48 results about "Coral sand" patented technology

The utility model discloses a coral sand particle size and shape double sorting device which comprises a plurality of sorting systems, a sorting system fixing support and a screening machine, and the sorting systems comprise a particle size sorting system, a flaky particle sorting system and a block-shaped and rod-shaped particle sorting system which are sequentially connected from top to bottom. The screening machine is compatible with an existing standard inspection screening machine and is simple in structure, complex mechanical equipment does not need to be introduced on the basis that a traditional particle size sorting function is reserved, the screen is customized according to needs during use, and the equipment transformation cost is remarkably reduced; the device disclosed by the utility model can be used for simultaneously screening various sample particles in different target particle size ranges and respectively screening the sample particles in different target particle size ranges in a sheet shape, a block shape and a rod shape.

The invention relates to a coral sand modification method based on calcium-based solid waste carbonization. Comprising the steps that coral sand with the particle size ranging from 0 mm to 4.75 mm is placed in a reaction kettle, and vacuumizing is conducted to enable the coral sand to be in a negative pressure environment; the method comprises the following steps: mixing calcium-based solid waste micro-powder with the particle size distribution of 0-75 microns and carbonization activity with seawater, performing ultrasonic stirring to form uniform calcium-rich turbid liquid, and adjusting the alkalinity of the calcium-based turbid liquid; pouring the calcium-rich turbid liquid into the kettle under the action of negative pressure, introducing CO2 into the kettle when the turbid liquid submerges the coral sand, and discharging the calcium-based turbid liquid after curing for a preset time; and repeating for multiple times, ending carbonization curing, taking out, and drying in a drying box to obtain the modified coral sand. According to the method, the flue gas, the calcium-based solid waste and the like can be subjected to resource utilization; the operation process is simple, the raw materials are obtained locally, and the crushing strength of the modified coral sand is obviously improved.

The application discloses high-performance light soil adopting fine coral sand and a preparation method thereof. The light soil comprises the following components in parts by weight: 100-400 parts of fine coral sand, 10-50 parts of cement, 20-100 parts of seawater and 0-5 parts of additive agent. The fine coral sand is micron-level powder obtained by crushing and grinding of coral sand, has a particle size distribution of 10-300 microns and a specific surface area of 400-600 m2 / kg. The cement content is calculated according to 10%-20% of the mass of the fine coral sand. The additive agent comprises a water reducing agent and a stabilizer. The preparation method comprises fine grinding of the coral sand, preparation and pretreatment of raw materials, dry material premixing and activation, air bubble group preparation, mixing and stirring, and pouring and curing. The application realizes synergistic enhancement of hydration reaction and micro-filling, effectively improves the mechanical properties and durability of the light soil, promotes the transformation of island reef engineering construction to green environmental protection and resource utilization, realizes resource utilization of the coral sand and provides a new way for reducing engineering cost.

The present application relates to the field of building technology, and more particularly to a method for reinforcing coral sand based on MICP-coconut shell fiber, which is suitable for reinforcing the foundation of coral sand in tropical marine island reef engineering and the like. The present application aims to overcome the shortcomings of the existing coral sand reinforcement technology and provide a method for ecologically and low-carbon reinforcing of coral sand based on MICP-coconut shell fiber. By constructing a synergistic system of "fiber skeleton-microbial mineralization-sand body cementation", the ecological, low-carbon and efficient reinforcement of the foundation of coral sand is achieved, and the strength, toughness, uniformity and ecological compatibility of the foundation are simultaneously improved.

The invention relates to the field of ecological fresh water promotion, and particularly discloses a habitat plaque configuration method for reducing tropical coral island water loss, which comprises the following steps: selecting tropical coral island suitable plant species, and planting and maintaining according to different habitat plaque configuration schemes by taking coral sand as a planting substrate; simulating different wind speed modes by using a wind tunnel experiment device, tracking and observing the wind field, the windproof effect and the moisture evaporation characteristic in the forest network under different configuration schemes, and obtaining observation data; and analyzing and comparing observation data, and screening out a target vegetation configuration mode capable of reducing water loss at the maximum efficiency under different wind speed modes. By quantitatively evaluating the regulation and control effects of different vegetation structures on the wind field and water evaporation, the cost of forming fresh water in the tropical coral island can be reduced, habitat plaque configuration is performed purposefully, water loss of the tropical coral island is reduced, efficient water utilization is realized, and the method is suitable for large-scale popularization and application. And scientific and efficient technical support is provided for water resource protection and ecological construction of tropical coral islands.

This invention discloses a method, device, and storage medium for calculating the bearing capacity of a coral sand-gravel pile composite foundation. The calculation method includes: determining the initial void ratio, minimum void ratio, unit weight, internal friction angle, crushing energy dissipation coefficient, and internal friction angle of the original coral sand; calculating the lateral ultimate stress of the coral sand by introducing a crushing energy dissipation correction term; calculating the ultimate bearing capacity of a single pile according to the bulging limit equilibrium formula; analyzing the bearing capacity characteristic values ​​of the foundation design load and layout scheme, and adjusting the gravel pile reinforcement parameters or layout scheme; this calculation method quantifies the "particle crushing effect" of coral sand and introduces a crushing energy dissipation correction term to achieve coupled correction of the bulging balance calculation formula; field load tests show that the bearing capacity of the corrected composite foundation is reduced to less than 5%, significantly reducing the calculation error of the traditional formula, and is suitable for rapid evaluation and design optimization of the bearing capacity of coral sand vibratory compaction gravel pile composite foundations.

The present invention discloses a method for constructing a revetment structure using a double-layer mold bag. A wave barrier is provided at the top of the bank slope, a recessed area is excavated at the bottom of the bank slope, and a double-layer mold bag is laid on the bank slope. The double-layer mold bag has two filling chambers, an upper layer and a lower layer. The lower layer filling chamber is filled with coral mortar, and the upper layer filling chamber is filled with coral sand concrete. This double-layer filling chamber mold bag structure can ensure high strength of the revetment surface because its upper filling chamber is filled with coral sand concrete. In addition, because its lower filling chamber is only filled with coral mortar, it can save a large amount of concrete compared to existing mold bags with a single-layer filling space, fully utilizing the abundant local coral sand resources on the coast, lowering costs, and facilitating construction.

The invention discloses a coral sand gravel pile composite foundation bearing capacity calculation method and device and a storage medium. The calculation method comprises the steps that the initial void ratio, the minimum void ratio, the weight, the internal friction angle, the crushing energy consumption coefficient and the stone internal friction angle of original coral sand are measured; a crushing energy consumption correction term is introduced to calculate lateral limit stress of the coral sand; calculating the ultimate bearing capacity of the single pile according to an expansion ultimate balance formula; analyzing a foundation design load and an arrangement scheme bearing capacity characteristic value, and adjusting a gravel pile reinforcement parameter or an arrangement scheme; according to the calculation method, the particle crushing effect of coral sand is quantified, and a crushing energy consumption correction term is introduced to realize coupling correction of a ballooning balance calculation formula; a field load test shows that the bearing capacity of the corrected composite foundation is reduced to be within 5%, the calculation error of a traditional formula is greatly reduced, and the method is suitable for rapid evaluation and design optimization of the bearing capacity of the coral sand vibro-replacement gravel pile composite foundation.

The application discloses a flexible shaft well structure with anti-seismic and anti-seepage functions and a construction method thereof, and belongs to the field of building construction. The flexible shaft well structure comprises a reinforced concrete lining and a load-bearing ring arranged outside the reinforced concrete lining, the load-bearing ring is formed by circumferentially overlapping a plurality of flexible piles around the reinforced concrete lining, the flexible piles are formed by consolidating a permeable polymer and sand, and a polymer waterproof shock insulation buffer layer is arranged between the reinforced concrete lining and the load-bearing ring, and the polymer waterproof shock insulation buffer layer is formed by expanding a polymer grouting layer. The shaft well structure has high anti-seismic and anti-seepage performances, and is suitable for a coastal coral sand reclamation layer. A flexible load-bearing ring with anti-seismic and anti-seepage functions is formed by polymer permeation grouting, a polymer waterproof shock insulation buffer layer is formed by grouting between the reinforced concrete lining structure and the load-bearing ring, and the whole structure has anti-seismic and anti-seepage effects. In the excavation process, complicated dewatering operations are not needed, and a large amount of financial resources and time are saved.

This invention provides a self-triggered reinforcement structure and method for coral sand foundations under seismic loading. The structure includes a shell, a core, an induction excitation system, an oil-secreting module, and a pressure spraying system. The core is located inside the shell cavity and a weak magnet is fixed on it. The induction excitation system includes a MEMS accelerometer chip, a Hall effect chip, and an iron core. A coil is mounted on the iron core. The MEMS accelerometer chip and the Hall effect chip are used to monitor the seismic magnetic effect and acceleration variations. When the seismic magnetic effect occurs and the acceleration exceeds a threshold, the coil and the iron core become electromagnets with the same polarity as the weak magnet, and the core is inserted into the soil for reinforcement. The oil-secreting module is used to reduce the friction between the core and the shell, and the pressure spraying system is used to cause the reinforcement grout inside the shell to overflow for reinforcement. This invention can monitor the dynamic load state in real time. Through the self-triggered core structure in the pressure spraying system and induction excitation system, the surrounding soil of the reinforced structure is actively grouted and reinforced to form a vertical reinforcement structure.

The invention discloses durable coral mortar which is prepared from the following raw materials in parts by weight: 900-1100 parts of coral sand; 405 to 495 parts of LC3 cement; 3.888 to 4.752 parts of a water reducing agent; and 202.5 to 247.5 parts of water. The mortar has good mechanical properties and can effectively resist seawater erosion, and the preparation method of the mortar is energy-saving and environment-friendly.

The invention discloses an environment-friendly loose and solid composite pile system for treating a coral sand roadbed and a construction method.The system comprises a gravel layer, a medium sand drainage layer, a bearing platform, composite piles and a conductive drainage plate, the medium sand drainage layer is laid on the periphery of the bearing platform, and the height of the upper surface of the medium sand drainage layer is flush with that of the bearing platform; a gravel layer is laid on the surface of the bearing platform and the surface of the medium sand drainage layer, the bottom face of the bearing platform is fixedly connected with a composite pile, the composite pile comprises a discrete pile and a rigid core pile, the rigid core pile is arranged in the middle of the discrete pile, a plurality of conductive drainage plates are inserted into the periphery of the composite pile, and the conductive drainage plates are laid below the medium sand drainage layer. The scattered and solid composite pile system has high adaptability and can be flexibly adjusted according to different geological conditions and construction requirements. And the bearing capacity, the stability, the drainage performance and the anti-liquefaction effect of the coral sand foundation are remarkably improved.

The application provides an expansion pile foundation structure on coral sand and a construction method, a prefabricated pile body is composed of a plurality of separated small piles; a middle part of the prefabricated pile body is provided with a hollow structure, the hollow structure is used for inserting a pile pressing iron rod and an internal support structure into the hollow structure when the prefabricated pile body is driven into the coral sand; after the internal support structure is inserted into the hollow structure, a reserved space is formed between the outer wall of the internal support structure and the inner wall of the hollow structure; and grouting is carried out in the reserved space. The pile foundation structure is simple in operation and convenient to implement experiments, can reach the construction standard, can effectively solve the settlement problem of the pile foundation on the coral sand foundation, is beneficial to the stability of the upper structure of the pile foundation, and ensures the safe construction of the upper building.

The application discloses a kind of farmland repair safe utilization methods, including farmland repair and farmland safe utilization, specifically are as follows: (1) soil acidification conditioning: the contaminated farmland is ploughed, according to 800-1400kg / mu is applied organic fertilizer, then in the soil in agricultural product sowing before acidification conditioning agent is scattered, scattering amount is 1000-2000kg / hm 2 ; (2) micro-fertilizer regulation: during the growth period of agricultural products, microelement fertilizer is applied; (3) water regulation technology: during the key period of agricultural product growth, water regulation measures are adopted to maintain appropriate moisture in the soil; the acidification conditioning agent comprises 15-25 parts of humic acid, 4-10 parts of montmorillonite and 30-50 parts of modified coral sand. The application effectively realizes the effective repair and safe use of the contaminated farmland through the improvement of soil acidification conditioning and micro-fertilizer regulation.

The invention relates to the technical field of cement production, in particular to a method for preparing a low-carbon cement-based material from coral sand and metakaolin, which comprises the following steps: S1, raw material preparation: preparing the following dry basis components in parts by weight: 30-60 parts of ordinary Portland cement, 80-120 parts of coral sand, 10-30 parts of metakaolin, 25-40 parts of water and 0.3-1.5 parts of water reducing agent; s2, dry mixing: putting the ordinary Portland cement, the coral sand and the metakaolin weighed in the step S1 into a stirrer, and rotating and stirring for 3-5 minutes at a low speed until the solid powder and the particles are uniformly mixed, so as to obtain a dry mixture with uniform appearance and color. According to the method for preparing the low-carbon cement-based material from the coral sand and the metakaolin, industrial waste residues such as fly ash and slag with obvious regional distribution characteristics are not used as main raw materials, and the problem that an existing substitution technology is difficult to popularize due to insufficient admixture supply and high transportation cost is effectively solved. And the method is particularly suitable for engineering construction in special scenes such as ocean islands and resource-deficient areas.

This utility model discloses a revetment structure using coral sand combined with geocell construction. An internally constructed geocell-type geotextile bag is laid on the bank slope, and the interior of the geocell-type geotextile bag is filled with coral sand. The internally constructed geocell-type geotextile bag includes a bag body, transverse reinforcing bars, longitudinal reinforcing bars, vertical reinforcing bars, and geocells. The bag body is bag-shaped, including a top surface, a bottom surface, and four side covers. Transverse and longitudinal reinforcing bars are evenly spaced on the top surface of the bag body, forming a grid array. Transverse and longitudinal reinforcing bars are also evenly spaced on the bottom surface of the bag body, forming a grid array. The vertical reinforcing bars connect the intersections of the grid arrays on the top and bottom surfaces of the bag body. The geocells are located inside the bag body, allowing the filled coral sand to remain stably within the internally constructed geocell-type geotextile bag, forming a stable revetment structure.

The application discloses a kind of concrete slurry of underwater 3D printing, belong to building material technical field, the slurry includes main material, auxiliary material and recycled material, by weight fraction, the main material is composed of 100-120 parts of cement, 15-30 parts of silica ash, 10-15 parts of coral sand, 8-12 parts of quartz sand, 35-40 parts of water;The auxiliary material is composed of water reducing agent 1-2.5 parts, anti-dispersion agent 1-1.5 parts, cellulose 0.5-1 part, plant glue 0.8-1.5 parts;The recycled material is marine recycled plastic body, including polyethylene terephthalate and / or polystyrene and / or polypropylene and / or polyethylene 20-35 parts.The underwater 3D printing concrete slurry of the application can meet the liquidity when printing, also has the requirement of meeting anti-dispersibility, and the marine garbage recycling material is combined with the substance applied, can consume such substances without affecting the practicability of the product of the application, help environmental protection.

The utility model is suitable for the technical field of sand foundation packing-free vibroflotation tests, and provides a packing-free vibroflotation test device in foundation treatment in coastal sand areas, which comprises a crawler used for driving the vibroflotation test device to move; the steel frame is mounted on the crawler; the hoisting machine is mounted on the crawler; the guide wheels are mounted on the steel frame; the steel wire rope is arranged on the hoisting machine and is connected with the guide wheel; and the vibroflotation mechanism is arranged at one end of the steel wire rope and is used for carrying out a vibroflotation test. The filler-free vibroflotation test device for foundation treatment in the coastal sandy soil area is long and short in single-point treatment time, low in energy consumption and suitable for special geologies such as coral sand and marine sedimentary sand.

The invention relates to a standardized sample preparation device and method based on a coral sand SHPB test. The standardized sample preparation device comprises a base, a bottom cushion block arranged above the base and a sleeve arranged above the bottom cushion block, a driving hammer seat abutting against the upper portion of a sample is arranged in the sleeve, a compaction hammer is movably connected to the driving hammer seat in the vertical direction, and a limiting piece is arranged on the compaction hammer. The device adapts to sample preparation requirements of non-viscous and weakly viscous sand such as coral sand and calcareous sand, a heat shrinkage film packaging technology is combined, the passive confining pressure during sample impact can be regulated and controlled in a mode of overlapping multiple layers of heat shrinkage films, accurate reduction of test working conditions and actual engineering scenes is realized, the application range of the device is expanded, and the device is suitable for large-scale popularization and application. Precise limiting and leveling in the compaction process are achieved, the compactness and uniformity of a sample and the flatness of a cushion block are guaranteed, the sample preparation process is simplified, the sample preparation efficiency is improved, SHPB test equipment is prevented from being damaged, and universality and practicability are both achieved.

The present application relates to the field of ecological restoration, and more particularly to a method for restoring the ecology of a coastal wetland, which comprises the following steps: removing invasive species from the area to be restored; laying an ecological restoration substrate; planting the sea grass in a cluster-strip composite pattern; introducing biological communities in batches every two months; setting up a tidal response system and an intelligent monitoring platform to monitor the condition of the area to be restored; and the ecological restoration substrate comprises 40% oyster shells, 40% coral sand and 20% bentonite. The method for restoring the ecology of a coastal wetland provided by the present application forms an "algae-grass barrier" by planting sea grass and eucheuma alternately, effectively improves the water transparency and promotes photosynthesis; the disturbance behavior of benthic animals such as sea cucumbers enhances the oxygen penetration depth and oxidation-reduction potential (Eh) of the sediments, and improves the bottom environment; and the gradient buoyancy planting device realizes tidal self-adaptation, ensuring the stable growth of the sea grass under different water level conditions.

The application discloses an atoll engineering alkali magnesium sulfate cement coral concrete and a preparation process thereof, and belongs to the technical field of building engineering materials. The concrete formula comprises, in parts by mass, cementing material 560-1085 parts, coral sand fine aggregate 380-1060 parts, coral coarse aggregate 163-454 parts, mixing water 186-307 parts and naphthalene-based high-efficiency water reducing agent 11-28 parts. The cementing material is made of light-burned magnesia, magnesium sulfate pentahydrate, additive and active mineral admixture. The active mineral admixture is a mixture of coral micro powder and granulated blast furnace slag micro powder or fly ash. The application has the advantages of effectively reducing construction cost and engineering period, fast hardening and early strength, good mechanical property, low steel corrosion rate, zero expansion and zero shrinkage, and low cracking probability.

The application discloses a kind of composite water-retaining materials suitable for coral sandy soil and preparation method and use method thereof, the preparation method includes: accurately taking the following components by mass fraction: polyvinyl alcohol 2~20 parts; Water 50~200 parts; Pore filler 5~30 parts; Crosslinking agent 1~30 parts; Catalyst 5~30 parts; Foaming agent 1~15 parts; Superabsorbent polymer 10~30 parts; Polyvinyl alcohol and water are mixed, dissolved in 40~100 DEG C water bath for 1~4h, to obtain polyvinyl alcohol aqueous solution; Pore filler, crosslinking agent, catalyst and foaming agent are added to polyvinyl alcohol aqueous solution, after stirring evenly, high water-absorbent resin is added to the reaction system, and stirring is made to be uniformly dispersed in the reaction system; The reaction system is placed in the oven at 30~80 DEG C and cured for 1~8h, to obtain the composite water-retaining material. The composite water-retaining material obtained by the preparation method has the performance of fast absorption of rain and slow release in drought, and also has good anti-rainstorm impact performance, which can effectively avoid being washed away.

The invention discloses a comprehensive evaluation method suitable for a tropical coral sand soil conditioning technology, and the method comprises the steps: constructing a soil-vegetation-environment three-coupling quantitative index system, employing an entropy weight-TOPSIS-gray correlation integration decision algorithm, embedding a tropical coral island hard constraint condition, and combining a dynamic weight award mechanism, and obtaining a tropical coral sand soil conditioning technology. According to the coral sand soil remediation technology evaluation method, the coral sand soil remediation technology scheme of any source is comprehensively evaluated, the method has the advantages of full-objective weighting, quantitative sequencing, robustness verification and directional scene constraint, local material utilization and environment-friendly guidance of coral sand soil remediation are promoted, and meanwhile the overall efficiency and sustainability of coral sand soil remediation technology evaluation are improved.

This invention discloses a method for improving the high-temperature resistance of engineering cement-based composite materials, belonging to the technical field of cement-based composite materials. This invention utilizes coral sand powder to replace quartz powder in engineering cement-based composite materials at a volume substitution rate of 0-50%. By replacing quartz powder in an appropriate amount with coral sand powder, the introduction of coral sand powder helps improve the bonding strength in the interfacial transition zone (ITZ), effectively enhancing the overall performance of the engineering cement-based composite material, especially exhibiting better mechanical properties under high-temperature conditions. Furthermore, when the coral sand powder replacement rate is 25%, the engineering cement-based composite material exhibits good flowability, and the residual compressive strength and axial tensile properties are also the most excellent, with a compressive strength of 60.6 MPa after exposure at 400℃.

The present application relates to a kind of geosynthetic reinforced coral sand filter type seawall structure, including seawall foundation system, seawall facing system and seawall core system;Seawall foundation system includes coral sand fill foundation, geosynthetic bag reinforced crushed stone pile and geosynthetic material reinforced graded crushed stone cushion, geosynthetic bag reinforced crushed stone pile is arranged in coral sand fill foundation, geosynthetic material reinforced graded crushed stone cushion is set in the top of coral sand fill foundation;Seawall facing system includes ecological geotextile bag, concrete block stone subgrade surface layer and gabion;Seawall core system includes backfilling coral sand, twisted metal net and sand bag, twisted metal net is set in backfilling coral sand and is connected with gabion, and the side of backfilling coral sand in sea is provided with sand bag.Compared with prior art, the present application effectively improves the stability of seawall under wind wave load and seismic load, and the multi-level filter measures effectively solve the problem that internal fine particles are prone to loss under long-term wave load.

This invention discloses a method, apparatus, and storage medium for calculating the bearing capacity of coral sand vibratory compaction foundations. The calculation method includes: determining the initial void ratio of the original coral sand on-site; performing multi-stage vibratory compaction on the foundation; testing the void ratio and effective reinforcement depth of the coral sand after vibratory compaction based on the energy of each stage of compaction; determining the energy dissipation coefficient of coral sand particle breakage through drop weight tests; establishing a formula for calculating the ultimate bearing capacity of coral sand to calculate the bearing capacity; and adjusting reinforcement parameters or optimizing load distribution. This calculation method couples the void ratio and particle breakage energy dissipation of coral sand to the bearing capacity calculation formula. On-site load plate measurements show that the bearing capacity calculation results after incorporating the characteristics of coral sand have small errors compared with on-site verification, meeting engineering design requirements and can be directly used in the reinforcement design calculation of coral sand foundations, significantly reducing the deviation of traditional design calculation results. In addition, this method is highly operable, economical, and computationally efficient, making it suitable for deep-sea island and reef engineering design applications.

The invention relates to the field of ecological restoration, in particular to a coastal wetland ecology restoration method. The invention provides a coastal wetland ecology restoration method. The coastal wetland ecology restoration method comprises the following steps that invasive species of a to-be-restored land are removed; laying an ecological restoration matrix; the sea grass is planted in a cluster-strip composite mode, and field planting is conducted; introducing biocenosis in batches every two months; a tide response system and an intelligent monitoring platform are set up to monitor the condition of the to-be-repaired land; the ecological restoration matrix comprises 40% of oyster shells, 40% of coral sand and 20% of bentonite. According to the remediation method provided by the invention, the seaweed bed and the eucheuma are planted at intervals to form an algae-grass barrier, so that the transparency of a water body is effectively improved, and photosynthesis is promoted; the disturbance behavior of benthonic animals such as sea cucumbers enhances the oxygen penetration depth and oxidation-reduction potential (Eh) of sediments and improves the substrate environment; tidal self-adaption is achieved through the gradient buoyancy planting device, and it is guaranteed that sea grass stably grows under different water level conditions.

The application relates to a coral sand island reef sea area water depth detection method, device, equipment and storage medium, first optical remote sensing image data and measured water depth data of a coral sand island reef sea area are acquired, visible light chrominance fusion features of a plurality of positions corresponding to the measured water depth data are acquired based on the first optical remote sensing image data, real water depth data of the plurality of positions and the corresponding visible light chrominance fusion features are combined to construct a training data set, a preset model is trained to obtain a water depth inversion model. In detection, second optical remote sensing image data of a to-be-detected sea area is acquired, visible light chrominance fusion features of a target position are extracted and input into the water depth inversion model, so that accurate water depth data are obtained. The embodiment of the application effectively overcomes many disadvantages of the prior art, and significantly improves the precision and reliability of coral sand island reef sea area water depth detection.

The invention discloses a coral sand vibroflotation consolidation foundation bearing capacity calculation method and device and a storage medium. The calculation method comprises the steps that the initial void ratio of original coral sand is measured on site; performing multi-stage vibroflotation compaction on the foundation; testing the void ratio and the effective reinforcement depth of the coral sand after the coral sand is subjected to vibroflotation after the foundation reinforcement of each stage of vibroflotation energy; determining the crushing energy consumption coefficient of the coral sand particles through a falling weight test; establishing a coral sand ultimate bearing capacity calculation formula to calculate the bearing capacity; reinforcing parameters are adjusted or load distribution points are optimized; according to the calculation method, the void ratio and particle crushing energy consumption of the coral sand are coupled to a bearing capacity calculation formula, field load plate actual measurement shows that the error between the bearing capacity calculation result fused with the coral sand characteristics and field verification is small, the engineering design requirement is met, and the method can be directly applied to reinforcement design calculation of the coral sand foundation; the result deviation of traditional design calculation is obviously reduced; in addition, the method is high in operability, good in economical efficiency, high in calculation efficiency and suitable for deep sea island engineering design application.

The application discloses a method for calculating the pile side friction of a coral reef geological driven pile foundation, comprising the following steps: S1, collecting undisturbed coral sand in the field, breaking the undisturbed coral sand by using an indoor pressure crushing test, and quantifying the particle crushing degree of the undisturbed coral sand into a relative crushing rate; S2, measuring the wet density of the coral sand in the design pile foundation point area range of a construction site, and calculating the relative compactness of the coral sand according to the indoor extreme value density test result of the coral sand; S3, establishing a particle crushing correction formula coupled with the relative crushing rate and a loose filling correction formula coupled with the relative compactness; and S4, correcting the pile side friction calculation model and calculating based on the two correction coefficients. According to the method, the coral sand crushing effect and the compacting effect are quantified into the relative crushing rate and the relative compactness by combining tests, the pile side friction calculation model coupled with the particle crushing correction coefficient and the loose filling correction coefficient is constructed, the method is more in line with the data of the construction site, and the pile foundation construction design can be effectively, reliably and accurately guided.