863 results about "Urban construction" patented technology

The invention relates to a GPS positioning-based road network grid digital map automatic generation method in the field of ground mapping. The invention is characterized in that vehicle-mounted GPS equipment is used for gathering data about the travelling track of a vehicle on a road network, that is, road information data; a computer is used for switching the travelling track data from geodetic coordinates to urban construction coordinates and then storing the travelling track data in a track database; the travelling track data in the track database is filtered and enhanced by the computer; the travelling track data after being subjected to processing, filtration and enhancement by the computer is then used for generating a sketch of a road network grid digital map; and finally, the computer is adopted to process the sketch and produce the road network grid digital map. The invention has the following advantages: the data source adopted by the invention is convenient and relatively cheap to acquire; and the road network grid digital map generated by the invention is complete and clear, has high precision, and changes in line with the actual road network, so that the map can better satisfy the application requirements for a road network map on timeliness and accuracy.

The invention relates to a cement concrete permeable brick, a cement concrete permeable road and production methods thereof. At present, most of urban construction adopting the rigid hardened ground has the problems of dust blowing at a fine day, water accumulation and impermeable ground at a rainy day, no groundwater level supplement, no relief of urban heat island effect, and the like. The invention aims to develop a cement concrete permeable brick, a cement concrete permeable road and production methods thereof. The cement concrete permeable brick is formed by pressing and molding a base material layer and a surface material layer, and both the base material layer and the surface material layer contain cement, sand, stone, water adsorbing resin, asphalt powder, diffusant and a water reducing agent. The production method of the permeable brick is realized by molding the permeable brick by a computer full-automatic building block forming machine; and the production method of the cement concrete permeable road is realized by directly pressing the cement concrete permeable road through a road roller. The invention can achieve the aims of water adsorption, water retention, permeability and practicability, can be widely used for a highway, an airport runway, a roadway, a footway, a square, garden construction, and the like and solve the problem of road icing.

The invention discloses a three-dimensional modeling method for achieving building inside and outside integration in a digital map and belongs to the technical field of digital map manufacture. The three-dimensional modeling method comprises the steps of firstly, filing building data; then checking building data; extracting data until all data are right; building a data source; generating a MAXScript script according to the data source and using 3DMAX to convert a MAXScript script file into a three-dimensional model; and finally guiding into a map to finish three-dimensional modeling of the building inside and outside integration in the digital map. The three-dimensional modeling method can economically and quickly achieve a three-dimensional digital map with building information and provides decision basis for urban construction and management.

The present invention discloses a low elevation greenbelt rainwater regulation scheduling pool and a distributed rainwater regulation scheduling pool system. The distributed rainwater regulation scheduling pool system comprises a low elevation greenbelt (1), a rainwater overflow well (2) and a rainwater regulation scheduling pool (7), and water storage, drainage and supply which are integrated with a rainwater pipe network or a sewage pipe network are achieved. Compared with the prior art, rainfall runoff and flood detention can be effectively adjusted, runoff pollution can be reduced, and purification, storage and utilization functions of rainwater are fulfilled; and the system is tightly combined with the rainwater and sewage pipe networks of a city, the problems of urban inland inundation caused by rainstorm, the runoff pollution caused by rain wash, and rainwater resource utilization are solved, water storage is scheduled according to drainage ability of drainage pipelines, an important means is provided for sponge urban construction, and the system has outstanding social, environmental and economic benefits.

The invention discloses a 3D automatic modeling and scheduling rendering method for an integrated pipe network, and relates to the technical field of 3D model building. The method comprises the following steps: data reading; layer creating; cutting scheduling; automatic pipeline modeling; automatic pipe point modeling; and automatic pipe network building. The technical problems, such as 2D-3D integrated management based on underground pipe network data in geographic information, spatial data organizing and rendering, and automatic 3D pipe network building according to 2D data, can be solved effectively. The access efficiency to pipe network information in a 3D scene is improved. The level of unified display, management and analysis of multiple underground pipe network systems having different attributes is improved. An important basis is provided for the acquisition and construction scheme of underground pipe network spatial information in urban construction, especially in smart city building in the future. The rapid development of urban construction leads to large-scale development and utilization of urban underground space resources.

The invention discloses a digitized information system and a digitized information method for remotely and comprehensively monitoring urban inspection wells. The digitized information system comprises a plurality of anti-theft inspection well covers, wireless network nodes, a general packet radio service (GPRS) module and a digitized information system center, wherein the anti-theft inspection well covers are in remote communication connection with the digitized information system center through the wireless network nodes and the GPRS module. The environment information of the inspection wells and the states of the well covers are acquired in real time through wireless terminal nodes and then uploaded to the digitized information system center; and in case that the well covers are thieved and damaged, correlative departments or managers can be timely informed in an acousto-optic alarm and short-message mode, the well covers can be remotely controlled, and the problems of potential safety hazard of people and vehicles and loss of underground cables and equipment caused by theft or damage of the inspection well covers are solved. Meanwhile, by publishing the monitored inspection well data through web, data sharing is realized, an integrated comprehensive information management platform for inspection, processing and supervision is constructed, the level of digitized urban construction is improved, and urban image and urban competitiveness are improved.

The invention discloses an intelligent urban construction examining and approving method based on a case-based reasoning technology. The intelligent urban construction examining and approving method based on the case-based reasoning technology comprises the following steps of constructing an examining and approving case library; inputting new examining and approving case and model parameter information; submitting jogs to a Hadoop cluster to search KNN (k-nearest neighbor algorithm) Map Reduce cases; statistically analyzing a searching result on the basis of a 'weighted integral model'; evaluating and correcting the cases; and performing distributed full-text searching on examining and approving data. The intelligent urban construction examining and approving method has the advantages that by the method, the circumstance of manual examination and approval application at present can be changed, the work efficiency is improved, the basis on examining and approving is increased, and an examining and approving process is intelligent. Distributed searching can be carried out by using a Hadoop frame and a MapReduce frame through a cloud computing center, and a distributed case searching model based on the case-based reasoning technology is established. The 'weighted integral model' is creatively raised to statistically analyzing searched similar cases, and a guidance which is beneficial to new examining and approving cases is obtained.

The invention provides a pipe-jacking construction method for small-diameter pipes. The pipe-jacking construction method includes the steps of surveying and paying off, working well and receiving well manufacturing, pipe-jacking device mounting, pilot drilling, reaming, pipe pulling, other pipe construction in sequence, pipe-jacking device dismounting, pipe head handling and inspection well and cable channel construction. By the pipe-jacking construction method, excavation volume is low, slurry discharging is less, roads are not destroyed, and comprehensive cost is low; construction can be performed all through the year, construction speed is high, project circle is short, construction of an overall design project can be quickened, and working efficiency can be improved; traffic interference is minimized, and normal conditions of traffic in a construction site are guaranteed; environmental pollution like noises and dust cannot be generated, urban environment protection and stability, optimal design of the total planning and engineering construction of the urban construction can be benefited, and urban modern planning programming and construction level can be beneficially improved.

The invention provides an urban traffic system and method. The urban traffic system at least comprising an urban traffic management control center, an information nervous system, a rail station equipment system, an auxiliary station equipment system, a rail vehicle cluster, a passenger management system and a running guaranteeing system is established in a city firstly. By the adoption of the urban traffic system, rail trains capable of running directly to a destination from a departure place are automatically grouped through the system for passengers with the same departure place, the same destination and the same get-on time point according to taking applications sent by the passengers in advance. Trains for passengers with different time, different departure places and different destinations are under the unified real-time control of the urban traffic management control center to designedly, cooperatively, accurately and efficiently run on the optimal running routes planned through a computer, the purpose that each passenger directly reaches the destination from the departure place is achieved, the highest carrying efficiency is achieved as well, and the purpose of the urban traffic system is achieved. The urban traffic system can be used as a main carrying means for urban traffic to be widely applied to construction of each city.

The invention relates to a video monitoring and warning method, comprising the following steps: when a bayonet monitoring unit detects that a monitored object enters a preset monitoring region, one or more images are shot for the monitored object; the bayonet monitoring unit selects the image with the imaging effect which is in line with the requirements from one or more images to carry out the catch, the optimization and the characteristic extraction of an human face image, the extracted characteristic data is sent to a comparison server, the comparison server calls the characteristic data in a human face characteristic database to be compared with the extracted characteristic data, if the comparison result is consistent, a warning instruction is issued. The invention also relates to a video monitoring and warning system. The video monitoring and warning method and the system adopt the active monitoring, the remote comparison and the warning mode to improve the effectiveness and the activity of the system and reduce the pressure of management staff, thereby being applicable to network video monitoring industry and government safety urban construction and realizing the unified and large-scale people tracking by the mode with more convenience and lower cost.

The invention relates to an object-oriented remote sensing image building and a shade extraction method of the remote sensing image building. The method comprises the following steps that the images are preprocessed; the multi-scale division is carried out, and an image scale layer corresponding to the optimum division size of a ground object is selected; non-buildings and non-shades (roads, water bodies, vegetation and bare land) are extracted, and images comprising buildings and the shade candidate object regions are obtained; shade primary extraction is carried out by using spectrum characteristics, the nearest classifier is adopted, a characteristic space is built by combining with the spectrum characteristics, the building primary extraction is carried out, and building potential region and a shade potential region are obtained; and buildings and shades of the buildings are obtained by adopting optimization processing methods of space characteristics, context relationship, smoothening and the like. The object-oriented remote sensing image building and the shade extraction method can effectively solve the problem of confusion among the buildings, the roads and the bare land as well as between the shades of the buildings and the water bodies, the extraction precision of the buildings and the shades of the buildings is high, the process flow is simple, and a certain practical value is realized in the work of basic data updating, urban planning, urban disaster prevention and reduction in the urban construction.

The invention discloses a rapid estimation method for solar energy in a construction size. The method includes the steps that by the comprehensive utilization of LiDAR data and high-resolution remote sensing image data, and three-dimension digital surface modeling is performed on objects such as urban constructions and trees; through simulation analysis of the attenuation effect, on direct solar radiation to the ground, of the atmosphere and the sheltering influence, on direct solar radiation energy obtained by construction surfaces including roofs and wall faces, by the urban objects, the solar energy obtained by the roofs and the wall faces of the urban constructions and dynamic estimated values are obtained. The rapid estimation method is suitable for specific application of using solar energy resources in the construction size in an urban region, wherein the specific application includes optimal configuration of energy resources, installation of solar photovoltaic equipment, design of green and environment-friendly constructions and the like.

The invention discloses an assembly method of a multifunctional smart lighthouse suitable for construction of a smart city. Based on existing streetlamp posts, LED lamps and maintain ports of a town, at the premise of ensuring the technical requirements on due mechanical strength, tightness and the like in lamp posts, wireless Wi-Fi transmitters, traffic lights, vehicle speeding photographing devices, cameras, RFID (radiofrequency identification) devices, environment monitors and the like are added; based on the provision of wireless Wi-Fi internet services, a smart lighting system, a smart traffic system, a smart security system and a smart environment monitoring system are integrated. The streetlamps are applied to each corner of the town; according to the method, land resources used by existing town streetlamps are made full use, and in current construction of smart cities, the difficulties that an information sensing system is difficult to re-network and that repeated construction of such system occurs are overcome.

The invention discloses a non-inclined dry-operation open caisson capable of preventing water burst and land subsidence and a construction method thereof. The non-inclined dry-operation open caisson capable of preventing the water burst and the land subsidence comprises a wall and a blade edge both made from reinforced concrete, wherein a water stop curtain and an uplift pile are arranged at the four sides of the open caisson; a bracket is arranged at the upper end of the outer wall of the open caisson; and the bracket is connected with the uplift pile by steel supports and lifting devices detached section by section. The construction method comprises the following steps of: firstly performing the construction of the water stop curtain and the uplift pile and then manufacturing the bottommost layer of the open caisson; after the desired strength of concrete is achieved, digging earth from the open caisson; uniformly controlling the lifting devices to sink the open caisson slowly, and then performing the construction of a former layer of open caisson upwards, continuing digging the earth and controlling the open caisson to sink to be at a designed elevation. Compared with the existing working well by using a retaining and protecting method, the non-inclined dry-operation open caisson capable of preventing the water burst and the land subsidence omits a foundation pit support with expensive construction cost, and the construction period is shorted; compared with the conventional open caisson, the non-inclined dry-operation open caisson capable of preventing the water burst and the land subsidence is safer, more environment-friendly, better in construction quality, non-inclined, and capable of performing dry operation without mud pollution; and therefore, the non-inclined dry-operation open caisson capable of preventing the water burst and the land subsidence is suitable for wide urban construction in China.

The invention relates to a processing method for rapidly and completely clearing a garbage landfill. With the method, secondary pollution is not occurred. First, a garbage landfill is divided into zones with areas of 1000 to 10000 square meters, and garbage is cleared zone-by-zone. Garbage clearing is carried out by using a comprehensive system with subsystems of an excavation and transportation system, a garbage sorting system, a plastic pyrolysis and distillation system, an organic nutrient soil fertilizer-producing system, and a burning and vapor-producing system, which are related to each other. With the method provided by the invention, an original garbage landfill can be completely cleared and reused, such that a conflict between old garbage landfills and urban construction caused by rapid urban extension can be solved, and a large amount of valuable lands can be saved. The garbage is sorted, such that resources of metals, papers, and plastics can be obtained and reclaimed. With the method provided by the invention, resources that can be utilized are completely turned into resources, wastes are turned into valuable substances, and a pollution problem caused by garbage landfills is eliminated. Therefore, high management costs of garbage landfills are saved. According to the invention, garbage is comprehensively processed, and great economic benefits are generated in each link.

The invention relates to the technical field of resident travel trajectory analysis and computer applications, and provides a real-time recognition method for getting-off stations of bus passengers based on historical travel features. The real-time recognition method comprises the steps of firstly realizing getting-on station recognition for the bus passengers by integrating bus GPS data and IC card data; then building a historical travel feature library containing historical travel trajectory features of residents and historical getting-on rate features of stations through mining historical data; and finally completing real-time recognition for getting-off stations of the passengers through performing similarity matching on the historical data and the historical travel feature library. The method can be applied to the fields such as resident travel trajectory analysis, bus operation dispatching and urban construction planning, and provides an accurate data support.

The invention mainly discloses an urban rainwater purification method and a hydraulic jump type filter used therein. According to the technical scheme of the invention, the urban rainwater purification method comprises the following steps: collecting rainwater, detecting the rainwater, carrying out sedimentation treatment, carrying out pH value treatment, carrying out aeration treatment, carrying out biological purification, carrying out fine filtration, and storing. The used hydraulic pump type filter comprises a first filter cartridge and a second filter cartridge, a detection cavity is arranged at a water outlet, only after water body is detected to be in line with urban water consumption requirements by virtue of a detection head, the water body is conveyed into a water storage tank, otherwise the water body is conveyed into the first filter cartridge and the second filter cartridge to be filtered again. The urban rainwater purification method disclosed by the invention has the advantages that the rainwater is collected and purified, collection, permeation, purification and utilization of the rainwater in an urban range are realized to the utmost extent under the premise of guaranteeing waterlogging prevention and safety of a city, urban waterlogging stress can be effectively alleviated and reduced, purification efficiency is high, water quality of the treated rainwater is effectively improved, utilization of a rainwater resource is promoted, and sponge urban construction requirements are met.

The invention provides a manufacture method for highly antifreezing concrete permeable bricks which are prepared by using ceramic wastes as aggregates and a compound additive. According to the invention, ceramic wastes are recovered, crushed and screened; ceramic waste particles with a particle size of 1.25 mm to 5 mm are selected as aggregates for a permeable concrete surface layer; the selectedparticles are mixed with cement, pigments and the compound additive to form a surface layer material; the particle size of cobblestones at a bottom layer is 2.5 mm to 10 mm; the compound high performance concrete additive is composed of a high efficiency water reducer, an organosilicon waterproof agent and the mineral additive silica fume. The invention enables the problems of poor strength of permeable concrete and poor frost resistance in chilly areas to be overcome; the highly antifreezing concrete permeable brick prepared from ceramic waste aggregates has the characteristics of high strength, substantial permeable effects, good frost resistance, etc., is an environment-friendly construction material, and is especially applicable to ground laying of urban squares, commercial streets, sidewalks, community activity places, parking lots and the like in urban construction in chilly areas.

The invention discloses a sponge concrete brick and application thereof. The concrete brick is prepared from concrete; the concrete disclosed by the invention comprises cement, sand, garden waste, regenerated stones and a brightener at the weight proportion of 100 to (100-140) to (200-290) to (5-35) to (0.15-1.15). According to the sponge concrete brick, optimal configuration of renewable resources of the garden waste material in an urban construction process is achieved by the garden waste. The concrete brick disclosed by the invention has the advantages of relatively good water absorptivity, water permeability and air permeability, relatively high strength, available raw materials, and low preparation cost; and green plants are easy to plant.

The invention relates to the technical field of sponge city construction, and provides a rainwater collecting and processing system. The system comprises a water diversion system, a rainwater seepage unit, a rainwater storage unit, a rainwater processing unit and a rainwater recovering unit; the water diversion system comprises a rainwater collecting groove, a water diversion pipeline, a water diversion pond and a water conveying pipeline, the rainwater collecting groove is connected with the water diversion pond through the water diversion pipeline, and the water diversion pond is communicated with the rainwater seepage unit through the water conveying pipeline; the rainwater seepage unit is arranged in a city green land and used for conveying collected rainwater into the underground rainwater storage unit; the rainwater processing unit filters the rainwater many times, and the sterilized rainwater is conveyed to the place needing water through the rainwater recovering unit. The sponge city rainwater collecting and processing system uses the rainwater for irrigation, toilet flushing, vehicle flushing and landscape water supplementing, saves tap water, reduces water treatment cost and effectively relieves the problem of water resources shortage.

The invention discloses a construction residual soil sludge sintered brick doped with household garbage particles and its preparation method. The sintered brick is composed of the following raw materials by mass: 45-80% of construction residual soil, 10-35% of urban sludge, and 15-30% of an interior fuel. Specifically, with a particle size less than 3mm and a water content of 10%, the interior fuel comprises the components with the following mass percents in the raw materials of the sintered brick: 5-15% of coal slag and coal gangues, and 8-15% of household garbage particles, which are selected from combustible particles that undergo crushing, sorting, and dehydration pretreatments. The method of the invention makes fully use of urban construction residual soil, urban sludge, household garbage and other wastes, and changes waste materials into things of value. And the prepared sintered brick has superior physical and mechanical performances, low production cost, and is energy saving and environment friendly.

A manufacture method a glass reinforced plastic ribbed sand-included tube comprises the following steps of: (1) preparing raw material plastic to a plastic belt with front smooth side and reverse ribbed side, wherein the plastic belt is positively faced to a preset die and is wrapped around the outer diameter of the die for at least one coil to form a plastic ribbed liner; (2) pre-mixing unsaturated polyester resin or epoxy resin with quartz sand and then spirally wrapping sand holding cloth on the plastic ribbed liner for at least one coil to form a sand-included enhanced protection layer; (3) wrapping a glass fiber silk which is socked with unsaturated polyester resin or epoxy resin outside the sand-included enhanced protection layer for at least one coil to form an outer wrapping protection layer; and (4) curing, trimming and de-molding to form the glass reinforced plastic ribbed sand-included tube. According to the invention, a design structure with enhanced and compact liner, reinforced middle part and evenly, repeatedly and repeatedly wrapped outer glass fiber is adopted so that internal and external binding forces are greatly enhanced. The glass reinforced plastic ribbed sand-included tube has the characteristics of good corrosion resistance and wear resistance and excellent toughness and is particularly suitable for big-diameter rain and sewerage pipes deeply buried underground during urban construction.

The invention provides a night light intensity-based estimation method of an average house price of city residences. The method includes: collecting and screening average house price data to obtain average house prices of residence and commodity houses of a target city over a plurality of historical years; acquiring remote-sensing DMSP / OLS night light data for preprocessing to obtain regional night light remote-sensing data of the target city over the corresponding historical years, and obtaining average light intensities by counting; carrying out correlation analysis of the average light intensities and the average house prices of the residence and commodity houses of the target city, establishing and comparing a regression model of the average light intensities and the average house prices of the target city, carrying out reasonableness evaluation on the regression model, and estimating the average house price of the city residences in a future year according to the regression model when verification passes. According to the method, on the one hand, a method of spatial analysis is integrated into study of house price statistics, and on the other hand, the remote-sensing image data which is famous for real-time performance and objectivity is also combined; and the method has important guiding significance for city construction and planning.

The invention discloses a method for treating polluted water by using solid waste steel slag. The present invention modifies steel slag, an industrial solid waste environmental protection material, and adopts steel slag adsorption method to treat eutrophic water and water polluted by heavy metals, which can effectively degrade TP, TN, As, Pb, COD in sewage etc., can effectively improve eutrophic water bodies and water bodies polluted by heavy metals, and can be directly applied to the treatment of urban rivers, lakes, and groundwater, effectively solving the current water pollution problems caused by urban construction and development.

The invention provides an energy carbon emission remote sensing estimation method based on night light images. The method includes the following steps that first, urban construction land is extracted on the basis of the night light images; second, energy carbon emission is simulated on the basis of the night light images. The first step includes the steps that eleventh, a transition zone of the construction land and non-construction land is recognized; twelfth, the construction land beyond the transition zone is extracted; thirteenth, the construction land contained in the transition zone is extracted; fourteenth, all the construction land is obtained. The second step includes the steps that twenty-first, the total value of night light data within all the construction land of an area to be measured is extracted; twenty-second, multiple leading industry types are divided; twenty-third, energy carbon emission inversion models of different leading industry types are constructed. By building the energy carbon emission models, energy carbon emission of any region can be predicted according to the night light images and different leading industry types.

The invention discloses a concrete and a preparation method thereof. The concrete comprises cement, sand, stone, and garden wastes. Preferably, the garden wastes are fragmented garden wastes after grinding. The concrete is prepared by evenly mixing cement, sand, stone, fragmented garden wastes and water according to a weight ratio of 100:90-150:190-250:5-40:45-60. The garden wastes generated during the city construction process are recycled, and the wastes are converted into valuable resource. The concrete has the advantages of good water absorbing performance, water permeability, breathability, and high strength, and can be applied to parts that do not have high requirements on strength. Moreover, the raw materials are easily available, the preparation method is simple, and the preparation cost is low.

The invention discloses an automatic layout method for urban development land. The method comprises the following steps of establishing an urban development land random distribution model by using an information processing system of which the core is a high performance computer, taking geographical data of urban areas as model input data and taking land use span pattern spots as a model processing unit, performing circulation calculation by using the random distribution model, and combining to generate all possible layout schemes of the urban development land through exhaustion; by taking road network density as a detection condition, automatically detecting the road network density of the urban development land in each layout scheme, and saving the layout scheme with the highest road network density; and automatically outputting an engineering drawing, which can be directly used by urban controllability detailed planning, by using plotting equipment. The method overcomes the defects of subjectivity and randomness generated because urban spatial layout is decided by intellectual activity of human brains in urban construction engineering practice.

The invention discloses a construction method for an underground city based on an abandoned mine. The construction method comprises the steps that a pier stud filling method is adopted to recycle industrial square protective coal pillars to form a construction space of the underground city; treatments of skin rolling and beautifying, anchoring and shotcreting and pier-stud-filling reinforced supporting are connected on main roadways and surrounding chambers, and then decoration construction is conducted on the main roadways and the surrounding chambers to form underground business streets; and return-air-shaft protective coal pillars at two sides are recycled through the pier stud filling method to form a regular building space, therefore, the 'one-core, double-city, double-axis and multi-area' construction layout and a main body frame of the underground city are formed, moreover, the whole underground city is equipped with systems of electrical power, ventilation, garbage collection, domestic water, air conditioner, communication, traffic, fire protection and the like, and then self-sufficiency of water, electricity, air and heat of the underground city is achieved. According to the construction method for the underground city based on the abandoned mine, the characters of the abandoned mine are utilized to develop the underground building space, the purposes of enhancing the use ratio of land resources, protecting the environment, relieving the ground traffic pressure and the like are achieved, and optimization of mine resource utilization is achieved.

The invention discloses an SAR image change detection method based on an oriented difference chart. The problems that in the prior art, change information of SAR images of one area at different moments can not be accurately described, and the interference resisting capacity is weak are mainly solved. The SAR image change detection method includes the steps of 1, preprocessing two SAR images of one area at different moments; 2, respectively building a mean-value ratio difference chart and a logarithm ratio difference chart for the two preprocessed SAR images; 3, according to the thought of an oriented filter, enabling the mean-value ratio difference chart to serve as an oriented chart, enabling the logarithm ratio difference chart to serve as an input chart, and carrying out fusing to generate the oriented difference chart; 4, dividing the oriented difference chart through a mean-value cluster level set model based on local joint entropy, and obtaining the result of change direction. By means of the SAR image change detection method, interference of background area information can be effectively restrained, the change direction accuracy is improved, and the SAR image change detection method can be used for natural disaster evaluation, environment resource monitoring and urban construction planning.