Self-elevating platform instrumentation analysis method and device, storage medium and electronic equipment

Abstract

The invention belongs to the technical field of self-elevating platforms, and particularly relates to a self-elevating platform instrumentation analysis method and device, a computer readable storage medium, electronic equipment and a computer program product. The method comprises the steps that the first burial depth of a pile shoe of the self-elevating platform and the height of a soil plug are determined, and the second burial depth of the combined foundation is determined according to the first burial depth and the height of the soil plug; a current soil layer where the second burial depth is located is determined, and a target soil layer set related to the bottom bearing capacity of the combined foundation is determined according to the current soil layer; the bearing mechanism of the combined foundation is determined according to the target soil layer set, and the bottom bearing capacity of the combined foundation is determined based on the bearing mechanism; and determining the lateral shear force on the vertical failure surface from the first burial depth to the second burial depth, the soil buoyancy per unit area and the soil covering stress after the reflow soil weight is deducted, and determining the total bearing capacity corresponding to the first burial depth, so that a more accurate analysis result can be obtained.

Description

Technical Field

[0001] The present application belongs to the technical field of jack-up platforms, and in particular relates to a jack-up platform pile analysis method, device, computer-readable storage medium, electronic device, and computer program product. Background Art

[0002] Offshore sedimentary environments are complex, with layered soil structures common across different seabeds. The physical and mechanical properties of these layered soils vary significantly. When operating under complex geological conditions, the bearing mechanisms of the pile shoe foundations of jack-up platforms can exhibit significant variations. In particular, when encountering hard-top, soft-bottom strata, the pile shoe can rapidly settle during pile insertion, penetrating the upper hard soil into the lower soft soil, triggering shear failure in the foundation. This penetration behavior can not only damage the lifting mechanism but also impact the platform's main structure, posing a threat to the safety of the entire platform. Conversely, in soft-top, hard-bottom strata, the pile shoe settles more slowly during penetration, as the soft soil beneath the hard soil layer pushes it to the sides. However, the variability of seabed geological conditions means that foundation soils often exhibit a high degree of stratification in actual projects. During pile insertion operations in complex, layered soil conditions, the foundation bearing mechanism undergoes multiple phases of change, posing a significant challenge to accurately analyzing the foundation's bearing capacity. The existing jack-up platform pile driving analysis method is difficult to accurately describe the foundation failure mode during the process of penetrating multiple layers of complex marine foundation soil, resulting in poor accuracy of the analysis results. Summary of the Invention

[0003] In view of this, embodiments of the present application provide a self-elevating platform pile insertion analysis method, device, computer-readable storage medium, electronic device and computer program product to solve the problem that the self-elevating platform pile insertion analysis method in the prior art is difficult to accurately describe the foundation failure mode during the process of penetrating multiple layers of complex marine foundation soil, resulting in poor accuracy of the analysis results obtained.

[0004] A first aspect of an embodiment of the present application provides a jack-up platform pile insertion analysis method, which may include:

[0005] Determining a first embedment depth and a soil plug height of a pile shoe of the jack-up platform, and determining a second embedment depth of the composite foundation based on the first embedment depth and the soil plug height;

[0006] determining a current soil layer at the second burial depth, and determining a target soil layer set related to the bottom bearing capacity of the combined foundation based on the current soil layer;

[0007] determining a bearing mechanism of the combined foundation according to the target soil layer set, and determining a bottom bearing capacity of the combined foundation based on the bearing mechanism;

[0008] determining the lateral shear force, the soil buoyancy per unit area, and the cover stress after deducting the weight of the backflow soil on the vertical failure surface from the first burial depth to the second burial depth;

[0009] A total bearing capacity corresponding to the first burial depth is determined according to the bottom bearing capacity, the lateral shear force, the soil buoyancy, and the cover stress.

[0010] In a specific implementation of the first aspect, after determining the bottom bearing capacity of the combined foundation based on the bearing mechanism, the method may further include:

[0011] When the height of the soil plug is greater than a preset height threshold, determining the major principal stress of the soil plug under a limit state;

[0012] Perform soil plug stability judgment based on the bottom bearing capacity and the major principal stress to obtain a soil plug stability judgment result;

[0013] When the soil plug stability judgment result is that the soil plug is unstable, the bottom bearing capacity is corrected according to the major principal stress to obtain the corrected bottom bearing capacity.

[0014] In a specific implementation of the first aspect, determining, based on the current soil layer, a target soil layer set related to the bottom bearing capacity of the combined foundation may include:

[0015] In a case where the current soil layer is a sand layer, determining a target soil layer set related to the bottom bearing capacity of the combined foundation according to the current soil layer thickness and the pile shoe diameter;

[0016] In the case that the current soil layer is a clay layer, the current soil layer and soil layers within a preset range below are determined as a target soil layer set related to the bottom bearing capacity of the combined foundation.

[0017] In a specific implementation of the first aspect, determining the target soil layer set related to the bottom bearing capacity of the combined foundation based on the current soil layer thickness and the pile shoe diameter may include:

[0018] In a case where the thickness of the current soil layer is greater than the diameter of the pile shoe, determining the current soil layer as a target soil layer set related to the bottom bearing capacity of the composite foundation;

[0019] When the thickness of the current soil layer is less than or equal to the diameter of the pile shoe, a target soil layer set related to the bottom bearing capacity of the composite foundation is determined according to the thickness of the clay layer below the current soil layer and the radius of the pile shoe.

[0020] In a specific implementation of the first aspect, determining the target soil layer set related to the bottom bearing capacity of the composite foundation based on the thickness of the clay layer below the current soil layer and the radius of the pile shoe may include:

[0021] In a case where the thickness of the clay layer is greater than the radius of the pile shoe, the current soil layer and the next clay layer are determined as a target soil layer set related to the bottom bearing capacity of the composite foundation;

[0022] In the case where the thickness of the clay layer is less than or equal to the radius of the pile shoe, the current soil layer and the next two soil layers are determined as a target soil layer set related to the bottom bearing capacity of the composite foundation.

[0023] In a specific implementation of the first aspect, determining the bearing mechanism of the combined foundation according to the target soil layer set may include:

[0024] When the number of soil layers in the target soil layer set is one, determining that the bearing mechanism of the combined foundation is a homogeneous soil bearing mechanism;

[0025] When the number of soil layers in the target soil layer set is greater than one, the current soil layer is a clay layer, the next soil layer is a clay layer, and the strength of the current soil layer is less than the strength of the next soil layer; or when the number of soil layers in the target soil layer set is greater than one, the current soil layer is a clay layer, and the next soil layer is a sand layer, determining that the bearing mechanism of the composite foundation is a compression mechanism;

[0026] When the number of soil layers in the target soil layer set is greater than one, the current soil layer is a sand layer, and the next soil layer is a clay layer, or when the number of soil layers in the target soil layer set is greater than one, the current soil layer is a clay layer, the next soil layer is a clay layer, and the strength of the next soil layer is less than a preset proportion of the current soil layer, it is determined that the bearing mechanism of the composite foundation is a puncture mechanism.

[0027] In a specific implementation of the first aspect, after determining the total bearing capacity corresponding to the first burial depth, the method may further include:

[0028] The first burial depth and the soil plug height are updated, and the step of determining the second burial depth of the combined foundation based on the first burial depth and the soil plug height and subsequent steps are returned to execute until a preset termination condition is met.

[0029] In a specific implementation of the first aspect, the jack-up platform pile insertion analysis method may further include:

[0030] When the termination condition is met, a relationship curve between the installation resistance of the pile shoe and the penetration depth is constructed according to the total bearing capacity corresponding to the first burial depth determined previously.

[0031] A second aspect of an embodiment of the present application provides a jack-up platform pile insertion analysis device, which may include:

[0032] a combined foundation burial depth determination module, configured to determine a first burial depth and a soil plug height of a pile shoe of a jack-up platform, and determine a second burial depth of the combined foundation based on the first burial depth and the soil plug height;

[0033] a target soil layer set determining module, configured to determine a current soil layer at the second burial depth, and determine a target soil layer set related to the bottom bearing capacity of the combined foundation based on the current soil layer;

[0034] a bearing mechanism determination module, configured to determine the bearing mechanism of the combined foundation according to the target soil layer set, and determine the bottom bearing capacity of the combined foundation based on the bearing mechanism;

[0035] Each force determination module is used to determine the lateral shear force, the soil buoyancy per unit area, and the cover stress after deducting the weight of the returned soil on the vertical failure surface from the first burial depth to the second burial depth;

[0036] A total bearing capacity determination module is used to determine the total bearing capacity corresponding to the first burial depth based on the bottom bearing capacity, the lateral shear force, the soil buoyancy and the cover stress.

[0037] In a specific implementation of the second aspect, the jack-up platform pile insertion analysis device may further include:

[0038] a major principal stress determination module, configured to determine the major principal stress of the soil plug under a limit state when the height of the soil plug is greater than a preset height threshold;

[0039] a soil plug stability judgment module, configured to judge the soil plug stability based on the bottom bearing capacity and the major principal stress, and obtain a soil plug stability judgment result;

[0040] The bottom bearing capacity correction module is used to correct the bottom bearing capacity according to the major principal stress when the soil plug stability judgment result is that the soil plug is unstable, so as to obtain the corrected bottom bearing capacity.

[0041] In a specific implementation of the second aspect, the target soil layer set determination module may include:

[0042] A first target soil layer set determination submodule is configured to determine, when the current soil layer is a sand layer, a target soil layer set related to the bottom bearing capacity of the composite foundation according to the current soil layer thickness and the pile shoe diameter;

[0043] The second target soil layer set determination submodule is used to determine the current soil layer and the soil layers within a preset range below as the target soil layer set related to the bottom bearing capacity of the composite foundation when the current soil layer is a clay layer.

[0044] In a specific implementation of the second aspect, the first target soil layer set determination submodule may include:

[0045] a first determining unit, configured to determine the current soil layer as a target soil layer set related to the bottom bearing capacity of the combined foundation when the thickness of the current soil layer is greater than the diameter of the pile shoe;

[0046] The second determination unit is used to determine the target soil layer set related to the bottom bearing capacity of the combined foundation according to the clay layer thickness and the pile shoe radius below the current soil layer when the current soil layer thickness is less than or equal to the pile shoe diameter.

[0047] In a specific implementation of the second aspect, the second determination unit can be specifically used to: when the thickness of the clay layer is greater than the pile shoe radius, determine the current soil layer and the next clay layer as a target soil layer set related to the bottom bearing capacity of the combined foundation; when the thickness of the clay layer is less than or equal to the pile shoe radius, determine the current soil layer and the next two soil layers as a target soil layer set related to the bottom bearing capacity of the combined foundation.

[0048] In a specific implementation of the second aspect, the bearing mechanism determination module may include:

[0049] a homogeneous soil bearing mechanism determination submodule, configured to determine that the bearing mechanism of the combined foundation is a homogeneous soil bearing mechanism when the number of soil layers in the target soil layer set is one;

[0050] a squeezing mechanism determination submodule, configured to determine that the bearing mechanism of the composite foundation is a squeezing mechanism when the number of soil layers in the target soil layer set is greater than one, the current soil layer is a clay layer, the next soil layer is a clay layer, and the strength of the current soil layer is less than the strength of the next soil layer; or when the number of soil layers in the target soil layer set is greater than one, the current soil layer is a clay layer, and the next soil layer is a sand layer;

[0051] The puncture mechanism determination submodule is used to determine that the bearing mechanism of the composite foundation is a puncture mechanism when the number of soil layers in the target soil layer set is greater than one, the current soil layer is a sand layer, and the next soil layer is a clay layer; or when the number of soil layers in the target soil layer set is greater than one, the current soil layer is a clay layer, the next soil layer is a clay layer, and the strength of the next soil layer is less than a preset proportion of the current soil layer.

[0052] In a specific implementation of the second aspect, the jack-up platform pile insertion analysis device may further include:

[0053] An updating module is used to update the first burial depth and the soil plug height, and return to execute the step of determining the second burial depth of the combined foundation based on the first burial depth and the soil plug height and its subsequent steps until a preset termination condition is met.

[0054] In a specific implementation of the embodiment of the present application, the jack-up platform pile insertion analysis device may further include:

[0055] A relationship curve construction module is used to construct a relationship curve between the pile shoe installation resistance and the penetration depth according to the total bearing capacity corresponding to the first burial depth determined previously when the termination condition is met.

[0056] A third aspect of an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of any of the above-mentioned self-elevating platform pile insertion analysis methods are implemented.

[0057] A fourth aspect of an embodiment of the present application provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any one of the above-mentioned self-elevating platform pile insertion analysis methods when executing the computer program.

[0058] A fifth aspect of the embodiments of the present application provides a computer program product. When the computer program product is run on an electronic device, the electronic device executes the steps of any one of the above-mentioned self-elevating platform pile insertion analysis methods.

[0059] Compared with the prior art, the embodiments of the present application have the following beneficial effects: the embodiments of the present application determine the first buried depth and soil plug height of the pile shoe of the jack-up platform, and determine the second buried depth of the combined foundation based on the first buried depth and the soil plug height; determine the current soil layer where the second buried depth is located, and determine the target soil layer set related to the bottom bearing capacity of the combined foundation based on the current soil layer; determine the bearing mechanism of the combined foundation based on the target soil layer set, and determine the bottom bearing capacity of the combined foundation based on the bearing mechanism; determine the lateral shear force, soil buoyancy per unit area, and overburden stress after deducting the weight of the returned soil on the vertical failure surface from the first buried depth to the second buried depth; determine the total bearing capacity corresponding to the first buried depth based on the bottom bearing capacity, the lateral shear force, the soil buoyancy, and the overburden stress. Through the embodiments of the present application, the foundation failure mode in the process of penetrating multiple layers of complex marine foundation soil can be described more accurately, thereby obtaining more accurate analysis results. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0061] Figure 1 This is a flow chart of an embodiment of a method for analyzing pile insertion of a jack-up platform in an embodiment of the present application;

[0062] Figure 2 A comparison diagram of the relationship between the technical solution of the embodiment of the present application and the existing technical solution and the pile shoe installation resistance-penetration depth curve of the centrifuge test;

[0063] Figure 3 This is a structural diagram of an embodiment of a self-elevating platform pile insertion analysis device in an embodiment of the present application;

[0064] Figure 4 This is a schematic block diagram of an electronic device in an embodiment of the present application. DETAILED DESCRIPTION

[0065] In order to make the purpose, features, and advantages of the invention of this application more obvious and easy to understand, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described below are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0066] It will be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0067] It should also be understood that the terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0068] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0069] As used in this specification and the appended claims, the term "if" can be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0070] In addition, in the description of the present application, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0071] Offshore sedimentary environments are complex, with layered soil structures common across different seabeds. The physical and mechanical properties of these layered soils vary significantly. When operating under complex geological conditions, the bearing mechanisms of the pile shoe foundations of jack-up platforms can exhibit significant variations. In particular, when encountering hard-top, soft-bottom strata, the pile shoe can rapidly settle during pile insertion, penetrating the upper hard soil into the lower soft soil, triggering shear failure in the foundation. This penetration behavior can not only damage the lifting mechanism but also impact the platform's main structure, posing a threat to the safety of the entire platform. Conversely, in soft-top, hard-bottom strata, the pile shoe settles more slowly during penetration, as the soft soil beneath the hard soil layer pushes it to the sides. However, the variability of seabed geological conditions means that foundation soils often exhibit a high degree of stratification in actual projects. During pile insertion operations in complex, layered soil conditions, the foundation bearing mechanism undergoes multiple phases of change, posing a significant challenge to accurately analyzing the foundation's bearing capacity. The existing jack-up platform pile driving analysis method is difficult to accurately describe the foundation failure mode during the process of penetrating multiple layers of complex marine foundation soil, resulting in poor accuracy of the analysis results.

[0072] In view of this, embodiments of the present application provide a self-elevating platform pile insertion analysis method, device, computer-readable storage medium, electronic device and computer program product to solve the problem that the self-elevating platform pile insertion analysis method in the prior art is difficult to accurately describe the foundation failure mode during the process of penetrating multiple layers of complex marine foundation soil, resulting in poor accuracy of the analysis results obtained.

[0073] The execution subject of the embodiments of the present application may be an electronic device, which may include but is not limited to computing devices such as desktop computers, notebooks, PDAs, and servers.

[0074] See also Figure 1 In an embodiment of the present application, a method for analyzing pile insertion of a jack-up platform may include:

[0075] Step S101: Determine a first embedment depth and a soil plug height of a pile shoe of a jack-up platform, and determine a second embedment depth of a composite foundation based on the first embedment depth and the soil plug height.

[0076] In the embodiment of the present application, the first buried depth of the pile shoe can be recorded as d, and the height of the soil plug can be recorded as h. p , taking the seabed surface as the starting reference, the first burial depth and soil plug height can be initialized to 0, that is: d = 0, h p =0.

[0077] In the embodiment of the present application, the pile shoe and the soil plug can be regarded as a combined foundation as a whole, and the second buried depth of the combined foundation is recorded as d f, where the second burial depth is the sum of the first burial depth and the soil plug height, as shown in the following formula: f =d+h p .

[0078] Step S102: Determine the current soil layer where the second burial depth is located, and determine a target soil layer set related to the bottom bearing capacity of the combined foundation based on the current soil layer.

[0079] The target soil layer set may include at most three soil layers including the current soil layer.

[0080] When the current soil layer is a sandy soil layer, the target soil layer set related to the bottom bearing capacity of the composite foundation can be determined according to the current soil layer thickness and the pile shoe diameter (denoted as D).

[0081] In the case that the thickness of the current soil layer is greater than the diameter of the pile shoe, the current soil layer can be determined as the target soil layer set related to the bottom bearing capacity of the composite foundation.

[0082] When the thickness of the current soil layer is less than or equal to the diameter of the pile shoe, the target soil layer set related to the bottom bearing capacity of the combined foundation can be determined based on the thickness of the clay layer below the current soil layer and the pile shoe radius (i.e., 0.5D). Specifically, when the thickness of the clay layer is greater than the pile shoe radius, the current soil layer and the next clay layer can be determined as the target soil layer set related to the bottom bearing capacity of the combined foundation; when the thickness of the clay layer is less than or equal to the pile shoe radius, the current soil layer and the next two soil layers can be determined as the target soil layer set related to the bottom bearing capacity of the combined foundation.

[0083] If the current soil layer is a clay layer, the current soil layer and the soil layers within a preset range below (e.g., within a 1D range below) can be determined as the target soil layer set related to the bottom bearing capacity of the composite foundation. It should be noted that if there are more than two soil layers within the preset range below, only the two soil layers closest to the current soil layer can be selected.

[0084] Step S103: determining the bearing mechanism of the combined foundation according to the target soil layer set, and determining the bottom bearing capacity of the combined foundation based on the bearing mechanism.

[0085] In the embodiment of the present application, the bearing mechanism may include but is not limited to a homogeneous soil bearing mechanism, an extrusion mechanism, a puncture mechanism, and the like.

[0086] When the number of soil layers in the target soil layer set is one, it can be determined that the bearing mechanism of the composite foundation is the homogeneous soil bearing mechanism.

[0087] For clay, the bottom bearing capacity can be calculated according to the following formula:

[0088] q b=N c s c d c t c s u

[0089] Among them, N c is the bearing capacity coefficient, s c is the shape correction factor, d c is the depth correction factor, N c 、s c and d c You can follow the Skempton method to get the value, s u is the undrained shear strength of clay, which can be taken as the average strength within 0.5D below the combined foundation, t c To correct the thickness of the composite foundation, t is the thickness of the combined foundation, q b is the bottom bearing capacity.

[0090] For sandy soil, the bottom bearing capacity can be calculated according to the following formula:

[0091]

[0092] Among them, N γ and N q is the bearing capacity coefficient, s γ and s q is the shape correction factor, N γ 、N q 、s γ and s q The value can be obtained according to the Vesic method, where γ' is the buoyant density of the soil and p'0 is the overburden effective pressure at the depth of the lowest point of the maximum cross-section of the pile shoe.

[0093] When the number of soil layers in the target soil layer set is greater than one, the current soil layer is a clay layer, the next soil layer is a clay layer, and the strength of the current soil layer is less than the strength of the next soil layer; or when the number of soil layers in the target soil layer set is greater than one, the current soil layer is a clay layer, and the next soil layer is a sand layer, it can be determined that the bearing mechanism of the composite foundation is the compression mechanism.

[0094] The bottom bearing capacity can be calculated using the Meyer method for the extrusion mechanism, as shown below:

[0095] q b =N c N sq s c d c t c s u

[0096]

[0097] s u2m is the surface strength of the next layer of soil, T is the distance from the combined foundation to the surface of the next layer of soil, and R is the radius of the pile shoe.

[0098] When the number of soil layers in the target soil layer set is greater than one, the current soil layer is a sand layer, and the next soil layer is a clay layer; or when the number of soil layers in the target soil layer set is greater than one, the current soil layer is a clay layer, the next soil layer is a clay layer, and the strength of the next soil layer is less than a preset proportion of the current soil layer, it can be determined that the bearing mechanism of the composite foundation is a puncture mechanism.

[0099] When the current soil layer is a clay layer and the number of soil layers in the target soil layer set is two, the bottom bearing capacity can be calculated using the Meyerhof method for the penetration mechanism, as shown in the following formula:

[0100]

[0101] Among them, s u,t is the average strength of the current soil layer, s u,b It is the average strength within 0.5D below the surface of the next layer of soil.

[0102] If there are three soil layers in the target soil layer set, and the third soil layer is sandy or its surface strength is greater than the average strength of the second soil layer, the Meyer method can be used to calculate N in the Meyerhof formula. c When the third soil layer is a clay layer and its surface strength is less than the average strength of the second soil layer, the bottom bearing capacity can be calculated according to the following formula:

[0103]

[0104] Where t1 is the thickness of the first soil layer, t2 is the thickness of the second soil layer, and s u,1 is the average strength of the first soil layer, s u,2 is the average strength of the second soil layer, s u,3 is the average strength of the third soil layer.

[0105] In the case where the current soil layer is a sandy soil layer, if there are two soil layers in the target soil layer set, the penetration mechanism can use the Hu method to calculate the bottom bearing capacity, as shown in the following formula:

[0106]

[0107] Among them, s um is the undrained shear strength at the interface between clay layer and sand layer, N c0is the bearing capacity coefficient of the clay layer foundation, q0 is the vertical load on the clay layer surface, E * is a parameter related to the friction angle and dilatancy angle of the sand layer, ψ is the dilatancy angle of the sand layer, h s is the thickness of the sand layer, γ′ s It is the floating density of the sand layer.

[0108] If there are three soil layers in the target soil layer set, when the third soil layer is a sandy soil layer or the surface strength is greater than the average strength of the second soil layer, the N in the Hu formula can be adjusted. c0 s um Multiply the term by N sq When the third soil layer is a clay layer and its surface strength is less than the average strength of the second soil layer, the (N c0 s um +q0+0.12γ′ s h s ) with Among them, s u3m is the surface strength of the third soil layer, h2 is the thickness of the second soil layer, s u2 is the average strength of the second soil layer.

[0109] When the height of the soil plug is greater than a preset height threshold (which can be set to 0), the stability of the soil plug can be further judged, and the bottom bearing capacity can be determined based on the stability of the soil plug. Specifically, the major principal stress of the soil plug under the limit state can be determined. Assuming that the soil plug is in a triaxial stress state, the major principal stress (denoted as σ1) of the soil plug under the limit state can be determined based on the maximum confining pressure that the surrounding soil can provide (denoted as σ3). Then, the stability of the soil plug can be judged based on the bottom bearing capacity and the major principal stress to obtain the result of the soil plug stability judgment: if the bottom bearing capacity is less than the major principal stress, the result of the soil plug stability judgment can be determined as the soil plug is stable. Conversely, if the bottom bearing capacity is greater than or equal to the major principal stress, the result of the soil plug stability judgment can be determined as the soil plug is unstable. In the case where the soil plug stability judgment result is that the soil plug is unstable, the bottom bearing capacity can be corrected according to the major principal stress to obtain the corrected bottom bearing capacity, that is: q b =σ1.

[0110] Step S104: Determine the lateral shear force on the vertical failure surface from the first burial depth to the second burial depth, the soil buoyancy per unit area, and the cover stress after deducting the weight of the returned soil.

[0111] Among them, the lateral shear force, soil buoyancy and cover stress can be calculated using any method in the existing technology according to actual conditions, and the embodiments of the present application do not make specific limitations on this.

[0112] Step S105: Determine the total bearing capacity corresponding to the first burial depth based on the bottom bearing capacity, lateral shear force, soil buoyancy, and overburden stress.

[0113] In the embodiment of the present application, the bottom bearing capacity, lateral shear force, soil buoyancy and cover stress can be summed to obtain the total bearing capacity corresponding to the first burial depth, which is recorded as q u .

[0114] When the bearing mechanism is a penetration mechanism, the first burial depth may be updated according to the current soil layer type, so that the combined foundation is located at the burial depth when the penetration mechanism is triggered.

[0115] Through the above process, a data point consisting of the first burial depth and the corresponding total bearing capacity can be obtained: (d,q u ), which will be used to construct a curve showing the relationship between the installation resistance of the pile shoe and the penetration depth.

[0116] After completing the calculation of a data point, the first burial depth and the soil plug height can be updated. Specifically, the first burial depth can be increased by a preset incremental step, that is: d = d + Δd, where Δd is the incremental step, and its specific value can be flexibly set according to actual conditions. The embodiment of the present application does not make specific restrictions on this. In the case where the bearing mechanism is a puncture mechanism, a new soil plug can be generated according to the current soil layer type and puncture situation. In the case of soil plug instability, the soil plug height can be reduced by a preset incremental step, that is: h p =h p -Δd.

[0117] After completing the update of the first embedment depth and the soil plug height, the calculation process for the next data point can be continued, i.e., returning to the step of determining the second embedment depth of the combined foundation based on the first embedment depth and the soil plug height and subsequent steps until a preset termination condition is met. The termination condition may be: the first embedment depth exceeds the depth of the preset last soil layer.

[0118] When the termination conditions are met, a relationship curve between the installation resistance of the pile shoe and the penetration depth can be constructed based on the total bearing capacity corresponding to the first burial depth determined previously. Figure 2 Shown is a comparison diagram of the relationship curve between the technical solution of the embodiment of the present application and the existing technical solution and the pile shoe installation resistance-penetration depth of the centrifuge test. It can be seen that the technical solution of the embodiment of the present application can obtain more accurate analysis results.

[0119] In summary, the embodiment of the present application determines the first buried depth and soil plug height of the pile shoe of the jack-up platform, and determines the second buried depth of the combined foundation based on the first buried depth and soil plug height; determines the current soil layer where the second buried depth is located, and determines the target soil layer set related to the bottom bearing capacity of the combined foundation based on the current soil layer; determines the bearing mechanism of the combined foundation based on the target soil layer set, and determines the bottom bearing capacity of the combined foundation based on the bearing mechanism; determines the lateral shear force, soil buoyancy per unit area and overburden stress after deducting the weight of the return soil on the vertical failure surface from the first buried depth to the second buried depth; determines the total bearing capacity corresponding to the first buried depth based on the bottom bearing capacity, lateral shear force, soil buoyancy and overburden stress. Through the embodiment of the present application, the foundation failure mode in the process of penetrating multiple layers of complex marine foundation soil can be described more accurately, thereby obtaining more accurate analysis results.

[0120] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0121] Corresponding to the self-elevating platform pile insertion analysis method described in the above embodiment, Figure 3 A structural diagram of an embodiment of a self-elevating platform pile insertion analysis device provided in an embodiment of the present application is shown.

[0122] In this embodiment, a jack-up platform pile insertion analysis device may include:

[0123] The combined foundation burial depth determination module 301 is configured to determine a first burial depth and a soil plug height of a pile shoe of a jack-up platform, and determine a second burial depth of the combined foundation based on the first burial depth and the soil plug height;

[0124] a target soil layer set determining module 302, configured to determine a current soil layer at the second burial depth, and determine a target soil layer set related to the bottom bearing capacity of the composite foundation based on the current soil layer;

[0125] A bearing mechanism determination module 303 is configured to determine the bearing mechanism of the combined foundation according to the target soil layer set, and determine the bottom bearing capacity of the combined foundation based on the bearing mechanism;

[0126] The force determination module 304 is configured to determine the lateral shear force, the soil buoyancy per unit area, and the cover stress after deducting the weight of the returned soil on the vertical failure surface from the first burial depth to the second burial depth;

[0127] The total bearing capacity determination module 305 is configured to determine the total bearing capacity corresponding to the first burial depth according to the bottom bearing capacity, the lateral shear force, the soil buoyancy, and the overburden stress.

[0128] In a specific implementation of the embodiment of the present application, the jack-up platform pile insertion analysis device may further include:

[0129] a major principal stress determination module, configured to determine the major principal stress of the soil plug under a limit state when the height of the soil plug is greater than a preset height threshold;

[0130] a soil plug stability judgment module, configured to judge the soil plug stability based on the bottom bearing capacity and the major principal stress, and obtain a soil plug stability judgment result;

[0131] The bottom bearing capacity correction module is used to correct the bottom bearing capacity according to the major principal stress when the soil plug stability judgment result is that the soil plug is unstable, so as to obtain the corrected bottom bearing capacity.

[0132] In a specific implementation of the embodiment of the present application, the target soil layer set determination module may include:

[0133] A first target soil layer set determination submodule is configured to determine, when the current soil layer is a sand layer, a target soil layer set related to the bottom bearing capacity of the composite foundation according to the current soil layer thickness and the pile shoe diameter;

[0134] The second target soil layer set determination submodule is used to determine the current soil layer and the soil layers within a preset range below as the target soil layer set related to the bottom bearing capacity of the composite foundation when the current soil layer is a clay layer.

[0135] In a specific implementation of the embodiment of the present application, the first target soil layer set determination submodule may include:

[0136] a first determining unit, configured to determine the current soil layer as a target soil layer set related to the bottom bearing capacity of the combined foundation when the thickness of the current soil layer is greater than the diameter of the pile shoe;

[0137] The second determination unit is used to determine the target soil layer set related to the bottom bearing capacity of the combined foundation according to the clay layer thickness and the pile shoe radius below the current soil layer when the current soil layer thickness is less than or equal to the pile shoe diameter.

[0138] In a specific implementation of an embodiment of the present application, the second determination unit can be specifically used to: when the thickness of the clay layer is greater than the pile shoe radius, determine the current soil layer and the next clay layer as a target soil layer set related to the bottom bearing capacity of the combined foundation; when the thickness of the clay layer is less than or equal to the pile shoe radius, determine the current soil layer and the next two soil layers as a target soil layer set related to the bottom bearing capacity of the combined foundation.

[0139] In a specific implementation of the embodiment of the present application, the bearing mechanism determination module may include:

[0140] a homogeneous soil bearing mechanism determination submodule, configured to determine that the bearing mechanism of the combined foundation is a homogeneous soil bearing mechanism when the number of soil layers in the target soil layer set is one;

[0141] a squeezing mechanism determination submodule, configured to determine that the bearing mechanism of the composite foundation is a squeezing mechanism when the number of soil layers in the target soil layer set is greater than one, the current soil layer is a clay layer, the next soil layer is a clay layer, and the strength of the current soil layer is less than the strength of the next soil layer; or when the number of soil layers in the target soil layer set is greater than one, the current soil layer is a clay layer, and the next soil layer is a sand layer;

[0142] The puncture mechanism determination submodule is used to determine that the bearing mechanism of the composite foundation is a puncture mechanism when the number of soil layers in the target soil layer set is greater than one, the current soil layer is a sand layer, and the next soil layer is a clay layer; or when the number of soil layers in the target soil layer set is greater than one, the current soil layer is a clay layer, the next soil layer is a clay layer, and the strength of the next soil layer is less than a preset proportion of the current soil layer.

[0143] In a specific implementation of the embodiment of the present application, the jack-up platform pile insertion analysis device may further include:

[0144] An updating module is used to update the first burial depth and the soil plug height, and return to execute the step of determining the second burial depth of the combined foundation based on the first burial depth and the soil plug height and its subsequent steps until a preset termination condition is met.

[0145] In a specific implementation of the embodiment of the present application, the jack-up platform pile insertion analysis device may further include:

[0146] The relationship curve construction module is used to construct a relationship curve between the installation resistance of the pile shoe and the penetration depth according to the total bearing capacity corresponding to the first burial depth determined previously when the termination condition is met.

[0147] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described devices, modules and units can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0148] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0149] Figure 4 A schematic block diagram of an electronic device provided in an embodiment of the present application is shown. For ease of explanation, only the parts related to the embodiment of the present application are shown.

[0150] like Figure 4 As shown, the electronic device 4 of this embodiment includes: a processor 40, a memory 41, and a computer program 42 stored in the memory 41 and executable on the processor 40. When the processor 40 executes the computer program 42, the steps of each of the above-mentioned jack-up platform pile analysis method embodiments are implemented, such as Figure 1 Alternatively, when the processor 40 executes the computer program 42, the functions of the modules / units in the above-mentioned device embodiments are realized, for example, Figure 3 Functions of modules 301 to 305 are shown.

[0151] Exemplarily, the computer program 42 may be divided into one or more modules / units, which are stored in the memory 41 and executed by the processor 40 to implement the present application. The one or more modules / units may be a series of computer program instruction segments capable of implementing specific functions, and the instruction segments are used to describe the execution process of the computer program 42 in the electronic device 4.

[0152] The electronic device 4 may include but is not limited to desktop computers, notebooks, PDAs, servers and other computing devices. Those skilled in the art will understand that Figure 4 It is only an example of the electronic device 4 and does not constitute a limitation of the electronic device 4. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the electronic device 4 may also include input and output devices, network access devices, buses, etc.

[0153] The processor 40 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0154] The memory 41 may be an internal storage unit of the electronic device 4, such as a hard disk or memory of the electronic device 4. The memory 41 may also be an external storage device of the electronic device 4, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the electronic device 4. Furthermore, the memory 41 may include both an internal storage unit of the electronic device 4 and an external storage device. The memory 41 is used to store the computer program and other programs and data required by the electronic device 4. The memory 41 may also be used to temporarily store data that has been output or is about to be output.

[0155] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0156] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0157] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0158] In the embodiments provided in the present application, it should be understood that the disclosed devices / electronic devices and methods can be implemented in other ways. For example, the device / electronic device embodiments described above are merely schematic. For example, the division of the modules or units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0159] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0160] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0161] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the process in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by the processor, it can implement the steps of the above-mentioned various method embodiments. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable storage medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable storage medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable storage media do not include electric carrier signals and telecommunication signals.

[0162] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A method for analyzing pile insertion of a jack-up platform, characterized in that: include: Determining a first embedment depth and a soil plug height of a pile shoe of the jack-up platform, and determining a second embedment depth of the composite foundation based on the first embedment depth and the soil plug height; determining a current soil layer at the second burial depth, and determining a target soil layer set related to the bottom bearing capacity of the combined foundation based on the current soil layer; determining a bearing mechanism of the combined foundation according to the target soil layer set, and determining a bottom bearing capacity of the combined foundation based on the bearing mechanism; determining the lateral shear force, the soil buoyancy per unit area, and the cover stress after deducting the weight of the backflow soil on the vertical failure surface from the first burial depth to the second burial depth; A total bearing capacity corresponding to the first burial depth is determined according to the bottom bearing capacity, the lateral shear force, the soil buoyancy, and the cover stress.

2. The self-elevating platform pile driving analysis method according to claim 1, characterized in that: After determining the bottom bearing capacity of the combined foundation based on the bearing mechanism, the method further includes: When the height of the soil plug is greater than a preset height threshold, determining the major principal stress of the soil plug under a limit state; Perform soil plug stability judgment based on the bottom bearing capacity and the major principal stress to obtain a soil plug stability judgment result; When the soil plug stability judgment result is that the soil plug is unstable, the bottom bearing capacity is corrected according to the major principal stress to obtain the corrected bottom bearing capacity.

3. The self-elevating platform pile driving analysis method according to claim 1, characterized in that: The determining, based on the current soil layer, a target soil layer set related to the bottom bearing capacity of the combined foundation comprises: In a case where the current soil layer is a sand layer, determining a target soil layer set related to the bottom bearing capacity of the combined foundation according to the current soil layer thickness and the pile shoe diameter; In the case that the current soil layer is a clay layer, the current soil layer and soil layers within a preset range below are determined as a target soil layer set related to the bottom bearing capacity of the combined foundation.

4. The self-elevating platform pile driving analysis method according to claim 3, characterized in that: The step of determining a target soil layer set related to the bottom bearing capacity of the combined foundation based on the current soil layer thickness and the pile shoe diameter includes: In a case where the thickness of the current soil layer is greater than the diameter of the pile shoe, determining the current soil layer as a target soil layer set related to the bottom bearing capacity of the composite foundation; When the thickness of the current soil layer is less than or equal to the diameter of the pile shoe, a target soil layer set related to the bottom bearing capacity of the composite foundation is determined according to the thickness of the clay layer below the current soil layer and the radius of the pile shoe.

5. The self-elevating platform pile driving analysis method according to claim 4, characterized in that: The step of determining a target soil layer set related to the bottom bearing capacity of the combined foundation based on the thickness of the clay layer below the current soil layer and the radius of the pile shoe comprises: In a case where the thickness of the clay layer is greater than the radius of the pile shoe, the current soil layer and the next clay layer are determined as a target soil layer set related to the bottom bearing capacity of the composite foundation; In the case where the thickness of the clay layer is less than or equal to the radius of the pile shoe, the current soil layer and the next two soil layers are determined as a target soil layer set related to the bottom bearing capacity of the composite foundation.

6. The self-elevating platform pile driving analysis method according to claim 1, characterized in that: Determining the bearing mechanism of the combined foundation according to the target soil layer set includes: When the number of soil layers in the target soil layer set is one, determining that the bearing mechanism of the combined foundation is a homogeneous soil bearing mechanism; When the number of soil layers in the target soil layer set is greater than one, the current soil layer is a clay layer, the next soil layer is a clay layer, and the strength of the current soil layer is less than the strength of the next soil layer; or when the number of soil layers in the target soil layer set is greater than one, the current soil layer is a clay layer, and the next soil layer is a sand layer, determining that the bearing mechanism of the composite foundation is a compression mechanism; When the number of soil layers in the target soil layer set is greater than one, the current soil layer is a sand layer, and the next soil layer is a clay layer, or when the number of soil layers in the target soil layer set is greater than one, the current soil layer is a clay layer, the next soil layer is a clay layer, and the strength of the next soil layer is less than a preset proportion of the current soil layer, it is determined that the bearing mechanism of the composite foundation is a puncture mechanism.

7. The self-elevating platform pile driving analysis method according to any one of claims 1 to 6, characterized in that: After determining the total bearing capacity corresponding to the first burial depth, the method further includes: The first burial depth and the soil plug height are updated, and the step of determining the second burial depth of the combined foundation based on the first burial depth and the soil plug height and subsequent steps are returned to execute until a preset termination condition is met.

8. The jack-up platform pile driving analysis method according to claim 7, characterized in that: Also includes: When the termination condition is met, a relationship curve between the installation resistance of the pile shoe and the penetration depth is constructed according to the total bearing capacity corresponding to the first burial depth determined previously.

9. A self-elevating platform pile insertion analysis device, characterized in that: include: a combined foundation burial depth determination module, configured to determine a first burial depth and a soil plug height of a pile shoe of a jack-up platform, and determine a second burial depth of the combined foundation based on the first burial depth and the soil plug height; a target soil layer set determining module, configured to determine a current soil layer at the second burial depth, and determine a target soil layer set related to the bottom bearing capacity of the combined foundation based on the current soil layer; a bearing mechanism determination module, configured to determine the bearing mechanism of the combined foundation according to the target soil layer set, and determine the bottom bearing capacity of the combined foundation based on the bearing mechanism; Each force determination module is used to determine the lateral shear force, the soil buoyancy per unit area, and the cover stress after deducting the weight of the returned soil on the vertical failure surface from the first burial depth to the second burial depth; A total bearing capacity determination module is used to determine the total bearing capacity corresponding to the first burial depth based on the bottom bearing capacity, the lateral shear force, the soil buoyancy and the cover stress.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the jack-up platform pile instrumentation analysis method according to any one of claims 1 to 8 are implemented.

11. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the jack-up platform pile instrumentation analysis method according to any one of claims 1 to 8 are implemented.

12. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the jack-up platform pile instrumentation analysis method according to any one of claims 1 to 8 are implemented.

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