87 results about "Tidal water" patented technology

The utility model discloses a coastal wetland shallow underground environment monitoring device, which belongs to the field of coastal wetland environment research and comprises an outer shell, a sealing cover A is arranged at the upper end of the outer shell, a sealing flange is arranged at the lower end of the outer shell, and a sensor mounting seat is arranged on the sealing flange. A plurality of water quality sensors for collecting water quality data are mounted on the sensor mounting seat, a battery and a control circuit board are arranged in the outer shell, and the battery and the plurality of water quality sensors are electrically connected with the control circuit board. According to the utility model, the sensor is buried underground by using the monitoring vertical pipe structure, and the influence of tidal water on a monitored target water source can be effectively isolated by means of the floating ventilation structure, so that the monitoring result is more accurate.

This invention discloses an in-situ observation method and device for tidal flat sedimentary bedding, belonging to the field of tidal flat geomorphological sedimentary observation technology. The observation method includes: laying settlement plates on the tidal flat surface at the in-situ observation location of tidal flat sedimentary bedding; and laying new settlement plates on the sediment of the previous settlement plate at intervals based on the ebb and flow of the tide. After reaching a preset number of settlement plates, collecting the sediment on each settlement plate during low tide and retrieving the settlement plates; and quantitatively analyzing the bedding data and bedding characteristic indicators of the sediment on each settlement plate. The observation device includes a support frame with a timing control unit. The timing control unit includes a holder and a controller. The holder holds multiple layers of settlement plates, and the holder releases the settlement plates one by one according to the interval and the number of releases. This method can obtain the morphological characteristics of tidal flat sedimentary bedding under tidal conditions, providing strong support for the study of the formation process and carbon sequestration mechanism of tidal flat sedimentary bedding.

The invention relates to the technical field of foundation and foundation engineering construction, and discloses a hole wall stability dynamic control system in the tidal formation drilling process, and the system comprises a multi-source dynamic sensing module which is used for obtaining the multi-dimensional data of the drilling pressure, the tidal water level, the displacement of the soil layer around the hole and the like in real time; the data processing and intelligent decision-making module is used for receiving the sensing data and carrying out analysis and prediction through a built-in dynamic mapping and self-calibration model so as to generate a prospective hole wall stability control instruction; and the cooperative control and planning execution module is used for receiving the control instruction and analyzing the control instruction into a cooperative adjustment action on wall protection and drilling parameters, so that accurate and closed-loop dynamic control is executed on the stability of the hole wall. According to the method, through multi-source sensing, self-calibration model prediction and collaborative planning control, prospective and self-adaptive fine adjustment of the hole wall stability is achieved, and the drilling safety is improved.

The utility model discloses tide type water and fertilizer irrigation equipment which comprises a water and fertilizer box and a placement frame, a placing rack is fixedly mounted at the top end of the water-fertilizer box, a culture pot is mounted at the top end of the placing rack, a second water storage cylinder is mounted on one side of the top end of the placing rack, and a return pipe is mounted in the second water storage cylinder. By arranging the tidal structure, when water and fertilizer irrigation is carried out, water and fertilizer can be injected into the culture pot through cooperation of the water pump, the water inlet pipe and the first water storage cylinder, and when the water and fertilizer in the culture pot reach a certain height, the water and fertilizer in the culture pot flow into the water and fertilizer box through the backflow pipe according to the siphon principle; the work is cyclically repeated, so that the irrigation effect is better; furthermore, a circulation mode is adopted for tidal irrigation, the utilization rate of water and fertilizer is high and can reach 90% or above, waste of the water and the fertilizer is reduced, the nutrient solution evenly rises from the bottom of the culture pot and infiltrates the root system of the plant, irrigation is quite even, a large amount of manpower is saved, and irrigation is more convenient.

The application discloses a tidal flow artificial wetland tail water sediment secondary degradation device and a use method, and belongs to the technical field of tidal flow wetland sediment treatment. The device comprises a rigid support and a rotating motor. The top of the rigid support is supported by a rigid supporting plate, and a tail end plate is installed on the rigid supporting plate. A plurality of telescopic mechanisms are installed on the rigid supporting plate. The rotating motor is suitable for driving the plurality of telescopic mechanisms to extend and retract. The output end of the plurality of telescopic mechanisms is provided with a scraper, and the scraper moves on the rigid supporting plate. The rigid supporting plate is arranged to be inclined, and a mounting notched plate is arranged on the side away from the tail end plate. The device further comprises a stirring motor, which is installed in the mounting notched plate. The bottom of the stirring motor is provided with a slurry conveying part, which pumps the stirred slurry to the surface of the wetland soil layer. The application can ensure that the urban tail water can be fully degraded twice by stirring or depositing the mixture in the tidal water flow during the rising tide and the falling tide of the tidal flow artificial wetland, and then conveying the mixture back to the wetland.

The invention discloses an efficient dredging device in an underwater limited space and a construction method of the efficient dredging device, and belongs to the technical field of underwater sludge cleaning. The desilting device comprises a vertical steel frame, a horizontal cross arm, RTK measuring equipment, a bottom device, a water suction opening, a flushing opening, a balancing weight, a molten steel pipe, a transparent rubber steel wire hose and a foam buoy. Wherein the vertical steel frame is horizontally welded with the horizontal cross brace; the bottom device is welded to the bottom of the vertical steel frame, a water suction opening is formed in the top of the bottom device, and a water suction opening and a water outlet are correspondingly formed in the bottom. According to the method, channel steel, steel pipes, steel plates, slurry pumps, RTK measuring equipment and other conventional materials and equipment are adopted, the desilting construction conditions of the underwater limited space can be met, construction is not affected by tide fluctuation, wind power and other natural factors, the construction period can be shortened, the underwater desilting quality can be guaranteed, an original revetment cannot be damaged in the construction process, and the construction period is shortened. And the overall construction cost is greatly reduced.

The present invention relates to the technical field of fish survey in tidal creeks. Disclosed are a survey and sampling floating platform and quantitative evaluation method for fish in a tidal creek during flood and ebb tides. The floating platform comprises a floating platform frame and survey and sampling nets, wherein each survey and sampling net comprises a net mouth welded by a galvanized pipe. In the present invention, by means of the provided floating platform, corresponding sampling fishing nets are respectively lowered for collection during flood and ebb tides, and flow meter data is read to calculate tidal water volume flow, such that aquatic organisms and nutrients in the tidal creek during the flood and ebb tides can be comprehensively collected, the deficiency of related data collection during flood tides in existing research is made up for, accurate monitoring and quantitative evaluation of tidal creek organisms and substance transfer are achieved, and the types, quantities and distributions of tidal creek organisms during the flood and ebb tides, and changes in tidal water flow can be comprehensively understood, thereby deeply understanding the situations of tidal creek organisms and substance transfer, and providing important data support and decision-making basis for related research and ecological protection.

The invention discloses an ecological restoration method for a bird habitat in a waste salt pan, which belongs to the technical field of ecological restoration and comprises the steps of arranging a shoal area, arranging a shallow water area and a light beach, arranging a circulation channel and building a concave polder embankment to control the water inlet and outlet speed of the salt pan. A shallow water area and a light beach are constructed in the waste salt pan to form a salt pan shoal habitat, and a water system network is formed in each shoal area space through a shallow ditch; the waste salt pan repaired by the method provides a rest and foraging place for waterfowls; along with the periodical change of the rising and falling tide water level of the salt pan, a sustainable waterfowl habitat for maintaining dynamic balance among benthic organisms, waterfowls and planktons is formed, and the restoration of the natural ecology of the waste salt pan and the restoration of biological diversity are accelerated; later-stage maintenance is easy, manual weeding and natural bait feeding are not needed, water level control is simple and convenient, cost is saved, and excessive funds and manpower do not need to be input.

The invention provides a high-pile wharf cast-in-place beam construction method and jig frame based on reinforcing steel bar component. The construction method comprises the steps that actual position data of the pile top of a steel pipe pile are collected; the actual position data of the pile tops of the steel pipe piles are compared with the theoretical position data, and the plane deviation and the elevation deviation of the pile top of each steel pipe pile are calculated; according to the plane deviation of the pile top of each steel pipe pile, the bending parameter and the correction length of the main reinforcements of the cross beam component reinforcements corresponding to the steel pipe pile are calculated, so that the reserved holes of the cross beam component reinforcements are aligned to the steel pipe piles, and the lap joint length of the main reinforcements of every two adjacent cross beam component reinforcements meets the requirement; component steel bars are manufactured through the steel bar binding jig frame; a bottom formwork is installed on the steel pipe pile, component steel bars are placed on the bottom formwork, and remaining steel bars are bound; installing a side template; and concrete is poured, and the formwork is dismantled. According to the method, the overwater operation time is greatly shortened, the limitation of tide water on the construction time is effectively avoided, and the construction efficiency is remarkably improved.

The invention provides a fish and vegetable symbiotic intelligent system which comprises three-level linkage units, namely an aquaculture area, a nitrifying bacteria cultivation area and a tidal water culture planting area, and each area is provided with an independent function module and is integrated with a central control unit. The data monitoring center is connected with the aquaculture area function module through an industrial bus and issues an environment regulation and control instruction. The aquaculture area central control unit drives an underwater air injection device to adjust dissolved oxygen based on the instruction, and a nitrification instruction is generated and sent to the nitrifying bacterium cultivation area. After receiving the instruction, the nitrifying bacteria cultivation area controls the flow speed and temperature of a circulating sprayer, generates an irrigation instruction and sends the irrigation instruction to the tidal water culture planting area. The central control unit of the tidal hydroponic planting area controls an overflow siphon according to the irrigation instruction, and tidal irrigation is achieved by connecting a water level sensor. According to the system, efficient collaborative operation of aquaculture, nitrobacterium cultivation and tidal water culture planting can be achieved, and the automation degree, the resource utilization efficiency and the operation stability of the system are improved.

The invention relates to the technical field of wetland purification, and discloses a modularized composite wetland system capable of adjusting hydrodynamic conditions and a use method. The composite wetland system comprises a peripheral frame body assembly which is divided into a water inlet area, an underflow wetland area and a water outlet area which are communicated in sequence; the undercurrent wet area comprises a plurality of filler boxes, flow guide pieces and connecting pieces, the filler boxes are arranged in an array mode, the connecting pieces are arranged at the corners of the filler boxes, and the flow guide pieces are arranged between any two adjacent connecting pieces; the composite wetland system has a flow pushing and water distributing working state, a partitioned flow pushing and water distributing working state, a tide type water distributing working state, a labyrinth type water distributing working state, a local maintenance working state and a composite working state. The modularized prefabricated parts are adopted, the construction period is short when the prefabricated parts are arranged on site, and economic benefits are improved. When the purification effect becomes poor or is blocked in the long-term operation of the composite wetland system, the hydrodynamic condition can be adjusted, the purification capacity of the composite wetland system is improved, and the operation cost is low.

The utility model discloses a suspension type mobile platform for installing a beam bottom overhaul track, and solves the problem that the existing mobile platform is high in safety risk. Comprising a maintenance track and an electromechanical platform, the position of the electromechanical platform is adjusted along the track, the maintenance track is fixed to the beam bottom and provides guidance for the electromechanical platform, and the electromechanical platform comprises a truss structure, a walking structure, a locking structure and a stopping structure; wherein the maintenance track walks on the installed maintenance track through the walking structure, the locking structure is used for position locking, and the stop structure is arranged to prevent the moving platform from sliding out of the track; by using the device, the cantilever of the maintenance track at the bottom of the beam is installed, the investment of hoisting equipment and temporary supports is reduced, the safety risk is reduced, and the problem of installation of the maintenance track under special working conditions such as a deep gorge, a high clearance bridge or a tidal water area is solved.

The invention discloses a multi-source surveying and mapping data dynamic three-dimensional visualization system and method based on digital twinning. The system comprises a multi-source data acquisition and fusion module, a hydrological dynamic prediction model module, a digital twin engine module, a dynamic visualization and interactive deduction module, an early warning module, a model self-calibration and inversion module and a data storage and management module. According to the method, the land and water integrated high-precision three-dimensional model is constructed, and the sputtering height and length of the tidal water to the coastal area are quantitatively predicted by using the special sputtering prediction sub-model, so that accurate dangerous area automatic demarcation and active early warning are realized. A closed-loop self-calibration mechanism is introduced, and model deviation caused by river bed terrain and river surface obstacle changes is intelligently diagnosed and updated by comparing actually measured and predicted sputtering data and adopting inversion analysis methods such as a genetic algorithm, so that the prediction precision is continuously improved, and internal changes of a river channel are visually revealed; and deep decision support is provided for hydrological management and public safety.

The application discloses a kind of tidal creek fluctuation tidal fish investigation sampling floating platform and quantitative evaluation method, it is related to tidal creek fish investigation technical field, floating platform includes floating platform frame and investigation sampling net, investigation sampling net includes by galvanized pipe welding net mouth.The floating platform of the present application is set down corresponding fishing net to collect respectively when rising tide and ebb tide, and reads the flowmeter data to calculate tidal water flow, can comprehensively collect aquatic organism and nutrient in tidal creek when rising tide and ebb tide, make up the deficiency of relevant data collection when rising tide of existing research, realize the accurate monitoring and quantitative evaluation of tidal creek biology and material transport, can comprehensively understand the species, quantity and distribution of tidal creek biology when rising tide and ebb tide, and the change of tidal flow, to understand the situation of tidal creek biology and material transport in depth, provide important data support and decision basis for relevant research and ecological protection.

The utility model provides an adjustable tidal water area ecological bank protection module and a bank protection structure, and relates to the technical field of hydraulic engineering, the adjustable tidal water area ecological bank protection module comprises a bank protection module body and hemp ropes, an accommodating space is arranged in the bank protection module body, and fillers are arranged in the accommodating space; matrix-shaped through holes are formed in the outer surface of the bank protection module body and used for communicating the containing space with the outside. The hemp ropes are connected with the corresponding through holes so as to be used for connecting the adjacent bank protection module bodies, and latticed structures are woven on the corresponding outer surfaces. The technical problems that in the prior art, in a tidal water area, due to changes of the water level and the salinity, the revetment module cannot adapt to water flow impact and erosion, detachable use cannot be achieved, and the ecological compatibility is poor are solved.

The utility model belongs to the field of determination of wetland soil parameters, and particularly relates to a device suitable for coastal wetland soil respiration measurement, in particular to in-situ measurement equipment, which can be used for measuring the respiration of the coastal wetland soil without hindering the release effect of tidal water fluctuation on carbon dioxide in the coastal wetland soil. The interference of accumulated water in the breathing ring on a soil breathing measurement result after ebb tide is prevented. The device comprises a sealing device, a permeable ring, an indication cover and a fixing ring, the sealing device is composed of a stainless steel ring column with a built-in thread and an external hand lifting ring, and the hand lifting ring is fixedly connected with the stainless steel ring column in a welding mode. The permeable ring is composed of an external threaded stainless steel ring column with a hole, and is screwed with the sealer through threads; the indicating cover is composed of a stainless steel disc, and the indicating cover and the water permeable ring are fixedly connected in a welding mode. The fixing ring is composed of a stainless steel ring, and the fixing ring can be directly and completely inserted into soil to be detected.

The invention provides a shoal construction method for a grab dredger, and belongs to the technical field of grab dredger construction.The shoal construction method for the grab dredger comprises the following steps that S10, a surveying worker makes a corresponding construction file according to a construction plan, the construction file is imported into a dredge system of the grab dredger, and the initial excavation position of the grab dredger is marked in a background image; s20, the grab dredger is constructed in place, and if the distance between the initial excavation position and the berthing position of the grab dredger is smaller than 500 m, the grab dredger is controlled by an operator to swing the grab dredger in place; if the distance between the initial excavation position and the berthing position of the grab dredger is larger than 500 m; the grab dredger is propelled along the whole section of a construction area during excavation, the excavation angle can be changed at any time according to the tide water condition by utilizing the characteristic of flexible positioning of the grab dredger steel pile, so that the mud barge is always in a deep water area, and a sufficient convolution water area can be provided for the mud barge; the larboard or the starboard is flexibly selected to lean against the barge, so that the mud barge does not need to be moist.

A turbine 1, particularly a vertical axis Savonius turbine for use with tidal water flow, has at least two blades 3, 5 and an axis of rotation 11. Each blade extends radially outwards from a first end

The utility model relates to the field of path indication boards, in particular to a path indication board for a trestle road, which adopts the technical scheme that the path indication board comprises a box body, an opening is formed in one side of the box body, a display board is mounted on the inner wall of the box body, an arrow indication board is fixedly mounted along the opening of one side of the opening of the box body, and an arrow structure is arranged at one end of the arrow indication board. An opening is formed in the side, close to the box body, of the arrow indication board, and a floating warning device is installed at the bottom of the inner wall of the box body. The floating warning device gives a warning according to the rising tide condition of seawater in the area pointed by the arrow indication board, so that the rising tide condition of the area pointed by the arrow indication board is displayed in real time, the warning effect is achieved, tourists or workers are prevented from mistakenly entering a trestle area submerged by tide water, and the risk that the tourists are injured, trapped and even submerged is reduced.

The invention discloses an intelligent concrete temperature control system based on tidal flow regulation and control of a differential water pipe array. The intelligent concrete temperature control system comprises a tidal water flow regulation and control array, a quick plug interface module, a data acquisition and wireless transmission module based on optical fibers, an intelligent water supply core control subsystem and a terminal, the tide type water flow regulation and control array is composed of a plurality of tide type flow regulation and control units, and each tide type flow regulation and control unit comprises a water pipe, an expansion type flow linear control check block, a fixed end and a first optical fiber; and the optical fiber-based data acquisition and wireless transmission module is used for receiving instructions and data of the terminal and feeding back temperature and strain data to the terminal. The system has the characteristics of modularization, convenience in mounting, accuracy in control, adaptability to different flow conditions and the like, and is suitable for large-scale mass concrete structure engineering with higher requirements on accurate temperature control in subareas in the construction period, such as hydraulic dams, large bridge anchors, high-rise building foundation platforms and other complex engineering scenes with strict requirements on concrete crack prevention and control.

The invention relates to the technical field of flood control walls, in particular to an automatic lifting flood control wall based on rising and falling tidal energy of tides, which comprises an underground tank body buried underground; the buoyancy wall body is arranged in the underground tank body in a lifting manner; the water inlet system is used for discharging tidewater into the underground tank body, a main water inlet channel for the tidewater to enter is arranged on the water guide tank body, and an auxiliary water inlet channel is arranged on the water guide tank body; a drainage pipe is installed on the gutter body and used for draining water in the gutter body into the underground gutter body, and the buoyancy wall rises under the buoyancy effect of water. The guide mechanism is used for guiding the buoyancy wall body; the locking mechanism is used for locking the buoyancy wall body when the buoyancy wall body rises to a preset height; and the drainage system is used for draining water in the underground tank body, so that the buoyancy wall body descends. The wall can be driven to ascend and descend through natural energy of tide fluctuation, external power is not needed, and energy conservation, environmental protection and automatic flood prevention are achieved.

The invention provides a reef building shellfish bottom sowing and field planting method. The method comprises the following steps of bottom sowing sea area selection, fry selection and treatment, fry transportation and bottom sowing and field planting. The bottom sowing sea area is a leeward area with the annual average water temperature ranging from 20 DEG C to 30 DEG C, the salinity ranging from 29 per mill to 34 per mill, the dissolved oxygen content ranging from 4 mg / L to 7 mg / L and the water flow speed ranging from 0.1 m / s to 0.3 m / s, the area is required to be located in the area suitable for reef building shellfish to grow and distribute, and the sea area substrate is mainly corallite or reef. The reef-building shellfish is ostrea gigas, ostrea marginata or giant clam, parents are collected from a natural sea area to be domesticated, and after gonads of the parents are well developed, offspring seeds are obtained by adopting an artificial breeding method. According to the method, the native species obtained in situ are adopted, and artificial breeding acquisition is carried out; manual bottom sowing and field planting are carried out in the large tide, the tide water law is fully utilized, and shellfish survival is facilitated.

The utility model discloses a device for preventing relapse of spartina alterniflora by utilizing tidal energy. The device comprises an intercepting net, a foam floating rod and an anchoring device, the end, facing the seawall, of the intercepting net is fixed to the mud flat through the anchoring device, and the end, facing the sea area, of the intercepting net is connected with the foam floating rod. Through the design of the intercepting net and the foam floating rod, germination and rooting of the spartina alterniflora can be restrained through natural changes of tide, photosynthesis of the spartina alterniflora is reduced, root systems of seedlings are loosened along with flushing of tide water, the survival rate of the seedlings is reduced, and therefore relapse of the spartina alterniflora is effectively restrained. The cost and the workload for preventing and treating relapse of the spartina alterniflora can be obviously reduced, and the application prospect is wide.

The present invention discloses a tidal level observation device, comprising: a vertical tube, which is hollow and vertically immersed in the water body; a cylindrical float placed inside the vertical tube that rises or falls with the water level, the diameter of the cylindrical float being adapted to the inner diameter of the vertical tube; a rangefinder assembly disposed at the upper end of the vertical tube, the rangefinder assembly comprising a rangefinder and an adjustment assembly for adjusting the rangefinder forward, backward, left, and right so that the optical axis of a light beam emitted by the rangefinder is parallel to the longitudinal axis of the vertical tube; and a mounting device fixedly connected to the wall of the vertical tube to secure the vertical tube to a structure near the water or to the bottom of the water. The device not only enables the cylindrical float to float freely up and down, but also facilitates adjustment of the parallelism between the main axis of the light beam emitted by the rangefinder and the longitudinal axis of the vertical tube, thereby improving the accuracy and precision of the measurement, and also facilitates quick and convenient fixing of the vertical tube.

The application provides a mariculture area risk assessment method and device, through constructing a multi-dimensional dynamic element coupling simulation model, the joint simulation of water depth topography, atmospheric forcing field, typhoon moving path, tide boundary and seawater temperature and salinity flow and other various dynamic elements is realized, and more real and fine marine environment characteristic information can be obtained. Through bidirectional data exchange between the wind wave model and the hydrodynamic model, the key parameters such as sea wave radiation stress, tidal current velocity and tidal water level can be updated synchronously, so that the simulation accuracy under extreme sea conditions is significantly improved. On this basis, the application combines the differentiated characteristics of the breeding organisms and the physical disaster-bearing entities, respectively determines the risk grades of the breeding organisms and the physical disaster-bearing entities, and further generates a comprehensive risk assessment result for the target area, so that the actual risk condition can be more accurately reflected, and the scientificity and reliability of disaster warning and management decision of the mariculture area are improved.

The invention belongs to the technical field of bridge construction equipment, and particularly relates to a shoal steel trestle steel pipe pile foundation guide hole operation platform and a construction method.The shoal steel trestle steel pipe pile foundation guide hole operation platform comprises a platform body, four supporting legs and an automatic leveling system, the four supporting legs are located at the four corners of the bottom face of the platform body respectively and connected with the platform body, and the automatic leveling system is in linkage fit with the platform body and the supporting legs; the automatic leveling system can cope with platform inclination caused by natural factors such as tidal water scouring and stormy waves in real time, and can resist the influence of three-level stormy waves; meanwhile, due to the design of an anti-skid cover plate, a cable storage groove and the like of the platform, potential safety hazards in the construction process are further eliminated, and the safety of constructors and equipment is comprehensively guaranteed; the platform main body is designed by adopting high-strength steel, so that the bearing capacity is high, and various drilling machines can be adapted; a reserved hoisting interface and a reserved cable storage groove facilitate installation and arrangement of equipment, and construction convenience is improved; the whole platform is simple in structure, convenient to operate and easy to maintain, and has good application and popularization value.

The invention discloses a method for reconstructing an intertidal zone terrain based on a multi-temporal remote sensing image in combination with a tidal height. The method comprises the following steps: collecting the multi-temporal remote sensing image of a research area and tidal height data at an imaging moment; extracting a tidal water level line in each time phase remote sensing image; drawing a base line and a tangent line; extracting plane coordinates of an intersection point of the tangent line and the tidal water line; the lengths of all tangent lines intercepted by the adjacent water lines are obtained, and the intertidal zone gradient of all the tangent lines is calculated in combination with the tide height at the image imaging moment; selecting a reference surface to calculate the elevation of each intersection point; and according to the obtained elevation of each intersection point, meshing data by adopting a minimum curvature interpolation method, and drawing the terrain of the intertidal zone. According to the method, the intertidal zone terrain is efficiently and accurately reconstructed at low cost, and the change of the intertidal zone terrain every year can be conveniently monitored.

The present invention provides a tidal prediction method and system based on the ISSA-AC-CNN-BiLSTM model, relating to the technical field of applying deep learning models to tidal height prediction. The method comprises: constructing an AC-CNN-BiLSTM model based on an AC module; constructing an ISSA-AC-CNN-BiLSTM model by combining an improved sparrow search algorithm (SSA) algorithm with an AC-CNN-BiLSTM model; and performing tidal water level prediction based on tidal data using the constructed ISSA-AC-CNN-BiLSTM model to obtain a prediction result. The ISSA-AC-CNN-BiLSTM model provided by the present invention can achieve superior feature extraction capabilities and prediction effects, and has high accuracy and strong generalization capabilities when predicting tidal water levels.

This invention relates to a method for continuous shield tunneling under waterways, belonging to the field of shield tunneling technology for under-waterway tunneling. The method includes: constructing a three-dimensional finite element model based on geological survey data, dividing the geological formation into units and inputting parameters, and dynamically applying tidal water level loads; iteratively updating pore water pressure, effective stress, and formation deformation through a nonlinear adjustment mechanism of elastic modulus-water content function and permeability coefficient, combined with a seepage-stress fully coupled algorithm; embedding the shield tunneling process to simulate the interaction between construction disturbance and tidal loads, optimizing shield construction parameters and water-stopping measures; real-time acquisition of monitoring data, correction of model parameters, and dynamic adjustment of construction parameters; simulating the formation response during multiple tidal cycles, evaluating the long-term cumulative effect of tidal water pressure, and optimizing water-stopping strategies and construction plans.