134results about "Arch dams" patented technology

The invention belongs to the technical field of dam abutment slopes, and relates to an arch dam abutment slope stability judgment method based on three-dimensional visualization. By improving and enriching an existing method, and combining a secondary development technology of Civil 3D, the computation process of an arch dam abutment slop stability is visual and controllable, the computing result is accurate and reliable and more approximate to the engineering practice, and the security risk of engineering design can be avoided to a greater extent. Besides, three-dimensional visualization development can be performed by taking a computer as a platform, and the computation process elements can be visual, modularized and automatic. The judgment method provided by the invention is convenient and efficient, the result is efficient and reliable and the technology is advanced; moreover, the judgment method has a more accurate true situation of the arch dam abutment slop stability, and is more conducive to the improvement of the safety and efficiency of the engineering design.

The invention relates to a steel dam space truss structure unit body and an arch-style steel dam. The unit body is a hexahedral space truss structural body with a front end surface and a rear end surface in key pattern structures and other lateral surfaces in a stud link chain structure, connecting rods are respectively arranged between a central node O of the front end surface and other nodes, supporting connecting rods are respectively arranged between four middle nodes A,B,C and D of the front end surface and four vertexes of the rear end surface, and supporting connecting rods are respectively arranged between a central node O' of the rear end surface and the four vertexes of the rear end surface. The steel dam, which is a space truss structure with a curve upstream surface, is formed by combining the space truss structure unit bodies, an eliminator is fixed on the curve upstream surface, the bam bottom of the steel dam is fixed with a reinforced concrete bearing platform, and both sides of the steel dam are respectively fixed with the stepped bearing platform formed by reinforced concrete structures at both banks. The steel dam is kept stable mainly by the counteraction of arc ends at both banks and has strong overload capacity, high degree of safety and engineering investment saving.

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 relates to a deformation-based real-time safety monitoring threshold determination method in an arch dam running period. The deformation-based real-time safety monitoring threshold determination method comprises the steps of building a mesh model for reflecting structure main characteristic; performing deformation value separation to obtain a water pressure deformation component; reflecting a dam structure material parameter; performing full-dam full-process simulation analysis, forecasting and developing dam deformation under conditions of a water level, a temperature, dam shoulder and creep within a certain time; performing water level, temperature, dam shoulder deformation and creep single factor deformation influence analysis by simulation analysis to obtain a deformationdevelopment rule; obtaining dam deformation under an actual condition by an interpolation algorithm according to the actual water level, the temperature, the dam shoulder deformation and the creep and by developing the water level, the temperature, the dam shoulder deformation and the creep; determining a deformation allowable fluctuation range according to monitoring and calculation deformation;and finally, obtaining the real-time deformation monitoring threshold. By the deformation-based real-time safety monitoring threshold determination method, the dam deformation is accurately forecasted, favorable explanation of a physical mechanism is achieved, meanwhile, the real-time dynamic change of an index is monitored, and real-time and accurate monitoring can be achieved.

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 concrete material taking platform and an anti-collision damping device. The concrete material taking platform comprises a discharging platform. One side of the discharging platform is provided with a bucket platform; the discharging platform and the bucket platform are all a section of extension platform arranged along a side slope; the side face of the discharging platform, which faces the bucket platform, is provided with the anti-collision damping device; the anti-collision damping device is divided into a plurality of units, and is arranged along the discharging platform. The anti-collision damping device is characterized in that the back face of a panel is welded to a plurality of slide bars; a screw is welded to the end of each slide bar; a BeiLei beam is also provided with a plurality of slide bushings corresponding to the slide bars; the slide bars respectively pass through corresponding cushion pads, support frames, slide bushings and springs in sequence and are connected with nuts. According to the concrete material taking platform and the anti-collision damping device disclosed by the invention, by the arranged panel, cushion pads and slide bars, the impact of a bucket to the material taking platform can be effectively relieved. The construction cost of the material taking platform is further reduced. As the movable damping device is adopted by the concrete material taking platform disclosed by the invention, and the damping allowance is big, the damping device is not easy to damage, and therefore, the service life is prolonged, and the maintenance cost is reduced.

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 an integral U-shaped anchor rope embedded duct and a mounting method thereof. The embedded duct comprises a U-shaped pipeline, a plurality of steel strands, a plurality of isolating rings and a plurality of supports, the supports are fixedly embedded into a concrete foundation, the U-shaped pipeline is fixed onto the supports, the isolating rings are uniformly arranged in the U-shaped pipeline at intervals, and the steel strands sequentially penetrate all the isolating rings and are mutually isolated by the isolating rings. The embedded duct is simple in structure, prestress is uniformly distributed, and construction quality can be effectively improved. The mounting method includes the steps: 1) mounting a rope penetrating duct; 2) feeding and winding the steel strands; 3) enabling bundled ends of the steel strands to penetrate into a comb hole device and the isolating rings; 4) connecting a guider with a pulling rope; 5) penetrating the rope; 6) performing measuring, adjusting and positioning.

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 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 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.

The invention relates to a combined multi-arch type steel-structure dam, which comprises a reinforced concrete cushion cap and a pre-embedded fixed part at the dam bottom and reinforced concrete structured side piers and the pre-embedded fixed part on the two banks, wherein the steel-structural dam main body comprises a box type arch-shaped supporting main body and n small-span arch-shaped supporting panels which are fixed on a convex water-ward face of the arch-shaped supporting main body; and the arch-shaped supporting main body is an assembly which divided into n small arch-shaped supports which are formed by fixing box type small arch-shaped units A with rectangular sections and box type small arc-shaped units B with triangular sections. The combined multi-arch type steel-structure dam has the advantages that: the steel-structure dam is mainly stabilized under the counter-force action of the arch ends on the two banks, a plurality of small-span arch rings which are continuously arranged on the water-ward face ensure that the load on the dam body is uniformly transmitted to the arch-shaped supporting main body which is arranged behind the panel and has a box girder structure and then transmitted to the two banks and the foundation, so the load distribution is more rational; the dam body is light and tough, highly elastic and high in shock resistance; and the materials for building the dam are green and environmentally-friendly and can be recycled, the industrial manufacturing and installation are easily realized and the project process can be accelerated.

The invention discloses an arch grate type reinforced concrete debris flow stop dam and a construction method thereof. The stop dam comprises a plurality of stop main arch rings, vertical connecting beams and arch foot foundations on the two banks of a channel. The two ends of the stop main arch rings are fixedly connected with the arch foot foundations correspondingly. A plurality of grate boxesare defined by every two adjacent stop main arch rings and every two adjacent stop arch vertical connecting beams, and a stop dam face is formed. According to the construction method, a foundation isexcavated, the bottom layer stop main arch rings, the arch foot foundations, the stop arch vertical connecting beams and the rest of stop main arch rings are sequentially constructed, and the arch grate type reinforced concrete debris flow stop dam is formed. According to the type of stop dam, original debris flow impact force perpendicular to a dam body is decomposed into pressure stress in the main arch ring direction, finally, the pressure stress is transmitted into rock soil bodies on the two banks of the channel, the anti-shear effect of a traditional stop dam is improved, a very good mechanics effect is achieved, and the integral stability, debris flow impact force resisting performance and anti-shear performance are improved; and an overflow port is not arranged, and the beneficialeffects that the structure is simple, safety and reliability are achieved, materials are saved, and cost is reduced are achieved.

The invention discloses an arrangement structure of overflow surface holes of an arch dam. The arrangement structure comprises two middle piers arranged on the overflow surface of the arch dam at an interval, and two side piers arranged on the outer sides of the two middle piers at an interval respectively; each of an overflow middle hole and two overflow side holes consists an overflow section and an outlet section; the side walls of the side piers, positioned at the outlet sections of the overflow side holes are inclined for 4-5 degrees towards the corresponding middle lines of the side piers from the upstream to the downstream; the side walls of the two middle piers , positioned at the outlet section of the overflow middle hole, are inclined for 7-8 degrees towards the corresponding middle lines of the middle piers from the upstream to the downstream; and the overflow surface structure of each overflow side hole is as follows from the upstream to the downstream: the curve of a weir surface is a power curve, the upstream of the origin of the power curve is an elliptic curve, the power curve is tangent to a straight-line segment inclined downwards, and the lower end of the straight-line segment extends to the outlet tail end of the overflow side holes and is connected with a horizontal bucklet lip through an arc transition section. On the premise of meeting energy dissipation of outlets of the overflow surface holes of the arm dam, the arrangement structure can alleviate or avoid washout on a downstream side slope or sidewall.

The invention relates to an arch dam construction control method, and belongs to the field of water conservancy and hydropower, in particular to an arch dam pouring block construction control method. According to the technical problems, the arch dam pouring block construction control method can fast and accurately determine space parameters of arch dam pouring blocks, so that arch dam structural construction is completed. The arch dam pouring block construction control method comprises the following steps that a, firstly arch dam shape parameter curve fitting is carried out; b, secondly, arch dam shape coordinate calculation is carried out; c, a coordinate formula of an intersection of a lead straight surface and upstream surface and downstream surface of an arch ring is established; d, the lowest point coordinates of the upstream surface of the lead straight surface after corner cut of the upstream surface are calculated; and e, finally by using the parameters obtained through the steps, the parameters are converted to a CAD graph through a DXF file, a plane graph, a radial profile graph and an arch dam three-dimensional shape graph of arch dam pouring block points are obtained, and construction operation is carried out through obtained structural information. The arch dam pouring block construction control method is especially suitable for water and electricity large dam arch dam pouring block construction.

The present disclosure provides an artificial retaining dam of coal mine underground reservoir. The artificial retaining dam (30) is embedded into a security coal pillar (2) and surrounding rock (3) around an auxiliary roadway (1), the cross section of the artificial retaining dam (30) is an arc, and a concave of the arc artificial retaining dam (30) faces the underground reservoir. The disclosure also disclosed a method for connecting a security coal pillar, surrounding rock, and an artificial retaining dam for a coal mine underground reservoir. The retaining dam improves sliding-resistant performance of an artificial retaining dam, and can effectively cushion the impact to the dam bodies due to suddenly increased water pressure.

The invention provides a 1676 mm and 1000 mm double-rail-distance mixed gage turnout. The 1676 mm and 1000 mm double-rail-distance mixed gage turnout is mainly composed of a strip switch and a stiff frog. The strip switch comprises three fixed basic rails and three linked point rails. The three basic rails are the 1676 mm straight-strand basic rail, the 1000 mm straight-strand basic rail and the common curve-strand basic rail; and the three point rails are the 1676 mm curve point rail, the 1000 mm curve point rail and the common linear point rail. The stiff frog is mainly composed of a bidirectional blunt angle frog, the first acute angle frog and the second acute angle frog. A line overlapping scheme is provided for 1676 mm width rails and 1000 mm meter gage rails, and in the situation that the space is confined and guardrails cannot be arranged, bidirectional blunt angle frogs with a self protection function are designed.