obtained actual annual average horizontal slip values ​​and the received sliding type information.

[0056] Furthermore, the sliding zone determination system of the slope also includes an acquisition module and an evaluation module;

[0057] The acquisition module is used to acquire groundwater level information, core information and in-hole video information of the inclinometer holes during the process of arranging the inclinometer holes in the area where the slope is located;

[0058] The second judgment module is used to preliminarily determine whether there is a sliding belt in each detection interval according to the obtained actual average annual horizontal slip values ​​and the received sliding type information, and count the number of detection intervals preliminarily determined to have sliding belts in all detection intervals, which is recorded as a first number;

[0059] The evaluation module is used to evaluate multiple determination indicators of each detection interval preliminarily determined to have a sliding belt according to the groundwater level information, the core information and the in-hole video information when the first number is greater than a preset number; and verify whether there is a sliding belt in each detection interval preliminarily determined to have a sliding belt according to the evaluation results of each determination indicator; wherein the multiple determination indicators include two indicators: integrity and groundwater level. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 The process diagram of the method for determining the sliding zone of the slope in Example 1 is shown in FIG. Figure 1 ;

[0061] Figure 2 The process diagram of the method for determining the sliding zone of the slope in Example 1 is shown in FIG. Figure 2 ;

[0062] Figure 3 It is the corresponding hole depth-displacement curve obtained by each displacement monitoring in Example 1. DETAILED DESCRIPTION

[0063] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention:

[0064] Embodiment 1:

[0065] like Figure 1 As shown, embodiment 1 provides a method for determining a sliding zone of a slope, comprising:

[0066] Inclinometer holes are arranged in the area where the slope is located; a mobile inclinometer is used to perform multiple displacement detections on the intervals of the inclinometer holes to obtain hole depth-displacement curve information of the inclinometer holes, wherein the hole depth-displacement curve information includes the corresponding hole depth-displacement curve obtained from each displacement monitoring;

[0067] The sliding type of the slope is judged based on the obtained hole depth-displacement curve information. If, relative to the first displacement monitoring, the horizontal displacement values ​​of each detection point to the outside of the slope in the subsequent displacement monitoring are all positive numbers, and they all gradually increase with the passage of time, then the sliding type of the slope is determined to be a landslide type; if, relative to the first displacement monitoring, the horizontal displacement values ​​of each detection point to the outside of the slope in the subsequent displacement monitoring are all negative numbers, and they all gradually decrease with the passage of time, then the sliding type of the slope is determined to be a collapse type;

[0068] The area between two adjacent detection points in the inclinometer hole is set as a detection interval;

[0069] According to the corresponding hole depth-displacement curve obtained from the first displacement monitoring and the corresponding hole depth-displacement curve obtained from the last displacement monitoring, the actual annual average horizontal slip value of the highest point relative to the lowest point in each detection interval is calculated;

[0070] According to the sliding type of the slope and the actual annual average horizontal slip values ​​obtained, it is determined whether there is a sliding zone in each detection interval.

[0071] The above technical scheme determines whether there is a sliding zone in each detection interval by determining the sliding type of the slope and the actual average annual horizontal slip value of the highest point of each detection interval relative to the lowest point, and provides a marked and standardized determination method for determining the position of the sliding zone. The operation method of the technical scheme is simple and easy, and does not incur additional costs. It has the advantages of strong operability, high recognition and high reliability. It solves the problem that due to the lack of a standardized sliding zone determination method, a mobile inclinometer is used in the prior art to determine the position of the sliding zone of the slope. In the process of analyzing and collating the inclinometer hole data, it is often encountered that the sliding zone is difficult to accurately identify or the sliding zone is seriously misjudged due to factors such as the complex and diverse hole depth-displacement curves and the experience of technical personnel. It has wide applicability and promotion prospects, and can be actively used in geological disaster control projects, road and bridge traffic projects, deep foundation pit projects, reservoir dam safety monitoring and other fields to better achieve disaster prevention and mitigation goals.

[0072] Among them, when it is impossible to determine whether the sliding type of the slope is a landslide type or a collapse type, it is determined that there is a defect in the hole depth-displacement curve information; after preprocessing the hole depth-displacement curve information, the sliding type of the slope is judged based on the preprocessed hole depth-displacement curve information.

[0073] Among them, the method of preprocessing the hole depth-displacement curve information belongs to the conventional means in this field and will not be described in detail in the present invention.

[0074] Preferably, in this embodiment 1, Figure 2 As shown, according to the sliding type of the slope and the actual annual average horizontal slip values ​​obtained, it is preliminarily determined whether there is a sliding zone in each detection interval, and the number of detection intervals preliminarily determined to have sliding zones in all detection intervals is counted, which is recorded as the first number;

[0075] In the process of arranging inclinometer holes in the area where the slope is located, the groundwater level information, core information and in-hole video information of the inclinometer holes are obtained;

[0076] If the first number is not less than the preset number, multiple determination indicators of each detection interval preliminarily determined to have a sliding zone are evaluated according to the groundwater level information, the core information and the in-hole video information; and based on the evaluation results of each determination indicator, whether there is a sliding zone in each detection interval preliminarily determined to have a sliding zone is verified;

[0077] Multiple judgment indicators include integrity and groundwater level.

[0078] In the actual engineering execution process, simply referring to the displacement detection data, sometimes multiple sliding zones will be determined on the slope. When too many sliding zones are determined, it often means that some of these sliding zones may be misjudged. In the process of arranging the inclinometer holes, the groundwater level information, core information and in-hole video information of the inclinometer holes are obtained; multiple judgment indicators of each detection interval preliminarily determined to have a sliding zone are evaluated; and then, based on the evaluation results of each judgment indicator, it is verified whether there is a sliding zone in each detection interval preliminarily determined to have a sliding zone; thereby avoiding the occurrence of misjudgment to the greatest extent; ensuring the accuracy of the judgment on whether there is a sliding zone in each detection interval.

[0079] In the process of arranging inclinometer holes, the groundwater level information, core information and in-hole video information of the inclinometer holes are obtained; the data results of multiple disciplines such as drilling, geophysical exploration, geology and monitoring are fully utilized, and the above data results are combined with displacement detection data. This can most directly and reliably reflect and reveal the deep underground displacement information, which can not only make full use of the results of the early investigation and monitoring of the project, but also save the cost investment of investigation and monitoring that may be added in the later stage, greatly improve the quality of related technical achievements, and help save the total investment of the project.

[0080] Specifically, in this embodiment 1, the preset number ranges from 2 to 5.

[0081] Preferably, in this embodiment 1, the preset number is 2.

[0082] Specifically, in this embodiment 1, according to the evaluation results of various determination indicators, the method for verifying whether there is a sliding band in each detection interval preliminarily determined to have a sliding band includes:

[0083] If the evaluation result of any one of the multiple judgment indicators of any detection interval preliminarily determined to have a sliding band is unqualified, then the detection interval preliminarily determined to have a sliding band is verified to have a sliding band; if the evaluation results of all the multiple judgment indicators of any detection interval preliminarily determined to have a sliding band are qualified, then the detection interval preliminarily determined to have a sliding band is verified to have no sliding band.

[0084] In this embodiment 1, the method for evaluating the integrity of any detection interval in which the sliding zone is preliminarily determined to exist includes multiple methods, including but not limited to the following two methods:

[0085] Method 1:

[0086] Methods for evaluating the integrity of any detection interval where a slip zone is preliminarily determined to exist include:

[0087] Based on the core information and the in-hole video information, determine whether there are weak rock layers and / or bedrock-covering layer interfaces in the detection interval where the sliding zone is preliminarily determined to exist. If it is determined that there are weak rock layers and / or bedrock-covering layer interfaces in the detection interval where the sliding zone is preliminarily determined to exist, the evaluation result of the indicator integrity of the detection interval where the sliding zone is preliminarily determined to exist is unqualified; if it is determined that there are no weak rock layers and no bedrock-covering layer interfaces in the detection interval where the sliding zone is preliminarily determined to exist, the evaluation result of the indicator integrity of the detection interval where the sliding zone is preliminarily determined to exist is qualified.

[0088] Method 2:

[0089] In the process of arranging the inclinometer holes in the area where the slope is located, the rock mass acoustic wave velocity information of the inclinometer holes is also obtained;

[0090] The method for evaluating the integrity of any detection interval where a sliding zone is initially determined to exist includes: making two judgments based on core information, in-hole video information and rock mass acoustic wave velocity information;

[0091] One of the judgments is: judging whether there is a weak rock layer and / or a bedrock-cover layer interface in the detection interval where the sliding zone is initially determined to exist, based on the core information and the in-hole video information;

[0092] Another judgment is: judging, based on the rock mass acoustic wave velocity information, whether the maximum difference between the average value of the rock mass acoustic wave velocity in the detection interval where the sliding zone is preliminarily determined to exist and the average value of the rock mass acoustic wave velocity in the adjacent detection interval is greater than a preset difference;

[0093] If it is determined that there is no weak rock layer and no bedrock-covering layer interface in the detection interval where the sliding zone is preliminarily determined to exist, and the maximum difference is determined to be no greater than the preset difference, then the evaluation result of the integrity of the detection interval where the sliding zone is preliminarily determined to exist is qualified; otherwise, the evaluation result is unqualified.

[0094] By setting the rock mass acoustic wave velocity information of the inclinometer holes obtained during the arrangement of the inclinometer holes as the evaluation basis for evaluating the integrity of the detection interval for the preliminary determination of the existence of a sliding zone, the accuracy of the judgment on whether there is a sliding zone in each detection interval can be further guaranteed.

[0095] Specifically, in this embodiment 1, the preset difference value ranges from 1500 m / s to 2500 m / s.

[0096] Preferably, the preset difference is 2000 m / s.

[0097] Specifically, in this embodiment 1, the method for evaluating the groundwater level indicator of any detection interval where the sliding zone is preliminarily determined to exist includes:

[0098] It is determined based on the groundwater level information whether the elevation of the groundwater level at the inclinometer hole is within the elevation range of the detection interval for the preliminary determination of the existence of a sliding zone; if it is determined that the elevation of the groundwater level at the inclinometer hole is within the elevation range of the detection interval for the preliminary determination of the existence of a sliding zone, then the evaluation result of the groundwater level indicator in the detection interval for the preliminary determination of the existence of a sliding zone is unqualified; if it is determined that the elevation of the groundwater level at the inclinometer hole is outside the elevation range of the detection interval for the preliminary determination of the existence of a sliding zone, then the evaluation result of the groundwater level indicator in the detection interval for the preliminary determination of the existence of a sliding zone is qualified.

[0099] Specifically, in this embodiment 1, the actual annual average horizontal slip value of the highest point relative to the lowest point in any detection interval is calculated using the following formula:

[0100]

[0101] Among them, V is the actual average annual horizontal slip value of the highest point of the detection interval relative to the lowest point; S1 is the horizontal displacement value of the highest point of the detection interval to the outside of the slope measured in the last displacement monitoring; S2 is the horizontal displacement value of the highest point of the detection interval to the outside of the slope measured in the first displacement monitoring; S3 is the horizontal displacement value of the lowest point of the detection interval to the outside of the slope measured in the last displacement monitoring; S4 is the horizontal displacement value of the lowest point of the detection interval to the outside of the slope measured in the first displacement monitoring; T1 is the time of the last displacement monitoring; T2 is the time of the first displacement monitoring.

[0102] Specifically, in this embodiment 1, according to the sliding type of the slope and the obtained actual annual average horizontal slip values, the method for determining whether there is a sliding zone in each detection interval includes:

[0103] When determining that the sliding type of the slope is a landslide type, if the actual annual average horizontal slip value of the highest point relative to the lowest point of a certain detection interval is not less than the first preset annual average horizontal slip value corresponding to the detection interval, it is determined that there is a sliding zone in the detection interval, otherwise it is determined that there is no sliding zone in the detection interval;

[0104] When determining that the sliding type of the slope is collapse type, if the actual average annual horizontal slip value of the highest point relative to the lowest point in any detection interval is not greater than the second preset average annual horizontal slip value corresponding to the detection interval, it is determined that there is a sliding zone in the detection interval; otherwise, it is determined that there is no sliding zone in the detection interval.

[0105] The first preset annual average horizontal slip value corresponding to any detection interval is calculated using the following formula:

[0106] V1=A1×(H1―H2)

[0107] Among them, V1 is the first preset annual average horizontal slip value corresponding to the detection interval; H1 is the elevation value of the highest point of the detection interval; H2 is the elevation value of the lowest point of the detection interval; A1 is the first empirical coefficient, and the value range is 4 mm / m* to 10 mm / m*year.

[0108] Preferably, in this embodiment 1, the value of the first empirical coefficient is 5 mm / m*year.

[0109] For example, in this embodiment 1, the corresponding hole depth-displacement curve (such as Figure 3 As shown), the sliding type of the slope is determined to be landslide; and the actual annual average horizontal slip value of the highest point relative to the lowest point in the detection interval of hole depth 21m-22m is calculated to be 5mm / year; the first preset annual average horizontal slip value corresponding to the detection interval of hole depth 21m-22m is calculated to be 5mm / year (according to the value of the first empirical coefficient of 5mm / m*year); the actual annual average horizontal slip value of the highest point relative to the lowest point in the detection interval of hole depth 60m-61m is calculated to be 10mm / year; the first preset annual average horizontal slip value corresponding to the detection interval of hole depth 60m-61m is calculated to be 5mm / year (according to the value of the first empirical coefficient of 5mm / m*year); it is preliminarily determined that there are sliding zones in the detection interval of hole depth 21m-22m and the detection interval of hole depth 60m-61m.

[0110] The second preset annual average horizontal slip value corresponding to any detection interval is calculated using the following formula:

[0111] V2=A2×(H3―H4)

[0112] Among them, V2 is the second preset annual average horizontal slip value corresponding to the detection interval; H3 is the elevation value of the highest point of the detection interval; H4 is the elevation value of the lowest point of the detection interval; A2 is the second empirical coefficient, and the value range is -2 mm / m* to -5 mm / m*year.

[0113] Preferably, in this embodiment 1, the value of the second empirical coefficient is -2 mm / m*year.

[0114] Embodiment 2:

[0115] According to the method for determining the sliding zone of a slope provided in Example 1, Example 2 provides a system for determining the sliding zone of a slope, including: a mobile inclinometer, a first determination module, a second determination module and a calculation module;

[0116] The mobile inclinometer is used to perform multiple displacement detections on the intervals of the inclinometer holes arranged in the area where the slope is located, so as to obtain the hole depth-displacement curve information of the inclinometer holes, and the hole depth-displacement curve information includes the corresponding hole depth-displacement curve obtained by each displacement monitoring;

[0117] The first judgment module is used to determine whether the sliding type of the slope is a landslide or a collapse type according to the obtained hole depth-displacement curve information; and send the judgment result as sliding type information to the second judgment module;

[0118] The calculation module is used to calculate the actual annual average horizontal slip value of the highest point relative to the lowest point in each detection interval based on the corresponding hole depth-displacement curve obtained by the first displacement monitoring and the corresponding hole depth-displacement curve obtained by the last displacement monitoring;

[0119] The area between two adjacent detection points in the inclinometer hole is set as a detection interval;

[0120] The second judgment module is used to judge whether there is a sliding zone in each detection interval according to the obtained actual annual average horizontal slip values ​​and the received sliding type information.

[0121] Preferably, in this embodiment 2, the sliding zone determination system of the slope further includes an acquisition module and an evaluation module;

[0122] The acquisition module is used to obtain groundwater level information, core information and in-hole video information of the inclinometer holes in the process of arranging the inclinometer holes in the area where the slope is located;

[0123] The second judgment module is used to preliminarily judge whether there is a sliding zone in each detection interval according to the obtained actual annual average horizontal slip values ​​and the received sliding type information, and count the number of detection intervals preliminarily judged to have sliding zones in all detection intervals, which is recorded as a first number;

[0124] The evaluation module is used to evaluate multiple determination indicators of each detection interval preliminarily determined to have a sliding zone according to groundwater level information, core information and in-hole video information when the first number is greater than a preset number; and to verify whether there is a sliding zone in each detection interval preliminarily determined to have a sliding zone according to the evaluation results of each determination indicator; wherein the multiple determination indicators include two indicators: integrity and groundwater level.

[0125] The method and system for determining the sliding zone of a slope provided by this embodiment have at least the following technical effects or advantages:

[0126] 1. By determining the sliding type of the slope and the actual average annual horizontal slip value of the highest point of each detection interval relative to the lowest point, it is determined whether there is a sliding zone in each detection interval, which provides a marked and standardized determination method for determining the position of the sliding zone. The operation method of the technical solution is simple and easy, does not incur additional costs, and has the advantages of strong operability, high recognition and high reliability. It solves the problem that due to the lack of a standardized sliding zone determination method, a mobile inclinometer is used in the prior art to determine the position of the sliding zone of the slope. In the process of analyzing and collating the inclinometer hole data, it is often encountered that the sliding zone is difficult to accurately identify or seriously misjudge the sliding zone due to factors such as the complex and diverse hole depth-displacement curves and the experience of technical personnel; it has wide applicability and promotion prospects, and can be actively used in geological disaster control projects, road and bridge traffic projects, deep foundation pit projects, reservoir dam safety monitoring and other fields to better achieve disaster prevention and mitigation goals.

[0127] 2. In the actual engineering execution process, simply referring to the displacement detection data, sometimes multiple sliding zones will be determined on the slope. When too many sliding zones are determined, it often means that some of these sliding zones may be misjudged. In the process of arranging the inclinometer holes, the groundwater level information, core information and in-hole video information of the inclinometer holes are obtained; multiple judgment indicators of each detection interval preliminarily determined to have a sliding zone are evaluated; and then, based on the evaluation results of each judgment indicator, whether there is a sliding zone in each detection interval preliminarily determined to have a sliding zone is verified; thereby avoiding the occurrence of misjudgment to the greatest extent; ensuring the accuracy of the judgment on whether there is a sliding zone in each detection interval.

[0128] In the process of arranging inclinometer holes, the groundwater level information, core information and in-hole video information of the inclinometer holes are obtained; the data results of multiple disciplines such as drilling, geophysical exploration, geology and monitoring are fully utilized, and the above data results are combined with displacement detection data. This can most directly and reliably reflect and reveal the deep underground displacement information, which can not only make full use of the results of the early investigation and monitoring of the project, but also save the cost investment of investigation and monitoring that may be added in the later stage, greatly improve the quality of related technical achievements, and help save the total investment of the project.

[0129] 3. By setting the rock mass acoustic wave velocity information of the inclinometer holes obtained during the arrangement of the inclinometer holes as the evaluation basis for evaluating the integrity of the detection interval for the preliminary determination of the existence of the sliding zone, the accuracy of the judgment on whether there is a sliding zone in each detection interval can be further guaranteed.

[0130] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for determining a sliding zone of a slope, characterized in that: include: Arrange inclinometer holes in the area where the slope is located; Using a mobile inclinometer to perform multiple displacement detections on the inclinometer hole intervals to obtain hole depth-displacement curve information of the inclinometer hole, wherein the hole depth-displacement curve information includes the corresponding hole depth-displacement curve obtained from each displacement monitoring; The sliding type of the slope is judged according to the obtained hole depth-displacement curve information. If, relative to the first displacement monitoring, the horizontal displacement values ​​of each detection point toward the outside of the slope in each subsequent displacement monitoring are all positive numbers, and all gradually increase with the passage of time, then the sliding type of the slope is judged to be a landslide type; if, relative to the first displacement monitoring, the horizontal displacement values ​​of each detection point toward the outside of the slope in each subsequent displacement monitoring are all negative numbers, and all gradually decrease with the passage of time, then the sliding type of the slope is judged to be a collapse type; Setting the area between two adjacent detection points in the inclinometer hole as a detection interval; The actual annual average horizontal slip value of the highest point relative to the lowest point in each detection interval is calculated based on the corresponding hole depth-displacement curve obtained from the first displacement monitoring and the corresponding hole depth-displacement curve obtained from the last displacement monitoring; According to the sliding type of the slope and the obtained actual annual average horizontal slip values, it is determined whether there is a sliding zone in each of the detection intervals.

2. The method for determining the sliding zone of a slope according to claim 1, characterized in that: Preliminarily determining whether there is a sliding zone in each detection interval according to the sliding type of the slope and the actual annual average horizontal sliding values ​​obtained, and counting the number of detection intervals preliminarily determined to have sliding zones in all detection intervals, recorded as a first number; In the process of arranging inclinometer holes in the area where the slope is located, obtaining groundwater level information, core information and in-hole video information of the inclinometer holes; If the first number is not less than a preset number, evaluating multiple determination indicators of each detection interval preliminarily determined to have a sliding zone according to the groundwater level information, the core information and the in-hole video information; verifying whether each detection interval preliminarily determined to have a sliding zone has a sliding zone according to the evaluation results of each determination indicator; The multiple determination indicators include two indicators: integrity and groundwater level.

3. The method for determining the sliding zone of a slope according to claim 2, characterized in that: The preset number ranges from 2 to 5.

4. The method for determining the sliding zone of a slope according to claim 2, characterized in that: According to the evaluation results of various judgment indicators, the method for verifying whether there is a sliding belt in each detection interval where the sliding belt is initially determined to exist includes: If the evaluation result of any one of the multiple judgment indicators of any detection interval preliminarily determined to have a sliding band is unqualified, then the detection interval preliminarily determined to have a sliding band is verified to have a sliding band; if the evaluation results of all the multiple judgment indicators of any detection interval preliminarily determined to have a sliding band are qualified, then the detection interval preliminarily determined to have a sliding band is verified to have no sliding band.

5. The method for determining the sliding zone of a slope according to claim 4, characterized in that: Methods for evaluating the integrity of any detection interval where a slip zone is preliminarily determined to exist include: According to the core information and the in-hole video information, determine whether there are weak rock layers and / or bedrock-covering layer interfaces in the detection interval where the sliding zone is preliminarily determined to exist. If it is determined that there are weak rock layers and / or bedrock-covering layer interfaces in the detection interval where the sliding zone is preliminarily determined to exist, then the evaluation result of the indicator integrity of the detection interval where the sliding zone is preliminarily determined to exist is unqualified; if it is determined that there are no weak rock layers and no bedrock-covering layer interfaces in the detection interval where the sliding zone is preliminarily determined to exist, then the evaluation result of the indicator integrity of the detection interval where the sliding zone is preliminarily determined to exist is qualified.

6. The method for determining the sliding zone of a slope according to claim 4, characterized in that: In the process of arranging inclinometer holes in the area where the slope is located, the rock mass acoustic wave velocity information of the inclinometer holes is also obtained; The method for evaluating the integrity of any detection interval where a sliding zone is preliminarily determined to exist comprises: making two judgments based on the core information, the in-hole video information and the rock mass acoustic wave velocity information; One of the judgments is: judging whether there is a weak rock layer and / or a bedrock-cover layer interface in the detection interval where the sliding zone is preliminarily determined to exist, based on the core information and the in-hole video information; Another judgment is: judging, based on the rock mass acoustic wave velocity information, whether the maximum difference between the average value of the rock mass acoustic wave velocity in the detection interval where the sliding zone is preliminarily determined to exist and the average value of the rock mass acoustic wave velocity in the adjacent detection interval is greater than a preset difference; If it is determined that there is no weak rock layer and no bedrock-covering layer interface in the detection interval where the sliding zone is preliminarily determined to exist, and if it is determined that the maximum difference is not greater than the preset difference, then the evaluation result of the integrity of the detection interval where the sliding zone is preliminarily determined to exist is qualified; otherwise, the evaluation result is unqualified.

7. The method for determining the sliding zone of a slope according to claim 6, characterized in that: The preset difference value ranges from 1500 m / s to 2500 m / s.

8. The method for determining the sliding zone of a slope according to claim 4, characterized in that: Methods for evaluating the groundwater level of any detection interval where a sliding zone is preliminarily determined to exist include: It is determined according to the groundwater level information whether the elevation of the groundwater level at the inclinometer hole is within the elevation range of the detection interval for the preliminary determination of the existence of a sliding zone; if it is determined that the elevation of the groundwater level at the inclinometer hole is within the elevation range of the detection interval for the preliminary determination of the existence of a sliding zone, then the evaluation result of the groundwater level indicator in the detection interval for the preliminary determination of the existence of a sliding zone is unqualified; if it is determined that the elevation of the groundwater level at the inclinometer hole is outside the elevation range of the detection interval for the preliminary determination of the existence of a sliding zone, then the evaluation result of the groundwater level indicator in the detection interval for the preliminary determination of the existence of a sliding zone is qualified.

9. The method for determining the sliding zone of a slope according to claim 1, characterized in that: The actual average annual horizontal slip value of the highest point relative to the lowest point in any detection interval is calculated using the following formula: Among them, V is the actual average annual horizontal slip value of the highest point of the detection interval relative to the lowest point; S1 is the horizontal displacement value of the highest point of the detection interval to the outside of the slope measured in the last displacement monitoring; S2 is the horizontal displacement value of the highest point of the detection interval to the outside of the slope measured in the first displacement monitoring; S3 is the horizontal displacement value of the lowest point of the detection interval to the outside of the slope measured in the last displacement monitoring; S4 is the horizontal displacement value of the lowest point of the detection interval to the outside of the slope measured in the first displacement monitoring; T1 is the time of the last displacement monitoring; T2 is the time of the first displacement monitoring.

10. The method for determining the sliding zone of a slope according to claim 9, characterized in that: According to the sliding type of the slope and the obtained actual annual average horizontal slip values, the method for judging whether there is a sliding zone in each detection interval includes: When determining that the sliding type of the slope is a landslide type, if the actual annual average horizontal slip value of the highest point relative to the lowest point of a certain detection interval is not less than the first preset annual average horizontal slip value corresponding to the detection interval, it is determined that there is a sliding zone in the detection interval, otherwise it is determined that there is no sliding zone in the detection interval; When determining that the sliding type of the slope is collapse type, if the actual annual average horizontal slip value of the highest point relative to the lowest point of any detection interval is not greater than the second preset annual average horizontal slip value corresponding to the detection interval, it is determined that there is a sliding zone in the detection interval; otherwise, it is determined that there is no sliding zone in the detection interval.

11. The method for determining the sliding zone of a slope according to claim 10, characterized in that: The first preset annual average horizontal slip value corresponding to any detection interval is calculated using the following formula: V1=A1×(H1―H2) Among them, V1 is the first preset annual average horizontal slip value corresponding to the detection interval; H1 is the elevation value of the highest point of the detection interval; H2 is the elevation value of the lowest point of the detection interval; A1 is the first empirical coefficient, and the value range is 4 mm / m* to 10 mm / m*year.

12. The method for determining the sliding zone of a slope according to claim 10, characterized in that: The second preset annual average horizontal slip value corresponding to any detection interval is calculated using the following formula: V2=A2×(H3―H4) Among them, V2 is the second preset annual average horizontal slip value corresponding to the detection interval; H3 is the elevation value of the highest point of the detection interval; H4 is the elevation value of the lowest point of the detection interval; A2 is the second empirical coefficient, and the value range is -2 mm / m* to -5 mm / m*year.

13. A system for determining a sliding zone of a slope, characterized in that: include: A mobile inclinometer, a first judgment module, a second judgment module and a calculation module; The mobile inclinometer is used to perform multiple displacement detections on the intervals of the inclinometer holes arranged in the area where the slope is located, so as to obtain hole depth-displacement curve information of the inclinometer holes, wherein the hole depth-displacement curve information includes the corresponding hole depth-displacement curve obtained by each displacement monitoring; The first judgment module is used to determine whether the sliding type of the slope is a landslide or a collapse type according to the obtained hole depth-displacement curve information; and send the judgment result as sliding type information to the second judgment module; The calculation module is used to calculate the actual annual average horizontal slip value of the highest point relative to the lowest point in each detection interval based on the corresponding hole depth-displacement curve obtained by the first displacement monitoring and the corresponding hole depth-displacement curve obtained by the last displacement monitoring; Wherein, the area between two adjacent detection points in the inclinometer hole is set as a detection interval; The second judgment module is used to judge whether there is a sliding zone in each of the detection intervals according to the obtained actual annual average horizontal slip values ​​and the received sliding type information; The slope sliding zone determination system is used to execute the steps in the slope sliding zone determination method as claimed in claim 1.

14. The sliding zone determination system of the slope according to claim 13, characterized in that: It also includes acquisition modules and evaluation modules; The acquisition module is used to acquire groundwater level information, core information and in-hole video information of the inclinometer holes during the process of arranging the inclinometer holes in the area where the slope is located; The second judgment module is used to preliminarily determine whether there is a sliding belt in each detection interval according to the obtained actual average annual horizontal slip values ​​and the received sliding type information, and count the number of detection intervals preliminarily determined to have sliding belts in all detection intervals, which is recorded as a first number; The evaluation module is used to evaluate multiple determination indicators of each detection interval preliminarily determined to have a sliding belt according to the groundwater level information, the core information and the in-hole video information when the first number is greater than a preset number; and verify whether there is a sliding belt in each detection interval preliminarily determined to have a sliding belt according to the evaluation results of each determination indicator; wherein the multiple determination indicators include two indicators: integrity and groundwater level.

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