Navigation lamp pile for breakwater engineering and construction method thereof

Abstract

The invention relates to the technical field of breakwater structures, in particular to a navigation lamp pile for breakwater engineering and a construction method thereof.The navigation lamp pile comprises a foundation part composed of a main root pile and a plurality of branch root piles, the main root pile is a core vertical bearing column, the branch root piles extend outwards in a radial mode from the main root pile, and barb type anchor heads are arranged at the tail ends of the branch root piles; the mechanical occlusal force with concrete is enhanced; a foundation platform; a lamp pile main body; the construction method comprises the steps that the acting force of sea wind waves on the navigation lamp pile is determined according to the historical sea wind speed, the historical wave height, the historical wave period and the historical wave direction; determining an erosion coefficient of the salt mist temperature difference to the navigation lamp pile according to the historical salt mist concentration and the historical day-night temperature difference; determining environmental severity according to the common acting force and the erosion coefficient; and the branch number and the branch positions of the branch root piles are determined according to the environmental severity, the lamp pile height and the diameter of the main root pile. The stability and durability of the navigation lamp pile under complex sea conditions can be improved.

Description

Technical Field

[0001] The 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] The navigation light poles of the breakwater project are a kind of navigation aids installed on the breakwater or in the sea area near it. They are usually columnar structures with light-emitting devices installed on the top. At night or in poor visibility, the light emitted by the navigation light poles can guide the navigation of ships, assist port operations, and ensure the safety of ships. Some navigation light poles can also be used to mark specific areas, such as channel forks, shoal areas, and restricted navigation areas, so that the crew can clearly understand the location of the ship and the surrounding waters, so as to make correct navigation decisions.

[0003] Chinese patent application publication number: CN113047331A, discloses a combined breakwater head navigation light pile foundation structure, including breakwater head and navigation light pile foundation structure, the navigation light pile foundation structure includes bottom precast concrete block, top cast-in-place concrete block, reinforced steel mesh, navigation light pile connector and navigation light pile, the bottom precast concrete block is arranged on the breakwater head, the top cast-in-place concrete block is cast on the bottom precast concrete block, the bottom precast concrete block and the top cast-in-place concrete block are provided with symmetrically arranged reserved holes, the reserved holes are provided with connecting steel and post-cast expansion concrete, the lower part of the navigation light pile connector is pre-buried in the top cast-in-place concrete block, the upper part of the navigation light pile connector is exposed to the top cast-in-place concrete block, the reinforced steel mesh is arranged around the reserved hole and around the navigation light pile connector, and the navigation light pile is fixed on the navigation light pile connector. The precast and cast-in-place combined structure has good durability.

[0004] It can be seen that the above technical solution adopts a prefabricated and cast-in-place composite structure to solve the difficult construction problem of the navigation light pile foundation at the head of the breakwater, reduce the construction difficulty and save construction costs. However, there are still the following problems: the connection between the prefabricated parts and the cast-in-place parts requires precise construction arrangements and coordination. At the same time, in harsh environments such as the seaside, the connection between the prefabricated parts may become a weak link, which in turn affects the service life of the bottom structure and reduces the durability of the structure. Summary of the invention

[0005] To this end, the present invention provides a navigation light pile for breakwater engineering 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, while 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 object, on the one hand, the present invention provides a navigation light pole for breakwater engineering, comprising: A foundation part, comprising a main root pile and a plurality of branch root piles, wherein the branch root piles are fixedly connected to the lower part of the main root pile, and each branch root pile extends radially outward with the lower end of the main root pile as the center; A foundation cap, which is arranged on the top of the main root pile; The lamp post body is arranged above the basic support and connected to the basic support.

[0007] In another aspect, the present invention provides a construction method for a navigation light pile used in a breakwater project, comprising: At the installation location of the navigation light pole, the historical sea wind speed and the historical salt spray concentration of the sea wind are collected at a preset collection period, and the historical wave height, historical wave period and historical day and night temperature difference are collected; Determine 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; Determine 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 environment to the navigation light pole according to the combined force and the erosion coefficient; 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; 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.

[0008] Furthermore, the sea breeze force is determined according to 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 according to 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 according to the sea breeze force and the wave force.

[0009] Furthermore, the sea breeze dynamic pressure is determined according to the historical sea breeze speed and air density, the drag coefficient is determined according to the lamp pile diameter, historical sea breeze speed, air density and surface roughness of the lamp pile, and the sea breeze force is determined according to the sea breeze dynamic pressure, the windward area of ​​the lamp pile and the drag coefficient.

[0010] 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 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.

[0011] Furthermore, the sensitivity coefficient of salt fog concentration to temperature is determined according to the historical salt fog concentration and the historical day-night temperature difference, the erosion area of ​​the lamp pile by sea breeze salt fog is determined according to the surface area of ​​the lamp pile and the sensitivity coefficient, and the erosion coefficient is determined according to the erosion area and the surface area of ​​the lamp pile.

[0012] 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.

[0013] 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, and 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.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] Compared with the prior art, the beneficial effect of the present invention lies in 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, and disperses the pressure on the navigation light pile through the branch root piles, so that the force on the foundation part can be 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.

[0018] Furthermore, the present invention comprehensively considers the mechanical impact and chemical corrosion effects faced by navigation light piles in complex marine environments, and jointly determines the number of branches of the branch root piles of the navigation light piles in combination with factors such as sea breeze and waves and salt spray day and night temperature differences, and corrects the branch size of the light piles through the vertical force, so that when the light pile 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 piles and improve the stability and durability of the navigation light piles in complex sea conditions.

[0019] Furthermore, the present invention determines the combined force of sea breeze and waves on the navigation light pile by taking into account the specifications and dimensions of the light pile itself as well as multiple factors such as historical sea breeze speed, wave height, and period, thereby providing an accurate mechanical basis for determining the number and position of branches of the branch root pile of the light pile, thereby making the strength and stability of the constructed navigation light pile better, improving 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.

[0020] Furthermore, the present invention determines the over-force ratio according to the wave force and the preset force, and determines the erosion impact ratio according to the erosion coefficient and the preset coefficient, so as to comprehensively evaluate the environmental severity of the sea surface environment to 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.

[0021] 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 premature damage due to excessive force on some root piles, further extends the overall service life of the light pile while avoiding material waste, achieves efficient use of resources, and significantly improves the stability and reliability of the navigation light piles.

[0022] 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 dimension is corrected based on the vertical wave force to ensure the stability and anti-destruction ability of the navigation light pile under the action of external force, making the design of the navigation light pile more scientific and reasonable, and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of a navigation light pole 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; Figure 3A diagram showing the steps for determining the erosion coefficient according to an embodiment of the present invention; Figure 4 A diagram of steps for determining the number of branches according to an embodiment of the present invention; In the figure: 101, main root pile; 102, branch root pile; 2, foundation pedestal; 3, main body of lamp pile; 4, breakwater head. DETAILED DESCRIPTION

[0024] 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 only used to explain the present invention and are not used to limit the present invention.

[0025] 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 protection scope of the present invention.

[0026] 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 drawings. This is merely 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.

[0027] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] See also Figure 1 , Figure 2 As shown, Figure 1 This is a schematic diagram of the structure of a navigation light pole 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; Specifically, an embodiment of the present invention provides a construction method of a navigation light pile for a breakwater project, wherein the navigation light pile comprises: The foundation part 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 with the lower end of the main root pile 101 as the center. A foundation cap 2, which is arranged on the top of the main root pile 101 and has steel meshes arranged in a staggered manner inside to transfer the load of the foundation; The lamp post body 3 is arranged above the base support 2 and connected to the base support 2 for installing a navigation light.

[0029] This embodiment also provides a construction method for the above-mentioned navigation light pile, including: 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 a preset collection period at the installation location of the navigation light pole; Step S2, determining the combined force of sea wind and waves on the navigation light pile according to the historical sea wind speed, the historical wave height and the historical wave period; 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; Step S4, determining the environmental severity of the navigation light pole according to the combined force and the erosion coefficient; 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; 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; 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.

[0030] It can be understood that the main root pile 101 is a core vertical bearing column, which provides vertical support for the navigation light pile and ensures the stability of the navigation light pile under external force. The branch root piles 102 are fixedly connected to the main root pile 101 and extend radially. This bionic design can expand the bearing area of ​​the foundation, distribute the load more evenly in the foundation, and improve the stability of the foundation.

[0031] It is understandable that the foundation pedestal 2 can further diffuse and transfer the load borne by the foundation, and the steel mesh inside it can enhance the crack resistance and bearing capacity of the foundation pedestal 2, and improve the integrity and durability of the foundation pedestal 2. The lamp post body 3 is used to support navigation lights and other equipment to play a navigation role. In addition, the lamp post body 3 can also protect the electrical equipment and lines inside it to prevent erosion and damage by external environmental factors.

[0032] It is understandable that because different installation locations correspond to different topographic and climate 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.

[0033] It is understandable that the wave force, as a mechanical shock, will produce 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 to form 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, aggravating 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.

[0034] In a specific embodiment, the number of the branch root piles 102 needs to be determined according to the installation positions of the branch root piles 102, and the steel meshes in the foundation cap 2 are arranged in a criss-cross pattern.

[0035] In a specific embodiment, the preset collection period ranges from 1 year to 2 years, and preferably, the preset collection period is 1 year. The height of the light pile ranges from 5 to 15 meters, and preferably, the height of the light pile is 10 meters. The diameter of the main root pile 101 ranges from 0.8 to 1.5 meters, and preferably, the diameter of the main root pile 101 is 1.2 meters. In implementation, the preset collection period, the height of the light pile, and the range and preferred value of the main root pile 101 diameter can be determined according to the specific installation location of the light pile and the surrounding marine environmental conditions, and are not specifically limited here and will not be repeated.

[0036] The present invention divides the base part of the navigation light pile into a main root pile 101 and a branch root pile 102 through bionic design, and disperses the pressure on the navigation light pile through the branch root pile 102, so that the force on the base part can be more uniform.

[0037] The present invention comprehensively considers the mechanical impact and chemical corrosion that the navigation light pile faces in a complex marine environment, and jointly determines the number of branches of the branch root pile 102 of the navigation light pile in combination with factors such as sea breeze and waves and salt spray day and night temperature difference, so that when the light pile foundation structure is subjected to wave impact, the wave force can be dispersed to reduce the local impact on the foundation, while compensating for the strength loss caused by salt spray erosion, which 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.

[0038] 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 concrete.

[0039] It is understandable that the barbed anchor head at the end of the branch root pile 102 can enhance the mechanical bite force with the concrete, prevent the foundation from being displaced when subjected to external forces, and better transfer the force to the surrounding concrete and then to the foundation when facing strong waves and strong winds. The foundation part cooperates with the foundation pedestal 2, the barbed anchor head and the breakwater head 4 to greatly improve the stability of the navigation light pile in complex sea conditions, and can withstand strong winds, waves and water currents, ensuring the long-term stable operation of the navigation light pile.

[0040] Specifically, in step S2, the sea breeze force is determined according to 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 according to 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 according to the sea breeze force and the wave force.

[0041] It is understandable that in the actual marine environment, the light poles are affected by both sea breeze and waves, which influence each other and jointly determine the load borne by the light poles. The historical sea breeze speed reflects the power of the sea breeze, the windward area of ​​the light pole determines the scope of the sea breeze, and the resistance coefficient of the light pole to the airflow reflects the resistance characteristics of the light pole's own structure to the sea breeze. By combining these three factors, the force exerted by the sea breeze on the light pole can be determined. The historical wave height reflects the size of the wave, the historical wave cycle affects the continuity of the wave action, and the diameter of the light pole and the projection area of ​​the light pole in the vertical direction clarify the specific range of the wave action on the light pole. These factors can be used to determine the wave force, which is convenient for the subsequent accurate evaluation of the stress state of the light pole in a complex marine environment.

[0042] 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 combined force = sea breeze force + wave force.

[0043] 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 making the strength and stability of the constructed navigation light pile better, improving 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 improving the overall safety and reliability of the breakwater project.

[0044] Specifically, in step S2, the sea breeze dynamic pressure is determined according to the historical sea breeze speed and air density, the drag coefficient is determined according to the lamp pile diameter, historical sea breeze speed, air density and surface roughness of the lamp pile, and the sea breeze force is determined according to the sea breeze dynamic pressure, the windward area of ​​the lamp pile and the drag coefficient.

[0045] 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 is laminar flow, transitional flow or other flow state when it flows around the light pole. Different flow states correspond to different resistances. Reynolds number = , the air density is the air density corresponding to the maximum historical sea wind speed. The empirical formula for determining the drag coefficient is: Drag coefficient = , considering the surface roughness, the drag coefficient = roughness drag influence coefficient × drag coefficient, and the sea breeze force = sea breeze dynamic pressure × windward area of ​​the lamp pile × drag coefficient. Among them, the roughness drag influence coefficient can be determined based on several tests, by determining the linear relationship between the drag coefficient and the surface roughness under 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.

[0046] Specifically, in step S2, based on the historical wave cycle, 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 projection area, gravity acceleration and the historical wave height, and the wave action force is determined according to the horizontal wave force and the vertical wave force.

[0047] It is understandable that the wave period determines the time interval of wave action, and waves of different periods have different effects on the light poles. Long-period waves may produce a long-term and relatively stable force on the light poles, while short-period waves may bring frequent impacts.

[0048] It is understandable that the diameter of the light pole is closely related to the horizontal wave force. The larger the diameter, the larger the area of ​​the light pole that blocks the waves, and the greater the horizontal force it receives. The historical wave height is an important manifestation of wave energy. The higher the wave height, the greater the energy contained in the wave, and the greater the impact force on the light pole in the horizontal direction. Therefore, the horizontal wave force is determined by combining the above three factors.

[0049] It is understandable that the projection area of ​​the navigation light pole determines the range of interaction between the light pole and the waves in the vertical direction, the projection area is positively correlated with the wave force in the vertical direction, and 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 movement speed and impact force of the water particles in the vertical direction. Therefore, the vertical wave force is determined by combining the above three factors, and the wave force in the horizontal direction is combined to determine the force of the wave on the light pole.

[0050] 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 into the linear wave theory. The vertical wave force = seawater density × gravitational acceleration × projected area × ; The wave force = .

[0051] See also Figure 3 As shown, Figure 3 The following is a step diagram of determining the erosion coefficient according to an embodiment of the present invention. Specifically, in step S3, it includes: Step S31, determining the sensitivity coefficient of salt spray concentration to temperature according to the historical salt spray concentration and the historical day and night temperature difference; Step S32, determining the erosion area of ​​the lamp pile by the sea breeze and salt fog according to the surface area of ​​the lamp pile and the sensitivity coefficient; Step S33, determining the erosion coefficient according to the erosion area and the surface area of ​​the lamp post.

[0052] It is understandable that the temperature difference between day and night will affect the formation and concentration of salt fog. During the daytime when the temperature is high, seawater will evaporate quickly, the water vapor on the sea surface will increase, and the air has a stronger ability to accommodate water vapor. During the nighttime when the temperature is low, the temperature drops rapidly, the water vapor in the air will reach an oversaturated state, and it is easy to condense into small water droplets. The small water droplets will absorb the surrounding salt particles to form salt fog, and the concentration of salt fog is relatively high. Therefore, when the temperature difference between day and night is large, salt fog is more likely to be generated, and the concentration of salt fog is more likely to rise to a certain extent.

[0053] In a specific embodiment, the sensitivity coefficient = , where the time point at which the temperature is determined by the historical day-night temperature difference corresponds to the time point at which the salt spray concentration is determined by the historical salt spray concentration difference. Erosion area = lamp post surface area × sensitivity coefficient, and the erosion coefficient = erosion area / lamp post surface area.

[0054] 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.

[0055] 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 of salt spray temperature difference to the navigation light pole; the mechanical impact of wave force and the chemical damage of 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.

[0056] In a specific embodiment, the overload ratio = wave force / preset force; erosion impact ratio = erosion coefficient / preset coefficient; the preset force range is 4.8× N~5.4× N, preferably, the preset force value is 5.2× N; 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, and are not specifically limited here and will not be repeated.

[0057] The present invention determines the over-force ratio according to the wave force and the preset force, and determines the erosion impact ratio according to the erosion coefficient and the preset coefficient, so as to comprehensively evaluate the environmental severity of the sea surface environment to the breakwater navigation light pile, quantify the adverse impact of the environment on the light pile, and provide a scientific basis for the design and construction of the subsequent branch root piles 102 of the light pile, thereby helping to improve the stability and durability of the light pile in a complex marine environment.

[0058] See also Figure 4 As shown, Figure 4 The following is a step diagram for determining the number of branches according to an embodiment of the present invention; specifically, in step S5, it includes: Step S51, constructing a light pole foundation model according to the navigation light pole structure; Step S52, determining the force distribution of the lamp pile based on the lamp pile foundation model, the environmental severity, the lamp pile height and the main root pile 101 diameter; 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 .

[0059] It is understandable that different parts of the navigation light pole are subjected to different forces, and the branch root pile 102 needs to provide corresponding bearing capacity to ensure the stability of the light pole, so the force of the light pole is determined by combining the light pole foundation model, environmental severity, light pole height and the diameter of the main root pile 101. At the same time, since the concrete strength and steel bar strength directly affect the bearing capacity of the branch root pile 102, these factors are combined to jointly determine the number of branch root piles 102 to achieve the purpose of dispersing the load and protect the light pole foundation from being damaged.

[0060] 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. The finite element analysis software ANSYS, ABAQUS, etc. can be used to construct a model that can reflect the mechanical characteristics of the light pile foundation, and the sea wind dynamic pressure, wave force, and environmental severity are applied to the model. The finite element analysis software can be used to determine the force distribution of different parts of the light pile, 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 1.26× Preferably, the carrying capacity threshold is The safety factor has a value range of 1.2 to 1.5, and preferably, the safety factor has a value of 1.3. In implementation, 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 pile 102 and the strength of concrete and steel bars. No specific limitation is made here and no further elaboration is given.

[0061] 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.

[0062] In a specific embodiment, based on the above 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. The above model and the root pile force data can be used to simulate the force transmission path in the entire navigation light pile to determine the branch position and make the force uniform.

[0063] 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 the problem of 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 use of resources, and significantly improving the stability and reliability of the navigation light pile.

[0064] Specifically, in step S6, the axial force of the branch root pile 102 is determined according to 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.

[0065] It can be understood that the axial force refers to the force along the axis of the branch root pile 102, the applied stress is the stress generated by the branch root pile 102 under the vertical wave force, and the compressive strength is the mechanical performance index of the branch root pile 102 material itself. The vertical dimension is 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 then the vertical dimension can be determined, so that the stability of the constructed navigation light pile is better, and the vertical dimension is corrected based on the vertical wave force to ensure the axial force and accurately determine the material usage.

[0066] 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 the preset stress threshold, the vertical dimension is corrected. Vertical dimension correction amount = , wherein the compressive strength has a value range of 215MPa to 300MPa, preferably 250MPa; the preset stress threshold has a value range of 207MPa to 280MPa. In implementation, the value range and preferred value of the compressive strength and the preset stress threshold can be determined according to actual conditions, and are not specifically limited here and will not be elaborated.

[0067] 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 dimension 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. At the same time, the vertical dimension is corrected based on the vertical wave force to ensure the stability and anti-destruction ability of the navigation light pile under the action of external force, making the design of the navigation light pile more scientific and reasonable, and extending the service life.

[0068] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A construction method for a navigation light pile for a breakwater project, characterized in that: The navigation light poles include: A foundation part, comprising a main root pile and a plurality of branch root piles, wherein the branch root piles are fixedly connected to the lower part of the main root pile, and each branch root pile extends radially outward with the lower end of the main root pile as the center; A foundation cap, which is arranged on the top of the main root pile; A lamp post body, which is arranged above the base support and connected to the base support; The construction method of the navigation light pile comprises: At the installation location of the navigation light pole, the historical sea wind speed and the historical salt spray concentration of the sea wind are collected at a preset collection period, and the historical wave height, historical wave period and historical day and night temperature difference are collected; Determine 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; Determine 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 environment to the navigation light pole according to the combined force and the erosion coefficient; 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; 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.

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 according to 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 according to 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 according to 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 according to the historical sea breeze speed and air density, the drag coefficient is determined according to the lamp pile diameter, historical sea breeze speed, air density and surface roughness of the lamp pile, and the sea breeze force is determined according to 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 projection 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.

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

7. The construction method of the navigation light pile for breakwater engineering according to claim 6, characterized in that: 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.

8. The construction method of the navigation light pile for breakwater engineering according to claim 7, characterized in that: The root pile force data of the branch root pile is determined based on the lamp pile foundation model and the number of branches, and the branch position of the branch root pile is determined according to the root pile force data.

9. The construction method of the navigation light pile for breakwater engineering according to claim 8, characterized in that: 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.

10. The construction method of the navigation light pile for breakwater engineering according to claim 9, 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