A group pile stability evaluation and early warning method considering environmental load

Abstract

The application provides a group pile stability evaluation and early warning method considering environmental load influence, comprising the following steps: grouping all pile foundations in a monitoring water area based on horizontal bearing capacity of the pile foundations to obtain a first preset number of pile foundation groups; for each pile foundation group, selecting several pile foundations from the plurality of pile foundations in the pile foundation group as monitoring pile foundations; obtaining predicted hydrological information, and obtaining pile top displacement of each monitoring pile foundation according to a predetermined relationship between the hydrological information and the pile top displacement of each monitoring pile foundation, wherein the hydrological information comprises wave, water level and water flow rate; for each pile foundation group, obtaining a danger level of the pile foundations in the pile foundation group based on the pile top displacement of each monitoring pile foundation in the pile foundation group according to a danger judgment rule, and performing early warning according to the danger level. The application realizes evaluation and early warning of marine pile foundation stability, and meets pile foundation stability early warning requirements under various environmental conditions.

Description

Technical Field

[0001] This invention belongs to the field of pile foundation technology, and in particular relates to a method for assessing and warning the stability of pile groups considering the influence of environmental loads. Background Technology

[0002] With rapid economic development, people have begun to construct deep-water wharves, cross-sea bridges, and other infrastructure projects in offshore, deep-water, and complex foundation conditions, leading to the widespread application of marine pile foundations. The quality of pile foundation engineering directly affects the safety of the entire structure and is related to people's lives and property. During use, the stability of pile foundations is affected by adverse hydrological and meteorological conditions; without an effective monitoring and early warning system, major safety accidents may occur.

[0003] According to port construction research, during construction, the open sea and deep water conditions often leave the area unprotected. Offshore construction operations are frequently subjected to strong winds, high waves, and undercurrents, and the lack of effective temporary protective measures can significantly extend the construction period. Currently, pile foundation engineering is widely used in the foundation construction of wharves and bridges in transportation, water conservancy, and other fields; therefore, monitoring the stability of pile foundations is crucial.

[0004] At present, most marine pile foundation monitoring is done manually and irregularly. This traditional method cannot monitor the stability of the pile foundation in real time, nor can it provide early warning. Moreover, due to the large area of ​​the water and the large number of pile foundations, traditional manual inspection is time-consuming, labor-intensive, and also poses certain dangers. Summary of the Invention

[0005] The purpose of this invention is to provide a method for assessing and warning the stability of pile groups that takes into account the influence of environmental loads, so as to realize the assessment and warning of the stability of marine pile foundations and meet the requirements for pile foundation stability warning under various environmental conditions.

[0006] This invention is achieved through the following technical solution:

[0007] A method for assessing and warning the stability of pile groups considering the influence of environmental loads includes the following steps:

[0008] Based on the horizontal bearing capacity of the pile foundation, all pile foundations in the monitored water area are grouped to obtain the first preset number of pile foundation groups.

[0009] For each pile foundation group, select several pile foundations from among the multiple pile foundations in the pile foundation group as monitoring pile foundations;

[0010] Obtain forecasted hydrological information, and based on the relationship between the predetermined hydrological information and the pile top displacement of each monitoring pile foundation, obtain the pile top displacement of each monitoring pile foundation. The hydrological information includes waves, water level, and water flow velocity.

[0011] For each pile foundation group, based on the pile top displacement of each monitored pile foundation within the pile foundation group, the hazard level of the pile foundation within the pile foundation group is obtained according to the hazard judgment rules, and an early warning is issued based on the hazard level.

[0012] Furthermore, monitoring components are installed on the monitoring piles. These components include an inclinometer, an accelerometer, and multiple pressure sensors installed on the outer wall of the monitoring piles. The pressure sensors are spaced apart from top to bottom. The process for determining the relationship between hydrological information and the top displacement of each monitoring pile is as follows:

[0013] The monitoring components collect monitoring data of the pile foundation and form the first dataset. The monitoring data includes the pile foundation tilt angle, pile foundation acceleration and water pressure data set. The water pressure data set includes pressure values ​​measured by multiple pressure sensors.

[0014] Based on the first dataset, a deep learning algorithm was used to obtain the first relationship between the pile foundation acceleration, pile foundation tilt angle and water pressure data set;

[0015] Simultaneously, forecast hydrological information and water pressure data sets are acquired and a second dataset is formed. Based on the second dataset, a second relationship between the water pressure data sets and hydrological information is obtained using a deep learning algorithm.

[0016] Based on the first and second relationships, a third relationship between hydrological information and pile foundation inclination angle is obtained;

[0017] The pile top displacement is calculated based on the pile inclination angle, and the relationship between hydrological information and the monitored pile top displacement is obtained based on the third relationship.

[0018] Furthermore, the steps for determining the hazard level of each pile within the pile group based on the pile top displacement of each monitored pile and according to the hazard assessment rules include:

[0019] The pile top displacements of all monitored piles within the pile foundation group are compared to obtain the maximum pile top displacement.

[0020] Assess the hazard level of the pile foundation within the pile group based on the obtained maximum pile top displacement:

[0021]

[0022]

[0023]

[0024]

[0025] Where S is the maximum pile top displacement obtained, δ represents the allowable error (a constant), K1 represents the first threshold of pile top displacement (a constant), K2 represents the second threshold of pile top displacement (a constant), and K3 represents the third threshold of pile top displacement (a constant).

[0026] When formula (1) is satisfied, the danger level of the pile foundation in the pile foundation group is determined to be Level 1.

[0027] When formula (2) is satisfied, the danger level of the pile foundation in the pile foundation group is determined to be level two danger level;

[0028] When formula (3) is satisfied, the danger level of the pile foundation in the pile foundation group is determined to be level three danger level.

[0029] When formula (4) is satisfied, the danger level of the pile foundation in the pile foundation group is determined to be level four danger level.

[0030] Furthermore, the steps for issuing warnings based on hazard levels include:

[0031] When the hazard level is determined to be Level 1, no early warning for pile foundation stability will be issued.

[0032] When the hazard level is determined to be Level II, a Level I warning for pile foundation stability will be issued to remind management personnel to pay attention and take appropriate action.

[0033] When the hazard level is determined to be Level III, a Level II early warning for pile foundation stability is issued to remind management personnel to carry out reinforcement treatment of the pile foundation.

[0034] When the hazard level is determined to be Level IV, a Level III early warning for pile foundation stability is issued to remind management personnel to implement closed management of the pile foundation area.

[0035] Furthermore, the step of selecting several piles from multiple piles within the pile foundation group as monitoring piles includes:

[0036] Determine whether the side of the monitored water body facing the direction of normal waves and the side facing the direction of strong waves are the same;

[0037] If they are the same, then select the second preset number of piles from the piles closest to the normal wave direction in the pile group as the monitoring piles.

[0038] If they are not the same, then a second preset number of piles will be selected from the piles closest to the normal wave direction and a second preset number of piles will be selected from the piles closest to the strong wave direction as monitoring piles.

[0039] Furthermore, the step of grouping all pile foundations within the monitored water area based on their horizontal bearing capacity includes:

[0040] The horizontal bearing capacity of all pile foundations within the monitored water area was calculated and compared to obtain the maximum and minimum horizontal bearing capacity.

[0041] The range between the minimum horizontal bearing capacity and the maximum horizontal bearing capacity is divided into a first preset number of group ranges;

[0042] Pile foundations with horizontal bearing capacity within the same grouping range are classified into the same pile foundation group.

[0043] Furthermore, it also includes a data acquisition base station, which includes a power distribution box, a pole, a data acquisition instrument, and a solar panel. The pole is set vertically, the solar panel is set at the top of the pole and electrically connected to the data acquisition instrument, the power distribution box and the data acquisition instrument are set on the pole, and the power distribution box is electrically connected to the data acquisition instrument. The data acquisition instrument is electrically connected to an inclinometer, an acceleration sensor and a pressure sensor, respectively.

[0044] Furthermore, support rods are installed on both sides of the pole between it and the solar panel.

[0045] Furthermore, the monitoring components also include a first steel section and a second steel section. The first steel section is installed on the top of the pile foundation, and the inclinometer and acceleration sensor are set on the first steel section. The second steel section is installed on the outer wall of the pile foundation and is vertically arranged. Multiple pressure sensors are arranged at intervals from top to bottom on the second steel section.

[0046] Compared with existing technologies, the beneficial effects of this invention are as follows: By establishing a relationship between pre-determined hydrological information and the top displacement of each monitored pile foundation, the top displacement of the pile foundation within the monitored water area can be pre-calculated when acquiring forecasted hydrological information. Based on the top displacement, the hazard level of the pile foundation can be pre-judged, and finally, an early warning can be issued based on the determined hazard level, achieving real-time early warning for the pile foundations throughout the entire monitored water area. The hazard level of the pile foundation can be determined in real time, eliminating the need for regular manual inspections and preventing missed measurements, thus saving manpower and avoiding the risks associated with manual inspections. This invention is adaptable to wave monitoring in various water conditions and can be widely applied to autonomous monitoring and early warning operations for marine pile foundations. Attached Figure Description

[0047] Figure 1 The flowchart of the method for assessing and warning the stability of pile groups considering the influence of environmental loads in this invention is shown below.

[0048] Figure 2 This is a schematic diagram of the installation of the monitoring components of the pile group stability assessment and early warning method considering the influence of environmental loads in this invention;

[0049] Figure 3 This is a schematic diagram of the data acquisition base station for the group pile stability assessment and early warning method that takes into account the influence of environmental loads in this invention.

[0050] In the diagram, 1-pile foundation, 2-tilt meter, 3-accelerometer, 4-pressure sensor, 5-first type steel, 6-second type steel, 7-distribution box, 8-pole, 9-data acquisition instrument, 10-solar panel, 11-support rod. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0052] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0053] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0055] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0056] Please see Figure 1 , Figure 1 This is a flowchart illustrating the steps of the pile group stability assessment and early warning method considering the influence of environmental loads according to the present invention. A pile group stability assessment and early warning method considering the influence of environmental loads includes the following steps:

[0057] S1. Based on the horizontal bearing capacity of the pile foundation, all pile foundations in the monitored water area are grouped to obtain the first preset number of pile foundation groups;

[0058] S2. For each pile foundation group, select several pile foundations from the multiple pile foundations within the pile foundation group as monitoring pile foundations;

[0059] S3. Obtain the forecasted hydrological information. Based on the relationship between the predetermined hydrological information and the pile top displacement of each monitoring pile, obtain the pile top displacement of each monitoring pile. The hydrological information includes waves, water level and water flow velocity.

[0060] S4. For each pile foundation group, based on the pile top displacement of each monitored pile foundation in the pile foundation group, the danger level of the pile foundation in the pile foundation group is obtained according to the danger judgment rule, and an early warning is issued according to the danger level.

[0061] In step S1 above, since the geology in the monitored water area is continuously changing, the horizontal bearing capacity of the pile foundation is also continuously changing. Therefore, all the pile foundations in the monitored water area can be grouped according to the magnitude of the horizontal bearing capacity of the pile foundation to obtain the first preset number of pile foundation groups.

[0062] Furthermore, in step S1, the step of grouping all piles within the monitored water area based on the horizontal bearing capacity of the pile foundation includes:

[0063] S11. Calculate the horizontal bearing capacity of all pile foundations in the monitored water area and compare them to obtain the maximum and minimum horizontal bearing capacity;

[0064] S12. Divide the range between the minimum horizontal bearing capacity and the maximum horizontal bearing capacity into a first preset number of group ranges;

[0065] S13. Pile foundations with horizontal bearing capacity within the same group range are divided into the same pile foundation group.

[0066] In steps S11 to S13 above, the horizontal bearing capacity of the pile foundation can be calculated using existing methods, such as collecting geological conditions (soil shear strength, unit weight, etc.) and pile dimensions from the monitored water area. Then, the horizontal bearing capacity of the pile foundation is calculated, and the calculated horizontal bearing capacities of all pile foundations are compared to obtain the minimum and maximum horizontal bearing capacities. The range between the minimum and maximum horizontal bearing capacities is then divided into a first preset number of group ranges, specifically, for example, three. Then, according to the following formulas, the range between the minimum and maximum horizontal bearing capacity is divided into three group ranges: [S1, S1+(S2-S1) / 3), [S1+(S2-S1) / 3, S1+(S2-S1)*2 / 3), [S1+(S2-S1)*2 / 3, S2), where S1 is the minimum horizontal bearing capacity and S2 is the maximum horizontal bearing capacity. Based on the horizontal bearing capacity of the pile foundation, pile foundations with horizontal bearing capacities within the same group range are divided into the same pile foundation group, resulting in three pile foundation groups. Of course, the first preset number can also be other numbers, dividing the range between the minimum and maximum horizontal bearing capacity into several group ranges in the above manner.

[0067] In step S2 above, there are multiple piles in each pile foundation group. In order to reduce the number of piles to be monitored, a number of monitoring piles are selected from the multiple piles in the pile foundation group to represent the multiple piles in the pile foundation group, thereby reducing the number of piles to be monitored.

[0068] Furthermore, in step S2, the step of selecting several piles from multiple piles within the pile foundation group as monitoring piles includes:

[0069] S21. Determine whether the side of the monitored water area facing the direction of normal waves and the side facing the direction of strong waves are the same;

[0070] S22. If they are the same, then select the second preset number of piles from the piles closest to the normal wave direction in the pile group as the monitoring piles.

[0071] S23. If they are not the same, then select a second preset number of piles from the piles closest to the normal wave direction and a second preset number of piles from the piles closest to the strong wave direction as monitoring piles.

[0072] In steps S21 to S23 above, when selecting monitoring piles, the outermost piles should be chosen, specifically those facing the direction of normal waves and strong waves. This is because piles in these locations typically come into contact with the waves first, and the waves have a relatively large impact on them. Therefore, the selected monitoring piles can represent all piles within the entire pile group. Since the direction of normal waves and strong waves may differ, it is first determined whether the side of the monitored water area facing the direction of normal waves is the same as the side facing the direction of strong waves. If they are the same, a second preset number of piles is selected from the piles closest to the side facing the direction of normal waves within the pile group as monitoring piles. The second preset number can be selected based on the actual situation. For example, if the second preset number is two, then two piles are selected as monitoring piles. If they are not the same, then select a second preset number of piles from the piles closest to the normal wave direction and a second preset number of piles from the piles closest to the strong wave direction as monitoring piles. That is, select two piles from the outer piles closest to the strong wave direction and two piles from the outer piles closest to the normal wave direction, for a total of four piles as monitoring piles.

[0073] In step S3 above, hydrological information can be collected through a cloud platform. Based on the collected hydrological information, and through the relationship between the pre-determined hydrological information and the pile top displacement of each monitoring pile foundation, the pile top displacement of the pile foundation in the monitored water area can be pre-calculated when obtaining the forecast hydrological information, thereby obtaining the instability of the pile foundation, so as to provide data for subsequent judgment of the danger level of the pile foundation. The instability of the pile foundation refers to the maximum value of the pile top displacement being greater than the allowable deviation.

[0074] Please combine Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the installation of the monitoring components of the early warning method for marine pile foundation 1 of the present invention; Figure 3This is a schematic diagram of the data acquisition base station structure for the early warning method of marine pile foundation 1 of the present invention. Further, in step S3, a monitoring component is installed on the monitoring pile foundation 1. The monitoring component includes an inclinometer 2 installed on the outer wall of the monitoring pile foundation 1, an acceleration sensor 3 installed on the outer wall of the monitoring pile foundation 1, and multiple pressure sensors 4 installed on the outer wall of the monitoring pile foundation 1, with the multiple pressure sensors 4 spaced apart from top to bottom. The inclinometer 2 is used to measure the tilt angle of the pile foundation 1. The displacement of the pile top of the pile foundation 1 can be calculated by measuring the tilt angle of the pile foundation 1, and the sway amplitude of the pile foundation 1 can be displayed intuitively. In one embodiment, the inclinometer 2 is a biaxial inclinometer 2. The acceleration sensor 3 is used to measure the acceleration of the sway of the pile foundation 1, thereby determining the sudden wave conditions, and in turn mapping the data magnitudes of the pressure sensors 4 and the inclinometer 2, supplementing the stability monitoring of the pile foundation 1. Multiple pressure sensors 4 are used to measure the pressure of waves on the outer wall of the pile foundation 1, obtaining a set of water pressure data. After the pressure sensors 4 are installed, the distance between each pressure sensor 4 and the top of the pile foundation 1 is recorded, thus obtaining the wave pressure on the pile foundation 1 at different tide levels. This allows for a direct understanding of the magnitude and manner of wave pressure on the pile foundation 1 under wave action. The water pressure data set provides a direct understanding of the cycle of extreme large waves and storm surges. The height of the multiple pressure sensors 4 is determined by the wave conditions of the water area to adapt to the monitoring requirements of different sea states. For example, the lowest and highest monitoring points are controlled based on historical wave height and water level data, and then monitoring points are set in intermediate layers. In one embodiment, multiple pressure sensors 4 are arranged upwards from 0.5m below the low tide level, with a distance of 30cm between adjacent pressure sensors 4. Since the normal wave direction and strong wave direction at the location of the pile foundation 1 may not be consistent, the number of monitoring components is set to two, with the two monitoring components installed on the pile foundation 1 facing the normal wave direction and the strong wave direction, respectively.

[0075] To facilitate the collection of monitoring data for the monitoring pile 1 via monitoring components, the early warning method for the marine pile 1 of this invention further includes a data acquisition base station. The data acquisition base station includes a power distribution box 7, a pole 8, a data acquisition instrument 9, and a solar panel 10. The pole 8 is vertically positioned, and the solar panel 10 is located at the top of the pole 8 and electrically connected to the data acquisition instrument 9. The power distribution box 7 and the data acquisition instrument 9 are mounted on the pole 8, and the power distribution box 7 is electrically connected to the data acquisition instrument 9. The data acquisition instrument 9 is electrically connected to the inclinometer 2, the accelerometer 3, and the pressure sensor 4, respectively. The pole 8 serves as the column support for the power distribution box 7, the data acquisition instrument 9, and the solar panel 10. The solar panel 10 can convert solar energy to power the data acquisition instrument 9. When the power supply from the solar panel 10 is insufficient, power can be supplied through the power distribution box 7. The data acquisition instrument 9 receives monitoring data from the inclinometer 2, the accelerometer 3, and the pressure sensor 4. Furthermore, support rods 11 are provided on both sides of the pole 8 between it and the solar panel 10. This setup allows the solar panel 10 to be more securely fixed to the top of the pole 8.

[0076] To facilitate the installation of the inclinometer 2, accelerometer 3, and multiple pressure sensors 4 on the monitoring pile 1, the monitoring assembly further includes a first steel section 5 and a second steel section 6. The first steel section 5 is installed on the outer wall of the pile 1, and the inclinometer 2 and accelerometer 3 are mounted on the first steel section 5. The second steel section 6 is installed on the outer wall of the pile 1 and located below the first steel section 5. The second steel section 6 is vertically oriented, and the multiple pressure sensors 4 are spaced apart from top to bottom on the second steel section 6. The inclinometer 2 and accelerometer 3 can be pre-installed on the first steel section 5, and the multiple pressure sensors 4 can be pre-installed on the second steel section 6. Then, the first steel section 5 and the second steel section 6 are installed on the monitoring pile 1, thus completing the installation of the inclinometer 2, accelerometer 3, and multiple pressure sensors 4.

[0077] In step S3, the process of determining the relationship between hydrological information and the pile top displacement of each monitored pile foundation is as follows:

[0078] S31. The monitoring data of the monitoring pile foundation is collected through the monitoring component and a first dataset is formed. The monitoring data includes the pile foundation tilt angle, pile foundation acceleration and water pressure data set. The water pressure data set includes the pressure values ​​measured by multiple pressure sensors.

[0079] S32. Based on the first dataset, use a deep learning algorithm to obtain the first relationship between the pile foundation acceleration, pile foundation inclination angle and water pressure data set;

[0080] S33. Simultaneously acquire the forecasted hydrological information and water pressure data set, and form a second dataset. Based on the second dataset, use a deep learning algorithm to obtain the second relationship between the water pressure data set and the hydrological information.

[0081] S34. Based on the first and second relationships, the third relationship between hydrological information and pile foundation inclination angle is obtained;

[0082] S35. Calculate the pile top displacement based on the pile foundation inclination angle, and obtain the relationship between hydrological information and the monitored pile top displacement based on the third relationship.

[0083] In steps S31 to S35 above, monitoring data can be collected every hour by the monitoring component. The collected monitoring data are merged to form a first dataset. Then, a deep learning algorithm is used to obtain the first relationship between the pile foundation acceleration, pile foundation tilt angle and water pressure data set. Similarly, a meteorological report can be collected every hour by the cloud platform. The collection of meteorological reports and monitoring data can be carried out simultaneously to obtain meteorological reports and water pressure data sets collected at the same time. The collected meteorological reports and water pressure data sets are recorded to form a second dataset. Then, a deep learning algorithm is used to obtain the second relationship between the water pressure data set and hydrological information. Based on the first relationship between the pile foundation acceleration, pile foundation tilt angle and water pressure data set and the second relationship between the water pressure data set and hydrological information, a third relationship between hydrological information and pile foundation tilt angle is obtained. Then, the pile top displacement is calculated based on the pile inclination angle. The formula for calculating the pile top displacement is: S = L * sinθ, where S is the pile top displacement, L is the distance from the depth of the ultimate horizontal soil resistance inflection point to the pile top, and θ is the pile inclination angle. By replacing the pile inclination angle with the pile top displacement, the relationship between hydrological information and the monitored pile top displacement is finally obtained.

[0084] In step S4 above, after obtaining the pile top displacement of each monitored pile in the pile foundation group, the hazard level of the piles in the pile foundation group is determined based on the pile top displacement and the hazard judgment rules. An early warning is then issued based on the hazard level to alert management personnel, thereby achieving real-time monitoring and early warning of the stability of the pile foundations throughout the entire monitored water area. The early warning can be issued by sending a text message to the management personnel's mobile phone or by making a phone call.

[0085] Furthermore, in step S4, the step of determining the hazard level of each monitored pile in the pile group based on the pile top displacement and according to the hazard judgment rule includes:

[0086] S41. Compare the top displacements of all monitored piles in the pile foundation group to obtain the maximum top displacement;

[0087] S42. Assess the hazard level of the pile foundation within the pile group based on the obtained maximum pile top displacement:

[0088]

[0089]

[0090]

[0091]

[0092] Where S is the maximum pile top displacement obtained, δ represents the allowable error (a constant), K1 represents the first threshold value of pile top displacement (a constant), K2 represents the second threshold value of pile top displacement (a constant), and K3 represents the third threshold value of pile top displacement (a constant).

[0093] When formula (1) is satisfied, the danger level of the pile foundation in the pile foundation group is determined to be Level 1.

[0094] When formula (2) is satisfied, the danger level of the pile foundation in the pile foundation group is determined to be level two danger level;

[0095] When formula (3) is satisfied, the danger level of the pile foundation in the pile foundation group is determined to be level three danger level.

[0096] When formula (4) is satisfied, the danger level of the pile foundation in the pile foundation group is determined to be level four danger level.

[0097] In steps S41 to S42 above, the pile top displacement of the pile foundation represents the instability of the pile foundation. Based on different instability conditions, a hazard level and a parameter threshold for the pile foundation tilt angle corresponding to each hazard level are established. The hazard level obtained by the maximum pile top displacement of the monitored pile foundation in the pile foundation group represents the hazard level of other pile foundations in the pile foundation group, thereby obtaining the hazard level of all pile foundations in the entire monitored water area.

[0098] Furthermore, in step S4, the step of issuing a warning based on the hazard level includes:

[0099] S43. When the hazard level is determined to be Level 1, no early warning for pile foundation stability shall be issued.

[0100] S44. When the hazard level is determined to be Level II, a Level I warning for pile foundation stability shall be issued to remind management personnel to pay attention and take appropriate action.

[0101] S45. When the hazard level is determined to be Level III, a Level II early warning for pile foundation stability shall be issued to remind management personnel to carry out pile foundation reinforcement treatment.

[0102] S46. When the hazard level is determined to be Level IV, a Level III early warning for pile foundation stability shall be issued to remind management personnel to implement closed management of the pile foundation area.

[0103] In steps S43 to S46 above, for each pile foundation group, after obtaining the danger level of each pile foundation group, an early warning is issued to the management personnel according to the danger level of each pile foundation group. Thus, the management personnel can handle the pile foundations in the corresponding pile foundation group according to the early warning level of each pile foundation group, thereby realizing real-time early warning of all pile foundations in the entire monitored water area.

[0104] Compared with existing technologies, the beneficial effects of this invention are as follows: By establishing a relationship between pre-determined hydrological information and the top displacement of each monitored pile foundation, the top displacement of the pile foundation within the monitored water area can be pre-calculated when acquiring forecasted hydrological information. Based on the top displacement, the hazard level of the pile foundation can be pre-judged, and finally, an early warning can be issued based on the determined hazard level, achieving real-time early warning for the pile foundations throughout the entire monitored water area. The hazard level of the pile foundation can be determined in real time, eliminating the need for regular manual inspections and preventing missed measurements, thus saving manpower and avoiding the risks associated with manual inspections. This invention is adaptable to wave monitoring in various water conditions and can be widely applied to autonomous monitoring and early warning operations for marine pile foundations.

[0105] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Therefore, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A method for assessing and warning the stability of pile groups considering the influence of environmental loads, characterized in that, Includes the following steps: Based on the horizontal bearing capacity of the pile foundation, all pile foundations in the monitored water area are grouped to obtain the first preset number of pile foundation groups. For each pile foundation group, several pile foundations are selected from the multiple pile foundations in the pile foundation group as monitoring pile foundations; a monitoring component is installed on the monitoring pile foundation, the monitoring component includes an inclinometer installed on the outer wall of the monitoring pile foundation, an acceleration sensor installed on the outer wall of the monitoring pile foundation, and multiple pressure sensors installed on the outer wall of the monitoring pile foundation, the multiple pressure sensors are arranged at intervals from top to bottom; Obtain forecasted hydrological information, and based on the relationship between the predetermined hydrological information and the pile top displacement of each monitoring pile foundation, obtain the pile top displacement of each monitoring pile foundation. The hydrological information includes waves, water level, and water flow velocity. For each pile foundation group, based on the pile top displacement of each monitored pile foundation in the pile foundation group, the danger level of the pile foundation in the pile foundation group is obtained according to the danger judgment rule, and an early warning is issued according to the danger level; The process for determining the relationship between the hydrological information and the pile top displacement of each monitored pile foundation is as follows: The monitoring components collect monitoring data of the pile foundation and form a first dataset. The monitoring data includes pile foundation tilt angle, pile foundation acceleration and water pressure data. The water pressure data includes pressure values ​​measured by multiple pressure sensors. Based on the first dataset, a first relationship between the pile foundation acceleration, pile foundation tilt angle and water pressure data set is obtained using a deep learning algorithm; Simultaneously, forecasted hydrological information and water pressure data sets are acquired and a second dataset is formed. Based on the second dataset, a second relationship between the water pressure data sets and hydrological information is obtained using a deep learning algorithm. Based on the first and second relationships, a third relationship between hydrological information and pile foundation inclination angle is obtained; The pile top displacement of the pile foundation is calculated based on the pile foundation inclination angle, and the relationship between hydrological information and the pile top displacement of the monitored pile foundation is obtained based on the third relationship.

2. The method for assessing and warning the stability of pile groups considering the influence of environmental loads according to claim 1, characterized in that, The step of determining the hazard level of the piles in the pile group based on the pile top displacement of each monitored pile in the pile group and according to the hazard assessment rules includes: The pile top displacements of all monitored piles in the pile foundation group are compared to obtain the maximum pile top displacement. Assess the hazard level of the pile foundations within the pile group based on the obtained maximum pile top displacement: （1） （2） （3） （4） Where S is the maximum pile top displacement obtained. K1 represents the allowable error and is a constant; K2 represents the first threshold of pile top displacement and is a constant; K3 represents the second threshold of pile top displacement and is a constant; K4 represents the third threshold of pile top displacement and is a constant. When formula (1) is satisfied, the danger level of the pile foundation in the pile foundation group is determined to be Level 1 danger level; When formula (2) is satisfied, the danger level of the pile foundation in the pile foundation group is determined to be level two danger level; When formula (3) is satisfied, the danger level of the pile foundation in the pile foundation group is determined to be level three danger level. When formula (4) is satisfied, the danger level of the pile foundation in the pile foundation group is determined to be level four danger level.

3. The method for assessing and warning the stability of pile groups considering the influence of environmental loads according to claim 2, characterized in that, The step of issuing a warning based on the danger level includes: When the hazard level is determined to be Level 1, no early warning for pile foundation stability will be issued. When the hazard level is determined to be Level II, a Level I early warning for pile foundation stability is issued to remind management personnel to pay attention and take appropriate action. When the hazard level is determined to be Level III, a Level II early warning for pile foundation stability is issued to remind management personnel to carry out pile foundation reinforcement. When the hazard level is determined to be Level IV, a Level III early warning for pile foundation stability is issued to remind management personnel to implement closed management of the pile foundation area.

4. The method for assessing and warning the stability of pile groups considering the influence of environmental loads according to claim 1, characterized in that, The step of selecting several piles from the multiple piles in the pile foundation group as monitoring piles includes: Determine whether the side of the monitored water area facing the direction of normal waves and the side facing the direction of strong waves are the same; If they are the same, then select a second preset number of piles from the piles closest to the constant wave direction in the pile group as the monitoring piles. If they are not the same, then a second preset number of piles will be selected from the piles closest to the normal wave direction and a second preset number of piles will be selected from the piles closest to the strong wave direction as monitoring piles.

5. The method for assessing and warning the stability of pile groups considering the influence of environmental loads according to claim 1, characterized in that, The step of grouping all piles within the monitored water area based on the horizontal bearing capacity of the pile foundations includes: The horizontal bearing capacity of all pile foundations within the monitored water area was calculated and compared to obtain the maximum and minimum horizontal bearing capacity. The range between the minimum horizontal bearing capacity and the maximum horizontal bearing capacity is divided into a first preset number of group ranges; Pile foundations with horizontal bearing capacity within the same grouping range are classified into the same pile foundation group.

6. The method for assessing and warning the stability of pile groups considering the influence of environmental loads according to claim 1, characterized in that, It also includes a data acquisition base station, which includes a power distribution box, a pole, a data acquisition instrument, and a solar panel. The pole is set vertically, the solar panel is set at the top of the pole and electrically connected to the data acquisition instrument, the power distribution box and the data acquisition instrument are set on the pole, and the power distribution box is electrically connected to the data acquisition instrument. The data acquisition instrument is electrically connected to an inclinometer, an acceleration sensor and a pressure sensor, respectively.

7. The method for assessing and warning the stability of pile groups considering the influence of environmental loads according to claim 6, characterized in that, Support rods are provided on both sides of the pole and between the pole and the solar panel.

8. The method for assessing and warning the stability of pile groups considering the influence of environmental loads according to claim 1, characterized in that, The monitoring assembly also includes a first steel section and a second steel section. The first steel section is installed at the top of the pile foundation, and the inclinometer and acceleration sensor are set on the first steel section. The second steel section is installed on the outer wall of the pile foundation and is vertically arranged. A plurality of pressure sensors are arranged at intervals from top to bottom on the second steel section.

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