A method, system, device and storage medium for determining ground fissure activity based on changes in stratum thickness

Abstract

The present application relates to the technical field of geological disaster prevention, in particular to a method, system and device for determining ground fissure activity based on stratum thickness variation and a storage medium, the method comprising the following steps: S1, determining the position of the ground fissure in each stratum; S2, measuring the relevant parameters of the corresponding ground fissure for each stratum; S3, for each stratum, using the upper limit angle α, the lower limit angle β and the profile apparent error distance D 上 and D 下 to obtain the true vertical activity D h of each stratum; S4, obtaining the true vertical activity of the ground fissure; S5, obtaining the true horizontal activity of the ground fissure. The present application can accurately and efficiently determine the vertical and horizontal activity values of the ground fissure, eliminate the profile error distance difference caused by stratum thickness variation, and directly calculate the inclined stratum of various angles.

Description

Technical Field

[0001] The present invention relates to the technical field of geological disaster prevention, and in particular to a method, system, device and storage medium for determining ground fissure activity based on changes in stratum thickness. Background Art

[0002] During their formation and expansion, ground fissures damage the natural soil structure and cause cracking of overlying buildings, road deformation, and pipeline damage, severely endangering human life. The primary factor in carrying out various engineering activities in ground fissure sites is to understand their characteristics, providing a theoretical basis and accurate parameters for disaster prevention and engineering defenses. Because the formation of ground fissures is controlled by multiple factors, they exhibit three types of movement: horizontal tension, strike-slip dislocation, and vertical displacement, driven by hidden faults, regional stress field tension, and groundwater subsidence.

[0003] Currently, determining the extent of ground fissure activity relies primarily on ground deformation monitoring or macroscopic analysis of the strata through geological drilling. Because some ground fissures move slowly and at uneven rates, surface monitoring is difficult to accurately reflect. Macroscopic analysis through geological drilling can only estimate the vertical offset of ground fissures, but cannot capture the components in the other two directions.

[0004] Existing technologies cannot directly measure the true horizontal and vertical displacements of strata at different depths within ground fissures, resulting in inaccurate estimates of ground fissure activity. This introduces uncertainty into disaster prevention and mitigation efforts at these sites. Therefore, it is necessary to develop a method that can accurately calculate the horizontal and vertical movement of ground fissures, providing accurate baseline data for subsequent ground fissure research and engineering defenses. Summary of the Invention

[0005] To address the problem in the prior art of low accuracy in estimating ground fissure activity due to the inability to directly obtain the true horizontal and vertical displacements of the bottom layers at different depths of the ground fissures, the present invention provides a method, system, device and storage medium for determining ground fissure activity based on changes in stratum thickness.

[0006] The present invention is achieved through the following technical solutions:

[0007] A method for determining the amount of ground fissure activity based on changes in stratum thickness comprises the following steps:

[0008] S1: Excavate a deep trench according to the specifications and site conditions, perform leveling, surface cleaning, and layer description of the bottom layer, and determine the location of the ground fissures in each layer;

[0009] S2, for each stratum, measure the relevant parameters of the corresponding ground fissures, including the apparent offset distance D of the main bottom layer 上 and D 下, the elevation of the upper and lower interfaces of the two soil bodies, the width of the exploration trench H in the direction of the ground fissure, and the angle between the upper boundaries of the main strata on the two walls of the exploration trench α , the angle between the lower boundary and β ;

[0010] S3, for each stratum, using its corresponding upper limit angle α , the angle between the lower boundary β And the apparent offset D 上 and D 下 , obtain the true vertical activity D of the stratum h ;

[0011] S4, based on the actual vertical activity D of the stratum h Get the vertical movement of the ground fissure D H ;

[0012] S5, obtaining the actual horizontal activity of the ground fissures according to the vertical activity of the ground fissures.

[0013] Preferably, in S2, the angle α and angle β Obtained using a level or elevation calculation.

[0014] Preferably, in S3, the true vertical activity D h Including the true vertical activity D of the upper limit h1 The true vertical activity D of the lower boundary h2 .

[0015] Preferably, the upper limit true vertical activity D h1 The true vertical activity D of the lower boundary h2 The calculation process is as follows:

[0016] The true vertical movement of the soil in the two plates of the ground fissure is:

[0017] D h1 =D h2

[0018] The stratum offset distance directly measured by the trench profile is:

[0019] D 上 =a1+D h1

[0020] D 下 =D h1 -a2

[0021] The true horizontal slip of the two soil layers in the ground fissure is:

[0022] X=a1×tan α =a²×tan β

[0023] It can be seen from this that the vertical dislocation caused by the horizontal displacement of the uneven strata has the following relationship:

[0024] a1+a2=L a -L b =D 上 -D 下

[0025] a1 / a2=tan α / tan β

[0026] Calculate a1 and a2 separately:

[0027]

[0028] .

[0029] Preferably, in S4, the actual vertical activity of the ground fissures is obtained on the premise that the strata satisfy the uniform distribution assumption.

[0030] Preferably, the actual vertical movement of the ground fissure D H is the actual vertical activity D of the corresponding stratum h One half of , the calculation formula is:

[0031] .

[0032] Preferably, the calculation formula for the actual horizontal activity X of the ground fissure is:

[0033] .

[0034] A system for determining the amount of ground fissure activity based on changes in stratum thickness includes a data acquisition module, a data processing module, and a data output module. The data acquisition module is used to measure the relevant parameters of the corresponding ground fissure for each stratum, and the data processing module is used to calculate the true vertical activity D of each stratum. h , the actual vertical activity of the ground fissures and the actual horizontal activity of the ground fissures.

[0035] An electronic device includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the method for determining the amount of ground fissure activity based on changes in stratum thickness are implemented.

[0036] A storage medium stores a computer program, which, when executed by a processor, implements the steps of the method for determining the amount of ground fissure activity based on changes in stratum thickness.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] The present invention provides a method for determining ground fissure activity based on changes in stratum thickness. This method further improves and innovates the method for calculating the true ground fissure activity, making it not limited to a single engineering site. The method also further optimizes the calculation method, making it not limited to a specific bottom horizontal stratum but applicable to most inclined strata. This invention improves upon the inaccurate estimation of vertical offsets in previous ground fissure surveys. By using the apparent stratum offset of the trench to calculate the true vertical and horizontal activity of ground fissures, the present invention can accurately and efficiently determine the activity of ground fissures in a particular area, providing reliable basic data for subsequent research and engineering projects. This method is also of great significance for calculating the activity rate of ground fissures and determining the active period, resolving problems existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a flow chart of a method for determining ground fissure activity based on changes in stratum thickness according to the present invention;

[0040] Figure 2 This is a schematic diagram of the ground dislocation on both sides of the ground fissure proposed by the present invention;

[0041] Figure 3 This is a schematic diagram for calculating the apparent vertical movement of ground fissures proposed in the present invention;

[0042] Figure 4 This is a cross-sectional view of a trench according to an embodiment of the present invention. DETAILED DESCRIPTION

[0043] The present invention will be further described in detail below with reference to specific embodiments, which are intended to explain the present invention rather than to limit it.

[0044] The present invention discloses a method for determining the amount of ground fissure activity based on the change of stratum thickness. Figure 1 , including the following steps:

[0045] S1. According to the specifications and site conditions, deep trenches are excavated, and leveling, surface cleaning and bottom layer description are carried out. The location of ground fissures is determined in each stratum. Specifically, in accordance with the "Geotechnical Engineering Investigation Specification GB50021-2001 (2009 Edition)" and the "Drilling, Well Exploration and Trenching Operation Procedure YS / T 5208-2018", exploration trenches are excavated in combination with site conditions, and basic leveling, surface cleaning and stratum layer description are carried out.

[0046] S2, for each stratum, measure the relevant parameters of the corresponding ground fissures, including the apparent offset distance D of the main bottom layer 上 and D 下, the elevation of the upper and lower interfaces of the two soil bodies, the width of the exploration trench H in the direction of the ground fissure, the angle α between the upper boundary lines of the main strata on the two walls of the exploration trench, and the angle β between the lower boundary lines. Among them, the angle α and the angle β are obtained using a level or elevation calculation.

[0047] S3, for each stratum, using its corresponding upper boundary angle α, lower boundary angle β and profile apparent offset D 上 and D 下 , obtain the true vertical activity D of the stratum h , true vertical activity D h Including the true vertical activity D of the upper limit h1 The true vertical activity D of the lower boundary h2 .

[0048] True vertical motion D h The calculation process is as follows:

[0049] The true vertical movement of the soil in the two plates of the ground fissure is:

[0050] D h1 =D h2 ;

[0051] The true horizontal slip of the two soil layers in the ground fissure is:

[0052] X = a1 × tanα = a2 × tanβ;

[0053] The stratum offset distance directly measured by the trench profile is:

[0054] D 上 =a1+D h1 ;

[0055] D 下 =D h1 -a2;

[0056] It can be seen from this that the vertical dislocation caused by the horizontal displacement of the uneven strata has the following relationship:

[0057] a1+a2=L a -L b =D 上 -D 下

[0058] a1 / a2=tanα / tanβ

[0059] Calculate a1 and a2 separately:

[0060]

[0061] , a1, a2, L a , Lb is the difference in the calculation process.

[0062] S4, based on the actual vertical activity D of the stratum h Get the vertical movement of the ground fissure D H Specifically, the true vertical activity of ground fissures is obtained based on the assumption that the strata satisfy uniform distribution. The calculation formula for the true vertical activity of ground fissures is:

[0063] .

[0064] S5, obtain the actual horizontal activity of the ground fissures according to the vertical activity of the ground fissures. The calculation formula is:

[0065] .

[0066] The method for determining the amount of ground fissure activity based on changes in stratum thickness of the present invention can more accurately determine the amount of ground fissure activity based on changes in stratum thickness, and provide a scientific basis for monitoring, early warning and management of ground fissures. Specifically, first, based on the geological survey report and the actual situation on site, a representative site is selected for deep trench excavation to ensure that the stratum structure can be fully exposed, and the excavated stratum is leveled and cleaned to remove the surface loose soil and impurities in order to carry out subsequent stratum layer description, record the lithology, thickness, color, humidity and other characteristics of each layer, as well as the location, shape and width of the ground fissures. Then, the apparent cross-sectional offset D of the upper and lower interfaces of the main strata is measured. 上 and D 下 , according to the relationship between the change of stratum thickness and the activity of ground fissures, a calculation model is established. The model should take into account the upper limit angle α , the angle between the lower boundary β And the apparent offset D 上 and D 下 The impact on the true vertical activity of the stratum is based on the relationship between the horizontal activity and the vertical activity obtained by analysis, as well as the known vertical activity of the ground fissure D H , thereby obtaining the true horizontal activity of the ground fissures.

[0067] Reference Figure 2 、 3 、4, Figure 4 The scale is 1:50. Taking a ground fissure as an example, the activity amount of the strata (L5 silty clay and L13 clay) is calculated according to the method for determining the activity amount of the ground fissure based on the change of stratum thickness proposed in the present invention. The specific process is as follows:

[0068] S1, excavate the exploration trench according to the specifications and actual site conditions, and complete basic work such as leveling, bottom cleaning and wall cleaning.

[0069] S2, measure the apparent offset of the corresponding stratum in the exploration trench (as shown in Table 1), D 上-L5 = 19.2 cm, D 下-L5 = 27.0 cm,

[0070] D 上-L13 = 53.9 cm, D 下-L13 = 56.2 cm; the width of the bottom of the exploration trench is 5 m; the height difference of the upper boundary line of L5 is 0.217 m, and the height difference of the lower boundary line is 0.193 m; the height difference of the upper boundary line of L13 is 0.041 m, and the height difference of the lower boundary line is 0.170 m.

[0071] According to the field measurement and indoor elevation review, the stratum inclination angle is, , , , .

[0072] Table 1 Related parameters of L5 silty clay and L13 clay

[0073]

[0074] S3, according to the calculation results, the offset distortion error caused by the stratum offset is accurately calculated according to the method proposed in the application:

[0075] = -0.0413

[0076] = -0.0367

[0077] = -0.0044

[0078] = -0.0186

[0079] S4, judge whether the real dislocation is close, that is, judge whether D h1 ≈ D h2 is established:

[0080] = 0.2332

[0081] = 0.2332

[0082] = 0.5439

[0083] = 0.5439

[0084]

[0085]

[0086] The upper and lower boundaries of strata L5 and L13 are close to each other, and the strata are evenly inclined.

[0087] Therefore, the true vertical activity of the ground fissures is calculated as:

[0088] =0.2332

[0089] =0.5439

[0090] S5, after determining the true vertical movement of the ground fissures, calculate the true horizontal movement of the ground fissures:

[0091] =0.0016

[0092] =0.0003

[0093] The present invention also discloses a system for determining the amount of ground fissure activity based on changes in stratum thickness, comprising a data acquisition module, a data processing module and a data output module. The data acquisition module is used to measure the relevant parameters of the ground fissure corresponding to each stratum, and the data processing module is used to calculate the true vertical activity amount D of each stratum. h , the actual vertical activity of the ground fissures and the actual horizontal activity of the ground fissures.

[0094] The present invention also discloses an electronic device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the method for determining the amount of ground fissure activity based on changes in stratum thickness are implemented.

[0095] The present invention also discloses a storage medium storing a computer program, characterized in that when the computer program is executed by a processor, the steps of the method for determining the amount of ground fissure activity based on changes in stratum thickness are implemented.

[0096] The above description is merely a preferred embodiment of the present invention and is not intended to impose any limitation on the technical solution of the present invention. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can also be subjected to several simple modifications and replacements, and these modifications and replacements are also within the scope of protection covered by the claims.

Claims

1. A method for determining ground fissure activity based on changes in stratum thickness, characterized in that: The following steps are involved: S1: Excavate a deep trench according to the specifications and site conditions, perform leveling, surface cleaning, and layer description of the bottom layer, and determine the location of the ground fissures in each layer; S2, for each stratum, measure the relevant parameters of the corresponding ground fissure, including the apparent offset distance D of the main bottom layer 上 and D 下 , the elevation of the upper and lower interfaces of the two soil bodies, the width of the exploration trench H in the direction of the ground fissure, and the angle between the upper boundaries of the main strata on the two walls of the exploration trench α , the angle between the lower boundary and β ; S3, for each stratum, using its corresponding upper limit angle α , the angle between the lower boundary β And the apparent offset D 上 and D 下 , obtain the true vertical activity D of the stratum h ; S4, based on the actual vertical activity D of the stratum h Get the vertical movement of the ground fissure D H ; The actual vertical activity of ground fissures is obtained based on the assumption that the strata meet the uniform distribution; The actual vertical activity of the ground fissure D H is the actual vertical activity D of the corresponding stratum h One half of , the calculation formula is: ； The calculation formula for the true horizontal activity X of the ground fissure is: ； S5, obtaining the actual horizontal activity of the ground fissures according to the vertical activity of the ground fissures.

2. The method for determining ground fissure activity based on stratum thickness changes according to claim 1, characterized in that: In S2, the angle α and angle β Obtained using a level or elevation calculation.

3. The method for determining the amount of ground fissure activity based on stratum thickness changes according to claim 1, characterized in that: In S3, the true vertical activity D h The true vertical activity D of the upper limit h1 The true vertical activity D of the lower boundary h2 .

4. The method for determining ground fissure activity based on stratum thickness changes according to claim 3, characterized in that: Upper limit true vertical activity D h1 The true vertical activity D of the lower boundary h2 The calculation process is as follows: The true vertical movement of the soil in the two plates of the ground fissure is: D h1 =D h2 The stratum offset distance directly measured by the trench profile is: D 上 =a1+D h1 D 下 =D h1 -a2 The true horizontal slip of the two soil layers in the ground fissure is: X=a1×tan α =a2×tan β It can be seen from this that the vertical dislocation caused by the horizontal displacement of the uneven strata has the following relationship: a1+a2=L a -L b =D 上 -D 下 , a1 / a2=tan α / tan β Calculate a1 and a2 separately: 。 5. A system for determining ground fissure activity based on stratum thickness changes, for implementing the method for determining ground fissure activity based on stratum thickness changes according to any one of claims 1 to 4, characterized in that: It includes a data acquisition module, a data processing module and a data output module. The data acquisition module is used to measure the relevant parameters of the corresponding ground fissure for each stratum, and the data processing module is used to calculate the true vertical activity D of each stratum. h , the actual vertical activity of the ground fissures and the actual horizontal activity of the ground fissures.

6. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method for determining the amount of ground fissure activity based on changes in stratum thickness according to any one of claims 1 to 4 are implemented.

7. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for determining the amount of ground fissure activity based on changes in stratum thickness according to any one of claims 1 to 4 are implemented.

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