Adaptability analysis and evaluation system for submarine pipeline directional drilling through soil layers

Abstract

The adaptability analysis and evaluation system for submarine pipeline directional drilling through soil layers provided by the present invention relates to the field of submarine pipeline engineering technology, and includes: a data processing module; the data processing module includes an adaptation analysis unit, a mechanical analysis unit, and a casing and support pile analysis unit, which respectively perform pipeline adaptation analysis, pipeline-seabed mechanical analysis, and casing and support pile mechanical analysis; the evaluation and optimization module comprehensively evaluates the adaptability of the soil layer according to the adaptation analysis results and the mechanical analysis results, outputs evaluation indicators, generates a visual report, and uses an intelligent algorithm to optimize the construction plan. The present invention can comprehensively consider the water area, soil layer information, and pipeline characteristics of the engineering area through the collaborative work of multiple modules. Compared with the traditional method of relying on experience and simple testing, it can more accurately evaluate the adaptability of the soil layer, provide a reliable basis for construction, and reduce the construction risks caused by inaccurate evaluation.

Description

Technical Field

[0001] The invention relates to the technical field of submarine pipeline engineering, and in particular to an adaptability analysis and evaluation system for submarine pipeline directional drilling through soil layers. Background Art

[0002] In the construction of submarine pipelines, directional drilling technology faces complex and changeable soil conditions. Different soil layers have significant differences in physical and mechanical properties, such as silt, silty clay, silty clay, etc. These differences will have a key impact on the pipeline force, drilling stability, and pull-back force during directional drilling construction.

[0003] Traditional construction design relies on experience and simple tests, lacking in systematization and precision. It cannot fully consider soil characteristics and the impact of the marine environment, and lacks the ability to simulate and evaluate complex situations, resulting in pipeline damage, drilling accidents, schedule delays and cost overruns during construction.

[0004] Therefore, it is necessary to propose an adaptability analysis and evaluation system for submarine pipeline directional drilling through soil layers to solve the above problems. Summary of the invention

[0005] The present invention provides a system for analyzing and evaluating the adaptability of submarine pipeline directional drilling through soil layers, which solves the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the present invention provides a system for analyzing and evaluating the adaptability of submarine pipeline directional drilling through soil layers, comprising:

[0007] The task identification module is used to read the construction plan, identify and mark the engineering area where the submarine pipeline needs to be directional drilled through the soil layer;

[0008] The information acquisition module is used to obtain the water area information and soil layer information of the project area and send it to the data storage module, and update the information in time series;

[0009] A data storage module, used for receiving and processing water area information and soil layer information of the project area, and building a soil layer-water area database;

[0010] The data processing module includes an adaptation analysis unit, a mechanical analysis unit, and a casing and support pile analysis unit, which respectively perform pipeline adaptation analysis, pipeline-seabed mechanical analysis, and casing and support pile mechanical analysis;

[0011] The evaluation and optimization module conducts a comprehensive evaluation of the soil adaptability in the project area based on the pipeline adaptation analysis results output by the adaptation analysis unit and the pipeline mechanical performance analysis results output by the mechanical analysis unit, and uses intelligent algorithms to optimize the construction plan.

[0012] Preferably, the data processing module includes an adaptation analysis unit, a mechanical analysis unit, and a casing and support pile analysis unit, which are specifically:

[0013] The adaptation analysis unit is used to input pipeline parameter information of different types of pipelines, including pipe diameter, wall thickness, material, compressive strength, and anti-corrosion performance, and establish a pipeline database; based on the information in the soil layer-water area database, the pipeline adaptation analysis is performed to analyze the requirements of different soil layers and water areas for pipeline performance, and the pipeline parameters in the pipeline database are matched with the soil layer-water area conditions. The fitness score of each pipeline and the soil layer and water area of ​​the project area is calculated by weighted summation, and the pipelines are sorted according to the fitness score. The set number of pipeline types with the highest fitness is output as the selected pipeline, and an analysis report corresponding to the selected pipeline is generated, including the preferred points of the pipeline, applicable scenarios, and the fitness score of the selected pipeline in the corresponding soil layer and water area of ​​the project area;

[0014] The mechanical analysis unit builds a pipeline-seabed nonlinear model based on the finite element algorithm combined with the soil layer information of the project area and the pipeline parameter information of the selected pipeline; simulates the stress distribution and deformation of the pipeline under the set entry and exit angle, obtains the specification requirements of the selected pipeline in the project area, and determines the maximum entry and exit angle of the pipeline that meets the specification requirements through iterative calculation and optimization algorithm;

[0015] The casing and supporting pile analysis unit is used to perform mechanical analysis on the casing and supporting piles. According to the specifications of the casing, supporting piles and the spacing arrangement of the supporting piles, combined with the ocean current and wave loads, the vortex-induced vibration response of the casing is analyzed, and the downstream natural frequency and the lateral natural frequency are calculated. By comparing the downstream natural frequency and the lateral natural frequency with their expected frequencies, it is determined whether the casing and supporting piles meet the vibration safety requirements.

[0016] Preferably, the information acquisition module establishes a data transmission link with a number of ocean monitoring stations and buoys distributed in and around the target sea area where the pipeline is pre-laid, and acquires water area information of the project area in real time.

[0017] Preferably, the water area information of the engineering area includes current velocity, flow direction, wave parameters, water level changes, seawater temperature, and salinity; the soil layer information of the engineering area includes rock and soil number, rock and soil name, water content, gravity density, porosity, liquid limit, plastic limit, permeability coefficient, internal friction angle, and cohesion.

[0018] Preferably, the task identification module uses text analysis or information extraction technology to determine the project area from the construction plan.

[0019] As a preferred method, a comprehensive assessment of the soil adaptability of the project area is conducted, as follows:

[0020] Obtain the pipeline stress distribution information of the selected pipeline in the corresponding soil layer water area of ​​the project area and the maximum soil entry and exit angle corresponding to the selected pipeline. The pipeline stress distribution information includes axial stress, annular stress, radial stress, vertical displacement, and lateral displacement; perform weighted sum calculation on all factors of the pipeline stress distribution information and the maximum soil entry and exit angle to obtain the pipeline stability index corresponding to the selected pipeline;

[0021] Obtain the actual stress of the casing under various load combinations, including deadweight, current force, wave force, and soil pressure; identify the allowable stress of the corresponding material of the casing; calculate the weighted average of the actual stress of the casing under different load combinations to obtain the comprehensive actual stress; divide the allowable stress of the corresponding material of the casing by the comprehensive actual stress to obtain the casing safety factor;

[0022] The pipeline stability index and casing safety factor corresponding to the selected pipeline are weighted and calculated to obtain a comprehensive evaluation score, and all selected pipelines are traversed;

[0023] marking the pipeline stability index, casing safety factor and comprehensive evaluation score of the selected pipeline as comprehensive evaluation results;

[0024] The comprehensive evaluation results are presented in the form of intuitive charts, graphs and images to generate visual reports.

[0025] Preferably, when an intelligent algorithm is used to optimize the construction plan, the intelligent algorithm is a genetic algorithm or a simulated annealing algorithm.

[0026] Preferably, when acquiring water area information, the information acquisition module measures the current velocity and direction data by means of an acoustic Doppler current profiler installed at an ocean monitoring station and a buoy; wave parameters are acquired using a pressure wave height meter and a wave direction sensor on a wave buoy; water level change data are acquired through a data connection with a tidal monitoring station; seawater temperature and salinity are measured using a high-precision temperature sensor and a salinity sensor, respectively, and the sensors are all connected to a data transmission link.

[0027] Preferably, the data storage module has data backup and recovery functions, specifically, the data of the soil-water area database is backed up to an off-site disaster recovery storage center by combining regular full backup and real-time incremental backup; regular full backup completely backs up the entire database according to a preset time period; real-time incremental backup only backs up the data that has changed since the last backup when the data is updated.

[0028] Compared with the related art, the adaptability analysis and evaluation system for submarine pipeline directional drilling through soil layers provided by the present invention has the following beneficial effects:

[0029] 1. The present invention can comprehensively consider the water area, soil layer information and pipeline characteristics of the project area through the collaborative work of multiple modules. The adaptation analysis unit accurately matches the pipeline and soil water conditions, the mechanical analysis unit accurately simulates the mechanical properties of the pipeline, and the evaluation and optimization module performs a comprehensive evaluation. Compared with the traditional method that relies on experience and simple tests, it can more accurately evaluate the adaptability of the soil layer, provide a reliable basis for construction, and reduce the construction risks caused by inaccurate evaluation.

[0030] 2. The present invention uses the mechanical analysis unit and the casing and support pile analysis unit in the data processing module. The mechanical analysis unit simulates the stress deformation of the pipeline and determines the maximum entry and exit angle to ensure the strength safety of the pipeline; the casing and support pile analysis unit evaluates the vortex-induced vibration response to ensure its vibration safety. Through various safeguard measures, the problems of pipeline damage and drilling accidents during construction can be effectively avoided, which effectively improves the safety and reliability of the construction, reduces the potential safety hazards in the construction process, and ensures the smooth progress of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a system principle block diagram of the adaptability analysis and evaluation system for submarine pipeline directional drilling through soil layers provided by the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "group", "class" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0034] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0035] Please refer to Figure 1 The adaptability analysis and evaluation system for submarine pipeline directional drilling through soil layers includes:

[0036] The task identification module is used to read the construction plan, identify and mark the engineering area where the submarine pipeline needs to be directional drilled through the soil layer;

[0037] The information acquisition module is used to obtain the water area information and soil layer information of the project area and send it to the data storage module, and update the information in time series;

[0038] A data storage module, used to receive and process water area information and soil layer information of the project area, and to build a soil layer-water area database;

[0039] The data processing module includes an adaptation analysis unit, a mechanical analysis unit, and a casing and support pile analysis unit, which respectively perform pipeline adaptation analysis, pipeline-seabed mechanical analysis, and casing and support pile mechanical analysis;

[0040] The evaluation and optimization module conducts a comprehensive evaluation of the soil adaptability in the project area based on the pipeline adaptation analysis results output by the adaptation analysis unit and the pipeline mechanical performance analysis results output by the mechanical analysis unit, and uses intelligent algorithms to optimize the construction plan.

[0041] In this application, the data processing module includes an adaptation analysis unit, a mechanical analysis unit, and a casing and support pile analysis unit, which are specifically:

[0042] The adaptation analysis unit is used to input pipeline parameter information of different types of pipelines, including pipe diameter, wall thickness, material, compressive strength, and anti-corrosion performance, and establish a pipeline database; based on the information in the soil layer-water area database, the pipeline adaptation analysis is performed to analyze the requirements of different soil layers and water areas for pipeline performance, and the pipeline parameters in the pipeline database are matched with the soil layer-water area conditions. The fitness score of each pipeline and the soil layer and water area of ​​the project area is calculated by weighted summation. The specific formula is:

[0043] ; Where wi represents the weight of the i-th factor, fi(x) represents the fitness function of the i-th factor, and x is the factor in the pipeline and soil-water database;

[0044] Sort the pipelines according to the fitness scores, output the set number of pipeline types with the highest fitness as the selected pipelines, and generate an analysis report corresponding to the selected pipelines, including the preferred points of the pipelines, applicable scenarios, and the fitness scores of the selected pipelines in the corresponding soil layers and waters of the project area;

[0045] The mechanical analysis unit builds a pipeline-seabed nonlinear model based on the finite element algorithm combined with the soil layer information of the project area and the pipeline parameter information of the selected pipeline; simulates the stress distribution and deformation of the pipeline under the set entry and exit angle, obtains the specification requirements of the selected pipeline in the project area, and determines the maximum entry and exit angle of the pipeline that meets the specification requirements through iterative calculation and optimization algorithm, specifically:

[0046] The pipeline stress is calculated according to the formula of the preset standard specification "Submarine Pipeline System", which is expressed as: ; Among them, the meaning of each parameter in the formula is: It represents the design bending moment, which is calculated through the stress analysis of the pipeline under different working conditions; Represents a safety factor or correction factor associated with the pipeline material to take into account factors such as uncertainty in material properties; It indicates a safety factor or correction factor related to the pipeline structure or construction, which is used to correct some influencing factors of the structural stability or construction process; It represents the design effective axial force, which is calculated based on the pipeline's deadweight, internal pressure and external load; pi represents the pipeline's characteristic internal pressure; pe represents the pipeline's external pressure; Indicates the bursting pressure, calculated based on the pipeline material and structural parameters; It represents the plastic axial force resistance, and its calculation formula is expressed as ,in represents the yield strength of the pipeline material, D represents the outer diameter of the pipeline, and t represents the wall thickness of the pipeline. Indicates the wall thickness under specific conditions, including but not limited to high pressure, high temperature, corrosive environment or end of design life; It represents the plastic bending moment resistance, and its calculation formula is expressed as ; Represents the calculation parameters related to the pipeline material characteristics, and its formula is ,in represents a material parameter, and the formula is , Indicates the ultimate strength of the pipeline material; It represents the calculation parameters related to the internal and external pressure of the pipeline. The formula is: ;

[0047] The casing and support pile analysis unit is used to perform mechanical analysis on the casing and support piles. According to the casing specifications, support pile specifications and support pile spacing arrangement, combined with the current and wave loads, the vortex-induced vibration response of the casing is analyzed, and the downstream natural frequency and lateral natural frequency are calculated. The specific calculation formula is:

[0048] Calculate the natural frequency in the downstream direction, the formula is expressed as ; In the formula, represents the downstream natural frequency, It represents the downstream shielding factor, which is determined according to the relative position between the pipeline and the ocean current and the casing structural characteristics; Indicates the 10-year return period velocity value at the pipeline; It represents the reduced velocity starting from VIV downstream, which is calculated based on the empirical formula and actual ocean current conditions; L represents the free span length, which is determined based on the spacing between support piles and the actual installation of the casing; D represents the outer diameter of the pipeline; represents the flow rate ratio, ,in, It represents the effective value of the flow velocity caused by the effective wave height at the pipeline corresponding to a return period of 1 year, calculated based on wave theory and actual wave parameters. It represents the velocity value of the pipeline at the return period of 100 years;

[0049] Calculation of transverse natural frequencies ; In the formula, represents the lateral natural frequency, represents the lateral shielding factor, is the reduced velocity at which VIV starts in the cross-flow direction. The calculation methods of the other parameters are similar to those in the downstream direction. By comparing the downstream natural frequency and the transverse natural frequency with their expected frequencies, it is determined whether the casing and support piles meet the vibration safety requirements.

[0050] In the present application, the information acquisition module establishes a data transmission link with several ocean monitoring stations and buoys distributed in and around the target sea area where the pipeline is pre-laid, and obtains the water area information of the project area in real time.

[0051] In this application, the water area information of the project area includes current velocity, direction, wave parameters, water level changes, seawater temperature, and salinity; the soil layer information of the project area includes rock and soil number, rock and soil name, water content, gravity density, porosity, liquid limit, plastic limit, permeability coefficient, internal friction angle, and cohesion.

[0052] In this application, the task identification module uses text analysis or information extraction technology to determine the project area from the construction plan.

[0053] In this application, a comprehensive assessment of the soil adaptability of the project area is carried out, as follows:

[0054] Obtain the pipeline stress distribution information of the selected pipeline in the corresponding soil layer water area of ​​the project area and the maximum soil entry and exit angle corresponding to the selected pipeline. The pipeline stress distribution information includes axial stress, annular stress, radial stress, vertical displacement, and lateral displacement; perform weighted sum calculation on all factors of the pipeline stress distribution information and the maximum soil entry and exit angle to obtain the pipeline stability index corresponding to the selected pipeline. The pipeline stability index can comprehensively consider the stability of the pipeline under complex stress and deformation conditions;

[0055] Obtain the actual stress of the casing under various load combinations, including deadweight, current force, wave force, and soil pressure; identify the allowable stress of the corresponding material of the casing; calculate the weighted average of the actual stress of the casing under different load combinations to obtain the comprehensive actual stress; divide the allowable stress of the corresponding material of the casing by the comprehensive actual stress to obtain the casing safety factor. The casing safety factor can intuitively reflect the safety of the casing in actual use. For example, in areas with strong current and wave effects, the actual stress corresponding to the current force and wave force accounts for a large proportion of the weighted average. If the safety factor is greater than 1, and the higher the value, the safer the casing is;

[0056] The pipeline stability index and casing safety factor corresponding to the selected pipeline are weighted to obtain a comprehensive evaluation score, and all selected pipelines are traversed. This process fully considers the performance of the pipeline and casing. Different pipeline and casing combinations will have different scores. The weight is determined based on engineering experience and the impact of each indicator on overall safety. The higher the comprehensive evaluation score, the better the adaptability of the pipeline and casing combination in the soil layer, providing a quantitative basis for the selection of construction plans;

[0057] marking the pipeline stability index, casing safety factor and comprehensive evaluation score of the selected pipeline as comprehensive evaluation results;

[0058] The comprehensive evaluation results are presented in the form of intuitive charts, graphs and images to generate visual reports; for example, a bar chart is used to compare the pipeline stability index and casing safety factor of different pipelines, a stress cloud map is used to show the pipeline stress distribution, and a geological profile of the project area combined with the pipeline location is used to show the relationship between the soil layer and the pipeline. This visual method allows engineering personnel to quickly understand the advantages and disadvantages of different solutions, intuitively grasp the feasibility and risk points of construction, and assist in scientific decision-making.

[0059] In this application, when an intelligent algorithm is used to optimize the construction plan, the intelligent algorithm is a genetic algorithm or a simulated annealing algorithm.

[0060] In the present application, when acquiring water area information, the information acquisition module measures the current velocity and direction data through the acoustic Doppler current profiler installed on the ocean monitoring station and the buoy; the wave parameters are acquired using the pressure wave height meter and wave direction sensor on the wave buoy; the water level change data is acquired through the data connection with the tide monitoring station; the seawater temperature and salinity are measured using high-precision temperature sensors and salinity sensors respectively, and the sensors are all connected to the data transmission link.

[0061] In the present application, the data storage module has the function of data backup and recovery, specifically, the data of the soil-water area database is backed up to an off-site disaster recovery storage center by combining regular full backup and real-time incremental backup; regular full backup completely backs up the entire database according to a preset time period; real-time incremental backup only backs up the data that has changed since the last backup when the data is updated.

[0062] Application Examples

[0063] In a specific application, for example, in the context of a submarine pipeline directional drilling crossing project, the workflow is as follows:

[0064] The task identification module accurately extracts the location information of the project area from the construction task file.

[0065] The information acquisition module acquires the water area information of the region in real time through the data transmission link established with the surrounding ocean monitoring stations and buoys, such as the current velocity of 1.5m / s, the flow direction of northeast, the average wave height of 2.0m, the water level range of 1.0-3.0m, the seawater temperature of 18℃, and the salinity of 32‰. At the same time, through geological survey, the main soil layer in the region is silty silty clay, with a water content of 45%, a gravity density of 17.5kN / m³, a porosity of 1.2, an internal friction angle of 10°, and a cohesion of 12kPa, and transmits this information to the data storage module. After cleaning and classifying the data, the data storage module constructs a soil layer-water area database.

[0066] The adaptation analysis unit collects parameter information of various pipelines, establishes a pipeline database, and calculates that a pipeline with a diameter of 800mm, a wall thickness of 20mm, and a material of high-strength alloy steel has the highest adaptation score. It is selected as the pipeline type for the project and an analysis report is generated.

[0067] The mechanical analysis unit is based on the finite element algorithm, combined with the soil layer information of the project area and the selected pipeline parameters, to construct a pipeline-seabed nonlinear model, simulate the stress distribution and deformation of the pipeline at different entry and exit angles, and determine through calculation that the maximum entry and exit angle is 8°.

[0068] The casing and supporting pile analysis unit calculates the downstream natural frequency and lateral natural frequency of the casing based on the casing specifications of Ф1500×25, the supporting pile specifications of Ф1400×25, and the supporting pile spacing of 8m, combined with the current and wave loads, and determines that it meets the vibration safety requirements.

[0069] The evaluation and optimization module comprehensively adapts the analysis and mechanical analysis results, calculates the pipeline stability index to be 0.85, the casing safety factor to be 1.2, and the construction risk level to be low, and generates a visual report to show the feasibility and risk points of the construction. The construction plan is optimized using a genetic algorithm, with the soil entry and exit angle adjusted to 7°, the hole expansion differential to 200mm, and the mud parameters to a viscosity of 18-22s. It is determined that a 500kW drilling rig and a drill rod with a strength grade of S135 will be used, which improves the overall performance of the construction plan.

[0070] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed in this disclosure. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0071] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. The adaptability analysis and evaluation system for submarine pipeline directional drilling through soil layers is characterized by: include: The task identification module is used to read the construction plan, identify and mark the engineering area where the submarine pipeline needs to be directional drilled through the soil layer; The information acquisition module is used to obtain the water area information and soil layer information of the project area and send it to the data storage module, and update the information in time series; A data storage module, used for receiving and processing water area information and soil layer information of the project area, and building a soil layer-water area database; The data processing module includes an adaptation analysis unit, a mechanical analysis unit, and a casing and support pile analysis unit, which respectively perform pipeline adaptation analysis, pipeline-seabed mechanical analysis, and casing and support pile mechanical analysis; The adaptation analysis unit is used to input pipeline parameter information of different types of pipelines, including pipe diameter, wall thickness, material, compressive strength, and anti-corrosion performance, and establish a pipeline database; based on the information in the soil layer-water area database, the pipeline adaptation analysis is performed to analyze the requirements of different soil layers and water areas for pipeline performance, and the pipeline parameters in the pipeline database are matched with the soil layer-water area conditions. The fitness score of each pipeline and the soil layer and water area of ​​the project area is calculated by weighted summation, and the pipelines are sorted according to the fitness score. The set number of pipeline types with the highest fitness is output as the selected pipeline, and an analysis report corresponding to the selected pipeline is generated, including the preferred points of the pipeline, applicable scenarios, and the fitness score of the selected pipeline in the corresponding soil layer and water area of ​​the project area; The mechanical analysis unit builds a pipeline-seabed nonlinear model based on the finite element algorithm combined with the soil layer information of the project area and the pipeline parameter information of the selected pipeline; simulates the stress distribution and deformation of the pipeline under the set entry and exit angle, obtains the specification requirements of the selected pipeline in the project area, and determines the maximum entry and exit angle of the pipeline that meets the specification requirements through iterative calculation and optimization algorithm; The casing and support pile analysis unit is used to perform mechanical analysis on the casing and support piles. According to the casing specifications, support pile specifications and support pile spacing arrangement, combined with the current and wave loads, the vortex-induced vibration response of the casing is analyzed, and the downstream natural frequency and the lateral natural frequency are calculated. By comparing the downstream natural frequency and the lateral natural frequency with their expected frequencies, it is determined whether the casing and support piles meet the vibration safety requirements; The evaluation and optimization module conducts a comprehensive evaluation of the soil adaptability in the project area based on the pipeline adaptation analysis results output by the adaptation analysis unit and the pipeline mechanical performance analysis results output by the mechanical analysis unit, and uses intelligent algorithms to optimize the construction plan.

2. The adaptability analysis and evaluation system for submarine pipeline directional drilling through soil layers according to claim 1 is characterized in that: The information acquisition module establishes a data transmission link with a number of ocean monitoring stations and buoys distributed in and around the target sea area where the pipeline is pre-laid, and acquires water area information of the project area in real time.

3. The adaptability analysis and evaluation system for submarine pipeline directional drilling through soil layers according to claim 1 is characterized in that: The water area information of the project area includes current velocity, flow direction, wave parameters, water level changes, seawater temperature, and salinity; the soil layer information of the project area includes rock and soil number, rock and soil name, water content, gravity density, porosity, liquid limit, plastic limit, permeability coefficient, internal friction angle, and cohesion.

4. The adaptability analysis and evaluation system for submarine pipeline directional drilling through soil layers according to claim 1 is characterized in that: The task identification module uses text analysis or information extraction technology to determine the project area from the construction plan.

5. The adaptability analysis and evaluation system for submarine pipeline directional drilling through soil layers according to claim 1 is characterized in that: A comprehensive assessment of the soil adaptability of the project area is carried out as follows: Obtain the pipeline stress distribution information of the selected pipeline in the corresponding soil layer water area of ​​the project area and the maximum soil entry and exit angle corresponding to the selected pipeline. The pipeline stress distribution information includes axial stress, annular stress, radial stress, vertical displacement, and lateral displacement; perform weighted sum calculation on all factors of the pipeline stress distribution information and the maximum soil entry and exit angle to obtain the pipeline stability index corresponding to the selected pipeline; Obtain the actual stress of the casing under various load combinations, including deadweight, current force, wave force, and soil pressure; Identify the allowable stress of the corresponding material of the casing; calculate the weighted average of the actual stress of the casing under different load combinations to obtain the comprehensive actual stress; The casing safety factor is obtained by dividing the allowable stress of the casing corresponding material by the comprehensive actual stress; The pipeline stability index and casing safety factor corresponding to the selected pipeline are weighted and calculated to obtain a comprehensive evaluation score, and all selected pipelines are traversed; marking the pipeline stability index, casing safety factor and comprehensive evaluation score of the selected pipeline as comprehensive evaluation results; The comprehensive evaluation results are presented in the form of intuitive charts, graphs and images to generate visual reports.

6. The adaptability analysis and evaluation system for submarine pipeline directional drilling through soil layers according to claim 1 is characterized in that: When an intelligent algorithm is used to optimize the construction plan, the intelligent algorithm is a genetic algorithm or a simulated annealing algorithm.

7. The adaptability analysis and evaluation system for submarine pipeline directional drilling through soil layers according to claim 2 is characterized in that: When acquiring water area information, the information acquisition module measures the ocean current velocity and direction data by means of an acoustic Doppler current profiler installed at an ocean monitoring station and a buoy; wave parameters are acquired by means of a pressure wave height meter and a wave direction sensor on a wave buoy; water level change data are acquired by means of a data connection with a tidal monitoring station; and seawater temperature and salinity are measured by means of a high-precision temperature sensor and a salinity sensor, respectively, and the sensors are all connected to a data transmission link.

8. The adaptability analysis and evaluation system for submarine pipeline directional drilling through soil layers according to claim 1 is characterized in that: The data storage module has data backup and recovery functions, specifically, it uses a combination of regular full backup and real-time incremental backup to back up the data of the soil-water database to an off-site disaster recovery storage center; regular full backup completely backs up the entire database according to a preset time period; real-time incremental backup only backs up the data that has changed since the last backup when the data is updated.

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