Ground fracture activity determination method, system and equipment based on formation thickness change and storage medium

Abstract

The invention relates to the technical field of geological disaster prevention, in particular to a ground fracture activity amount determination method, system and device based on stratum thickness variation and a storage medium, and the method comprises the following steps: S1, determining the position of a ground fracture in each stratum; s2, for each stratum, measuring relevant parameters of a ground fracture corresponding to the stratum; s3, for each stratum, the real vertical activity Dh of each stratum is obtained by using the corresponding upper boundary included angle alpha, the corresponding lower boundary included angle beta and the corresponding section apparent staggered distance D < upper > and D < lower >; s4, acquiring the real vertical activity amount of the ground fracture; and S5, obtaining the real horizontal activity amount of the ground fracture. According to the method, the vertical and horizontal activity values of the ground fracture can be accurately and efficiently determined, the profile offset difference caused by the thickness change of the stratum is eliminated, and inclined stratums of various angles can be directly calculated.

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 the amount of ground fissure activity based on changes in stratum thickness. Background Art

[0002] During the formation and expansion of ground fissures, the natural structure of the soil is destroyed, and disasters such as cracking of overlying buildings, deformation of roads, and damage to pipelines are caused, which seriously endangers the daily life of people. The primary factor in carrying out various engineering activities at ground fissure sites is to find out their activity characteristics, so as to provide a theoretical basis and accurate parameters for the prevention and control of the disaster and engineering defense. Since the causes of ground fissures are controlled by many factors, they are controlled by hidden faults, regional stress field tension, and groundwater settlement, forming three types of movement components, namely horizontal tension, strike-slip dislocation, and vertical dislocation.

[0003] At present, the determination of ground fissure activity mostly relies on ground deformation monitoring or geological drilling stratum macroscopic analysis. Since some ground fissures move slowly and at uneven rates, it is difficult for surface monitoring to truly reflect them; and the macroscopic analysis of geological drilling can only infer the vertical offset of the ground fissures, but cannot reflect the components in the other two directions.

[0004] Existing technologies cannot directly obtain the horizontal and vertical true displacement of strata at different depths of ground fissures, and the estimation of ground fissure activity is not accurate enough, which brings uncertainty to disaster prevention and mitigation work at ground fissure sites. Therefore, it is necessary to study a method that can accurately calculate the horizontal and vertical activity of ground fissures, so as to provide accurate basic values ​​for subsequent research on ground fissures and engineering defense. Summary of the invention

[0005] In view of the problem in the prior art that the horizontal and vertical true displacements of the bottom layers of the ground fissures at different depths cannot be directly obtained, resulting in low accuracy in estimating the activity of the ground fissures, the present invention provides a method, system, device and storage medium for determining the activity of the ground fissures based on changes in stratum thickness.

[0006] The present invention is achieved through the following technical solutions: A method for determining the amount of ground fissure activity based on changes in stratum thickness comprises the following steps: S1, excavate deep trenches according to the specifications and site conditions, perform leveling, surface cleaning and bottom stratification, and determine the location of ground fissures in each stratum; S2, for each stratum, measure the relevant parameters of the corresponding ground fissures, including the apparent offset D of the main bottom layer profile 上 and D 下 , the elevation of the upper and lower interfaces of the two soil plates, the direction of the ground fissure, the width of the exploration trench H, and the angle between the upper boundaries of the main strata on the two walls of the exploration trench α , the angle of the lower boundaryβ ; S3, for each stratum, using its corresponding upper limit angle α , the angle between the lower boundary β And the apparent misalignment D 上 and D 下 , obtain the true vertical activity D of the stratum h ; S4, based on the actual vertical activity of the stratum D h Get the vertical activity D of the ground fissure H ; S5, obtaining the actual horizontal activity amount of the ground fissure according to the vertical activity amount of the ground fissure.

[0007] Preferably, in S2, the angle α and angle β Obtained using a level or elevation calculation.

[0008] Preferably, in S3, the true vertical activity D h Including the upper limit of the true vertical activity D h1 The true vertical activity D of the lower boundary h2 .

[0009] 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: The actual vertical movement of the two plates of soil in the ground fissure is: D h1 =D h2 The formation offset 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 that the vertical dislocation caused by the horizontal displacement of 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:

[0010] .

[0011] Preferably, in S4, the actual vertical activity of the ground fissures is obtained on the premise that the strata satisfy the uniform distribution assumption.

[0012] Preferably, 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: .

[0013] Preferably, the calculation formula for the actual horizontal activity X of the ground fissure is: .

[0014] A system for determining the amount of ground fissure activity based on the change of 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 amount D of each stratum. h , the true vertical activity of the ground fissures and the true horizontal activity of the ground fissures.

[0015] An electronic device comprises a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the method for determining the amount of ground fissure activity based on changes in stratum thickness when executing the computer program.

[0016] 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.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a method for determining the amount of ground fissure activity based on the change in stratum thickness, which further improves and innovates the method for calculating the actual amount of ground fissure activity, so that the method is not limited to a single engineering site, and further optimizes the calculation method, so that the calculation method is not limited to a specific bottom horizontal stratum, and can be applied to most inclined strata. The present invention improves the inaccurate estimation of vertical dislocation in previous years of ground fissure exploration work, and uses the apparent stratum dislocation of the exploration trench to calculate the actual amount of vertical and horizontal activity of ground fissures, which can accurately and efficiently determine the amount of ground fissure activity in a certain area, providing reliable basic data for subsequent research and engineering, and at the same time, it is of great significance to calculate the activity rate of ground fissures and determine the active period, and solves the problems existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a flow chart of a method for determining the amount of ground fissure activity based on changes in stratum thickness according to the present invention; Figure 2 A schematic diagram of the strata dislocation on both sides of the ground fissure proposed by the present invention; Figure 3 A schematic diagram for calculating the apparent vertical activity of ground fissures proposed by the present invention; Figure 4 2 is a cross-sectional view of a trench according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0020] The present invention discloses a method for determining the amount of ground fissure activity based on the change of stratum thickness, referring to Figure 1 , including the following steps: S1. According to the specifications and site conditions, deep trenches are excavated, and leveling, surface cleaning and bottom-layer description are carried out to determine the location of ground fissures in each stratum. Specifically, in accordance with the "Geotechnical Engineering Investigation Specification GB50021-2001 (2009 Edition)" and "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.

[0021] S2, for each stratum, measure the relevant parameters of the corresponding ground fissures, including the apparent offset D of the main bottom layer profile 上 and D 下 , the elevation of the upper and lower interfaces of the two soil plates, the width H of the exploration trench in the direction of the ground fissure, the angle α of the upper boundary of the main strata on the two walls of the exploration trench, and the angle β of the lower boundary. Among them, the angle α and the angle β are obtained by using a level or elevation calculation.

[0022] 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 upper limit of the true vertical activity D h1 The true vertical activity D of the lower boundary h2 .

[0023] True vertical activity D h The calculation process is as follows: The actual vertical movement of the two plates of soil in the ground fissure is: D h1 =Dh2 ; The true horizontal slip of the two soil layers in the ground fissure is: X = a1 × tanα = a2 × tanβ; The formation offset directly measured by the trench profile is: D 上 =a1+D h1 ; D 下 =D h1 -a2; It can be seen that the vertical dislocation caused by the horizontal displacement of uneven strata has the following relationship: a1+a2=L a -L b =D 上 -D 下 a1 / a2=tanα / tanβ Calculate a1 and a2 separately:

[0024] , a1, a2, L a , L b is the difference in the calculation process.

[0025] S4, based on the actual vertical activity of the stratum D h Get the vertical activity D of the ground fissure H Specifically, the actual vertical activity of the ground fissures is obtained based on the premise that the strata satisfy the uniform distribution assumption. The calculation formula for the actual vertical activity of the ground fissures is: .

[0026] S5, according to the vertical activity of the ground fissure, the actual horizontal activity of the ground fissure is obtained, and the calculation formula is: .

[0027] The method for determining the amount of ground fissure activity based on the change of stratum thickness of the present invention can more accurately determine the amount of ground fissure activity based on the change of stratum thickness, and provide a scientific basis for the monitoring, early warning and management of ground fissures. Specifically, firstly, according to 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 flattened and cleaned to remove the surface loose soil and impurities, so as 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 measure the apparent misalignment D of the upper and lower interfaces of the main strata. 上 and D 下, a calculation model is established based on the relationship between the change of stratum thickness and the activity of ground fissures. The model should take into account the upper limit angle α , the angle between the lower boundary β And the apparent misalignment 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.

[0028] Reference Figure 2 , 3 , 4, Figure 4 The scale is 1:50. Taking a ground fissure as an example, the activity of the strata (L5 silty clay and L13 clay) is calculated according to the method for determining the activity of the ground fissure based on the change of strata thickness proposed by the present invention. The specific process is as follows: 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.

[0029] S2, measure the apparent offset of the corresponding strata in the trench (as shown in Table 1), D 上-L5 =19.2cm, D 下-L5 =27.0cm, D 上-L13 =53.9cm, D 下-L13 =56.2cm; the bottom width of the exploration trench is 5m; the height difference of the upper dividing line of L5 is 0.217m, and the height difference of the lower dividing line is 0.193m; the height difference of the upper dividing line of L13 is 0.041m, and the height difference of the lower dividing line is 0.170m.

[0030] The inclination angle of the stratum is obtained based on the on-site measurement and indoor elevation verification. , , , .

[0031] Table 1 Related parameters of L5 silty clay and L13 clay

[0032] S3, based on the above calculation results, accurately calculate the distance distortion error caused by stratum dislocation according to the method proposed by the present invention: =-0.0413 =-0.0367 =-0.0044 =-0.0186 S4, judge whether the real dislocation is close, that is, judge whether D h1 ≈D h2 Is it established: =0.2332 =0.2332 =0.5439 =0.5439

[0033]

[0034] The upper and lower boundaries of strata L5 and L13 are close to each other, and the strata are evenly inclined.

[0035] Therefore, the true vertical activity of the ground fissure is calculated as: =0.2332 =0.5439 S5, after determining the true vertical activity of the ground fissures, calculate the true horizontal activity of the ground fissures: =0.0016 =0.0003 The present invention also discloses a system for determining the amount of ground fissure activity based on the change of 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 corresponding ground fissure for each stratum, and the data processing module is used to calculate the true vertical activity amount D of each stratum. h , the true vertical activity of the ground fissures and the true horizontal activity of the ground fissures.

[0036] 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.

[0037] The present invention also discloses a storage medium on which a computer program is stored, 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.

[0038] The above description is only 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 substitutions, and these modifications and substitutions 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 deep trenches according to the specifications and site conditions, perform leveling, surface cleaning and bottom stratification, and determine the location of ground fissures in each stratum; S2, for each stratum, measure the relevant parameters of the corresponding ground fissures, including the apparent offset D of the main bottom layer profile 上 and D 下 , the elevation of the upper and lower interfaces of the two soil plates, the direction of the ground fissure, the width of the exploration trench H, and the angle between the upper boundaries of the main strata on the two walls of the exploration trench α , the angle of the lower boundary β ; S3, for each stratum, using its corresponding upper limit angle α , the angle between the lower boundary β And the apparent misalignment D 上 and D 下 , obtain the true vertical activity D of the stratum h ; S4, based on the actual vertical activity of the stratum D h Get the vertical activity D of the ground fissure H ; S4, obtaining the actual horizontal activity amount of the ground fissure according to the vertical activity amount of the ground fissure.

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

4. The method for determining the amount of ground fissure activity based on stratum thickness change 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 actual vertical movement of the two plates of soil in the ground fissure is: D h1 =D h2 The formation offset 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 that the vertical dislocation caused by the horizontal displacement of uneven strata has the following relationship: a1+a2=L a -L b =D 上 -D 下 , where L a for <h2 style=";text-align:left;direction:ltr">a1 / a2=tan<h2 style=";text-align:left;direction:ltr"> α <h2 style=";text-align:left;direction:ltr"> / tan<h2 style=";text-align:left;direction:ltr"> β Calculate a1 and a2 separately: 。 5. The method for determining the amount of ground fissure activity based on changes in stratum thickness according to claim 4, characterized in that: In S4, the actual vertical activity of the ground fissures is obtained on the premise that the strata satisfy the uniform distribution assumption.

6. The method for determining the amount of ground fissure activity based on stratum thickness change according to claim 5, characterized in that: 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: 。 7. The method for determining the amount of ground fissure activity based on changes in stratum thickness according to claim 6, characterized in that: The calculation formula for the actual horizontal activity X of the ground fissure is: 。 8. A system for determining ground fissure activity based on changes in stratum thickness, 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 true vertical activity of the ground fissures and the true horizontal activity of the ground fissures.

9. 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 described in any one of claims 1 to 7 are implemented.

10. 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 7 are implemented.

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