10 results about "Coral sand" patented technology

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 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.

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 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.

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.

This invention discloses a method for preparing carbon-fixed coral sand artificial soil based on microphase reconstruction, comprising the following steps: pretreating natural coral sand; feeding the pretreated coral sand mixture into a microphase reconstruction device to obtain microphase-reconstructed coral sand slurry; preparing carbon dioxide micro-nano bubble water and injecting it into the microphase-reconstructed coral sand slurry; homogenizing the coral sand slurry in a closed homogenization device and mixing it with a binder to form a binder-coral sand artificial soil slurry; pouring, grouting, or filling the obtained binder-coral sand artificial soil slurry into the target location, performing initial steady-state curing, subsequent carbonization curing, and natural wet curing or closed moist curing, ultimately obtaining carbon-fixed coral sand artificial soil. This invention is beneficial for improving the carbonization efficiency, structural uniformity, density, and engineering construction stability of the material, enhancing its application value in marine geotechnical infrastructure; the resulting artificial soil has a wide range of applications.

This invention discloses a multi-scale modeling and disaster response analysis method and system for island and reef-water-bound structures. The method includes: using a continuous medium model and a linear elastic constitutive model for the reef platform; using a continuous medium model and a Hardin-Drnevich constitutive model for the calcareous coral sand foundation, which is embedded into ABAQUS through a user-defined material subroutine and verified; using a structural equivalent medium model and an unstructured mesh for low-load-bearing areas of the water-bound structure, and a structural solid micro-model and a locally refined mesh for high-load-bearing areas; constructing the interface between the two types of models using a penalty function contact algorithm to form a full-scale three-dimensional model; employing explicit dynamic analysis to simulate the full coupling of seismic waves, reef body, and structure, as well as wave-foundation-structure coupling, outputting island and reef stress, displacement field, structural stress and plastic strain cloud maps, and damage evolution data, thereby achieving structural damage assessment and island and reef topographic evolution prediction. This invention, through multi-scale integrated modeling, achieves collaborative analysis of ultra-large geological bodies and fine structures, providing a reference for island and reef engineering.

The application discloses a double sorting device for the particle size and shape of coral sand particles, which comprises multiple sorting systems, sorting system fixing supports and a screening machine, the sorting system comprises a particle size sorting system, a flaky particle sorting system and a blocky and rod-shaped particle sorting system connected in sequence from top to bottom, is compatible with an existing standard inspection screening machine, has a simple structure, does not need to introduce complex mechanical equipment on the basis of reserving the traditional particle size sorting function, and significantly reduces the equipment modification cost when the screening mesh is ordered as required; and the application further discloses a double screening method for the particle size and shape of coral sand particles, the device can simultaneously screen sample particles in multiple different target particle size ranges, and can respectively perform shape screening on the sample particles in different target particle size ranges, such as flaky, blocky and rod-shaped shape screening, and through optimized screening parameters, the "leakage screening" and "mixed screening" phenomena are effectively avoided.

This invention relates to the field of plant growth regulation technology, and discloses a slow-release regulator for promoting plant growth and its preparation method, comprising the following steps: immersing pretreated coral sand in a hydrothermal ammonium humate solution to obtain a hydrothermal ammonium humate / coral sand complex; crushing and grinding fresh willow branches, soaking them in deionized water, and then separating the solid and liquid to obtain willow branch liquid; immersing hydrothermal carbon in the willow branch liquid to perform an adsorption reaction, adsorbing the natural plant growth hormones in the willow branch liquid to obtain a willow branch liquid / hydrothermal carbon complex; mixing and granulating the hydrothermal ammonium humate / coral sand complex, willow branch liquid / hydrothermal carbon complex, bentonite, sodium alginate, and CaCl2 to obtain the slow-release regulator. This invention combines a coral sand complex loaded with hydrothermal ammonium humate and a hydrothermal carbon complex loaded with willow branch liquid as a slow-release regulator for promoting plant growth, achieving the slow release of hydrothermal humic acid while providing calcium for plant growth.