26 results about "Flood stage" patented technology

The invention provides a river levee flood control pile foundation stress analysis method and system, and relates to the technical field of river levee flood control pile foundation stress analysis. Multi-channel sensors are arranged on the pile top, the pile side and the pile end, and the sampling frequency is automatically switched along with the flood stage; inverting the soil saturation based on displacement and pore pressure change, dynamically correcting the permeability coefficient and the effective stress, and outputting a space-time coupling parameter matrix; determining a hazard source for the monitoring point, constructing an elliptical search domain by taking the hazard source as a center, and recursively incorporating abnormal points to form a risk area; a seepage-structure full-coupling finite element model is established in the risk area, the outside of the area is simplified through an equivalent spring boundary, and a pile foundation stress-strain field and a safety coefficient are calculated through self-adaptive time step control; and finally, generating a risk report according to safety factor classification, marking a high-risk area, automatically improving the sampling frequency and triggering early warning.

The invention discloses an airport area underground water and surface water system coupling seepage regulation and control method and system, and the method comprises the steps: employing a multi-source data fusion investigation mode to find out regional stratum and structure characteristics, and determining an underground water occurrence migration rule and a surface water and underground water supplement and drainage relation; constructing a coupling seepage model of the underground water and the surface water system under the current condition by applying a numerical simulation method, and defining a dynamic association mechanism of the underground water and the surface water system in time and space; based on a simulation result, determining a transformation scheme that a main stream adopts a double-hole box culvert and a branch stream adopts a single-hole box culvert, and arranging an electric gate at the box culvert; arranging monitoring points of groundwater level, pore water pressure and surface water system flow in combination with field spring water and well distribution, and constructing a cooperative monitoring network; the coupling seepage law of underground water and surface water systems is analyzed based on monitoring data, and the opening degree of a box culvert electric gate is dynamically adjusted to control rising of the underground water level in the flood period. The stability of a water system in an airport area is ensured.

The invention discloses a method for forecasting flood in a drainage basin influenced by strong human activities based on a hybrid model. The method comprises the following steps: firstly, constructing a distributed hydrological model combining sub-drainage basin division and a Muskingum method, and performing calibration; using a hydrological model simulation error and multi-step watershed average rainfall based on river channel propagation time as characteristics, and using a Bayesian optimized LSTM (Long Short Term Memory) to construct an error correction model; and finally coupling the two models to realize real-time forecasting. Verification of the Lanxi river basin shows that compared with a traditional model, the Nash efficiency coefficient of the mixed model is remarkably improved, the flood peak relative error is smaller than or equal to 8%, the peak current time difference is smaller than or equal to 2 hours, precision is stable within the 12-hour forecast period, a long series of continuous historical data is not needed to serve as support, and only data in the session flood period are needed; the method is suitable for hour-scale flood forecasting of the watershed lack of data and strong human activity, an efficient and reliable technical means is provided for flood control and disaster reduction, and the method has wide engineering application prospects.

The application provides a built hydropower station operation water level lifting method based on staged design flood, comprising: analyzing flood seasonal variation law of a target hydropower station reservoir, carrying out flood staging on the target hydropower station reservoir flood, and proposing design flood and design flood hydrograph of different periods; constructing a hydropower station reservoir area water surface line calculation model, combining the design flood of the target hydropower station reservoir to calculate the reservoir water surface line under each starting push water level of different periods; constructing a hydropower station flood regulation model, combining the design flood hydrograph of the target hydropower station reservoir to calculate the reservoir highest flood regulation water level under each starting regulation water level of different periods; based on the reservoir water surface line and the highest flood regulation water level, combing the water level lifting opportunity, the water level lifting scheme is drafted. Through the application, the problem that the existing related technology cannot fully tap the comprehensive benefits of the project is solved.

This system provides a water level correction system that is not limited by installation location and can calculate weather-corrected water level information from measured water level data. [Solution] This water level correction system comprises an information acquisition unit that acquires water level information measured by a water level sensor and weather data measured by a weather sensor; a judgment unit that identifies the start of flooding from flood judgment information; a storage unit that stores weather data at the start of flooding as initial information; and a calculation unit that uses the initial information to correct the water level information for weather conditions. This system enables accurate measurement by detecting flooding at the installation site and correcting the water level for weather conditions while the site is flooded.

The application discloses a kind of strong human activity influence basin flood forecasting method based on hybrid model, first, the distributed hydrological model of combination sub-basin division and masking method is constructed and is rated;Again, with the characteristics of hydrological model simulation error and multi-step length basin average precipitation based on river channel propagation time, error correction model is constructed using Bayes optimization LSTM;Finally, real-time prediction is realized by coupling two models.It is proved by Lanxi basin verification that the Nash efficiency coefficient of hybrid model is significantly improved compared with traditional model, the relative error of flood peak is less than or equal to 8%, the time difference of peak appearance is less than or equal to 2 hours, and the accuracy is stable within 12 hours forecast period.The application does not need long series of continuous uninterrupted historical data as support, only needs the data during the period of flood, and is suitable for hour scale flood forecasting in data-deficient strong human activity basin, provides efficient and reliable technical means for flood control and disaster reduction, and has wide engineering application prospect.

The invention discloses a self-adaptive flood-drought mutual aid system and method for a river channel in an arid region based on terrain remodeling, and belongs to the technical field of ecological water conservancy projects. The system comprises a water and sediment separation topographic unit, a threshold value overflow topographic unit, a narrow and deep evaporation restraining topographic unit and an outer side beach overflowing flood area which are sequentially arranged in the water flow direction and coupled. A bottom plate of the water-sediment separation shape unit is provided with a transverse slope inclining towards an outer side concave bank, and bottom layer sediment is guided by gravity to be conveyed to the outer side; the narrow-deep evaporation-inhibiting terrain unit adopts a narrow-deep compound section with a large depth-to-width ratio to collect clear water so as to inhibit evaporation; and the top of the threshold overflow terrain unit forms a physical threshold for flood and drought switching. The invention further discloses a corresponding implementation method. According to the system, by remodeling the geometric shape of a riverbed, self-adaptive switching between clear water returning, efficient sand discharging and evaporation restraining in the dry season and muddy water beach overflowing, ecological supply and automatic dredging in the flood season is achieved, and the problems of water-sand contradiction and ecological water use of wandering rivers in the arid region are effectively solved.

The invention relates to the technical field of bridges, and provides a hybrid beam cable-stayed bridge concrete side span and cast-in-place support interactive design method, through interactive design of a concrete side span and a cast-in-place support, unification of structural safety, structural economy and support cost saving is achieved, and the cost of the whole construction process is saved; according to the method, in the interactive design process, the three-level adjustment priority of a support batch dismantling scheme, prestressing tendon arrangement and the geometric size of a main beam is established, and the influence of concrete side span parameter adjustment on a middle span steel beam is reduced to the minimum; according to the method, for the structure meeting the stress requirement and the support meeting the flood crossing requirement, the structure newly-added cost and the support amortization cost are comprehensively considered, the most economical combination scheme is selected, the project life cycle cost is minimized on the premise that safety is guaranteed, and on the premise that the structure stress safety is guaranteed, the project life cycle cost is reduced. Risks of water blocking and damming of a large number of supports in the flood period are thoroughly avoided, and smooth flood discharge and safety of the support structure are ensured.

The invention discloses a flood event segmentation and feature extraction method and device, and the method comprises the following steps: obtaining basic time flow data related to flood, and carrying out the data standardization and time granularity unification processing of the basic time flow data; setting a dynamic flood threshold value, and screening the data set according to the dynamic flood threshold value; performing space-time expansion detection on the flood event; overlapping adaptive merging is carried out on the flood events; and displaying a result through a multi-dimensional flood characteristic quantitative model. According to the technical scheme provided by the invention, a scheme for automatically dividing flood processes and sessions can be provided for flood characteristics of different drainage basins, the flood sessions are adaptively divided, and the segmented flood processes are subjected to characteristic quantification, so that the flood sessions correspond to rainfall periods, and reorganization of flood data and rainfall runoff flood correlation research are facilitated.

The application discloses a construction method for changing a single-wall cofferdam into a double-wall cofferdam, which comprises the following steps: underwater terrain exploration on the outside of the single-wall cofferdam, leveling the covering layer or bare rock surface on the outside of the single-wall cofferdam; installing an outside cofferdam on the outside of the single-wall cofferdam during a low water level period; performing joint sealing of the outside cofferdam; filling the joint with bagged concrete by means of a diving plug on the periphery of the outside cofferdam, and then pouring concrete between the single-wall cofferdam and the outside cofferdam; after the strength of the concrete between the single-wall cofferdam and the outside cofferdam reaches a design requirement, performing hierarchical water pumping and layered installation of inner supports in the cofferdam, and preparing for construction of a bearing platform. The construction method for changing the single-wall cofferdam into the double-wall cofferdam changes the structure of the single-wall cofferdam into the structure of the double-wall cofferdam, increases the structural strength of the original single-wall steel cofferdam under the condition of a flood period or a high water level, reduces the influence of the flood period or the high water level, guarantees the continuity of bridge foundation construction, ensures the implementation period, and avoids increase of project cost.

The utility model discloses a bridge pier on-line safety monitoring device which comprises a scour depth monitoring unit and an anchoring assembly, and the scour depth monitoring unit is fixed on a riverbed through the anchoring assembly. The anchoring assembly comprises a punching pile sleeve and a connecting rod, a plurality of tensile rods capable of horizontally moving are arranged in the punching pile sleeve, the tensile rods are used for horizontally stretching out to be inserted into a riverbed when the punching pile sleeve is in place, and the connecting rod is arranged in the punching pile sleeve and can axially move along the punching pile sleeve and drive the tensile rods to horizontally stretch out to be embedded into the riverbed. According to the utility model, by arranging the anchoring assembly comprising the tensile rod, when the scouring depth monitoring unit is anchored, the tensile rod horizontally extends out to be fixed with a riverbed; in the flood period of a big river, due to the action of the tensile rod, the punching pile sleeve and the connecting rod can be prevented from being pulled out, and the working environment of the scouring depth monitoring unit can be effectively guaranteed.

The application discloses a kind of infrastructure flood resilience evaluation methods, comprising: using flood simulation coupling model to carry out the whole process simulation of urban flood in multiple scenarios to target area;From the simulation process, the spatial attribute index of blue-green-gray infrastructure is extracted as the independent variable, the flood dynamic index of different flood stages is extracted as the dependent variable, to form a sample data set, and the independent variable is divided into multiple independent variable groups according to function;Standardization is carried out on the independent variable and the dependent variable respectively, and data enhancement is carried out;Bayesian mixed effect model is constructed, prior distribution is set for model parameters, posterior distribution of parameters is obtained based on the enhanced sample data set using sampling algorithm, and the evaluation result is output according to the posterior distribution.The application can clearly reveal the dynamic action law of blue-green-gray infrastructure in initial rising period, flood peak period and recession period, output more stable and reliable phased dynamic resilience evaluation result, and significantly improve the safety guarantee level of urban flood control and drainage.

The application discloses a flood resisting method for a steel pipe pile structure in water and the steel pipe pile structure in water, and relates to the technical field of the steel pipe pile structure in water. The specific steps are as follows: the steel pipe piles are connected through a transverse water flow direction connecting system, the overall horizontal bearing capacity of the steel pipe pile structure is improved, and the transverse water flow direction connecting system is orthogonal or oblique to the water flow direction; when flood occurs, the water flow force acts on the transverse water flow direction connecting system, the connection between the transverse water flow direction connecting system and the steel pipe piles is adjusted in advance, the transverse water flow direction connecting system is rotated or moved, the water resistance area of the transverse water flow direction connecting system is reduced, and the load of the water flow on the transverse water flow direction connecting system is reduced; after the flood ends, the transverse water flow direction connecting system is reset, the adjacent steel pipe piles are reconnected, and the steel pipe pile structure returns to normal use. The negative effect of the transverse water flow direction connecting system during flood resisting is eliminated, the water resistance area during the flood period is reduced, and the flood resisting capacity of the structure is enhanced.

The utility model provides an anti-seepage structure for a sluice pump station, and relates to the technical field of anti-seepage structures, the anti-seepage structure comprises a bottom plate, the top of the bottom plate is provided with a sluice pump station chamber, the bottom of the bottom plate is provided with a floating assembly, the floating assembly comprises a first waterproof plate, the outer surface of the first waterproof plate is provided with first round holes close to four corners, and the first round holes are communicated with the first waterproof plate. The inner walls of the four first round holes are fixedly connected with fixing shafts. According to the utility model, by arranging the floating assembly, during a flood period and a high water level, the water level can drive the floating block to float on the water surface, the floating block can drive the top of the first waterproof plate to be in contact with the bottom of the bottom plate, and the second waterproof plate and the third waterproof plate can be embedded into the second groove and the third groove respectively; and the second waterproof plate and the third waterproof plate are in a waterproof state, so that leakage at the bottom of the sluice pump station chamber is prevented.

A kind of total phosphorus simulation method of basin based on new aujiang three water source components belongs to the technical field of basin hydrology and water quality coupling simulation. First, collect the basic data of flood event in the study basin, and uniformly arrange and pretreat, obtain the flood event data set. Secondly, the new aujiang model of flood period hydrological simulation is constructed, the surface runoff, the soil water runoff, the groundwater runoff and the reservoir discharge after river evolution are calculated, and the three water source components and the total flow of the study section are obtained. Thirdly, the total phosphorus simulation model of flood period is constructed, the total phosphorus load of the study section is obtained, and the total phosphorus concentration is calculated combined with the section flow. Finally, the new aujiang model parameters and the total phosphorus simulation model parameters are calibrated and verified. The present application can realize the simulation of total phosphorus concentration in the flood event process of small and medium-sized basins affected by the regulation of upstream reservoir, provide technical support for the evaluation of basin water environment, pollution load analysis, identification of reservoir regulation influence and pollution control measures.

The invention relates to the technical field of disaster recognition, in particular to a corn flood disaster recognition method based on a high-resolution remote sensing image, which comprises the following steps: acquiring a multi-temporal remote sensing image of a target area, and dividing flood stages based on a flood development process, including a water accumulation period, a flooding period and a water recession period; aiming at each flood stage, respectively extracting stage specific characteristics of the corn canopy; and inputting the stage specific features of each flood stage into a multi-stage collaborative recognition network, and outputting a corn flood disaster recognition result including dominant damage and recessive stress through inter-stage feature transmission and recessive stress analysis. According to the method, the continuity, interpretation and inter-stage coupling sensing capability of disaster recognition are improved, the method is particularly suitable for crop types sensitive to ponding and submerging response such as corn, quantitative reasoning of invisible stress is only achieved, and the disaster situation development direction and short-term recovery expectation can be output.

This product is a waterstop that is installed on levees or on flat ground around houses during floods to prevent overflows and flooding.

The application relates to the technical field of bridges, and provides a mixed beam cable-stayed bridge concrete side span and cast-in-place support interactive design method, which realizes the unity of structural safety, structural economy and support cost saving through interactive design of the concrete side span and the cast-in-place support, and saves the construction whole-process cost; in the interactive design process, a support batched dismantling scheme, prestressed beam arrangement and three-level adjustment priority of the main beam geometric size are established, the influence of concrete side span parameter adjustment on the mid-span steel beam is reduced to the minimum; the application comprehensively considers the structural new cost and the support amortization cost of the support meeting the stress requirement and the flood season demand, selects the most economical combination scheme, realizes the minimization of the whole life cycle cost of the project under the premise of guaranteeing safety, and can completely avoid the risk of a large number of supports blocking and piling up water in the flood period under the premise of guaranteeing the stress safety of the structure, and ensures smooth flood discharge and support structure safety.

This product is a waterstop that is installed on levees or on flat ground around houses during floods to prevent overflows and flooding.

The utility model relates to the technical field of ecological filter dams, in particular to a combined ecological filter dam which comprises a filter dam body composed of a concrete base and two sets of concrete retaining walls, at least two sets of floating island supporting rods and / or a detachable intercepting device. The two sets of concrete retaining walls and the bottom of the concrete base form a groove position, and the detachable intercepting device is arranged in the groove position. The ecological filter dam can be combined according to a dry season and a flood season; in the dry season, the ecological filter dam can retain the upstream water level and guarantee the ecological flow of the river channel, and meanwhile the filler can adsorb water pollutants and purify the water quality; in the flood period, an artificial floating island can be installed on the ecological filter dam, the river channel water quality is purified through built-in artificial aquatic plants, meanwhile, the flood passing capacity of the river channel is not affected, and the combined mode can be better and flexibly adjusted according to season requirements. The ecological filter dam can solve the technical problem that an existing ecological filter dam can hinder flood discharge of a river channel in the flood period.

The invention discloses an underground water refilling method based on flood diffusion and flood irrigation, and the method comprises the steps: selecting a utilization region suitable for the implementation of flood diffusion and flood irrigation from candidate regions according to a plurality of preset comprehensive evaluation indexes, the comprehensive evaluation indexes comprise a riverway longitudinal slope, a flood period water level uplift characteristic, a diffusion area surface slope, a terrain continuity index, a surface layer or shallow layer permeability coefficient, an underground water burial depth, a diffusion area controllable boundary proportion and a safe overflow condition index; a drainage facility is arranged on a river reach bank slope corresponding to the utilization area, and multiple stages of diversion units are arranged in the utilization area in the flood diffusion direction to distribute and guide the flow direction of the flood entering the utilization area; in the boundary area of the utilization area, the flood diffusion range is controlled based on the natural terrain and / or the artificial structure, and a safety overflow channel is arranged and used for discharging redundant flood in order when the flood flow exceeds the stagnant storage capacity of the utilization area. The flood retention time can be prolonged, and the flood infiltration efficiency is improved.

This product is a waterstop that is installed on levees or flat areas around houses during floods to prevent overflows and flooding. This product consists of L-shaped plates that overlap each other and can slide left and right, and the width in the left and right direction can be adjusted, as shown in the perspective view and the reference perspective view of the retracted state.

The application discloses an airport area underground water and surface water system coupling seepage regulation method and system, and the method comprises the following steps: adopting a multi-source data fusion survey mode to find out regional stratum and structure characteristics, to determine the underground water occurrence and migration rule and the surface water and underground water recharge and discharge relationship; and using a numerical simulation method, constructing an underground water and surface water system coupling seepage model under the present situation, and determining the dynamic correlation mechanism of the two in space and time; based on the simulation result, determining the reconstruction scheme of adopting a double-hole box culvert for the main stream and a single-hole box culvert for the branch stream, and setting an electric gate at the box culvert; combining the field area spring eye and water well distribution, arranging the monitoring points of the underground water level, pore water pressure and surface water system flow, and constructing a cooperative monitoring network; based on the monitoring data, analyzing the underground water and surface water system coupling seepage rule, and dynamically adjusting the electric gate opening degree of the box culvert to control the underground water level rising in the flood period. The airport area water system stability is ensured.

This utility model provides a travel limiting device for the guide channel of a floating bollard in a lock, including a stop block and fasteners. The stop block is arranged at the top of the guide channel of the floating bollard and has a first through hole. A second through hole is provided at the top of the guide channel of the floating bollard. The fasteners are arranged to pass through the first and second through holes in sequence, and the fasteners fix the stop block to the top of the guide channel of the floating bollard. This application limits the floating bollard guide wheel from rolling out of the guide channel of the floating bollard by setting the stop block, thereby preventing the floating bollard from being swept out of the guide channel during flood season as the water level rises and falls, thus preventing danger. In addition, when it is necessary to remove the floating bollard for maintenance, the fasteners and the stop block can be removed, thereby facilitating the removal of the floating bollard from the guide channel of the floating bollard, making disassembly and installation convenient.

The utility model relates to benthic animal sampling device field, concretely relates to a sampling device suitable for large benthic invertebrate investigation in flood period, including cement fixed base, drift net and buoy. The cement fixed base is made of hollow brick irrigation cement, its top surface central fixed has annular steel ring, and the edge is fixed with support rod, the drift net includes square net frame and net bag, and is fixed in the base side through support rod, the buoy is connected with the annular steel ring of base through the rope. The utility model discloses the self -weight of cement base resists the impact of water flow, solves the problem that the existing drift net is prone to lodging in flood period, and cannot be used in hard riverbed, and through the cooperation of buoy and rope, realizes the quick positioning and recovery in deep water environment, and the device is simple in structure, stable and reliable, and has wide bottom quality adaptability, and is suitable for benthic animal sampling in flood period, various bottom quality and complex water flow conditions.