238 results about "Arch dam" patented technology

A system for air dam actuation of a vehicle is provided having an object sensor, an air dam, an actuation mechanism, and a control module. The object sensor is for tracking external objects located in front of the vehicle. The air dam has a deployed position and a non-deployed position. The actuation mechanism is connected to the air dam, and actuates the air dam between the deployed and the non-deployed position. The control module is in communication with the object sensor and the actuation mechanism. The control module includes logic for monitoring the object sensor for a set of object data. The set of object data is data indicating if an external object is located in front of the vehicle.

The invention discloses a teaching model for construction of an earth and rockfill dam. The earth and rockfill dam has a clay core and is constructed by filling and laminating earth and rockfill layer by layer, clay masonry is substituted by bricks within 60cm of the outline of the earth dam, two sides of the cross section of the earth and rockfill dam are supported by channel steel 6.3, pulled and fixed by round steel phi20 and enclosed by toughened glass with the thickness of 8mm; the earth and rockfill dam comprises an earth and rockfill dam top, a dam body seepage-proofing body, a drainage facility, a protective slope and dam slope drainage facility and a visiting passageway, wherein a standard traffic road is built on the earth and rockfill dam top, border stones and drainage ditchesare arranged on the downstream side of the earth and rockfill dam top; rock mounds and the drainage ditches are arranged at the foot of the earth and rockfill dam to constitute the drainage facility;a dry stone pitching is arranged on the upstream face of the dam body of the earth and rockfill dam, and a turf protective slope provided with concrete meshes is arranged on the downstream slope of the dam body of the earth and rockfill dam; and the visiting passageway is arranged in a laboratory. According to the invention, field teaching and actual practices are combined to make the shortage ofthe work site practice outside schools.

This invention discloses a symmetrical close laser arch dam monitoring method, which comprises the following: to divide an arch dam into several linear sections; to analyze relative displacements between each small section; to get a general arch situation of whole arch dam through a known end; to get absolute displacement and inclination angle of each dam section through math model; to achieve self-adapting correction effect through bi-direction monitoring by use of symmetrical monitoring system and to realize the six-dimension parameter automatic monitoring with high accuracy.

The invention provides an automatic monitoring system for a grouted rubble arch dam. The automatic monitoring system comprises a data acquisition module, a data center library module and an arch dam safety monitoring, analyzing and early warning module. The data acquisition module comprises a water level sensor, a temperature sensor and a dam body radial displacement monitoring module; the data center library module is used for storing historical data generated by the data acquisition module and the arch dam safety monitoring, analyzing and early warning module; and the arch dam safety monitoring, analyzing and early warning module performs threshold judgment on the monitoring data transmitted by the data acquisition module through a multiple linear regression method and/or an LSTM methodand/or a Gaussian process regression method and/or a convolutional neural network method so as to determine whether early warning information is sent or not. According to the method, a dam safety inversion model and a prediction and evaluation early warning system of the grouted rubble arch dam are provided, the structure checking time can be pushed to the second-level response through the application of an artificial intelligence method, and a new path is opened up for real-time safety evaluation and prediction early warning analysis of the dam.

The invention relates to an arch dam construction period deformation field dynamic fitting analysis method based on BIM (building information modeling). The method includes the steps: projecting a dam section grid model and a measuring point space point cloud model by a central divergence projection algorithm according to structural characteristics and deformation measuring points of an arch dam to form a projected plane; fitting deformation field data by a butterfly difference interpolation fitting algorithm based on a projected plane model and a measured value distribution model based on a projected structure, and mapping fitted deformation value sequences to three-dimensional grid model nodes of an arch dam structure in a one-to-one corresponding manner; building a post-processing analysis window and generating and visually displaying a cloud chart, a displacement diagram and contour lines of model data. According to the arch dam construction period deformation field dynamic fitting analysis method based on BIM, construction progress and deformation monitoring data real-time driving arch dam deformation field data can be visually expressed.

The invention relates to a high-mountain narrow-valley arch dam foundation segmented and staged grouting method, and belongs to a foundation treatment method of a rock surface of a high steep bank slope foundation of a high-mountain narrow-valley arch dam foundation. The high-mountain narrow-valley arch dam foundation segmented and staged grouting method comprises the following steps: carrying out consolidation grouting and drilling after acceptance of excavation of the arch dam foundation; carrying out first-stage consolidation on the inside of a consolidation grouting hole; drilling a residual contact segment by the distance of 1 m with a phi 75 mm drilling sleeve after first-stage consolidation grouting is finished; burying a grouting system; pouring dam body concrete after first-stage consolidation grouting is finished; after joint grouting of a dam body is finished or while joint grouting of the dam body is carried out, carrying out second-stage consolidation on a consolidation grouting contact segment of the dam foundation. Consolidation of a bed rock contact segment and contact grouting are combined together, meanwhile, effects of contact segment consolidation and contact grouting are achieved, the work amount of the contact grouting system is reduced, the construction period is shortened, a construction technology is simplified, foundation treatment purposes of a high steep bank slope of the dam foundation of simplicity and convenience in construction, reliable technology, economy and reasonableness of grouting treatment of the high steep bank slope are achieved, and the problems encountered in foundation treatment of a dam segment of a bank slope are solved.

The invention discloses a dam abutment safety coefficient calculation method based on a full structural surface yield method. The calculation method includes the steps that firstly, a finite element model is established, and initial stress calculation and static force response analysis are conducted; secondly, the yield area percentage of the safety coefficient and the structural surface is obtained, a structural surface yield area percentage-safety coefficient curve graph is drawn with the yield area percentage as the vertical coordinate, and then the stability of a dam abutment of an arch dam is analyzed. The solving method using the full structural surface yield analysis method reflects the damage condition of the structural surface more accurately and visually, the influence of human factors on the value of the safety coefficient is avoided, the actual working state of the dam abutment is truly reflected, and the stability and safety evaluation of the dam abutment of the arch dam is more reasonable.

The invention discloses monitoring system and method of an arch dam, relating to the technical field of automatic monitoring of sluicing building structures in hydraulic and hydropower engineering. In the invention, a horizontal vibration displacement sensor is arranged on the arch dam; various working states of the arch dam can be monitored by analyzing a frequency spectrogram; the damage of the arch dam, which is possible to generate, is found in time; and the position of the damage is fast found so as to be convenient to repair and strengthen by adopting various engineering measures. The monitoring system has the advantages of simple form, convenient construction, easy maintenance, low engineering construction cost and convenient operation and management and can realize the remote control during operation. The invention reduces the interference by using the horizontal vibration displacement sensor, enhances the monitoring accuracy and meets the requirements of practical application.

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 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.

A method for identifying the cross joint state during an arch dam construction period is a method which adopts an opening monitoring value of a cross joint meter to identify the cross joint state during the arch dam construction period according to a series of criterions, and relates to the technical guidance of arch dam cross joint construction. According to the method, all criterion threshold values are preset according to engineering data statistical analysis, engineering experience and the like, the cross joint meter is used to monitor the opening of a cross joint in real time, and the correlation indexes are calculated according to the criterions for identifying the cross joint state. The method has the characteristics of simple and easily understood criterions, accurate judging and simplicity for operation, has an obvious effect on real-timely and accurately mastering the cross joint real working state during the arc dam construction period, and can provide effective basis for opportunity selection, cross joint surface treatment and other strategies when grouting is carried out.

The invention discloses an arch dam monitoring system applied to water conservancy and water power engineering. The arch dam monitoring system comprises a video collection device, a signal transmission device and a computer monitoring center; the video collection device is used for collecting video images of important positions of an arch dam, the video images collected via the video collection device are transmitted to the computer monitoring center via the signal transmission device, the video images are processed via the computer monitoring center, vibration displacement curves of different positions can be obtained, and the arch dam can be monitored via analysis of the vibration displacement curves. The beneficial effects of the arch dam monitoring system are that damage that can be caused to the arch dam can be timely found out, damage positions can be rapidly discovered, and therefore various kinds of engineering measures can be taken for restoration and reinforcement; the system is characterized by simple form, convenience of construction, easy-to-maintain property, low project construction cost, convenience of operation and management and easy-to-change video collection device.

The present invention relates to rolled concente arch dam artificial short seam structure, which includes artificial folding seam set on left and right dam shoulder of rolled concrete arch dam; water stopping, water draining and grouting systems are set water stopping, water draining and grouting systems are set in the seam, seam end has anticracking material; arch crown at down stream of arch dam is set ortificial radial short seam, seam end has anticracking material. The present invention can effectively release temperature stress of large surface rolled concrete during dam construction, temperature drop tensile stress of arch dam during operation and water load tensile stressk, if grouting is applied to dam shoulder artificial folding seam at the end of construction, it can improve the stability of dam seat.

The invention relates to a method for quickly constructing arch dam with external doping MgO micro-expand concrete, wherein it comprises: (1), preparing materials; (2), mixing MgO, sand, cement and powder coal as 4-6% of whole weight; (3) externally doping MgO concrete; it quickly continuously pours concrete, uses step rolling, and cycled method, while the layer height of dam is controlled between 2.5-3m, and the cycle time of each layer is 5-7 days, each layer has 5-6 steps, and the thickness of laid material is 30-50cm; it uses high-frequency vibrator, via step method to continuously pour, while the connect surface is 45-60degress incline, and the width of bar band is 2-3m.

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 relates to the technical field of dam abutment slopes and mainly relates to a determination method for different geological interface calculation parameters of sliding blocks of an arch dam abutment. The method comprises the steps of modeling, geological interface establishment, zoning, weighting calculation and the like. According to the method, a lithological distribution state of a structural surface is determined with a more accurate method in a spatial modeling mode, so that the values of the calculation parameters are closer to engineering practice, the problem that a calculation result of dam abutment slope stability analysis is not ideal due to the fact that a conventional calculation method cannot consider lithological distribution of each sliding surface and then proper structural surface calculation parameters cannot be accurately selected and used to perform calculation is solved, and the safety risk of engineering design is avoided to a larger extent.

The invention relates to the parameter acquiring technology of arch dam design and discloses a deformation-equivalence based automatic comprehensive deformation modulus calculating method for arch-dam foundations with an aim to solve problems about high error rate, low efficiency and difficulty in checking due to a manual modeling mode in the traditional technology. The method includes A), determining the scopes of models according to arch abutment positions, performing searching in a mode that deformation tends to be stable and restrain through comparison of different scopes of the models on influence of arch abutment displacement, and determining the comprehensive deformation modulus finite element standardization model; B), based on the comprehensive deformation modulus finite element standardization model, through comparison of different arch abutment section numbers on influence of the arch abutment deformation, and searching in the mode the deformation tends to be stable and restrain, determining the minimum arch abutment section numbers meeting requirements, and performing meshing on model units; C), acquiring unit parameters of composite materials in the models in an area-weighted calculation mode; D), automatically calculating the comprehensive deformation modulus. The method is applied to design of the arch dams.

The invention discloses a steel tube arched concrete dam which is characterized in that a plurality of arched steel tubes are overlapped into an arched dam; ventilation holes are reserved in the middle of arched steel tubes; concrete is filled in the arched steel tubes; arched leg bottom steel plates are welded at two ends of the arched steel tubes and are arched with rock; and concrete protective layers are cast around the steel tubes. The construction method comprises the following steps of: prefabricating the steel tubes by a factory in section and reserving the ventilation holes in the middle of the steel tubes; forming an integral arch by welding on the construction filed and then hoisting the integral arch to a plane at the dam bottom to form a first path of steel tube arch; filling concrete at one side of the steel tube arch and finishing the filling until the concrete is poured out from the other side to form steel tube concrete; welding the steel tubes and the arched leg bottom steel tubes arched on the rock; overlapping the steel tubes layer by layer by using the same construction method to the design elevation of a top surface of a dam body; and casting concrete protective layers at two sides of the steel tubes. The invention bears a main load by using the arched steel tube concrete overlapped to the design elevation from the dam bottom as an arch body according to the forced characteristics of the steel tube concrete, thereby greatly reducing the dam top section, further saving the material consumption, reducing the hydration heat, and being convenient to construct.