239 results about "Slope ratio" patented technology

The invention discloses a method for building a highway road bed with waste steel residues. The method comprises the steps: firstly, waste steel residues are adopted to build the road bed; secondly, the building speed of the road bed built with waste steel residues is required to be controlled to guarantee the road bed stability; thirdly, the road embankment built with waste steel residues is compacted by a vibratory road leveling machine in layers, during the compacting, the waste steel residues shall be in the optimum moisture content scope, through the trial road section method, the appropriate compacting machines and tools are determined, and the maximum dry density and the optimum moisture content are adopted as the compaction degree calculating standard in the road bed built with waste steel residues; and fourthly, the cross section design of the waste steel residue road embankment comprises the road embankment height, the side slope ratio of the road embankment, the building layer thickness, a top sealing layer, a bottom sealing layer, an intercalated layer, the slope protection and a drainage system. The invention has the advantages that the method is easy, the operation is convenient, the waste steel residue piling ground and the environmental pollution are reduced, the wastes are changed into valuables, the environmental protection is promoted, the method solves the problem that the highway engineering packing material is inadequate, the cost is low, and the quality of the built road bed can satisfy the construction requirements of the road bed of the higher grade highway.

The invention discloses a method for mixed culture of crabs, shrimps and mandarin fishes. The method comprises the following steps: (1) water in a pool is 0.3-1.5m deep, the slope ratio of the pool is 1:3, high-protection facilities are built at the periphery of the pool, and an automatic aerator is arranged per 667m<2>; (2) the plant area of waterweeds in the pool accounts for one third of the area of the pool, and at the same time, snails are stocked; (3) at the end of March, 500-700 crabs per 667m<2> are stocked based on the standard of 80 crabs per kg, 5-7kg of post larvae of lobsters per 667m<2> are stocked in the first and middle third of April based on the standard, 7-10 mandarin fishes per 667m<2> (in 5 cm length) are put in the last third of May, and 6 kg of fingerling silver carps per 667m<2> are put in the first third of June based on the standard of 800-1000 fingerling silver carps per 1kg; (4) overhead price river crab feed cp.40% is used, supplementary with wheat and bean pulp, feed amount daily is controlled to 4-6% of the weight of shrimp and crab; and (5) a water quality regulator is used for one time per 15-30 days. On each day, shrimp and crab shell auxin and allicin, the amount of which account for 1-1.5% of the amount of feeds, are added.

The invention relates to an accurate detecting method of a highway lane guide line, which belongs to the technical field of intelligent traffic. The method comprises the following steps: firstly, gathering road traffic images to detect light intensity of environment, utilizing a pavement grey scale value as a threshold value basis, properly correcting according to the light intensity, segmenting images to get corresponding binary image, doing Hough switching after doing corrosion treatment for the binary image, roughly extracting all bright pixels on each lane guide line and near each lane guide line to be pixel points which need to be classified, and forming a sample set, selecting a clustering central point, respectively extracting the slope ratio and interception of a connecting line of each sample point and each clustering central point as a sample point characteristic parameter, and forming a sample characteristic set, clustering the sample points to different sample sets according to a clustering rule, extracting characteristic parameters of each sample, and calculating arithmetic average, and getting the slope ratio and the interception of the straight line which is got, and detecting out the corresponding lane marking line. The method has the advantages of simple calculation and high detecting precision and the like.

A method for classifying a road surface condition by estimating the maximum tire / road surface coefficient of friction and actively inducing acceleration or deceleration. In one embodiment, the induced acceleration / deceleration is provided by applying torque to the driven wheels of the vehicle. The speeds of the driven and non-driven wheels are measured. The tire / road surface coefficient of friction and the driven wheel slip ratio are calculated from the wheel speeds. The tire / road surface coefficient of friction and the wheel slip ratio are used to determine the slope of the wheel slip / coefficient of friction curve, which is used to classify the road surface condition.

The invention discloses a technique for safe improvement as well as ecological repair and reconstruction of a mine soil discharge yard. The technique is implemented according to the following processes and steps: carrying out comprehensive optimization according to experience, calculation and land use properties to determine slope, slope length and flat pan width of the soil discharge yard, and designing slope cutting grade of an accumulation side slope of the soil discharge yard into three grades, wherein the height of each grade of slope is 9-11 m, the flat pan width of the side slope is 4-8 m, and the slope ratio is as follows: the first grade is 1:(2.0-2.1), the second grade is 1:(1.7-1.8) and the third grade is 1:(1.45-1.60); preparing the flat pan into a horizontal, slope or reverse slope type; and constructing the first-grade and second-grade side slopes by adopting grass planting in stone masonry arch rack, slope bottom apron protection, and designing mortar flag stone side slope flat pan and water discharge channel of the flat pan as well as slope edging, constructing the third-grade side slope by a vetiver grass slope protection greening technique, firstly sowing Bahia grass in the flat pan of the soil discharge yard with the seed amount of 15-25 g / m<2>, after sowing, maintaining and managing in time, checking seedlings and supplementing deficient seedlings, harvesting 1-2 times every year and maintaining seedling height of 20-30 cm when most stem tillers enter fringe-bearing flourishing growth stage, and planting fruit trees or crops in the flat pan after 1-2 years. In the technique disclosed by the invention, engineering measure and biological measure are comprehensively adopted to ensure the safety of the mine soil discharge yard and achieve good ecological repair effect and landscape effect; and plants adaptable to local conditions are planted and the cost is lower.

The invention provides a breeding method and a pond for improving the commercial specification and the yield of procambarus clarkii in the pond. The breeding method comprises the following steps: drying the pond under the sun; putting young procambarus clarkii into the pond for the first time; performing catch rotation on commercial procambarus clarkii for the first time; putting young procambarus clarkii into the pond for the second time; performing catch rotation on commercial procambarus clarkii for the second time; and thoroughly draining water of the pond, and catching all commercial procambarus clarkii. The pond comprises a circular groove which is digged along the periphery of the pond, wherein the circular groove has an upper bottom width of 6 to 10 meters, a lower bottom width of 1 to 5 meters, a depth of 0.8 to 1 meter, a ridge height of 0.8 to 1 meter and a slope ratio of 1: 3; the area of the circular groove accounts for 20 to 30% of the total area of the pond; the a region, located at the inner side of the circular groove, of the pond is piled with a central enclosed beach; and the distance between the water level of the pond and the central enclosed beach is in a range of 10 to 70 cm. The invention has the following beneficial technical effects: by adopting the method provided by the invention, 200 to 250 kg of commercial procambarus clarkii can be harvested in two seasons, wherein the proportion of the commercial procambarus clarkii with a specification of 40 g or more reaches 60 to 70%.

The invention provides a construction paying off method for determining the boundary point of a side slope of a subgrade on a terrain line, which can improve the paying off efficiency of the boundary point of the side slope of the subgrade and meet the requirement for the construction precision of the side slope of the subgrade, and can be extensively completed by testing an intervisible part of any survey station arranged outside the design center line of a road. The method comprises the following steps of: setting a mileage reference point on the center line of a road, evaluating the shortest distance between the side point of the center line and the horizontal curve of the road by using the method of uniform approach so as to determine the vertical distance and the foot-point mileage between the slope point subjected to on-site pretesting and the design center line of the road in a plane; calculating the theoretical horizontal distance between a crossover point of an elevation surface on which the pretesting point is positioned and the design line of the side slope and the design line of the subgrade according to the design parameters such as the center-line elevation and the subgrade at the mileage, the width of a structure, the slope ratios and the step numbers of the cross slope and the side slope, and the like; subtracting the vertical distance from the theoretical horizontal distance so as to obtain the displacement from the pretesting pint to the theoretical boundary point; and moving the pretesting point, and repeating the steps to make the displacement asymptotically to zero so as to determine the position of the boundary point of the side slope.

The invention discloses an ecological restoration method for a municipal eutrophicated river. The method comprises the following steps: arranging a barring and controlling water level system at a barring and controlling water gate of the river; in the main stem of the river, piling cubic meters of earth obtained after desilting to form an along-river gentle slope and a river-center island, wherein a bank slope ratio is 1: 2.5 to 1: 5, and a shoal water zone and a deep and broad water zone are successively formed from a dam of the river to the center of the river; carrying out rock mound type and jack-like concrete block type bottom shape reconstruction on the slope surface of the along-river gentle slope; constructing embankment-zone aquatic plant zones at the river-center island and the along-river gentle slope having undergone bottom shape reconstruction and constructing a plant floating bed bio-zone in an along-river zone; and releasing filter-feeding and omnivore fish, shellfish and shrimps. With the restoration method provided by the invention, the water quality of the river is improved from class IV and V to class III or a higher class; biodiversity of a water area is increase by more than 2 times; the river has better capability in smooth regulation of water storage and flood discharge; and a water system has the further improved functions of underground water supplement, carbon immobilization, oxygen release, climate adjustment, water conservation, etc.

The present disclosure generally relates to processing visual data of a road surface that includes a vertical deviation with a lateral slope. In some embodiments, a system determines a path expected to be traversed by at least one wheel of the vehicle on a road surface. In some embodiments, a system determines, using at least two images captured by one or more cameras, a height of the road surface for at least one point along the path to be traversed by the wheel. In some embodiments, a system computes an indication of a lateral slope of the road surface at the at least one point along the path. In some embodiments, a system outputs, on a vehicle interface bus, an indication of the height of the point and an indication of the lateral slope at the at least one point along the path.

The invention belongs to the field of mold erecting and pouring technologies for drainage ditches for airport construction engineering, and discloses a method for forming trapezoidal drainage ditches by means of pouring on the basis of adjustable groove forming molds. The method has the advantages that by the aid of the method, the problems of incapability of recycling mold erecting devices and the like, long construction periods, difficulty in guaranteeing the construction quality of existing drainage ditches and the like due to variable sections of most existing grooves and structural limitation of the existing mold erecting devices and existing excavator bucket devices when the existing grooves of the existing ditches are constructed can be solved; grooves are subjected to one-step excavation and one-step mold erecting pouring by the aid of adjustable excavator bucket devices and the groove forming molds, the adjustable groove forming molds comprise mold erecting supports, wood mold plates and hollow steel pipes with rectangular sections, and every two corresponding wood mold plates cling to the inner side wall of the corresponding groove of the corresponding drainage ditch, can be supported by the corresponding mold erecting supports and can be tensioned by rotary components; slope ratios of the mold erecting supports of the adjustable groove forming molds can be adjusted according to change of slope ratios of the grooves, the molds only need to be simply adjusted without mold processing, accordingly, the molds are high in utilization rate as compared with the traditional integral welded mold erecting supports, and adjustment procedures are simple.

The invention discloses microbial mineralized cementation treatment liquid and a sandy slope treatment method. The microbial mineralized cementing treatment liquid is formed by mineralized bacteria liquid, bacillus liquid and a calcium source mixed solution which are independent of each other according to the volume ratio of 1:(5-10):(1-3). The mineralized bacteria liquid is divided into 1# bacillus pasteurii liquid and 2# staphylococcus liquid, wherein the 1# bacillus pasteurii liquid is suitable for treating sandy soil with the slope ratio being smaller than 1: 1 and the particle size ranged being smaller than 20 mm, and the 2# staphylococcus liquid is suitable for treating sandy soil with the slope ratio being smaller than 1: 1 and the particle size range d being larger than 0.074 mm and smaller than 10 mm. When the sandy slope is treated, the mineralized bacteria liquid is sprayed on the sandy slope first, then the calcium source mixed solution is sprayed, spraying is carried outtwice a day in the order and carried out for five days continuously, and the bacillus pasteurii liquid is sprayed again after a solidified layer on the sandy slope reaches a certain thickness.

The invention discloses a method for recognizing the ST segment of an electrocardiosignal. According to the method, a wave S and a wave T are accurately located through a slope ratio extremum method based on a peak R for the filtered electrocardiosignal, and finally the displacement, slope and length characteristics of the ST segment are accurately recognized. The method is simple in calculation, easy to implement and high in accuracy rate, and a new way is provided for fast and effective recognition of the electrocardiosignal.

A method for greening side slopes with greening brick cages includes the following steps that restoration is performed, wherein the slope surfaces of the side slopes are finished according to slope ratios, slope heights and flatness of the side slopes, sundries on the slope surfaces are cleaned up, and thus the handled slope surfaces are regular and consistent in slope ratio; meshes are hung, wherein after anchor rods are fixed to the side slopes, the wire meshes are connected with the anchor rods, and the wire meshes are fixed to the side slopes; the cages are hung, the wire mesh brick cages are connected with the anchor rods and the wire meshes so that the wire mesh brick cages can be fixed to the side slopes; borrowed-soil spray-seeding is performed, wherein mixed soil is sprayed in the mesh cages and the wire meshes, and continuous hardened bodies with plant growth matrixes are formed; mixture spraying is sprayed, wherein a mixture made of grass seeds is sprayed onto the mixed soil to form spray-seeding faces; covering is performed, the spray-seeding faces are covered with covering materials. With the method, the side slopes can be effectively greened, borrowed soil can be fixed to the side slopes more firmly, the borrowed soil layers are high in constitutive property, fast greening of the side slopes is achieved, the problem about water and soil loss is solved, and the side slopes have the advantages of being resistant to scouring and landslide, firm, durable and long in greening effect time.

The invention relates to a multi-layered structure of a high fill roadbed alongside a mountain, comprising a mountain body, a rockfill embankment, a drainage canal, a block stone, a soil-stone mixture, a mountain platform, a platform and a cross slope, wherein the multi-layered structure comprises a mountain body, a rockfill embankment, a drainage canal, a block stone, a soil-stone mixture, a platform and a cross slope. The hill is excavated into a stepped structure, and the hill is provided with a hill platform; The subgrade of Shanao road section in the lower part of the stepped mountain body is filled with a rock-filled embankment, the thickness of the pavement layer of the rock-filled embankment is not more than 60cm, and the filling stones are blocks of different sizes of 20-30cm, andcrevices are left between the blocks; and the rock-filled embankment is filled with the rock-filled embankment. Non-woven geotextiles are laid on the top surface of the rockfill embankment; The rockfill embankment consists of graded slopes with platforms between each grade, and the slope ratio is consistent. An inverted trapezoidal drainage channel is arranged at the bottom of the slope of the rockfill embankment; Earth-rock mixture fills from the top surface of the rockfill embankment to the bottom of the roadbed in stages. The invention has the beneficial effects that the subgrade stratum is filled with a block stone, and can be used as a surface drainage water permeable layer, thus ensuring the smooth drainage of the subgrade after the subgrade is filled, and reducing the influence ofsurface water on the stability of the subgrade during the operation period.

The invention proposes a method for remediation and ecological restoration of a mine dump, which comprises: cutting the mine dump into three levels, the slope height of each level is 8m, the width of the horizontal step is 4m, and the slope ratio is 1:1.9 for the first level respectively. ~2.2, the second level 1:1.6~1.8, the third level 1:1.4~1.5; the surface of the horizontal step is subjected to local foreign soil, and the thickness of the foreign soil is 30cm; the slope surface is grouted and covered with soil; The slope adopts the mortar masonry arch frame, the slope bottom skirt, the drainage ditches on both sides of the slope, and the slope edge; 15cm horizontal planting ditch; sow herbs and native shrubs in the ditch, keep the soil 2-3cm on the surface moist, and maintain and manage it in time; plant cloves on the horizontal step surface of the slope. The invention adopts biological measures and assists certain engineering measures to comprehensively control the soil dump, and the cost is low.

Method for locating fault lines or surfaces in 2-D or 3-D seismic data based on the fact that fault discontinuities in the space domain span a wide range in a local slowness (slope) domain, whereas other dipping events in the space domain data, such as noise, tend to be coherent, and hence will appear focused in the slowness dimension. Therefore, the method comprises decomposing the seismic data (102) by a transformation to the local slowness domain, preferably using Gaussian slowness period packets as the local slowness or slope decomposition technique, thereby avoiding problems with the data stationary assumption. In the local slowness domain, faults may be identified (104) using the principle mentioned above, i.e. that faults are represented as a truncation in the space domain data, hence they will appear broadband in the slowness dimension.

A detection and predetermination calculational method for rapid variation light power comprises steps of: respectively obtaining characteristic parameters and a threshold value of an instant slope ratio of all gears of a TIA circuit which are stored in a parameter table; calculating the instant slope ratio value of output signals of the TIA circuit in real time, and comparing the real time instant slope ratio value and the threshold value of instant slope ratio; when input light signal varies quickly, determining the beginning power value of input light variation, and calculating the real variable quantity of the input light power according to the instant slope ratio of the output signals of the TIA circuit; adding the beginning light power of input light variation and input light power variable quantity obtained by predetermination calculation to obtain determination light power when input light rapid varies to serve as the real instant power of the input light, comparing the light power value obtained by predetermination and the light power value obtained according to the output signals of the TIA circuit, finishing the predetermination calculation when the predetermined light power value and the light power value are closer, using the light power value as the real instant power of the input light. The method greatly speeds up light power detection speed and can accurately display the light power value of fast variation.

The invention discloses a structure of standard steel forms for constructing thin-wall high pier groups with four sides being variable cross sections by form turnover. The structure is characterized in that each standard steel form comprises standard forms in the transverse direction of a bridge 1, standard forms in the longitudinal direction of the bridge 2 and slope reducing forms 3; the slope reducing forms 3 are arranged at the corners between the standard forms in the transverse direction of the bridge 1 and the standard forms in the longitudinal direction of the bridge 2; the heights of the three types of forms are all equal to the height L of a single construction section; the number of modulus sections of the slope reducing forms 3 is equal to group height h / single construction section height L; the slope ratio of the slope reducing forms 3 is equal to the slope ratio of pier bodies and the slope ratio i of the high pier groups; and the top width An and Bn of each slope reducing form increases progressively from top to bottom based on single construction section height L / pier body slope ratio i width. The structure can effectively solve the problems of large number of intermediate form blocks, high amount of processing, high dismounting frequency, labor and time wasting and multifarious construction processes of the existing forms adopting form turnover and has high construction efficiency and good formed high pier appearance quality.

The invention discloses a bus stop site selection method based on GIS, and the method employs the ArcGIS network analysis technology, gives the consideration to the road congestion, road periodical passenger flow, population density nearby a road, road slope ratio and other factors, combines with the actual road slope data, the data of population density nearby the road, the road periodical passenger flow data and the road congestion data, and obtains a proper position of a bus stop based on the GIS technology. The method provided by the invention is effective, and is standard in stop site.

The invention provides a method for partition cross overlapping chromosome which relates to the medicine microimage image analysis field of digital medical treatment. The method includes steps as follows: firstly, describing line segment in a central region of the cross overlapping chromosome; secondly, calculating slope ratio of the line segment and normal slope ratio of the line segment and obtaining the calculated result; thirdly, measuring the line segment length according with the calculated result and confirming a partition point according with the measured result; fourthly, partition the cross overlap chromosome according with the partition point. The method provided by the invention judges the partition point based on the method for measuring the line segment length and processes chromosome partition according to this which can reduce difficulty and working amount of manpower partition, increase automatization degree for analyzing chromosome, and has simple arithmetic.

The present invention relates to electrochemical sensor strips and methods of determining the concentration of an analyte in a sample or improving the performance of a concentration determination. The electrochemical sensor strips may include at most 8 [Mu]g / mm of a mediator. The strips, the strip reagent layer, or the methods may provide for the determination of a concentration value having at least one of a stability bias of less than +-10% after storage at 50 DEG C for 4 weeks when compared to a comparison strip stored at 20 DEG C for 4 weeks, a hematocrit bias of less than +-10% for whole blood samples including from 20 to 60% hematocrit, and a intercept to slope ratio of at most 20 mg / dL. A method of increasing the performance of a quantitative analyte determination also is provided.

The invention discloses a controllable slope type microalgae cultivation system and a microalgae cultivation method thereof. The system mainly comprises a microalgae pretreatment tank, a controllable slope type self-flow automatic temperature raising microalgae cultivation device on which a heat absorption coating is coated, and a microalgae liquid collection and aftertreatment tank; the controllable slope type self-flow automatic temperature raising microalgae cultivation device is arranged on an inclined surface with the slope ratio of 1 to 5 percent; the heat absorption coating is coated on the inner walls of straight pipes and U-shaped pipes, which are near one side of the inclined surface; the straight pipes and the U-shaped pipes form the controllable slope type self-flow automatic temperature raising microalgae cultivation device; each U-shaped pipe is provided with a carbon dioxide air inlet; two ends of each straight pipe are provided with valves; each straight pipe is also provided with an oxygen discharging hole; the tail end of the controllable slope type self-flow automatic temperature raising microalgae cultivation device is provided with a flow controller; primary microalgae liquid in the pretreatment tank is led into the controllable slope type self-flow automatic temperature raising microalgae cultivation device, so microalgae is collected and cultivated for 12 to 24 hours periodically; the system can cultivate the microalgae on scales, has a simple basic structure, is easy to implement, and can meet the industrial cultivation requirement of the microalgae.

The invention relates to a horizontal construction joint dislocation repairing method for a concrete panel to improve safety and reliability of engineering operation. According to the technical scheme, the horizontal construction joint dislocation repairing method for the concrete panel is characterized by comprising the following steps that firstly, the damage range of the portions, on the periphery of a horizontal construction joint, of the concrete panel is determined; secondly, the portions, in the damage range, of the concrete panel are chiseled away; thirdly, deformed reinforcing steel bars are cut and repaired, the deformed reinforcing steel bars in the damage range are cut off, and replacement reinforcing steel bars are used for replacing the cut-off reinforcing steel bars; and fourthly, concrete panel backfilling is conducted, concrete is used for backfilling the chiseled area, and a repairing panel connecting an upper concrete panel body with a lower concrete panel body of the horizontal construction joint is formed, wherein the slope of the repairing panel is 1:K, K ranges from L-0.05 to L+0.05, and the designed slope ratio of a down slope of the original concrete panel is 1:L. The horizontal construction joint dislocation repairing method is suitable for similar engineering such as dislocation repairing treatment of horizontal construction joints of concrete panel rockfill dams.

The invention discloses a variable cross-section high pier turnover formwork structure and a construction method, relating to the field of bridge construction. The structure comprises a base carrier platform, a multi-section inner template system, a multi-section outer template system, a stiff skeleton and so on. The structure has the following characteristics that firstly, the pre-buried stiff skeleton of the variable cross-section high pier is calculated through multiple formulas, and maximum impact of a vibration rod is considered when the stiff skeleton resists wind and is concreted, so that the strength, rigidity and safety of the stiff skeleton are guaranteed; secondly, oriented by the stiff skeleton, multiple backridges are provided with scales at horizontal top surfaces of two ends, so as to control an installation fixing position at the top surface of an outer longitudinal template to position a slope ratio of a variable cross section accurately; and thirdly, a regulating boltis set to regulate the position of the outer longitudinal template, so as to improve the accuracy of the slope ratio of the currently casted template of a variable cross section pier body. The quality of the variable cross-section high pier is improved and construction security is ensured, effects of resource conservation, accelerated progress, energy conservation and emission reduction are achieved, and social benefits and economic benefits are remarkable.

Provided are a wide scope oxygen sensor aging monitoring system for a vehicle and a fault diagnosis method. An engine and a sensor executor, an ECU and a wide scope oxygen sensor intelligent driver chip and the like thereof are utilized, and aging monitoring is performed on a wide scope oxygen sensor. The ECU is responsible for detecting and determining aging faults of the wide scope oxygen sensor, utilizing forced oscillation to compare lambda signals and lambda reference signals actually collected from the wide scope oxygen sensor, a minimum slope ratio between the lambda signals and the lambda reference signals is compared, and whether the wide scope oxygen sensor has the aging faults is determined according to the slope ratio. The system can accurately detect the aging faults of the wide scope oxygen sensor and is applicable to all vehicles where the wide scope oxygen sensor is installed.

The invention provides grouting slurry for reinforcing the tunnel face of a jacking culvert of a fine-sand layer and a grouting method. When the jacking frame culvert is reinforced by a pipe curtain and the tunnel face needs to keep self-stabilization at certain slope ratio, the diluted water glass and prepared calcium chloride solution are sequentially adopted for horizontal grouting reinforcement by a modified perforated-pipe grouting technology; and the unconfined compressive strength of the reinforced soil body can reach 100-500kPa, and the slope ratio required by the blade feet of the jacking culvert can be realized. Compared with the reinforcement by chemical slurry and high-pressure jet grouting, the grouting method is safe and stable; compared with the reinforcement by superfine cement grouting, the spreading range is large, the strength after reinforcement can meet the requirement on slope ratio stability, the excavation is easy, the construction is convenient, and the construction cost is reduced by more than half; meanwhile, by adopting the grouting technology provided by the invention, sectional grouting can be realized, the pipeline is not blocked easily, and an aim of dominant permeation of slurry in the dense fine-sand layer is achieved; and a slurry plug is not arranged at the lower end but the upper part, the grouting range is expanded, and the grouting effect is relatively good.

The invention discloses a particulate body protecting structure for partial scouring of the head of a spur dike or a bridge pier and a construction method thereof. The protecting structure is mainly applied to protection of partial scouring of the head of the spur dike or the bridge pier. For protecting partial scouring of the bridge pier, the structure is an annular particulate body gravel layerlaid on the riverbed around the bridge pier; for protecting partial scouring of the head of the spur dike, the structure is a U-shaped annular particulate body gravel layer laid on the riverbed aroundthe spur dike. The particle size of gravel is multiple times the median size of incipient sediment under the flow condition encountered once twenty years locally. The construction method comprises the steps that 1, the construction position is determined under the tide stabilizing condition; 2, gravels are laid on the designated riverbed in sequence from the downstream part to the upstream part,wherein firstly, gravels of the range of 1.5-2.5 m are laid within the range of 0-6 m around the spur dike and the bridge pier, and then the periphery is paved on the basis of the slope ratio being 1:3. By means of the partial scouring mechanism of the head of the spur dike and the bridge pier, when a scouring pit of the head of the spur dike and the bridge pier is not balanced, the gravel layer of the certain thickness and range is laid around the spur dike and the bridge pier, and therefore partial scouring is well restrained.