A navigation light pile for breakwater engineering and its construction method

Abstract

The present invention relates to the technical field of breakwater structures, and in particular to a navigation light post for use in breakwater projects and a construction method thereof. The navigation light post comprises a foundation consisting of a main root pile and a plurality of branch root piles, wherein the main root pile is a core vertical bearing column, and the branch root piles extend radially outward from the main root pile, with barbed anchor heads provided at the ends to enhance mechanical engagement with concrete; a foundation bearing platform; and a light post body. The construction method includes determining the force exerted by sea breezes and waves on the navigation light post based on historical sea breeze speeds, historical wave heights, historical wave periods, and historical wave directions; determining the erosion coefficient of the salt spray temperature difference on the navigation light post based on historical salt spray concentrations and historical day-night temperature differences; determining the environmental severity based on the combined force and erosion coefficient; and determining the number and location of the branch root piles based on the environmental severity, the light post height, and the main root pile diameter. The present invention can improve the stability and durability of the navigation light post in complex sea conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of breakwater structures, and in particular to a navigation light pile used in breakwater engineering and a construction method thereof. Background Art

[0002] Breakwater project navigational bollards are installed on breakwaters or in the surrounding waters as navigational aids. These typically feature a columnar structure topped with a light fixture. At night or in poor visibility, the light from these bollards guides ships, assists with port operations, and ensures vessel safety. Some bollards can also be used to mark specific areas, such as channel forks, shallow areas, and restricted navigation zones. This allows crew members to clearly understand the vessel's location and surrounding waters, enabling them to make informed navigation decisions.

[0003] Chinese patent application publication number CN113047331A discloses a combined breakwater head navigation light foundation structure, comprising a breakwater head and a navigation light foundation structure. The navigation light foundation structure comprises a precast concrete block at the bottom, a cast-in-place concrete block at the top, a reinforced steel mesh, a navigation light connector, and the navigation light. The precast concrete block at the bottom is mounted on the breakwater head, while the cast-in-place concrete block at the top is cast on top of the precast concrete block. Both the precast concrete block and the cast-in-place concrete block are provided with symmetrically arranged pre-holes, within which connecting steel sections and post-cast expansive concrete are installed. The lower portion of the navigation light connector is embedded in the cast-in-place concrete block, while the upper portion of the navigation light connector is exposed outside the cast-in-place concrete block. The reinforced steel mesh is arranged around the pre-holes and around the navigation light connector, and the navigation light is fixed to the connector. This precast and cast-in-place combined structure offers excellent durability.

[0004] This demonstrates that the aforementioned technical solution, employing a combination of prefabrication and cast-in-place construction, addresses the difficulties in constructing the navigation light pile foundation at the breakwater head, reducing both construction effort and costs. However, there are still challenges: the connection between the prefabricated and cast-in-place components requires precise construction planning and coordination. Furthermore, in harsh environments like the seaside, the connections between the prefabricated components can become weak links, impacting the service life of the substructure and reducing its durability. Summary of the Invention

[0005] To this end, the present invention provides a navigation light pile for breakwater projects and a construction method thereof, so as to overcome the problem that when constructing navigation light piles using a prefabricated + cast-in-place modular combination method in the prior art, the impact force of waves on the light piles in the horizontal direction is usually considered, and the influence of the vertical force of the waves on the light piles is less considered, resulting in the vertical loosening of the light piles, affecting the life and durability of the light pile structure.

[0006] To achieve the above-mentioned object, the present invention provides a navigation light post for breakwater engineering, comprising:

[0007] The foundation comprises a main root pile and a plurality of branch root piles, wherein the branch root piles are fixedly connected to the lower portion of the main root pile, and each branch root pile extends radially outward from the lower end of the main root pile;

[0008] a foundation cap, which is arranged on top of the main root pile;

[0009] The lamp post body is arranged above the foundation support and connected to the foundation support.

[0010] In another aspect, the present invention provides a method for constructing a navigation light pile for use in a breakwater project, comprising:

[0011] At the installation location of the navigation light pole, the historical sea breeze speed and historical sea breeze salt spray concentration are collected at a preset collection period, as well as the historical wave height, historical wave period, and historical day and night temperature difference;

[0012] determining the combined force of sea wind and waves on the navigation light pole according to the historical sea wind speed, the historical wave height, and the historical wave period;

[0013] Determining the erosion coefficient of the navigation light pile caused by the salt fog and the temperature difference according to the historical salt fog concentration and the historical day and night temperature difference;

[0014] determining the environmental severity of the navigation light pole according to the combined force and the erosion coefficient;

[0015] Determine the number and location of branches of the branch root pile according to the severity of the environment, the height of the lamp pile, and the diameter of the main root pile;

[0016] Determine the vertical size of the branch root pile of the navigation light pile according to the number of branches and the branch positions;

[0017] The vertical dimensions of the branch root piles are corrected based on the vertical wave force to obtain the construction dimensions of the branch root piles, and the navigation light piles are constructed.

[0018] Furthermore, the sea breeze force is determined based on the historical sea breeze speed, the windward area of the lamp pile and the resistance coefficient of the lamp pile to the airflow; the wave force is determined based on the historical wave height, the historical wave period, the diameter of the lamp pile and the projected area of the lamp pile in the vertical direction; and the combined force is determined based on the sea breeze force and the wave force.

[0019] Furthermore, the sea breeze dynamic pressure is determined based on the historical sea breeze speed and air density, the drag coefficient is determined based on the lamp pile diameter, historical sea breeze speed, air density and surface roughness of the lamp pile, and the sea breeze force is determined based on the sea breeze dynamic pressure, the windward area of the lamp pile and the drag coefficient.

[0020] Furthermore, under the historical wave cycle, the horizontal wave force is determined according to the diameter of the lamp pile and the historical wave height, the vertical wave force is determined according to the projected area, the acceleration of gravity and the historical wave height, and the wave action force is determined according to the horizontal wave force and the vertical wave force.

[0021] Furthermore, the sensitivity coefficient of salt fog concentration to temperature is determined based on the historical salt fog concentration and the historical day-night temperature difference, the erosion area of the lamp pile caused by sea breeze salt fog is determined based on the surface area of the lamp pile and the sensitivity coefficient, and the erosion coefficient is determined based on the erosion area and the surface area of the lamp pile.

[0022] Furthermore, the overforce ratio is determined according to the wave force and the preset force, the erosion impact ratio is determined according to the erosion coefficient and the preset coefficient, and the environmental severity is determined according to the overforce ratio and the erosion impact ratio.

[0023] Furthermore, a light pole foundation model is constructed according to the navigation light pole structure, and the force distribution of the light pole is determined based on the light pole foundation model, the environmental severity, the light pole height and the main root pile diameter. The number of branches of the branch root pile is determined based on the force distribution, the bearing capacity threshold of the branch root pile, the concrete strength and the steel bar strength.

[0024] Furthermore, root pile force data of the branch root piles are determined based on the lamp pile foundation model and the number of branches, and branch positions of the branch root piles are determined according to the root pile force data.

[0025] Furthermore, the axial force of the branch root pile is determined according to the number of branches and the branch positions, and the vertical dimension is determined based on the axial force and the compressive strength of the branch root pile.

[0026] Furthermore, the applied stress of the branch root pile under the vertical wave force is determined according to the vertical wave force, the number of branches and the branch position, and the vertical dimension is corrected based on the applied stress and a preset stress threshold.

[0027] Compared with the existing technology, the beneficial effect of the present invention is that the present invention divides the foundation part of the navigation light pile into a main root pile and a branch root pile through bionic design. The pressure on the navigation light pile is dispersed by the branch root piles, so that the force on the foundation part can be made more uniform. In addition, the foundation part cooperates with the foundation pedestal, the barbed anchor head and the breakwater head structure to greatly improve the stability of the navigation light pile in complex sea conditions, can withstand strong winds and waves and water flow impacts, ensure the long-term stable operation of the navigation light pile, and improve the stability and durability of the navigation light pile in complex sea conditions.

[0028] Furthermore, the present invention comprehensively considers the mechanical impact and chemical corrosion effects faced by navigation light poles in complex marine environments, and jointly determines the number of branches of the branch root piles of the navigation light poles in combination with factors such as sea breeze and waves and salt spray and day and night temperature differences, and corrects the branch size of the light poles through the vertical force, so that when the light pole foundation structure is subjected to wave impact, the wave force can be dispersed, the local impact on the foundation can be reduced, and the foundation instability caused by vertical foundation loss can be resisted, while the strength loss caused by salt spray erosion can be compensated, which can effectively slow down the structural damage rate of the navigation light poles and improve the stability and durability of the navigation light poles in complex sea conditions.

[0029] Furthermore, the present invention determines the combined force of sea breeze and waves on the navigation light pile by considering the specifications and dimensions of the light pile itself as well as multiple factors such as historical sea breeze speed, wave height, and period, providing an accurate mechanical basis for determining the number and position of branches of the branch root pile of the light pile, thereby improving the strength and stability of the constructed navigation light pile, enhancing the wind and wave resistance of the navigation light pile in harsh marine environments, ensuring the long-term stable operation of the light pile, and enhancing the overall safety and reliability of the breakwater project.

[0030] Furthermore, the present invention determines the over-force ratio based on the wave force and the preset force, and determines the erosion impact ratio based on the erosion coefficient and the preset coefficient, so as to comprehensively evaluate the environmental severity of the sea surface environment on the breakwater navigation light piles, quantify the adverse impact of the environment on the light piles, and provide a scientific basis for the subsequent design and construction of branch root piles of the light piles, helping to improve the stability and durability of the light piles in complex marine environments.

[0031] Furthermore, the present invention determines the number of branches of the branch root piles, reasonably determines the branch positions, optimizes the force uniformity of the branch root piles, avoids the problem of premature damage due to excessive force on some root piles, further extends the overall service life of the light pile while avoiding material waste, realizes efficient use of resources, and significantly improves the stability and reliability of the navigation light piles.

[0032] Furthermore, the present invention determines the axial force of the branch root pile 102 based on the number of branches and the branch position, and determines the size of the branch root pile in combination with the compressive strength, so that the length design of the branch root pile can match the actual load it bears. At the same time, the vertical size is corrected based on the vertical wave force to ensure the stability and anti-destruction ability of the navigation light pile under external force, making the design of the navigation light pile more scientific and reasonable, and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a structural diagram of a navigation light post according to an embodiment of the present invention;

[0034] Figure 2 This is a step diagram of a construction method of a navigation light post according to an embodiment of the present invention;

[0035] Figure 3 A diagram showing the steps for determining the erosion coefficient according to an embodiment of the present invention;

[0036] Figure 4 A diagram showing the steps for determining the number of branches according to an embodiment of the present invention;

[0037] In the figure: 101, main root pile; 102, branch root pile; 2, foundation pedestal; 3, main body of the light pile; 4, breakwater head. DETAILED DESCRIPTION

[0038] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0039] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0040] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0041] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0042] See also Figure 1 、 Figure 2 As shown, Figure 1 This is a structural diagram of a navigation light post according to an embodiment of the present invention; Figure 2 This is a step diagram of a construction method of a navigation light post according to an embodiment of the present invention;

[0043] Specifically, an embodiment of the present invention provides a construction method for a navigation light pile for a breakwater project, wherein the navigation light pile includes:

[0044] The foundation includes a main root pile 101 and a plurality of branch root piles 102. The main root pile 101 is used for vertical bearing. The branch root piles 102 are fixedly connected to the lower part of the main root pile 101. Each branch root pile 102 extends radially outward from the lower end of the main root pile 101.

[0045] A foundation cap 2 is provided on top of the main root pile 101 and has steel mesh arranged in a staggered manner inside to transfer the load of the foundation;

[0046] The lamp post body 3 is arranged above the foundation base 2 and connected to the foundation base 2 for installing a navigation light.

[0047] This embodiment also provides a construction method for the above-mentioned navigation light pile, including:

[0048] Step S1, collecting historical sea breeze speed, historical sea breeze salt spray concentration, historical wave height, historical wave period, and historical day and night temperature difference at the installation location of the navigation light pole according to a preset collection period;

[0049] Step S2, determining the combined force of sea breeze and waves on the navigation light pole according to the historical sea breeze speed, the historical wave height, and the historical wave period;

[0050] Step S3, determining the erosion coefficient of the navigation light pile caused by the salt fog and the temperature difference according to the historical salt fog concentration and the historical day and night temperature difference;

[0051] Step S4, determining the environmental severity of the navigation light pole according to the combined force and the erosion coefficient;

[0052] Step S5, determining the number and position of branches of the branch root pile 102 according to the environmental severity, the height of the lamp pile and the diameter of the main root pile 101;

[0053] Step S6, determining the vertical size of the branch root pile of the navigation light pile according to the number of branches and the branch positions;

[0054] The vertical dimensions of the branch root piles are corrected based on the vertical wave force to obtain the construction dimensions of the branch root piles, and the navigation light piles are constructed.

[0055] As you can understand, the main root pile 101 is the core vertical bearing column, providing vertical support for the navigation light pole and ensuring its stability under external forces. The branch root piles 102 are fixedly connected to the main root pile 101 and extend radially. This biomimetic design can expand the bearing area of the foundation, distribute the load more evenly, and improve the foundation's stability.

[0056] It is understood that foundation cap 2 further diffuses and transfers the load borne by the foundation. Furthermore, the internal steel mesh enhances its crack resistance and load-bearing capacity, improving its integrity and durability. Light post body 3 supports navigational equipment such as navigation lights. Furthermore, light post body 3 protects the electrical equipment and wiring within it from erosion and damage from external environmental factors.

[0057] It is understandable that because different installation locations correspond to different topographic and climatic zones, different sea breeze speeds, salt spray concentrations, and different day and night temperature differences, there are significant differences in environmental conditions. Considering the installation location of the navigation light pole can provide a basis for the structural design of the navigation light pole and the evaluation of its wind and erosion resistance.

[0058] It is understandable that wave force, as a mechanical shock, will generate horizontal and vertical loads on the lamp pile foundation, which may cause shaking or even displacement. The salt mist carried by the sea breeze contains a large amount of salt. These salts will adhere to the surface of the lamp pile in a humid environment, forming an electrolyte solution, which will gradually erode the surface of the lamp pile. Long-term accumulation will lead to a decrease in structural strength. In addition, the temperature difference between day and night will affect the speed of salt mist erosion. During the temperature change process, the distribution and concentration of the salt mist solution on the surface of the lamp pile will also change, exacerbating the erosion. Comprehensively determining the severity of the environment based on factors such as sea breeze and waves and the temperature difference between day and night in salt mist, and then determining the number and position of the branch root piles 102, can ensure that the branch root piles 102 can still ensure the stability of the foundation when resisting wave forces and being eroded due to material strength.

[0059] In a specific embodiment, the number of the branch root piles 102 needs to be determined according to the installation position of the branch root piles 102, and the steel mesh in the foundation cap 2 is arranged in a crisscross pattern.

[0060] In a specific embodiment, the preset collection period has a value range of 1 to 2 years, preferably, the preset collection period has a value of 1 year. The height of the lamp post has a value range of 5 to 15 meters, preferably, the height of the lamp post has a value of 10 meters. The diameter of the main root pile 101 has a value range of 0.8 to 1.5 meters, preferably, the diameter of the main root pile 101 has a value of 1.2 meters. In implementation, the value range and preferred value of the preset collection period, the height of the lamp post, and the diameter of the main root pile 101 can be determined according to the specific installation location of the lamp post and the surrounding marine environmental conditions. No specific limitation is made here and no further description is given.

[0061] The present invention divides the base of the navigation light pile into a main root pile 101 and a branch root pile 102 through bionic design. The branch root pile 102 disperses the pressure on the navigation light pile, so that the force on the base part can be more uniform.

[0062] The present invention comprehensively considers the mechanical impact and chemical corrosion that navigation light piles face in complex marine environments, and combines factors such as sea breeze and waves, salt spray and day and night temperature differences to determine the number of branches of the branch root piles 102 of the navigation light pile. When the light pile foundation structure is subjected to wave impact, the wave force can be dispersed to reduce local impact on the foundation, while compensating for the strength loss caused by salt spray erosion. This can effectively slow down the structural damage rate of the navigation light pile and improve the stability and durability of the navigation light pile in complex sea conditions.

[0063] Specifically, a barbed anchor head (not shown in the figure) is provided at the end of the branch root pile 102 to enhance the mechanical bite force with the concrete.

[0064] As can be understood, the barbed anchor head at the end of the branch root pile 102 enhances the mechanical engagement with the concrete, preventing displacement of the foundation under external forces. In the face of strong waves and winds, it can better transfer force to the surrounding concrete and, in turn, to the foundation. The foundation, in conjunction with the foundation cap 2, the barbed anchor head, and the breakwater head 4, significantly enhances the stability of the navigation light pole in complex sea conditions, protecting it from strong waves and currents and ensuring its long-term stable operation.

[0065] Specifically, in step S2, the sea breeze force is determined based on the historical sea breeze speed, the windward area of the lamp pile and the resistance coefficient of the lamp pile to the airflow; the wave force is determined based on the historical wave height, the historical wave period, the diameter of the lamp pile and the projection area of the lamp pile in the vertical direction; and the combined force is determined based on the sea breeze force and the wave force.

[0066] Understandably, in actual marine environments, light poles are subject to the combined effects of both wind and waves, which interact to determine the loads they bear. Historical wind speeds reflect the magnitude of the wind's dynamics, the windward area of the light pole determines the extent of the wind's influence, and the airflow resistance coefficient of the light pole reflects the wind's resistance to the wind from its structure. Combining these three factors can determine the force exerted by the wind on the light pole. Historical wave heights reflect the size of the waves, historical wave periods influence the persistence of the wave action, and the diameter of the light pole and its vertical projection define the specific range of wave action on the light pole. These factors can be used to determine the wave force, facilitating subsequent accurate assessments of the stress on the light pole in complex marine environments.

[0067] In a specific embodiment, the windward area of the lamp post = lamp post height × lamp post diameter, and the projection area of the lamp post in the vertical direction = , the joint force = sea breeze force + wave force.

[0068] The present invention determines the combined force of sea breeze and waves on the navigation light pile by considering the specifications and dimensions of the light pile itself as well as multiple factors such as historical sea breeze speed, wave height, period, acceleration, etc., and provides an accurate mechanical basis for determining the number and position of branches of the branch root pile 102 of the light pile, thereby improving the strength and stability of the constructed navigation light pile, enhancing the wind and wave resistance of the navigation light pile in harsh marine environments, ensuring the long-term stable operation of the light pile, and enhancing the overall safety and reliability of the breakwater project.

[0069] Specifically, in step S2, the sea breeze dynamic pressure is determined based on the historical sea breeze speed and air density, the drag coefficient is determined based on the lamp pile diameter, historical sea breeze speed, air density and surface roughness of the lamp pile, and the sea breeze force is determined based on the sea breeze dynamic pressure, the windward area of the lamp pile and the drag coefficient.

[0070] In a specific embodiment, the sea wind dynamic pressure can be calculated according to the Bernoulli equation, where the sea wind dynamic pressure = When determining the drag coefficient, the Reynolds number is considered. The Reynolds number determines whether the sea breeze around the light pole is laminar flow, transitional flow or other flow state. Different flow states correspond to different resistances. Reynolds number = The air density is the air density corresponding to the maximum historical sea breeze speed. The empirical formula for determining the drag coefficient is: Drag coefficient = Considering surface roughness, the drag coefficient = roughness drag influence coefficient × surface roughness, and the sea breeze force = sea breeze dynamic pressure × windward area of the lighthouse × drag coefficient. The roughness drag influence coefficient can be determined based on several tests by determining the linear relationship between the drag coefficient and surface roughness at different sea breeze speeds. Preferably, the linear relationship is y = kx, where k is the roughness drag influence coefficient, y is the drag coefficient, and x is the surface roughness.

[0071] Specifically, in step S2, based on the historical wave period, the horizontal wave force is determined according to the lamp pile diameter and the historical wave height, the vertical wave force is determined according to the projected area, the gravitational acceleration and the historical wave height, and the wave action force is determined according to the horizontal wave force and the vertical wave force.

[0072] It is understandable that the wave period determines the time interval between wave impacts, and waves of different periods have different effects on the light poles. Long-period waves may produce a long-term, relatively stable force on the light poles, while short-period waves may cause frequent impacts.

[0073] It's understandable that the diameter of a light pole is closely related to horizontal wave forces. The larger the diameter, the greater the area the pole blocks waves, and the greater the horizontal force it experiences. Historical wave height is a key indicator of wave energy. Higher wave heights, greater wave energy, and greater horizontal impact forces on the light pole. Therefore, the horizontal wave force is determined by combining these three factors.

[0074] It is understandable that the projected area of the navigation light pole determines the range of interaction between the light pole and the waves in the vertical direction, and the projected area is positively correlated with the wave force in the vertical direction. In addition, the historical wave height also affects the amplitude and speed of water particle movement in the vertical direction. The greater the wave height, the greater the speed and impact of water particle movement in the vertical direction. Therefore, the vertical wave force is determined by combining the above three factors, and the horizontal wave force is combined to determine the force of the wave on the light pole.

[0075] In a specific embodiment, the horizontal wave force = 0.5 × seawater density × resistance coefficient × lamp pile diameter × The horizontal velocity of the wave water particles is determined by substituting the wave height and wave period according to the linear wave theory. The vertical wave force = seawater density × gravitational acceleration × projected area × ;

[0076] Said wave force = .

[0077] See also Figure 3 As shown, Figure 3This is a diagram of the steps for determining the erosion coefficient according to an embodiment of the present invention. Specifically, in step S3, the following steps are included:

[0078] Step S31, determining a sensitivity coefficient of salt spray concentration to temperature based on the historical salt spray concentration and the historical day and night temperature difference;

[0079] Step S32, determining the erosion area of the lamp pile caused by sea breeze and salt mist according to the surface area of the lamp pile and the sensitivity coefficient;

[0080] Step S33: determining the erosion coefficient according to the erosion area and the surface area of the lamp post.

[0081] It's understandable that the temperature difference between day and night affects the formation and concentration of salt fog. During high daytime temperatures, seawater evaporates rapidly, increasing water vapor on the sea surface and making the air more tolerant to water vapor. During low nighttime temperatures, the temperature drops rapidly, causing the air to become supersaturated with water vapor, which easily condenses into small droplets. These droplets then absorb surrounding salt particles, forming salt fog, which results in relatively high concentrations. Therefore, when the temperature difference between day and night is large, salt fog is more likely to form, and its concentration is more likely to rise to a certain level.

[0082] In a specific embodiment, the sensitivity coefficient = The time point at which the temperature is determined by the historical daytime and nighttime temperature differences corresponds to the time point at which the salt spray concentration is determined by the historical salt spray concentration differences. Erosion area = lamp post surface area × sensitivity coefficient, where the erosion coefficient = erosion area / lamp post surface area.

[0083] Specifically, in step S4, the overforce ratio is determined according to the wave force and the preset force, the erosion impact ratio is determined according to the erosion coefficient and the preset coefficient, and the environmental severity is determined according to the overforce ratio and the erosion impact ratio.

[0084] It can be understood that the over-force ratio reflects the extent to which the wave force exceeds the force that the navigation light pole can withstand, and can characterize the threat level of wave force to the navigation light pole; the erosion coefficient can measure the severity of the erosion damage caused by salt spray temperature difference to the navigation light pole; the mechanical impact of wave force and the chemical damage caused by salt spray temperature difference erosion will interactively affect the stability and durability of the light pole, so the environmental severity is determined by the above two factors.

[0085] In a specific embodiment, the overload ratio = wave force / preset force; erosion impact ratio = erosion coefficient / preset coefficient; the preset force range is Preferably, the preset force is ; The value range of the preset coefficient is 0.15 to 0.3. Preferably, the value of the preset coefficient is 0.2; Environmental severity = force weight × overforce ratio + erosion weight × erosion impact ratio, wherein the sum of the force weight and the erosion weight is 1. Since the wave impact is more intuitive and powerful, the force weight is greater than the erosion weight. The value range of the force weight is 0.6 to 0.8. Preferably, the value of the force weight is 0.7; The value range of the erosion weight is 0.2 to 0.4. Preferably, the value of the erosion weight is 0.3. In implementation, the value ranges and preferred values of the preset force, preset coefficient, force weight and erosion weight can be determined according to actual conditions. No specific limitation is made here and no further description is given.

[0086] The present invention determines the over-force ratio based on the wave force and the preset force, and determines the erosion impact ratio based on the erosion coefficient and the preset coefficient, thereby comprehensively evaluating the environmental severity of the sea surface environment on the breakwater navigation light pile, quantifying the adverse impact of the environment on the light pile, and providing a scientific basis for the subsequent design and construction of the branch root pile 102 of the light pile, thereby helping to improve the stability and durability of the light pile in complex marine environments.

[0087] See also Figure 4 As shown, Figure 4 FIG. 1 is a diagram of steps for determining the number of branches according to an embodiment of the present invention; specifically, step S5 includes:

[0088] Step S51, constructing a light post foundation model according to the navigation light post structure;

[0089] Step S52, determining the force distribution of the lamp post based on the lamp post foundation model, the environmental severity, the lamp post height, and the main root pile 101 diameter;

[0090] Step S53 : determining the number of branches of the branch root pile 102 based on the force distribution and the bearing capacity threshold of the branch root pile 102 .

[0091] Understandably, different parts of a navigation light pole experience varying loads, requiring branch piles 102 to provide corresponding bearing capacity to ensure stability. Therefore, the load conditions for the pole are determined based on the pole foundation model, environmental severity, pole height, and the diameter of the main pile 101. Furthermore, since concrete and steel strength directly impact the bearing capacity of branch piles 102, these factors are combined to determine the number of branch piles 102 to distribute the load and protect the pole foundation from damage.

[0092] In a specific embodiment, a light pile foundation model can be constructed based on the basic shape of the navigation light pile, the dimensions of each part, and the internal structure. Finite element analysis software such as ANSYS and ABAQUS can be used to construct a model that can reflect the mechanical characteristics of the light pile foundation. The sea breeze dynamic pressure, wave force, and environmental severity can be applied to the model. The force distribution of different parts of the light pile can be determined through finite element analysis software, such as the force value at the top of the light pile, the force value at the bottom of the light pile, and the bending moment at different heights of the light pile body 3. The number of branches of the branch root pile 102 × the bearing capacity threshold ≥ the safety factor × the force value at the bottom of the light pile, where the bearing capacity threshold of the branch root pile 102 is the maximum load that a single branch root pile 102 can withstand, and the value range of the bearing capacity threshold is Preferably, the carrying capacity threshold is The safety factor has a value range of 1.2 to 1.5. Preferably, the safety factor has a value of 1.3. In practice, the safety factor can be determined based on actual conditions, and the bearing capacity threshold can be determined based on the stress conditions of a single branch root pile 102, as well as the concrete strength and steel bar strength. This is not specifically limited here and will not be elaborated on.

[0093] Specifically, in step S5 , the root pile force data of the branch root pile 102 is determined based on the lamp pile foundation model and the number of branches, and the branch position of the branch root pile 102 is determined according to the root pile force data.

[0094] In a specific embodiment, based on the above-mentioned finite element model and the determined number of branches of the branch root pile 102, the force data of the branch root pile 102 can be determined. Through the above-mentioned model and the root pile force data, the force transmission path in the entire navigation light pile can be simulated to determine the branch position and make the force uniform.

[0095] The present invention determines the number of branches of the branch root pile 102, reasonably determines the branch position, and optimizes the force uniformity of the branch root pile 102, thereby avoiding premature damage due to excessive force on some root piles, further extending the overall service life of the light pile while avoiding material waste, achieving efficient resource utilization, and significantly improving the stability and reliability of the navigation light pile.

[0096] Specifically, in step S6, the axial force of the branch root pile 102 is determined based on the number of branches and the branch position, the vertical dimension is determined based on the axial force and the compressive strength of the branch root pile 102, the applied stress of the branch root pile under the vertical wave force is determined based on the vertical wave force, the number of branches and the branch position, and the vertical dimension is corrected based on the applied stress and a preset stress threshold.

[0097] It is understood that axial force refers to the force along the axis of the branch root pile 102, applied stress refers to the stress generated by the branch root pile 102 under the vertical wave force, and compressive strength refers to the mechanical property of the branch root pile 102 material itself. The vertical dimension refers to the length of the branch root pile 102. By establishing a finite element analysis model, the axial force of the branch root pile 102 can be determined, and the vertical dimension can be determined accordingly, thereby improving the stability of the constructed navigation light pile. The vertical dimension can also be corrected based on the vertical wave force to ensure the axial force and accurately determine the material usage.

[0098] In a specific embodiment, the axial force of a single branch root pile 102 can be determined based on the branch position, the number of branches, and the finite element model. The cross-sectional area required for the branch root pile 102 = axial force / compressive strength. Preferably, the branch root pile 102 is a cylinder, and the vertical dimension can be determined based on the finite element analysis model and the cross-sectional area of the branch root pile 102. The vertical wave force is loaded into the finite element model for stress analysis to determine the stress of a single branch root pile 102 under the vertical wave force. If the stress is greater than a preset stress threshold, the vertical dimension is corrected. Vertical dimension correction amount = The compressive strength ranges from 215 MPa to 300 MPa, preferably 250 MPa; the preset stress threshold ranges from 207 MPa to 280 MPa. In practice, the ranges and preferred values of the compressive strength and the preset stress threshold can be determined based on actual conditions and are not specifically limited here or elaborated upon.

[0099] The present invention determines the axial force of the branch root pile 102 based on the number of branches and the branch position, and determines the vertical size of the branch root pile 102 in combination with the compressive strength, so that the length design of the branch root pile 102 can match the actual load it bears. At the same time, the vertical size is corrected based on the vertical wave force to ensure the stability and anti-destruction ability of the navigation light pile under external force, making the design of the navigation light pile more scientific and reasonable and extending its service life.

[0100] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A construction method for a navigation light pile for a breakwater project, characterized in that: Navigation light posts include: The foundation comprises a main root pile and a plurality of branch root piles, wherein the branch root piles are fixedly connected to the lower portion of the main root pile, and each branch root pile extends radially outward from the lower end of the main root pile; a foundation cap, which is arranged on top of the main root pile; A lamp post body, which is arranged above the foundation support and connected to the foundation support; The construction method of the navigation light pile includes: At the installation location of the navigation light pole, the historical sea breeze speed and historical sea breeze salt spray concentration are collected at a preset collection period, as well as the historical wave height, historical wave period, and historical day and night temperature difference; determining the combined force of sea wind and waves on the navigation light pole according to the historical sea wind speed, the historical wave height, and the historical wave period; Determining the erosion coefficient of the navigation light pile caused by the salt fog and the temperature difference according to the historical salt fog concentration and the historical day and night temperature difference; determining the environmental severity of the navigation light pole according to the combined force and the erosion coefficient; Constructing a light pole foundation model according to the navigation light pole structure, and determining the force distribution of the light pole based on the light pole foundation model, the environmental severity, the light pole height, and the main root pole diameter; and determining the number of branches of the branch root pole based on the force distribution, the bearing capacity threshold of the branch root pole, the concrete strength, and the steel bar strength; Determining root pile force data of the branch root piles based on the lamp pile foundation model and the number of branches, and determining branch positions of the branch root piles according to the root pile force data; Determine the vertical size of the branch root pile of the navigation light pile according to the number of branches and the branch positions; The vertical dimension of the branch root pile is corrected based on the vertical wave force to obtain the construction dimension of the branch root pile, and the navigation light pile is constructed, wherein the vertical dimension is the length of each branch root pile.

2. The construction method of the navigation light pile for breakwater engineering according to claim 1, characterized in that: The sea breeze force is determined based on the historical sea breeze speed, the windward area of the lamp pile and the resistance coefficient of the lamp pile to the airflow; the wave force is determined based on the historical wave height, the historical wave period, the diameter of the lamp pile and the projected area of the lamp pile in the vertical direction; and the combined force is determined based on the sea breeze force and the wave force.

3. The construction method of the navigation light pile for breakwater engineering according to claim 2, characterized in that: The sea breeze dynamic pressure is determined based on the historical sea breeze speed and air density, the drag coefficient is determined based on the lamp pile diameter, historical sea breeze speed, air density and surface roughness of the lamp pile, and the sea breeze force is determined based on the sea breeze dynamic pressure, the windward area of the lamp pile and the drag coefficient.

4. The construction method of the navigation light pile for breakwater engineering according to claim 2, characterized in that: Under the historical wave cycle, based on the historical wave cycle, the horizontal wave force is determined according to the diameter of the lamp pile and the historical wave height, the vertical wave force is determined according to the projected area, the acceleration of gravity and the historical wave height, and the wave action force is determined according to the horizontal wave force and the vertical wave force.

5. The construction method of the navigation light pile for breakwater engineering according to claim 1, characterized in that: The sensitivity coefficient of salt fog concentration to temperature is determined based on the historical salt fog concentration and the historical day-night temperature difference, the erosion area of the lamp pile caused by sea breeze salt fog is determined based on the surface area of the lamp pile and the sensitivity coefficient, and the erosion coefficient is determined based on the erosion area and the surface area of the lamp pile.

6. The construction method of the navigation light pile for breakwater engineering according to claim 5, characterized in that: An overload ratio is determined according to the wave force and the preset force, an erosion impact ratio is determined according to the erosion coefficient and the preset coefficient, and the environmental severity is determined according to the overload ratio and the erosion impact ratio.

7. The construction method of the navigation light pile for breakwater engineering according to claim 6, characterized in that: An axial force of the branch root pile is determined according to the number of branches and the branch positions, and a vertical dimension is determined based on the axial force and the compressive strength of the branch root pile.

8. The construction method of the navigation light pile for breakwater engineering according to claim 7, characterized in that: The applied stress of the branch root pile under the vertical wave force is determined according to the vertical wave force, the number of branches and the branch position, and the vertical dimension is corrected based on the applied stress and a preset stress threshold.

Images