Offshore wind power underwater pile sinking and conveying device and energy loss evaluation method thereof
By installing sensors on the offshore wind power underwater pile driver and conducting stress wave theory analysis, the problem of difficult energy loss quantification was solved, real-time assessment of energy loss and precise control of pile driving depth were achieved, avoiding damage to the pile body.
Patent Information
- Application Number
- CN202511084479.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-04
- Publication Date
- 2025-10-17
AI Technical Summary
Existing technologies lack real-time quantitative assessment of the energy loss of offshore wind power underwater pile drivers, resulting in difficulty in controlling hammering energy loss parameters and easily causing pile damage, such as excessive hammering leading to steel pipe pile buckling or insufficient sinking depth.
An offshore wind power underwater pile driver is designed. It is equipped with sensors and acceleration sensors. The stress wave theory is used to analyze and fit the hammer energy change curve, calculate the energy loss coefficient, reduce the energy transfer interface loss, and ensure the concentric alignment of the pile driver and the steel pipe pile through the guide.
It realizes the real-time quantitative evaluation of hammer energy loss, reduces the energy transfer interface loss, avoids pile body damage, and ensures the accuracy and safety of pile driving depth.
Smart Images
Figure CN120797671A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of underwater pile sinking, in particular to an offshore wind power underwater pile sinking pile delivery device and an energy loss evaluation method thereof. BACKGROUND
[0002] Pile sinking is a construction method for sinking a prefabricated pile into the foundation, and the pile diameter is usually 0.6 meters, mainly applied in industrial and civil building fields. This method sinks reinforced concrete, prestressed concrete or steel-wood pile to the designed depth by mechanical external force, including driving pile, vibration pile sinking, static pile pressing and other process forms, and is suitable for plastic clay, sandy soil, silt and loose broken pebble land layers.
[0003] With the gradual development of offshore wind power to deep sea, the application of jacket foundations is becoming more and more widespread. The jacket foundation includes an underwater pile foundation and a jacket body, wherein the underwater pile foundation needs to be sunk to the elevation of the mud surface, so a pile delivery device is needed to convert the underwater pile sinking into water pile sinking. The use of such a long pile delivery device will cause the loss of hammering energy. When the hammering energy is transmitted to the underwater pile foundation through the pile delivery device, the energy is attenuated due to steel structure vibration, pile-soil interaction, etc. The existing technology lacks real-time quantitative evaluation means, and only relies on experience to control the number of hammering, which is easy to cause pile damage such as excessive hammering leading to steel pipe pile buckling or insufficient pile sinking depth. Therefore, the parameters of hammering energy loss are particularly important for pile hammer selection and hammering pile control. SUMMARY
[0004] In view of the deficiencies of the prior art, the present application provides an offshore wind power underwater pile sinking pile delivery device and an energy loss evaluation method thereof, which solves the problems mentioned in the background.
[0005] The present application provides the following technical scheme: an offshore wind power underwater pile sinking pile delivery device, comprising: a steel structure body with a diameter equal to that of the underwater pile foundation, an upper replacement part is arranged at the top of the steel structure body, a lower replacement part is arranged at the bottom end of the steel structure body, and a guide piece is arranged at the bottom end of the lower replacement part;
[0006] The guide piece comprises a limiting section and a reduced diameter conical section connected with the limiting section, and the outer diameter of the limiting section is 2cm smaller than that of the underwater pile foundation;
[0007] The steel structure body cylinder outer wall is provided with a plurality of scale lines along the axial direction.
[0008] Preferably, the upper replacement part is a forging part, and the diameter of the upper replacement part is consistent with that of the steel structure body;
[0009] The lower replacement part is a forging part, and the diameter of the lower replacement part is consistent with that of the steel structure body.
[0010] Preferably, the cylinder of the steel structure body is symmetrically provided with lifting lugs (5) outside, and the inner wall of the guide is provided with reinforcing ribs.
[0011] Preferably, the scale lines are set at intervals of 0.1 m in a 0-2 m range below the top of the steel structure body, and at intervals of 0.5 m below 2 m.
[0012] An energy loss evaluation method of a marine wind power underwater pile sinking device, comprising the following steps:
[0013] Step S1, sensor installation:
[0014] A first pair of strain sensors and a first pair of acceleration sensors are installed on the surface of the steel structure body of the pile sinking device;
[0015] The pile sinking device is hoisted to the top of the underwater pile foundation for sinking;
[0016] A second pair of strain sensors and a second pair of acceleration sensors are installed on the surface of the underwater pile foundation by divers;
[0017] Step S2, synchronous detection:
[0018] The first pair of strain sensors and the first pair of acceleration sensors are connected to pile analysis instrument 1, and the second pair of strain sensors and the second pair of acceleration sensors are connected to pile analysis instrument 2, and strain signals and acceleration signals of the pile sinking device and the underwater pile foundation are synchronously collected;
[0019] The signals are converted into force values and velocity values, and the effective energy variation curve of the top of the pile sinking device and the top of the underwater pile foundation with the number of hammering and the static soil resistance variation curve with the number of hammering are obtained by stress wave theory analysis and fitting;
[0020] Step S3, correlation analysis:
[0021] The operator measures the effective energy variation curve of the top of the underwater pile foundation and the top of the pile sinking device with the number of hammering and the static soil resistance variation curve with the number of hammering, and performs correlation analysis;
[0022] Step S4, loss coefficient calculation:
[0023] According to the correlation parameters of step S3, the energy loss coefficient of the pile sinking device is calculated.
[0024] Preferably, in step S1, the surface of the steel structure body is provided with a first screw hole for installing the first pair of strain sensors and the first pair of acceleration sensors, and the distance from the first screw hole to the top of the steel structure body is 16 m.
[0025] The surface of the underwater pile foundation is provided with a second screw hole for mounting a second pair of strain sensors and a second pair of acceleration sensors, and the distance from the second screw hole to the top of the underwater pile foundation is 2.5 m.
[0026] Preferably, in the step S2, the first pair of strain sensors and the first pair of acceleration sensors and the second pair of strain sensors and the second pair of acceleration sensors respectively input the measured strain signals and acceleration signals into the pile analysis instrument one and the pile analysis instrument two host through low-noise shielded cables, and are respectively converted into force and speed signal and displayed on the monitor screen.
[0027] Compared with the prior art, the present application has the following beneficial effects:
[0028] 1. In the present application, the first pair of strain sensors and the first pair of acceleration sensors and the second pair of strain sensors and the second pair of acceleration sensors respectively input the measured strain signals and acceleration signals into the pile analysis instrument one and the pile analysis instrument two host through low-noise shielded cables, and the effective energy variation curve of the pile driver top and the underwater pile foundation top with the number of hammering and the static soil resistance variation curve with the number of hammering are obtained by stress wave theory analysis and fitting, and the effective energy variation curve of the underwater pile foundation top and the pile driver top with the number of hammering and the static soil resistance variation curve with the number of hammering are analyzed by the operator, and the energy loss coefficient of the pile driver is calculated.
[0029] 2. In the present application, the upper and lower replacement parts are arranged to reduce the energy transmission interface loss, the limiting section of the guide and the reduced taper section connected with the limiting section facilitate the concentric alignment of the pile driver and the steel pipe pile, and avoid energy loss caused by deviation. BRIEF DESCRIPTION OF DRAWINGS
[0030] Fig. 1 It is a structural schematic diagram of the present application;
[0031] Fig. 2 It is a connection schematic diagram of the pile analysis instrument one and the pile analysis instrument two of the present application;
[0032] Fig. 3 It is a flowchart of the present application.
[0033] In the figure: 1, underwater pile foundation; 2, guide; 3, lower replacement part; 4, scale line; 5, lifting lug; 6, upper replacement part; 7, reinforcing rib plate; 8, steel structure body. DETAILED DESCRIPTION
[0034] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.
[0035] Please refer to Figs. 1-3 A pile delivery device for offshore wind power underwater pile sinking, comprising: a steel structure body 8 with a diameter equal to that of the underwater pile foundation 1, for transmitting hammering energy, an upper striking part 6 provided at the top of the steel structure body 8, for bearing the impact load of the hydraulic hammer, a lower striking part 3 provided at the bottom end of the steel structure body 8, for transmitting energy to the underwater pile foundation 1, and a guide 2 provided at the bottom end of the lower striking part 3.
[0036] The guide 2 comprises a limiting section and a reduced-diameter conical section connected with the limiting section, and the outer diameter of the limiting section is 2 cm smaller than that of the underwater pile foundation 1.
[0037] The outer wall of the cylinder of the steel structure body 8 is provided with a plurality of scale lines 4 along the axial direction, for measuring the sinking elevation.
[0038] The upper striking part 6 is a forged part, and the diameter of the upper striking part 6 is consistent with that of the steel structure body 8, and the lower striking part 3 is a forged part, and the diameter of the lower striking part 3 is consistent with that of the steel structure body 8.
[0039] The outer side of the cylinder of the steel structure body 8 is symmetrically provided with lifting lugs 5 for lifting, and the inner wall of the guide 2 is provided with reinforcing ribs 7.
[0040] The scale lines 4 take the top of the steel structure body 8 as a reference, and the adjacent scale lines 4 in the range of 0-2 m are arranged at an interval of 0.1 m, and the adjacent scale lines 4 below 2 m are arranged at an interval of 0.5 m.
[0041] An energy loss evaluation method of a pile delivery device for offshore wind power underwater pile sinking, comprising the following steps:
[0042] Step S1, sensor installation:
[0043] A first pair of strain sensors and a first pair of acceleration sensors are installed on the surface of the steel structure body 8 of the pile delivery device;
[0044] The pile delivery device is lifted to the top of the underwater pile foundation 1 for pile sinking;
[0045] A second pair of strain sensors and a second pair of acceleration sensors are installed on the surface of the underwater pile foundation 1 by a diver;
[0046] Step S2, synchronous detection:
[0047] The first pair of strain sensors and the first pair of acceleration sensors are connected to a pile driving analyzer 1, and the second pair of strain sensors and the second pair of acceleration sensors are connected to a pile driving analyzer 2, and the strain signals and the acceleration signals of the pile driver and the underwater pile 1 are synchronously collected;
[0048] The signals are converted into force values and velocity values, and the effective energy curve of the top of the pile driver and the top of the underwater pile 1 with the number of hammering and the static soil resistance curve with the number of hammering are obtained through stress wave theory analysis and fitting;
[0049] Step S3, correlation analysis:
[0050] The operator performs correlation analysis on the effective energy curve of the top of the underwater pile 1 and the top of the pile driver with the number of hammering and the static soil resistance curve with the number of hammering;
[0051] Specifically, the operator fits the effective energy curve of the top of the underwater pile and the top of the pile driver with the number of hammering and the static soil resistance curve with the number of hammering according to the CAPWAP method
[0052] Step S4, loss coefficient calculation: according to the correlation parameter of step S3, the energy loss coefficient of the pile driver is calculated, and the energy loss coefficient of the pile driver is calculated through the ratio relationship between the measured effective energy of the top of the pile driver and the measured effective energy of the top of the steel pipe pile.
[0053] In step S1, the surface of the steel structure body 8 is provided with a first screw hole for mounting the first pair of strain sensors and the first pair of acceleration sensors, and the distance from the first screw hole to the top of the steel structure body 8 is 16m;
[0054] The surface of the underwater pile 1 is provided with a second screw hole for mounting the second pair of strain sensors and the second pair of acceleration sensors, and the distance from the second screw hole to the top of the underwater pile 1 is 2.5m.
[0055] In step S2, the first pair of strain sensors and the first pair of acceleration sensors and the second pair of strain sensors and the second pair of acceleration sensors respectively input the measured strain signals and acceleration signals into the pile driving analyzer 1 and the pile driving analyzer 2 host through low-noise shielded cables, and are respectively converted into force and velocity signals and displayed on the monitor screen.
[0056] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. An offshore wind power underwater pile driver, characterized in that: include: A steel structure body (8) having a diameter equal to that of the underwater pile foundation (1), wherein an upper replacement part (6) is provided at the top of the steel structure body (8), a lower replacement part (3) is provided at the bottom end of the steel structure body (8), and a guide member (2) is provided at the bottom end of the lower replacement part (3); The guide member (2) comprises a limiting section and a tapered section connected to the limiting section, wherein the outer diameter of the limiting section is 2 cm smaller than the outer diameter of the underwater pile foundation (1); The outer wall of the cylinder of the steel structure body (8) is provided with a plurality of scale lines (4) along the axial direction.
2. The offshore wind power underwater pile driver according to claim 1, characterized in that: The upper replacement part (6) is a forged part, and the diameter of the upper replacement part (6) is consistent with the diameter of the steel structure body (8); The lower replacement part (3) is a forged part, and the diameter of the lower replacement part (3) is consistent with the diameter of the steel structure body (8).
3. The offshore wind power underwater pile driver according to claim 1, characterized in that: Lifting ears (5) are symmetrically arranged on the outer side of the cylinder of the steel structure body (8), and reinforcing ribs (7) are arranged on the inner wall of the guide member (2).
4. The offshore wind power underwater pile driver according to claim 1, characterized in that: The scale lines (4) are based on the top of the steel structure body (8), and the adjacent scale lines (4) in the 0-2m range downward are arranged at intervals of 0.1m, and the adjacent scale lines (4) in the area below 2m are arranged at intervals of 0.5m.
5. A method for evaluating energy loss of an offshore wind power underwater pile driver, characterized in that: The following steps are involved: Step S1, sensor installation: A first pair of strain sensors and a first pair of acceleration sensors are mounted on the surface of the steel structure body (8) of the pile driver; Lifting the pile driver to the top of the underwater pile foundation (1) to sink the pile; A diver installs a second pair of strain sensors and a second pair of acceleration sensors on the surface of the underwater pile foundation (1); Step S2, synchronous detection: The first pair of strain sensors and the first pair of acceleration sensors are connected to the pile driving analyzer 1, and the second pair of strain sensors and the second pair of acceleration sensors are connected to the pile driving analyzer 2, so as to synchronously collect strain signals and acceleration signals of the pile driver and the underwater pile foundation (1); The signal is converted into force value and velocity value, and the curve of effective energy variation with hammer blow number and the curve of static soil resistance variation with hammer blow number of the top of the pile driver and the top of the underwater pile foundation (1) are obtained by stress wave theory analysis and fitting; Step S3, correlation analysis: The operator conducts a correlation analysis on the curve of effective energy versus hammer blow number measured at the top of the underwater pile foundation (1) and the top of the pile driver and the curve of static soil resistance versus hammer blow number; Step S4, loss coefficient calculation: The energy loss coefficient of the pile driver is calculated based on the correlation parameters in step S3.
6. The energy loss assessment method for an offshore wind power underwater pile driver according to claim 5, characterized in that: In step S1, a first screw hole for mounting a first pair of strain sensors and a first pair of acceleration sensors is opened on the surface of the steel structure body (8), and the distance between the first screw hole and the top of the steel structure body (8) is 16m; The surface of the underwater pile foundation (1) is provided with second screw holes for installing a second pair of strain sensors and a second pair of acceleration sensors, and the distance between the second screw holes and the top of the underwater pile foundation (1) is 2.5 m.
7. The energy loss assessment method for an offshore wind power underwater pile driver according to claim 5, characterized in that: In step S2, the first pair of strain sensors and the first pair of acceleration sensors, as well as the second pair of strain sensors and the second pair of acceleration sensors, respectively input the measured strain signals and acceleration signals into the main units of the pile driving analyzer 1 and the pile driving analyzer 2 through low-noise shielded cables, and the signals are converted into force and velocity signals, respectively, and displayed on the monitoring screen.