328 results about "Intertidal zone" patented technology

The invention discloses a seashell digger which is an automatic ship type digging machine widely applicable to digging seashell products such as razor clams, clams and sea cucumbers on intertidal zones of coastal areas. The seashell digger structurally mainly comprises a ship, a driving machine, a crane, a mud filter wheel, a hydro-extracting wheel, a conveyor and the like. The mud filter wheel comprises a mud axle, rowed claws, claw nails and the like, the ship can be pushed to forwardly run under the rotation action of the mud filter wheel, an elbow is further arranged at the tail end of each claw nail of the rowed claws, and working clearance is reserved between the elbows of each two adjacent claw nails, so that seashells can be automatically dug when the mud filter wheel rolls forwardly. The seashell digger has the advantages that the digger is low in manufacturing cost and is effectively adaptive to severe working environments; the seashell digger only needs to mechanically run forwardly, so that the seashells can be quickly, accurately and efficiently dug on a large scale, and the labor intensity of manual operation can be greatly relieved.

The invention discloses a method for increasing the elevation of an intertidal zone to form a suitable land for mangrove forest. The method mainly includes key steps of determining a target elevation; determining land reclamation boundaries; constructing cofferdams; constructing fences; implementing earth filling; flattening filled earth; constructing artificial tidal creeks; realizing temporary fixing measures; and the like. The inventor aims to increase the elevation of the intertidal zone by the aid of engineering means, requirements of mangrove plants on hydrology, sediment and other conditions can be rapidly met, the suitable land for the mangrove forest is formed and created, accordingly, afforestation success rate is increased, coastal ecological safety and sustainable development of China are promoted, and land safety and ecological safety of coastal zones are effectively maintained.

The invention provides a sinonovacula harvesting machine, and belongs to the technical field of fishery machines. The sinonovacula harvesting machine solves the problem that an existing sinonovacula harvesting device is low in efficiency and has dead angles in the harvesting process. The sinonovacula harvesting machine comprises a rack, a driving and steering mechanism and a sinonovacula collecting mechanism, wherein the driving and steering mechanism is used for driving the rack to move forward. The sinonovacula collecting mechanism comprises a support fixedly connected at the front end of the rack. A sinonovacula lifting device which is of an inclined plane shape is arranged at the lower end of the support. A conveying mechanism is further located on the support at the tail end of the sinonovacula lifting device. A sinonovacula frame is arranged at the tail end of the conveying mechanism. A spraying silt-removing device is further arranged at the upper end of the conveying mechanism. According to the sinonovacula harvesting machine, the sinonovacula collecting mechanism is used for scooping up sinonovacula, a conveyer belt is used for conveying the sinonovacula, the spraying silt-removing device is used for removing silt on the sinonovacula in the conveying process, so that the structure is simple in the process of collecting the sinonovacula, and the sinonovacula is clean. The sinonovacula harvesting machine has the advantages of being reasonable in structure, convenient to use, and free of dead angles in the harvesting process, greatly lowers harvesting cost, improves work efficiency, and can simultaneously harvest other shellfishes in intertidal zones and sinonovacula ponds.

The present invention is technological process and apparatus of culturing triploid solitary oyster on the basis of tetraploid oyster parent. The technological process includes breeding parent oyster, obtaining egg and generating triploid, larva culturing, no-adhesion metamorphosis, downward flow culturing, upward flow culturing, outdoor temporary culturing, raft type pruning in intertidal zone and commercial oyster purifying. The present invention combines the triploid technology and solitary oyster culturing technology to breed new oyster variety for large scale production. The triploid solitary oyster has great size, high saccharide content, high quality, good taste, and thus high marketability.

The invention relates to a potting technology for mangrove forest seedling cultivation, which is characterized by comprising the steps of 1) selecting a seedling cultivation field, wherein muddy inning intertidal zones with weak storm, low salinity and fresh water supply are selected; 2) cultivating the seedlings in a nutrition bag, wherein a seedling cultivation matrix is filled in the nutrition bag, and direct seedling cultivation with the nutrition bag is adopted for vivipary mangrove forest plants; 3) transferring the bagged seedlings into pots, wherein plantlet grows up after the seedling is cultivated for 0.5-1 year in bags according to the method of step 2, and then the plantlet is transplanted to a plastic seedling cultivation pot for seedling cultivation; 4) cultivating the potted seedling, wherein the seedling cultivation is carried out after the plantlet is transplanted into the plastic cultivation pot and arranged in a nursery garden, and water and fertilizer management, reshaping and trimming as well as pest control are strengthened in the seeding cultivation process; and 5) outplanting of the seedling, wherein the mangrove forest seedling is cultivated after the plantlet transplanted in step 4) grow for 1-2 years in the plastic seedling cultivation pot. At the time, the seedlings can be transferred out of the nursery garden to be used for recovery of the mangrove forest of the inshore intertidal zone and greening of the coastal intertidal zone. The seedlings cultivated by the technology disclosed by the invention has the characteristics of being high in degree of lignification of the stem, complete and dense in roots and the like; and compared with plantlets of the mangrove forest, the seedlings have stronger adaptive capacity to hard intertidal zones and severe growing environments.

The invention relates to a pile sinking method for driving a large-diameter steel pipe pile in an intertidal zone. The method is characterized in that: a ship special for large-diameter steel pipe pile transportation and auxiliary pile hoisting construction is matched with a full rotary hoisting ship to realize the large-diameter steel pipe pile sinking operation as the following steps of: machining the steel pipe pile and hoisting the steel pipe pile to the special ship; positioning the hoisting ship; arranging a tilt sensor at the top of the steel pipe pile; vertically hoisting the steel pipe pile; automatically sinking the vertical steel pipe pile into the mud; hoisting a steel wire rope to automatically throw off a hook; recording the vertical reading of the steel pipe pile; and hammering the sunken pile by using a hydraulic hammer. The method has the advantages that: the ship special for large-diameter steel pipe pile transportation and auxiliary pile hoisting construction is matched with the full rotary hoisting ship to realize the large-diameter steel pipe pile sinking operation, so that the steel pipe pile of 300 to 600 tons can be easily hoisted and turned over in the air, the requirement for the maximum hoisting weight of the hoisting ship is reduced, hoisting safety and convenience are ensured and the engineering cost is greatly saved.

The invention relates to a yawing sector management and optimized control system and a yawing sector management and optimized control method for a wind generating set. The system comprises a yawing sector position detection module, a section control strategy module and a control mode switching module. The method comprises the following steps of: dividing all space swept by the yawing of the wind generating set into sectors; designing running and control algorithms according to wind energy characteristics of the sectors; detecting the current wind facing position of an impeller of a wind turbine in real time and determining a sector which the wind turbine enters currently; and switching to a corresponding running and control algorithm according to the entered sector, and outputting a control signal for control according to a result. The invention is applied to modern horizontal axis wind generating sets, and can improve the running conditions of sets in wind fields with complicated topographic conditions, reduce running load, optimize the control effect of wind turbines in wind fields in intertidal zones, and improve the wind energy utilization efficiency.

The invention discloses a method of intertidal zone wind power for accessing a power grid. The method comprises the following steps: step 1, determining an influence factor set; step 2, evaluating the power grid state; step 3, dividing the planning area into supply districts which are of different layers, connected but independent; step 4, carrying out load prediction, and performing load characteristic analysis and prediction with some emphasis; step 5, formulating a transformer substation layout and a wire frame scheme; step 6, analyzing wind power consumption capacity in the planning area and each supply district; step 7, determining wind power integration mode of the intertidal zone wind power access applicable for each power supply district; step 8, carrying out scheme optimization; step 9, providing the final suggestion. By virtue of the method, in the power grid planning phase, the wind power resource characteristics and the power grid operation requirements can be both considered about to realize that the total investment cost for power grid construction is optimized.

The invention discloses a descending bracket self-mobile model framework bridge fabrication machine, and relates to a bridge fabrication machine. A middle lifting point cross beam takes place and finishes primary blanking together with a C beam and a traveling trolley system, so that conversion of a stressing system from the lower part to the upper part is realized. The front end of a nose bridge is driven by a front supporting cross beam system to be jacked in place. A bracket is driven by the traveling trolley system to move out transversely, move longitudinally to travel and move transversely to take place. The middle lifting point cross beam and the C beam together finish secondary blanking, a middle lifting point cross beam lifting rod is removed, the mobile die framework moves transversely to open, moves longitudinally to travel, moves transversely to close and jacks in place, and the C beam 7 is removed; and finally concrete is poured. Thus, through stressing system conversion of the bracket, the traveling trolley system, the middle lifting point cross beam and the C beam, the use at construction sites of continuous beams at sites of intertidal zones, canyons, urban viaducts, river-crossing bridges and cross-sea bridges with limited construction conditions and high construction difficulty, where the auxiliary hoisting equipment cannot reach, can be realized.

The invention discloses a microbial preparation for improving an aquatic product culture environment and a preparation method thereof. A strain with optimal nitrite degradation effects is screened and separated from a mud sample in Tongan and Haicang ports of Xiamen city of the Fujian province, another strain with optimal nitrite degradation effects is screened and separated from a mud sample in the intertidal zone of Ningde city of the Fujian province, and the two strains respectively are Rhodopseudomonas palustris PSB20 and Bacillus subtilis ND04. The microbial preparation prepared from the two strains can degrade ammonia nitrogen and nitrous acid in an aquatic product culture environment, has good decomposition effects on residual bait organic matters, has a certain effect of inhibiting pathogenic vibrio bacterium growth in culture water, and has a good production application prospect. The microbial preparation has the characteristic of simple preparation processes.

The invention discloses a bottom-supported floating pile-driving platform, which includes a caisson, a support device, an operating platform, a pile gripper and a crane. Inside the caisson are arranged a ballast tank and a water feeding / discharging system for controlling water feeding / discharging of the ballast tank; the support device is installed on the caisson, and supports the operating platform; the pile gripper is installed on the operating platform and used for positioning a pile body; the crane is used for hoisting the pile body and a pile hammer; the ballast water amount of the ballast tank in a sailing state is smaller than the ballast water amount of the ballast tank in a pile driving state; and the caisson floats on water in the sailing state, but comes into contact with the underwater ground in the pile driving state. With the caisson, the inventive bottom-supported floating pile-driving platform can adapt to pile foundation construction in shallow water areas such as intertidal zone and shallow sea area. As the caisson is always stably supported on the underwater ground in the process of pile driving, the pile foundation construction safety is not affected even in case of tide ebbing and stranding.

The invention relates to seaweed bed restoration and reconstruction techniques, in particular to a simple and convenient zostera marina L. seaweed bed ecological restoration system, which comprises: fixing zostera marina L. on stones of proper sizes by thin ropes; and performing zostera marina L. cultivation and seaweed bed ecological restoration in a proper sea area, wherein the cultivation density of the zostera marina L. is 300 to 500 plants per square meter. When the method is used, the problem that the high water power of an intertidal zone affects the cultivation and survival of seaweeds and the problem that it is difficult to transplant seaweed in the sea area in a subtidal zone are solved, and the restoration or reconstruction of the zostera marina L. seaweed beds in the intertidal zone and the subtidal zone can be performed conveniently and quickly by combining with the simple, convenient and effective zostera marina L. transplanting method provided by the invention. In addition, the materials used in the invention avoid polluting the sea areas.

The invention relates to a curing agent for curing / stabilizing silt (sludge) and soft foundation, and the application thereof. The curing agent comprises 5-10 parts of cement clinker, 10-20 parts of aluminium hydroxide, 10-15 parts of quick lime, 1-5 parts of anhydrous gypsum, 50-60 parts of special rock ballast powder, 5-10 parts of sodium silicate, 0.1-3 parts of sodium fluosilicate, 1-3 parts of anionic polyacrylamide, 0.5-1.5 parts of sodium dodecyl benzene sulfonate and 0.3-1.0 part of carrageenan concentration powder; and the curing agent prepared by the components has the pH value of 8-9 and the particle size of 0.005-0.15mm. 5-10% of curing agent is evenly mixed with silt (sludge), and after treatment, the compression strength reaches 0.2-0.4Mpa and the compression strength of seven days reaches 0.9-1.85Mpa, so that the curing agent has the characteristics of excellent waterproof property, water stability and hydraulicity, and can be widely applied to the curing process for a sea reclamation intertidal zone, the curing process for the sludge generated by riverway dredging, the curing and stabilizing treatment for the sludge generated in a sewage treatment plant, the strengthening for the soil of a road soft foundation layer, and the leakage-proof treatment for a mud layer at the bottom of water in a river and a lake.

The invention relates to an intertidal zone habitat survey method based on unmanned aerial vehicle aerial photography. The method comprises the steps that an unmanned aerial vehicle low-altitude aircraft is adopted as a remote sensing platform, needs to carry a digital camera, and integrates a GPS and a gyroscope module; a tidal table of a surveyed intertidal zone region is inquired; executable time periods of unmanned aerial vehicle aerial photography are determined according to high and low tide levels and tide time of a spring tide period; flight numbers and air lines of the aerial photography and control points needing to be arranged are planned; arrangement of the control points, measurement and aerial flight photography are completed; aerial photography images are processed, exposure adjusting, image splicing and geometric correcting are involved in processing, and therefore a high-resolution image of the whole survey range can be formed; speckle extracting and spatial formation ecological parameter calculating are carried out on specific type of the intertidal zone habitat. The method overcomes the defect of an existing intertidal biology survey method or a traditional topographic survey method, obtains spatial framework information of the intertidal habitat, and provides the basis for evaluating the ecological function and the ecological value of the inter-tidal habitat.

The invention discloses a construction process for leveling and grouting an intertidal zone polygonal bracket fan foundation. The construction process comprises the following steps of: sinking a foundation pile body into water; measuring the elevation of top faces of a plurality of foundation pile brackets; placing gaskets on the plurality of foundation pile brackets according to the elevation deviation of the top faces of the foundation pile brackets, and pre-leveling; sleeving a jacket casing outside the foundation pile body; and measuring the deviation of a flange level on the jacket casing, performing no regulation if the deviation is within 2mm, and placing a jack on the top face of the foundation pile body to jack the jacket casing so as to regulate the flange level to be within 2mm if the deviation exceeds 2mm. The construction process for leveling and grouting the intertidal zone polygonal bracket fan foundation, disclosed by the invention, has the following beneficial effects of realizing on high-precision leveling and grouting of an intertidal zone, greatly reducing the construction cost and reducing the cost on a single platform.

The invention discloses a construction process for a single-pile wind turbine foundation in an intertidal zone, which comprises the following steps of: hauling a locating ship, a transporting ship and a craning ship to an appointed place during high tide; anchoring and locating the craning ship; horizontally hoisting a foundation pile; staking the foundation pile; loading the foundation pile into a pile clamping device; adjusting the verticality of the foundation pile; naturally sinking the foundation pile; examining the verticality, wherein if the verticality does not meet the requirements, the natural sinking of the foundation pile is carried out again; releasing a hoisting point; hoisting a pile hammer and a pressure hammer; starting a hydraulic impact hammer power system; hammering with an impact hammer; examining the verticality, wherein if the verticality does not meet the requirements, the hammering of the impact hammer is adjusted; sinking the pile by impact; measuring an elevation and a penetration degree, wherein if the elevation and the penetration degree do not meet the requirements, the step of sinking the pile by impact is adjusted; stopping the hammer; and demounting the craning ship. The invention has the following advantages of solving the problems of short effective operation time and low construction work efficiency for the wind turbine foundation construction in the intertidal zone, and greatly reducing construction cost.

The invention discloses a special rice fertilizer with both soil improvement and fertilizer efficiency functions for coastal saline soil and a preparation method and application of the special rice fertilizer. The special rice fertilizer comprises the following components in parts by mass: 35-40 parts of humic acid, 15-20 parts of fulvic acid, 20-25 parts of a composite fertilizer, 15-20 parts of a silicon calcium fertilizer, 1-1.5 parts of a urease inhibitor and 1-1.5 parts of a nitrification inhibitor. According to the invention, the application method combines soil culture, root system activation, crop nourishment and fertilizer efficiency improvement, so the rice fertilizer is low in cost, stable in effect, applicable to mechanical operation, not only applicable to coastal intertidal zones, but also applicable to rice planting in saline-alkali soil in north China or even northwest inland.

The invention discloses a method of extracting a sandy coastline by using multiple periods of remote sensing images. The method comprises the following steps: 1, pretreatment is carried out on remote sensing images acquired via a satellite; 2, an NDWI image is acquired; 3, a binary image with land and water segmentation is acquired; 4, an instantaneous water line is acquired: a raster-vector conversion method is used for converting the binary image into vector data, and through porphyroclast elimination, surface-to-line treatment and false boundary elimination, the instantaneous water line is obtained; 5, tide correction is carried out on the instantaneous water line; and 6, through fusion of multiple periods of corrected water lines, the sandy coastline is acquired. The instantaneous water line is extracted by using the multiple periods of remote sensing images, influences on the coastline position by the tide are also considered, upper lines of multiple water lines through tide correction are fused into an accurate sandy coastline, the coastline extraction process is quick, accurate and fully automatic, and position underestimation of the extracted coastline caused by intertidal zone topografic relief can be effectively avoided.

The invention relates to a method for culturing a Stichopus japonicus seed, which belongs to the technical field of a Stichopus japonicus seed culturing method and comprises the following steps of (1) fishing and catching; (2) screening; (3) transporting and (4) culturing the Stichopus japonicus seed. According to the method for culturing the Stichopus japonicus seed disclosed by the invention, the culturing process is easy to operate, the Stichopus japonicus seed is scientifically selected and fished and caught in advance; the Stichopus japonicus seed can be matured in advance and lay eggs by utilizing the method of indoor heating and accelerating, thus, large-scale seeds can be cultured in the same year, and the produced Stichopus japonicus seed has enhanced hereditary capacity, strong resistance and good property; moreover, as the feed of the Stichopus japonicus seed and the water temperature and the water quality in the Stichopus japonicus culturing pond are strictly controlled, the fecundity of the Stichopus japonicus is better than that of the Stichopus japonicus cultured in the pond and the intertidal zone, thus, the laid eggs have good quality and the distortion ratio at each stage is high.

The invention discloses stabilized soil applicable to an intertidal zone sludge stable layer. The stabilized soil comprises a component A and a component B, wherein the component A is a curing agent; the component B is a mixture of tailing sand and sludge; the component A comprises the following components in percent by weight: 30%-50% of mineral powder, 20%-40% of cement, 10%-12% of coal ashes, 10%-15% of lime and 3%-5% of gypsum; and a mass ratio of the tailing sand to the sludge in the component B is (0.2-1):1. According to the composition of the stabilized soil, 50kg-500kg of the component A is uniformly doped in per cubic meter of the component B. The stabilized soil disclosed by the invention is simple, scientific and reasonable in composition; most of material components are industrial solid waste tailing sand, as well as slag, coal ash, and the like, so that the national environmental protection policy is satisfied, and therefore, wastes are treated with processes of wastes against one another and the stabilized soil of the stable layer is high in compressive strength and excellent in water stability.

The invention discloses a method for surveying terrain of danger areas in an intertidal zone. According to the method, an unmanned plane low-altitude digital remote sensing system quickly obtains large scale true color aerial images, and in combination with tidal level observation data, a high-precision land and water boundary can be drawn after correction of office work, a contour line is obtained, and sequentially, measurement of high beach high-altitude terrain is realized. The method comprises the steps of field treatment and office work treatment. In comparison with the prior art, the unmanned plane low-altitude digital remote sensing system disclosed by the invention has special advantages unmatched by other remote sensing measures, the unmanned plane aerial photography system has the characteristics of being simple in structure, low in use cost, quick in response and easy to transfer, meanwhile, can flexibly and quickly obtain high-resolution, large-scale and highly up-to-date images.

The invention discloses a long-distance intertidal zone submarine cable landing laying construction method and a system, and relates to a submarine cable landing laying method and a system; for the traditional laying method is very difficult, the laying speed is slow, the frictional resistance along the way is big, and method is easy to cause damage of a cable body and a cable traction head. The method includes steps that a submarine cable crosses through a cable guide frame on a submarine cable ship, and a wire rope at the front end is pulled to a winching machine; the winching machine is operated to pull the wire rope, thus the submarine cable is discharged; the discharged submarine cable is placed in the middle of a floating tire frame, and the lower part of the floating tier frame is suspended in the water; the front end of the submarine cable crosses through a cable distributor, is pulled and clamped by the cable distributor; after the submarine cable passes through the first cable distributor, the wire rope at the front end of the submarine cable is pulled to the next winching machine along the cable guiding device, and then pulled by the next winching machine; the submarine cable passes through a submarine cable scaffold buffer platform and then discharges forwards along the cable guiding device; the same operation as above is carried out until a transformer substation. The technical scheme is simple in method and fast in laying speed.

A saline soil conditioner for coastal intertidal zone and application thereof. The conditioner comprises, by mass ratio, 2-6 parts of an organic fertilizer, 0-0.45 part of humic acid, 0.005-0.015 part of a trace additive composition, 0.025 part of urea, and 0.050 part of diammonium phosphate. The trace additive composition comprises 60% of polyacrylamide, 30% of ''732'' type cation exchange resin, 5% of cytokinin and 5% of auxin. The soil conditioner can enhance land productivity, improve soil, increase soil aggregate, increase soil biological activity, reduce soil salinity, and promote plant growth in saline-alkali soil.

The present invention relates to a method for making intertidal sponge undergo the process of artificial cultivation under the laboratory condition to obtain biomass. Said method includes the following steps: collecting sponge in intertidal zone, cleaning impurity and dirts from sponge surface in laboratory, cutting sponge into small blocks, making temporary culture in culture vessel, then fixing the small block sponge on the carrier, placing it into a culture device to make temperature-controlled photophobic culture, adding bait algae as main body food, making culture for 10-20 days, so that the biomass maxmum value of primary sponge growth can be obtained.

The invention provides a seedling propagation and cultivation method for a mangrove plant, heritiera littoralis. The seedling propagation and cultivation method comprises the following steps: step A, selecting plants of 5-20 year heritiera littoralis having no plant diseases and insect pests as mother trees, collecting fruits with plump forms and blue-dun peelings from August to October per year, disinfecting, sun drying and bagging; step B, storing the fruits into sand; step C, selecting a nursery field, disinfecting seedbed substrate, and 10 to 15 days later, carrying out direct sowing to the fruits of heritiera littoralis; step D, carrying out acclimatization to the seedlings of heritiera littoralis so as to adapt to halophytic environment and fresh water environment; step E, after the seedlings of heritiera littoralis grow to 0.8 to 1.5m, carrying out earth removing and transplanting and then placing the seedlings into bottoms of planting holes waiting for planting, and using seaside natural marine mud for strong seedlings. The seedling propagation and cultivation method provided by the invention expands the survival adaptation range of the seedlings of the heritiera littoralis, the seedlings cultivated not only can be planted in a intertidal zone environment where sea water can reach directly, but also can be cultivated in land far away from sea water, so that forestation and propagation of the heritiera littoralis are facilitated, and the seedling propagation and cultivation method is suitable for protection and production to heritiera littoralis resource, and is also is suitable for landscape application.

The invention relates to a reed harvesting boat comprising a boat body and a boat body propulsion unit. Particularly, the reed harvesting boat further comprises a reed harvesting device, a reed smashing and compressed bundling device and a storing device arranged on the boat body sequentially from a prow to a stern, the reed harvesting device comprises a harvesting frame, a cutting device, reed dividing and supporting devices and a harvesting conveying belt, the upper portion of the harvesting frame is connected with the front side of the prow, the cutting device is arranged on the lower portion of the cutting frame, the reed dividing and supporting devices are arranged on two sides of the harvesting frame, and the harvesting conveying belt is used for conveying harvested reeds to the reed smashing and compressed bundling device. The reed harvesting boat is particularly suitable for harvesting reeds in intertidal zones and shallow waters on the wet lands, high in harvesting efficiency, and capable of completing integrated operations of harvesting, conveying, bundling, piling and transferring.

Piling construction equipment for the large steel pipe piles of a seaborn intertidal zone wind power station relates to the civil construction project industry of the construction industry, and consists of a guide frame (1), a crawler crane (2), a boat body (3), two tail regulation water tanks (4), two No. 2 ballast tanks (5), an oil bunker (6-1), a freshwater tank (6-2), two No.1 ballast tanks (7), two head regulation water tanks (8), a main deck (9), a deck A (10) and a deck B (11); and a shallow draft operation boat which is specially designed and satisfies the intertidal zone construction is adopted to reconstruct, is provided with a special pile sinking guide frame, a global positioning system (GPS), large hoisting equipment and a large hydraulic vibration hammer to carry out the pile sinking operation, so the problem of the large steel pipe piles of the intertidal zone construction is solved, and the construction safety problem of the stranding state of the piling boat is solved at the same time.

The invention discloses an assembly construction process of a prefabricated 40m T-beam in an intertidal zone of an open sea. The intertidal zone is a critical construction region of a coastal construction, and is a construction which does not adapt to water or land construction process; and construction of the intertidal zone is a technical problem at home and abroad. The process comprises the following steps: a prestress T beam is shipped to the construction field after the 40m prestress T beam is prefabricated by a post-tensioning method; the T beam is hoisted to a beam transporting trolley through a cross-mound gantry crane on a switching platform, and transported to the erection field by the beam transporting trolley, and is spanned to a designated position through a bridge girder erection machine. The particular assembly sequence is that the beams are spanned from the sea side to the coach side, and the erection sequence of each T beam is side, center, side and center. According to the assembly construction process, the typical intertidal zone construction problems that prefabricated T beams are adopted in the upper structure of an approach bridge with a designed length of over 3km and bent spacing of 40m, the single T beam with maximum weight of over 180 tons is positioned between high and low tide levels of a spring tide and is submerged and exposed along with tiding can be solved successfully.

The invention relates to wind power generation equipment and discloses a cabin dehumidificating and desalting micro positive pressure system of a wind generating set at sea and in an intertidal zone. The system is characterized in that a dehumidification and filtration device is arranged on an appointed air inlet in a cabin; the other gap part except the appointed air inlet in the cabin is relatively sealed or is independent from an air passage way in the cabin, thus forming a relative sealed space; the air entering into the cabin from the appointed air inlet is subjected to dehumidification and filtration of particles with certain diameter; and through humidity, salt mist and flow control, the dehumidificated and desalted air which is relative dry and pure is filled into the whole cabin, thus forming a micro positive pressure, thereby ensuring the parts in the cabin to work in an environment similar to the land air environment and maximumly reducing the corrosion on the parts caused by the moist and salt fog at sea. In terms of the whole antiseptic system, only the local structure is improved, the system provided by the invention has the advantages of low cost, simplicity for implementation, high reliability, low technical requirement on the equipment and easiness for maintenance.