80 results about "High arches" patented technology

The invention relates to a dam safety intelligent monitoring and pre-warning system based on full life circle and a method thereof, and belongs to the intelligent monitoring and pre-warning field of hydraulic and hydro-power engineering safety. By taking the full life circle of a high arch dam as a main line, a three-dimensional digital technology as a foundation and a building information model as a core, a full dam information model (DIM) including an overall three-dimensional structure of high arch dam concrete and foundation and construction process information are established, and an intelligent technology is applied by an intelligent high arch dam construction information platform for quality management and dynamic analysis control based on DIM development, so that the high arch dam construction such as application of essential data in the design period, full-process monitoring in the construction period and all-around monitoring and safety assessment and pre-warning analysis evaluation in the operation and management period of the high arch dam is realized, refine management and control on the high arch dam are realized, a foundation is provided for the safety management of the high arch dam, and safe operation in the whole life circle of the high arch dam is guaranteed.

The invention discloses a distributed fiber optic sensing technology and a system for monitoring of deformation of a high arch dam, which relate to the field of crossing of a dam safety monitoring technology and a fiber optic sensing technology and are used for overcoming the defect of a conventional means for the monitoring of the deformation of the high arch dam and filling the blank of using distributed fiber optic sensing for the monitoring of the deformation of a dome dam. Aiming at the characteristics and the difficulties of the dome dam, two kinds of unique curved fiber optic packaging structures, namely, fiber optic monitoring panels in a weakly curved beam type and a micro-bending beam type, are provided. Based on error analysis and curved beam height control-camber beam segmentation construction, excellent performance, high reliability, long service life, convenience and practicability of monitoring of fiber optic deformation are ensured. A convenient and practical layout installation mode in an arch dam and a gallery, a vertical shaft and a footrill of a dam foundation is provided, so that online remote metering on multi-dimensional and large-scale time-space broad coverage of three components (radial horizontal displacement, tangential horizontal displacement and vertical displacement) of internal deformation of the arch dam, the dam foundation and a dam abutment is realized. An optical demodulation instrument is multifunctional and can be used for metering concrete temperature, reservoir water temperature, slit level in front of a dam, reservoir sedimentation and the like.

The invention discloses a high-arch-dam construction progress real-time simulation method based on a coupling temperature field. A data mining method is introduced to real-time analysis and research of a high-arch-dam construction period concrete temperature field, a construction period concrete temperature field regression prediction model is established, and a construction period dam body concrete temperature field is solved; based on dam body concrete temperature information and construction progress information acquired in the field, high-arch-dam construction period dam body casting temperature probability distribution is analyzed; a support vector machine method is adopted to establish the construction period concrete temperature field regression prediction model, and the high-arch-dam construction period dam body concrete temperature field is calculated; based on the high-arch-dam construction progress real-time simulation mathematic model of the coupling temperature field, a coupling temperature field real-time analysis result and a construction progress real-time simulation system are coupled, and construction progress real-time simulation analysis is performed to obtain a construction scheme.

A shoe for enhancing the appearance of a wearer's arch, the shoe comprising an outer portion, and an instep portion, wherein said instep portion is shaped and positioned to create the illusion of a longer or higher arch. The invention includes an instep portion is made from an elastic material. Said instep portion is shaped longer and higher than the wearer's natural arch. Said instep portion is made of the same material as the rest of the shoe but further comprises a design or color to create an appearance of a shadow or is made from a material different in color or in composition from the rest of the shoe. The invention further comprises an arch support mechanism, said arch support mechanism proximate to the instep portion. The arch support mechanism comprises an elastic band stretching along the instep of the foot and / or an inner support layer made from an elastic material.

The invention discloses an extra-high arch dam deformation spatio-temporal series prediction method based on spatio-temporal integration. The method comprises following steps: as measured data alwayshas a random error item, when a dam sensor is used for monitoring data, a spatio-temporal process of the dam sensor is assumed to be decomposed into two parts: determinacy spatio-temporal change and small-scale random error change after the deterministic trend is removed, wherein the small-scale random error change after the deterministic trend is expected to be zero. A simple BP neural network isused for fitting a whole spatio-temporal trend; the residual item is acquired after the whole spatio-temporal trend is removed, the residual item is subjected to linear unbiased estimation, and a spatio-temporal Kriging method is selected for fitting a local spatio-temporal trend; a threshold circulation neural network is introduced to predict a time sequence of each measure point of the dam, a deformation value of the related measure point is predicted, the deformation value predicted by the threshold circulation neural network is compared with the deformation value predicted by the BP neural network, and if the predicted value of the threshold network is more accurate, the river direction displacement data after prediction is used as training data for optimizing the BP network.

The invention relates to a simulation method for a high arch dam construction. The simulation method comprises the steps of: a) collecting data used for reflecting the construction progress status; b) carrying out data reduction and data integration on the collected data; c) obtaining an incidence relation of data in a data warehouse by a Boolean type association rule mining algorithm based on a two-stage frequent itemset theory recurrence method; d) comparing the obtained inter-data incidence relation with data in a pouring decision rule base in a construction simulation system one by one to perfect the pouring decision rule base of a simulation system; and e) according to a construction determination type parameter, selecting a simulation system parameter by the incidence relation. According to the simulation method for a high arch dam construction, which is disclosed by the invention, a construction rule adaptive to the self characteristics of an engineering, a construction simulation parameter and an influence rule on the construction progress by various factors are obtained, the accuracy and the efficiency of the simulation system are obviously improved, and a guide function of the construction simulation system in high arch dam construction progress control is greatly reinforced.

The invention discloses a self-adaptive simulation method for a construction progress of a high arch dam. Self-adaptive updating of a construction progress simulation system for the high arch dam is realized by establishing a self-adaptive simulation mathematical model for the construction progress of the high arch dam, taking a field real-time construction state as the basis, and real-time updating of a simulation initial condition, simulation logic and a simulation construction parameter as the means, wherein real-time updating of the simulation initial condition is realized based on the practical construction progress of an engineering; according to a construction parameter acquired in a field in real time, real-time updating of the simulation construction parameter is realized by adopting a corrected Bayes updating method; and, in a simulation calculation process, on the basis of the real-time construction progress or the simulation calculation speed, real-time updating of dam block selection logic is carried out by adopting an entropy weight method. On the basis of the method, self-adaptive updating of the construction progress simulation model is realized; real-time tracking and analyzing of the construction progress simulation model on the field construction are ensured; and a reasonable construction scheme can be established according to the simulation analysis calculation.

A shoe that is convertible between a high heel mode and a low heel mode. There is a rigid shank that is adjustable along the longitudinal axis of the shoe between the various layers of the sole. The proximal end of the adjustable shank may be slid further under the metatarsophalangeal joints to accommodate the sweeping higher arch of a high-heeled shoe or the distal end of the adjustable shank may be slid closer to the back of the calcaneus bone to reduce the arch of the shoe. The different height heels are lockably affixed to the sole.

The invention discloses an arch dam safety evaluation method based on a geomechanical model comprehensive method testThe method comprises the following steps: S1, building a comprehensive method testsafety evaluation index system according to detected data; s2, constructing an abrupt change model for evaluating the safety degree of the arch dam; s3, standardizing each underlying index of the comprehensive method test, and converting the underlying indexes into dimensionless data between 0 and 1; s4, performing mutation level calculation by using a normalization formula, and solving a total mutation level value of the target layer; s5, repeating the steps S1-S4, respectively calculating arch dam safety total abrupt change level values under different overload coefficients in the comprehensive method test, drawing a relation curve graph of the total abrupt change level values and the overload coefficients, and obtaining a high arch dam comprehensive method test safety coefficient according to inflection points of the relation curve of the total abrupt change level values and the overload coefficients; and S6, evaluating the overall stability and safety of the arch dam project by integrating the factors. According to the invention, the existing deformation monitoring data in the model comprehensive method test is utilized to establish a comprehensive evaluation system for the safety degree of the high arch dam comprehensive method test.

The invention relates to a hydraulic engineering computer simulation technology and discloses a method for simulating the interference between the hoisting of a steel lining of a cable crane and the concrete pouring in the concrete construction process of a high arch dam. According to the method, the interference between the hoisting of the steel lining and the concrete pouring is abstracted into digital parameters which comprise machine hours of occupying the cable crane in the hoisting process, hoisting intervals, cable crane machine-position interference factors, intermission of mounting the steel lining on the bin surface and the like, and a digital model of the interference between the hoisting of the steel lining and the concrete pouring is established by the digital parameters, and thus, the interference phenomenon between the hoisting of the steel lining and the concrete pouring in a real construction system can be reflected by changing the values of the parameters and carrying out multi-scheme simulation and sensitivity analysis, so that the construction process of the steel lining is more accurately analyzed and forecast. The method is suitable for the building construction of the high arch dam.

The invention discloses an arch rib face internal multi-point restrained and distributed tied-arch bridge. A plurality of longitudinal beams connected with an arch rib are arranged below the arch rib, and thus a tie bar capable of resisting constant and live load action of the arch rib and balancing the horizontal thrust in a distributed mode is formed. Vertical stand columns and diagonal web members are arranged on the longitudinal beams and connected with the bottom face of the arch rib, an elastic restraint supporting system is formed in the surface of the arch rib, and thus the integral rigidity and strength of the arch rib are enhanced. Compared with a span arch bridge, the arch rib face internal multi-point restrained and distributed tied-arch bridge has smaller midspan arch rib bending moment and smaller arch springing horizontal thrust, has higher arch rib stability and higher stable bearing capability, and has smaller midspan deformation, and thus travel comfort is improved; in addition, the workload and cost for foundation construction are reduced.

The invention discloses a high-arch-dam flood discharge and energy dissipation structure of a narrow river valley and deep tail water. An upper-layer hole and a lower-layer hole are distributed on a dam body; two dams do not need to be arranged at the downstream of the dam to form a closed water cushion pool; and only a concrete apron and revetments at two banks need to be arranged. The upper-layer hole adopts combined outflow of an overlooking angle with a small angle and a depression angle with a small angle; and the lower-layer hole adopts narrow seam type outflow of a flat bottom angle, two-side shrinking and vertical dispersion, and discharged water flows of the upper-layer hole and the lower-layer hole are not collided in the air. The two paths are not arranged; and the outflow of the upper-layer hole is controlled to be the smaller angle so as to control the degree and the range of a drop point and atomization of a water tongue. According to the high-arch-dam flood discharge and energy dissipation structure, the characteristic of a water depth of a three-dimensional space dispersed energy dissipation and downstream energy dissipation region is sufficiently utilized, so that the structure form of an energy dissipation and protection facility is simplified, the damages and influences on an ecological environment and a side slope of a nodal region are reduced, the construction difficulty is reduced, and the engineering amount and the engineering investment are reduced; and therefore, good social benefits and economic benefits are obtained.

The invention discloses a complex foundation extra-high arch dam overall crack resistance design method, relates to the technical field of hydropower station arch dam design, and provides the complex foundation extra-high arch dam overall crack resistance design method. The method comprises the following steps that A, arch dam body shape design is conducted; B, the arch dam is analyzed by adopting an arch beam method, a linear elasticity finite element method, a nonlinear finite element method and a geomechanical model test method; numerical calculation and physical test results are comprehensively compared, and arch dam deformation, stress characteristics and the overall damage process are analyzed, judged and grasped, so that crack initiation points, crack weak links and reinforcement key objects and parts of arch dam damage are found out; the comprehensive influence of various factors influencing arch dam cracking on arch dam cracking is systematically analyzed; C, arch dam anti-cracking measures are designed in a targeted manner according to different cracking mechanisms of the anti-cracking weak area and the controllable cracking influence factors of the anti-cracking weak area; and D, the effect of the anti-cracking measure is evaluated by adopting a three-dimensional finite element equal numerical analysis method.

The invention discloses a layered multistrand noncollision effective dissipater structure used for the flood discharge of a high dam body in a gorge area which adopts surface spillway tail-flaring piers and deep hole narrow ridges to combine for flood discharge. The effective dissipater structure arranges a plurality of surface spillway tail-flaring piers on the top of a high arch dam; surface spillway flooding channels are arranged between neighboring tail-flaring piers so as to form a surface spillway longitudinal diffusing water flow; a plurality of deep hole narrow ridges are arranged at the one second or two third location of the height of the high arch dam; the jet flow outlets of the deep hole narrow ridges are staggered with the jet flows of the surface spillways. A straight section and a dispersing section are arranged between the tail and the head of the piers; the dispersing angle of the dispersing section relative to the straight section Theta is equal to arctan(b0-b) / 2l; in the relevant position coordinate between the crossing point A of the line of intersection of the straight section and the dispersing section and the flooding weir surface of the flooding channel, and the shaping design water head Hd of the flooding weir surface, Xi x is equal to x0Hd and Xi y is equal to y0Hd. The straight section and a shrinking section are arranged between the water flow inlet and the water flow outlet of the narrow ridges; the shrinking angle of the shrinking section relative to the straight section Beta is equal to 12 to 15 degrees; the ratio of the width d of the water flow outlet and the width D of the water flow inlet should meet 0.3 to 0.7.

The invention discloses a personalized control method for cantilever height of an ultra-high arch dam, and relates to a personalized control method for the cantilever height of a concrete arch dam by utilizing a three-dimensional numerical method for solving and guiding and considering the actual construction requirement. The personality characteristics of different arch dams, different dam sections of the same arch dam and different elevations of the same dam section are further considered on the basis of the prior art, so that personalized control over the cantilever height of the ultra-high arch dam is realized by a three-dimensional finite element method. By the control method, the construction progress is accelerated, so that the construction period of the high dam is further shortened, and key objectives such as dam body water blocking and flood protection and expected power generation are achieved on schedule.

The invention discloses a temperature control anti-cracking method for a large-volume hydraulic concrete for a super high arch dam. According to the method, the concrete out-of-mixer temperature and the concreting temperature are controlled by pre-cooling aggregate, and adding flake ice and cold water; low-heat cement and highly-doped grade I coal ash are taken as a cementing material; cooling water pipes are buried and water is introduced to reduce the maximum temperature of the hydraulic concrete; grade-4 aggregate and PVA (Polyvinyl Acetate) fibers are adopted to prevent cracks. The purposes of controlling the hydraulic concrete out-of-mixer temperature to be lower than or equal to 7 DEG C in summer and lower than or equal to 9 DEG C in winter, the concreting temperature to be lower than or equal to 12 DEG C, and the maximum temperature to be lower than or equal to 27 DEG C are achieved. By actual application of the temperature control anti-cracking method for the large-volume hydraulic concrete to the super high arch dam, the maximum temperature is remarkably reduced, and cracks are not found on site.

The invention relates to the technical field of dam operation safety monitoring and management, in particular to a dam and foundation elastic modulus dynamic inversion method based on prototype vibration response. The method comprises: based on actual measurement vibration response of a dam prototype, a random subspace method based on singular entropy order determination is adopted to identify working modal parameters of a dam in the operation period, a response surface model between a high arch dam and foundation subarea elastic modes and modal parameters is constructed based on the responsesurface theory, and the response surface model is used for replacing a finite element model; based on modal parameters of prototype actual measurement response recognition and modal parameters calculated by a response surface model, an optimal mathematical model of dam and foundation subarea elastic mode dynamic inversion is established, the mathematical model is subjected to optimization solvingby adopting a genetic algorithm, and an optimal combination of elastic modes of all subareas is obtained through inversion; The method provides a brand new idea for inversion of the running period damand the foundation subarea elastic model.

The invention discloses a flow channel outlet structure, particularly relates to the flow channel outlet structure of a flood discharge surface hole of a high arch dam, and belongs to the technical field of civil design construction. The flow channel outlet structure is capable of forming nappe which is fully stretched in a longitudinal direction and has a stable flow state in a transverse direction. The flow channel outlet structure comprises a flood discharge flow channel with a bottom plate formed by an arch dam and a side wall formed by a dam pier, wherein the side wall is linearly shrunk inwards in the longitudinal direction and the tail end of the bottom plate is positioned on the inner side at the tail end of the side wall.

The invention discloses a flood discharge hole opening multi-layer asymmetric arrangement method suitable for high arch dams, and belongs to the field of water conservancy and flood discharge architectures. The overlapping of trajectory nappes in the narrow space can be effectively avoided through the asymmetric arrangement of surface outlets and the asymmetric arrangement of deep hole planes. When the surface outlets are combined with the deep holes to discharge the flood, collision angles of each nappe in the air are reasonable, the surface outlet large or medium depression angle nappes collide with the deep hole small depression angle nappes, the surface outlet small depression angle nappes collide with the deep hole small jet angle nappes, the surface outlet small jet angle nappes collide with deep hole large jet angle nappes, the collision angles of the nappes in the air are in the range of 35-65 degrees, the collision angles are reasonable, and the nappes can be effectively dispersed.

The invention belongs to the technical field of engineering management, and discloses an optimization decision-making method for concrete transportation queuing networks during high arch dam engineering construction. The concrete transportation queuing networks can be dynamically optimized by the aid of the optimization decision-making method during high arch dam construction. The method includes steps of A, describing relevant uncertain parameters by the aid of fuzzy random numbers; B, computing system state transition probabilities of the transportation networks; C, building multi-objective and multistage decision-making optimization models; D, equivalently transforming the models to form solvable multistage decision-making optimization models; E, solving the models by the aid of particle swarm optimization algorithms on the basis of paired processes. The optimization decision-making method has the advantage of applicability to improving the construction efficiency and reducing the running cost during high arch dam engineering construction.

The invention relates to a device for testing bending properties of a monofilament. The device comprises a rack, wherein the rack is provided with a groove perpendicular to a horizontal plane; a platform is arranged in the groove; a test sample fixing mold is mounted on the platform; a presser foot is fixed above the groove and connected with a pressure sensor; when the platform moves up along the groove, the highest arch point of a test sample fixed on the test sample fixing mold is in contact extrusion with the presser foot to ensure that the pressure sensor measures a pressure; the pressure sensor is connected with a computer, and the computer is connected with the platform through an alternating current servo driving system. The invention also relates to a test method of the test device. The device and the method provided by the invention have the advantages of straight and accurate data, reasonable and easily-operated method, and wide test objects.

The invention discloses a numerical simulation method suitable for valley width deformation of a high arch dam. The method comprises the following steps of firstly, the stratum information of a dam area is acquired, the landform and rock stratum distribution information is determined, and a geometric model of the dam area is established; secondly, an embedded discrete fracture model is establishedfor a discontinuous structural surface, and mesh generation is conducted on the geometric model by adopting orthogonal meshes; then piecewise linear fitting is conducted on the water storage processline, and the dynamic application process of the water load is determined; correcting the physical and mechanical parameters of the weak structural surface on the basis of considering the degradationeffect of water on the rock mass material; and finally, joint solution of embedded discrete cracks and an extended finite element model is carried out on the water storage process, and simulation of valley width deformation of the high arch dam in the water storage period is achieved. The method is advantaged in that the forms of the fault and the dislocation zone do not need to be considered during mesh generation, so complexity during mesh generation is greatly reduced; and secondly, generation of valley deformation of the high arch dam in the water storage period can be effectively simulated from the perspective of structural surface deformation.

The invention provides a finite-element-simulation solar ray shading computing method. On the basis of the traditional shading algorithm, combined with the characteristics of the finite element algorithm, whether light rays which are emitted by finite element nodes and are same as angles of solar rays and are opposite to the direction of the solar rays are shaded by buildings or not is judged withthe screening excluding method, thus whether all the finite element nodes on the surfaces of a finite element model are irradiated by the sun or not is computed, it is achieved that judgment is carried out with the vector basic characteristic judgment method, the coordinate value correlation method and the area method in sequence, and whether all the surfaces of the finite element model are shading faces or not is screened. According to the finite-element-simulation solar ray shading computing method, finite element grids are fully combined, particularly, characteristics of high-arch-dam temperature control and crack prevention model grids are fully combined, the influence of solar radiation can be rapidly solved, the algorithm is easily achieved, computing is efficient, and the practicability is high; the finite-element-simulation solar ray shading computing method is applied to correlation computation of practical engineering, simulation computation is accurate, and the finite-element-simulation solar ray shading computing method can provide a scientific and reasonable data supporting basis for engineering application.

The invention relates to the diversion optimization design technology of construction of hydraulic and hydroelectric engineering and discloses an optimization design method of a diversion tunnel of ahigh arch dam, which features that the investment of diversion project is reduce, the construction period is shortened and the safety of flood season is ensured. The method includes the following steps: a, constructing a mathematical model of diversion tunnel size optimization design of high arch dam; b, initially setting that size of the diversion tunnel of the high arch dam; c, obtaining that dynamic simulation results of the whole dam body of the high arch dam in each month and the joint grout elevation; d, adjusting and optimizing the diversion tunnel size of high arch dam. The high arch dam diversion tunnel size optimization design scheme of the invention reduces the investment of the diversion project, shortens the project time limit, and is suitable for the high arch dam hydropowerproject.

The invention relates to an excavation construction method for a weak disturbed belt at a foundation of a super-high arch dam, and aims to anchor deep parts of the weak disturbed belt in advance, control the shear deformation, enable the foundation excavation to be carried out in order, and guarantee the project quality and period through exposing the ordered combination application of reinforcement measures and bench excavation during the former excavation process of the weak disturbed belt. The technical scheme lies in that the excavation construction method for the weak disturbed belt at the foundation of the super-high arch dam is characterized by comprising the steps of firstly, determining the relationship between a shear deformation value of the weak disturbed belt and top covering rockmass excavation according to a finite element analysis result; when excavating to the parts at the starting and ending elevations of the deep part anchoring, controlling the bench anchor rope construction to end, removing reserved rock ballast of a next bench through excavation, and carrying out excavation of rockmass at the front edge of the next bench; and carrying out synchronous circulation falling till the weak disturbed belt is exposed through excavation while all anchor ropes are anchored. The excavation construction method is applicable to the super-high arch dam of which the dam foundation has the weak disturbed belt.

The invention belongs to the technical field of water conservancy projects, and particularly relates to an ultrahigh arch dam foundation pit backfilling method. The method comprises the steps that thedam face of the extra-high arch dam is inspected, a foundation pit backfill area is partitioned and layered, foundation pit backfill materials, backfill elevation and backfill opportunities are preliminarily selected, and i foundation pit backfill schemes are determined; analyzing and comparing the seepage reduction effect, the heat preservation effect, the static load effect and the dynamic loadeffect of the i foundation pit backfill schemes; and an optimal elevation and a backfill opportunity are determined according to a comparison result, and an optimal foundation pit backfill scheme isselected. The method has the beneficial effects that the foundation pit backfilling method can reinforce bed rock cracks and enhance the seepage-proofing capacity of the dam; the dam body contact surface heat exchange coefficient is reduced, the dam surface heat preservation effect is improved, and temperature control and cracking prevention are facilitated; and the anti-seismic stability of the dam and the dam-foundation overall working performance in the construction period are improved.

A removable cover assembly to provide or extend shading or precipitation coverage that can be mounted to a plurality of locations, including a fence or the rod holders of a boat. The cover assembly is collapsible for portability and ease of storage. The cover assembly further includes a cover unit mounted to the collapsible frame in a manner that creates a high arch to maximize airflow, shade, and clearance underneath the cover assembly. The entire present invention can be stored and transported in a slim storage assembly.

The invention discloses a high arch dam concrete temperature state interval predicting and early warning method. The high arch dam concrete temperature state interval predicting and early warning method comprises the following steps: first, establishing a temperature dynamic prediction model, and performing rolling prediction on the temperature of concrete in a pouring silo in the next few days via the temperature dynamic prediction model; second, determining an upper value and a lower value of a dual-control early warning index in a typical age in a first-stage temperature control period of the concrete to obtain a temperature state early warning interval according to the temperature change law of the concrete in a poured silo; third, establishing a classification early warning mechanismaccording to the constrained characteristics of different dam sections, the temperature variation characteristics of a dam site area and the concrete temperature state change characteristics; and fourth, judging a temperature state warning level through the classification early warning mechanism according to a prediction result and the early warning interval, and taking corresponding response measures to realize dynamic correction of a temperature control measure. The technology provided by the invention solves the problem of insufficient objectivity and timeliness of the existing concrete temperature early warning method; a high arch dam concrete temperature state interval early warning method is provided; and process early warning of the first-stage temperature control period in which the temperature changes most drastically is realized.