CN114048538A - Method and system for evaluating instability area amplification effect of foundation pit excavation slope - Google Patents
Method and system for evaluating instability area amplification effect of foundation pit excavation slope Download PDFInfo
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Abstract
The invention belongs to the technical field of geotechnical engineering safety evaluation and instability risk quantification, and discloses a method and a system for evaluating an amplification effect of an instability area of a foundation pit excavation slope, wherein the system for evaluating the amplification effect of the instability area of the foundation pit excavation slope comprises the following steps: the device comprises a data acquisition module, a strength reduction simulation module, a seismic action simulation module, a wireless communication module, a central control module, a slope instability area calculation module, an evaluation model construction module, an amplification effect evaluation module, a data storage module and an updating display module. The system for evaluating the amplification effect of the instability area of the foundation pit excavation slope provided by the invention has the advantages that the calculation process is reasonable, the efficiency is far higher than that of the risk evaluation of the foundation pit excavation slope under the earthquake action by a power time course method in the prior art, the amplification effect of the instability area of the foundation pit excavation slope under the earthquake action can be reasonably, effectively and quickly obtained, and the safety evaluation of geotechnical engineering can be accurately and effectively carried out.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering safety evaluation and instability risk quantification, and particularly relates to a method and a system for evaluating an amplification effect of an instability area of a foundation pit excavation slope.
Background
At present, the instability of the foundation pit slope is one of the main risk factors influencing the construction of the building engineering in China. The instability of the foundation pit slope not only affects the construction progress of the building, disturbs the construction plan and increases the construction cost, but also seriously threatens the life safety of the construction personnel. According to statistics, the accident of instability of the side slope of the foundation pit often caused under the action of earthquake is an important influence factor of instability of the side slope in the excavation process of the foundation pit. Therefore, it is important to accurately and reliably evaluate the instability risk of the foundation pit slope under the action of the earthquake and to take effective measures to avoid foundation pit collapse. In the field of evaluation of foundation pit slope instability risks, a limit balance method, a finite element strength reduction method and a limit analysis method are generally adopted to quantify the instability area of the foundation pit slope, the instability area corresponding to the minimum safety factor is determined through different search mechanisms, and the instability area index is utilized to evaluate the foundation pit slope instability risks. However, for the foundation pit excavation slope which must consider the earthquake action, the risk assessment is generally carried out by a dynamic time course method, and the calculation process is complex and time-consuming. Therefore, an assessment method for the instability area amplification effect of the foundation pit excavation slope capable of reasonably and effectively considering the earthquake action is indispensable.
Through the above analysis, the problems and defects of the prior art are as follows: for the foundation pit excavation slope with the earthquake action needing to be considered, the calculation process is complex and time-consuming and huge when risk assessment is carried out.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method and a system for evaluating the amplification effect of the instability area of a foundation pit excavation slope.
The invention is realized in the process that a system for evaluating the amplification effect of the instability area of the foundation pit excavation slope comprises the following steps:
the data acquisition module is connected with the central control module and used for collecting data and acquiring foundation pit excavation slope data through remote sensing image interpretation, field investigation and historical data research methods;
the central control module is connected with the data acquisition module, the slope instability area calculation module, the evaluation model construction module and the amplification effect evaluation module and is used for coordinating and controlling the normal operation of each module of the system for evaluating the amplification effect of the slope instability area of the foundation pit excavation through a central processing unit;
the slope instability area calculation module is connected with the central control module and used for calculating the amplitude value of the intensity reduction effect and the earthquake action effect on the foundation pit excavation slope according to the acquired intensity reduction simulation data and earthquake action simulation data through a calculation program;
the assessment model building module is connected with the central control module and used for building a foundation pit excavation slope instability area amplification effect assessment model according to the acquired foundation pit excavation slope data through a model building program, and the assessment model building module comprises:
grading the foundation pit according to a method that the depth is deeper when the number of grades is larger to obtain foundation pits with different depth grades;
establishing a foundation pit safety coefficient model; calculating the safety coefficient of the ultra-deep foundation pit under the conditions of different depth levels by using the foundation pit safety coefficient model;
calculating the safety coefficient ratio of the foundation pit to be evaluated relative to the foundation pit of the first depth grade according to the obtained safety coefficients of the foundation pits of the different depth grades;
taking the safety coefficient ratio as a risk depth amplification coefficient of the ultra-deep foundation pit, and establishing a foundation pit excavation slope instability area amplification effect evaluation model based on the risk depth amplification coefficient:
R(A)＝Ej*R(D)+R(G)+R(E)+R(S)；
wherein R (A) is the total risk of the foundation pit; ejThe risk depth amplification coefficient of the ultra-deep foundation pit is shown, and j is a natural number; r (D) is foundation pit depth risk; r (G) is foundation pit geological risk; r (E) is foundation pit environment risk; r (S) is the risk of the foundation pit structure;
and the amplification effect evaluation module is connected with the central control module and is used for evaluating the amplification effect of the instability area of the foundation pit excavation slope by utilizing the constructed instability area amplification effect evaluation model of the foundation pit excavation slope through an evaluation program.
Further, the system for evaluating the amplification effect of the unstable area of the foundation pit excavation slope further comprises:
the strength reduction simulation module is connected with the central control module and used for simulating the strength reduction effect through the strength reduction simulation device and acquiring strength reduction simulation data;
the earthquake action simulation module is connected with the central control module and used for simulating the earthquake action effect through the earthquake simulation device and acquiring earthquake action simulation data;
the wireless communication module is connected with the central control module and used for sending the acquired foundation pit excavation slope data, the acquired intensity reduction simulation data and the acquired seismic action simulation data to the central processing unit through the wireless communication device;
the central control module is connected with the strength reduction simulation module, the earthquake action simulation module, the wireless communication module, the data storage module and the updating display module and is used for coordinating and controlling the normal operation of each module of the system for evaluating the instability area amplification effect of the foundation pit excavation slope through a central processing unit;
the data storage module is connected with the central control module and used for storing the obtained foundation pit excavation slope data, the obtained intensity reduction simulation data, the obtained earthquake action simulation data, the obtained slope instability area, the obtained foundation pit excavation slope instability area amplification effect evaluation model and the obtained foundation pit amplification effect evaluation result;
and the updating display module is connected with the central control module and is used for updating and displaying the acquired foundation pit excavation slope data, the strength reduction simulation data, the earthquake action simulation data, the slope instability area, the foundation pit excavation slope instability area amplification effect evaluation model and the real-time data of the foundation pit amplification effect evaluation result through the display.
Further, in the intensity reduction simulation module, the simulating the intensity reduction effect by the intensity reduction simulation apparatus includes:
(1) establishing a geometric model of a foundation pit excavation side slope, and acquiring mechanical parameters of an original soil layer according to a geological survey report; when the horizontal earthquake acceleration value is zero, calculating the safety coefficient of the foundation pit excavation side slope by using a simplified Bishou method in the extreme balance method;
(2) selecting a reduction coefficient, and reducing the mechanical parameters cohesive force and the internal friction angle of the original soil layer to obtain new mechanical parameters cohesive force and the internal friction angle of the soil layer if the reduction coefficient is greater than zero;
(3) and based on new soil layer mechanical parameters, when the horizontal earthquake acceleration value is zero, the minimum safety factor of the foundation pit excavation side slope is calculated by utilizing the simplified Bishou method in the extreme balance method again until the value is less than 1.
Further, the mechanical parameters of the original soil layer comprise the weight, cohesive force and internal friction angle of the original soil layer.
Further, the safety coefficient of the foundation pit excavation side slope under the original soil layer mechanical parameters is calculated by adjusting the horizontal seismic acceleration value and utilizing a simplified Bischo method in the limit balance method.
Further, in the slope destabilizing area calculation module, calculating an amplification value between the intensity reduction effect and the earthquake action effect according to the acquired intensity reduction simulation data and the earthquake action simulation data by the calculation program, including:
(1) simulating a corresponding displacement field when the minimum safety coefficient and the minimum safety coefficient value of the foundation pit excavation side slope are less than 1 by adopting a smooth particle fluid dynamics method;
(2) setting a critical value, and respectively counting the sliding area of the foundation pit excavation slope and the sliding area of the foundation pit excavation slope based on the displacement field; (ii) a
(3) And respectively calculating the amplitude increasing values of the strength reduction effect and the earthquake action effect on the foundation pit excavation slope based on the foundation pit excavation slope sliding area and the foundation pit excavation slope sliding area.
Further, in the evaluation model building module, the foundation pit safety coefficient model is as follows:
wherein, FsThe safety factor of the foundation pit; w is foundation pit outer wedgeThe weight of the shaped soil mass; alpha is the included angle between the sliding surface of the wedge-shaped soil body outside the foundation pit and the vertical direction;
the average internal friction angle of the wedge-shaped soil body outside the foundation pit is shown; c is the average cohesive force of the wedge-shaped soil outside the foundation pit; l is the length of the wedge-shaped soil body sliding surface outside the foundation pit.
It is another object of the present invention to provide a computer program product stored on a computer readable medium, comprising a computer readable program for providing a user input interface for applying the system for evaluating the effect of amplifying an unstable area of an excavation slope of a foundation pit when the computer program product is executed on an electronic device.
It is another object of the present invention to provide a computer readable storage medium storing instructions that, when executed on a computer, cause the computer to apply the system for evaluating an effect of augmentation of an excavation slope instability area of a foundation pit.
Another object of the present invention is to provide an information data processing terminal, wherein the information data processing terminal is used for implementing the system for evaluating the amplification effect of the foundation pit excavation slope instability area.
By combining all the technical schemes, the invention has the advantages and positive effects that: the system for evaluating the amplification effect of the instability area of the foundation pit excavation slope provided by the invention has the advantages that the calculation process is reasonable, the efficiency is far higher than that of the risk evaluation of the foundation pit excavation slope under the earthquake action in the prior art, the amplification effect of the instability area of the foundation pit excavation slope under the earthquake action can be reasonably, effectively and quickly calculated, and the amplification effect of the instability area of the foundation pit excavation slope can be effectively evaluated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a structural diagram of a system for evaluating an amplification effect of a slope instability area of foundation pit excavation according to an embodiment of the present invention;
in the figure: 1. a data acquisition module; 2. a strength reduction simulation module; 3. a seismic action simulation module; 4. a wireless communication module; 5. a central control module; 6. a slope instability area calculation module; 7. an evaluation model construction module; 8. an amplification effect evaluation module; 9. a data storage module; 10. and updating the display module.
Fig. 2 is a flowchart of a method for evaluating an effect of amplifying a destabilized area of a foundation pit excavation slope according to an embodiment of the invention.
Fig. 3 is a flowchart of a method for simulating an intensity reduction effect by an intensity reduction simulation module using an intensity reduction simulation apparatus according to an embodiment of the present invention.
Fig. 4 is a flowchart of a method for calculating, by a slope destabilizing area calculation module, a foundation pit excavation slope sliding area and a foundation pit excavation slope sliding area based on the obtained intensity reduction simulation data and seismic action simulation data by using a calculation program, and calculating an increase value of an intensity reduction effect and a seismic action effect on a foundation pit excavation slope, respectively, according to the embodiment of the present invention. Fig. 5 is a flowchart of a method for constructing a foundation pit excavation slope instability area amplification effect evaluation model according to the acquired foundation pit excavation slope data by using a model construction program through an evaluation model construction module according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Aiming at the problems in the prior art, the invention provides a method and a system for evaluating the amplification effect of the unstable area of the foundation pit excavation slope, and the invention is described in detail below by combining the attached drawings.
As shown in fig. 1, a system for evaluating an effect of amplifying an unstable area of a foundation pit excavation slope according to an embodiment of the present invention includes: the earthquake-resistant monitoring system comprises a data acquisition module 1, a strength reduction simulation module 2, an earthquake action simulation module 3, a wireless communication module 4, a central control module 5, a slope instability area calculation module 6, an evaluation model construction module 7, an amplification effect evaluation module 8, a data storage module 9 and an update display module 10.
The data acquisition module 1 is connected with the central control module 5 and used for collecting data and acquiring foundation pit excavation slope data through remote sensing image interpretation, field investigation and historical data research methods;
the strength reduction simulation module 2 is connected with the central control module 5 and used for simulating the strength reduction effect through a strength reduction simulation device and acquiring strength reduction simulation data;
the earthquake action simulation module 3 is connected with the central control module 5 and used for simulating the earthquake action effect through the earthquake simulation device and acquiring earthquake action simulation data;
the wireless communication module 4 is connected with the central control module 5 and used for sending the acquired foundation pit excavation slope data, the strength reduction simulation data and the seismic action simulation data to the central processing unit through a wireless communication device;
the central control module 5 is connected with the data acquisition module 1, the strength reduction simulation module 2, the earthquake action simulation module 3, the wireless communication module 4, the slope instability area calculation module 6, the evaluation model construction module 7, the amplification effect evaluation module 8, the data storage module 9 and the updating display module 10, and is used for coordinating and controlling the normal operation of each module of the system for evaluating the amplification effect of the slope instability area of foundation pit excavation through a central processing unit;
the slope instability area calculation module 6 is connected with the central control module 5 and used for calculating the amplification values of the intensity reduction effect and the earthquake action effect on the foundation pit excavation slope respectively according to the acquired intensity reduction simulation data and earthquake action simulation data through a calculation program;
the evaluation model building module 7 is connected with the central control module 5 and used for building a foundation pit excavation slope instability area amplification effect evaluation model according to the acquired foundation pit excavation slope data through a model building program;
the amplification effect evaluation module 8 is connected with the central control module 5 and is used for evaluating the amplification effect of the instability area of the foundation pit excavation slope by utilizing the constructed instability area amplification effect evaluation model of the foundation pit excavation slope through an evaluation program;
the data storage module 9 is connected with the central control module 5 and used for storing the obtained foundation pit excavation slope data, the strength reduction simulation data, the earthquake action simulation data, the slope instability area, the foundation pit excavation slope instability area amplification effect evaluation model and the foundation pit amplification effect evaluation result through a memory;
and the updating display module 10 is connected with the central control module 5 and is used for updating and displaying the acquired foundation pit excavation slope data, the strength reduction simulation data, the earthquake action simulation data, the slope instability area, the foundation pit excavation slope instability area amplification effect evaluation model and the real-time data of the foundation pit amplification effect evaluation result through a display.
As shown in fig. 2, the method for evaluating the effect of amplifying the unstable area of the excavation slope of the foundation pit provided by the embodiment of the invention includes the following steps:
s101, collecting data and acquiring foundation pit excavation slope data by using a remote sensing image interpretation, field investigation and historical data research method through a data acquisition module;
s102, simulating an intensity reduction effect by using an intensity reduction simulation device through an intensity reduction simulation module, and acquiring intensity reduction simulation data; simulating the earthquake action effect by using an earthquake simulation device through an earthquake action simulation module, and acquiring earthquake action simulation data;
s103, sending the obtained foundation pit excavation slope data, the obtained intensity reduction simulation data and the obtained earthquake action simulation data to a central processing unit by using a wireless communication device through a wireless communication module;
s104, the central control module utilizes the central processing unit to coordinate and control the normal operation of each module of the system for evaluating the instability area amplification effect of the foundation pit excavation slope;
s105, respectively calculating the amplitude values of the intensity reduction effect and the earthquake action effect on the foundation pit excavation side slope according to the acquired intensity reduction simulation data and earthquake action simulation data by using a calculation program through a side slope instability area calculation module;
s106, constructing a foundation pit excavation slope instability area amplification effect evaluation model according to the acquired foundation pit excavation slope data by using a model construction program through an evaluation model construction module;
s107, carrying out foundation pit excavation slope instability area amplification effect evaluation by using the foundation pit excavation slope instability area amplification effect evaluation model obtained by construction through an amplification effect evaluation module by using an evaluation program;
s108, storing the obtained foundation pit excavation slope data, the strength reduction simulation data, the earthquake action simulation data, the slope instability area, the foundation pit excavation slope instability area amplification effect evaluation model and the foundation pit amplification effect evaluation result by using a memory through a data storage module;
and S109, updating and displaying the acquired foundation pit excavation slope data, the strength reduction simulation data, the seismic action simulation data, the slope instability area, the foundation pit excavation slope instability area amplification effect evaluation model and the real-time data of the foundation pit amplification effect evaluation result by using the display through the updating and displaying module.
As shown in fig. 3, in step S102, the simulating the intensity reduction effect by the intensity reduction simulating module using the intensity reduction simulating apparatus according to the embodiment of the present invention includes:
s201, establishing a geometric model of a foundation pit excavation slope, and acquiring mechanical parameters of an original soil layer according to a geological survey report; when the horizontal earthquake acceleration value is zero, calculating the safety coefficient of the foundation pit excavation side slope by using a simplified Bishou method in the extreme balance method;
s202, selecting a reduction coefficient, and reducing the mechanical parameter cohesive force and the internal friction angle of the original soil layer to obtain a new soil layer mechanical parameter cohesive force and a new internal friction angle if the reduction coefficient is larger than zero;
s203, based on new soil layer mechanical parameters, when the horizontal earthquake acceleration value is zero, the minimum safety coefficient of the foundation pit excavation side slope is calculated by the simplified Bischopper method in the limit balance method until the value is smaller than 1.
In step S201 provided by the embodiment of the present invention, the mechanical parameters of the original soil layer include the weight, cohesive force, and internal friction angle of the original soil layer.
In step S201 provided by the embodiment of the present invention, a safety factor of the foundation pit excavation slope under the original soil layer mechanical parameters is calculated by adjusting the horizontal seismic acceleration value and using a simplified bizodiac method in the limit balance method.
As shown in fig. 4, in step S105 provided in this embodiment of the present invention, the calculating, by the slope unstable area calculating module, an amplitude value of the intensity reduction effect and the seismic effect on the excavation slope of the foundation pit according to the obtained intensity reduction simulation data and seismic effect simulation data by using a calculation program includes:
s301: simulating a corresponding displacement field when the minimum safety coefficient and the minimum safety coefficient value of the foundation pit excavation side slope are less than 1 by adopting a smooth particle fluid dynamics method;
s302: setting a critical value, and respectively counting the sliding area of the foundation pit excavation slope and the sliding area of the foundation pit excavation slope based on the displacement field;
s303: and respectively calculating the amplitude increasing values of the strength reduction effect and the earthquake action effect on the foundation pit excavation slope based on the foundation pit excavation slope sliding area and the foundation pit excavation slope sliding area.
As shown in fig. 5, in step S106 provided in the embodiment of the present invention, the building, by the evaluation model building module, a foundation pit excavation slope instability area amplification effect evaluation model according to the obtained foundation pit excavation slope data by using a model building program includes:
s401, grading the foundation pit according to a method that the depth is deeper when the grade is larger, and obtaining foundation pits with different grades of depth;
s402, establishing a foundation pit safety coefficient model; calculating the safety coefficient of the ultra-deep foundation pit under the conditions of different depth levels by using the foundation pit safety coefficient model;
s403, calculating a safety coefficient ratio of the foundation pit to be evaluated relative to the foundation pit of the first depth level according to the obtained safety coefficients of the foundation pits of the different depth levels;
s404, taking the safety coefficient ratio as a risk depth amplification coefficient of the ultra-deep foundation pit, and establishing a foundation pit excavation slope instability area amplification effect evaluation model based on the risk depth amplification coefficient.
In step S402 provided in the embodiment of the present invention, the foundation pit safety factor model is:
wherein, FsThe safety factor of the foundation pit; w is the weight of the wedge-shaped soil outside the foundation pit; alpha is the included angle between the sliding surface of the wedge-shaped soil body outside the foundation pit and the vertical direction;
the average internal friction angle of the wedge-shaped soil body outside the foundation pit is shown; c is the average cohesive force of the wedge-shaped soil outside the foundation pit; l is the length of the wedge-shaped soil body sliding surface outside the foundation pit.
In step S404 provided in the embodiment of the present invention, the foundation pit excavation slope instability area amplification effect evaluation model is:
R(A)＝Ej*R(D)+R(G)+R(E)+R(S)；
wherein R (A) is the total risk of the foundation pit; ejThe risk depth amplification coefficient of the ultra-deep foundation pit is shown, and j is a natural number; r (D) is foundation pit depth risk; r (G) is foundation pit geological risk; r (E) is foundation pit environment risk; r (S) is the risk of the foundation pit structure.
In the above embodiments, this may be implemented in whole or in part by software, hardware, firmware, or any combination thereof (not explicitly stated). When used in whole or in part, can be implemented in a computer program product that includes one or more computer instructions. When loaded or executed on a computer, cause the flow or functions according to embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL), or wireless (e.g., infrared, wireless, microwave, etc.)). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that includes one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A system for assessing the effect of amplifying the unstable area of a foundation pit excavation slope, the system comprising:
the data acquisition module is connected with the central control module and used for collecting data and acquiring foundation pit excavation slope data through remote sensing image interpretation, field investigation and historical data research methods;
the central control module is connected with the data acquisition module, the slope instability area calculation module, the evaluation model construction module and the amplification effect evaluation module and is used for coordinating and controlling the normal operation of each module of the system for evaluating the amplification effect of the slope instability area of the foundation pit excavation through a central processing unit;
the slope instability area calculation module is connected with the central control module and used for calculating the amplitude value of the intensity reduction effect and the earthquake action effect on the foundation pit excavation slope according to the acquired intensity reduction simulation data and earthquake action simulation data through a calculation program;
the assessment model building module is connected with the central control module and used for building a foundation pit excavation slope instability area amplification effect assessment model according to the acquired foundation pit excavation slope data through a model building program, and the assessment model building module comprises:
grading the foundation pit according to a method that the depth is deeper when the number of grades is larger to obtain foundation pits with different depth grades;
establishing a foundation pit safety coefficient model; calculating the safety coefficient of the ultra-deep foundation pit under the conditions of different depth levels by using the foundation pit safety coefficient model;
calculating the safety coefficient ratio of the foundation pit to be evaluated relative to the foundation pit of the first depth grade according to the obtained safety coefficients of the foundation pits of the different depth grades;
taking the safety coefficient ratio as a risk depth amplification coefficient of the ultra-deep foundation pit, and establishing a foundation pit excavation slope instability area amplification effect evaluation model based on the risk depth amplification coefficient:
R(A)＝Ej*R(D)+R(G)+R(E)+R(S)；
wherein R (A) is the total risk of the foundation pit; ejThe risk depth amplification coefficient of the ultra-deep foundation pit is shown, and j is a natural number; r (D) is foundation pit depth risk; r (G) is foundation pit geological risk; r (E) is foundation pit environment risk; r (S) is the risk of the foundation pit structure;
and the amplification effect evaluation module is connected with the central control module and is used for evaluating the amplification effect of the instability area of the foundation pit excavation slope by utilizing the constructed instability area amplification effect evaluation model of the foundation pit excavation slope through an evaluation program.
2. The system for evaluating the effect of amplifying an area of a pit excavation slope instability as recited in claim 1, wherein the system for evaluating the effect of amplifying an area of a pit excavation slope instability further comprises:
the strength reduction simulation module is connected with the central control module and used for simulating the strength reduction effect through the strength reduction simulation device and acquiring strength reduction simulation data;
the earthquake action simulation module is connected with the central control module and used for simulating the earthquake action effect through the earthquake simulation device and acquiring earthquake action simulation data;
the wireless communication module is connected with the central control module and used for sending the acquired foundation pit excavation slope data, the acquired intensity reduction simulation data and the acquired seismic action simulation data to the central processing unit through the wireless communication device;
the central control module is connected with the strength reduction simulation module, the earthquake action simulation module, the wireless communication module, the data storage module and the updating display module and is used for coordinating and controlling the normal operation of each module of the system for evaluating the instability area amplification effect of the foundation pit excavation slope through a central processing unit;
the data storage module is connected with the central control module and used for storing the obtained foundation pit excavation slope data, the obtained intensity reduction simulation data, the obtained earthquake action simulation data, the obtained slope instability area, the obtained foundation pit excavation slope instability area amplification effect evaluation model and the obtained foundation pit amplification effect evaluation result;
and the updating display module is connected with the central control module and is used for updating and displaying the acquired foundation pit excavation slope data, the strength reduction simulation data, the earthquake action simulation data, the slope instability area, the foundation pit excavation slope instability area amplification effect evaluation model and the real-time data of the foundation pit amplification effect evaluation result through the display.
3. The system for evaluating the effect of enlarging the unstable area of the excavation slope of the foundation pit according to claim 2, wherein the simulation of the effect of the intensity reduction by the intensity reduction simulation means in the intensity reduction simulation module comprises:
(1) establishing a geometric model of a foundation pit excavation side slope, and acquiring mechanical parameters of an original soil layer according to a geological survey report; when the horizontal earthquake acceleration value is zero, calculating the safety coefficient of the foundation pit excavation side slope by using a simplified Bishou method in the extreme balance method;
(2) selecting a reduction coefficient, and reducing the mechanical parameters cohesive force and the internal friction angle of the original soil layer to obtain new mechanical parameters cohesive force and the internal friction angle of the soil layer if the reduction coefficient is greater than zero;
(3) and based on new soil layer mechanical parameters, when the horizontal earthquake acceleration value is zero, calculating the minimum safety factor of the foundation pit excavation side slope by using a simplified Bischopper method in the extreme balance method until the value is less than 1.
4. The system for evaluating the effect of foundation pit excavation slope destabilization area enlargement according to claim 3, wherein the mechanical parameters of the original soil layer comprise the gravity, cohesion and internal friction angle of the original soil layer.
5. The system for evaluating the effect of enlargement of the unstable area of the excavation slope of the foundation pit according to claim 3, wherein the safety factor of the excavation slope of the foundation pit under the original soil layer mechanical parameters is calculated by using a simplified Bischot method in a limit balance method by adjusting the horizontal seismic acceleration value.
6. The system for evaluating the effect of amplifying the unstable area of the excavation slope of the foundation pit according to claim 1, wherein in the calculation module for the unstable area of the foundation pit, the calculation of the magnitude of the increase of the effect of the reduction of intensity and the effect of the earthquake on the excavation slope of the foundation pit according to the obtained simulation data of the reduction of intensity and the simulation data of the earthquake action by the calculation program comprises:
(1) simulating a corresponding displacement field when the minimum safety coefficient and the minimum safety coefficient value of the foundation pit excavation side slope are less than 1 by adopting a smooth particle fluid dynamics method;
(2) setting a critical value, and respectively counting the sliding area of the foundation pit excavation slope and the sliding area of the foundation pit excavation slope based on the displacement field;
(3) and respectively calculating the amplitude increasing values of the strength reduction effect and the earthquake action effect on the foundation pit excavation slope based on the foundation pit excavation slope sliding area and the foundation pit excavation slope sliding area.
7. The system for evaluating the effect of enlarging the unstable area of the excavation slope of the foundation pit according to claim 1, wherein in the evaluation model building module, the foundation pit safety coefficient model is:
wherein, FsThe safety factor of the foundation pit; w is the weight of the wedge-shaped soil outside the foundation pit; alpha is the included angle between the sliding surface of the wedge-shaped soil body outside the foundation pit and the vertical direction;
the average internal friction angle of the wedge-shaped soil body outside the foundation pit is shown; c is the average cohesive force of the wedge-shaped soil outside the foundation pit; l is the length of the wedge-shaped soil body sliding surface outside the foundation pit.
8. A computer program product stored on a computer readable medium, comprising a computer readable program for providing a user input interface for applying the system for evaluating an effect of an enlargement of a destabilizing area of an excavation slope according to any of claims 1-7 when executed on an electronic device.
9. A computer readable storage medium storing instructions which, when executed on a computer, cause the computer to apply the system for assessing the effect of amplifying an area of instability in an excavation slope of a foundation pit according to any one of claims 1 to 7.
10. An information data processing terminal, characterized in that the information data processing terminal is used for realizing the system for evaluating the amplification effect of the instability area of the foundation pit excavation slope according to any one of claims 1 to 7.
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