67 results about "Coastal engineering" patented technology

The invention relates to the technical field of coast engineering, in particular to a beach change evolution inversion method combining numerical simulation and actually measured data, which comprises the following steps: S1, acquiring an actually measured shoreline data set of a current period; s2, establishing a wave-tidal current-sediment coupling numerical model; s3, outputting a simulated shoreline data set; s4, performing spatial matching on the actually measured shoreline data set and the simulated shoreline data set to generate a spatial discrete residual field; s5, taking the spatial discrete residual field as a constraint condition, and reversely solving an optimal hydrodynamic parameter combination; and S6, inputting the optimal hydrodynamic parameter combination into the wave-tide-sediment coupling numerical model, and outputting the beach evolution form in the future period. According to the method, dynamic coupling of the hydrodynamic parameters and the beach evolution process is realized by constructing an inversion optimization mechanism based on actual measurement data driving, and the accuracy of shoreline change simulation and the reliability of prediction are greatly improved.

The present invention relates to the technical field of coastal engineering, and disclosed is a method for evaluating a radiation hydrodynamic force for a concentric cylindrical structure, comprising the following steps: S1, coordinate system establishment: establishing a cylindrical coordinate system orθz and a Cartesian coordinate system oxyz by taking the intersection of the center of a concentric cylindrical structure and a still water surface as the origin, where the z-axis is vertically upward; S2, flow field division: dividing the entire flow field into an outer domain and an inner domain; S3, perforated boundary condition assumption; S4, determining radiation velocity potentials of the inner domain and the outer domain by means of governing equations and boundary conditions; and S5, by means of the expressions of velocity potential functions of the inner and outer domains, determining first-order radiation forces, added masses and damping coefficients generated by the vibration of an inner cylinder and an outer cylinder. The method takes into account both the effects of seismic and radiation hydrodynamic forces, provides accurate structural response prediction, fills the technological gap in the field of seismic analysis of concentric cylindrical structures as breakwater units, and provides a reliable basis for engineering design.

The invention discloses a day-by-day climate state and machine learning model fused marine environment forecasting method. The method mainly comprises the steps of determining a forecasting target as a marine environment parameter, a spatial position and a time range; collecting and processing marine environment parameter data, and performing quality control and cleaning; constructing a marine environment parameter data set and a day-by-day climate state data set obtained by averaging years of marine environment parameter historical data; the method comprises the following steps: building a machine learning model by taking marine environment parameter anomaly as a forecasting object, and training and optimizing the built machine learning model; performing reverse normalization processing on a marine environment parameter anomaly forecasting result output by the optimized machine learning model; and adding the data after the reverse normalization processing and the day-by-day climate state data to obtain a marine environment forecasting result of the target area. The marine environment forecasting method provides thoughts for development of future environment forecasting, and is expected to provide more accurate and stable services for the fields of resource management, ecological protection, coastal engineering and the like.

The invention relates to the technical field of coastal engineering, and discloses a coastal sand transport calculation method and system for a sandy coast, and the method comprises the following steps: obtaining target parameters and initial profile data of a target coast; calculating a profile change item caused by transverse sediment transport through a one-dimensional beach evolution model; an equivalent coastal distance parameter is innovatively introduced, and the coastal sediment transport gradient is rapidly estimated; calculating an elevation change item caused by coastal sediment transportation in combination with the gradient; overlapping transverse and coastal change items to obtain complete bed elevation evolution data; iteratively calibrating the equivalent coastline distance parameter based on historical terrain data until the simulation result conforms to the actually measured shoreline change; and finally outputting the calibrated coastal sediment transportation influence prediction. And the problem of prediction deviation caused by neglecting the coastal sediment transport gradient of a traditional one-dimensional beach evolution model can be solved.

The invention relates to the field of coast engineering and ecological restoration, and discloses vegetation concrete suitable for coast protection and a preparation method thereof.The concrete comprises cement, fine aggregate, coarse aggregate, a frozen plant growth matrix, water and an accelerator, and the matrix is composed of modified water-repellent clay, plant seeds, slow-release compound fertilizer, reinforced fibers and the like. The water resistance and the water retention capacity are remarkably improved through surface modification of the matrix, the slow-release compound fertilizer provides long-term nutrient support, and the matrix stability is improved through reinforced fibers; the interface bonding strength and the compression resistance of the concrete are optimized by adopting low-temperature mixing and an accelerator. The ecological protection system can adapt to the coastal tidal environment, and the ecological protection effects of high vegetation coverage rate and high durability are achieved.

The invention relates to the technical field of concrete protective materials, and particularly discloses a cement concrete component surface protective paint, a preparation method thereof, a coating and a construction method of the coating. The primer taking organosilane as a core component, the intermediate paint taking water-borne epoxy resin as a core component and the finish paint taking a water-borne paint base material as a core component are adopted. By means of a three-layer structure composed of the primer, the intermediate paint and the finish paint, the protective paint can protect concrete from inside to outside in an all-around mode, the durability of the concrete is remarkably improved, and therefore lasting protection on the concrete is fully achieved, the defect that concrete corrosion is easily intensified by inorganic ions such as chloride ions is overcome, and the service life of the concrete is prolonged. And the corrosion of the concrete in a coast engineering environment is reduced.

The invention relates to an island bedrock shoreline safety monitoring and early warning system and method, and belongs to the technical field of coast engineering safety. The system is based on a multi-source heterogeneous data fusion and intelligent decision technology, a sensing-computing-decision closed-loop system is constructed, and the system comprises a multi-parameter sensing array, an edge computing node, a hybrid transmission module, a cloud platform and an early warning terminal. The stress, displacement and environmental parameters of the rock mass are collected in real time by arranging fiber bragg grating, micro-seismic, visual and other multi-mode sensors; data preprocessing and local early warning are achieved through edge calculation, and an early warning threshold value is dynamically optimized in combination with cloud multi-physics coupling analysis; and yellow, orange and red three-level early warning is realized by adopting a grading trigger mechanism, and emergency response equipment is linked. The method breaks through the singleness and hysteresis of traditional monitoring, remarkably improves the early recognition capability of bedrock instability in a complex marine environment, has the characteristics of high precision, high adaptability and low false alarm rate, and can be widely applied to safety protection fields of coastal zones such as islands and ports.

This invention belongs to the field of coastal engineering and ecological restoration technology. It discloses a method for optimizing the design of beach ecological restoration trenches based on hydrodynamic simulation. The method includes: collecting beach hydrological datasets, topographic datasets, and ecological datasets, and preprocessing them. The hydrological dataset includes wave data, tidal current data, storm surge data, and sediment transport data. The topographic dataset includes shoreline slope, beach elevation, underwater topography data, and sediment source storage data. The ecological dataset includes tidal flat vegetation distribution, benthic organism density, ecologically sensitive area range, and water environment quality data. This invention, through the coupled processing of hydrological, topographic, and ecological multi-source datasets, obtains hydraulic reference values ​​and topographic adaptation values ​​for the trench, directly reflecting the regional dynamic conditions and the degree of topographic adaptation, significantly reducing the workload of manual calculation and trial and error.

The invention discloses a soft soil revetment design method considering wave influence, and belongs to the technical field of coast engineering. The method comprises the following steps: analyzing wave elements and load data by simulating tide and wave propagation, and determining main factors influencing the deformation and stress of a revetment structure; non-linear characteristics of soft soil are simulated, and a stress path of a soil body under the action of a wave load is considered; finite element software is adopted to establish a bank protection structure model, and factors of interaction, large deformation and contact problems of the structure and a soil body are considered; through data simulation, the influence of the wave height and the wave moment on the stress and deformation of the structure is clarified; and dynamic data of the environment where the bank protection project is located is fed back to numerical simulation of the bank protection structure, and input parameters of the model are continuously updated, so that the model can dynamically reflect changes of actual project working conditions. The wave load and soft soil coupling effect can be accurately reflected, the accuracy, safety and economical efficiency of revetment design are improved, and the method is suitable for various soft soil foundation revetment projects.

This invention discloses a method for identifying multiple wave breaking events in numerical calculations, belonging to the field of fluid dynamics in marine engineering. The method includes: determining saturated breaking wave state indices, modifying the wave energy dissipation expression, and constructing a cyclical discrimination logic combining critical breaking wave height and critical recovery wave height. This invention can accurately capture the multi-peak wave height characteristics during multiple wave breaking events, accurately reproduce the bimodal morphology of coastal current velocity profiles, significantly improve the accuracy of numerical simulations of wave propagation and nearshore circulation on gently sloping coasts, and provide reliable technical support for coastal engineering design, sediment transport prediction, and pollutant diffusion simulation.

This application discloses a method and system for assessing extreme environmental conditions in coastal engineering, relating to the fields of marine and coastal engineering technology. The method includes: establishing wave propagation deformation conversion relationships; performing quality control on multi-source wave-tide data; performing tidal level decomposition on the total water level time series; identifying multiple independent extreme wave-tide coupling events, extracting characteristic parameters to form a multi-dimensional extreme sample set, and establishing a joint distribution model; determining the target probability level and constructing an environmental profile with equal exceedance probabilities; selecting representative combined operating conditions, and using the wave propagation deformation conversion relationships to convert the representative combined operating conditions to nearshore control points to obtain design wave elements. This application, driven by multi-source wave-tide data, establishes a joint distribution model of wave height, period, and tidal level and constructs an environmental profile with equal exceedance probabilities, achieving quantitative determination of extreme design wave conditions with clear joint probability meanings, thus improving the scientific and economical nature of coastal engineering design.

The application presents a natural-based solution to the problem of coastal protection, based on soft engineering and minimising use of raw materials and energy use. Through the integration of field work, laboratory analysis, and in situ formation, a multidisciplinary approach incorporating sciences such as geomorphology, microbiology, geology, morphodynamics and engineering is employed. The process facilitates the development of an artificially-triggered, but naturally-developed submerged structure, offering a comprehensive approach to coastal protection that can have diverse applications in coastal engineering.

The invention provides a ship off-shore standard determination method and device, electronic equipment and a storage medium, and belongs to the technical field of coastal engineering.The method comprises the steps that the characteristic wave height, the average wave period, the deepwater wavelength corresponding to the average wave period, the displacement corresponding to the full-load capacity of a ship and the ship width during ship off-shore operation are obtained; the maximum mooring force of the ship is determined based on the characteristic wave height, the average wave period, the deepwater wavelength corresponding to the average wave period, the displacement corresponding to the full-load capacity of the ship and the ship width during offshore operation of the ship; based on the maximum mooring force of the ship, the off-berthing wave height of the ship is determined, and the off-berthing standard of the ship is determined based on the off-berthing wave height of the ship. According to the method, related factors such as the characteristic wave height, the average wave period, the deepwater wavelength corresponding to the average wave period, the displacement corresponding to the full-load capacity of the ship, the ship width and the like during offshore operation of the ship are comprehensively considered, and therefore the purpose of accurately determining the ship off-shore standard is achieved.

The application presents a natural-based solution to the problem of coastal protection, based on soft engineering and minimising use of raw materials and energy use. Through the integration of field work, laboratory analysis, and in situ formation, a multidisciplinary approach incorporating sciences such as geomorphology, microbiology, geology, morphodynamics and engineering is employed. The process facilitates the development of an artificially-triggered, but naturally-developed submerged structure, offering a comprehensive approach to coastal protection that can have diverse applications in coastal engineering.

The invention belongs to the technical field of coast engineering measurement, and particularly relates to an automatic measuring vehicle for measuring an artificial shoreline. The measuring vehicle comprises a vehicle body, a high-precision GPS receiver, a laser sensor, a controller and a safety protection system. The controller controls the vehicle body to automatically run along the shoreline through a closed-loop algorithm, synchronously collects position and distance data, and solves the coordinates of the shoreline; meanwhile, multiple levels of safety protection mechanisms, such as an early warning air bag, graded deceleration and an emergency separation structure, are integrated, the system adapts to a complex levee top environment, efficient, automatic and high-precision shoreline surveying and mapping operation can be achieved under the conditions of a no-fly zone and the like, and the measurement safety and the data reliability are remarkably improved.

The invention relates to the technical field of coastal engineering, and discloses a long-period wave-reducing breakwater based on the water wave resonance principle. The breakwater comprises a C-shaped resonator and a plurality of pile legs, wherein a base is commonly connected between the C-shaped resonator and the plurality of pile legs, the C-shaped resonator is detachably connected to the upper end of the base through bolts, and the plurality of pile legs are circumferentially distributed at the lower end of the base, and the base, the C-shaped resonator and the plurality of pile legs jointly form a wave-reducing unit, which is arranged in a rectangular array to form a breakwater, and the outer diameter, the inner diameter and the opening size of two adjacent C-shaped resonators in the array are gradually changed according to a certain rule, and the C-shaped resonator utilizes a large cavity and a small opening structure to induce resonance to reduce long waves several times the wavelength of a characteristic size of a cylinder, so that waves of different frequencies undergo local resonance and wave-reduction at different spatial positions of the array-type breakwater, and long-period waves within a wide frequency domain are effectively reduced, and a sheltered water area with stable mooring is formed behind the breakwater.

The present application relates to the technical field of port and coastal engineering, and more particularly to a light-weight outfitting wharf structure without cross beam and a construction method thereof; the structure comprises an upper structure, a lower structure and a mooring facility; the upper structure comprises longitudinal beams, pipe trench beams and face plates; the lower structure comprises straight piles and forked piles; and the mooring facility comprises a ship-berthing structure, fenders and mooring columns. The present application adopts pile foundation for the lower structure of the wharf, adopts longitudinal beam system + superimposed face plate structure for the upper structure, directly casts the longitudinal beams on the pile foundation, sets a pair of forked piles under the longitudinal beams to resist horizontal force, and makes the bottom elevation of the longitudinal beams level with the designed high water level, so that the wharf is not affected by the rise and fall of tides in the engineering area, can be constructed all day long, and greatly shortens the construction period; under the premise of meeting the requirements of structural safety and heavy lifting process, the prefabricated parts are miniaturized, large-scale hoisting equipment is not needed, the parts can be manufactured and installed on site, the amount of concrete, steel bars and formwork is greatly reduced, and the structure is more lightweight.

This invention proposes a method and system for stress distribution analysis of permeable breakwaters under different wave conditions, relating to the field of coastal engineering technology. The method includes: real-time synchronous acquisition of wave information and structural response information using sensors deployed at structural components and water-adjacent areas, generating a synchronous wave-structure response dataset; based on this dataset, analyzing the correspondence between wave characteristics and structural strain data, grouping by wave phase time sequence and constructing a structural stress topology map to generate a wave-stress correlation map; determining the correlation map region based on the characteristic information of the current wave condition and the map; and analyzing the structural stress distribution information contained in this region to obtain the stress distribution of the permeable breakwater under the current wave condition. This achieves a fine mapping between wave dynamic characteristics and structural stress distribution, improving analysis accuracy and efficiency.

The invention provides a porous coconut fiber energy dissipation unit and a wave dissipation system construction method, and belongs to the technical field of water conservancy projects of coast engineering and ecological restoration. The energy dissipation unit body is a prolate cube, steel gauze elements are arranged on three sides, a perforated plate is arranged on the wave back side, the bottom is closed, a detachable vegetation upper cover is arranged on the top, and porosity-adjustable coconut fibers are filled in the energy dissipation unit body. The wave back side concave clamping grooves can be clamped with the guide rails to achieve vertical elevation adjustment, and the T-shaped grooves and the tenons on the two sides can be spliced into different arrays. Fertile plants are covered on the vegetation to construct an ecological wave dissipation belt, and a sensor mounting space is reserved in the unit. Physical model tests show that the wave dissipation and flow stabilization effects are good. The energy dissipation unit structure can be applied to construction of various wave dissipation systems, specific adjustment is carried out based on different scenes, and the energy dissipation unit structure has the characteristics of unitization, modularization and the like, adapts to multiple layout scenes, is convenient to construct and maintain and has the functions of wave dissipation and ecological restoration.

The application provides a kind of weight calculation method and device of armor block, belong to coastal engineering technical field, this method includes: based on the wave height of target sea area, wave period, slope gradient and spectral peak rise factor, the stability coefficient of twisted king block, the stability coefficient of double block and the stability coefficient of fill block stone are calculated;Based on the stability coefficient of twisted king block, the stability coefficient of double block and the stability coefficient of fill block stone calculated, the required armor block structure is determined;Based on the required armor block structure, and the wave height of target sea area, wave period, slope gradient and spectral peak rise factor, the weight of the required armor block is determined.The application fully considers the wave height of target sea area, wave period, slope gradient and spectral peak rise factor, and then selects the most stable armor block structure, and determines the weight corresponding to the armor block structure, realizes the purpose of enhancing the stability of armor block.

The invention discloses a hydrodynamic sediment physical model experiment method for simulating variable tide level combined wave action. The method comprises the following steps: building a physical model experiment system comprising an experiment water tank, a tide level simulation system, a wave generation system and a measurement system; determining a model tide level process and a wave element sequence according to the prototype environment data; calibration of control parameters of the tide level simulation system is carried out in an empty water tank state, and calibration of control parameters of the wave generation system is carried out according to different water depths and wave elements; after a bottom bed model is laid, the two systems are operated synchronously, the water level changes dynamically, corresponding waves are generated, and variable tide level and wave combined action simulation is achieved; and hydrodynamic force and bed topographic data are collected through the measuring system for analysis. Accurate combined simulation of dynamic sea level change and wave action is achieved, the sea level simulation system is simple in structure, low in cost and easy to install and control, the simulation precision of the complex water and sediment movement process is improved, and an economical and reliable experimental means is provided for coast engineering research.

The invention relates to the technical field of image analysis, in particular to a beach vegetation restoration evaluation method based on image feature analysis, which comprises the following steps: acquiring remote sensing images of a target beach restoration area in two time phases before and after an environment disturbance event occurs; performing object-oriented segmentation on the remote sensing images of the two time phases to generate a plurality of vegetation objects, and extracting morphological stability characteristics and ecological stress resistance characteristics of each vegetation object in the two time phases; and calculating a functional toughness index of each vegetation object based on changes of the morphological stability characteristics and the ecological stress resistance characteristics before and after the environmental disturbance event, and evaluating the overall vegetation restoration effect according to the functional toughness index. According to the method, the problem of uncertainty of traditional graph selection according to a fixed time interval is solved, so that vegetation restoration evaluation has the advantages of event driving, accurate time phase and effective data, and technical support is provided for post-disaster ecological monitoring, coastal engineering post-evaluation and the like.

The application discloses a kind of optimal filling rate calculation method of multilayer sand-filled geotextile pipe coast beach protection, belong to the technical field of coast protection engineering.The quantitative relationship between filling rate and geotextile pipe elliptical section size is established, the overall multilayer structure is taken as the research object, the anti-sliding torque and sliding torque are calculated, and the explicit function relationship between the anti-sliding stability safety factor and the filling rate is derived;Finally, the safety factor and the filling rate relationship curve is drawn, and the filling rate corresponding to the highest point of the curve is taken as the optimal filling rate.The application can scientifically and quantitatively determine the optimal filling rate of multilayer sand-filled geotextile pipe under different marine environmental conditions, effectively reduce the waste of filling material under the premise of ensuring the anti-sliding stability of the structure, significantly reduce the engineering cost, and improve the wind and wave erosion resistance and long-term service life of the structure.The method is simple, accurate and suitable for various coastal engineering such as coast protection, sea embankment protection, beach management, etc.

The application is a long-acting self-repairing low-carbon concrete suitable for a coastal environment and a preparation method thereof, and belongs to the technical field of composite material preparation.The concrete is prepared from the following components in parts by mass: cement 360-400 parts;water 145-152 parts;sand 775-785 parts;stone 1075-1085 parts;water reducing agent 3-5 parts;self-repairing biochar 20-40 parts;and corrosion-resistant additive 0.5-1 part.The application solves the three problems of strength loss under high biochar content, non-sustainable microbial self-repairing function and serious marine biological chemical corrosion.The experiment shows that the 28-day compressive strength is increased by more than 8% compared with the benchmark, the crack area repair rate is more than 77.5%, and the number of marine fouling organisms is significantly reduced, thereby providing a long-life, low-maintenance integrated material solution for coastal engineering structures.

The invention discloses a wind and wave simulation method for a coastal engineering water tank test, the method is realized through a water tank wind generation device and a wave maker, and the water tank wind generation device and the wave maker are arranged at two opposite ends of a water tank along the length direction; according to test requirements, the walking trolley is moved to enable the fan assembly to move in the length direction of the water tank, the telescopic piece is driven to act to enable the fan assembly to move in the height direction of the water tank, and therefore the wind speed and the wind quantity are simulated at different positions in the water tank. According to the invention, the wind generating machine can move along the height direction of the water tank through the multi-stage telescopic cylinder and can be flexibly adjusted along the height direction, so that the wind generating requirements of different test water depths can be ensured; in addition, the whole fan can move in the length direction of the water tank through the walking trolley, and the wind generation requirements of different test positions can be met.

This invention relates to a typhoon-wave-current hazard assessment method based on physical field coupled numerical simulation. The method includes: selecting historical or future typhoon events affecting a target area from historical typhoon trajectory data or artificially synthesized future typhoon trajectory data to generate a typhoon event set; modeling a two-dimensional typhoon mixed wind field based on the constructed typhoon event set, combined with typhoon trajectory and intensity parameters; performing a physical mechanism-based typhoon-wave-current coupled numerical simulation on the target area to generate corresponding wind, wave, and current evolution time history data; and extracting the event maximum and annual maximum values ​​from the simulated wind, wave, and current time history data, and using extreme value analysis to assess hazard risk. This invention is not limited to historical typhoon events; the entire assessment framework can be applied to the hazard assessment and analysis of future typhoon events considering the impact of climate change, improving the climate adaptability and resilience of coastal engineering infrastructure against typhoon-related complex disasters.

The invention relates to the technical field of port and coast engineering, in particular to a fabricated laminate-foundation pile wave dissipation structure and a construction method thereof. The structure comprises a foundation pile, a laminate module, a wing plate, a building material, pile core concrete and a riprap protection bottom, the foundation piles comprise the front-row foundation piles and the rear-row foundation piles which are arranged in a staggered mode. The laminate module comprises a laminate structure and a steel sleeve; the shelf board modules are arranged on the pile tops of the foundation piles in a sleeving mode and are connected through building materials to form a space portal frame type structure. Conventional densely-arranged foundation piles are arranged in a staggered mode to form the front row and the rear row of the foundation piles with the wing plates, the assembled laminate modules and the foundation piles are connected into a portal frame type structure, so that the overall stress condition of the structure is better, the wave dissipation capacity is improved, the soil stress area is increased, the horizontal bearing capacity of the foundation piles is improved, and stress is dispersed; the wave force is reduced by utilizing the permeable characteristic of the laminate, and the survival condition of the structure is optimized; and meanwhile, the whole process is simpler and more convenient through assembly type construction, the construction period is greatly shortened, and the green and environment-friendly engineering concept is met.

The present application relates to the technical field of coastal engineering, and discloses a method and system for calculating sand transport along a sandy coast, which comprises the following steps: obtaining target parameters and initial profile data of the target coast; calculating a profile change item caused by transverse sand transport through a one-dimensional beach evolution model; innovatively introducing an equivalent alongshore distance parameter to quickly estimate the alongshore sand transport gradient; combining the gradient to calculate an elevation change item caused by alongshore sand transport; superimposing the transverse and alongshore change items to obtain complete bottom elevation evolution data; iteratively calibrating the equivalent alongshore distance parameter based on historical topographic data until the simulation result conforms to the measured shoreline change; and finally outputting the calibrated alongshore sand transport impact prediction. The present application can solve the prediction deviation problem caused by the traditional one-dimensional beach evolution model ignoring the alongshore sand transport gradient.

The invention discloses a wave measurement method based on a light and shade shape recovery method of an unmanned aerial vehicle camera shooting function, and belongs to the technical field of coast engineering image measurement. Comprising the following steps: acquiring optical information of an actually measured site, calibrating a photographic imaging system, constructing a land reference object platform, establishing a three-dimensional shape based on an SFS reference object, calculating a size transformation coefficient, establishing a three-dimensional shape based on an SFS sea surface wave, and acquiring wave parameters. According to the SFS wave measurement method based on the camera shooting function of the unmanned aerial vehicle, waves are shot through the camera shooting imaging function of the unmanned aerial vehicle, firstly, the size conversion coefficient is calculated in the mode of introducing a reference object, then three-dimensional recovery is conducted on the sea surface wave shape based on the SFS method, and finally the actual three-dimensional size of the sea surface waves is obtained. In the field of ocean engineering wave measurement, the method has high accuracy, flexibility and convenience. The problems that a traditional wave measurement method can only obtain the wave height of a specific point and the cost of obtaining wave parameters is high are solved, and the method has certain technical benefits and engineering significance.

The invention discloses microorganism self-repairing shell concrete and a preparation method thereof, belongs to the technical field of engineering materials, and aims to solve the problems of land occupation and environmental pollution caused by stacking of a large number of waste shell resources and insufficient durability caused by easy cracking of a coastal engineering concrete structure in the prior art. The shell sand comprises the following components in parts by weight: 95-105 parts of shell sand; 7-8 parts of a microbial liquid; 85-90 parts of a microbial nutrient substance; 55 to 58 parts of cement; 28 to 30 parts of water; 0.4 to 0.6 part of a water reducing agent; 0.07 to 0.09 part of a defoaming agent; the concrete material is suitable for coastal environment protection and engineering construction, and the purposes of waste resource utilization, crack self-repairing and concrete durability improvement can be achieved.