189 results about "Aqueduct" patented technology

The invention relates to the technical field of disaster prevention and reduction of civil engineering, in particular to an aqueduct earthquake resistance and disaster reduction system and method based on digital twinning, and the system comprises a data collection module, an earthquake early warning module, a control system, a gate valve control module, a notification module, a 3D visualization module and an aqueduct post-earthquake evaluation module. Through joint detection of the earthquake early warning module and the slave acquisition module, real-time acquisition of aqueduct operation state information and earthquake early warning information is realized, and before destructive earthquake waves arrive, the water quantity in the aqueduct is adjusted through the control module, so that the earthquake response of the aqueduct is minimum. By inputting monitoring data, manual inspection data and earthquake characteristic information into a control system, constructing an aqueduct digital twin model and performing earthquake response simulation, the safety state of the aqueduct structure after the earthquake can be accurately evaluated, so that a post-earthquake aqueduct structure processing scheme is quickly proposed, and a reference basis is provided for earthquake relief decision making.

The invention provides a large aqueduct intelligent temperature control system and method based on a digital twinning technology, and relates to the technical field of aqueduct temperature monitoring. A three-dimensional digital model of an aqueduct is constructed, and geometric parameters of the three-dimensional digital model are corrected through three-dimensional point cloud data of the aqueduct, so that the temperature of the aqueduct can be accurately controlled. Thermodynamic simulation calculation is carried out based on the three-dimensional digital model to obtain a simulation result, the aqueduct concrete temperature field simulation result is compared with the collected aqueduct temperature to obtain temperature deviation, parameters of thermodynamic simulation calculation are corrected according to the temperature deviation, and therefore the simulation result is updated, and the accuracy of the simulation result is improved. According to simulation results obtained after geometric parameters of the three-dimensional digital model and parameters obtained after thermodynamic simulation calculation are corrected, the water flow of the corresponding water pipe is controlled for cooling, local targeted cooling is achieved, and the problem that targeted cooling cannot be achieved for too high local hydration heat in the prior art is solved; the method is suitable for intelligent temperature control in the hydration heat process of the large aqueduct.

This invention relates to the field of hydraulic engineering, and more particularly to a method for safety assessment and optimization design of large-flow aqueduct structures. The method includes: collecting displacement, strain, and temperature monitoring sequences based on a triple probe, completing grouping, coordinate and time registration, and establishing a monitoring baseline; constructing a spatial model including support nonlinearity and fluid-structure boundary conditions, applying loading conditions, and obtaining response predictions; aligning monitoring and prediction in time and location, performing hierarchical Bayesian filtering inversion, and obtaining parameter posteriors and structural health; under the integration of in-service monitoring and accelerated degradation characteristics, using multi-task learning to generate material evolution and lifespan intervals, and automatically generating and simulating optimization schemes under reliability and maintainability constraints. This application forms a closed loop from assessment to design, effectively enhancing data comparability, traceability of uncertain information, and adaptability of the scheme to engineering projects.

The invention belongs to the technical field of aqueduct maintenance, and particularly discloses a high and large aqueduct body concrete spraying and maintaining device which comprises two main beams, a plurality of main beams and a plurality of auxiliary beams. The number of the straining beams is multiple, the multiple straining beams are sequentially distributed in the length direction of the two main beams, and the two ends of each straining beam are fixedly connected with the two main beams correspondingly; the rails are arranged in two rows, the two rows of rails are arranged on the two sides of the top end of the aqueduct body respectively, and the two main beams are perpendicular to the rails and are in sliding fit with the two rows of rails; the water tank is mounted at the top ends of the two main beams; the number of the spraying pipes is two, the two spraying pipes are located on the two sides of the aqueduct body respectively, and gaps are formed between the spraying pipes and the aqueduct body; the upper part of the spraying pipe is connected with the main beam; the water tank is communicated with the spraying pipe through a pipeline, and the pipeline is connected with a booster pump; and a plurality of spray heads are mounted on the spray pipe. Spraying maintenance can be conducted on the aqueduct body on the outer side of the aqueduct body, and the maintenance quality is improved.

The device comprises a cross beam horizontally and fixedly arranged above a rectangular channel section of an aqueduct in the left-right direction, and the portions, on the left side and the right side of a flow guide pier, below the cross beam are each provided with a grating type eddy current damping wave absorbing assembly. A water surface fluctuation monitoring sensor is arranged in front of the cross beam in the aqueduct, a fluctuation signal processor and a PLC are arranged on the cross beam, and the signal output end of the water surface fluctuation monitoring sensor is connected with the signal input end of the PLC through the fluctuation signal processor. The signal output end of the PLC is connected with the signal input end of the grating type eddy current damping wave absorbing assembly. The aqueduct has the following advantages that vertical oscillation of water in the aqueduct is effectively restrained, the vertical amplitude of water surface waves is reduced, and oscillation waves are prevented from splashing out of the aqueduct, so that the effective water cross section of the aqueduct is increased, the flow capacity of the aqueduct is improved, and the aqueduct is safe, low in energy consumption, low in cost and easy to implement.

The invention discloses a U-shaped aqueduct prestress multi-beam cooperative tensioning control method and system. The method comprises the steps that S1, a quantitative derivation model is constructed, based on an aqueduct structural mechanical equilibrium equation, a prestress coupling effect item is introduced for calculation, a prestress coupling matrix is output, and an initial tensioning sequence is derived; the device is simple in structure, and an initial tensioning sequence is deduced by establishing a mechanical equilibrium equation and introducing a coupling effect item; meanwhile, stress / displacement deviation data collected by a monitoring system in real time are fed back to an edge calculation terminal to calculate a control strategy in real time, adjustment is executed by a tensioning device, and therefore a field data closed-loop optimization mechanism is constructed, the tensioning force and sequence can be dynamically corrected, the limitation of a static model is broken through, and the construction efficiency is improved. And a displacement constraint term is introduced as a punishment or control condition in the optimization process, so that deformation overrun of key parts of the structure is effectively prevented, and the precision, safety and intelligent level of prestress construction are remarkably improved.

The invention discloses a supporting structure of a V-shaped supporting aqueduct and a design method, and relates to the technical field of water conservancy projects. The V-shaped support structure is arranged between the bottom of the upper water conveying structure and the top of the pier column; the V-shaped support structure comprises two bifurcated sections at the top, and the tops of the bifurcated sections are rigidly connected with the upper water conveying structure; in the direction from the lower end to the upper end of each bifurcated section, the two bifurcated sections are gradually and oppositely away from each other; the two branch sections are symmetrically arranged along the cross section of the upper water conveying structure. A plurality of pier columns are sequentially arranged in the length direction of the upper water conveying structure. Every two adjacent V-shaped supporting structures are arranged in a spaced mode. And the bending curvature of the forked section is gradually reduced from the lower end to the upper end of the forked section. By the adoption of the scheme, the numerical value and range of hogging moment at the fulcrum can be greatly reduced through the V-shaped support structure, the midspan deflection is reduced, and the whole aqueduct structure is safer and more durable while the spanning capacity is reserved.

The invention relates to the technical field of U-shaped aqueduct prefabricating construction, in particular to an adjustable non-opposite-pulling type U-shaped aqueduct body prefabricating construction formwork and method, which comprises an outer side formwork arranged on the outer side of an aqueduct body, an inner side formwork arranged on the inner side of the aqueduct body, a bottom formwork arranged at the bottom of the aqueduct body and an aqueduct top combined pull rod formwork arranged at the top of the aqueduct body, the combined trusses are arranged on the two sides and the top; the outer side formworks are fixedly connected with the trusses, the tops of the trusses on the two sides are fixedly connected through truss combination connecting rods, and the bottoms of the trusses are oppositely pulled and fixedly connected through groove bottom pull rods. The inner side formwork is connected with the truss combination connecting rods through the adjustable supporting rods to be fixed; the adjustable device refers to a vertical insertion depth adjustable bell and spigot which is arranged on the truss; the splicing rib plates between the templates are fixedly connected through gong bolts; groove body concrete is integrally poured and constructed at a time, so that horizontal construction joints and split bolt holes for reinforcing inner and outer side molds are avoided; the insertion depth of the vertical adjustable bell and spigot can be adjusted, inner and outer formworks can be increased or decreased, the device is suitable for construction of aqueducts with the same semicircle inner diameter and different straight section heights, the formwork application range is widened, cost is saved, and the construction quality and working efficiency of the U-shaped aqueduct are improved.

The invention discloses aqueduct butt joint gap detection equipment for hydraulic engineering, and relates to the technical field of detection equipment. Comprising a mounting groove plate, two positioning shafts, a mounting plate and a telescopic scale measuring piece, and a shielding mechanism is arranged on one side of the top of the mounting groove plate; the shielding mechanism comprises a supporting block, an electric telescopic rod, a shielding plate and shielding sliding plates, vertical sliding grooves are formed in the sides, close to the positioning shaft, of the two shielding sliding plates correspondingly, and sliding columns in sliding fit with the vertical sliding grooves are arranged on the outer wall of the positioning shaft. The shielding plate is pushed by the electric telescopic rod to move downwards along the inner wall of the aqueduct, and the shielding plate moves to drive the shielding sliding plate to move downwards along the sliding column, so that the butt joint of the aqueduct is shielded, and the situation that the butt joint is gradually enlarged due to the pressure of water flow and the like when a maintainer reaches the aqueduct is avoided; and therefore, the conditions of water leakage, structural stability damage and the like are avoided.

The invention relates to the field of hydraulic structures, in particular to a three-dimensional damage rapid positioning method for a complex aqueduct structure. Acoustic emission or microseismic signals in the aqueduct structure are collected, and the first arrival time of the signals is picked up through an STA / LTA long and short time window energy ratio method; constructing a curved surface structure model composed of a groove surface and a side wall; parameterizing the cross section, and constructing a groove surface propagation path set according to the position relationship between the damage point and the sensor in a parameter space; for each pair of damage points and sensors, selecting a path with the minimum groove surface path length as a shortest propagation path, and calculating theoretical arrival time according to the shortest propagation path; establishing a residual function between the theoretical arrival time and the actually measured arrival time, and constructing a jacobian matrix of arrival time change; and solving the coordinates and occurrence time of the damage source. According to the method, the parameterized model of the aqueduct section is established, traditional ray tracing is replaced with the curved surface shortest path thought, and the numerical difference and rapid iteration methods are combined, so that efficient and robust damage source positioning is achieved.

The invention discloses an automatic monitoring method for a water delivery aqueduct expansion joint, an automatic monitoring device for the water delivery aqueduct expansion joint, automatic monitoring equipment and a computer readable storage medium. According to the method, continuous collection of expansion joint deformation is achieved through a distributed sensor, and interference caused by thermal expansion and cold contraction is eliminated in combination with a temperature compensation algorithm; and graded early warning is executed according to the deformation rate and the gap width deviation, so that the real-time performance and reliability of health monitoring of the aqueduct structure are effectively improved.

The utility model relates to the technical field of hydraulic engineering, in particular to an inter-aqueduct joint water stop device which comprises aqueduct bodies, aqueduct piers and waterproof assemblies, a plurality of aqueduct bodies are arranged in parallel, the adjacent aqueduct bodies are bonded through adhesives, the upper end faces of the aqueduct piers are connected with the aqueduct bodies, and the waterproof assemblies are connected to the upper end faces of the adjacent aqueduct bodies. According to the utility model, the telescopic component adjusts the width of the connecting plate to fit the joint between the connecting plate and the aqueduct, so that the deformation and damage of the connecting plate caused by thermal expansion and cold contraction of the aqueduct main body are avoided, and the adjusting component moves and drives the waterproof strip to move vertically, so that the waterproof strip clings to the inner wall of the aqueduct main body; water leakage caused by inclined displacement of the waterproof baffles due to abrasion of the waterproof strips or displacement and height difference of the aqueduct bodies is prevented, the positioning assemblies limit movement of the connecting plates in the vertical direction, and meanwhile the positioning assemblies limit movement of the aqueduct bodies on the two sides.

The invention relates to the technical field of water conservancy projects, in particular to a design method of a continuous rigid frame aqueduct. Comprising the following steps that the building position of the continuous rigid frame aqueduct is determined, and the aqueduct span arrangement of the continuous rigid frame aqueduct is drawn up according to the building position; hole span arrangement, side span and main span are determined according to a preset side-mid span ratio range of the continuous rigid frame aqueduct; the root beam height and the closure section beam height are determined according to the main span and the preset height-span ratio range of the continuous rigid frame aqueduct; the thickness range of a plate, the length of a pier top cast-in-place section, the length of a closure section and a groove body bottom curvilinear equation are determined, and a suspended casting section is segmented; the center distance of the double-limb thin-wall pier and the center distance of double limbs are determined; arranging prestressed steel beams for the continuous rigid frame aqueduct in the longitudinal direction and the transverse direction respectively; and constructing a finite element model and carrying out finite element analysis. According to the design theory and method of the continuous rigid frame aqueduct, rapid design of the continuous rigid frame aqueduct can be achieved, and a basis can be provided for standard compilation.

The utility model relates to an integral rapidly-assembled aqueduct bent frame column construction operation platform which comprises a vertical rod support. Three layers of operation bedplates are arranged in the height direction of the vertical rod bracket at equal intervals; the guardrails are installed on the periphery of the vertical rod support and located between the adjacent working platens. The one-truss operation module is composed of the vertical rod support, the three layers of operation platens and the guardrails, the adjacent operation modules are connected through the hook-shaped plug pins, the operation modules can be modularly produced in batches, and when the operation modules are used, only the corresponding number of operation modules need to be selected according to the heights of the framed bent columns, and the operation modules can be conveniently assembled. The aqueduct bent frame column construction operation platform can be assembled by vertically stacking the multiple truss operation modules and inserting the hook-shaped plug pins, during disassembly, only the hook-shaped plug pins need to be pulled out and the operation modules need to be disassembled, compared with a traditional on-site building and scaffold disassembly mode, the operation modules of the construction operation platform can be repeatedly used, and the construction efficiency is improved. Assembly and disassembly are easy and fast, time and labor are saved, and the construction progress is effectively accelerated.

To provide a water leakage prevention structure and a water leakage prevention method of a water pipe bridge capable of suppressing malfunction due to breakage of an expansion cover.SOLUTION: In a water leakage prevention structure of a Suikan-kyo Bridge in which a water leakage prevention device 10 for preventing water leakage due to detachment of a pipe body 1 is attached to a pipe joint JT in which end portions of the pipe body 1 forming a pipeline of a bathroom 90 are connected to each other, the water leakage prevention device 10 includes a flexible pipe 14 as a metal expansion cover surrounding the pipe joint JT, and an external fitting member 11,12 joined to both end portions of the flexible pipe 14 in a pipe axis direction and externally fitted to the pipe body 1 in a watertight manner. water pipe bridge, the water leakage preventing device 10 is arranged in an area X sandwiched by a pair of supports 70 in the same abutment 91.SELECTED DRAWING: Figure 2

The utility model belongs to the field of hydraulic engineering facilities, and provides an assembly type glass fiber reinforced plastic mortar pipe aqueduct which comprises an aqueduct body, a truss type aqueduct supporting column and a supporting protection assembly, the truss type aqueduct supporting column comprises a truss steel stand column and a truss structure, and the truss steel stand column comprises a concrete bearing platform, a steel stand column and a truss base; the aqueduct body is fixed to the truss type aqueduct supporting columns through a plurality of supporting structures. The supporting protection assembly and the truss type aqueduct supporting column are welded together. The truss structure comprises a plurality of triangular frame units, and each triangular frame unit is composed of an upper chord member, a lower chord member, a vertical rod and a web member. The device has the advantages of being high in construction speed, high in intelligent building degree, free of maintenance in the life cycle and excellent in durability.

The utility model provides an aqueduct body expansion joint water stop device which comprises aqueduct bodies, and an expansion joint is formed between every two adjacent aqueduct bodies. The U-shaped water stop belts are connected with the two adjacent groove bodies respectively, and U-shaped grooves of the U-shaped water stop belts are plugged at the expansion joints; and the stainless steel pressing plate is located between the U-shaped water stop belt and the groove body, a closed cavity is formed between the stainless steel pressing plate and the U-shaped water stop belt, and the closed cavity is filled with caulking materials to form a caulking material glue layer. According to the utility model, a caulking type water stop mode and a pressing plate type water stop mode are combined, and the U-shaped water stop belt, the stainless steel pressing plate and the caulking material are adopted, so that the total cross-section water stop function of the water stop rubber belt is realized, water permeation is effectively prevented, and the sealing performance of the aqueduct is enhanced.

The present invention discloses an aqueduct structure and a waterstop maintenance construction device, and relates to the technical field of aqueduct maintenance. It includes an enclosure assembly and a support frame; there are walkway plates on both sides of the top of the U-shaped aqueduct, and there are crossbeams between the walkway plates; the enclosure assembly includes a first enclosure plate, a second enclosure plate, a gate, and a sealing device; the gate can rotate vertically around the first enclosure plate and the second enclosure plate; the sealing device is located at the bottom of the first enclosure plate and the second enclosure plate, and at the contact point between the gate and the U-shaped aqueduct; each layer of the support frame includes a first support rod and a second support rod. The construction personnel of the present invention can descend into the aqueduct to inspect or repair the side wall of the aqueduct, which is convenient and applicable. The present invention also discloses a method for using the aqueduct structure and the waterstop maintenance construction device.

The utility model provides a kind of aqueduct hoisting structure, belong to aqueduct technical field, it solves the technology problem that the direct connection of aqueduct is carried out by sling, to cause the strength of sling to be reduced possibly due to friction, abrasion in use process, increase the risk of fracture.A kind of aqueduct hoisting structure, including base, two first sliding grooves are set in base top, two support rods are fixedly connected with symmetry in first sliding groove interior, two first clamping plates are symmetrically slidably covered on the surface of two support rods, the moving mechanism for moving first clamping plate is equipped on the surface of two first clamping plates away from support rod side, two first storage grooves are set in the surface of first sliding groove close to two first clamping plates side, two first tension springs one end are fixedly connected in first clamping plate side, two first tension springs other end are fixedly connected in first storage groove interior side.In the utility model, through the setting of base and clamping plate, the phenomenon that sling appears fracture can be reduced.

The utility model provides an anti-leakage aqueduct structure, and relates to the technical field of aqueduct structures. A protective cover is fixedly mounted at the upper end of an inner cavity of the fixed aqueduct; and symmetrical side edge plates are fixedly mounted at the upper end of the side wall of the outer end of the fixed aqueduct. Water flow flows to the butt joint position in the aqueduct and is blocked and sealed by the connecting sealing plate, the water flow cannot leak from the butt joint position, so that the aqueduct can be normally used, the aqueduct structure adopts special anti-leakage materials and design, the sealing performance of the aqueduct can be effectively improved, the problems of water leakage and leakage are solved, and due to the existence of the connecting sealing plate, the sealing performance of the aqueduct is improved. Corrosion and damage caused by water leakage in the aqueduct structure are avoided, so that the service life of the aqueduct is prolonged, and the problems that the aqueduct structure needs to be installed and used in a butt joint mode due to the fact that the aqueduct structure is long, and normal use of the aqueduct is affected due to the leakage problem possibly caused by the fact that water flows to the butt joint position if the butt joint position cannot be sealed and blocked are solved.

The utility model belongs to underground pipeline technical field, concretely relates to a shallow burying underpass pipeline trenchless structure. Including pipe shed, pipe shed support and support base, pipe shed is constituted by steel flower pipe, is arranged in rectangular section, steel flower pipe distributes in the top and both sides of rectangular section, pipe shed support adopts I -beam, is arranged on support base, and constitutes the support system with pipe shed together, underpass pipeline is located in the inside of pipe shed, and after construction is completed, passes through the bottom of the structure that is worn, and the clearance between pipe shed and underpass pipeline is filled with medium coarse sand. The steel flower pipe of pipe shed is consolidated with surrounding soil through cement slurry or double slurry grouting, and forms the reinforcement area. The support base is arranged at the bottom of the underground excavation construction area, and the foundation reinforcement treatment is carried out when encountering poor foundation. The structure does not affect the normal operation of the crossed structure during construction, and has little influence on the above structures such as the crossed existing pipeline, aqueduct and irrigation canal.

The utility model provides an aqueduct hoisting structure which is used for being matched with a truck crane to complete hoisting of an aqueduct, a pair of aqueduct hoisting structures is arranged, the aqueduct hoisting structures are symmetrically arranged on the two sides of the upper portion of the aqueduct in the length direction of the aqueduct, and each aqueduct hoisting structure on the side comprises a hoisting rod with hoisting lugs at the two ends, an upper steel wire rope and a lower steel wire rope. The two rod ends exceed the wide edge of the aqueduct notch and are provided with lifting lugs, the two rope ends of the upper steel wire rope are detachably hung between upper lug holes of the pair of lifting lugs through shackles respectively, the center of a rope body is hung through a truck crane, and the two rope ends of the lower steel wire rope are detachably hung between lower lug holes of the pair of lifting lugs respectively through shackles. And the whole aqueduct is hung by the lower steel wire rope. According to the utility model, the integrity of the aqueduct body can be ensured, the aqueduct is stably hoisted, the aqueduct is not damaged, and economic loss caused by hoisting operation is avoided.

The application discloses a novel water conservancy aqueduct slot forming machine with large span and large tonnage, which comprises two-span half-length main frames, the main frame comprises a bearing main beam located in the middle part, and front guide beams and rear guide beams are arranged at the two ends of the bearing main beam respectively; supporting legs for supporting the main frame on piers; a hoisting device capable of reciprocating along the main frame; a hanging outer rib system arranged on the bearing main beam, which is connected with an outer mold system; an inner mold system capable of entering and exiting the outer mold system; and a conveying vehicle capable of moving on the top surface of a pouring groove body; the application has the beneficial effects that: the main frame beam adopts a single main beam form, which greatly reduces a series of costs such as manufacturing, transportation, installation and disassembly, and the rotation function of the front auxiliary supporting leg and the transverse movement function of the main supporting leg and the rear auxiliary supporting leg are more conducive to adapting to curve construction.

The present application relates to the technical field of hydraulic engineering, in particular to a method for controlling displacement of a double-curvature large-span historical relic aqueduct arch ring with reconstructed middle pier and reinforced, comprising a main arch ring: a side wall of the main arch ring is fixed with reinforcing steel bars by bolts, and the reinforcing steel bars are fixed with stainless steel plates at the bottom, and the stainless steel plates are arranged on the top of the fixed elevation position; the stainless steel plates are fixed to the side wall of the main arch ring by the reinforcing steel bars, and the distance between the stainless steel plates and the fixed elevation position is less than 10 cm; the reinforcing steel bars are fixed with thermometers on the side wall. In the process of local reconstruction and reinforcement construction, the displacement of the arch ring can be detected multiple times to realize real-time displacement monitoring, which is convenient for precise control of the displacement distance, avoids detection errors during the process of only removing and reconstructing the middle pier, and causes the arch ring to settle and displace, thereby causing the reinforcement to fail, and the process of reinforcing the arch ring is finely detected to control the displacement, which is convenient for controlling the displacement safety of the arch ring. The present application improves the construction efficiency and controls the displacement accurately.

The utility model provides an assembly type arch aqueduct supporting frame which comprises an arch rib, buttresses are installed at the bottom of the arch rib, a plurality of framed bent columns are arranged at the top of the arch rib, the tops of the framed bent columns are connected with an aqueduct body through an installation mechanism, and the installation mechanism comprises a connecting base and a slope installation column. A limiting groove is formed in the side edge of the inclined surface mounting column, the connecting seat is mounted at the top of the framed bent column, a mounting seat is mounted at the top of the connecting seat, a clamping assembly matched with the limiting groove is arranged in the mounting seat, and a pedal assembly matched with the clamping assembly is arranged on the outer surface of the mounting seat. Compared with the prior art, the aqueduct has the advantages that the aqueduct structure is formed by splicing the plurality of aqueduct bodies in a modularized mode, so that when a certain section of aqueduct body of the aqueduct is damaged, the aqueduct body at the damaged position can be replaced, and the maintenance cost of the aqueduct body is reduced.

The utility model discloses a beam type U-shaped aqueduct body post-cast strip construction separation type internal mold rack, which relates to the field of water conservancy construction, and comprises a walking rack body, a template support system and a U-shaped aqueduct body post-cast strip internal mold manufactured according to the width and the structural characteristics of a post-cast strip between two adjacent constructed U-shaped aqueduct bodies, the walking frame body comprises two layers of construction platforms which are arranged in parallel up and down, and a plurality of supporting rods are installed between the two layers of construction platforms. The U-shaped aqueduct body post-cast strip inner mold is accurately installed and fixed at the post-cast strip position between the two adjacent U-shaped aqueduct bodies, the problem that through holes exist in the post-cast strip positions of the U-shaped aqueduct bodies due to the construction method that the opposite-pull screws are arranged to fix the inner mold is solved, and the overall consistent performance and the overall strength of a construction body of a U-shaped aqueduct are improved.

The invention belongs to the field of anti-explosion safety of hydraulic structures, and provides a method for evaluating the overall stability of an aqueduct structure under the action of an internal underwater contact explosion load, and the method comprises the steps: building a fine full-coupling analysis model of a large aqueduct under the internal underwater contact explosion; an initial load is applied, the aqueduct structure generates an initial response, and after the structural response is stable, the explosive is ignited; initial damage of the aqueduct structure under the action of the explosive shock waves is calculated, and a failure unit is deleted through a failure unit erosion technology; reconstructing a post-explosion residual structure model of the aqueduct; carrying out nonlinear static analysis on the overall stability of the aqueduct after internal contact explosion; comparing and verifying the structure response result with the simulation result of the existing analysis method; evaluating the damage grade and the overall stability of the aqueduct structure under the action of the blast load by taking the residual bearing capacity of the structure as a judgment basis; and according to a damage grade judgment result, carrying out safety assessment on the overall stability of the aqueduct after explosion. According to the invention, rapid assessment of the damage degree of the aqueduct structure under different internal contact explosion conditions is realized.

This invention relates to the field of aqueduct construction technology, and discloses a method for on-site construction of a U-shaped aqueduct body based on a self-propelled trenching machine, as well as the self-propelled trenching machine itself. It aims to solve the technical problems of poor structural adaptability, insufficient construction stability, difficulty in precision control under complex working conditions, and inefficient construction organization when using conventional bridge mobile formwork for the construction of large-span U-shaped thin-shell aqueducts in the prior art. The invention includes the following steps: S1. Equipment assembly and anti-overturning reinforcement; S2. Pre-stressing and positioning of the formwork structure; S3. Installation of reinforcing steel and prestressed structure; S4. Positioning of the inner formwork anti-buoyancy structure; S5. Concrete pouring and curing; S6. Prestressing tensioning and grouting; S7. Equipment demolding and longitudinal movement through holes; S8. Formwork closing and cyclic construction. The self-propelled trenching machine of this invention, by setting a horizontally opening and closing lower hanging beam and a foldable hydraulic inner formwork structure, enables the formwork to accurately adapt to the complex hyperboloid contour and ultra-large width of the U-shaped aqueduct, solving the structural adaptability problem of conventional formwork.

The utility model discloses an aqueduct for hydraulic engineering in the technical field of hydraulic engineering, which comprises an aqueduct body and a filter screen, the filter screen is arranged in the aqueduct body, a mounting plate is arranged on the inner side of the aqueduct body, the mounting plate is fixedly connected with the aqueduct body, a first motor is arranged at the top of the mounting plate, and the first motor and the mounting plate are fixed through screws. A first belt wheel is arranged at the output end of the first motor, a belt is arranged on the inner side of the first belt wheel and rotationally connected with the first belt wheel, a fixing shaft is arranged in the middle of the filter screen and rotationally connected with the filter screen, and a smashing cutter is arranged on one side of the filter screen. According to the device, the filter screen, the mounting plate, the first motor, the first belt pulley, the belt, the fixed shaft, the crushing cutter and the second belt pulley are arranged, so that weeds are crushed, the dredging effect is achieved, and the weeds can be crushed only by starting the first motor to drive the two belt pulleys and the belt to rotate and further drive the crushing cutter to rotate.

The invention provides a water diversion aqueduct and slag retaining wall combined arrangement structure and a construction method, a water diversion canal system is arranged under the topographic conditions of a high steep slope and a developed deep trench in a high seismic intensity area, an aqueduct is arranged in a building of the water diversion canal system to cross the deep trench, and a concrete slag retaining wall is arranged in the deep trench in combination with the aqueduct to reduce the height of the aqueduct. Pier columns of the aqueduct take slag blocking walls as foundations, the bottoms of the pier columns adopt an expanded section form, and vertical steel bars are arranged to penetrate into the concrete slag blocking walls. The inner side of the slag blocking wall is filled with waste slag of channel system construction, and a water intercepting and draining ditch is arranged around a slag stacking body and penetrates through the aqueduct. According to the aqueduct structure, the anti-seismic safety degree of the aqueduct structure can be improved, the engineering investment of the aqueduct is saved, the slag field can be arranged on the inner side of the slag stopping wall, and nearby slag discarding of canal system engineering is facilitated so that the transportation cost can be saved.