142results about How to "Small structural deformation" patented technology

The invention discloses a hybrid welding method and hybrid welding equipment for laser electromagnetic pulse. The method can be used for laser seam welding and laser spot welding technology, a pulsed high magnetic field is applied to a welding region during the process of laser welding on a workpiece with the effect of laser beams so as to mutually react with an induced plasma, a welding pool and a stress strain field through welding and complete welding task. The equipment comprises a laser device, an electromagnetic pulse generator, a numerical control system, an optical transmission system and a laser electromagnetic pulse combined machining head. The combined machining head is used for integrating the laser beams with the pulsed high magnetic field and adjusting the distance between an electromagnetic conversion device and the workpiece; the combined machining head is arranged on a machine tool. The structural deformation can be reduced, the welding quality and machining efficiency are improved, and insurmountable technical problems when a metallic material structure is manufactured through existing single welding technology are solved.

The invention discloses a method for molding a phenolic panel honeycomb sandwich structural member and belongs to the technical field of composite material molding. The phenolic panel honeycomb sandwich structural member comprises inner covering skin, outer covering skin, a frame, a honeycomb, a reinforcing fiber prepreg tape reinforcing layer, an inner glue film layer and an outer glue film layer. The method comprises preparing a phenolic resin prepreg cloth, preparing a mold having the honeycomb sandwich structure shape, pre-curing the inner covering skin and the frame, paving a reinforcing fiber prepreg tape through bonding the reinforcing fiber prepreg tape to the surface of the pre-molded inner covering skin to obtain the reinforcing fiber prepreg tape reinforcing layer, carrying out honeycomb installation and pre-curing, pre-curing the outer covering skin, assembling a product through paving the outer covering skin layer, integrally curing the assembled product and carrying out demolding. The method can mold a large-size honeycomb sandwich structure. The molded honeycomb sandwich structure does not deform, lose viscidity and produce bulge, has the size, weight and shape satisfying design requirements and has good ablation resistance.

The invention discloses a pulsed high magnetic field auxiliary laser welding method and device. The method and device can be applied to laser spot welding and seam welding. According to the method, in the overall welding process, laser beams are emitted to a workpiece to form a welding connector, a high pulsed magnetic field is exerted to the welding connector which is just solidified and the surrounding area, the pulsed magnetic field generates pressure stress on the surface of the workpiece to enable the connector area to have plastic deformation, residual stress is released to lower the degree of stress concentration and the degree of structural deformation of the welding connector, and the fatigue strength of the welding connector is improved. The device comprises a laser, a pulsed magnetic field generator, a numerical control system, an optical transmission system and a laser pulsed magnetic field composite processing head. The processing head is used for integrating the laser beams and the high pulsed magnetic field, and regulating the perpendicular distance between an electromagnetic conversion device and the surface of the workpiece and the horizontal distance between the electromagnetic conversion device and the laser beams. By means of the pulsed high magnetic field auxiliary laser welding method and device, structural deformation can be lowered, welding quality and processing efficiency are improved, and the processing effect which is superior to that of an existing laser welding process is achieved.

The invention provides a capacitance micro-machining ultrasonic sensor for measuring density and a production method thereof. The capacitance micro-machining ultrasonic sensor comprises a monocrystalline silicon substrate, a cavity formed by corrosion arranged on the monocrystalline silicon substrate, a first silica thin layer arranged on the upper end surface of the monocrystalline silicon substrate and sealing the cavity, a metal electrode layer formed by sputtering on the silica thin layer, and a silicon nitride thin layer and a second silica thin layer formed by successively etching on the metal electrode layer. The sensor disclosed herein has the characteristics of insulation, corrosion resistance and high temperature resistance, and can guarantee the reliability of CMUT in different measurement environments and the measurement precision.

The invention discloses a manufacture method of a Z-shaped steel sheet pile through continuous cold roll forming by continuously rolling and forming with a cold bending unit and distributing preliminary shafts at both sides of a central shaft. Web plates are continuous so as to greatly improve the modulus and the flexible rigidity of a cross section and fully exert the mechanical characteristic of the cross section. The manufacture process takes great effects in aspects, such as controlling the quality of the cold-bent Z-shaped steel sheet pile, improving the matched accuracy and the connection strength of the preliminary shafts of the steel sheet pile, and the like. The invention controls the product size and overcomes the defects generated in the processing process by performing the preliminary shafts of the cold-bent Z-shaped steel sheet pile and wholly forming the Z-shaped steel sheet pile.

The invention discloses a variable groove width skeleton tool and a method for forming fiber rings by utilizing the tool. The method comprises the following steps of designing a groove-width-adjustable dismountable winding skeleton tool, wherein the groove width can be adjusted to meet the requirements of winding in any integral number of turns according to different diameters of fibers; winding photonic crystal fibers on the dismountable skeleton by using a special winding technology and a low-tension winding technology; curing the photonic crystal fibers to improve the performance level of photonic crystal fiber rings by using a novel gluing curing technology; dismounting the dismountable skeleton tool to obtain formed photonic crystal fiber rings. According to the skeleton tool and the method, a gluing curing process is a glue impregnation curing process, and new adhesive curing conditions, a novel curing adhesive, a novel gluing curing process and stress releasing measures are designed, so that the residual curing stress of the photonic crystal fiber rings and changes in the inner void structure of the photonic crystal fibers are reduced, and the environmental characteristics of the photonic crystal fiber rings are improved.

The present invention relates to method of reinforcing concrete structure with top pushed pre-stressed carbon fiber cloth and its application. The method includes the following steps: fixing one end of the carbon fiber cloth to the concrete structure and adhering the other end to anchor plate and fixing to the pushing board to form the stretching end; brushing special glue to the surface of concrete structure, controlling the interval between the stretching end and the concrete structure with the limiting board, and pushing the stretching end forward with the pushing device the stretch the carbon fiber cloth; reaching the stress and regulating the limiting board to make the stretching end adhering the surface of the concrete structure; and disassembling the pushing device, the limiting board and the pushing board after curing. The present invention can reach excellent reinforcing effect.

The invention discloses a method for testing braking force of a muzzle brake. The method is characterized in that four measuring points on the outer surface of a barrel close to the muzzle brake are symmetrically selected, a unidirectional strain gauge is adhered on each measuring point, and directions of sensitive grids are coincided with the axial direction of the barrel; the strain gauges of the measuring points on upper and lower surfaces of the barrel form a bridge system, the strain gauges of the measuring points on left and right surfaces of the barrel form another bridge system, and an average value is solved via strain on the two bridge systems; a gun shoots, the muzzle brake is impacted by a gas flow of the gun in an aftereffect period, tensile force is applied to the barrel by the muzzle brake, and accordingly the barrel stretches and deforms; and the strain gauges sense that the barrel stretches and deforms, electric signals are generated and are transmitted to a data acquisition unit by a dynamic strain indicator, the axial strain of the barrel caused by the muzzle brake is acquired via data processing, and the braking force is acquired by the aid of the Hooke's law. The method has an epoch-making significance in studying a law of recoil resistance of guns, reducing shooting exciting force and vibration of muzzles and improving shooting dispersion of the guns.

The invention provides railway structure concrete protecting coating and a preparation method and a using method thereof. The protecting coating comprises a sealing primer layer, a polyurethane middlepaint layer and a fluorocarbon finish paint layer. The protecting coating has excellent adhesion; when the protecting coating is used for protecting a railway concrete bridge, the protecting coatingcan avoid occurrence of a situation that the railway concrete bridge cracks first and then is repaired in a special environmental region, significantly improves the durability of the railway concretebridge, prolongs the service life the railway concrete bridge, can achieve an excellent concrete protecting effect in the case of relatively thin concrete bridge coating thickness, and is convenient and fast to use; the protecting coating can also be used for protecting the surface of a ballastless track structure, and when the protecting coating is applied to the surface of a concrete track plateunder a steel rail or the surface of a ballast bed plate, the temperature difference between day and night due to sunlight irradiation can be reduced, the warpage amount of the track plate can be reduced, the open joints of plate corners or upwarp of the ballast bed plate or other damages can be reduced or even eliminated, and the effect of improving the durability of a ballastless track high-speed railway with a strict requirement on the smoothness is relatively good.

The invention discloses a ship double bottom block assembly welding technology. The ship double bottom block assembly welding technology comprises the following steps of: presetting corresponding tire holders of the double bottom, marking a seam line mark on each tire holder, and starting to assemble external plates corresponding to the seam line marks on the tire holders, and welding the external plates; marking vertical and horizontal framework mounting lines on the external plates, and mounting a middle bottom girder; assembling vertical and horizontal frameworks at corresponding positions of the vertical and horizontal framework mounting lines, welding a front pressurizing row, welding the seam between the frameworks and the seam between the frameworks and the external plates, then, detaching the pressurizing row, correcting deformation, and fitting out block by block; hoisting inner bottom plates on the vertical and horizontal frameworks, marking block assembly locating lines on the inner bottom plates, and welding flying rings block by block; hoisting and turning over the blocks, placing the blocks on a platform, and welding the seams between the vertical and horizontal frameworks and the inner base plates, and the sealing run of the external bottom plates. With the adoption of the technology provided by the invention, the ship double bottom assembly efficiency is high, and the welding quality is good.

The invention provides a pipeline corridor construction structure crossing a track shield interval. The pipeline corridor construction structure crossing the track shield interval enables structural deformation of the track interval to be small, meets the requirement on track traffic normal operation, and enables the corridor structure to be easy in operation management and maintenance. The pipeline corridor construction structure crossing the track shield interval comprises construction wells, and a pipeline corridor between each two construction wells. The construction wells concretely comprise an original well and a plurality of receiving wells; the original well is used for initially positioning a position of the pipeline corridor; the receiving wells are used for gradually positioning during a pipeline corridor excavating process; a pit of the original well is reinforced; a back rest foundation of the original well is reinforced; an outlet foundation of the original well is reinforced; a first drilling pile enclosure is arranged at a side wall of the original well; a first triaxial mixing pile water-stop curtain is arranged at the outer side of the first drilling pile enclosure; a pit of each receiving well is reinforced; a second drilling pile enclosure is arranged at a side wall of each receiving well; and a second triaxial mixing pile water-stop curtain is arranged at the outer side of each second drilling pile enclosure.

The invention discloses a gravity balance device and a method of a flexible coordinate measuring machine based on magnetic rheologic fluid. An outer case of a magnetic rheologic fluid variable damping clutch mechanism is connected with an outer case installing shaft of the magnetic rheologic fluid variable damping clutch mechanism, an inner case is fixedly connected with the end surface of a lower shaft sleeve, a permanent magnet and a damping disc are arranged in the inner case, the outer cylindrical surface of the permanent magnet is provided with an electromagnet, the output current of an electromagnetic coil is calculated and changed according to the pose dynamic state of the measuring machine for changing the size of an output electromagnetic filed, the iron and the permanent magnet are in combined use, the damping moment is dynamically changed, and the self-adapting dynamic regulation of the balance moment of the operation pose can be realized, so the mechanism has the advantages of reliable work and energy source saving. Through the tooth-shaped design on the friction surface of the damping disc in the magnetic rheologic fluid variable damping clutch mechanism, the invention improves the friction force between the magnetic rheologic fluid and the damping disc, and effectively prevents the slippage. The mechanism reduces the structural deformation caused by self gravity of the measuring machine, reduces the measuring intensity of measurers, and has the advantages of convenient loading and unloading, simple structure and beautiful appearance.

The invention provides a viscoelastic friction type energy dissipation self-resetting buckling-restrained brace. The viscoelastic friction type energy dissipation self-resetting buckling-restrained brace comprises an upper fixing cylinder, a lower fixing cylinder, fixing guide plates, a piston rod, a fixing end plate, springs, a first viscoelastic energy dissipation assembly, a second viscoelasticenergy dissipation assembly, first friction structures and second friction structures. Both ends of the fixing guide plates are separately inserted and fixed into the upper fixing cylinder and the lower fixing cylinder. The piston rod is arranged between the interior of the upper fixing cylinder and the interior of the lower fixing cylinder. The first viscoelastic energy dissipation assembly andthe second viscoelastic energy dissipation assembly separately sleeve both ends of the piston rod. The springs are arranged between the first viscoelastic energy dissipation assembly and the second viscoelastic energy dissipation assembly. The first end of the piston rod limits the first viscoelastic energy dissipation assembly, and the fixing end plate limits the second viscoelastic energy dissipation assembly. The viscoelastic friction type energy dissipation self-resetting buckling-restrained brace has self-resetting capability, can be automatically adjusted according to the brace force deformation characteristics to prevent damage to the internal components of the brace, and has stable and efficient energy dissipation capability.

The invention discloses a transformer substation structural rigidity strengthening device. The transformer substation structural rigidity strengthening device is mainly composed of a vertical energy consumption supporting system and a floorslab supporting system. The vertical energy consumption supporting system is mainly composed of buckling-restrained braces, partial buckling-restrained braces and a metal rubber damping device. The floorslab supporting system is mainly composed of welded I-steel. According to the strengthened supporting system, the overall rigidity of the structure is enhanced through different braces, and the structure is less damaged or broken under the earthquake action, the lateral force resisting rigidity of all layers of structure bodies can be improved through the vertical energy consumption supporting system, the plane rigidity of the structure is enhanced through the floorslab supporting system, and the structure bodies are connected into a whole to bear force together. The supporting scheme is an effective solution for planar and vertical irregular structures, and has the characteristics that the using function influence is small, construction is convenient, and the ratio of loss to profit is small, and has wide application prospects for irregular transformer substation structures.

The invention relates to an insertion combination type recyclable expanding body anchor rod of a high-bearing inner cabin and a construction method and belongs to the technical field of civil engineering. An unbonded steel strand is rewound through a smooth arc-shaped top bearing anchor end to form a double number of steel strands, and after forming through a specially-made steel strand locking device, the steel strands, a locking body and a binding lacing strip are commonly locked to form an insertion locking assembly, and the assembly is connected with a cabin type assembly composed of a bottom fixed pedestal and the like and is fastened through a locking screw and a nut. After the insertion combination type recyclable expanding body anchor rod of the high-bearing inner cabin is sent into a stratum, the high-pressure grouting cabin is unfolded in an expanded mode, a large-diameter high-strength anchor body is formed, and after a supporting function with high anchoring safety is finished, the unbonded steel strand can be recycled efficiently and rapidly and is simple to construct and simple in structure.

The invention discloses a design and construction method for adjacent new construction or simultaneous construction of a bridge and a subway tunnel. When the clear distance between the line positionsof the left subway tunnel and the right subway tunnel is 8.6-13.5 m, a bidirectional framing type section bridge or a bidirectional whole-width type section bridge is adopted as the bridge. One one-way single-width bridge or the two-way whole-width section bridge in the two-way framing type section bridge spans one subway tunnel through a transverse single-span frame beam. The structural center line of the one-way single-width bridge or the two-way whole-width type section bridge is aligned with the structural center line of the crossed subway tunnel, the other subway tunnel crosses underground from the side of the bridge, and the minimum horizontal safe clear distance between the crossed subway tunnel and the adjacent bridge pile foundation is controlled to be 2-4 m. The bridge and the subway tunnel span each other (cross) in the space, it is guaranteed that the spatial distance between the bridge and the subway tunnel reaches the minimum when the bridge and the subway tunnel span each other or cross each other, and mutual safety of structural bodies of the bridge and the subway tunnel is guaranteed through various comprehensive measure methods.

The invention provides an eccentric annular large-cantilever prestressed steel structure system. The system comprises a roof structure layer, a floor structure layer, interlayer connecting supports, prestressed inhaul cables, concrete core cylinders, a conversion truss, large-cantilever reinforcing inclined struts, cable-steel connecting joints and floor supporting plates. The eccentric annular large-cantilever prestressed steel structure system is characterized in that the component arrangement of the roof structure layer and the component arrangement of the floor structure layer are consistent with the axes of the concrete core cylinders, and the roof structure layer and the floor structure layer are both arranged in an orthogonal mode; the lower concrete core cylinders are symmetrically arranged on the two sides of the structure, and the four main cantilever giant trusses are formed by connecting main cantilever components of the roof structure layer and the floor structure layer, the interlayer connecting supports between the prestressed steel inhaul cables and the main cantilever components, the conversion truss, the large-cantilever reinforcing inclined struts and the like at the axes of the concrete core cylinders and serve as main vertical force transmission structures; the roof structure layer and the floor structure layer are connected through the interlayer connecting supports, and the floor structure layer is connected with the concrete core cylinders through the conversion truss; and external prestressed steel cables at the cantilever ends are arranged on upper chords of the roof structure layer and anchored to upper chords of the floor structure layer in a space cable arrangement mode, and vertical and inclined components are not arranged between the roof structure layer and the floor structure layer except for inner rings, outer rings and the interlayer connecting supports at the concrete core cylinders.

The invention relates to a climbing frame adopting a rotary wheel centrifugal triggering type falling protector. The climbing frame adopting the rotary wheel centrifugal triggering type falling protector comprises scaffold floors, a connection plate, an overturning plate, a stand rod, a protective net frame, a connection component, a power system, a guide rail and a plurality of guide seats, wherein the guide rail and the guide seats are connected in sliding and sleeving manners. The guide rail is a T-shaped guide rail. Each guide seat comprises a rotating wheel and an anti-falling swinging pin, wherein the rotating wheel is connected with the anti-falling swinging pin through a centrifugal triggering structure, when the guide rail rapidly falls, the rotating wheel drives the anti-fallingswinging pin to abut against the guide rail and brake the guide rail through the centrifugal triggering structure. By arranging the T-shaped guide rail, the locating interval is small, machining is easy, structure deformation is little, and the T-shaped guide rail is in closer fit with the guide seats. The top of each guide seat is provided with the rotating wheel, the anti-falling swinging pin and the centrifugal triggering structure, when the guide rail falls out of power control, the rotating wheel drives the anti-falling swinging pin to conduct linkage to clamp the guide rail through the centrifugal triggering structure, and the guide rail is prevented from falling; and in this way, automatic braking is conducted, and safety accidents are avoided.

The invention discloses a four-post stacker of a transporting train bogie. The four-post stacker comprises a fork mechanism, an electric control platform, a frame, a cargo carrying table, a lifting mechanism and a lifting chain, wherein the lifting mechanism is fixed on the frame and controls the lifting chain to drive the cargo carrying table so as to move up and down along the frame; the fork mechanism is fixed on the cargo carrying table for storing and fetching the bogie; and the electric control platform is fixed on the frame for fixedly connecting an electric control cabinet. According to the characteristics of the bogie, the ground supporting four-post stacker is adopted; and a four-post mechanism of the ground supporting four-post stacker can effectively distribute load and reduce structural distortion brought by imbalance stressing when the bogie is driven into or out of the stacker.

This invention relates to a matrix type pushing installation method of big span, big depth space steel structure. Its feature is that flat pack moulding bed and stand pack moulding bed are set on one span end at space steel structure installation position; slideway is set at column position of space steel structure. Chief frame is tinetoyed on flat pack noulding bed, chief frame and column is installed by the chief frame is hooked to stand pack moulding bed, then the chief frame and column is pushed translating one column distant along the slideway by pushing equipment. Next frame and column is tinetoyed at span end position, and then secong frame and purlin between two pins are installed. The two pins chief frame and column is pushed translating one column distant along the slideway by pushing equipment. Then above process is repeated until tinetoy is over, finally the whole steel structure is pushed in place along slideway and corrected and fixed. The advantage of this invention is that when construction site and equipment is restricted, structure vibration and deformation can be avoided, cumulative translation matrix form pushing method is used to install big span big depth space steel structure.

The invention discloses a passenger plane with a joined-wing configuration. The passenger plane comprises a fuselage, a first front wing, a second front wing, a first rear wing, a second rear wing, a first end plate, a second end plate, a vertical fin and at least one engine, wherein the roots of the first front wing and the second front wing are respectively and fixedly connected with the two sides of the fuselage; the root of the vertical fin is fixedly connected with the rear section of the fuselage; the roots of the first rear wing and the second rear wing are respectively and fixedly connected with the vertical fin; the upper end of the first end plate is connected with the tail of the first rear wing, and the lower end of the first end plate is connected with the tail of the first front wing; the upper end of the second end plate is connected with the tail of the second rear wing, and the lower end of the second end plate is connected with the tail of the second front wing; the engine is arranged at the rear section of the fuselage. The aerodynamic characteristics of the passenger plane are superior to those of the passenger plane with the traditional layout, the passenger plane has higher longitudinal static stability, the structural deformation of the passenger plane is smaller than that of a plane with a single wing, and the structural natural frequency of the passenger plane is higher than that of the plane with the single wing.

The invention provides a concrete shear wall with a lead core energy-consuming device and a built-in steel plate and a manufacturing method, and belongs to the field of earthquake resistance and disaster prevention and reduction of engineering structures. Connection plates with bolt holes are welded to the middle of the inner side of a structural steel frame, and studs are welded to the two sides of the steel plate with round holes distributed in a diagonal mode. The steel plate is connected with the connection plates with the bolt holes in a splicing and fastening mode through high-strength bolts, cake-shaped lead blocks with round holes are embedded in the round holes distributed in the diagonal mode, tie bars penetrate through the cake-shaped lead blocks with the round holes to be bound with reinforcing mats, and concrete is poured in the two sides of the steel plate with the round holes distributed in the diagonal mode to form the concrete shear wall. Under the action of earthquakes with common intensity, the steel plate shear wall provides sufficient rigidity for a structure; the tie bars and the lead blocks extrude to dissipate part of earthquake energy, and house structures can be normally used; under the action of earthquakes with rare earthquake intensity, the tie bars and the studs are effectively bound with a reinforced concrete wall, the steel plate is prevented from buckling outside a plane, and the structural earthquake resistance is enhanced.

The embodiment of the invention provides an absolute photoelectric encoder coded disc and an absolute photoelectric encoder. According to the invention, a hollowed-out portion of the coded disc is removed on the basis of a traditional Gray code metal coded disc, so that the mechanical strength of the coded disc is increased, the structural deformation of the coded disc is reduced, and the accuracy of the encoder is further improved. The absolute photoelectric encoder coded disc is suitable for being applied to occasions with high vibration intensity and severe environment.

The invention discloses a construction method for an opening of a contact channel of an existing shield tunnel, which comprises the following steps of: firstly, supporting and reinforcing duct pieces which do not occupy a road in an opening area and an influence range by adopting a duct piece supporting and reinforcing device; then a three-pilot-hole three-step construction method is adopted for duct piece opening construction, specifically, a middle pilot hole is excavated firstly, and a middle pilot hole connector ring beam, a stand column and a temporary steel support are constructed; a left pilot tunnel is constructed, and the left side ring beam is closed; finally, a right pilot tunnel is constructed, the right side ring beam is closed, and at the moment, totally-closed construction of the opening area ring beam is completed; and dismantling the temporary support after the ring beam is closed and reaches the design strength. According to the method, construction treatment of the existing shield tunnel evacuation channel and the entrance and exit duct piece opening can be safely and rapidly completed, the construction progress is fast, structural deformation is small, the safety quality is guaranteed, the treatment period is effectively shortened, it is ensured that a set target of a construction unit is smoothly achieved, and social benefits and economic benefits are remarkable.

The invention discloses a cable net structure-based expandable conical spiral array antenna. The cable net structure-based expandable conical spiral array antenna comprises conical spiral antennas, an upper net surface, a lower net surface and expandable peripheral trusses, wherein the conical spiral antennas are distributed in an array way, the upper net surface and the lower net surface are connected with the conical spiral antennas, the expandable peripheral trusses are connected with the upper net surface and the lower net surface, the conical spiral antennas are connected onto the upper net surface and the lower net surface by longitudinal cable segments, and the expandable peripheral trusses are arranged at the peripheries of the conical spiral antennas distributed in the array way. By the antenna, the total mass of the array conical spiral antenna is greatly reduced, and the antenna is small in processing difficulty, and is simple to assemble and is more convenient to transport; the tension force of a cable of the array conical spiral antenna is uniform, the antenna array structure is more stable, and the shaping accuracy of the array conical spiral antenna is greatly improved; and the antenna can be folded and expanded, the storage space is greatly saved, the structural deformation caused by transportation vibration is reduced, and the accuracy is improved.

The invention discloses a novel deck type arch bridge. The novel deck type arch bridge is mainly composed of an arch rib, a main girder, rigid oblique rods, upright columns and bridge piers, wherein the upright columns are arranged between the arch rib and the main girder; a plurality of V-shaped structural parts are also arranged between the arch rib and the main girder, and the V-shaped structural parts are continuously and symmetrically arranged from the midspan position to two sides; and each V-shaped structural part is mainly composed of two rigid oblique rods, and the value of a bottom included angle theta ranges from 40 degrees to 120 degrees. The V-shaped structural parts and the main girder or the arch rib form a triangular structure, and the main girder and the arch rib are constrained by the angular points of the triangular structure to ensure that constrained points fall at the maximum displacement position and the midspan position of the displacement envelope diagram of the arch rib or the main girder of the original structure, thereby enhancing the weak positions of the arch rib and the main girder and also improving the linear rigidity; and furthermore, bending and shear deformation of the structure can also be reduced by continuous arrangement of the V-shaped structural parts. The novel deck type arch bridge can also reduce the rise-to-span ratio and eliminate the 'seesaw' effect of the arch bridge when subjected to the half-span load and is especially suitable for high-speed railway bridges.

The invention relates to a high-speed and heavy-duty large-space gantry mechanical arm truss guiding and driving device and application thereof. The high-speed and heavy-duty large-space gantry mechanical arm truss guiding and driving device comprises a guiding and driving base, a motor driving mechanism, a transmission mechanisms, bearing mechanisms and elastic guiding mechanisms. The bearing mechanisms and the elastic guiding mechanisms are arranged at the two opposite sides inside the guiding and driving base. The motor driving mechanism is arranged at one side outside the guiding and driving base and transmits motion through the transmission mechanism. By means of the gantry mechanical arm truss guiding and driving device, the integral structural deformation can be reduced in the motion process of a gantry mechanical arm truss; stability, achieved in the high-speed and high-load motion process, of the gantry mechanical arm truss is improved; meanwhile, operation safety of the gantry mechanical arm truss is improved; work efficiency is improved; labor cost is lowered; and the gantry mechanical arm truss guiding and driving device is reasonable in structural design, low in production cost, convenient to mount and use and good in economic benefit and market value.

The embodiment of the invention provides a deep soft soil roadbed composite structure and a building method. The roadbed structure sequentially comprises a first soft soil layer, a second soft soil layer, geotechnical cloth, a broken stone cushion layer, a block stone layer, a gravel cushion layer, a cement stabilized broken stone layer, a cement mortar bonding layer and a surface layer composite material plate from bottom to top. In addition, the roadbed composite structure further comprises drainage blind ditches, water collecting wells, drainage plates, micro piles and drainage ditches. The roadbed structure comprehensively adopts principles and technologies of dynamic consolidation drainage, rigid support and a flexible surface layer, and dynamic consolidation drainage comprises a vertical drainage system and a horizontal drainage system. The rigid supporting effect of the micro piles can improve the bearing capacity of soft soil and reduce the deformation of an upper-layer structure of a roadbed. The surface layer composite material plate has good toughness and strength, and the service life of the surface layer is prolonged. The bearing capacity and stability of the soft soil roadbed structure can be effectively improved, and important technical support is provided for soft soil area roadbed design, building, management and maintenance and the like.